JP6706331B2 - Video projection lighting system - Google Patents

Description

The present invention relates to a video projection lighting device.

2. Description of the Related Art Various devices have been provided in which the visibility of a visual field range is improved and the sense of presence of a displayed image is improved by surrounding illumination.

For example, Patent Document 1 discloses an endoscope configured such that illumination light transmitted through a lens is distributed so that the center is dark and the periphery is bright in a ring shape. In this endoscope, the illumination light emitted from the optical element illuminates the periphery of the field of view in a ring shape, so that the field of view such as the inner wall surface of the tube during use is efficiently and intensively illuminated.

Further, in Patent Document 2, by controlling the illumination of the viewing space in conjunction with the image displayed on the screen of the image display device, it is possible to enhance the realism of the image displayed on the screen of the image display device. A lighting method and a lighting device are disclosed. In order to enhance the realism of the image, the lighting device may virtualize at least one of the parameters of the lighting level, light color, light distribution, and direction of the viewing space from the image displayed on the image display device. The one or more light sources provided in the viewing space are controlled so that they substantially match the corresponding parameters in the virtual image space.

JP-A-60-52816 JP, 2000-173783, A

In the endoscope disclosed in Patent Document 1, the optical element emits the illumination light received from the light guide from the emission end, but it is not possible to control the brightness of the illumination light for each region. Further, the emitted irradiation light is not sufficiently bright for general illumination.

Further, in Patent Document 2, the image display device and the lighting device are configured separately. For this reason, the user needs to separately prepare an image display device and an illuminating device adapted to the viewing space, and then adjust the image and the illumination light so as to improve the realism of the image. However, if these are integrated, the image quality may deteriorate due to insufficient adjustment between the image and the illumination light such as the image and the illumination light overlapping.

Therefore, it is an object of the present invention to provide an image projection illumination device that illuminates the periphery of a projected image while suppressing image quality deterioration of the projected image.

The following is a brief description of the outline of the typical inventions among the inventions disclosed in the present application.

An image projection illumination device according to a representative embodiment of the present invention emits a luminous flux of peripheral illumination light that illuminates a video projection unit that projects an image on a first area and a second area that surrounds the first area. And a peripheral illumination unit that

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows. That is, according to the representative embodiment of the present invention, it is possible to provide an image projection illumination device that illuminates the periphery of the projected image while suppressing the image quality deterioration of the projected image.

It is a figure which shows an example of a structure of the video projection illumination device which concerns on Embodiment 1 of this invention. 1 is a block diagram showing an example of a system configuration of a video projection illumination device according to Embodiment 1 of the present invention. It is a figure which shows an example of a structure of the light source which concerns on Embodiment 1 of this invention. It is a figure which illustrates the use condition of the image projection illumination device which concerns on Embodiment 1 of this invention. It is sectional drawing of the peripheral illumination part which concerns on Embodiment 1 of this invention. It is a figure explaining the principle of light distribution control by a peripheral illumination orientation control part. It is a figure which shows the relationship between the irradiation distance and illumination intensity distribution of peripheral illumination light and center illumination light. It is a figure which shows the relationship between the irradiation distance and illumination intensity distribution of peripheral illumination light and center illumination light. It is a flowchart figure which shows an example of the usage method of the video projection illumination device which concerns on Embodiment 1 of this invention. It is a figure which shows the example of the combination of the shape of the image projection area|region and the shape of an image peripheral area which concern on Embodiment 2 of this invention. It is a figure which shows an example of a structure of the peripheral illumination part and central illumination part which concern on Embodiment 2 of this invention. It is a figure which shows the example of the combination of the projection image and peripheral illumination light which concern on Embodiment 3 of this invention. It is a figure which shows an example of the form of the auxiliary illumination light in Embodiment 3 of this invention. It is a figure which shows the other example etc. regarding the image control using the auxiliary illumination light which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the video projection illuminating device which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the modification of the light distribution control part which concerns on Embodiment 5 of this invention. It is sectional drawing which shows an example of light distribution control using the diffusion cover which concerns on Embodiment 6 of this invention. It is a figure which shows an example of orientation control using the diffusion cover which made the side surface side and the image projection side differ in the diffusion performance in Embodiment 6 of this invention. It is sectional drawing which shows an example of the modification of the light source which concerns on Embodiment 7 of this invention. It is a figure which shows the other modification of the light source which concerns on Embodiment 7 of this invention. It is a figure which shows the other modification of the light source which concerns on Embodiment 7 of this invention. It is a figure which shows the other modification of the light source which concerns on Embodiment 7 of this invention. It is a figure which shows an example of the acquisition method of the three-dimensional positional information which concerns on Embodiment 8 of this invention. It is a figure which shows the example of a structure of the light distribution control part which concerns on Embodiment 9 of this invention. It is a figure which shows an example of an illuminance distribution at the time of using the some video projection illuminating device which concerns on Embodiment 9 of this invention side by side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings for explaining the embodiments, the same parts are denoted by the same reference symbols in principle and the repeated description thereof will be omitted.

(Embodiment 1)
<Device configuration>
FIG. 1 is a diagram showing an example of the configuration of a video projection illumination device according to Embodiment 1 of the present invention. 1A is a cross-sectional view of the image projection illumination device, and FIG. 1B is a plan view of the image projection illumination device as seen from the emission side. FIG. 2 is a block diagram showing an example of a system configuration of the video projection illumination device according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing an example of the configuration of the light source according to the first embodiment of the present invention. FIG. 3A is a plan view of the light source seen from the emission side, and FIG. 3B is a sectional view of the light source. FIG. 4 is a diagram illustrating a usage state of the video projection illumination device according to the first embodiment of the present invention. FIG. 4A is a diagram showing a usage situation in a video reproduction mode described later. FIG. 4B is a diagram showing a usage situation in an illumination mode described later.

As shown in FIG. 1A, the video projection illumination device 1 includes a light source substrate 51, a light source 5, a light distribution control unit 6, a video projection unit 7, a camera (imaging unit) 8, an environment sensor 9, a housing 10, and the like. Is equipped with. Further, the image projection lighting device 1 includes, for example, as shown in FIG. 2, a power source 107, an environment sensing unit 100, an operation input unit 101, a data storage unit 102, a video receiving unit 103, a control unit 110, a peripheral illumination unit 21, a center. The lighting unit 22 and the like are provided. Further, as shown in FIG. 2, the control unit 110 includes an illumination image management unit 106, an illumination control unit 104, and an image control unit 105.

The light source substrate 51 is made of a material having excellent heat dissipation, such as a metal substrate or a ceramic substrate. For example, as shown in FIG. 1A, the first main surface 51a of the light source substrate 51 is provided with a light source 5, a circuit pattern (not shown) connected to the light source 5, and the like. A circuit pattern may also be formed on the second main surface 51b of the light source substrate 51. In this case, the circuit pattern of the first main surface 51a and the second main surface 51b are formed through a through hole (not shown) penetrating the first main surface 51a and the second main surface 51b of the light source substrate 51. The circuit pattern may be connected. Electric power is supplied to the light source 5 from the power supply 107 via the circuit pattern.

As shown in FIG. 1B, for example, the plurality of light sources 5 are annularly arranged in a plan view when viewed from the emission side. For example, the plurality of light sources 5 has a double structure in which a plurality of light sources 5 are arranged along the respective circumferential directions of the inner circumference and the outer circumference. In FIG. 1B, the light source 5 is annularly arranged on both the inner circumference and the outer circumference. However, other than this, the light source 5 may be arranged in a shape such as an elliptical ring shape or a rectangular ring shape. Further, the inner peripheral side and the outer peripheral side may have different shapes of arrangement of the light sources 5.

The light source 5 includes, for example, as shown in FIG. 3, a base body 5a, an LED (Light Emitting Diode) chip 5c, and a sealing body 5d. The base 5a is, for example, as shown in FIG. 3, configured to have a rectangular shape in a plan view from the emission side and a U-shape in a sectional view. As shown in FIG. 3B, the base 5a has an opening 5b, and the LED chip 5 is arranged in the opening 5b of the base 5a. The sealing body 5 is provided so as to cover the LED chip 5c and fill the space inside the opening 5b of the base 5a.

The base 5a is made of a material having excellent heat dissipation, such as metal or ceramic. The sealing body 5d is made of, for example, a transparent resin or the like. In FIG. 3A, the shape of the base body 5a in a plan view is a rectangle, but other than this, it may be any shape such as a polygon other than a rectangle, a circle, and an ellipse.

The light source 5 is composed of, for example, an LED chip 5c that emits white light. Alternatively, the light source 5 may be composed of, for example, an LED chip 5c that emits blue light and a phosphor that is excited by receiving blue light and emits light having a spectral characteristic from green to red. In this case, the blue light and the light emitted from the phosphor are overlapped with each other, so that the light source 5 emits white light. The phosphor is composed of, for example, a YAG (Yttrium Aluminum Garnet) phosphor or the like. The phosphor is mixed with the sealing body 5d, for example.

Further, the light source 5 may be provided with optical components such as a lens and a reflector for adjusting the light distribution of the emitted light and improving the light extraction efficiency. Examples of the optical component include a convex lens made of a translucent material, a mirror made of metal vapor deposition, and a reflector using total reflection. The convex lens may be configured by, for example, the sealing body 5d that configures the light source 5, or may be separately provided on the emission side of the light source 5. Further, the mirror may be configured, for example, by depositing metal on the wall surface inside the opening 5b of the light source 5. Further, the reflector may be configured by a reflection plate provided on a wall surface or the like in the opening 5b of the light source 5.

In FIG. 3A, one LED chip 5c is provided for each light source 5, but a plurality of LED chips 5c may be provided for each light source 5. As described above, by disposing the LED chips 5c in the light source 5 so as to be divided into a plurality of parts, the heat dissipation of the LED chips 5c is improved, and the light source 5 having an increased light amount is provided.

In addition, in the light source 5 having the plurality of LED chips 5c, the plurality of LED chips 5c may be arranged symmetrically with respect to the center of the light emitting surface of the light source 5, for example, rectangular, concentric, or the like. desirable. The regions in which the plurality of LED chips 5c are arranged can be collectively regarded as the light emitting region of the light source 5, and the plurality of LED chips 5c are arranged symmetrically, which facilitates the design of the optical components of the light source 5.

Further, in FIG. 3A, the shape of the LED chip 5c is a rectangle in a plan view, but other than this, it may be any shape such as a polygon other than a rectangle, a circle, an ellipse, or the like. Absent. Further, in FIG. 1B, the plurality of light sources 5 are divided into the inner circumference and the outer circumference and are arranged side by side in two lines in a concentric circle. However, the arrangement of the light sources 5 is limited to such a form. is not. For example, the light sources 5 may be arranged for one row, or may be arranged for three rows or more.

When the light sources 5 are arranged for one row, it is desirable that the light sources 5 for emitting the luminous flux of the peripheral illumination light 11 and the light sources 5 for emitting the central illumination light 12 are alternately arranged, for example. Specifically, in the light distribution control unit 6 described later, it is desirable that a peripheral illumination light distribution control unit 6a and a central illumination light distribution control unit 6b, which will be described later, shown in FIG. In this case, since the number of light sources 5 is suppressed, the image projection lighting device 1 with reduced power consumption is provided. Further, the image projection illumination device 1 that is downsized and easy to handle is provided. On the other hand, when the light sources 5 are provided in three or more rows, the shape of the light distribution control unit 6 may be adjusted so that the orientation control is different for each row or each light source 5. As described above, by increasing the number of the light sources 5, the image projection lighting device 1 is provided in which a sufficient amount of light is obtained and the degree of freedom of the light distribution control of the light emitted from the light sources 5 is improved.

Further, in FIG. 1B, the light sources 5 are arranged concentrically in a plan view from the emitting side, but in addition to this, the peripheral illumination light 11, such as a polygonal shape such as a rectangular shape, an elliptical shape, It may be arbitrarily changed according to the situation of the area illuminated by the central illumination light 12 or the area where the image is projected.

Further, it is preferable that the light sources 5 are densely arranged. Here, “densely arranged” means that, for example, in the image peripheral area (second area) 11a shown in FIGS. 4A and 4B, the peripheral illumination light 11 emitted from the adjacent light sources 5 is emitted. It means that the light source 5 is arranged such that the ends of the light source 5 overlap each other. Similarly, with respect to the central illumination light 12, the "densely arranged" means that the central illumination light emitted from the adjacent light sources 5 in the image peripheral area 11a shown in FIGS. 4(a) and 4(b). It means that the light source 5 is arranged so that the ends of 12 overlap. As described above, when the light sources 5 are densely arranged, the illuminance distributions of the peripheral illumination light 11 emitted from the respective light sources 5 overlap each other little by little, so that the illuminance unevenness is suppressed and the smooth illuminance in the image peripheral area 11a. The distribution is obtained. Similarly, with respect to the central illumination light 12, if the light sources 5 are densely arranged, the illuminance distributions of the central illumination lights 12 emitted from the respective light sources 5 overlap each other little by little, so that the illuminance unevenness is suppressed and the image projection area is reduced. In 12a, a smooth illuminance distribution is obtained.

Further, when the light sources 5 are arranged in a plurality of columns, it is desirable that the light sources 5 in adjacent columns are arranged so as not to be aligned in a direction orthogonal to the columns. Specifically, it is desirable that the light sources 5 in adjacent rows are not arranged adjacent to each other but are alternately arranged along the rows. As a result, in a region where the illumination lights emitted from the light sources 5 in the adjacent columns overlap each other, along the column, the region illuminated mainly by the illumination light emitted from the light sources 5 in one column and the region mainly illuminated in the other region. Areas illuminated by the illumination light emitted from the light sources 5 in the rows appear alternately. Therefore, in the area where the illumination light emitted from the light sources 5 in the adjacent rows overlap, the illumination unevenness of the illuminance distribution due to the illumination light emitted from the light sources 5 arranged in one row and the illumination light emitted from the light sources 5 in the adjacent rows. Since the illuminance unevenness of the illuminance distribution due to the illuminated light is canceled, high-quality illumination light is provided.

For example, in FIG. 1B, with respect to the light source 5 on the inner circumference and the light source 5 on the outer circumference, only the light source 5 on either the inner circumference or the outer circumference is arranged in the radial direction, that is, in the linear direction extending from the center of the light source substrate 51. It is supposed to be done. Further, the light sources 5 on the inner circumference and the light sources 5 on the outer circumference are alternately arranged in the circumferential direction. As a result, in the boundary area between the image peripheral area 11a and the image projection area 12a, the area mainly illuminated by the peripheral illumination light 11 and the area mainly illuminated by the central illumination light 12 appear alternately. Therefore, the illuminance unevenness of the illuminance distribution due to the peripheral illumination light 11 and the illuminance unevenness of the illuminance distribution due to the central illumination light 12 are canceled out, so that high-quality illumination light is provided.

As shown in FIG. 1A, the light distribution control unit 6 is arranged to face the light source substrate 51 on the side of the first main surface 51a that is the emission side. The orientation control unit 6 includes a peripheral illumination orientation control unit 6a that controls the light distribution of the light source 5 on the outer peripheral side, and a central illumination light distribution control unit 6b that controls the light distribution of the light source 5 on the inner peripheral side. As shown in FIG. 1A, the light distribution control unit 6 is configured by integrating a peripheral illumination alignment control unit 6a and a central illumination alignment control unit 6b. The orientation control unit 6 is made of, for example, a translucent resin such as polymethylmethacrylate resin (PMMA: Polymethyl Methacrylate) or polycarbonate (PC: polycarbonate). The orientation control unit 6 is integrally formed by, for example, injection molding, a peripheral illumination alignment control unit 6a corresponding to a plurality of light sources and a central illumination alignment control unit 6b. As a result, the orientation control unit 6 that is easy to assemble and reduces the manufacturing cost is provided.

The peripheral light source 5 and the peripheral illumination light distribution control unit 6a configure the peripheral illumination unit 21 shown in FIG. Further, the light source 5 on the inner circumference and the central illumination alignment control section 6b constitute the central illumination section 22 shown in FIG. For example, as shown in FIG. 1A, the peripheral illumination orientation control unit 6a of the peripheral illumination unit 21 has a surface facing the light source 5, that is, a light incident surface 6c is flattened and a surface opposite to the light source 5. That is, the light emitting surface 6d is formed by a convex lens protruding in the light emitting direction. The peripheral illumination light distribution control unit 6a suppresses the divergence of the light flux emitted from the light source 5 and emits the light flux emitted from the light source 5 so as not to overlap the image projection area (first area) 12a described later. It is configured to be oriented more outward.

The peripheral illumination light distribution control unit 6a will be described in detail below. FIG. 5 is a cross-sectional view of the peripheral illumination unit according to the first embodiment of the present invention. The divergence angle of the light flux emitted from the light source 5 on the outer periphery is suppressed by the peripheral illumination light distribution control unit 6a of the light distribution control unit 6.

For example, in FIG. 5, the peripheral illumination light distribution control unit 6 a is arranged such that its optical axis is located on the opposite side of the optical axis of the light source 5 from the image projection unit 7. Therefore, the peripheral illumination light 11 is emitted toward the outside of the image projection area 12a. Specifically, as shown by the arrow in FIG. 5, the light flux emitted from the light source 5 is directed to the outside of the front of the image projection illumination device 1, that is, to the image peripheral region 11a outside the image projection region 12a. Is emitted.

The principle of the peripheral illumination light 11 thus emitted outward will be described below. FIG. 6 is a diagram for explaining the principle of light distribution control by the peripheral illumination orientation control unit. FIG. 6A is a diagram showing how the light distribution of the light source is converted when the optical axis of the light source and the optical axis of the peripheral illumination light distribution control unit match. FIG. 6B is a diagram showing how the light distribution of the light source is converted when the optical axis of the light source and the optical axis of the peripheral illumination light distribution control unit are different. FIG. 6C is a diagram showing a light distribution distribution in the optical system of FIG. FIG. 6D is a diagram showing a light distribution distribution in the optical system of FIG. 6B. Note that FIGS. 6A to 6D show a case where the light source has a diameter of 2R and emits Lambertian light.

When the optical axis of the light source 1500 and the optical axis of the lens 1600 are aligned and the light source 1500 is disposed at the focal position f of the lens 1600, the light flux at the center of the optical axis is shown in the figure as shown in FIG. 6A, for example. Go straight in the axial direction (the direction of the thick arrow). The light flux emitted from the end of the light source 1500 (for example, the coordinate r=R) travels downward in the direction of θ _{0 in} the figure. The light flux emitted from the other end (for example, the coordinate r=−R) of the light source 1500 travels upward in the direction of θ _{0 in} the figure.

When the center of the light source 1500 is arranged so as to be displaced from the axis of the lens 1600 so that the coordinate r=R, as shown in FIG. 6B, the luminous flux at the center of the optical axis is directed downward in the direction of θ ₀ (the direction of the thick arrow). ) To proceed. The light flux emitted from the end point (coordinate r=2R) of the light source 1500 travels downward in the direction of 2θ _{0 in} the figure. The light flux emitted from the other end point (coordinate r=0) of the light source 1500 travels in the horizontal direction (direction of 0°) in the figure.

The light distribution (luminous intensity) I of the light source 1500 that emits Lambertian light is, as shown by broken lines in FIGS. 6C and 6D, I follows cos θ and is the most in the front direction (θ=0°). The strength is strong and becomes 0 in the horizontal direction (θ=±90°).

As shown in FIG. 6A, when the light source 1500 and the lens 1600 are aligned with each other and the light source 1500 is arranged at the focal position f of the lens 1600, Lambertian light emission is performed as shown in FIG. 6C. light distribution of the light source 1500, a lens 1600 is converted from upward theta ₀ in the light distribution between the downward θ ₀ (± θ _0).

As shown in FIG. 6B, when the light source 1500 is arranged so as to be displaced from the axis of the lens 1600 so that the center of the light source 1500 has a coordinate r=R, as shown in FIG. The light distribution is converted by the lens 1600 into a light distribution from an angle of 0° to 2θ ₀ downward.

If the focal length of the lens 1600 is f, then θ ₀ satisfies the condition of tan θ ₀ =R/f. Further, when the light emitting area of the light source 1500 is the same, the divergence angle of the light flux after passing through the lens 1600 becomes narrower as the focal length of the lens 1600 becomes longer and becomes wider as the focal length of the lens 1600 becomes shorter. That is, if the position of the light source 1500 shifts toward the lens 1600 side along the optical axis direction, the light distribution of the light flux after passing through the lens 1600 widens, and the light amount attenuates as the angle with respect to the optical axis increases.

In this way, by using the refraction of the lens, it is possible to control the angle at which the light beam emitted from the light source 5 diverges and the emission direction. In the present embodiment, as shown in FIG. 1A, the optical axis of the peripheral illumination light distribution control unit 6 a in the light distribution control unit 6 is located outside the video projection device 1 with respect to the optical axis of the light source 5. Since they are deviated, the light flux from the light source 5 is emitted toward the outside. A spherical lens may be used for the peripheral illumination light distribution control unit 6a, or, for example, an aspherical lens or a free-form surface lens may be used depending on the desired light distribution.

As described above, the peripheral illumination unit 21 does not illuminate the image projection area 12a, and as shown in FIGS. 4A and 4B, the image periphery area (second area) 11a surrounding the image projection area 12a is displayed. The peripheral illumination light 11 for illuminating is emitted.

On the other hand, in the central illumination orientation control unit 6b of the central illumination unit 22, the entrance surface 6c and the exit surface 6d are flat, as shown in FIG. 1A, for example. Therefore, the central light distribution control unit 6b shown in FIG. 1A does not have the function of changing the orientation of the light emitted from the light source 5, unlike the peripheral orientation control unit 6a. That is, the central illumination alignment controller 6b emits the central illumination light 12 at the same angle as the incident angle to the incident surface 6c. Therefore, the central illumination light 12 emitted from the central illumination unit 22 emits Lambertian light and illuminates the image projection area 12a. In the following, the peripheral illumination light 11 and the central illumination light 12 may be collectively referred to as “illumination light”. Further, the peripheral illumination unit 21 and the central illumination unit 22 may be collectively referred to as an “illumination unit”.

In addition, light passing through a region or an end surface where the light distribution control effect is weak may become unnecessary stray light and overlap with the illumination light to generate a clear bright line or shadow. Therefore, in the light distribution control unit 6, a region or an end face having such a weak light distribution control effect is subjected to diffusion processing for diffusing the light beam emitted from the light source 5, or has a light blocking surface for blocking the light beam. It may be provided. As a result, the generation of stray light is suppressed, so that high-quality peripheral illumination light 11 and central illumination light 12 are provided.

A plurality of peripheral lighting units 21 and a central lighting unit 22 may be provided, and light distribution control may be different for each lighting unit. Further, the peripheral illumination section 21 and the central illumination section 22 may be configured to be able to illuminate a wide range such as a floor, a wall, or a ceiling, or are configured to select and illuminate any of these areas. May be. Further, FIG. 1A shows an example in which the peripheral illumination section 21 is arranged outside the central illumination section 22, but the arrangement of the peripheral illumination section 21 and the central illumination section 22 is limited to such a case. I can't. For example, the central lighting unit 22 may be arranged outside the peripheral lighting unit 21.

7 and 8 are diagrams showing the relationship between the illumination distance of the peripheral illumination light and the central illumination light and the illuminance distribution. FIG. 7 shows the relationship between the irradiation distance and the illuminance distribution when the light source 5 on the outer circumference constitutes the peripheral illumination section 21 and the light source 5 on the inner circumference constitutes the central illumination section 22. On the other hand, FIG. 8 shows the relationship between the irradiation distance and the illuminance distribution when the light source 5 on the inner circumference constitutes the peripheral illumination section 21 and the light source 5 on the outer circumference constitutes the central illumination section 22. .. That is, FIG. 8 shows the relationship between the irradiation distance of the peripheral illumination light and the central illumination light and the illuminance distribution when the central illumination unit 22 is arranged outside the peripheral illumination unit 21. 7 and 8, the central illumination light distribution control unit 6b of the light distribution control unit 6 projects toward the emission side, and the central illumination light distribution control unit 6b controls the light distribution of the central illumination light 12. ..

FIG. 7A shows an illumination range of the peripheral illumination light 11 and the central illumination light 12 at positions apart from the light source substrate 51 in the optical axis direction of the light source 5 by distances L0 and L1 (L0<L1). FIG. 7B shows the illuminance distributions of the peripheral illumination light 11 and the central illumination light 12 at positions apart from the light source substrate 51 in the optical axis direction of the light source 5 by distances L0 and L1. In FIG. 7B, the area illuminated by the peripheral illumination light 11 at the position of the distance L0 is shown as the illumination area A1, and the area illuminated by the peripheral illumination light 11 at the position of the distance L1 is shown as the illumination area A2. .. Further, in FIG. 7B, the area illuminated by the central illumination light 12 at the position of the distance L0 is shown as an illumination area B1, and the area illuminated by the central illumination light 12 at the position of the distance L1 is shown as an illumination area B2. Has been done.

According to FIG. 7A, since the peripheral illumination unit 21 is arranged outside the central illumination unit 22, that is, on the side opposite to the image projection unit 7 with respect to the central illumination unit 22, the illumination areas A1 and B1. However, the illumination areas A2 and B2 do not intersect even when the distance L0 changes to L1. In this case, as shown in FIG. 7B, an illuminance distribution shape that is not affected by the irradiation distance can be obtained. The illuminance of each illumination light in the illumination areas A2 and B2 is lower than the illuminance in the illumination areas A1 and B1 as shown in FIG. 7B.

With this configuration, even if the illumination distance is not predetermined, the user can arbitrarily determine the distance between the image projection illumination device 1 and the projection destination or the illumination destination without being affected by the shape of the illumination distribution.

FIG. 8A shows the illumination range of the peripheral illumination light 11 and the central illumination light 12 at positions apart from the light source substrate 51 in the optical axis direction of the light source 5 by distances L0 and L1 (L0<L1). FIG. 8B shows the illuminance distributions of the peripheral illumination light 11 and the central illumination light 12 at positions apart from the light source substrate 51 in the optical axis direction of the light source 5 by distances L0 and L1. In FIG. 8B, the area illuminated by the peripheral illumination light 11 at the position of the distance L0 is shown as an illumination area B11, and the area illuminated by the peripheral illumination light 11 at the position of the distance L1 is shown as an illumination area B12. .. In FIG. 8B, the area illuminated by the central illumination light 12 at the position of the distance L0 is shown as an illumination area A11, and the area illuminated by the central illumination light 12 at the position of the distance L1 is shown as an illumination area A12. Has been done. Further, in FIG. 8A, the peripheral illumination light distribution control unit 6a is arranged inside and the central illumination light distribution control unit 6b is provided outside.

According to FIG. 8A, since the peripheral illumination unit 21 is arranged inside the central illumination unit 22, that is, between the central illumination unit 22 and the image projection unit 7, the illumination regions A11 and B11, the illumination region. A12 and B12 intersect each other. Further, in the area where the illumination light intersects, as shown in FIG. 8B, the illuminance is increased as compared with the other areas. Further, when the distance in the optical axis direction of the light source 5 from the light source substrate 51 changes from L0 to L1, the position where the illuminance becomes higher than the illuminance distribution shape at the distance L0 changes.

In this way, when the positions of the peripheral lighting unit 21 and the central lighting unit 22 are switched, the shape of the illuminance distribution is affected by the lighting distance, so that the shape of the desired illuminance distribution is obtained according to the assumed lighting distance. The shape of the light distribution control unit 6 may be changed accordingly. For example, the shape of the central illumination light distribution control unit 6b is changed so that the central illumination light 12 further illuminates the inside. Alternatively, the shape of the peripheral illumination light distribution control unit 6a is changed so that the peripheral illumination light 11 illuminates the outside further. Further, changing the shape of the peripheral illumination light distribution control unit 6a and changing the shape of the central illumination light distribution control unit 6b may be combined. Thereby, as shown in FIG. 8, the peripheral illumination section 21 can be arranged inside the central illumination section 22.

In FIGS. 7 and 8, the boundaries of the light fluxes from the respective light sources 5 are made clear, but in order to obtain a smooth illuminance distribution by connecting the light fluxes from the respective light sources 5, the boundaries of the light fluxes are different from each other. The light distribution may be attenuated from the center toward the periphery. Even in that case, if the angle at which the light fluxes intersect is made small, an illuminance distribution shape in which the influence of the illumination distance is suppressed can be obtained.

The image projection unit 7 projects an image according to the image signal output from the control unit. The image projection unit 7 internally includes an illumination system for image projection and a projection system. The projection system projects the image by emitting the image light 4 corresponding to the image signal toward the image projection area 12a. The illumination system emits a light flux of illumination correction light described later.

An LED, a semiconductor laser, or the like is used for the light source of the illumination system of the image projection unit 7. For image modulation in the projection system, for example, a DMD (Digital Mirror Device), an LCD (Liquid Crystal Display), or the like is used. If necessary, the illumination system for image projection may be provided with, for example, a polarization conversion element, an integrator lens such as a light guide, and a multi-lens.

Further, as another image projection method, an image may be projected by combining a laser light source and a two-axis MEMS (Micro Electro Mechanical Systems) mirror and performing laser scanning.

The camera 8 photographs the object in the video projection area 12a and its peripheral area, and generates a captured image of the object. Then, the camera 8 outputs the generated captured image to the control unit 110, for example. The captured image generated by the camera 8 is used, for example, to acquire the ambient illumination light 11 that illuminates the video peripheral area 11a and the brightness information such as the brightness of the video projected on the video projection area 12a. In addition, the captured image is used to obtain an operation signal related to an operation related to changing various settings such as the illuminance of illumination light, an operation related to switching to a video reproduction mode or an illumination mode described later, and other operations related to the video projection illumination device 1. Also used for. The method of acquiring the operation signal will be described later.

Then, the control unit 110 acquires an operation signal regarding the operation of the video projection illumination device 1 based on the captured image output from the camera 8. For example, the control unit 110 detects an operation of an object such as a user's hand or finger or a stick for pointing from a plurality of captured images, and acquires an operation signal by analyzing the detected operation. Specifically, the control unit 110 reads out a pattern for extracting the shape of the target object, which is stored in advance in the data storage unit 102, and extracts the shape and position of the target object by pattern matching. The control unit 110 detects the motion of the user's hand or finger by performing such processing on each captured image. Then, the control unit 110 controls each unit of the video projection illumination device 1 based on the acquired operation signal.

The angle of view of the camera 8 is wider than the angle of view of the image projected by the image projection unit 7, and is set so that the entire image projection region 12a can be photographed, for example. Further, it is desirable that the angle of view of the camera 8 is set so that a region further outside the image peripheral region 11a illuminated by the peripheral illumination light 11 shown in FIG.

The camera 8 preferably has an optical performance capable of focusing at an arbitrary position between the image projection illumination device 1 and the image projection area 12a. The camera 8 may also have an autofocus function. According to this configuration, it is possible to acquire information such as the brightness of the projected image affected by the illumination light, the color and material of the projection destination (the image projection area 12a), and the like in the entire image projectable range. Becomes Specifically, at a certain position, by comparing the color and brightness of the assumed video signal with the color and brightness of the projection destination obtained from the image captured by the camera 8, the optical and the brightness of the projection destination are compared. The feature quantity can be extracted. By analyzing and calculating this characteristic amount by, for example, the control unit 110 or the like, it is possible to correct the projection image so that the intended image is displayed. In this way, in the image projection lighting device 1, the projected image is automatically adjusted.

In addition to the camera 8, the image projection illumination device 1 may acquire an operation signal based on the distance of the user's hand, finger, or the like measured by the TOF (Time Of Flight) method, for example. Further, the image projection lighting device 1 may acquire an operation signal from a remote controller, a touch panel, an input button, or the like. Further, the image projection lighting device 1 may acquire the operation signal based on the audio information input from the microphone (not shown).

The environment sensor 9 acquires environment information about the environment around the image projection lighting device 1, for example, brightness and surrounding color. The environment sensor 9 outputs the acquired environment information to the environment sensing unit 100 shown in FIG. 2, for example. The acquired environment information is used, for example, when calculating an image correction parameter for correcting the projected image. The image correction parameters will be described later. The environment sensor 9 may be connected to the control unit 110 and output the acquired environment information to the control unit 110, for example. In this case, the control unit 110 calculates the above-mentioned image correction parameter and the like.

The housing 10 accommodates the respective parts shown in FIGS. 1 and 2 inside. The shape of the housing 10 may be, for example, as shown in FIG. 1, a truncated cone or a cylinder whose inside is hollow and whose exit sides of the peripheral illumination light 11, the central illumination light 12, and the image light 4 are opened. For example, it may be a truncated pyramid such as a truncated pyramid or a truncated hexagon having an opening on the exit side.

The power supply 107 supplies power to each unit of the image projection lighting device 1. The power supply 107 may obtain electric power from, for example, an outlet, or may be composed of a battery, for example.

The environment sensing unit 100 corrects the projected image based on the environment information acquired by the environment sensor 9. For example, the environment sensing unit 100 determines the brightness and color of the projected image so that the influence of the ambient light on the brightness and color of the projected image can be suppressed based on the information such as the ambient brightness and the color included in the environment information. Equipped with a video correction function for correction. Specifically, the environment sensing unit 100 calculates a video correction parameter for correcting a video so that the brightness and the color are desired, based on the environment information acquired by the environment sensor 9. Alternatively, the environment sensing unit 100 may read a predetermined image correction parameter based on the environment information from the data storage unit 102 shown in FIG. The environment sensing unit 100 outputs the calculated or read image correction parameter to the control unit 110.

The environment sensing unit 100 may be provided in the control unit 110 described later. In this case, the environment sensor 9 is connected to the control unit 110, and the acquired environment information is output from the environment sensor 9 to the control unit 110.

Further, the operation input unit 101 is configured by, for example, a receiving unit of an operation signal transmitted from a remote controller, a touch panel, an input button, and the like. For example, an operation signal from a user is directly input to the touch panel, the input button, or the like. In addition, the operation input unit 101 includes, for example, the camera 8 and the control unit 110. The camera 8 and the control unit 110 acquire an operation signal based on the motion of the target object, and each unit of the video projection illumination device 1 is controlled based on the acquired operation signal.

The data storage unit 102 is composed of, for example, a non-volatile memory, and stores various data regarding the video projection illumination device 1. The data storage unit 102 stores, for example, a program for operating the image projection illumination device 1, various setting information, various parameters regarding the peripheral illumination light 11, the central illumination light 12, the image light 4, and the like, image correction parameters, and the like. The parameters stored in the data storage unit 102 are, for example, data indicating the relationship between the brightness of the peripheral illumination light 11 and the current, which is set at the time of shipping work, and for automatically adjusting the peripheral illumination light 11 and the central illumination light 12. It is composed of data and the like showing the relationship between the environmental information of (1) and the brightness of illumination light.

The video receiving unit 103 is connected to, for example, an external device (not shown), and receives a video signal related to the video projected on the video projection unit 12a from the external device. The video signal mentioned here includes, for example, contents linked with a smartphone, contents stored in an external memory, contents obtainable from the Internet, and the like. The image receiving unit 103 may be connected to an external device by wire, or may be wirelessly connected to the external device by, for example, near field communication. Further, the video receiving unit 103 includes a data reading unit of an external memory such as an SD card, a CD (Compact Disc), a DVD (Digital Versatile Disc) or the like, and is configured to read a video signal stored in these external memories. Good. The video receiving unit 103 outputs the received or read video signal to the control unit 110. The video receiving unit 103 may output the video signal to the data storage unit 102 and store the video signal in the data storage unit 102.

As shown in FIG. 2, the control unit 110 includes an illumination image management unit 106, an illumination control unit 104, and an image control unit 105.

The control unit 110 controls, for example, the peripheral illumination unit 21, the central illumination unit 22, the image projection unit 7, and the like. The illumination image management unit 106 controls, for example, a predetermined illumination control signal and image control based on various information output from the environment sensing unit 100, the operation input unit 101, the image reception unit 103, the parameters read from the data storage unit 102, and the like. Generate a signal. Further, the illumination image management unit 106 outputs the generated illumination control signal to the illumination control unit 104 and outputs the generated image control signal to the image control signal 105.

The illumination control unit 104 switches ON/OFF of the light emission of the peripheral illumination unit 21 and the central illumination unit 22 and sets the emission intensity, the emission color, and the like based on the illumination control signal output from the illumination image management unit 106. To do.

The video control unit 105 switches ON/OFF of the video projection by the video projection unit 7 and the video light based on the video control signal output from the illumination video management unit 106 and the video signal output from the video reception unit 103. 4 modulation and the like. For example, the image control unit 105 corrects the brightness and color of the projected image based on the image correction parameter output from the environment sensing unit 100. As described above, since the brightness and color of the projected image are corrected according to the surrounding environment, the image projection illumination device 1 capable of projecting a desired image even in a situation where the ambient light is different is provided. It

The control unit 110 also calculates the image correction parameter based on the environment information output from the environment sensor 9. For example, the illumination image management unit 106 calculates the image correction parameter based on the environment information. Alternatively, the illumination image management unit 106 may read the image correction parameter based on the environment information from the data storage unit 102.

Further, the control unit 110 switches the operation mode of the video projection lighting device 1 to a menu display mode, a lighting mode, and a video reproduction mode, which will be described later. Here, each operation mode will be described.
[Menu display mode]

First, the menu display mode is a mode in which the selection of the menu by the user is accepted. In the menu display mode, for example, a menu image for selecting the operation mode is projected on the image projection region 12a, and the image peripheral region 11a is illuminated by the peripheral illumination light 11. In the menu display mode, the menu image may be projected, and the image peripheral area 11a may not be illuminated by the peripheral illumination light 11. Further, the central lighting unit 22 does not illuminate the image projection area 12a.

In the menu display mode, for example, the control unit 110 reads out image data relating to a menu image from the data storage unit 102 and generates an image control signal based on the read image data or the like. The control unit 110 also generates, for example, an illumination control signal that causes the peripheral illumination unit 21 to emit the peripheral illumination light 11 and does not cause the central illumination unit 22 to emit the central illumination light 12. Then, the image projection unit 7 emits the image light 4 related to the menu image based on the generated image control signal. The peripheral illumination unit 21 emits the peripheral illumination light 11 based on the generated illumination control signal, and the central illumination unit 22 does not emit the central illumination light 12 based on the generated illumination control signal.

Note that the menu image may include not only an image regarding selection of the illumination mode and the image reproduction mode, but also an image regarding various settings of the image projection illumination device 1, for example.
[Lighting mode]

Next, the illumination mode (second mode) will be described. The illumination mode is a mode in which the peripheral illumination unit 21 emits the peripheral illumination light 11 and the central illumination unit 22 emits the central illumination light 12 at the same time based on the operation signal received by the operation input unit 101. In the illumination mode, the image projection unit 7 does not project the image.

In the illumination mode, the control unit 110 generates, for example, an illumination control signal that causes the peripheral illumination unit 21 to emit the peripheral illumination light 11 and causes the central illumination unit 22 to emit the central illumination light 12. Further, the control unit 110 generates, for example, an image control signal that does not cause the image light 4 to be emitted from the image projection unit 7. Then, the peripheral illumination unit 21 and the central illumination unit 22 respectively emit the peripheral illumination light 11 and the central illumination light 12 based on the generated illumination control signal. Further, the image projection unit 7 does not emit the image light 4 based on the generated image control signal.
[Video playback mode]

Next, the video reproduction mode (first mode) will be described. The video reproduction mode is a mode in which, based on the operation signal received by the operation input unit 101, the peripheral illumination unit 21 emits the peripheral illumination light 11 and the video projection unit 7 projects the image at the same time. In the video reproduction mode, the central illumination unit 22 does not emit the central illumination light 12.

In the video reproduction mode, the control unit 110 generates, for example, an illumination control signal that causes the peripheral illumination unit 21 to emit the peripheral illumination light 11 and does not cause the central illumination unit 22 to emit the central illumination light 12. The control unit 110 also generates, for example, an image control signal that causes the image projection unit 7 to emit the image light 4 regarding a predetermined image. Then, the peripheral illumination unit 21 emits the peripheral illumination light 11 based on the generated illumination control signal. Further, the image projection unit 7 emits the image light 4 based on the generated image control signal. Further, the central illumination unit 22 does not emit the central illumination light 12 based on the generated illumination control signal.

<How to use the image projection lighting device>
Next, a method of using the image projection lighting device will be described. FIG. 9: is a flowchart figure which shows an example of the usage method of the video projection illuminating device which concerns on Embodiment 1 of this invention. In the image projection lighting device 1, for example, as shown in FIG. 9, each processing in steps S10 to S90 is executed.

First, in step S10, the user operates the power supply 107 to turn on the power of the video projection illumination device 1. Then, the environment sensor 9 acquires environment information of the surrounding environment of the image projection lighting device 1. Then, the environment sensor 9 outputs the acquired environment information to, for example, the control unit 110.

In step S20, the control unit 110 (for example, the illumination image management unit 106) reads out the image correction parameter based on the environment information output from the environment sensor 9 from the data storage unit 102.

In step S30, the illumination image management unit 106 generates an illumination control signal that causes the ambient illumination light 11 to be emitted, based on the readout image correction parameter. Then, the illumination video management unit 106 outputs the generated illumination control signal to the illumination control unit 104. The illumination control unit 104 causes the ambient illumination unit 21 to emit the ambient illumination light 11 based on the output illumination control signal. As a result, the peripheral illumination unit 21 is turned on.

In step S40, the image projection unit 7 projects the menu image on the image projection area 12a. For example, the illumination video management unit 106 reads the image data relating to the menu video from the data storage unit 102, and generates a video control signal based on the read image data or the like. The illumination image management unit 106 outputs the generated image control signal to the image control unit 105. Then, the image control unit 105 causes the image projection unit 7 to emit the image light 4 regarding the menu image based on the output image control signal. As a result, the image projection lighting device 1 is set to the menu display mode.

Further, in the menu display mode, the control unit 110 (for example, the illumination image management unit 106) acquires the illuminance information of the peripheral illumination light 11 and the luminance information of the menu image based on the captured image generated by the camera 8. Further, the environment sensor 9 may acquire new environment information even after the menu image is projected. Then, the illumination image management unit 106 generates a new illumination control signal or image control signal based on the brightness information or the new environment information even after the menu image is projected, and the illuminance of the peripheral illumination light 11 and the brightness of the menu image. And so on. By the steps S10 to S40 thus far, the standby process after the power is turned on is completed. When the menu display mode is set, the image projection lighting device 1 is in a state of waiting for the input of an operation signal from the user. During this period, the operation signal from the user is detected, for example, by the camera 8 capturing an object near the image projection area 12a.

In step S50, the control unit 110 determines the detected operation signal. For example, when the control unit 110 detects an operation signal for switching to the illumination mode, the process of step S60 is performed as shown in FIG. On the other hand, for example, when the control unit 110 detects an operation signal for switching to the video reproduction mode, the process of step S70 is performed as shown in FIG. When the control unit 110 detects an operation signal other than these, as shown in FIG. 9, the operation signal is detected again in step S40.

In step S60, the control unit 110 (for example, the illumination image management unit 106) generates an illumination control signal that causes the central illumination light 12 to be emitted. Then, the illumination video management unit 106 outputs the generated illumination control signal to the illumination control unit 104. The illumination control unit 104 causes the central illumination unit 22 to emit the central illumination light 12 based on the output illumination control signal. As a result, the central lighting unit 22 is turned on. Therefore, both the peripheral illumination section 21 and the central illumination section 22 are turned on, and the operation mode is switched from the menu display mode to the illumination mode. Further, even after switching to the illumination mode, the control unit 110 adjusts the illuminance of the peripheral illumination light 11 and the central illumination light 12 based on the brightness information and the new environment information. Further, in step S60, the operation signal is continuously detected even after the operation mode is switched to the illumination mode.

In step S70, the control unit 110 (for example, the illumination image management unit 106) generates an image control signal that causes the image light 4 to be emitted. At this time, the control unit 110 may cause the user to select a content from the content selection video for selecting the video to be projected and generate the video control signal based on the selected content or the like. Then, the illumination image management unit 106 outputs the generated illumination control signal to the image control unit 105. The image control unit 105 causes the image projection unit 7 to emit the image light 4 based on the output image control signal. Thereby, the image is projected and the operation mode is switched from the menu display mode to the image reproduction mode. Further, even after the switching to the video reproduction mode, the control unit 110 adjusts the illuminance of the peripheral illumination light 11 and the brightness of the video light 4 based on the brightness information and the new environment information. Also in step S70, the operation signal is continuously detected even after the operation mode is switched to the video reproduction mode.

Next, a case where the illumination mode and the video reproduction mode are switched to each other will be described. In step S80, control unit 110 determines the operation signal detected during the illumination mode. When the control unit 110 detects an operation signal for switching to the video reproduction mode during the illumination mode, the process of step S70 is performed as shown in FIG.

When the operation mode is switched from the illumination mode to the image reproduction mode, in step S70, the control unit 110 (for example, the illumination image management unit 106) stops the emission of the central illumination light 12 and then the image projection unit. A predetermined image is projected from 7. The illumination image management unit 106 generates, for example, an illumination control signal that stops the emission of the central illumination light 11. The illumination control unit 104 stops the emission of the central illumination light 12 from the central illumination unit 22 based on the generated illumination control signal. As a result, the central lighting unit 22 is turned off. Then, the control unit 110 performs the above-described processing of emitting the image light 4 and the like.

When determining in step S80 that the operation signal for ending the illumination mode has been detected, the control unit 110 performs a process of stopping the emission of the central illumination light 12. Thus, when the central portion 22 is turned off, the illumination mode ends, as shown in FIG. In addition, when the control unit 110 determines that an operation signal other than these is detected, the illumination mode is continued as shown in FIG. 9.

In step S90, control unit 110 determines the operation signal detected during the video reproduction mode. When the control unit 110 detects an operation signal for switching to the illumination mode during the video reproduction mode, the process of step S60 is performed as shown in FIG.

When the operation mode is switched from the image reproduction mode to the illumination mode, the control unit 110 (for example, the illumination image management unit 106) stops the emission of the image light 4 and then the central illumination light 12 in step S90. To be emitted. The illumination image management unit 106 generates, for example, an image control signal for stopping the emission of the image light 4. The video control unit 105 stops the emission of the video light 4 from the video projection unit 7 based on the generated video control signal. As a result, the image projection is turned off. Then, the control unit 110 performs the above-described processing of emitting the central illumination light 12 and the like.

In step S90, when the control unit 110 determines that the operation signal for ending the video reproduction mode is detected, the control unit 110 performs a process of stopping the emission of the video light 4. Thus, when the image projection is turned off, the image reproduction mode ends, as shown in FIG. When the control unit 110 determines that an operation signal other than these is detected, the video reproduction mode is continued as shown in FIG.

Although not shown in FIG. 9, the control unit 110 detects a predetermined operation signal in the illumination mode or the image reproduction mode, for example, an object such as a hand or a finger of the user passes in front of the camera 8. In this case, the operation mode may be switched to the menu display mode. By doing so, the menu image can be displayed and switched to the menu display mode at an arbitrary timing. In order to return to the menu display mode, the function of the operation input unit 101 other than the camera 8 may be used, or the operation input unit 101 can detect the operation of the user. Further, the flowchart shown in FIG. 9 is an example of how to use the image projection illumination device, and various modifications may be added depending on the situation.
<Effects of this embodiment>

According to the present embodiment, the image projection illumination device 1 includes the image projection unit 7 that projects an image on the image projection region 12a, and the peripheral illumination unit 21 that illuminates the image peripheral region 11a that surrounds the image projection region 12. ing.

According to this configuration, since the projected image 14 and the peripheral illumination light 11 do not overlap with each other, the image projection illumination device 1 that illuminates the periphery of the projected image 14 while suppressing the image quality deterioration of the projected image 14 is provided.

Further, according to the present embodiment, the central illumination unit 22 that illuminates the image projection area 12a is provided. According to this configuration, the peripheral illumination light 11 and the central illumination light 12 can be emitted at the same time, so that the image projection illumination device 1 in which the illuminance of the illumination light is further improved is provided.

Further, according to the present embodiment, the peripheral illumination section 21 and the central illumination section 22 are provided with the light distribution control section 6. According to this configuration, the luminous fluxes of the peripheral illumination light 11 and the central illumination light 12 are controlled, so that the image projection illumination device 1 in which the accuracy of the emission directions of the peripheral illumination light 11 and the central illumination light 12 is further improved. Provided.

Further, according to the present embodiment, control unit 110 adjusts the illuminance of ambient illumination light 11 based on the environmental information acquired by environmental sensor 9. According to this configuration, the ambient illumination light 11 can be adjusted to the surrounding environment, and thus the image projection illumination device 1 with improved versatility is provided.

Further, according to the present embodiment, control unit 110 adjusts the brightness of projection image 14 based on the environmental information acquired by environmental sensor 9. According to this configuration, the projected image 14 can be corrected according to the surrounding environment, so that the image projection illumination device 1 with improved versatility is provided.

Further, according to the present embodiment, the light source substrate 51 is made of a material having excellent heat dissipation. Generally, when the temperature of the light source 5 rises, the light emission efficiency decreases, but if the light source substrate 51 having excellent heat dissipation is used, the temperature rise of the light source 5 can be suppressed, so that the highly efficient image projection lighting device 1 can be provided. Provided. Further, this makes it possible to prolong the continuous use time, and to provide the image projection illumination device 1 having excellent versatility.

Further, according to the present embodiment, the operation input unit 101 that receives an operation signal from the user is provided, and the image projection mode and the illumination mode are switched based on the operation signal. According to this configuration, the projection image 14 and the central illumination light 12 are switched, so that the image projection illumination device 1 is provided in which the usage environment is expanded and the versatility is improved.

Further, according to the present embodiment, the operation signal is detected based on the captured image generated by the camera 8. According to this configuration, the user can operate the image projection illumination device 1 without touching the device body, so that the image projection illumination device 1 excellent in handling is provided.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. Note that, in the following, in principle, the description of the same parts as those in the first embodiment will be omitted. In the present embodiment, a combination of the shape of the image projection area 12a and the shape of the image peripheral area 11a illuminated by the peripheral illumination light 11 will be described. FIG. 10 is a diagram showing an example of a combination of the shape of the image projection area and the shape of the image peripheral area according to the second embodiment of the present invention. Although the boundaries between the image peripheral area 11a and the image projection area 12a are clearly shown in FIG. 10, the boundaries are blurred as necessary so that the illuminance between the image peripheral area 11a and the image projection area 12a is reduced. The peripheral illumination light 11 may be subjected to light distribution control so as to change smoothly. For example, the peripheral illumination light 11 may be light distribution controlled so that the illuminance is smoothly attenuated toward the image projection area 12a. Further, no contour or boundary may be formed outside the video peripheral area 11a. For example, the peripheral illumination light 11 may be light distribution controlled so as to illuminate a wide range of areas such as a wall and a ceiling. Further, in FIG. 10, the display range of the projected image 14 is shown by a dotted rectangle. As shown in FIG. 10, since the projected image 14 and the image peripheral area 11a do not overlap, a bright viewing environment can be provided while displaying the image with high contrast. As a result, the user can freely perform activities even while watching the video.

FIG. 10A shows a combination in which the outer contour of the image peripheral area 11a is circular in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area 11a is circular in plan view. .. FIG. 10B shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is circular in plan view. .. FIG. 10C shows a combination in which the outer contour of the video peripheral area 11a is rectangular in plan view and the contour of the video projection area 12a, that is, the inner contour of the video peripheral area is circular in plan view. FIG. 10D shows a combination in which the outer contour of the image peripheral area 11a is circular in plan view, and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is elliptical in plan view. .. FIG. 10E shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is elliptical in plan view. There is. FIG. 10F shows a combination in which the outer contour of the video peripheral area 11a is rectangular in plan view and the contour of the video projection area 12a, that is, the inner contour of the video peripheral area is elliptical in plan view. There is. FIG. 10G shows a combination in which the outer contour of the image peripheral area 11a is circular in plan view, and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is rectangular in plan view. FIG. 10H shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view, and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is rectangular in plan view. .. FIG. 10I shows a combination in which the outer contour of the image peripheral area 11a is rectangular in plan view, and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is rectangular in plan view.

First, the outer contour of the video peripheral area 11a will be described. As shown in FIGS. 10A, 10D, and 10G, when the outer contour of the image peripheral area 11a is circular, the image projection illumination device 1 emits illumination light in a circular shape. It is possible to give the user an impression similar to that of a general lighting device.

Further, as shown in FIGS. 10B, 10E, and 10H, when the outer contour of the image peripheral region 11a is elliptical, the projected image 14 and the image peripheral region 11 are illustrated. Since the shape is wide in the lateral direction, it is possible to balance the shape of the projected image and the shape of the peripheral illumination light 11 while giving the user an impression similar to a general lighting fixture.

Further, as shown in FIGS. 10(c), 10(f), and 10(i), when the outer contour of the image peripheral area 11a is a rectangle, for example, a plurality of image projection illumination devices 1 are linked. And the borders of the adjacent video peripheral areas 11a are combined without excess or deficiency. Thereby, the plurality of video projection illumination devices 1 function as a larger illumination device or a video projection device. In the vicinity of the boundary between the image peripheral regions 11a, the illuminance distribution of the peripheral illumination light 11 may be smoothly attenuated toward the outside, and the adjacent image peripheral regions 11a may be overlapped. As a result, the boundary between the adjacent video peripheral areas 11a becomes inconspicuous.

Next, the inner contour of the video peripheral area 11a will be described. As shown in FIGS. 10A, 10B, and 10C, when the inner contour of the image peripheral area 11a is circular, the contour of the image projection area 12a has symmetry. It is possible to project an image regardless of the direction of the image projection illumination device 1, without giving the user a feeling of strangeness.

Further, as shown in FIGS. 10D, 10E, and 10F, when the inner contour of the image peripheral region 11a is elliptical, the rectangular projection image 14 and the image peripheral region 11a are It becomes possible to balance the aspect ratio between the two. For example, if the aspect ratio of the projected image 14 is 16:9 and the ratio of the horizontal direction to the vertical direction of the image projected region 12a is 16:9, the distance between the projected image 14 and the boundary between the projected image region 12a. Is small, and the user can be given the impression that the projected image 14 and the ambient lighting 11 are well balanced.

Further, as shown in FIGS. 10(g), 10(h), and 10(i), when the inner contour of the image peripheral area 11a is rectangular, the rectangular projection image 14 is displayed in the image projection area 12a. In this case, the projection image 14 and the ambient lighting 11 can be balanced. In particular, as shown in FIG. 10(i), when the inner contours of the projected image 14 and the image peripheral region 11a are both rectangular, the region between the projected image 14 and the image peripheral region 11a is a so-called frame. A design that will be provided is provided. Further, when the projection image 14 is displayed in the entire projection image region 12a, it is possible to illuminate the periphery of the projection image region 12a without a gap while a high-contrast image is projected in the entire region.

The brightness of the peripheral illumination light 11 may be equal to the brightness of the image light 4. With such an illumination method, it is possible to suppress the difference between the luminance of the image viewed by the user and the illuminance of the image peripheral area 11a, that is, the illuminance of the background visual field. This reduces fatigue caused by viewing the projected image 14 for a long time.

Further, when the image projection illumination device 1 is used in consideration of workability at hand, it is desirable that the illuminance of the peripheral illumination light 11 near the image peripheral region 11a is, for example, 300 lux or more.

Further, a design with a sense of unity may be provided by reducing the distance between the projected image 14 and the inner boundary of the image peripheral region 11a. Alternatively, a design may be provided in which the distance between the projected image 14 and the inner boundary of the image peripheral region 11a is increased to make the projected image 14 stand out.

Further, the width from the inner boundary to the outer boundary of the video peripheral area 11a may be wide or narrow. If the width of the image peripheral area 11a is wide, the peripheral illumination light 11 having an impression of a general lighting fixture is provided. On the other hand, if the width of the image peripheral region 11a is narrow, the illuminance of the image peripheral region 11a can be increased even when the amount of light flux emitted from the light source 5 is constant, compared to the case where the width is wide. As a result, the illuminance can be improved while suppressing the power consumption.

Next, a method of making the inner contour and the outer contour of the image peripheral area 11a different will be described. Here, taking the case of FIG. 10(g) as an example, a method will be described in which the inner contour of the video peripheral area 11a is rectangular and the outer contour of the video peripheral area 11a is circular. 11: is a figure which shows an example of a structure of the peripheral illumination part and central illumination part which concern on Embodiment 2 of this invention. FIG. 11A is a plan view showing an example of the configuration of the peripheral illumination section 21 and the central illumination section 22. FIG. 11B is a cross-sectional view showing an example of the configuration of the peripheral illumination section 21 and the central illumination section 22. FIG. 11C is a diagram showing how light distribution is controlled in the peripheral illumination unit 21.

For example, as shown in FIG. 11A, the plurality of light sources 5 forming the peripheral illumination unit 21 are arranged in a rectangular shape on the outer periphery in a plan view seen from the emission side. The peripheral illumination light distribution control unit 6a, which is the light distribution control unit 6 of the peripheral illumination unit 21, is configured such that the curvature becomes smaller as the distance from the image projection unit 7 increases, as shown in FIG. 11B, for example. .. That is, the peripheral illumination light distribution control unit 6a is configured such that the lens effect is strong on the side of the image projection unit 7 and weak on the side opposite to the image projection unit 7. As a result, the light flux passing through the peripheral illumination light distribution control unit 6a on the image projection unit 7 side (the center side of the image projection illumination device 1) is greatly affected by the light distribution control, as shown in FIG. 11C, for example. Divergence is suppressed because it receives. On the other hand, the luminous flux passing through the peripheral illumination light distribution control unit 6a on the side opposite to the image projection unit 7 side (outside the image projection illumination device 1) is, for example, as shown in FIG. Since the influence of the control is small, it is more divergent than the light beam on the image projection unit 7 side. Therefore, the inner contour of the image peripheral area 11 a has a shape close to a rectangle according to the arrangement of the light sources 5. On the other hand, the outer contour of the image peripheral area 11a has a shape close to the light distribution of the light source 5. That is, the outer contour of the video peripheral area 11a has a shape close to a circle.

According to this configuration, the peripheral illumination unit 21 is provided that can illuminate by using the light source 5 for one row so that the shape of the inner contour and the shape of the outer contour of the image peripheral area 11a are different. It Further, according to this configuration, the shape of the outer contour of the image peripheral area 11a can be made into a shape close to a circle regardless of the arrangement shape of the light source 5.

As for the central illumination unit 22, for example, as shown in FIG. 11B, the central illumination light distribution control unit 6b of the light distribution control unit 6 controls the lens so as to suppress the divergence of the luminous flux of the light source 5 on the inner circumference. It may be configured to have an effect. Although FIG. 11 shows an example of a method of making the inner contour and the outer contour of the image peripheral area 11a different, for example, the curvatures of the peripheral illumination light distribution control unit 6a and the central illumination light distribution control unit 6b, A desired illuminance distribution shape can be obtained by appropriately changing the positional relationship between the light source 5, the peripheral illumination light distribution control unit 6a, and the central illumination light distribution control unit 6b.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. Note that, in the following, in principle, the description of the same parts as those in the first and second embodiments will be omitted. In the present embodiment, a case will be described in which the projected image 14 and the peripheral illumination light 11 are linked to perform image control. FIG. 12 is a diagram showing an example of a combination of a projected image and ambient illumination light according to the third embodiment of the present invention. The projection image 14 is projected over the image projection area 12a and the image peripheral area 11a as shown in FIG. 12, for example. As a result, the peripheral edge portion of the projected image 14 overlaps the image peripheral region 11a, so that the projected image 14 and the peripheral illumination light 11 cooperate to perform image control.

Note that, in FIG. 12 as well, the boundaries between the image peripheral area 11a and the image projection area 12a are clearly shown, but the boundaries may be blurred as necessary to set the illuminance between the image peripheral area 11a and the image projection area 12a. The peripheral illumination light 11 may be light distribution-controlled so that the brightness changes smoothly. For example, the peripheral illumination light 11 may be light distribution controlled so as to be smoothly attenuated toward the image projection area 12a. Further, no contour or boundary may be formed outside the video peripheral area 11a. For example, the peripheral illumination light 11 may be light distribution controlled so as to illuminate a wide range of areas such as a wall and a ceiling. Further, although the projected image 14 is shown as a horizontally long rectangle in FIG. 12, it may be, for example, a circle, an ellipse, or the like.

FIG. 12A shows a combination in which the outer contour of the image peripheral area 11a is circular in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area 11a is circular in plan view. .. FIG. 12B shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is circular in plan view. .. FIG. 12C shows a combination in which the outer contour of the image peripheral area 11a is rectangular in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area 11a is circular in plan view. .. FIG. 12D shows a combination in which the outer contour of the video peripheral area 11a is circular in plan view and the contour of the video projection area 12a, that is, the inner contour of the video peripheral area is elliptical in plan view. .. FIG. 12E shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is elliptical in plan view. There is. FIG. 12F shows a combination in which the outer contour of the image peripheral area 11a is rectangular in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is elliptical in plan view. .. FIG. 12G shows a combination in which the outer contour of the image peripheral area 11a is circular in plan view and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is rectangular in plan view. FIG. 12H shows a combination in which the outer contour of the image peripheral area 11a is elliptical in plan view, and the contour of the image projection area 12a, that is, the inner contour of the image peripheral area is rectangular in plan view. .. FIG. 12( i) shows a combination in which the outer contour of the image peripheral area 11 a is rectangular in plan view, and the contour of the image projection area 12 a, that is, the inner contour of the image peripheral area is rectangular in plan view.

According to these configurations, the contrast of the projected image does not deteriorate inside the image projection region 12a, and the peripheral portion of the projected image 14 and the peripheral illumination light 11 overlap each other in the image peripheral region 11a. By the cooperative control of 1., the image projection apparatus 10 capable of integrating the illumination and the image is provided.

First, as shown in FIGS. 12(a), 12(b), and 12(c), when the inner contour of the image peripheral area 11a is circular, the projection image 14 is projected in the circular image projection area 12a. Maintains high contrast. Therefore, in this case, for example, a circular image is preferably projected. As a result, the width of the ring-shaped area where the projected image 14 and the peripheral illumination light 11 overlap is substantially constant over the entire circumference, so that the balance between the high-contrast area and the low-contrast area can be substantially constant. It will be possible. Therefore, in the area where the projected image 14 and the peripheral illumination light 11 overlap each other, the peripheral illumination light 11 and the projected image 14 can be integrally expressed by image control.

Further, as shown in FIG. 12D, FIG. 12E, and FIG. 12F, when the inner contour of the video peripheral area 11a is elliptical, the aspect ratio of the rectangular projection video 14 and the projection The aspect ratio of the area where the image 14 and the peripheral illumination light 11 overlap can be balanced. For example, if the aspect ratio of the projected image 14 is 16:9, and the ratio of the horizontal direction to the vertical direction of the image projected region 12a is 16:9, the boundary between the periphery of the projected image 14 and the image projected region 12a. Since the change in the distance is small, it is possible to give the user the impression that the high contrast area and the low contrast area are well balanced.

Further, as shown in FIGS. 12(g), 12(h), and 12(i), when the inner contour of the image peripheral area 11a is rectangular, when the rectangular projection image 14 is displayed, It is possible to make the width of the area overlapping the peripheral illumination light 11, that is, the area for controlling the image substantially constant over the entire circumference. Therefore, a design in which the shape of the projected image 14 and the shape of the peripheral illumination light 11 are balanced is provided.

Next, as another example of performing image control by linking the projected image 14 and the peripheral illumination light 11, a case where auxiliary illumination light is emitted near the boundary between the projected image 14 and the image peripheral region 11a explain. FIG. 13 is a diagram showing an example of a form of auxiliary illumination light according to the third embodiment of the present invention. FIG. 13A is a diagram showing the relationship among the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15. FIG. 13B is a diagram showing the illuminance distributions of the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15. FIG. 13C is a diagram showing an illuminance distribution obtained by superimposing the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15. In FIG. 13A, the image light 4 and the auxiliary illumination light 15 are shown by broken lines, and the peripheral illumination light 11 is shown by solid lines. Further, in FIG. 13B, the illuminance distribution by the image light 4 and the auxiliary illumination light 15 is shown by a broken line, the shaded portion is the illuminance distribution by the image light 4, and the other portions are the illuminance distribution by the auxiliary illumination light 15. .. In FIG. 13B, the illuminance distribution of the peripheral illumination light 11 is shown by a solid line. The shape of the illuminance distribution may be read as the shape of the luminance distribution depending on the optical characteristics of the projection destination and the viewing direction of the user.

The auxiliary illumination light 15 adjusts the brightness of the image projected on the image projection area 12a and the illuminance of the image peripheral area 11a. For example, as shown in FIG. 13A, the image projection unit 7 emits a light flux in which the arbitrary image light 4 and the illumination correction light 15 are combined. For example, as shown in FIG. 13B, the image projection unit 7 corrects the illumination correction light that cancels the attenuation of the area where the illuminance of the peripheral illumination light 11 attenuates toward the inside (the projection image 14 side). 15 is emitted together with the image light 4. Then, as shown in FIG. 13C, a substantially uniform illuminance distribution is obtained from the image light 4 toward the peripheral illumination light 11.

According to the present embodiment, since the illuminance difference between the image light 4 and the peripheral illumination light 11 is suppressed, the peripheral illumination light 11 and the projected image 14 are integrated, and the image is projected in the peripheral illumination light 11. It is possible to express the image as if it were present.

FIG. 14 is a diagram showing another example of image control using auxiliary illumination light according to the third embodiment of the present invention. In FIG. 14A, the illuminance distributions when the peripheral illumination light 11 and the image light 4 are separated and the auxiliary illumination light 15 smoothly attenuates from the peripheral illumination light 11 toward the image light 4 are shown. Has been done. FIG. 14B shows an illuminance distribution obtained by superimposing the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15 in FIG. 14A.

According to such an illuminance distribution, as shown in FIG. 14B, the illuminance distribution when the peripheral illumination light 11 and the illumination correction light 15 are superposed is attenuated exponentially toward the center. ing. In general, how the human eyes perceive brightness depends on a logarithm. Therefore, as shown in FIG. 14B, if the illuminance is exponentially attenuated, it seems that the illuminance is smoothly decreased. felt. Therefore, it is possible to project the peripheral illumination light 11 having an illuminance distribution that naturally and smoothly decreases and an arbitrary image in the interior with high contrast.

In FIG. 14C, the peripheral illumination light 11 and the image light 4 are separated from each other, the image light 4 is smoothly attenuated toward the periphery (toward the peripheral illumination light 11), and the auxiliary illumination light 15 is peripheral illumination. The respective illuminance distributions when the light 11 is smoothly attenuated toward the image light 4 are shown. FIG. 14D shows an illuminance distribution obtained by superimposing the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15 in FIG. 14C.

Such an illuminance distribution provides an image in which the peripheral illumination light 11 is once darkened toward the center, and the image fades in from the darkened area toward the center.

In FIG. 14E, the peripheral illumination light 11 and the image light 4 overlap at the peripheral edge of the projected image 14, the image light 4 is smoothly attenuated toward the peripheral illumination light 4, and the auxiliary illumination light 15 is the image light 4. The respective illuminance distributions in the case of smoothly attenuating toward the center side of are shown. FIG. 14F shows an illuminance distribution obtained by superimposing the peripheral illumination light 11, the image light 4, and the auxiliary illumination light 15 in FIG. 14E.

According to such an illuminance distribution, while the peripheral illumination light 11 is gradually darkened toward the center, the image fades in from the region where the image is dark so that the image is merged into the peripheral illumination light 11. A moving image is provided.

FIG. 14G shows the respective illuminance distributions when the peripheral illumination light 11 and the image light 4 overlap each other at the peripheral edge of the projected image 14 and the image light 4 is strong in the area where these overlap. There is. In addition, in FIG. 14G, the auxiliary illumination light 15 is not emitted. FIG. 14H shows an illuminance distribution in which the peripheral illumination light 11 and the image light 4 in FIG.

According to such an illuminance distribution, the image of the area overlapping the peripheral illumination light 11 is emphasized, so that the contrast reduction and the color shift due to the peripheral illumination light 11 can be suppressed.

(Embodiment 4)
Next, a fourth embodiment of the invention will be described. Note that, in the following, in principle, the description of the same parts as those in the first to third embodiments will be omitted. In the present embodiment, an example of light distribution control of peripheral illumination light will be described. FIG. 15 is a diagram showing an example of a video projection lighting device according to Embodiment 4 of the present invention. FIG. 15A is a perspective view of the image projection illumination device, and FIG. 15B is a sectional view of the image projection illumination device. In addition, in FIG. 15B, the cross-sectional shape near the light source 405 is shown, and the positional relationship between the light source 405 and the image projection unit 7 is shown. In addition, in FIG.15(b), the central illumination part 6 shown in FIG.1(b) is abbreviate|omitted.

The image projection lighting device 401 includes a housing 410. The housing 410 is formed in a truncated pyramid shape such as a truncated hexagonal pyramid as shown in FIG. Note that the housing 410 may be configured, for example, in a cylindrical shape or a truncated cone shape. A light source 405 is provided on the side wall 451 of the housing 410. Specifically, the light source 405 is arranged on the outer surface of the housing 410, as shown in, for example, FIGS. Therefore, the light flux of the light source 405 is emitted toward the outside of the housing 410. The side wall 451 of the housing 410 may be made of the same material as that of the light source substrate 51 shown in FIG. 1, for example. In this case, the side wall 451 also functions as a light source substrate of the light source 405. Further, in the example of FIG. 15, the light source 405 is not provided with a light distribution control unit, and the plurality of light sources 405 configure the peripheral illumination unit 421.

The light source 405 is composed of, for example, an LED that emits Lambertian light, similar to the light source 5 shown in FIG. A Lambertian light source has a property that it emits the strongest light in the direction normal to the emission surface and the weakest light in the direction parallel to the light emission surface. By utilizing this property, it is possible to prevent the peripheral illumination light 11 from being emitted to the image projection area 12a by adjusting the angle of the light emitting surface of the light source 5. For example, as shown in FIG. 15B, if the angle of the light emitting surface of the light source 405 is adjusted to be parallel to the irradiation angle of the image light 4 by the image projection unit 7, the image light 4 and the peripheral illumination light. A light distribution that does not overlap 411 is realized.

According to this configuration, the peripheral illumination section 421 can illuminate not only the periphery of the projected image but also the wall, ceiling, etc. around the image projection illumination device 401 over a wide range.

(Embodiment 5)
Next, a fifth embodiment of the invention will be described. In the following, in principle, the description of the same parts as those in the first to fourth embodiments will be omitted. In the present embodiment, a modified example of the light distribution control unit 6 shown in FIG. 1 will be described. FIG. 16 is a sectional view showing a modified example of the light distribution control unit according to the fifth embodiment of the present invention. FIG. 16A shows a peripheral illumination light distribution control unit having a concave portion on the incident surface. In this configuration, the peripheral illumination light distribution control unit 506a is provided with the recess 516a in the incident surface 6c. The recess 516a is provided so as to be within the range of the protrusion 517a of the peripheral illumination light distribution control unit 506a in plan view. The recess 516a is configured to surround the emission surface of the light source 5. Further, the peripheral illumination light distribution control unit 506a is provided so that the emission surface of the light source 5 is arranged inside the recess 516a. The recess 516a is provided, for example, so that its central axis coincides with the optical axis of the light source 5. Further, the concave portion 516a is provided so that its central axis is inside the central axis of the convex portion 517a, that is, on the image projection unit 7 side.

According to this configuration, the emitted light flux that enters the peripheral illumination light distribution control unit 506a is refracted in the concave portion 516a toward the convex portion 517a. Therefore, the peripheral illumination light distribution control unit 506a is not provided with the concave portion 516a. By comparison, a larger amount of light flux is condensed, and highly efficient light distribution control becomes possible. In addition, since the emission surface of the light source 5 is provided in the recess 516a, the luminous flux emitted in the surface direction of the emission surface is controlled, so that highly efficient light distribution control is possible.

Further, it is desirable that the concave portion 516a is configured so that the light flux in the surface direction of the emission surface of the light source 5 is incident on the convex portion 517a. According to this configuration, the luminous flux in the surface direction is also subjected to the light distribution control and used as the peripheral illumination light, so that the light distribution control with higher efficiency becomes possible.

Further, the peripheral illumination light distribution control unit 506a may be provided with a diffusion surface or a light shielding surface for preventing stray light in a region other than the concave portion 516a on the incident side or a region other than the convex portion 517a on the emitting side. This suppresses the generation of bright lines and shadows in the ambient illumination light 11 and provides high-quality ambient illumination light 11.

FIG. 16B shows a peripheral illumination light distribution control unit using multiple reflection. The peripheral illumination light distribution control unit 506b in FIG. 16B is configured to have a larger curvature than the peripheral illumination light distribution control unit 6a illustrated in FIG. Therefore, a part of the light flux emitted from the light source 5 undergoes total reflection twice on the wall surface inside the convex portion 517b, and is emitted in the direction opposite to the emission direction of the light source 5. For example, the light flux emitted in the direction perpendicular to the emission surface of the light source 5 is emitted in the direction opposite to the emission direction of the light source 5 due to the total reflection inside the convex portion 517b.

According to this configuration, since the light flux from the light source 5 is emitted toward the rear of the light source 5 by total reflection, the ceiling, the wall, the inside of the appliance, or the like in a direction different from the projection direction of the image is illuminated. .. Further, according to this configuration, the light flux is emitted in the direction in which strong light emission is desired without changing the arrangement of the light source 5. Further, this reduces the number of parts for changing the direction of the light flux. Further, according to this configuration, there are light fluxes emitted to the publication by total reflection and light fluxes transmitted and refracted by the convex portions 517b and emitted to the image projection side, so that various light distributions are realized. ..

FIG. 16C shows a peripheral illumination light distribution control unit using total reflection. The peripheral illumination light distribution control unit 506c in FIG. 16C is made of, for example, a transparent material. In the peripheral illumination light distribution control unit 506c, a part of the light flux emitted from the light source 5 is totally reflected by the wall surface 517c, and emitted from the wall surface 518c to the outside. For example, the light flux emitted in the direction perpendicular to the emission surface of the light source 5 is reflected by the wall surface 517c and emitted from the wall surface 518c to the outside.

According to this configuration, the emission direction can be changed to a greater extent than in the method using refraction, so that the peripheral illumination light 11 is emitted in a wider range. Further, since the light flux emitted from the light source 5 is totally reflected on the wall surface 517c, the light distribution control is performed with higher efficiency than using a reflection film that generally absorbs a part of the light.

FIG. 16D shows another example of the peripheral illumination light distribution control unit using reflection. The peripheral illumination light distribution control unit 506d is composed of a structure having a reflecting surface. The peripheral illumination light distribution control unit 506d is made of, for example, an opaque and highly rigid metal or resin. In addition, the peripheral illumination light distribution control unit 506d may include a reflector 518d and a support 517d that supports the reflector 518d, as shown in FIG. 16D, for example. The reflector 518d may be made of, for example, a metal such as a mirror that performs specular reflection, a dielectric multilayer film, or the like. Specifically, the reflector 518d may be formed on the support 517d by metal vapor deposition, or may be formed by attaching a reflection film to the support 517d, for example. Further, the reflector 518d may have a rough surface having diffusivity or a reflecting surface for scattering and reflecting, if necessary. The angle at which the outgoing direction of the light beam is bent can be changed more largely by reflection than by refraction. When the emission direction of the light flux from the light source 5 is largely changed, it is effective to use reflection in the light distribution control unit 6 as shown in FIGS. 16(c) and 16(d), for example.

Further, the peripheral illumination light distribution control unit 506d may be configured by combining with a transparent resin. According to this configuration, since the luminous flux emitted from the light source 5 is controlled even in the portion made of the transparent resin, various light distributions are realized. Further, the peripheral illumination light distribution control unit 506d may be integrally molded with a portion having the reflector 518d and a transparent portion. With this configuration, the assembling property of the peripheral illumination light distribution control unit 506d is improved.

FIG. 16D shows an example in which the cross-sectional shape is a paraboloid, the central axis of which passes through the center of the light emitting surface of the light source 5, and the light source 5 is located near the focal point of the paraboloid. There is. According to this configuration, the light flux is emitted in a direction substantially parallel to the central axis of the parabolic surface indicated by the alternate long and short dash line, which facilitates the design of the emission direction.

Further, the divergence angle of the emitted light beam becomes wider as the light emitting surface of the light source 5 becomes larger. Further, the divergence angle of the emitted light flux becomes wider as the focal length of the paraboloid becomes shorter. When the light source 5 is displaced from the focus position, a light distribution that has a wide skirt and a wide tail is realized.

FIG. 16E shows a peripheral illumination light distribution control unit using a prism. The peripheral illumination light distribution control unit 506e includes a first peripheral illumination light distribution control unit 506f and a second peripheral illumination light distribution control unit 506g. As shown in FIG. 16E, the first peripheral illumination light distribution control unit 506f includes a concave portion 516f on the incident side and a convex portion 517f on the emission side. The first peripheral illumination light distribution control unit 506f converges the divergence of the light flux emitted from the light source 5. The concave portion 516f and the convex portion 517f are provided so that their central axes substantially coincide with the optical axis of the light source 5. Therefore, the light flux is emitted from the convex portion 517f substantially symmetrically with respect to the central axis.

The second peripheral illumination light distribution control unit 506g includes a prism 517g and the like. As shown in FIG. 16E, the prism 517g is provided so as to face the convex portion 517f of the first peripheral illumination light distribution control unit 506f. For example, as shown in FIG. 16E, the prism 517g has a short length in the central axis direction of the light source 5 and the like on the inner side (on the image projection unit 7 side) and on the outer side (on the side opposite to the image projection unit 7). It is configured to be long. The prism 517g refracts the light flux emitted from the convex portion 517f and changes the emission direction. For example, as shown in FIG. 16E, the outer prism 517g changes the emission direction of the light flux to the outside as compared with the inner prism 517g. It is desirable that the prism 517g is arranged so as to cover the existing range of the light flux emitted from the convex portion 517g.

In addition, the peripheral illumination light distribution control unit 506e may arbitrarily change the emission direction of the transmitted light flux, or may not change the emission direction while keeping the optical axis direction. In order to change the emission direction after passing through the light distribution means to the outside of the image projection device 1, the central axis of the convex portion 517f provided near the light source 5 may be shifted to the outside. On the other hand, when the outgoing light flux after passing through the light distribution control unit 6 remains unchanged in the optical axis direction, the convex portion 517f may have symmetry.

Further, since the divergence of the light flux after passing through the convex portion 517f is suppressed, the size is increased even if the first peripheral illumination light distribution control unit 506f and the second peripheral illumination light distribution control unit 506g are separated. It is possible to configure the prism 517g without using the prism. With this configuration, the function of dividing the light flux by the lens can be suppressed and the function of the prism 517g can be changed so as to change the emission direction. Therefore, the degree of freedom in design regarding light distribution control is improved.

The order of the first peripheral illumination light distribution control unit 506f and the second peripheral illumination light distribution control unit 506g may be exchanged. In other words, the prism 517g may be provided on the light source 5 side instead of the emission side. If the prism 517g is provided on the light source side, the emission direction of the light flux becomes larger.

The second peripheral illumination light distribution control unit 506g may be configured by a lens instead of the prism 517g. When a lens is used, the divergence angle of the light flux can be freely adjusted after passing through the first peripheral illumination light distribution control unit 506f, so that the light distribution can be widened or suppressed. Becomes

The first peripheral illumination light distribution control unit 506f and the second peripheral illumination light distribution control unit 506g may be connected to each other by, for example, a movable housing component, and the relative arrangement thereof may be adjusted. Good. By adjusting these relative arrangements, the light distribution can be freely changed, and the user can change the divergence angle of the emitted light beam.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described. In the following, in principle, the description of the same parts as those in the first to fifth embodiments will be omitted. In this embodiment, light distribution control using a diffusion cover will be described. FIG. 17 is a sectional view showing an example of light distribution control using the diffusion cover according to the sixth embodiment of the present invention. In FIG. 17, the left side of the image projection illumination device 601 is shown enlarged. Note that FIG. 17 illustrates a case where the peripheral illumination light distribution control unit 506d illustrated in FIG. 16D is used as the peripheral illumination unit, but the peripheral illumination light distribution control unit is, for example, FIG. It may have a configuration shown in FIG. 16C, FIG.

As shown in FIG. 17, the diffusion cover 650 is provided on the emission side of the peripheral illumination section 621. Specifically, the diffusion cover is provided so as to cover the peripheral illumination section 621 and the central illumination section 622 from the emission side of the peripheral illumination section 621 and the side surface side of the image projection illumination device 601. The diffusion cover 650 may be provided so as to be fitted into the housing 10 shown in FIG. 1, for example.

The diffusion cover 650 diffuses the peripheral illumination light 611 and the central illumination light 612. The diffusion cover 650 may be made of, for example, a material having fine particles, or may be made of a transparent material provided with a rough surface. Further, the diffusion cover 650 may be transparent. The diffusion cover 650 controls the light distribution by diffusing the emitted light flux in all directions by using fine particles, a rough surface, or the like. When the diffusion cover 650 is transmissive, the light flux incident on the diffusion cover 650 is hardly emitted to the light source 5 side.

The light flux from the light source 5 arranged on the outer periphery is reflected by the peripheral illumination light distribution control unit 506d and illuminates the diffusion cover 650 on the side surface side. The illuminated side diffusion cover 650 diffuses and transmits the incident light flux to emit light as a secondary light source. If the diffusion of the light flux is strong, the diffusion cover 650 emits light with a light distribution according to the cos law, and emits the peripheral illumination light 611. That is, in this case, the transmitted light from the diffusion cover 650 exhibits optical characteristics close to those of a surface light source that emits Lambertian light.

The light flux from the light source 5 arranged on the inner circumference illuminates the diffusion cover 650 located on the image projection side of the image projection illumination device 601. When the light source 5 on the inner circumference emits light, the diffusion cover 650 on the image projection side emits light as a secondary light source, and emits the central illumination light 612 toward the image projection area 12a.

According to this configuration, the peripheral illumination light 611 that illuminates the periphery is provided without emitting the peripheral illumination light 611 to the center side of the image projection device 601. In other words, the image projection illumination device 601 that illuminates a wide range such as a wall or a ceiling without the image projection area 12a being illuminated by the ambient illumination light 611 is provided.

In order to prevent the projection image 14 and the peripheral illumination light 11 from overlapping, the angle of the side surface of the diffusion cover 650 is adjusted so that the tangent plane extending from the side diffusion cover 650 does not intersect the projection image 14. It should have been done.

Next, light distribution control using a diffusion cover having different diffusion performances on the side surface side and the image projection side will be described. FIG. 18 is a diagram showing an example of orientation control using a diffusion cover having different diffusion performances on the side surface side and the image projection side according to the sixth embodiment of the present invention. In FIG. 18, the peripheral illumination light distribution control unit 606a and the central illumination light distribution control unit 606b of the light distribution control unit 6 project to the emission side.

In the example shown in FIG. 18, the light fluxes emitted from the peripheral illumination light distribution control unit 606a and the central illumination light distribution control unit 606b illuminate the diffusion cover 650 on the image projection side and do not illuminate the diffusion cover 650 on the side surface. Is configured.

The diffusion cover 650 is configured, for example, such that the side surface of the image projection illumination device 601 has higher diffusion performance than the image projection side. That is, the diffusion cover 650 on the side surface is provided with a larger amount of fine particles or a stronger rough surface than on the image projection side. When the diffusion performance of the diffusion cover 650 is improved, the light distribution of the light flux emitted from the diffusion cover becomes close to Lambertian emission, so that the diffusion cover 650 cannot substantially control the light distribution. However, as shown in FIG. 18, if the light distribution control unit 6 is configured so that the light flux emitted from the light sources 5 on both the outer and inner circumferences is emitted to the diffusion cover 650 on the image projection side, the diffusion performance is improved. Since the light flux is low, the diffusion of the light flux is suppressed, and the emitted light flux can be used for the peripheral illumination light and the central illumination light.

Further, the diffusion cover 650 may have a configuration in which the image projection side is removed instead of lowering the diffusion performance on the image projection side. Here, the case where the diffusion performance is different between the side surface side and the image projection side has been described, but the diffusion performance of the diffusion cover 650 may be different for each region so that a desired light distribution can be obtained. Further, the diffusion cover 650 may have a configuration in which it is transparent in a predetermined area according to the diffusion performance, or may have a configuration in which it is removed.

According to this configuration, since the diffusion cover 650 on the side surface has high diffusion performance, a design that does not show the internal structure of the image projection illumination device 601 is provided.

(Embodiment 7)
Next, a seventh embodiment of the invention will be described. In the following, in principle, the description of the same parts as those in the first to sixth embodiments will be omitted. In this embodiment, a modification of the light source will be described. FIG. 19 is a sectional view showing an example of a modification of the light source according to the seventh embodiment of the present invention. In the present embodiment, as shown in FIG. 19, light guide 752 is arranged between light source 5 and light distribution control unit 6. The light guide 752 guides the luminous flux emitted from the light source 5 to the light distribution control unit 6. The light guide 752 is disposed, for example, between the light source 5 on the outer periphery and the peripheral illumination light distribution control unit 6a, and guides the light flux emitted from the light source 5 on the outer periphery to the peripheral illumination light distribution control unit 6a. Although not shown, the light guide 752 may be arranged, for example, between the light source 5 on the inner circumference and the central illumination light distribution control unit 6b. The light guide 752 is formed in a columnar shape such as a cylindrical shape, a square pillar shape, a polygonal pillar shape, and a columnar shape.

According to this configuration, the luminous flux emitted from the light source 5 is reliably guided to the light distribution control unit 6 regardless of the distance between the light source 5 and the light distribution control unit 6, and thus the highly efficient ambient illumination light 11 and Central illumination light 12 is provided.

Further, in the light guide 752, the shape of the entrance surface 752a and the shape of the exit surface 752b may be different. For example, it is desirable that the shape of the incident surface 752 is substantially the same as the shape of the light emitting surface of the light source 5, and the shape of the emitting surface 752b is a predetermined shape that matches the shape of the light distribution control unit 6. When the light distribution control unit 6 has, for example, a structure of an imaging system such as a lens, the light distribution shape after the light emission shape of the light beam emitted from the light source 5 arranged at the focal length of the lens is subjected to the light distribution control. It has the same shape as the light distribution. Therefore, if the light guide 752 is configured in this way, it is possible to control the light distribution by the emission surface 752b of the light guide 752. If the area of the exit surface 752b of the light guide 752 is larger than the area of the entrance surface 752a, the light flux is efficiently guided to the light distribution control unit 6 by using total reflection, and highly efficient illumination light is obtained. Provided. Further, if the area of the exit surface 752b of the light guide 752 is smaller than the area of the entrance surface 752a, the divergence of the light flux is suppressed each time reflection is repeated on the side surface, so that a light flux close to parallel light is emitted.

Further, the light guide 752 may be made of, for example, a material having transparency, or the side surface thereof may be made to have a reflecting surface. When a transparent material is used, for example, fine particles for adjusting the diffusion performance may be mixed in the light guide body 752, or a rough surface is provided on the emission surface facing the light distribution control unit 6. May be. As a result, the light flux emitted from the light source 5 is scattered while being repeatedly reflected inside the light guide 752, so that the light flux is mixed inside the light guide 752. As a result, the unevenness of the illuminance distribution of the luminous flux generated on the light emitting surface of the light source 5 is eliminated. Further, as a result, the illuminance of the light flux emitted from the emission surface 752b of the light guide 752 is made uniform, and high-quality peripheral illumination light 11 and central illumination light 12 are provided.

Next, other modified examples of the light source will be described. FIG. 20 is a diagram showing another modification of the light source according to the seventh embodiment of the present invention. The light source 805 shown in FIG. 20 includes, for example, a semiconductor laser 853 and a phosphor 854. The light source 805 emits a light flux when the phosphor 854 is excited by the semiconductor laser emitted from the semiconductor laser 853. If the semiconductor laser 853 is used, the emission region of the laser can be narrowed down, and the phosphor 854 can be made small. As a result, a small area of the phosphor 854 can be made to emit light and a minute light emitting point can be created. If the light emitting point is small, the light distribution control unit 6 can easily control the light distribution, so that it is possible to downsize the optical system or the like that configures the light distribution control unit 6 and to perform more effective light distribution control.

FIG. 21 is a diagram showing another modification of the light source according to the seventh embodiment of the present invention. It is a figure which shows the other modification of a light source. Here, a case will be described in which the light emission intensity, the color, and the like of the light flux are two-dimensionally controlled in the light source. FIG. 21A is a cross-sectional view showing the positional relationship between the light source 905 and the light distribution control unit 6. FIG. 21B is a diagram showing an example of the two-dimensional modulation light emitting surface 955 of the light source 905. The light source 905 shown in FIG. 21A is composed of, for example, an OLED (Organic Light Emitting Diode). On the emission side of the light source 905, for example, as shown in FIGS. 21A and 21B, a two-dimensional modulator 955 that two-dimensionally controls the shape, emission intensity, color, etc. of the light flux emitted from the light source 905. Is provided. The two-dimensional modulator 955 controls the shape, emission intensity, color, etc. of the light flux emitted from the light source 905. In FIG. 21B, the two-dimensional modulation unit 955 is shown for the case where the light flux is emitted in the shape of an arrow, but by changing the configuration, the shape of the light flux can be adjusted arbitrarily. It is possible to In addition to the combination of the light source 905 and the two-dimensional modulator 955 described above, the light source 905 and a liquid crystal display element (not shown) may be combined in the light source portion.

With this configuration, the light emission intensity, color, and the like of the light flux are also controlled in the light source 905, so that the light distribution distribution after being emitted from the light distribution control unit 6 is dynamically controlled. Thereby, the light distribution of the illumination light can be controlled in detail.

FIG. 22 is a diagram showing another modification of the light source according to the seventh embodiment of the present invention. Here, a case where the light source is configured in an annular shape will be described. FIG. 22A is a sectional view showing the positional relationship between the light source 1005 and the light distribution control unit 6. FIG. 22B is a diagram showing the light source portion and the light distribution control unit 6 separately. The light source 1005 shown in FIG. 22 is configured in an annular shape. The light source 1005 is composed of, for example, an OLED. The light source 1005 is divided into an outer circumference and an inner circumference, for example, as shown in FIG. The light source 1005 on the outer periphery constitutes, for example, the peripheral illumination unit 11, and the light source 1005 on the inner periphery constitutes, for example, the central illumination unit 12. These light sources 1005 emit light in an annular shape. The peripheral illumination light distribution control unit 6a and the central illumination light distribution control unit 6b of the light distribution control unit 6 are formed in an annular shape according to the shape of the light source 1005, as shown in FIG. 22B, for example.

Note that FIG. 22B illustrates the case where the light sources 1005 for two rounds of the outer circumference and the inner circumference are provided, but the light source 1005 is provided for only one round, which is the minimum configuration, for example. Alternatively, three or more turns may be provided to enable finer light distribution control. For the light source 1005, for example, a light source unit in which a diffusion surface and a large number of minute light sources are combined may be used.

According to this configuration, since the light distribution in the circumferential direction has a continuous shape, the peripheral illumination light 11 and the central illumination light 12 having a smooth and high-quality light distribution are provided.

(Embodiment 8)
Next, an eighth embodiment of the present invention will be described. Note that, in the following, in principle, the description of the same parts as those in the first to seventh embodiments will be omitted. In the above embodiment, the method of detecting the operation signal from the user using the camera 8 has been described. Until now, the direction of an object such as a finger or a hand as seen from the camera 8 has been detected based on the captured image. The two-dimensional position information of the target object is acquired based on the detected direction, and the operation signal is detected based on the acquired position information. However, it is difficult to detect a more complicated operation signal with only two-dimensional position information. In detail, the direction of the user's finger viewed from the pupil position of the camera lens is specified, and the position of the object in the three-dimensional space remains arbitrary. Therefore, in this embodiment, a method of acquiring three-dimensional position information will be described.

FIG. 23 is a diagram showing an example of a method of acquiring three-dimensional position information according to the eighth embodiment of the present invention. In the present embodiment, for example, illumination control is performed such that the plurality of light sources 5 such as the light sources 5A and 5B (some light sources) are sequentially emitted. The camera 8 photographs the object and the shadow of the object when the individual light sources 5 (5A, 5B, etc.) emit light. In this way, the camera 8 generates a plurality of captured images corresponding to the plurality of light sources 5. From each captured image, the shadow of the object is extracted after the direction of the object viewed from the camera 8 is specified, because the extracted shadow is generated by the illumination light from the light source 5 that is turned on. , Appears on the extension line connecting the emission position of the illumination light and the object, whereby the direction of the object seen from the camera 8 (first direction) and the object seen from the emission position of the illumination light. The direction is detected, and the three-dimensional position information of the object is acquired by calculating the intersection of these two directions. Therefore, the variation of the operation signal can be increased.

The camera 8 may generate a captured image corresponding to each light source 5 by sequentially illuminating each light source 5. With this, a plurality of directions of the object viewed from the emission position of the illumination light are detected, so that the detection accuracy of the three-dimensional position information can be improved.

Here, the method of acquiring the three-dimensional position information has been described by exemplifying the user's finger or hand as the object. However, the target object for acquiring the position information is not limited to these, and may be, for example, a rod-shaped object.

In addition, it is desirable that the light source 5 be switched at high speed so as not to cause flicker to human eyes. For example, if the light source 5 is switched at a frequency of 180 Hz or higher, it is difficult for the human eye to see it. Therefore, it is desirable to switch the light source 5 at a frequency higher than that.

Further, for example, a light source that emits invisible light having a wavelength band in the invisible region such as infrared light (hereinafter, also referred to as an invisible light source) may be separately provided for detecting the position of the object. Even if the invisible light is emitted so as to overlap the projection image 14, the contrast of the projection image 14 is not reduced. According to this configuration, it is possible to sequentially turn on the invisible light source without making the human eyes perceive flicker regardless of the lighting cycle. Further, since the light source 5 that emits the illumination light and the light source that emits the invisible light source are used at the same time, the three-dimensional position information of the object can be acquired without affecting the illumination light.

The invisible light source may also be configured to illuminate a wider area. Thereby, the acquisition range of three-dimensional position information is expanded.

When the output of the invisible light source is weak, a light distribution control unit corresponding to the invisible light source may be separately provided. The divergence of invisible light is suppressed, the irradiation energy density can be increased, and the shadow can be highlighted, and the detection accuracy of three-dimensional position information can be improved.

(Embodiment 9)
Next, a ninth embodiment of the invention will be described. Note that, in the following, in principle, the description of the same parts as those in the first to eighth embodiments will be omitted. In the above-described embodiment, the case where the luminous flux emitted from the light sources arranged in the annular shape is controlled in the radial direction of the annular shape, for example, has been described. On the other hand, in the present embodiment, a case will be described where the luminous flux emitted from the light source is controlled in the circumferential direction of the ring. 24: is a figure which shows the example of a structure of the light distribution control part which concerns on Embodiment 9 of this invention. FIG. 24A is a plan view of the light distribution control unit viewed from the emission side. FIG. 24B is a diagram showing an example of the configuration of the light distribution control unit, in which the left side in the drawing is an enlarged plan view and the right side in the drawing is an enlarged sectional view. FIG. 24C is a diagram showing another example of the configuration of the light distribution control unit, in which the left side in the drawing is an enlarged plan view and the right side in the drawing is an enlarged sectional view.

The light distribution control unit 1106 is provided for each light source 5, for example, as shown in FIG. Each of the orientation control units 1106 is formed in a substantially rectangular shape in a plan view, as shown in FIGS. 24(a) and 24(b), for example.

According to this configuration, the light distribution control unit 1106 can control the divergence of the light flux emitted from the light source 5 into a rectangular shape. As a result, the light distribution control unit 1106 is provided with the image projection illumination device 1101 capable of controlling the light flux emitted from the light source 5 in the circumferential direction of the ring.

Further, the light distribution control unit 1106 may include, for example, an aspherical lens and have an optical function in which spherical aberration is suppressed. Further, the light distribution control unit 1106 may be configured by a free-form surface lens, and may be configured to adjust not only the spherical aberration but also the light distribution of the light flux in the circumferential direction and the radial direction.

Further, the light source 5 of the image projection illumination device 1101 may be configured to be individually turned on/off. For example, the control unit 110 individually controls ON/OFF of the light source 5. This provides the image projection illumination device 1101 that is capable of performing more complicated light distribution control by combining a region illuminated with the illumination light and a region not illuminated with the illumination light.

Further, for example, as shown in FIG. 24C, a light flux adjusting member 1156 that adjusts the shape of the light flux emitted from the light source 5 may be provided between the light source 5 and the light distribution control unit 1106. .. The light flux adjusting member 1156 is made of a material having a light blocking property or a reflective property. As shown in FIG. 24C, the light flux adjusting member 1156 has an opening 1156a formed in a region facing the light source 5, and the shape of the light flux from the light source 5 is adjusted by the opening 1156a. The light is emitted to the light distribution control unit 1106.

According to this configuration, since the shape of the light flux emitted from the light source 5 is adjusted by the light flux adjusting member 1156, a desired light distribution can be obtained regardless of the shape of the light emitting surface of the light source 5. Further, the light distribution control in the light distribution control unit 1106 is performed with high accuracy.

Further, as shown in FIG. 24C, a protective plate 1157 may be provided between the light source 5 and the light flux adjusting member 1156. The protective plate 1157 can prevent, for example, the light flux adjusting member 1156 from being damaged. Further, the protection plate 1157 may be made of, for example, an insulating material. This can prevent electric shock from the light source 5 and the light flux adjusting member 1156. The order of the light flux adjusting member 1156 and the protective plate 1157 may be exchanged with each other.

The light flux adjusting member 1156 and the protective plate 1157 may be integrally formed. This reduces the manufacturing costs of the light flux adjusting member 1156 and the protective plate 1157.

The light flux adjusting member 1156 may be formed on the protective plate 1157 by printing, for example. As a result, since the light flux adjusting member 1156 is formed with higher accuracy than general machining, it is possible to perform precise light distribution control.

Further, in FIG. 24A, an example in which the light sources 5 are arranged in two rows is shown, but as a minimum necessary configuration, only one row may be arranged, for example, three rows or more are provided. May be. Further, the arrangement of the light sources 5 is not limited to the concentric circular shape (annular shape) in plan view, and may be, for example, a rectangular shape or another shape.

FIG. 25 is a diagram showing an example of an illuminance distribution when a plurality of image projection illumination devices according to Embodiment 9 of the present invention are used side by side. When a plurality of image projection devices 1101 shown in FIG. 24A are arranged side by side, a plurality of image lights 4A and 4B are connected to provide one large image.

At this time, the peripheral illumination light of the one image display illumination device 1101 that emits the image light 4A is 1111A. As shown in FIG. 25, the peripheral illumination light 1111A does not overlap the image light 4A, but overlaps the image light 4B emitted from the other image projection illumination device 1101.

Therefore, one image display lighting device 1101 that emits the image light 4A is provided with, for example, the light source 5 that illuminates the peripheral illumination light 1111A in a region overlapping the image peripheral region 11B and the image projection region 12B of the other image projection illumination device 1101. It is turned off so that the peripheral illumination light 1111A does not overlap the image light 4B and the peripheral illumination light 1111B. Similarly, the other image display illumination device 1101 that emits the image light 4B illuminates the peripheral illumination light 1111B in a region overlapping with the image peripheral region 11A and the image projection region 12A of the one image projection illumination device 1101, for example. The light source 5 is turned off so that the peripheral illumination light 1111B does not overlap the image light 4A and the peripheral illumination light 1111A. For example, the control unit 110 performs such ON/OFF switching of the light source 5.

According to this configuration, since the peripheral illumination lights 1111A and 1111B are controlled to be divided in the circumferential direction, the plurality of image lights 4A and 4B emitted from the plurality of image projection illumination devices 1101 are combined to form one larger projected image. Will be provided. Further, according to this configuration, the peripheral illumination lights 1111A and 1111B of the plurality of image projection illumination devices 1101 provide one larger peripheral illumination light that surrounds one large projected image. Also, a high contrast, larger projected image and a wider range of ambient illumination light are simultaneously provided.

In addition, although the case where two video projection illumination devices 1101 are used has been described here, more video projection illumination devices 1101 may be used. According to this configuration, one larger projection image is projected. Also, a larger single ambient illumination light surrounding a single larger projected image is provided.

Although the invention made by the inventor has been specifically described based on the embodiment of the invention, the invention is not limited to the embodiment of the invention, and various modifications are made without departing from the scope of the invention. It goes without saying that it is possible.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are included. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.

Further, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. .. Further, with respect to a part of the configuration of each embodiment, other configurations can be added, deleted, or replaced. It should be noted that each member and relative size described in the drawings are simplified and idealized in order to explain the present invention in an easy-to-understand manner, and may have a more complicated shape in mounting.

DESCRIPTION OF SYMBOLS 1... Image projection illumination device, 4... Image light, 5... Light source, 6... Light distribution control unit, 6a... Peripheral illumination light distribution control unit, 6b... Central illumination light distribution control unit, 7... Image projection unit, 8... Camera (Imaging unit), 9... Environment sensor, 11... Peripheral illumination light, 11a... Peripheral illumination area (second area), 12... Central illumination light, 12a... Image projection area (first area), 14... Projected image , 15... Auxiliary illumination light, 21... Peripheral illumination section, 22... Central illumination section, 101... Operation input section, 110... Control section, 650... Diffusion cover, 752... Light guide, 853... Semiconductor laser, 854... Phosphor , 955... Two-dimensional modulator

Claims (15)

An image projection unit that projects an image on the first region,
A peripheral illumination unit that emits a luminous flux of peripheral illumination light that illuminates a second region that surrounds the first region;
Equipped with
The image projection unit emits auxiliary illumination light that adjusts the illuminance of the image projected on the first region and the illuminance of the peripheral illumination light illuminated on the second region,
Video projection lighting device. An image projection unit that projects an image on the first region,
A peripheral illumination unit that emits a luminous flux of peripheral illumination light that illuminates a second region that surrounds the first region;
A central illumination unit that emits a luminous flux of central illumination light that illuminates the first region,
An imaging unit that generates a captured image of the target;
And a control unit,
The control unit detects an operation signal from a user based on the captured image of the target object generated by the imaging unit, and based on the detected operation signal, the peripheral illumination light by the peripheral illumination unit. A second mode in which the first illumination mode and the projection of the image are simultaneously performed, and the ambient illumination section emits the peripheral illumination light and the central illumination section emits the central illumination light. To switch between and
In the peripheral illumination unit and the central illumination unit, a plurality of light sources are arranged so as to surround the image projection unit in plan view,
While the part of the light source emits the light flux, the imaging unit generates the captured image of the object,
The control unit detects a first direction that is the direction of the object viewed from the image capturing unit based on the captured image, extracts a shadow of the object based on the captured image, and outputs the shadow to the shadow. Based on the first direction and the second direction, three-dimensional position information of the target object is detected based on the first direction and the second direction. Acquiring and detecting the operation signal based on the three-dimensional position information,
Video projection lighting device. An image projection unit that projects an image on the first region,
A peripheral illumination unit that emits a luminous flux of peripheral illumination light that illuminates a second region that surrounds the first region;
Equipped with
The light source of the peripheral illumination unit is an OLED,
On the emission side of the light source, a two-dimensional modulation unit that two-dimensionally controls the shape, emission intensity, and color of the light flux is provided.
Video projection lighting device. An image projection unit that projects an image on the first region,
A peripheral illumination unit that emits peripheral illumination light that illuminates a second region that surrounds the first region;
A central illumination unit that emits central illumination light that illuminates the first region;
Equipped with
The peripheral illumination unit and the central illumination unit are arranged on the emission side of the peripheral illumination light and the central illumination light, and includes a light distribution control unit that controls the light distribution of the peripheral illumination light and the central illumination light,
The peripheral illumination unit, the central illumination unit, and the light distribution control unit are respectively configured to surround the image projection unit,
The light distribution control unit of the peripheral illumination unit includes a lens for diverging and emitting the peripheral illumination light, and a curvature of the emission surface of the lens on the image projection unit side and away from the image projection unit. The curvature of the side is different,
Video projection lighting device. The image projection illumination device according to claim 4,
The curvature of the exit surface of the lens on the side away from the image projection unit is smaller than the curvature on the image projection unit side,
Video projection lighting device. The image projection illumination device according to any one of claims 1 and 3 to 5 ,
An environment sensor for acquiring environment information of the surrounding environment, and a control unit,
The control unit adjusts the illuminance of the ambient illumination light based on the environmental information,
Video projection lighting device. The image projection illumination device according to claim 2,
Equipped with an environmental sensor that acquires environmental information of the surrounding environment,
The control unit adjusts the illuminance of the ambient illumination light based on the environmental information,
Video projection lighting device. The image projection illumination device according to any one of claims 1 and 3 to 5 ,
An environment sensor for acquiring environment information of the surrounding environment, and a control unit,
The control unit adjusts the brightness of the image based on the environment information,
Video projection lighting device. The image projection illumination device according to claim 2,
Equipped with an environmental sensor that acquires environmental information of the surrounding environment,
The control unit adjusts the brightness of the image based on the environment information,
Video projection lighting device. The image projection illumination device according to claim 4 or 5 ,
An operation input unit that receives an operation signal from a user, and a control unit,
The control unit includes a first mode in which the peripheral illumination unit emits the peripheral illumination light and the image is projected at the same time based on the operation signal received by the operation input unit, and the peripheral illumination. Switching between a second mode in which the peripheral illumination light is emitted by the unit and the central illumination light is emitted by the central illumination unit at the same time.
Video projection lighting device. The image projection illumination device according to any one of claims 1 , 2, 4 and 5 ,
Light source of the ambient illumination unit includes a semiconductor laser, and a phosphor that emits the surrounding lighting light by being excited by the laser light emitted from said semiconductor laser,
Video projection lighting device. The image projection illumination device according to any one of claims 1 to 3 ,
A light distribution control unit for controlling light distribution of the peripheral illumination light,
A light guide body that guides the peripheral illumination light to the light distribution control unit is disposed between the light source of the peripheral illumination unit and the light distribution control unit.
Video projection lighting device. The image projection illumination device according to claim 4 or 5,
A light guide body that guides the peripheral illumination light to the light distribution control unit is disposed between the light source of the peripheral illumination unit and the light distribution control unit.
Video projection lighting device. The image projection illumination device according to any one of claims 1 to 5 ,
The peripheral illumination unit includes a plurality of light sources arranged so as to surround the image projection unit in a plan view, and is switched on and off for each of the light sources.
Video projection lighting device. The image projection illumination device according to any one of claims 1 to 5 ,
A diffusion cover for diffusing the peripheral illumination light is provided on the emission side of the peripheral illumination unit,
Video projection lighting device.

Images