JP7113333B2 - WAVELENGTH CONVERSION WHEEL DEVICE, LIGHTING DEVICE, AND PROJECTION TYPE VIDEO DISPLAY DEVICE - Google Patents

Description

The present disclosure relates to a wavelength conversion wheel device used, for example, in lighting devices or projection display devices. The present disclosure also relates to a lighting device or projection display device comprising such a wavelength conversion wheel device.

2. Description of the Related Art Conventional projection-type image display devices include a type that utilizes fluorescence generated by applying excitation light to phosphors. In this type of projection-type image display apparatus, there is a risk that the phosphors will heat up and deteriorate due to irradiation of the phosphors with the excitation light, so it is necessary to cool the phosphors.

Patent Document 1 discloses a phosphor wheel device in which openings and fins are further formed in a substrate on which phosphors are formed. The substrate of this phosphor wheel device has openings and fins closer to the center of the substrate than the ring-shaped phosphor. This effectively dissipates heat from the substrate when the phosphor wheel device rotates.

WO2017/154048

The heat dissipation efficiency of a wavelength conversion wheel device having wavelength converters such as phosphors varies depending on the arrangement of apertures and protrusions (fins). Therefore, there is a need for novel arrangements of apertures and protrusions that can effectively dissipate heat from the wavelength conversion wheel assembly.

An object of the present disclosure is to provide a wavelength conversion wheel device capable of effectively dissipating heat generated by a wavelength converter. A further object of the present disclosure is to provide an illuminating device or a projection display device equipped with such a wavelength conversion wheel device.

A wavelength converting wheel device according to one aspect of the present disclosure includes a substrate, a wavelength converter, a plurality of first apertures, and a plurality of first projections. The substrate is rotatable around an axis of rotation. The wavelength converter is formed on the substrate on a circumference having a predetermined radius from the axis of rotation and generates light having a wavelength different from that of the incident light. A plurality of first apertures are periodically formed in the substrate radially outward of the wavelength converter about the axis of rotation and angularly about the axis of rotation. The plurality of first protrusions are formed on the base material radially outwardly of the wavelength converter about the axis of rotation and periodically with respect to angular directions about the axis of rotation, has a predetermined length with respect to

A wavelength conversion wheel device according to an aspect of the present disclosure can effectively dissipate heat generated by a wavelength converter.

FIG. 2 is a schematic diagram showing the configuration of lighting device 100 including wavelength conversion wheel device 190 according to Embodiment 1. FIG. Figure 2 shows the front face 192a of the wavelength conversion wheel assembly 190 of Figure 1; Figure 2 shows the rear face 192b of the wavelength converting wheel assembly 190 of Figure 1; FIG. 2 is a schematic cross-sectional view of the wavelength conversion wheel device 190 of FIG. 1; 2 is a schematic diagram showing the flow of air around a projection 197 of the wavelength conversion wheel device 190 of FIG. 1; FIG. It is a diagram showing the temperature distribution around the substrate 192 of the wavelength conversion wheel device 190 of FIG. It is a diagram showing the temperature distribution around the substrate 192 of the wavelength conversion wheel device 190 of FIG. 2 is a schematic diagram for explaining the arrangement of openings 196 and protrusions 197 of the wavelength conversion wheel device 190 of FIG. 1; FIG. FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190A according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190B according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190C according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190D according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190E according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190F according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190G according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190H according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190I according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190J according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190K according to a modified example of Embodiment 1; FIG. 10 is a diagram showing a rear surface 192b of a wavelength conversion wheel device 190L according to a modified example of Embodiment 1; FIG. 10 is a schematic cross-sectional view of a wavelength conversion wheel device 190M according to a modification of Embodiment 1; FIG. 5 is a schematic cross-sectional view of a wavelength conversion wheel device 190N according to a modification of Embodiment 1; FIG. 10 is a schematic cross-sectional view of a wavelength conversion wheel device 190O according to a modification of Embodiment 1; FIG. 10 is a schematic diagram showing the configuration of an illumination device 200 including a wavelength conversion wheel device 290 according to Embodiment 2; Figure 10 shows the front face 192a of the wavelength conversion wheel assembly 290 of Figure 9; Figure 10 shows the rear face 192b of the wavelength conversion wheel assembly 290 of Figure 9; FIG. 11 is a schematic diagram showing the configuration of an illumination device 300 including a wavelength conversion wheel device 390 according to Embodiment 3; 12 shows a front surface 192a of the wavelength conversion wheel 310 of the wavelength conversion wheel device 390 of FIG. 11; FIG. 12 shows a rear surface 192b of the wavelength conversion wheel 310 of the wavelength conversion wheel device 390 of FIG. 11; FIG. FIG. 12 is a perspective view showing the configuration of a fin member 320 of the wavelength conversion wheel device 390 of FIG. 11; Figure 12 shows the rear face 192b of the wavelength conversion wheel assembly 390 of Figure 11; FIG. 12 is an exploded perspective view of the wavelength conversion wheel device 390 of FIG. 11; FIG. 12 is a schematic cross-sectional view of the wavelength conversion wheel device 390 of FIG. 11; FIG. 11 is a schematic diagram showing a projection-type image display device equipped with a lighting device 300 having a wavelength conversion wheel device 390 according to a fourth embodiment;

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for a thorough understanding of the present disclosure by those skilled in the art and are not intended to limit the claimed subject matter.

(Embodiment 1)
An illumination device including a wavelength conversion wheel device according to Embodiment 1 will be described below with reference to FIGS. 1 to 8C. In this embodiment, a phosphor that converts the wavelength of blue light to that of yellow light is used as the material of the wavelength converter.

[1-1. Constitution]
[1-1-1. Configuration of lighting device]
FIG. 1 is a schematic diagram showing the configuration of an illumination device 100 including a wavelength conversion wheel device 190 according to Embodiment 1. FIG. The illumination device 100 includes blue laser diodes 101a to 101e, collimator lenses 102a to 102e, lenses 13, 14, 17, 18, 20, 22, and 23, diffusion plates 15 and 21, a dichroic mirror 16, a wavelength conversion wheel device 190, a motor 194 and rod integrator 24 .

In the illumination device 100 of FIG. 1, the blue laser diodes 101a to 101c are used as light source elements of excitation light for exciting phosphors (described later) of the wavelength conversion wheel device 190 to generate yellow light. The blue laser diodes 101a to 101c emit blue laser light in the -Y direction. The emitted blue light is collimated by collimating lenses 102a-102c. The collimated blue light is converged by an afocal optical system composed of lenses 13 and 14 and enters a diffusion plate 15 . The blue light incident on the diffuser plate 15 is diffused by the diffuser plate 15 and enters the dichroic mirror 16 . The dichroic mirror 16 transmits blue light and reflects other visible light.

The dichroic mirror 16 is arranged at an angle of 45 degrees with respect to the optical axis. The dichroic mirror 16 transmits blue light incident from the diffusion plate 15 . This blue light passes through the lenses 17 and 18 and enters the wavelength conversion wheel device 190 .

Collimating lenses 102a-102c, lenses 13 and 14, diffusion plate 15, dichroic mirror 16, and lenses 17 and 18 are light guiding optics that guide the light generated by blue laser diodes 101a-101c to wavelength converter 191. .

The wavelength conversion wheel device 190 comprises a wavelength converter 191 , a substrate 192 and a reflective film 193 . The substrate 192 has, for example, a disk shape. The wavelength converter 191 is annularly formed on the front surface of the substrate 192 of the wavelength conversion wheel device 190 . A reflective film 193 is formed between the wavelength converter 191 and the substrate 192 . A substrate 192 of the wavelength conversion wheel device 190 is rotated by a motor 194 .

The blue light incident on the wavelength conversion wheel device 190 irradiates the wavelength converter 191 . As the substrate 192 rotates, the wavelength converter 191 provided on the substrate 192 also rotates. As the wavelength converter 191 rotates, the position where the blue light is incident on the wavelength converter 191 changes with time. Thereby, the area where the wavelength converter 191 is heated by the blue light can be expanded. Thereby, even when the energy of the irradiated blue light is high, the temperature rise of the wavelength converter 191 can be suppressed.

Wavelength converter 191 generates light having a wavelength different from the wavelength of the incident light. The wavelength converter 191 is composed of a phosphor that emits yellow fluorescence when excited by the irradiated blue light (excitation light). Most of the yellow light emitted by the wavelength converter 191 is emitted in the +Y direction. The yellow light once emitted in the -Y direction is also reflected by the reflective film 193 formed on the substrate 192 and returned in the +Y direction. After that, the yellow light passes through lenses 18 and 17 and enters dichroic mirror 16 . Since the dichroic mirror 16 reflects visible light other than blue light, the incident yellow light is reflected by the dichroic mirror 16 and travels in the +X direction. The yellow light is incident on the lens 23 and condensed on the incident surface of the rod integrator 24 having a rectangular aperture arranged on the output surface side of the lens 23 .

Thus, the blue light emitted from the blue laser diodes 101a-101c excites the wavelength converter 191 to generate yellow light.

On the other hand, the blue laser diodes 101d and 101e are used as light source elements for the blue light component of the light output from the illumination device 100 that is output without wavelength conversion. Blue light emitted in the +X direction from the blue laser diodes 101d and 101e is collimated by collimator lenses 102d and 102e. The collimated blue light is focused on the diffuser plate 21 by the lens 20 . The blue light diffused by the diffusion plate 21 becomes substantially parallel light by the lens 22 . The blue light that has passed through the lens 22 is incident on the dichroic mirror 16 , is transmitted in the +X direction, and is incident on the lens 23 .

The blue light from the blue laser diodes 101d and 101e is combined with the yellow light generated by the blue laser diodes 101a-101c and the wavelength conversion wheel device 190 to produce white light. Thus, the illumination device 100 obtains white light from the blue light of the blue laser diodes 101a-101e. This white light is condensed on the entrance surface of a rod integrator 24 having a rectangular aperture arranged on the exit surface side of the lens 23 .

In this configuration, output light of illumination device 100 is obtained from the exit surface of rod integrator 24 . Furthermore, if necessary, an additional optical system may be provided on the side of the exit surface of the rod integrator 24, and the emitted light may be incident on the optical system. A lens array composed of rectangular lenses may be used instead of the lens 23 and the rod integrator 24 .

[1-1-2. Configuration of wavelength conversion wheel device]
Next, the detailed configuration of the wavelength conversion wheel device 190 will be described with reference to FIGS. 2A and 2B. FIG. 2A is a diagram showing the front surface 192a of the wavelength conversion wheel assembly 190 of FIG. FIG. 2B is a view showing the rear face 192b of the wavelength converting wheel assembly 190 of FIG. In this specification, in the substrate 192 of the wavelength conversion wheel device 190, the surface of the side on which the blue light from the blue laser diodes 101a to 101c is incident is referred to as the "front surface 192a", and the opposite surface is referred to as the "rear surface 192b". It says. Also, in this specification, as shown in FIG. The angular direction (circumferential direction) of a circle centered on the rotation axis J is shown.

The substrate 192 is formed to be rotatable about an axis of rotation J, as shown in FIGS. 2A and 2B. The substrate 192 is, for example, formed in a disc shape having a diameter of 11 cm and a thickness of 1 mm, but is not limited to these dimensions. Since the substrate 192 has a disk shape, it has two circular planes, one of which is a front surface 192a and the other of which is a rear surface 192b. The substrate 192 also has a circular opening 195 centered on the rotation axis J and concentric with the substrate 192 . A plurality of screw holes 198 are provided around the opening 195 . Substrate 192 is attached to motor 194 for rotating substrate 192 via opening 195 and screw hole 198 . A part of the motor 194 fits into the opening 195 of the base material 192 from the rear surface 192b side and is screwed in the screw hole 198. As shown in FIG. The substrate 192 is rotated around the rotation axis J by the motor 194 .

As shown in FIG. 2A, the wavelength converter 191 is annularly formed on the front surface 192a of the substrate 192 . Specifically, the wavelength converter 191 has a predetermined width inside and outside the circumference on a circle spaced from the rotation axis J of the wavelength conversion wheel device 190 in the radial direction r. It is formed in a ring shape along the The wavelength converter 191 can be formed by mixing phosphor powder with a thermosetting resin, applying it to the substrate 192 by screen printing, and then heating and curing it in a heating furnace. In this embodiment, the wavelength converter 191 is formed using phosphor powder that emits yellow light when excited by blue light.

Although the wavelength converter 191 is formed by mixing the phosphor powder with the thermosetting resin and fixing it on the substrate 192, the formation method is not limited to this. For example, the wavelength converter 191 may be formed of an inorganic material on the substrate 192 . Similar effects can also be expected by adhering an inorganic material to the substrate 192 using an organic adhesive.

2. Description of the Related Art In a system that requires illumination light of high brightness, such as an illumination device for a projection display device, excitation light having large energy is used to excite phosphors. When a phosphor absorbs excitation light and emits fluorescence, about half of the energy of the excitation light is used for wavelength conversion, but the rest of the energy becomes heat. Therefore, the phosphor irradiated with strong excitation light reaches a very high temperature. On the other hand, if the temperature of the phosphor is high, the degradation of the phosphor is accelerated and the reliability of the wavelength conversion wheel device is lowered. Therefore, it is required to effectively dissipate heat from the phosphor. Therefore, a material having high thermal conductivity is often used for the base material 192 of the wavelength conversion wheel device 190 . In the wavelength conversion wheel device 190 of Embodiment 1, an aluminum material is used as the material of the base material 192, but the material of the base material 192 is not limited to this.

As shown in FIGS. 2A and 2B, the substrate 192 is provided with a plurality of openings 196 and a plurality of protrusions 197 . Each aperture 196 is formed in the substrate 192 outwardly of the wavelength converter 191 with respect to the radial direction r and periodically with respect to the angular direction θ about the axis of rotation J. Each opening 196 extends through substrate 192 . Each protrusion 197 is also periodically formed on the substrate 192 , outwardly of the wavelength converter 191 with respect to the radial direction r and with respect to the angular direction θ about the axis of rotation J. Each protrusion 197 is formed near each opening 196 . In this embodiment, each projection 197 is formed on a surface of the substrate 192 different from the surface on which the wavelength converter 191 is formed, that is, a rear surface 192b. Each projection 197 is made of the same material as the base material 192, for example. Each protrusion 197 is integrally formed with the base material 192 using, for example, press working. Also, each projection 197 has a predetermined length with respect to the radial direction r about the rotation axis J. As shown in FIG. Each projection 197 is radially formed so as to generate wind from the rotation axis J toward the outside of the wavelength converter 191 with respect to the radial direction r. Here, "radially" includes, for example, the case where each projection 197 is formed along the radial direction r, and further includes the case where each projection 197 is formed obliquely with respect to the radial direction r. The latter includes, for example, the case where the length of one protrusion 197 in the radial direction r is longer than the length in the angular direction θ, as shown in this embodiment. In this embodiment, for example, each opening 196 has a circular shape with a diameter of 4 mm, and each projection 197 has a width of 1 mm, a length of 10 mm, and a height of 1 mm, although the dimensions of each opening 196 and each projection 197 are are not limited to these.

In this specification, the opening 196 is also called "first opening", and the projection 197 is also called "first projection".

[1-2. action]
Next, with reference to FIGS. 3 and 4, the effects obtained by arranging the openings 196 and projections 197 in this manner will be described. FIG. 3 is a schematic cross-sectional view of the wavelength conversion wheel device 190 of FIG. FIG. 3 shows a cross section along the line AA' of FIG. 2A. Note that FIG. 3 also schematically shows the motor 194 . FIG. 4 is a schematic diagram showing the flow of air around the protrusion 197 of the wavelength conversion wheel device 190 of FIG. FIG. 4 shows the rear surface 192b of the substrate 192. FIG. Motor 194 rotates substrate 192 in a clockwise direction when viewed from rear surface 192b of substrate 192, as shown in FIGS. 2B, 3, and 4. FIG. In this specification, the direction in which the substrate 192 rotates is defined as the positive direction with respect to the angular direction θ.

As shown in FIG. 3, the wavelength converter 191 is formed on the front surface 192a of the substrate 192, and a plurality of radial protrusions 197 are formed on the rear surface 192b of the substrate 192. As shown in FIG. When the base material 192 is rotated by the motor 194 , a wind W is generated from the center of the base material 192 toward the outer periphery in the vicinity of the base material 192 . In addition, since the opening 196 and the protrusion 197 are formed, either the wind Wa directed from the front surface 192a to the rear surface 192b through the opening 196 or the wind Wb directed from the rear surface 192b to the front surface 192a through the opening 196 Occur. The generation mechanism of these winds Wa or Wb will be described with reference to FIG.

First, the behavior of the wind in the vicinity of the projection 197 will be described with reference to FIG. Here, for ease of understanding, it is assumed that the protrusion 197 has a rectangular parallelepiped shape including side surfaces parallel to the radial direction r. Here, among the side surfaces parallel to the radial direction r, the +θ side is the side surface L1, the −θ side is the side surface L2, and the +r side is the side surface L3 among the side surfaces perpendicular to the radial direction r, and the −θ side is the side surface. Let it be L4.

As described above, when the substrate 192 of the wavelength conversion wheel device 190 rotates in the positive direction with respect to the angular direction θ, the wind W is naturally generated in the vicinity of the substrate 192 from the center to the outer periphery of the substrate 192 . The wind W includes a component (Wr) in the radial direction caused by centrifugal force and a component (Wθ) in the negative direction with respect to the angular direction θ caused by frictional force and viscosity.

With the protrusion 197, the component Wθ of the wind directed toward the side surface L1 is blocked by the side surface L1, changes its direction, and flows along the side surface L1. Therefore, the wind component Wr increases on the side surface L1 [phenomenon 1]. On the other hand, the wind component Wr from the center of the base member 192 toward the side surface L4 is blocked by the side surface L4, changes direction, and flows along the side surface L1 or the side surface L2. Therefore, the wind component Wr increases on the side surface L1 and the side surface L2. At this time, since the base material 192 is rotating, the wind component Wr tends to flow more toward the rear side surface L2 than the front side surface L1 with respect to the rotation direction of the base material 192 [Phenomenon 2]. An increase in the wind component Wr means an increase in the wind speed in the radial direction r. Further, the air pressure increases in the vicinity of the side surface L1 (region U in FIG. 4) because the wind component Wθ collides with the side surface L1 [phenomenon 3]. On the other hand, at both ends of the side surface L2 (positions in contact with the side surfaces L3 and L4), the flow of air is disturbed and separated from the protrusion 197, and the air pressure decreases near the side surface L2 (region D in FIG. 4) [phenomenon 4].

That is, in the vicinity of the projection 197, the increase in wind speed [phenomenon 1] and the increase in air pressure [phenomenon 3] on the side L1, the increase in wind speed [phenomenon 2] and the decrease in air pressure [phenomenon 4] on the side L2 occur. two phenomena occur simultaneously. In addition, gas has the property of decreasing the air pressure (static pressure) as the wind speed (dynamic pressure) increases, and also has the property of flowing from a high pressure region to a low pressure region. Forming apertures 196 combines these properties of the gas with the four phenomena described above to determine the flow of air at apertures 196 .

Next, with reference to FIGS. 3 and 4, the mechanism by which the flow of the wind Wa occurs will be described. As described above, in the vicinity of the side surface L2 in FIG. 4 , air pressure decreases due to separation of the wind, and in addition, an increase in wind speed due to Phenomenon 2 also decreases the air pressure. Therefore, when an opening 196 is provided through the base material 192 in the area D of FIG. 4, air flows from the front surface 192a through the opening 196 toward the rear surface 192b, generating wind Wa, as shown in FIG. In the present embodiment, since the opening 196 is formed near the side surface L2, the wind Wa is likely to occur.

Next, with reference to FIGS. 3 and 4, the mechanism by which the wind Wb flows will be described. As described above, in the vicinity of the side surface L1 in FIG. 4, the air pressure decreases due to the increase in wind speed due to Phenomenon 1. On the other hand, the air pressure rises due to the collision of the wind component Wθ, and these are in balance. . At this time, if an opening 196 penetrating through the base material 192 is provided at a position where the influence of the increase in air pressure (phenomenon 3) exceeds the influence of the increase in wind speed (phenomenon 2) in the region U of FIG. As shown, air flows from the rear surface 192b through the opening 196 to the front surface 192a to generate the wind Wb. On the other hand, if the opening 196 is provided at a position where the increase in wind speed (phenomenon 2) exceeds the effect of the increase in air pressure (phenomenon 3) in region U in FIG. 4, wind Wa is generated.

Whether wind Wa or wind Wb is generated changes depending on the shape of each opening 196 and each projection 197 and also changes depending on the positional relationship between each opening 196 and each projection 197 . Further, which of the wind Wa or wind Wb is generated changes depending on the thickness and size of the substrate 192, the conditions of the rotation speed, and the shape of the space in which the wavelength conversion wheel device is installed. .

FIG. 4 shows the case where the protrusions 197 are formed along the radial direction r, but as shown in FIGS. , in the vicinity of the protrusion 197, the phenomena 1 to 4 described above occur similarly. By forming the projections 197 inclined with respect to the radial direction r, the range of the side surface that blocks the wind W is increased, and the increase in wind speed and separation of the wind in the vicinity of the projections 197 are promoted.

[1-3. effect]
Next, with reference to FIGS. 5A and 5B, the cooling effect due to the action of openings 196 and protrusions 197 will be described. FIG. 5A is a diagram showing the temperature distribution around the substrate 192 of the wavelength conversion wheel device 190 of FIG. FIG. 5B is a diagram showing the temperature distribution around the substrate 192 of the wavelength conversion wheel device 190 of FIG. 5A and 5B show an enlarged cut surface along the radial direction r around the wavelength converter 191. FIG. Note that the projection 197 is omitted in FIGS. 5A and 5B. Also, the temperature values in FIGS. 5A and 5B are examples for ease of understanding, and are not limited to these values.

As shown in FIG. 5A, at a position remote from the opening 196 in the base material 192, the temperature rise between the base material 192 heated by the heat generated by the wavelength converter 191 and the ambient temperature (25° C.) air. A boundary layer develops. Since the flow of the wind W is limited to the direction parallel to the front surface 192a or the rear surface 192b, the thickness of the thermal boundary layer increases as it progresses from the center of the base material 192 toward the outer circumference, and the thickness of the base material 192 and the wavelength converter 191 increases. is surrounded by an air layer above 120°C.

Substantially the same temperature distribution as that of FIG. 5A also occurs in a substrate without openings.

On the other hand, as shown in FIG. 5B, when there is an opening 196, wind Wa or wind Wb passing through the opening 196 is generated. This thins the thermal boundary layer between the ambient temperature (25° C.) air and the substrate 192 in the vicinity of the opening 196 . Thus, the substrate 192 and wavelength converter 191 now have access to ambient temperature air (or at least air cooler than 120° C.). As the thermal boundary layer becomes thinner, the convective heat transfer coefficient increases and the heat dissipation effect of the substrate 192 increases. This makes it easier for the substrate 192 and the wavelength converter 191 to dissipate heat. Note that the temperature boundary layers shown in FIGS. 5A and 5B have been simplified without considering the fact that the temperature of the wavelength converter 191 is higher than that of the substrate 192, giving priority to ease of understanding. Shown in shape.

As described above, the wind Wa or wind Wb passing through the openings 196 thins the temperature boundary layer in the direction perpendicular to the front or rear surface of the base 192 , thereby increasing the heat dissipation effect of the base 192 . In order to reduce the temperature of the wavelength converter 191, it is effective to make the temperature boundary layer thinner on the front surface 192a side. Therefore, the more the wind Wa that flows into the opening 196 after passing over the wavelength converter 191, the more the effect of reducing the temperature of the wavelength converter 191 increases.

The arrangement of the openings 196 and the protrusions 197 where the wind Wa is likely to occur will be described below with reference to FIG.

FIG. 6 is a schematic diagram for explaining the arrangement of the openings 196 and projections 197 of the wavelength conversion wheel device 190 of FIG. FIG. 6 shows an enlarged portion of the rear surface 192b of the substrate 192. As shown in FIG. In FIG. 6, the wavelength converter 191 formed on the front surface 192a is indicated by a dotted line so that the positional relationship between the projection 197 and the wavelength converter 191 can be understood.

As described above, the plurality of openings 196 (196-1, 196-2, . . . ) and the plurality of projections 197 (197-1, 197-2, . formed in Here, consider a pair of projections 197-1 and 197-2 that are adjacent to each other with a unit period apart with respect to the angular direction θ about the rotation axis J. FIG. When the substrate 192 rotates in the positive direction with respect to the angular direction θ, the projection 197-1 is formed forward with respect to the rotational direction of the substrate 192, and the projection 197-2 is formed rearward with respect to the rotational direction of the substrate 192. At this time, the opening 196-1 is formed closer to the projection 197-1 formed forward in the rotational direction of the base 192 than to the projection 197-2 formed rearward in the rotational direction of the base 192. be. Other openings 196 and other projections 197 are arranged similarly to opening 196-1 and projections 197-1 and 197-2. In other words, each opening 196 is located in area D of FIG.

The distance between each opening 196 and each protrusion 197 may be defined, for example, by the shortest distance between the contour of each opening 196 and the contour of each protrusion 197 on the rear surface 192b of the substrate 192 . In the example of FIG. 6, the outline of the opening 196-1 and the outline of the projection 197-1 are separated from each other by the shortest distance d1, and the outline of the opening 196-1 and the outline of the projection 197-2 are separated by the shortest distance d2. are separated from each other with d1<d2.

Instead, the distance between each opening 196 and each protrusion 197 is determined by the geometric center of gravity of the figure formed by the contour of each opening 196 and the figure formed by the contour of each protrusion 197 on the rear surface 192b of the substrate 192. It may be defined by the distance to the geometric centroid.

Instead, the distance between each opening 196 and each protrusion 197 is determined by the distance between each protrusion 197 and the line connecting any point (eg, the geometrical center of gravity) in the figure formed by the contour of each opening 196 and the axis of rotation J. A straight line joining an arbitrary point (eg, the geometric center of gravity) in the figure formed by the contour and the axis of rotation J may be defined by the difference in angle formed about the axis of rotation J.

By arranging the openings 196 and the protrusions 197 in this way, as described with reference to FIGS. 3 and 4, the wind Wa that flows from the front surface 192a through the openings 196 toward the rear surface 192b is likely to be generated.

Each opening 196 may be formed closer to a protrusion 197 formed rearward with respect to the rotational direction of substrate 192 than to a protrusion 197 formed forward with respect to the rotational direction of substrate 192 . This corresponds to the case where each opening 196 is located in region U in FIG. As described with reference to FIGS. 3 and 4, in the region U, the conditions for the generation of the wind Wa (phenomenon 1) and the conditions for the generation of the wind Wb (phenomenon 3) coexist. Therefore, even when the openings 196 and the projections 197 are arranged in this way, the thickness and size of the base material 192, the shape of each opening 196, the shape of each projection 197, the conditions of the rotation speed, and the wavelength conversion By adjusting the shape of the space in which the wheel device is installed, it is possible to promote the occurrence of Phenomenon 1 and facilitate the generation of the wind Wa that flows from the front surface 192a through the opening 196 toward the rear surface 192b.

Each opening 196 may be formed at a position approximately midway between the projection 197 formed forward with respect to the rotational direction of the base 192 and the projection 197 formed rearward with respect to the rotational direction of the base 192 . By adjusting the thickness and size of the base material 192, the shape of each opening 196, the shape of each projection 197, the condition of the rotation speed, and the shape of the space in which the wavelength conversion wheel device is installed, the wind speed between each projection can be raised (phenomenon 1 and phenomenon 2), it is possible to easily generate the wind Wa that flows from the front surface 192a through the opening 196 toward the rear surface 192b.

According to the wavelength conversion wheel device 190 according to this embodiment, the heat generated in the wavelength converter 191 can be effectively dissipated by arranging the openings 196 and the protrusions 197 as described above.

[1-4. Modification]
Modifications of the shapes of the openings 196 and projections 197 described above will be described below with reference to FIGS. 7A to 8C. In these modified examples, each opening 196 and each protrusion 197 are formed so as to promote the generation of wind Wa. The generation of the wind Wa is related to Phenomenon 1, Phenomenon 2, and Phenomenon 4 described with reference to FIG. Each protrusion 197 promotes the occurrence of any of Phenomenon 1, Phenomenon 2, and Phenomenon 4 described above. Each opening 196 is formed in any region where Phenomenon 1, Phenomenon 2, and Phenomenon 4 occur.

FIG. 7A is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190A according to the modification of the first embodiment. The wavelength conversion wheel device 190A of FIG. 7A includes protrusions 197A formed along the radial direction r instead of the protrusions 197 of FIG. 2B. Protrusion 197A of FIG. 7A can also cause Phenomenon 1, Phenomenon 2, and Phenomenon 4, similar to protrusion 197 of FIG. 2B.

FIG. 7B is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190B according to the modification of the first embodiment. The wavelength conversion wheel assembly 190B of FIG. 7B includes, instead of the protrusion 197 of FIG. 2B, a protrusion 197B having a different angle with respect to the radial direction r than the protrusion 197 of FIG. 2B and the protrusion 197A of FIG. 7A. Protrusion 197B of FIG. 7B can also cause Phenomenon 1, Phenomenon 2, and Phenomenon 4, similar to Protrusion 197 of FIG. 2B and Protrusion 197A of FIG. 7A.

2B, the projection 197A in FIG. 7A, and the projection 197B in FIG. 7B, the projections can be arranged arbitrarily as long as Phenomenon 1, Phenomenon 2, and Phenomenon 4 can occur. can be done.

FIG. 7C is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190C according to the modification of the first embodiment. The wavelength conversion wheel device 190C of FIG. 7C includes an aperture 196C having a different shape than the aperture 196 of FIG. 2B in place of the aperture 196 of FIG. 2B. The opening 196C in FIG. 7C can also generate the wind Wa that flows from the front surface 192a through the opening 196 toward the rear surface 192b similarly to the opening 196 in FIG. 2B.

FIG. 7D is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190D according to the modification of the first embodiment. The wavelength converting wheel assembly 190D of FIG. 7D includes an aperture 196D having a different position and size than the aperture 196 of FIG. 2B and the aperture 196C of FIG. 7C in place of the aperture 196 of FIG. 2B. Each aperture may be formed at any position on the substrate 192 where Phenomenon 1, Phenomenon 2, and Phenomenon 4 occur as long as it is outside the wavelength converter 191 with respect to the radial direction r. The opening 196D in FIG. 7D can also generate the wind Wa that flows from the front surface 192a through the opening 196 toward the rear surface 192b, similar to the opening 196 in FIG. 2B and the opening 196C in FIG. 7C.

The opening 196 in FIG. 2B, the opening 196C in FIG. 7C, and the opening 196D in FIG. 7D are not limited to the shape, position, and size, and can generate the wind Wa flowing from the front surface 192a toward the rear surface 192b through the opening 196. Possibly, openings having any shape, any position, and any size can be formed.

FIG. 7E is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190E according to the modification of the first embodiment. In place of the aperture 196 of FIG. 2B, the wavelength conversion wheel device 190E of FIG. 7E has at least two different types of at least one attribute of shape, size, distance from the rotation axis J, and distance from each projection 197. openings 196Ea and 196Eb. Each opening 196Ea has a larger size than each opening 196Eb. Each opening 196Ea is formed farther from the rotation axis J than each opening 196Eb. By combining the openings 196Ea and 196Eb with different sizes and positions, the wind Wa flowing from the front surface 192a to the rear surface 192b through the openings 196Ea and 196Eb can be increased to achieve a desired heat dissipation effect.

FIG. 7F is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190F according to the modification of the first embodiment. In place of the aperture 196 of FIG. 2B, the wavelength conversion wheel device 190F of FIG. 7F has at least two different types of at least one attribute of shape, size, distance from the rotation axis J, and distance from each projection 197. openings 196Fa and 196Fb. Each opening 196Fa has a larger size than each opening 196Fb. Also, each opening 196Fa is formed farther from the rotation axis J than each opening 196Fb. Further, each opening 196Fa is formed closer to the projection 197 formed forward in the rotational direction of the base 192 than to the projection 197 formed rearward in the rotational direction of the base 192 . On the other hand, each opening 196Fb is formed closer to the projection 197 formed rearward with respect to the rotation direction of the base 192 than to the projection 197 formed forward with respect to the rotation direction of the base 192 . By providing each opening 196Fa, as described with reference to FIGS. 3 and 4, it becomes easier to generate the wind Wa that flows from the front surface 192a through the opening 196 toward the rear surface 192b. On the other hand, by providing the openings 196Fb, the openings 196Fb are formed at positions where the influence of the phenomenon 1 described with reference to FIG. By combining the openings 196Fa and 196Fb with different sizes and positions, it is possible to increase the wind Wa in the base material 192 and achieve a desired heat dissipation effect.

FIG. 7G is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190G according to the modification of the first embodiment. The wavelength conversion wheel device 190G of FIG. 7G includes a protrusion 197G having a curved contour shape on the rear surface 192b of the substrate 192 in place of the rectangular parallelepiped protrusion 197 of FIG. 2B. Each projection 197G is formed on the rear surface 192b of the base material 192 so as to curve in the positive direction with respect to the angular direction θ as it progresses from the rotation axis J toward the outer periphery. In the wavelength conversion wheel device 190G provided with such projections 197G, if the openings 196 are formed behind the projections 197G with respect to the rotation direction of the base material 192, the light from the front surface 192a of the base material 192 will be emitted regardless of the rotation direction of the base material 192. It becomes easier for the wind Wa to flow to the rear surface 192b. When the base material 192 rotates in the positive direction with respect to the angular direction θ, air separation tends to occur behind the projection 197G with respect to the rotation direction of the base material 192, thereby reducing the pressure behind the projection 197G (phenomenon 4). , the wind Wa becomes easier to flow. On the other hand, when the base material 192 rotates in the negative direction (that is, the direction opposite to the present modification) with respect to the angular direction θ, the wind collides in front of the projection 197G with respect to the rotation direction of the base material 192, and the wind blows along the projection 197G. flow, and the wind speed in front of the protrusion 197G increases (phenomenon 1), thereby making it easier for the wind Wa to flow.

7H is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190H according to the modification of Embodiment 1. FIG. The wavelength conversion wheel assembly 190H of FIG. 7H includes protrusions 197H that extend from the outer region of the wavelength converter 191 to the inner region of the wavelength converter 191 with respect to the radial direction r on the substrate 192 in place of the protrusions 197 of FIG. 2B. In FIG. 7H, the wavelength converter 191 formed on the front surface 192a is indicated by dotted lines. Each protrusion 197H has, for example, a width of 1 mm, a length of 25 mm, and a height of 1 mm, but the dimensions of each protrusion 197 are not limited thereto. Protrusions 197 in FIG. 2B were formed to extend only outside wavelength converter 191 with respect to radial direction r. On the other hand, the protrusion 197H of FIG. 7H directs wind along the sides of the protrusion 197H (see description of FIG. 4) by extending from the outer region of the wavelength converter 191 to the inner region with respect to the radial direction r. The area to be converted becomes wider, and it becomes easier to increase the wind speed on the side surface of the protrusion 197H. By increasing the wind speed, the flow of air from the front surface 192a to the rear surface 192b also increases, and the heat dissipation effect of the substrate 192 is improved. In addition, since the surface area of the substrate 192 is increased by extending the length of the projection 197H, an increase in the heat radiation effect can be expected. Therefore, the protrusion 197H of FIG. 7H can dissipate the heat generated by the wavelength converter 191 more effectively than the protrusion 197 of FIG. 2B.

FIG. 7I is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190I according to the modification of the first embodiment. The wavelength conversion wheel device 190I of FIG. 7I includes openings 196I (196I-1, 196I-2, . . . ) instead of the openings 196 of FIG. 7H. Also, instead of the projection 197H in FIG. 7H, the wavelength conversion wheel device 190I in FIG. Two types of projections 197Ia, 197Ib (197Ia-1, 197Ia-2, . . .; 197Ib-1, 197Ib-2, . . . ) are provided. Each protrusion 197Ib is formed farther from the rotation axis J than each protrusion 197Ia. Each protrusion 197Ib extends from an area outside the wavelength converter 191 with respect to the radial direction r about the rotation axis J to the area where the wavelength converter 191 is formed. Each projection 197Ia extends from the outer region of the wavelength converter 191 to the inner region with respect to the radial direction r about the rotation axis J. As shown in FIG. Each opening 196I is formed closer to each projection 197Ia than each projection 197Ib. The plurality of projections 197Ia are formed periodically with respect to the angular direction θ around the rotation axis J, and the plurality of projections 197Ib are also formed periodically with respect to the angular direction θ around the rotation axis J. Here, consider a pair of projections 197Ia-1 and 197Ia-2 that are adjacent to each other with a unit period apart with respect to the angular direction θ about the rotation axis J. FIG. When the substrate 192 rotates in the positive direction with respect to the angular direction θ, the projection 197Ia-1 is formed forward with respect to the rotational direction of the substrate 192, and the projection 197Ia-2 is formed rearward with respect to the rotational direction of the substrate 192. At this time, the opening 196I-1 is formed closer to the projection 197Ia-1 formed forward with respect to the rotational direction of the base 192 than to the projection 197Ia-2 formed rearward with respect to the rotational direction of the base 192. be. By combining two types of protrusions 197Ia and 197Ib, it is possible to increase the wind speed between the protrusions (phenomenon 1 and phenomenon 2) more than when using only one type of protrusion (for example, in the case of FIG. 7H). It is possible to effectively generate the wind Wa flowing toward the rear surface 192b through the opening 196I. Moreover, since the surface area of the base material 192 is increased, an increase in the heat radiation effect can be expected.

FIG. 7J is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190J according to the modification of the first embodiment. Projections 197Ja, 197Jb (197Ja-1, 197Ja-2, . . .; 197Jb-1, 197Jb-2, . . . ) in FIG. 7J are formed in the same manner as projections 197Ia, 197Ib in FIG. Each opening 196J (196J-1, 196J-2, . . . ) is formed closer to each projection 197Jb than each projection 197Ja. Here, consider a pair of protrusions 197Jb-1 and 197Jb-2 that are adjacent to each other with a unit period apart with respect to the angular direction θ about the rotation axis J. FIG. When the substrate 192 rotates in the positive direction with respect to the angular direction θ, the projection 197Jb-1 is formed forward with respect to the rotational direction of the substrate 192, and the projection 197Jb-2 is formed rearward with respect to the rotational direction of the substrate 192. At this time, the opening 196J-1 is formed closer to the projection 197Jb-1 formed forward with respect to the rotational direction of the base 192 than to the projection 197Jb-2 formed rearward with respect to the rotational direction of the base 192. be. By combining two types of protrusions 197Ja and 197Jb, it is possible to increase the wind speed between the protrusions (phenomenon 1 and phenomenon 2) more than when using only one type of protrusion (for example, the case of FIG. 7H), and the front surface 192a It is possible to effectively generate the wind Wa flowing toward the rear surface 192b through the opening 196J. Moreover, since the surface area of the base material 192 is increased, an increase in the heat radiation effect can be expected.

FIG. 7K is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190K according to the modification of the first embodiment. Protrusions 197Ka, 197Kb (197Ka-1, 197Ka-2, . . . ; 197Kb-1, 197Kb-2, . . . ) of FIG. 7K are formed similarly to protrusions 197Ia, 197Ib of FIG. 7I. Each opening 196K (196K-1, 196K-2, . . . ) is formed equidistant from the projections 197Ka and 197Kb. By combining two types of protrusions 197Ka and 197Kb, it is possible to increase the wind speed between the protrusions (phenomenon 1 and phenomenon 2) more than when using only one type of protrusion (for example, in the case of FIG. 7H). It is possible to effectively generate the wind Wa flowing toward the rear surface 192b through the opening 196K. Moreover, since the surface area of the base material 192 is increased, an increase in the heat radiation effect can be expected.

FIG. 7L is a diagram showing the rear surface 192b of the wavelength conversion wheel device 190L according to the modification of the first embodiment. The wavelength conversion wheel device 190L in FIG. 7L includes protrusions 197La, 197Lb (197La-1, 197La-2 , …; 197Lb-1, 197Lb-2, …). 7G, each projection 197La, 197Lb is formed on the rear surface 192b of the base material 192 so as to curve in the positive direction with respect to the angular direction θ as it progresses from the rotation axis J toward the outer periphery. In the wavelength conversion wheel device 190L having such projections 197La and 197Lb, if the openings 196L (196L-1, 196L-2, . As in the case of , the wind Wa easily flows from the front surface 192a to the rear surface 192b of the substrate 192 regardless of the rotation direction. Also, as in the case of FIGS. 7I to 7K, the use of two types of protrusions can increase the wind speed between the protrusions (phenomenon 1 and phenomenon 2), and furthermore, the surface area of the substrate 192 increases. , the heat dissipation effect increases.

FIG. 8A is a schematic cross-sectional view of a wavelength conversion wheel device 190M according to a modification of Embodiment 1. FIG. FIG. 8B is a schematic cross-sectional view of the wavelength conversion wheel device 190N according to the modification of the first embodiment. 8C is a schematic cross-sectional view of a wavelength conversion wheel device 190O according to a modification of Embodiment 1. FIG. FIGS. 8A-8C show variations of the tilt of the sides of the opening. Each aperture may have sides that are perpendicular to the front 192a and rear 192b sides of the substrate 192, as shown in FIG. 3, or angled with respect to the vertical, as shown in FIGS. It may have sides. The wavelength converting wheel assembly 190M of FIG. 8A includes an aperture 196M having slanted sides that gradually widen as one progresses from the rear face 192b to the front face 192a. The wavelength converting wheel assembly 190N of FIG. 8B includes an aperture 196N having equal width and sloping sides. The wavelength converting wheel assembly 190O of FIG. 8C comprises an opening 196O having sloping sides that gradually widen as one progresses from the front surface 192a to the rear surface 192b. The inclination of the side surface of each opening affects the ease of flow of the wind Wa traveling from the front surface 192a to the rear surface 192b through the opening, or the wind Wb traveling vice versa. Therefore, the inclination of the side surface of each opening is determined by comprehensively considering the ease of processing the base material 192 for forming the opening and the heat radiation effect.

In the following description, each opening and each protrusion in FIGS. 7A-8C are also represented by numerals 196 and 197, respectively.

Further modifications of the wavelength conversion wheel device according to the present embodiment will be described below.

Each projection 197 may have sides that are perpendicular to the rear surface 192b of the substrate 192 as described above and that are angled with respect to the vertical, similar to the sides of each opening shown in FIGS. 8A-8C. It may have sides.

Moreover, in the present embodiment, each opening 196 is formed in a circular shape (see FIG. 2A and others) or an elliptical shape (see FIG. 7C), but the shape of each opening 196 is not limited to these. Each opening 196 may, for example, have the shape of a racetrack elongated in the radial direction r, as disclosed in US Pat.

Further, in the present embodiment, each protrusion 197 is integrally formed from the same material as the base material 192, but these may be configured as separate members. As disclosed in Patent Document 1, each protrusion 197 may be configured by a metal sheet metal member. Alternatively, a member provided with the projections 197 may be prepared separately from the base material 192 using a rigid body having good thermal conductivity, and this member may be attached to the rear surface 192b of the base material 192 with an adhesive or the like. .

Further, according to the configuration of the present embodiment, since each protrusion 197 is formed on the rear surface 192b of the base material 192, the front surface 192a of the base material 192 is flat. Therefore, when using screen printing, for example, the wavelength converter 191 can be formed on the substrate 192 more easily than when each projection 197 is formed on the front surface 192a. Since the heat dissipation effect is improved by forming the protrusion 197 having a height of about 1 mm, a large occupation space is not required on the side of the rear surface 192b of the wavelength conversion wheel device 190 for heat dissipation. Therefore, the illumination device 100 can be miniaturized. However, not forming the projections 197 on the front surface 192a of the substrate 192 is not an essential matter of the present disclosure, and the projections 197 may be formed on the surface on which the wavelength converter 191 is provided.

Further, by removing the components that generate blue light (the light guiding optical system from the blue laser diodes 101d and 101e to the lens 22 in FIG. 1) from the lighting device 100 in FIG. 1, a lighting device that generates yellow light is obtained. may provide.

[1-5. Summary of Embodiment 1]
A wavelength conversion wheel device 190 according to Embodiment 1 includes a base material 192 , a wavelength converter 191 , a plurality of openings 196 and a plurality of projections 197 . The substrate 192 is rotatable around the rotation axis J. The wavelength converter 191 is formed on a circle having a predetermined radius from the rotation axis J on the substrate 192 and generates light having a wavelength different from that of incident light. A plurality of openings 196 are periodically formed in the substrate 192 outside the wavelength converter 191 with respect to the radial direction r and with respect to the angular direction θ about the rotation axis J. As shown in FIG. A plurality of protrusions 197 are formed on the substrate 192 on the outside of the wavelength converter 191 with respect to the radial direction r about the rotation axis J and periodically with respect to the angular direction θ about the rotation axis J. has a given length with respect to radial direction r around .

Thereby, the heat generated in the wavelength converter 191 can be effectively radiated.

In the wavelength conversion wheel device 190 according to Embodiment 1, each opening 196 is one of a pair of projections 197 adjacent to each other and spaced apart by a unit period with respect to the angular direction θ around the rotation axis J. It may be formed closer to the projections 197 formed forward with respect to the rotational direction of the substrate 192 than to the projections 197 formed rearward with respect to the substrate 192 .

This makes it easier to generate wind that flows from the front surface 192 a of the base material 192 to the rear surface 192 b of the base material 192 via each opening 196 .

In the wavelength conversion wheel device 190 according to Embodiment 1, each projection 197 may be formed on a surface of the substrate 192 different from the surface on which the wavelength converters 191 are formed. In this case, each projection 197 may extend from the area outside the wavelength converter 191 with respect to the radial direction r about the axis of rotation J to the area where the wavelength converter 191 is formed. Alternatively, each protrusion 197 may extend from an outer region of wavelength converter 191 to an inner region with respect to radial direction r about rotation axis J. FIG.

As a result, the amount of air flowing from the front surface 192a of the base material 192 to the rear surface 192b of the base material 192 through each opening 196 can be increased, and the heat dissipation effect of the base material 192 can be improved.

In the wavelength conversion wheel device 190 according to Embodiment 1, the plurality of openings 196 are at least two different types with respect to at least one attribute of shape, size, distance from the rotation axis J, and distance from each projection 197. openings.

As a result, the amount of air flowing from the front surface 192a of the base material 192 to the rear surface 192b of the base material 192 through each opening 196 can be increased, and the heat dissipation effect of the base material 192 can be improved.

In the wavelength conversion wheel device 190 according to Embodiment 1, the plurality of protrusions 197 are of at least two different types with respect to at least one attribute of shape, size, distance from the rotation axis J, and distance from each opening 196. may include protrusions of

As a result, it is possible to effectively generate wind that flows from the front surface 192 a of the base material 192 to the rear surface 192 b of the base material 192 via each opening 196 . Moreover, the surface area of the base material 192 can be increased, and the heat dissipation effect of the base material 192 can be improved.

The illumination device 100 according to Embodiment 1 includes a wavelength conversion wheel device 190, a motor 194, blue laser diodes 101a to 101e, and a light guide optical system. A motor 194 rotates the wavelength conversion wheel device 190 . Blue laser diodes 101 a - 101 e generate light at the excitation wavelength of wavelength converter 191 . Part of the light guide optics guides the light generated by the blue laser diodes 101 a - 101 c to the wavelength converter 191 .

As a result, the heat generated by the wavelength converter 191 can be effectively dissipated, so that the wavelength conversion wheel device 190 is less likely to deteriorate, and the illumination device 100 can be stably operated.

(Embodiment 2)
Hereinafter, an illumination device including a wavelength conversion wheel device according to Embodiment 2 will be described with reference to FIGS. 9 to 10B. 9 to 10B, the same reference numerals are given to the same components as in the first embodiment. Also, overlapping explanations are omitted.

[2-1. Constitution]
[2-1-1. Configuration of lighting device]
FIG. 9 is a schematic diagram showing the configuration of an illumination device 200 including a wavelength conversion wheel device 290 according to Embodiment 2. As shown in FIG. The illumination device 200 of FIG. 9 includes a wavelength conversion wheel device 290 instead of the wavelength conversion wheel device 190 of the illumination device 100 of FIG. Moreover, in the illumination device 200, the driving method of the blue laser diodes 101a to 101e is different from that in the illumination device 100. FIG.

FIG. 10A is a view showing the front face 192a of the wavelength conversion wheel assembly 290 of FIG. FIG. 10B is a view showing the rear face 192b of the wavelength conversion wheel assembly 290 of FIG. The wavelength conversion wheel device 290 includes a wavelength converter 191A in place of the wavelength converter 191 of FIG. 2A. The wavelength converter 191A includes a green phosphor 191a, a red phosphor 191b, and a It includes a non-phosphor region 191c. These three regions are arranged in the angular direction θ. The green phosphor 191a is excited by the irradiated blue light to generate green fluorescence. The red phosphor 191b is excited by the irradiated blue light to generate red fluorescence. No phosphor is formed in the non-phosphor region 191c. Thus, the green phosphor 191a and the red phosphor 191b of the wavelength converter 191A generate light having a wavelength different from that of the incident light.

In the illumination device 200 of FIG. 9, the blue light emitted in the -Y direction from the blue laser diodes 101a to 101c is collimated by the collimating lenses 102a to 102c, the lenses 13 and 14, and the diffusion Through plate 15 , dichroic mirror 16 , and lenses 17 and 18 , it enters wavelength conversion wheel assembly 290 .

The blue light incident on the wavelength conversion wheel device 290 irradiates the wavelength converter 191A. The motor 194 rotates the base material 192 in the same manner as in the illumination device 100 of FIG. By rotating the wavelength converter 191A, the position where the blue light is incident on the wavelength converter 191A changes with time. Therefore, the blue light alternately irradiates the green phosphor 191a, the red phosphor 191b, and the non-phosphor region 191c. In addition, since the position where the blue light is incident on the wavelength converter 191A changes with time, the area of the wavelength converter 191A heated by the blue light can be expanded. Thereby, even when the energy of the irradiated blue light is high, it is possible to suppress the temperature rise of the green phosphor 191a and the red phosphor 191b.

As described above, the green phosphor 191a is excited by the irradiated blue light to generate green fluorescence. The red phosphor 191b is excited by the irradiated blue light to generate red fluorescence. Most of the green light emitted by the green phosphor 191a and the red light emitted by the red phosphor 191b are emitted in the +Y direction. The green light and red light once emitted in the -Y direction are also reflected by the reflective film 193 formed on the substrate 192 and returned in the +Y direction. After that, the green light and red light pass through lenses 18 and 17 and enter dichroic mirror 16 . Since the dichroic mirror 16 reflects visible light other than blue light, the incident green light and red light are reflected by the dichroic mirror 16, travel in the +X direction, and converge on the incident surface of the rod integrator 24 via the lens 23. be done.

On the other hand, the blue light emitted from the blue laser diodes 101d and 101e in the +X direction passes through the collimator lenses 102d and 102e, the lens 20, the diffusion plate 21, the lens 22, the dichroic mirror 16, and the lens 23, and passes through the rod integrator 24. is focused on the incident surface of

The blue laser diodes 101a to 101c for exciting the green phosphor 191a and the red phosphor 191b, and the blue laser diodes 101d and 101e used as the light source of the blue light output from the illumination device 200 are exclusively Operate. When the blue laser diodes 101a-101c are turned on and their blue light illuminates the green phosphor 191a and the red phosphor 191b, the blue laser diodes 101d and 101e are turned off. On the other hand, when the non-phosphor region 191c is positioned to be illuminated by the blue laser diodes 101d and 101e, the blue laser diodes 101d and 101e are turned on and the blue laser diodes 101a-101c are turned off. As a result, the light emitted from the emission surface of the rod integrator 24 is switched to green light, red light, and blue light in order at a constant time cycle.

The green light, red light, and blue light emitted from the emission surface of the rod integrator 24 are temporally combined to form white light. Thus, the illumination device 200 obtains white light from the blue light of the blue laser diodes 101a-101e.

In this embodiment, red light is generated by red phosphor 191b, but yellow light may be generated by using a yellow phosphor instead of red phosphor 191b. In this case, a color wheel for extracting the red light component from the yellow light may be provided on the incident side or the exit side of the rod integrator 24 .

Further, in the present embodiment, the case where the green phosphor 191a region and the red phosphor 191b region are in contact with each other has been described, but a non-phosphor region may be further provided between the phosphor regions. .

Further, in the present embodiment, the case of forming two phosphor regions (the green phosphor 191a region and the red phosphor 191b region) on the substrate 192 has been described, but only one phosphor region is formed. may be used, and three or more phosphor regions may be formed. When forming only one phosphor region that emits yellow light, a color wheel for extracting red light and green light components from the yellow light may be provided on the incident side or the exit side of the rod integrator 24 . .

Also, instead of the blue laser diodes 101a to 101c, a laser that emits light in the ultraviolet region may be provided. In this case, the substrate 192 may be provided with a phosphor that emits blue light instead of the non-phosphor region 191c, and blue light may be emitted by irradiating this phosphor with light in the ultraviolet region. In this case, the components that generate blue light (the light guide optical system from the blue laser diodes 101d and 101e to the lens 22 in FIG. 9) may be removed from the illumination device 200 in FIG.

[2-1-2. Configuration of wavelength conversion wheel device]
As shown in FIG. 10B, the substrate 192 is formed with a plurality of openings 196 and a plurality of protrusions 197H, for example, similar to FIG. 7H. Each opening and each protrusion may be formed similarly to that shown in any of FIGS. 2B, 7A-7G, and 7I-8C instead of FIG. 7H.

[2-2. Action and effect]
According to the wavelength conversion wheel device 290 according to the present embodiment, the heat generated in the wavelength converter 191A is effectively dissipated by arranging the openings 196 and the projections 197H, as in the first embodiment. be able to.

[2-3. Summary of Embodiment 2]
A wavelength conversion wheel device 290 according to Embodiment 2 includes a base material 192, a wavelength converter 191A, a plurality of openings 196, and a plurality of projections 197H. The substrate 192 is rotatable around the rotation axis J. The wavelength converter 191A is formed on the base 192 on a circle having a predetermined radius from the rotation axis J, and generates light having a wavelength different from the wavelength of the incident light. A plurality of openings 196 are formed in the substrate 192 outside the wavelength converter 191A with respect to the radial direction r and periodically with respect to the angular direction .theta. A plurality of protrusions 197H are formed on the substrate 192 on the outside of the wavelength converter 191A with respect to the radial direction r and periodically with respect to the angular direction θ about the rotation axis J, and has a predetermined length with respect to

Thereby, the heat generated in the wavelength converter 191A can be effectively radiated.

The illumination device 200 according to Embodiment 2 includes a wavelength conversion wheel device 290, a motor 194, blue laser diodes 101a to 101e, and a light guide optical system. Motor 194 rotates wavelength conversion wheel assembly 290 . The blue laser diodes 101a-101e generate light at the excitation wavelength of the wavelength converter 191A. Part of the light guide optics guides the light generated by the blue laser diodes 101a-101c to the wavelength converter 191A.

As a result, the heat generated by the wavelength converter 191A can be effectively dissipated, so that the wavelength conversion wheel device 290 is less likely to deteriorate, and the illumination device 200 can be stably operated.

(Embodiment 3)
An illumination device equipped with a wavelength conversion wheel device according to Embodiment 3 will be described below with reference to FIGS. 11 to 15. FIG. 11 to 15, the same reference numerals are given to the same components as in the first and second embodiments. Also, overlapping explanations are omitted.

[3-1. Constitution]
[3-1-1. Configuration of lighting device]
FIG. 11 is a schematic diagram showing the configuration of an illumination device 300 including a wavelength conversion wheel device 390 according to Embodiment 3. As shown in FIG. The illumination device 300 of FIG. 11 includes a wavelength conversion wheel device 390 instead of the wavelength conversion wheel device 290 of the illumination device 200 of FIG. Further, in the illumination device 300, the components that generate blue light in the illumination device 200 (the light guide optical system from the blue laser diodes 101d and 101e to the lens 22 in FIG. 9) are removed, and the blue laser diodes 101a to 101c are replaced by It is used to excite the phosphor (described later) of the wavelength conversion wheel device 390 and is also used as a light source for blue light output from the lighting device 300 .

The illumination device 300 includes blue laser diodes 101a to 101c, collimating lenses 102a to 102c, lenses 13, 14, 17, 18, 23, 25, 26, 28, 30, 32, a diffusion plate 15, a dichroic mirror 16, and a wavelength conversion wheel. It comprises device 390, motor 194, rod integrator 24, and mirrors 27,29,31.

The wavelength conversion wheel device 390 includes the wavelength conversion wheel 310 shown in FIGS. 12A and 12B and the fin member 320 shown in FIG.

FIG. 12A is a diagram showing the front surface 192a of the wavelength conversion wheel 310 of the wavelength conversion wheel device 390 of FIG. FIG. 12B is a view showing the rear surface 192b of the wavelength converting wheel 310 of the wavelength converting wheel apparatus 390 of FIG. 13 is a perspective view showing the configuration of the fin member 320 of the wavelength conversion wheel device 390 of FIG. 11. FIG. FIG. 14A is a view showing the rear face 192b of the wavelength converting wheel assembly 390 of FIG. FIG. 14B is an exploded perspective view of the wavelength converting wheel assembly 390 of FIG.

The wavelength conversion wheel device 390 includes a wavelength converter 191B instead of the wavelength converter 191A of FIG. 10A. The wavelength converter 191B includes a green phosphor 191a, a red phosphor 191b and a It includes a transmissive window 191d. These three regions are arranged in the angular direction θ. Green phosphor 191a and red phosphor 191b of FIG. 12A are formed similarly to the corresponding phosphors of FIG. 10A. Transmissive window 191d is constructed by removing non-phosphor region 191c of FIG. Therefore, the transmissive window 191d is formed as an arcuate through hole.

In the illumination device 300 of FIG. 11, the blue light emitted in the -Y direction from the blue laser diodes 101a to 101c is collimated by the collimating lenses 102a to 102c, the lenses 13 and 14, and the diffusion Through plate 15 , dichroic mirror 16 , and lenses 17 and 18 , it enters wavelength conversion wheel assembly 390 .

The blue light incident on the wavelength conversion wheel device 390 irradiates the wavelength converter 191B. The motor 194 rotates the base material 192 in the same manner as in the illumination device 100 of FIG. By rotating the wavelength converter 191B, the position where the blue light is incident on the wavelength converter 191B changes with time. Therefore, the green phosphor 191a, the red phosphor 191b, and the transmissive window 191d are alternately irradiated with the blue light.

Hereinafter, the behavior of the wavelength converter 191B when blue light is irradiated will be described in the order described above.

First, when the green phosphor 191a is irradiated with blue light, the green phosphor 191a is excited by the irradiated blue light and emits green fluorescence. Most of the green light emitted by the green phosphor 191a is emitted in the +Y direction. The green light once emitted in the -Y direction is also reflected by the reflective film 193 formed on the substrate 192 and returned in the +Y direction. After that, the green light passes through lenses 18 and 17 and enters dichroic mirror 16 .

Subsequently, when the red phosphor 191b is irradiated with blue light, the red phosphor 191b is excited by the irradiated blue light and emits red fluorescence. Most of the red light emitted by the red phosphor 191b is emitted in the +Y direction. The red light once emitted in the -Y direction is also reflected by the reflective film 193 formed on the substrate 192 and returned in the +Y direction. After that, the red light passes through lenses 18 and 17 and enters dichroic mirror 16 .

Since the dichroic mirror 16 reflects visible light other than blue light, the incident green light and red light are reflected by the dichroic mirror 16, travel in the +X direction, and converge on the incident surface of the rod integrator 24 via the lens 23. be done.

Finally, when the transmission window 191d is irradiated with blue light, the blue light passes through the transmission window 191d and enters the lenses 25 and 26 arranged in the −Y direction of the wavelength conversion wheel device 390 in order. , parallelized light is emitted in the -Y direction. The light emitted from the lens 26 changes its traveling direction by a relay optical system composed of three mirrors 27, 29, 31 and three lenses 28, 30, 32. FIG. Finally, the blue light traveling in the +X direction that has been collimated again by the lens 32 is focused on the incident surface of the rod integrator 24 via the dichroic mirror 16 and the lens 23 .

The light emitted from the emission surface of the rod integrator 24 is switched in order to green light, red light, and blue light at regular time intervals. The green light, red light, and blue light emitted from the emission surface of the rod integrator 24 are temporally combined to form white light. Thus, the illumination device 300 obtains white light from the blue light of the blue laser diodes 101a-101c.

In this embodiment, red light is generated by red phosphor 191b, but yellow light may be generated by using a yellow phosphor instead of red phosphor 191b. In this case, a color wheel for extracting the red light component from the yellow light may be provided on the incident side or the exit side of the rod integrator 24 .

Also, in the present embodiment, the case where the region of green phosphor 191a and the region of red phosphor 191b are in contact with each other has been described, but a transmission window may be further provided between the phosphor regions.

Further, in the present embodiment, the case of forming two phosphor regions (the green phosphor 191a region and the red phosphor 191b region) on the substrate 192 has been described, but only one phosphor region is formed. may be used, and three or more phosphor regions may be formed. When only one phosphor region that emits yellow light is formed, a color wheel for extracting red light and green light components from the yellow light may be provided on the incident side or the exit side of the rod integrator 24. good.

[3-1-2. Configuration of wavelength conversion wheel device]
The configuration of the wavelength conversion wheel device 390 of this embodiment will be described below with reference to FIGS. 12A to 14B.

As noted above, wavelength conversion wheel apparatus 390 includes wavelength conversion wheel 310 . As shown in FIGS. 12A and 12B, wavelength conversion wheels 310 are periodically formed on substrate 192, inside wavelength converter 191B with respect to radial direction r, and with respect to angular direction θ about axis of rotation J. It further includes a plurality of openings 199 . Also, as shown in FIG. 12B, a plurality of openings 196 and a plurality of protrusions 197H are formed in the base material 192, for example, similarly to FIG. 7H. Each opening and each protrusion may be formed similarly to that shown in any of FIGS. 2B, 7A-7G, and 7I-8C instead of FIG. 7H. If each protrusion 197H extends from an area outside wavelength converter 191B to an area inside wavelength converter 191B with respect to radial direction r in substrate 192, the protrusion is eliminated in the area where transmissive window 191d is formed, as shown in FIG. 12B. be done.

The wavelength converting wheel device 390 further comprises a fin member 320 shown in FIG. The fin member 320 is attached to the rear surface 192b of the substrate 192 of the wavelength converting wheel 310, as shown in FIGS. 14A and 14B. As shown in FIG. 13, the fin member 320 includes a plurality of vanes 321, a plurality of apertures 322, a plurality of screw holes 323, and a central aperture 324. As shown in FIG. Each aperture 322, threaded hole 323, and aperture 324 in the fin member 320 has substantially the same shape, size, and relative position as that of each aperture 199, threaded hole 198, and aperture 195 in the substrate 192, respectively. is formed as As shown in FIG. 14A, the fin member 320 is arranged such that the positions of the openings 322, the screw holes 323, and the openings 324 correspond to the positions of the openings 199, the screw holes 198, and the openings 195 of the substrate 192, respectively. , attached to the substrate 192 . Further, as shown in FIG. 14B, the fin member 320 is attached to the base material 192 so that the surface opposite to the surface from which the blades 321 protrude is in contact with the rear surface 192b of the base material 192. As shown in FIG. Each vane 321 of the fin member 320 is positioned inside the wavelength converter 191B with respect to the radial direction r and periodically with respect to the angular direction θ about the rotation axis J when the fin member 320 is attached to the base material 192 It is formed. Each vane 321 of the fin member 320 has a predetermined length with respect to the radial direction r around the rotation axis J when the fin member 320 is attached to the base material 192 . Fin member 320 and substrate 192 are secured to motor 194 by inserting screws (not shown) from front surface 192 a of substrate 192 through screw holes 198 and 323 .

In this manner, fin member 320 rotates integrally with substrate 192 . When the base 192 is rotated by the motor 194 and the blades 321 of the fin member 320 are also rotated, the blades 321 also generate an air flow from the center of the base 192 toward the outer circumference.

The fin member 320 is formed by bending a stainless steel plate, for example. Specifically, a blade 321 is formed by cutting a portion of a stainless flat plate and bending that portion as shown in FIG. Thereby, the fin member 320 can be configured at low cost.

In this specification, the opening 199 and the opening 322 are also called "second openings", and the blades 321 are also called "second projections".

[3-2. Action and effect]
Next, with reference to FIG. 15, effects obtained by such arrangement of the opening 199, the opening 322, and the blades 321 will be described. FIG. 15 is a schematic cross-sectional view of the wavelength conversion wheel device 390 of FIG.

As in Embodiments 1 and 2, by forming the opening 196 and the projection 197H, in the opening 196, the wind Wa1 flowing from the front surface 192a toward the rear surface 192b or the wind Wb1 flowing from the rear surface 192b toward the front surface 192a occurs.

In the present embodiment, in addition to the wind Wa1 or Wb1 described above, at the opening 322 of the fin member 320 and the opening 199 of the base material 192, the wind Wa2 flowing from the front surface 192a toward the rear surface 192b, or the wind Wa2 flowing from the rear surface 192b to the front surface 192a Wind Wb2 flowing toward is also generated. The mechanism for generating the winds Wa2 and Wb2 is the same as the mechanism for generating the winds Wa1 and Wb1 at the opening 196. However, in the present embodiment, the openings 322 and 199 are formed in the entire area in front of the blades 321 with respect to the rotational direction of the base member 192. Since it is positioned, a wind Wb2 is generated.

The wind Wa1 or Wb1, the wind Wa2 or the wind Wb2 thins the temperature boundary layer around the substrate 192, thereby improving the heat radiation performance of the substrate 192. FIG.

In this embodiment, in addition to the temperature boundary layer being thin in the vicinity of the opening 196, the temperature boundary layer is also thin in the vicinity of the opening 199. Better performance.

Although stainless steel is used as the material for the fin member 320 in the present embodiment, the material is not limited to this. For example, an iron plate or a copper plate may be used as the material of the fin member, and the surface of the fin member may be plated. Alternatively, the fin member 320 may be manufactured using a rigid body having good thermal conductivity, and this member may be attached to the rear surface 192b of the base material 192 with an adhesive or the like. Alternatively, the base material 192 and the fin member 320 may be integrally formed.

[3-3. Summary of Embodiment 3]
A wavelength conversion wheel device 390 according to Embodiment 3 includes a base material 192, a wavelength converter 191B, a plurality of openings 196, and a plurality of projections 197H. The substrate 192 is rotatable around the rotation axis J. The wavelength converter 191B is formed on the base 192 on a circle having a predetermined radius from the rotation axis J, and generates light having a wavelength different from the wavelength of the incident light. A plurality of apertures 196 are periodically formed in the substrate 192 outside the wavelength converter 191B with respect to the radial direction r and with respect to the angular direction θ about the rotation axis J. As shown in FIG. A plurality of protrusions 197H are formed on the substrate 192 on the outside of the wavelength converter 191A with respect to the radial direction r and periodically with respect to the angular direction θ about the rotation axis J, and has a predetermined length with respect to

Thereby, heat generated in the wavelength converter 191B can be effectively dissipated.

The wavelength conversion wheel device 390 according to the third embodiment is arranged on the substrate 192 inside the wavelength converter 191B with respect to the radial direction r around the rotation axis J and periodically with respect to the angular direction θ around the rotation axis J. It further includes a plurality of openings 199, 322 formed therein.

Thereby, the heat dissipation effect of the base material 192 can be improved.

The wavelength conversion wheel device 390 according to the third embodiment is provided on the substrate 192 inside the wavelength converter 191B with respect to the radial direction r around the rotation axis J and periodically with respect to the angular direction θ around the rotation axis J. , and has a plurality of vanes 321 having a predetermined length in a radial direction about the axis J of rotation.

Thereby, the heat dissipation effect of the base material 192 can be improved.

The illumination device 300 according to Embodiment 3 includes a wavelength conversion wheel device 390, a motor 194, blue laser diodes 101a to 101c, and a light guide optical system. Motor 194 rotates wavelength conversion wheel assembly 390 . The blue laser diodes 101a-101c generate light at the excitation wavelength of the wavelength converter 191B. Part of the light guide optics guides the light generated by the blue laser diodes 101a-101c to the wavelength converter 191B.

As a result, the heat generated by the wavelength converter 191B can be effectively dissipated, so that the wavelength conversion wheel device 390 is less likely to deteriorate, and the illumination device 300 can be stably operated.

In the wavelength conversion wheel device 190 according to Embodiment 1 or the wavelength conversion wheel device 290 according to Embodiment 2, similarly to the wavelength conversion wheel device 390 according to Embodiment 3, a plurality of openings 199, 322 and/or a plurality of You may further provide the blade|wing 321 of.

(Embodiment 4)
[4-1. Configuration of Projection Display Device]
Next, with reference to FIG. 16, the configuration of a projection-type image display device using lighting device 300 of Embodiment 3 will be described.

FIG. 16 is a schematic diagram showing a projection-type image display device equipped with illumination device 300 having wavelength conversion wheel device 390 according to the fourth embodiment. The projection-type image display apparatus of FIG. 16 includes an illumination device 300, mirrors 35 and 36, lenses 33 and 34, an optical modulation element 37, and a projection lens 38.

Since the illumination device 300 in FIG. 16 is configured in the same manner as the illumination device 300 in FIG. 11, the details thereof will be omitted, and the components after the rod integrator 24 and the behavior of the emitted light will be described.

The white light emitted from the rod integrator 24 passes through lenses 33 and 34 forming a relay optical system, is reflected by mirrors 35 and 36 , and enters an optical modulation element 37 . The optical modulator 37 is, for example, a DMD (digital micromirror device). The light incident on the light modulation element 37 is modulated by the image signal in the light modulation element 37 to generate image light. The image light generated by the light modulation element 37 is emitted in the +Y direction, magnified by a projection lens 38, which is a projection optical system, and projected onto a screen (not shown).

16 may include lighting device 200 in FIG. 9 instead of lighting device 300 in FIG. Alternatively, a projection-type image display apparatus may be constructed that includes the illumination device 100 of FIG.

[4-2. Summary of Embodiment 4]
A projection-type image display apparatus according to a fourth embodiment modulates the illumination light output from the illumination apparatuses 100 to 300 according to the first to third embodiments and the illumination light output from the illumination apparatuses in accordance with a video signal to generate image light. It has an optical modulation element 37 and a projection optical system for projecting image light.

As a result, the heat generated by the wavelength converter 191B can be effectively dissipated, so that the wavelength conversion wheel device 390 is less likely to deteriorate, and the projection display apparatus can be stably operated.

(Other embodiments)
As described above, Embodiments 1 to 4 have been described as examples of the technology according to the present disclosure. However, the technology according to the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like. Also, it is possible to combine the constituent elements described in the first to fourth embodiments to form a new embodiment.

Radial protrusions do not have to be provided in similar shapes all around. For example, since the transmissive window does not require cooling, the protrusions around it may be omitted. Moreover, in order to balance the weight of the wavelength conversion wheel device, a part of the protrusion may be removed by cutting or the like.

Further, in the described embodiment, the phosphor is arranged only on the front surface of the substrate, but the phosphor may be formed on both the front surface and the rear surface of the substrate.

A wavelength conversion wheel device according to an aspect of the present disclosure can be applied to a lighting device of a projection display device. As an example of the present disclosure, the description has been made with reference to the lighting device of the projection display device, but the lighting device according to the aspect of the present disclosure is not limited to this, and may be a lighting device such as a headlamp. good too.

100, 200, 300... lighting device,
101a to 101e ... blue laser diodes,
102a to 102e ... collimating lenses,
13, 14, 17, 18, 20, 22, 23, 25, 26, 28, 30, 32, 33, 34... lenses,
15, 21... diffusion plate,
16... dichroic mirror,
24 ... rod integrator,
27, 29, 31, 35, 36...mirrors,
37 ... light modulation element,
38 ... projection lens,
190, 290, 390 ... wavelength conversion wheel device,
191, 191A, 191B... wavelength converters,
192 ... base material,
192a... Front,
192b... rear surface,
193... Reflective film,
194... motor,
195 ... opening,
196, 196A to 196O ... openings,
197, 197A to 197O ... projections,
198 ... screw hole,
199 ... opening,
191a ... Green phosphor,
191b ... red phosphor,
191c... non-phosphor region,
191d... transparent window,
310... wavelength conversion wheel,
320... Fin member,
321 feathers,
322 ... opening,
323 ... screw hole,
324... Opening.

Claims (7)

a substrate rotatable about an axis of rotation;
a wavelength converter formed on the base on a circumference having a predetermined radius from the rotation axis and generating light having a wavelength different from that of incident light;
a plurality of first apertures formed in the substrate outside the wavelength converter in radial directions about the axis of rotation and periodically in angular directions about the axis of rotation;
formed on the substrate outside the wavelength converter with respect to the radial direction about the axis of rotation and periodically with respect to the angular direction about the axis of rotation; a plurality of radial first projections having a length,
Wavelength conversion wheel device. Each of the first openings is formed rearwardly with respect to the rotation direction of the base material among a pair of first projections adjacent to each other and spaced apart by a unit period with respect to the angular direction around the rotation axis. Formed closer to the first projection formed forward in the rotation direction of the base than the projection,
The wavelength conversion wheel device according to claim 1. Each of the first projections is formed on a surface of the base material different from the surface on which the wavelength converter is formed, and each of the first projections is arranged on a surface of the base material that is different from the surface on which the wavelength converter is formed. extending from an outer region of the converter to a region in which the wavelength converter is formed, or from an outer region of the wavelength converter to an inner region with respect to a radial direction about the axis of rotation;
3. The wavelength conversion wheel device according to claim 1 or 2. further comprising a plurality of second openings formed in the substrate inside the wavelength converter in radial directions about the axis of rotation and periodically in angular directions about the axis of rotation;
The wavelength conversion wheel device according to any one of claims 1-3 . In the base material, formed inside the wavelength converter with respect to the radial direction around the rotation axis and periodically with respect to the angular direction around the rotation axis, and having a predetermined radial direction around the rotation axis a plurality of second projections having a length;
The wavelength conversion wheel device according to one of claims 1-4 . a wavelength conversion wheel device according to one of claims 1 to 5 ;
a driving device for rotating the wavelength conversion wheel device;
a light source element for generating light at an excitation wavelength of the wavelength converter;
a light guiding optical system for guiding the light generated by the light source element to the wavelength converter,
lighting device. a lighting device according to claim 6 ;
a light modulation element that modulates illumination light output from the lighting device according to a video signal to generate video light;
a projection optical system that projects the image light,
Projection type image display device.

Images