WO2021157366A1 - Display device and display method - Google Patents

Abstract

The present disclosure relates to a display device and a display method by which an image that is a virtual image projected so as to float in a background is made visible as a real image. A first transparent screen having an ultra-short throw and a second transparent screen having a function as a half-mirror are provided opposite each other, an image is projected by a projector onto the first transparent screen from an end of the second transparent screen, and the first transparent screen reflects the projected image to the second transparent screen. The second transparent screen reflects the image reflected by the first transparent screen to the first transparent screen, while allowing for passage therethrough of incident light of the background from the back side with respect to the surface provided with the first transparent screen. The first transparent screen allows for passage therethrough of the image reflected by the second transparent screen and the incident light of the background from the back side of the second transparent screen. The present disclosure is applicable to a display apparatus.

Description

Display device and display method

The present disclosure relates to a display device and a display method, and more particularly to a display device and a display method in which a virtual image is projected so that the image can be viewed as if it were a real image with high reality.

A technique has been proposed in which a virtual image is projected using a transparent screen so that the image can be viewed as if a real image exists (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-187276

However, when projecting on a transparent screen including those for ultra-short focus, it is recognized that the projected image is stuck on the screen surface, and the reality is subjectively insufficient.

In order to solve such a lack of reality, it is conceivable to realize aerial projection using Pepper's Ghost, but the equipment will be large.

In addition, in the configuration using Pepper's Ghost, the original projected image may be visible, and depending on the installation location, for example, the contrast may be reduced when the ambient light hits the screen, which is affected by the lighting environment. The reality of the viewed image is reduced.

In addition, there is also a configuration such as HUD (Head Up Display) in which two screens are placed facing each other at different positions and the overall size is reduced by increasing the magnification between the two screens. In this case, since the viewing position range of the user is narrow, it is difficult to realize it except in the case where the position is fixed like a car.

This disclosure was made in view of such a situation, and in particular, in a small configuration, a virtual image is projected so that it can be viewed as a highly realistic real image.

The display device on one side of the present disclosure includes a first transparent screen, a second transparent screen provided so as to face substantially parallel to the first transparent screen, the first transparent screen, and the first transparent screen. The first transparent screen is provided with a projector provided between the two transparent screens and projecting an image on the back side of the first transparent screen facing the second transparent screen. The image projected by the projector is reflected toward the front side of the second transparent screen, and the second transparent screen reflects the image reflected by the first transparent screen on the front side. The first transparent screen is forward-reflected and the incident light of the background incident from the back side is transmitted, and the first transparent screen is projected by the projector and reflected by the second transparent screen. It is a display device that transmits an image and the incident light of the background transmitted from the back side of the second transparent screen.

The display method of one aspect of the present disclosure includes a first transparent screen, a second transparent screen provided so as to face substantially parallel to the first transparent screen, the first transparent screen, and the first transparent screen. A display method for a display device provided between two transparent screens and provided with a projector for projecting an image on the back side of the first transparent screen facing the second transparent screen. The first transparent screen reflects the image projected by the projector toward the front side of the second transparent screen, and the second transparent screen is the first transparent screen on the front side. The image reflected by the transparent screen is positively reflected on the first transparent screen, and the incident light of the background incident from the back side is transmitted. The first transparent screen is projected by the projector, and the first transparent screen is projected. This is a display method for transmitting the image reflected by the transparent screen 2 and the incident light of the background transmitted through the second transparent screen from the back side.

In one aspect of the present disclosure, a first transparent screen, a second transparent screen provided so as to face substantially parallel to the first transparent screen, the first transparent screen, and the second transparent screen. A projector that is provided between the transparent screen and projects an image on the back side of the first transparent screen facing the second transparent screen is provided, and the first transparent screen provides the above-mentioned. The image projected by the projector is reflected in the direction toward the front side of the second transparent screen, and the image reflected by the second transparent screen on the front side by the first transparent screen is described. The incident light of the background incident from the back side is transmitted while being positively reflected by the first transparent screen, projected by the projector by the first transparent screen, and reflected by the second transparent screen. The image and the incident light of the background transmitted through the second transparent screen from the back side are transmitted.

It is a figure explaining the outline of this disclosure. It is a figure explaining the structural example of the 1st Embodiment of the display device of this disclosure. It is a figure explaining the 1st configuration example of a transparent screen 51. It is a figure explaining the 2nd configuration example of a transparent screen 51. It is a figure explaining the function realized by the display device of FIG. It is a flowchart explaining the display process of the display device of FIG. It is a figure explaining the 1st modification of 1st Embodiment. It is a figure explaining the 1st modification of 1st Embodiment. It is a figure explaining the 2nd modification of 1st Embodiment. It is a figure explaining the 2nd modification of 1st Embodiment. It is a figure explaining the 3rd modification of 1st Embodiment. It is a figure explaining the configuration example of a projector. It is a figure explaining the structural example of the display part in the 2nd Embodiment of the display device of this disclosure. It is a figure explaining the function realized by the display device of FIG. It is a flowchart explaining the display process of the display device of FIG. It is a figure explaining the modification of the 2nd Embodiment. It is a figure explaining the structural example of the display part in 3rd Embodiment of the display device of this disclosure. It is a figure explaining the function realized by the display device of FIG. It is a flowchart explaining the display process of the display device of FIG. It is a figure explaining the modification of the 3rd Embodiment. It is a figure explaining the configuration example of the general-purpose personal computer.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

Hereinafter, modes for implementing the present technology will be described. The explanation will be given in the following order.
1. 1. Outline of the present disclosure 2. First Embodiment 3. Second embodiment 4. Third embodiment 5. Example to be executed by software

<< 1. Summary of the present disclosure >>
The present disclosure is to project a virtual image in a small configuration so that it can be viewed as a highly realistic real image.

First, the outline of this disclosure will be described.

FIG. 1 is a side view for explaining the outline of the display device of the present disclosure.

The display device of the present disclosure is composed of, for example, transparent screens SC1 and SC2 and a projector PJ as shown in FIG.

The projector PJ is provided between the transparent screens SC1 and SC2 arranged so that the surfaces formed by the projectors PJ face each other so as to be substantially parallel to each other, and at a position closer to the transparent screen SC2 side.

Further, the projector PJ projects an image on the transparent screen SC1 as shown by the arrow L1 direction in the drawing.

The transparent screen SC1 functions as a transparent screen composed of a projection surface corresponding to ultra-short focus, and the projection surface of the transparent screen SC2 facing the direction of the arrow L2 as shown in the direction of the arrow L2. It functions as a reflection mirror that reflects light so that it is incident substantially perpendicular to the screen.

The transparent screen SC2 functions as a half mirror or a hologram as well as a transparent screen, and a part of the light incident in the direction of the arrow L3 constituting the image reflected by the transparent screen SC1 is a transparent screen. Specular reflection on SC1.

The transparent screen SC1 functions as a transparent screen with respect to the light constituting the image incident substantially perpendicular to the direction of the arrow L3, and transmits the transparent screen in the direction of the user H1 who is a viewer.

Further, since the transparent screens SC1 and SC2 also function as transparent screens, the light on the background side of the transparent screens SC1 and SC2 when viewed from the user H1 is in the right direction in the drawing indicated by the arrow L4. Is also transparent.

As a result, the user H1 simultaneously uses the light from the arrow L4 direction forming the background of the transparent screens SC1 and SC2 and the light forming the image projected by the projector PJ and reflected in the order of the arrows L1, L2, L3. You will watch it.

As a result, according to the display device of the present disclosure, the user H1 has the reality that the image projected as a virtual image from the projector PJ appears in the background consisting of the real image on the back side of the transparent screens SC1 and SC2. It becomes possible to view it as a certain image.

Further, according to the display device of the present disclosure, since the projector PJ is provided between the transparent screens SC1 and SC2, that is, it is not provided outside the transparent screens SC1 and SC2, the device configuration can be miniaturized. It will be possible.

Further, since the transparent screen SC1 is compatible with ultra-short focus, the distance from the projector PJ can be shortened, so that the distance between the transparent screens SC1 and SC2 can be shortened, and the device configuration can be made thin. It becomes possible to make it.

<< 2. First Embodiment >>
Next, a first embodiment of the display device of the present disclosure will be described with reference to FIG.

The display device 11 of FIG. 2 is composed of an information processing unit 31 and a display unit 32.

The information processing unit 31 controls the entire operation of the display device 11 and also controls the operation related to the display of the display unit 32.

The detailed configuration of the information processing unit 31 will be described later with reference to FIG.

The display unit 32 is controlled by the information processing unit 31 so that the user 33, who is a viewer, can view the image as a realistic image that appears in the background of the transparent screens 51 and 52, which are real images. An image that is a virtual image is projected onto the screen.

More specifically, the display unit 32 is composed of transparent screens 51 and 52 and a projector 53.

The transparent screens 51 and 52 and the projector 53 have configurations corresponding to the transparent screens SC1 and SC2 and the projector PJ of FIG. 1, respectively.

That is, the transparent screens 51 and 52 have substantially the same size, and the surfaces formed by the transparent screens 51 and 52 are arranged so as to face each other so as to be substantially parallel to each other.

Further, the projector 53 is provided between the transparent screens 51 and 52, on the transparent screen 52 side, and at a position close to any of the end portions of the transparent screen 52, in the direction of arrow L11 in the drawing. The light that constitutes the image is projected onto the transparent screen 51.

The transparent screen 51 functions as a transparent screen composed of a projection surface corresponding to ultra-short focus, and also functions as a mirror, so that the light constituting the image projected from the direction of arrow L11 is indicated by the direction of arrow L12. It is reflected so as to be incident substantially perpendicular to the projection surface of the transparent screen 52.

The transparent screen 52 functions as a half mirror as well as a transparent screen, and a part of the light constituting the image incident from the direction of the arrow L12 reflected by the transparent screen 51 is indicated by the arrow L13. In addition, it is specularly reflected on the transparent screen 51.

Further, since the transparent screen 52 functions as a half mirror, a part of the light from the direction of the arrow L14 constituting the background which is the real image on the back side of the transparent screens 51 and 52 when viewed from the user 33 is transferred to the transparent screen 51. Make it transparent.

At this time, the transparent screen 51 receives the light in the direction of the arrow L13, which constitutes the image positively reflected by the transparent screen 52, and the light of the arrow L14, which constitutes the background which is the real image on the back side of the transparent screens 51 and 52. , It is transmitted in the direction of the user 33 who is the viewer.

As a result, the user 33 includes the light that constitutes the background that is the real image on the back side of the transparent screens 51 and 52, and the light that constitutes the image projected by the projector PJ and reflected in the order of the arrows L11, L12, and L13. Can be viewed at the same time.

At this time, the user 33 displays the image projected by the projector 53 at a distance D2 (= distance D1 of 2) from the transparent screen 52 to the transparent screen 51 on the back side by a distance substantially the same as the distance D1 between the transparent screens 51 and 52. It is viewed as a virtual image as if it were projected on a virtual transparent screen 51'configured at the position of double).

That is, the user 33 views the image projected on the virtual transparent screen 51'that does not exist as a virtual image that emerges in the background consisting of the real image on the back side of the transparent screens 51 and 52.

As a result, according to the display device 11, the user 33 has the image as a virtual image projected from the projector 53 emerged in the background consisting of the real image on the back side of the transparent screens 51 and 52, which is high reality. It is possible to view the image as a provided image.

Further, according to the display device 11, since the projector 53 is provided between the transparent screens 51 and 52, that is, is not provided outside between the transparent screens 51 and 52, the device configuration can be miniaturized. It will be possible.

Further, since the transparent screen 51 is compatible with ultra-short focus, the distance from the projector 53 can be shortened, so that the distance between the transparent screens 51 and 52 can be shortened, and the device configuration can be made thin. It becomes possible to make it.

<First configuration example of the transparent screen 51>
Next, a first configuration example of the transparent screen 51 will be described with reference to FIG.

FIG. 3 is a side view seen from the same direction as the transparent screen 51 in the display unit 32 of FIG. 2, and the transparent screen 51 of FIG. 3 is a support base material 71, a microprism sheet 72, and a reflective film 73 from the left in the drawing. , A protective layer 74, and an AR (Anti Reflection) coat 75.

The support base material 71 is composed of a transparent base material and supports the transparent screen 51.

The microprism sheet 72 is formed on the back side (right side in the drawing) of the support base material 71 as viewed from the user 33.

The microprism sheet 72 has an uneven surface formed on the back surface side, and a reflective film 73 is formed on the surface of the uneven surface.

As for the angle of the uneven surface of the microprism sheet 72, as described with reference to FIG. 2, the incident light from the direction of the arrow L11 forming the image projected by the projector 53 is incident on the transparent screen 52 substantially vertically. It reflects in the direction of arrow L12.

A protective layer 74 that protects the surface of the transparent screen 51 is formed on the back surface side of the reflective film 73.

An AR (Anti Reflection) coating 75 is applied to the back surface side of the protective layer 74, and reflection of incident light from the back surface side, for example, from the directions of arrows L13 and L14 in FIG. 2 is suppressed.

With the configuration shown in FIG. 3, the transparent screen 51 reflects the incident light constituting the image projected from the projector 53 in the direction of arrow L11 so as to be substantially perpendicular to the transparent screen 52 in the direction of arrow L12.

Further, the transparent screen 51 of FIG. 3 reflects light that constitutes an image from the direction of arrow L13 reflected from the transparent screen 52 and light that constitutes a background transmitted through the transparent screen 52 from the direction of arrow L14. It is suppressed and transmitted to the front surface on the left side in the figure in which the user 33 is present.

<Second configuration example of the transparent screen 51>
Next, a second configuration example of the transparent screen 51 will be described with reference to FIG. The second configuration example of the transparent screen 51 also has the same function as the first configuration example of the transparent screen 51. The configurations having the same functions are designated by the same reference numerals, and the description thereof will be omitted.

That is, the transparent screen 51 of FIG. 4 is composed of the support base material 71, the hologram sheet 81, the reflective film 73, the protective layer 74, and the AR coat 75 from the left, instead of the micro prism sheet 72 in the first configuration example. , The difference is that the hologram sheet 81 is provided.

The hologram sheet 81 basically has the same function as the microprism sheet 72, a diffraction grating corresponding to the uneven surface of the microprism sheet 72 is formed on the back side, and a reflective film 73 is formed on the surface. ing.

Even in the configuration shown in FIG. 4, the transparent screen 51 reflects the incident light constituting the image projected from the projector 53 in the direction of arrow L11 so as to be substantially perpendicular to the transparent screen 52 in the direction of arrow L12. ..

Further, the transparent screen 51 of FIG. 4 suppresses the reflection of the image light from the arrow L13 direction reflected from the transparent screen 52 and the light forming the background transmitted through the transparent screen 52 from the arrow L14 direction. Then, the light is transmitted to the front on the left side in the figure in which the user 33 is present.

The transparent screen 51 may have any of the configurations shown in FIGS. 3 and 4, but each of them is an example of the configuration, and may have other configurations as long as it has the same function.

<Structure example of the information processing unit in the first embodiment>
Next, a configuration example of the information processing unit 31 of the display device 11 according to the first embodiment will be described with reference to FIG.

The information processing unit 31 of FIG. 5 is composed of an operation input unit 101, an information acquisition unit 102, an analysis unit 103, a control unit 104, and a storage unit 105.

The operation input unit 101 is composed of at least one of a keyboard, a mouse, a touch panel, operation buttons, and various devices operated when the user specifies various contents displayed by the display unit 32. The mouse generates an operation signal according to the operation input and supplies it to the information acquisition unit 102.

The information acquisition unit 102 is an operation signal supplied from the operation input unit 101, a sensor signal composed of detection results of various sensors supplied from a sensor unit 111 composed of various external sensors, and a storage unit. Various information stored in the 105 and required for the analysis process by the analysis unit 103 is acquired and supplied to the analysis unit 103.

The analysis unit 103 determines whether or not there is an instruction to play or stop the content, and the content to be played when the content is instructed to play, based on the operation signal, the sensor signal, and various information required for the analysis process. Analyze the type and the contrast and illuminance when displaying the content.

Then, the analysis unit 103 generates control information for specifically controlling the operation of the projector 53 of the display unit 32 based on the analysis result, and supplies the control information to the control unit 104.

The control unit 104 controls the projector 53 of the display unit 32 based on the control information supplied from the analysis unit 103 to project an image of the content.

The storage unit 105 is composed of an HDD (Hard Disc Drive) and an SSD (Solid State Drive), and writes or reads various data and programs in response to a request from the information acquisition unit 102. Further, the storage unit 105 may be configured by an external server or the like via a network.

The sensor unit 111 is configured inside or outside the information processing unit 31 and is necessary for selecting the brightness and content of the projected image such as an illuminance sensor that detects the state of ambient light provided with the display device 11. It is composed of sensors that detect various types of information, and supplies the sensor signal, which is the detection result, to the information acquisition unit 102 of the information processing unit 31.

For example, when the display device 11 is used as an in-vehicle device provided in a vehicle or the like, the sensor unit 111 is composed of a sensor or the like for detecting the illuminance in the vehicle, and the display device 11 is used as a device provided indoors or the like. In some cases, it may consist of sensors that detect indoor illuminance.

<Display processing by the display device of FIG. 5>
Next, the display process by the display device 11 of FIG. 5 will be described with reference to the flowchart of FIG.

In step S11, the analysis unit 103 analyzes the operation signal according to the operation content acquired by the information acquisition unit 102 when the operation input unit 101 is operated by the user, and determines whether or not the playback of the content is instructed. do.

If the content is instructed to be played in step S11, the process proceeds to step S12.

In step S12, the analysis unit 103 analyzes the operation signal acquired by the information acquisition unit 102, identifies the content to be reproduced, and provides the information acquisition unit 102 with the content data for reproducing the specified content. Request and get.

At this time, the information acquisition unit 102 accesses the storage unit 105 to read the content data of the content to be reproduced in response to the request from the analysis unit 103, and supplies the content data to the analysis unit 103.

In step S13, the analysis unit 103 acquires environmental information when projecting an image of the content, such as the illuminance of the ambient light supplied from the sensor unit 111, which is supplied via the information acquisition unit 102, as a sensor signal.

In step S14, the analysis unit 103 analyzes the environmental information based on the acquired sensor signal, and specifies the display conditions such as the brightness and contrast of the image when projecting the image of the content.

In step S15, the analysis unit 103 outputs the control signal and the content data according to the specified display condition to the control unit 104.

In step S16, the control unit 104 controls the projector 53 based on the control signal, adjusts the contrast and brightness, and projects an image according to the content data.

In step S17, the analysis unit 103 determines whether or not the end of content reproduction is instructed, or whether or not the content reproduction itself has ended, and if not, the process returns to step S13.

That is, the processes of steps S13 to S17 are repeated until the end of the reproduction of the content is instructed or the reproduction of the content itself is completed.

Then, in step S17, when the end of the content reproduction is instructed or the content reproduction itself is completed, the process proceeds to step S18.

In step S18, the analysis unit 103 determines whether or not the end of the display process is instructed by turning off the power or the like, and if the end is not instructed, the process returns to step S11.

That is, the processes of steps S11 to S18 are repeated until the end of the display process is instructed.

Then, when the end of the display process is instructed in step S18, the process ends.

As a result, the image of the content is projected from the projector 53, and the virtual image can be displayed via the transparent screens 51 and 52 so as to emerge in the background consisting of the real image.

As a result, by displaying the virtual image so that it emerges in the background consisting of the real image, it becomes possible for the user to view it as if it were a real image with high reality as a whole.

<First modification of the first embodiment>
In the above, when ambient light is incident from the surroundings between the transparent screens 51 and 52, for example, it is reflected by the transparent screen 52, passes through the transparent screen 51, and is viewed by the user 33, so that the transparent screens 51 and 52 are viewed. There is a possibility that it will be reflected in the background of the screen and viewed.

Therefore, the entire outer peripheral portion between the transparent screens 51 and 52 may be shielded from light.

That is, for example, as shown in FIG. 7, when the ambient light in the direction of the arrow L51 is incident on the surface of the transparent screen 51 between the transparent screens 51 and 52 on the transparent screen 51 side, it is reflected in the direction of the arrow L52 and is incident on the transparent screen 52. Further, it is conceivable that the light is reflected by the transparent screen 52, is reflected in the direction of the arrow L53, is transmitted through the transparent screen 51, and is viewed by the user.

Further, for example, as shown in FIG. 7, when the ambient light in the direction of arrow L61 is incident on the surface of the transparent screen 52 between the transparent screens 51 and 52, it is reflected in the direction of arrow L62 and passes through the transparent screen 51. It is conceivable that the user will watch it.

In either case, the light that constitutes the image projected by the projector 53 from the direction of the arrow L13 and the light that constitutes the background from the direction of the arrow L14 may be viewed by the user 33, causing reflection due to ambient light. was there.

Therefore, as shown in FIG. 8, light-shielding walls 131-1 to 131-4 are provided so as to surround the upper surface portion, the side surface portion, and the lower surface portion formed between the ends of the rectangular transparent screens 51 and 52. You may be able to do it.

With the configuration shown in FIG. 8, the light-shielding walls 131-1 to 131-4 prevent ambient light from entering between the transparent screens 51 and 52, so that the influence of the ambient light on the image appearing in the background It is possible to suppress the reflection caused by the image, and it is possible to enhance the reality of the image viewed as a virtual image that emerges in the background consisting of the real image.

<Second variant of the first embodiment>
In the above, the light-shielding walls 131-1 to 131-4 are provided so as to surround the upper surface portion, the side surface portion, and the lower surface portion formed between the ends of the rectangular transparent screens 51 and 52. An example of suppressing reflection due to light incident has been described.

However, there is a risk that the reflection due to the ambient light entering the transparent screen 51 from the user 33 side cannot be suppressed.

Therefore, by providing an absorption-type polarizing plate and a QWP (Quarter Wave Plate: 1/4 wave plate) in front of the transparent screen 51, it is possible to suppress reflection of ambient light from the front of the transparent screen 51. good.

More specifically, for example, as shown in FIG. 9, the absorption type polarizing plate 151 and the QWP152 are provided in the front stage of the transparent screen 51 (the user 33 side of the transparent screen 51), and the environment from the user 33 side. The reflection by light may be suppressed.

Here, the absorption type polarizing plate 151 absorbs and removes the horizontal polarization component of the incident light, and transmits the vertical polarization component.

In addition, QWP152 converts a linearly polarized light component into a circularly polarized light component by adding a phase difference of 90 degrees to two orthogonal polarized light components.

More specifically, as shown in FIG. 10, the absorption type polarizing plate 151 absorbs the horizontal polarization component H of the incident light from the direction of the arrow L121 to block light and prevent the light from passing through the QWP152.

Further, the absorption type polarizing plate 151 transmits the vertically polarized light component V of the incident light from the direction of the arrow L131 to the QWP152.

Further, the QWP152 converts the vertically polarized light component V of the incident light from the direction of the arrow L131 that has passed through the absorption type polarizing plate 151 into the left circularly polarized light component L and transmits it through the transparent screen 51.

Further, the transparent screen 52 reflects the incident light in the direction of the arrow L131, which has been converted into the left circular polarization component L by QWP152, into the right circular polarization component R by reflection, so that the transparent screen 51 is reflected in the direction of the arrow L132. Make it transparent.

Further, QWP152 converts the reflected light in the direction of arrow L132, which has been converted into the right circularly polarized light component R, into the horizontal polarized light component H.

Then, the absorption type polarizing plate 151 absorbs the reflected light in the direction of the arrow L132 converted into the horizontal polarization component H by the QWP152 and blocks the light.

Regarding the arrows representing the horizontally polarized light component H, the vertically polarized light component V, the left circularly polarized light component L, and the right circularly polarized light component R, the symbols H, V, L, and R are also used in FIGS. 9 and 11 and thereafter. Although abbreviated, the shapes of the arrows represent the corresponding polarization components.

On the other hand, as shown in FIG. 9, the incident light in the background from the direction of arrow L14 is transmitted through the transparent screens 52, 51 and QWP152 in a state of having a horizontally polarized light component and a vertically polarized light component, and then an absorption type polarizing plate. Since only the horizontally polarized light component is absorbed by 151, only the vertically polarized light component is viewed by the user 33.

As a result, the incident light in the direction of arrow L131 from the user 33 side, which is ambient light, is transmitted through the absorption type polarizing plate 151, QWP152, and the transparent screen 51, and the light reflected by the transparent screen 52 in the direction of arrow L132 is emitted. , The transparent screen 51, the QWP152, and the absorbent polarizing plate 151 shield the light from being viewed by the user 33.

As a result, the configuration of the display unit 32 shown in FIG. 9 prevents the user 33 from viewing the reflection of his / her background, so that the user 33 is a virtual image composed of the light in the direction of the arrow L13 projected by the projector 53. The image can be viewed in a state of appearing in the background, which is a real image composed of light in the direction of arrow L14, and it is possible to suppress a decrease in reality due to reflection.

In the above, the example in which the absorption type polarizing plate 151 absorbs only the horizontal polarization component has been described, but instead of the configuration in which only the horizontal polarization component is absorbed, a configuration in which only the vertical polarization component is absorbed may be used. good.

In this case, for the background light in the direction of arrow L14, only the horizontal polarization component is viewed by the user 33.

<Third variant of the first embodiment>
By the way, the light of the image projected from the projector 53 is reflected by the transparent screen 51 and is incident on the transparent screen 52 substantially perpendicularly. Here, the transparent screen 52 functions as a half mirror, so that a part of the light of the image projected by the projector 53 is transmitted toward the background, and only the remaining part of the light is transmitted to the transparent screen 51. Reflected in the direction.

Therefore, the image projected by the projector 53 viewed by the user 33 is viewed as a slightly dark image because the amount of light is reduced.

Therefore, the transparent screen 52 may be replaced with a configuration composed of a circularly polarized light reflector so that the light constituting the image projected from the projector 53 can be viewed with a brightness of approximately 100%.

FIG. 11 shows a configuration example of the display unit 32 in which the transparent screen 52'made of a circularly polarized light reflector is provided instead of the transparent screen 52.

Note that, in FIG. 11, configurations having the same functions as the configuration of FIG. 9 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

That is, the display unit 32 of FIG. 11 differs from the display unit 32 of FIG. 9 in that a transparent screen 52'made of a circularly polarized light reflector is provided instead of the transparent screen 52.

The transparent screen (circularly polarized light reflector) 52'transmits only the left circularly polarized light component in the incident light and reflects the right circularly polarized light component.

Therefore, in FIG. 11, the transparent screen (circularly polarized light reflector) 52'reflects the right circularly polarized light component of the incident light in the direction of arrow L14 from the background side on the right side of the figure in the direction of arrow L14'.

Further, the transparent screen (circularly polarized light reflecting plate) 52'transmits the left circularly polarized light component of the incident light in the arrow L14 direction from the background side on the right side in the drawing and causes the transparent screen 51 to enter.

The transparent screen 51 transmits the left circularly polarized light component of the incident light in the direction of arrow L14 as it is, and causes it to enter the QWP152.

Further, QWP152 converts the incident light of the left circularly polarized light component in the direction of arrow L14 into a vertically polarized light component and causes it to be incident on the absorption type polarizing plate 151.

The absorption type polarizing plate 151 transmits the vertically polarized light component in the direction of arrow L14.

This allows the user 33 to view the vertically polarized light component of the background.

Further, since the incident light in the arrow L11 direction constituting the image projected by the projector 53 is composed of the left circularly polarized light component, the transparent screen 51 converts it into the right circularly polarized light component and reflects it in the arrow L12 direction. Then, the light is incident perpendicularly to the transparent screen 52'.

The point that the incident light in the arrow L11 direction constituting the image projected by the projector 53 is composed of the left circularly polarized light component will be described later with reference to FIG.

The transparent screen 52'is composed of a circularly polarized light reflector. Therefore, the transparent screen (circularly polarized light reflecting plate) 52'reflects the incident light composed of the right circularly polarized light component in the arrow L12 direction and emits it as left circularly polarized light.

That is, almost all the incident light composed of the right circularly polarized light component in the arrow L12 direction incident on the transparent screen (circularly polarized light reflecting plate) 52'is incident on the transparent screen 51 as the left circularly polarized light component in the arrow L13 direction.

As a result, the transparent screen 51 transmits the incident light in the direction of arrow L13 as it is and causes it to enter the QWP152.

Further, the QWP152 converts the incident light of the left circularly polarized light component in the direction of arrow L13 into a vertically polarized light component and causes it to be incident on the absorption type polarizing plate 151.

The absorption type polarizing plate 151 transmits the vertically polarized light component in the direction of arrow L13.

With such a configuration, the light of the image projected by the projector 53 is reflected by the transparent screen (circularly polarized light reflecting plate) 52', so that the image projected by the projector 53 is almost 100% on the transparent screen 51 side. Is reflected in.

As a result, the user 33 can also view the image projected by the projector 53 to be viewed with approximately 100% light intensity.

In this case, the horizontal polarization component of the incident light in the direction of the arrow L151 from the user 33 side is absorbed by the absorption type polarizing plate 151 and is not transmitted.

Further, the vertically polarized light component of the incident light in the direction of arrow L161 from the user 33 side is not absorbed by the absorption type polarizing plate 151 and is transmitted through the QWP152.

Further, QWP152 converts the vertically polarized light component of the incident light from the direction of arrow L161 that has passed through the absorption type polarizing plate 151 into a left circularly polarized light component and transmits it through the transparent screen 51.

Further, the transparent screen (circularly polarized light reflecting plate) 52'transmits the incident light in the direction of arrow L161 converted into the left circularly polarized light component as it is.

That is, even in the configuration of FIG. 11, since the ambient light from the user 33 side is not viewed by the user 33, the background of the user 33 is not reflected and viewed.

<Projector configuration example>
Here, with reference to FIG. 12, a configuration example of the projector 53 will be described in order to explain that the light constituting the image projected from the projector 53 is a left circularly polarized light component.

That is, the projector 53 of FIG. 12 is composed of a light source 221, an illumination optical system 222, a PBS (Polarizing Beam Splitter) 223, an LCOS (Liquid crystal on silicon) panel 224, a QWP225, and a projection optical system 226.

The light source 221 functions as a light source for an image projected by the projector 53, and projects illumination light toward the illumination optical system 222 in the direction of arrow L231 in the drawing.

The illumination optical system 222 is composed of a lens or the like, controls the light from the light source 221 to a predetermined linearly polarized light component, and condenses the light on the LCOS panel 224 via the PBS 223.

The PBS 223 branches the predetermined linearly polarized light component from the arrow L231 direction in the arrow L232 direction, and transmits the predetermined linearly polarized light component from the arrow L233 direction reflected by the LCOS panel 224 to the QWP225 and the projection optical system 226.

The LCOS panel 224 constitutes an image with a liquid crystal in pixel units, and projects an image by reflecting illumination light composed of a predetermined linearly polarized light component from the direction of arrow L232 in the direction of arrow L233.

The PBS 223 transmits the light constituting the image composed of the predetermined linearly polarized light component reflected by the LCOS panel 224 to the QWP 225.

QWP225 converts light composed of linearly polarized light components constituting an image into a left circularly polarized light component, and projects it as an image in the direction of arrow L11 via a projection optical system 226 composed of a lens or the like.

With such a configuration, the light constituting the image projected in the direction of arrow L11 is composed of the left circularly polarized light component.

In the projector 53, even if the light in the direction of the arrow L233 is reflected on the surface of the projection optical system 226 and is re-entered into the QWP225, the straight line when the light is incident from the PBS 223 in the direction of the arrow L233 by the QWP225. By converting to a polarized light component 90 degrees different from the polarized light component, it becomes impossible to transmit the PBS 223.

As a result, it is not possible to re-enter the LCOS panel 224, and it is possible to suppress multiple reflections on the LCOS panel 224.

Further, whether the linearly polarized light component converted by the illumination optical system 222 is a horizontally polarized light component or a vertically polarized light component can be selected by design, but here, FIG. 11 shows. In order to correspond to the configuration, the configuration when the light constituting the image projected from the projector 53 is the left circularly polarized light component is shown.

However, any configuration can be adopted by making it correspond to the direction of the orthogonal component transmitted through the absorption type polarizing plate 151.

<< 3. Second Embodiment >>
By controlling the amount of incident light from the background side, the transparency of the background may be adjusted.

FIG. 13 is a configuration example of the display unit 32 in which the transparency of the background can be adjusted by controlling the amount of incident light from the background side.

In the configuration of the display unit 32 of FIG. 13, the configurations having the same functions as those of FIG. 11 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

That is, the configuration of the display unit 32 of FIG. 13 differs from the configuration of the display unit 32 of FIG. 11 in that the dimming unit 241 is provided on the background side from the viewpoint of the user 33.

The dimming unit 241 is composed of a QWP251, a polarization control element 252, and an absorption type polarizing plate 253 that absorbs the vertical component and transmits only the horizontal component from the transparent screen 52'side.

Regarding the incident light in the directions of arrows L171 and L181, since the incident light in the direction of arrow L171 composed of the horizontally polarized light component is absorbed by the absorption type polarizing plate 151, only the incident light in the direction of arrow L181 composed of the vertically polarized light component is transmitted. NS.

Then, QWP152 converts the horizontally polarized light component into the left circularly polarized light component and transmits the transparent screens 51 and 52'.

In the transparent screen (circularly polarized light reflector) 52', the light in the direction of arrow L181 is transmitted as the left circularly polarized light component and is incident on the QWP251.

QWP251 converts the left circularly polarized light component transmitted through the transparent screen (circularly polarized light reflecting plate) 52'in the direction of arrow L181 into a horizontally polarized light component and causes it to be incident on the polarization control element 252.

The polarization control element 252 is composed of a liquid crystal controlled by an applied voltage, and causes polarization rotation equivalent to a maximum of 1/2 wave plate by control with respect to incident light converted into a horizontal polarization component in the direction of arrow L181. Then, it is incident on the absorption type polarizing plate 253.

That is, when the polarization control element 252 causes polarization rotation equivalent to a 1/2 wavelength plate, the horizontally polarized light component is converted into a vertically polarized light component, the vertically polarized light component is converted into a horizontally polarized light component, and the right circularly polarized light component is converted to the left. It is converted into a circularly polarized light component, and the left circularly polarized light component is converted into a right circularly polarized light component.

Therefore, for the incident light in the direction of arrow L181, the absorption type polarizing plate 253 absorbs the vertically polarized light component that is transmitted through the polarization control element 252 and transmits only the horizontal polarized light component.

Further, the absorption type polarizing plate 253 absorbs the vertical polarization component of the incident light from the background indicated by the arrow L14, and causes only the horizontal polarization component to enter the polarization control element 252.

The polarization control element 252 causes the horizontal polarization component of the incident light from the background indicated by the arrow L14 to undergo polarization rotation equivalent to a maximum of 1/2 wave plate by control, and causes the polarization control element 252 to enter the QWP 251.

In the QWP251, the horizontal polarization component of the incident light from the background in the direction of arrow L14 converts the linearly polarized light component whose polarization is rotated by the polarization control element 252 into a circularly polarized light component, and transmits the transparent screens 52, 51 and QWP152. ..

That is, with respect to the horizontal polarization component of the incident light from the background in the direction of arrow L14, the ratio of the vertical polarization component and the horizontal polarization component changes according to the degree of polarization rotation applied by the polarization control element 252.

Therefore, by changing the ratio of the horizontal polarization component transmitted through QWP251 according to the degree of polarization rotation applied by the polarization control element 252, the amount of incident light transmitted from the background in the direction of arrow L14, that is, the amount of light is adjusted. It becomes possible to do.

The transparent screens 52'and 51 allow the circularly polarized light component converted by the QWP251 indicated by the arrow L14 to pass through as it is and incident on the QWP152.

QWP152 converts the circularly polarized light component of the incident light in the direction of arrow L14 into a linearly polarized light component and causes it to be incident on the absorption type polarizing plate 151.

The absorption type polarizing plate 151 absorbs the vertically polarized light component of the incident light in the direction of arrow L14, transmits only the horizontal polarized light component, and allows the user 33 to view the image.

With such a configuration, with respect to the incident light from the background indicated by the arrow L14, the amount of light transmitted through the absorption type polarizing plate 151 changes according to the magnitude of the polarization rotation controlled by the polarization control element 252. Therefore, the user 33 can change the transparency of the background for viewing.

<Structure example of the information processing unit in the second embodiment>
Next, a configuration example of the information processing unit 31 of the display device 11 in the second embodiment will be described with reference to FIG.

The information processing unit 31 of FIG. 14 is composed of an operation input unit 271, an information acquisition unit 272, an analysis unit 273, a control unit 274, and a storage unit 275. Further, the sensor signal supplied to the information acquisition unit 272 is supplied from the sensor unit 281.

The operation input unit 271, the information acquisition unit 272, the analysis unit 273, the control unit 274, the storage unit 275, and the sensor unit 281 in the information processing unit 31 of FIG. 14 basically include the operation input unit 101 and information. It has substantially the same functions as those of the acquisition unit 102, the analysis unit 103, the control unit 104, the storage unit 105, and the sensor unit 111.

Further, the analysis unit 273 can see the amount of incident light from the background, that is, the user 33, based on the sensor signal indicating the brightness of the display environment detected by the sensor unit 281 acquired by the information acquisition unit 272. Analyze the dimming conditions that are the transparency of the background.

The analysis unit 273 generates a control signal for controlling the dimming unit 241 based on the dimming condition which is the analysis result, and outputs the generated control signal to the display unit 32.

The dimming unit 241 adjusts the applied voltage to the polarization control element 252 based on the control signal from the information processing unit 31, adjusts the amount of incident light from the background, and is viewed by the user 33. Adjust the transparency of.

<Display processing by the display device of FIG. 14>
Next, the display process by the display device 11 of FIG. 14 will be described with reference to the flowchart of FIG.

Since the processes of steps S31 to S34 and steps S37 to S40 in the flowchart of FIG. 15 are the same as the processes of steps S11 to S18 in the flowchart of FIG. 6, the description thereof will be omitted.

That is, in step S35, the analysis unit 273 determines the amount of incident light from the background, that is, based on the sensor signal indicating the brightness of the display environment detected by the sensor unit 281 acquired by the information acquisition unit 272. The dimming condition that is the transparency of the background seen by the user 33 is analyzed and specified.

In step S36, the analysis unit 273 generates a control signal for controlling the dimming unit 241 based on the dimming condition which is the analysis result, and outputs the generated control signal to the display unit 32.

In response to this, the dimming unit 241 adjusts the applied voltage to the polarization control element 252 based on the control signal from the information processing unit 31, adjusts the amount of incident light from the background, and dims the light.

By the above series of processing, the image of the content is projected from the projector 53, and the user is allowed to view the image that appears in the background through the transparent screens 51 and 52, and the brightness of the background, that is, the background It is possible to adjust the transparency of the image.

In the above, an example of dimming according to the brightness of the display environment detected by the sensor unit 281 has been described, but the user 33 operates the operation input unit 271 and dims according to the operation signal. You may do so.

<Modification example in the second embodiment>
In the above, the configuration in which the dimming unit 241 is composed of the QWP251, the polarization control element 252, and the absorption type polarizing plate 253 has been described, but other configurations may be used as long as the amount of light from the background side can be adjusted. ..

For example, the dimming unit 241 may be provided with a chromic dimming element instead of the QWP251, the polarization control element 252, and the absorption type polarizing plate 253 to adjust the amount of incident light from the background side.

FIG. 16 is a configuration example of the display unit 32 in which the chromic dimming element 301 is provided in the dimming unit 241.

The chromic dimming element 301 realizes dimming by adjusting the amount of incident light in the direction of arrow L14 from the background side by changing the transmittance according to the applied voltage.

Even in the display unit 32 in which the chromic dimming element 301 is provided in the dimming unit 241, the same control can be performed by the display device 11 of FIG. 14, so that the configuration and display processing of the display device 11 can be described. The description is omitted.

<< 4. Third Embodiment >>
Since it is known that the image from the projector 53 is projected at a position twice the distance between the transparent screens 51 and 52 when viewed from the transparent screen 51, the distance between the transparent screens 51 and 52 can be adjusted. The position of the image projected by the projector 53 may be adjusted.

FIG. 17 shows a configuration example of the display unit 32 capable of adjusting the distance between the transparent screens 51 and 52.

Note that, in the display unit 32 of FIG. 17, the same reference numerals are given to the configurations having the same functions as the configurations of the display unit 32 of FIG. 2, and the description thereof will be omitted as appropriate.

That is, the display unit 32 of FIG. 17 is different from the display unit 32 of FIG. 2 in that the transparent screen 51 and the projector 53 are fixed on the base member 321 in the same manner as in FIG. The point is that the transparent screen 52 is provided on the drive unit 322 provided with a roller or a wheel-shaped member that can move in the direction of the arrow.

That is, the point that the transparent screen 51 and the projector 53 are fixed on the base member 321 is the same as that of the display unit 32 of FIG. 2, but the transparent screen 52 is provided on the drive unit 322. Therefore, the distance between the transparent screens 51 and 52 can be changed by moving the drive unit 322 in the direction of the arrow.

Further, regarding the upper surface portion and the lower surface portion, by providing a light-shielding member 323,324 or by providing a light-shielding member also on the side surface portion (not shown), the intrusion of ambient light can be prevented to create an environment. It is possible to suppress the reflection caused by the reflection.

Since the distance between the transparent screens 51 and 52 changes, the light-shielding members 323 and 324 may have a configuration that can be changed according to the distance between the transparent screens 51 and 52, for example, a bellows-like structure. You may.

<Structure example of the information processing unit in the third embodiment>
Next, a configuration example of the information processing unit 31 of the display device 11 according to the third embodiment will be described with reference to FIG.

The information processing unit 31 of FIG. 18 is composed of an operation input unit 351, an information acquisition unit 352, an analysis unit 353, a control unit 354, and a storage unit 355. Further, the sensor signal supplied to the information acquisition unit 352 is supplied from the sensor unit 361.

The operation input unit 351, the information acquisition unit 352, the analysis unit 353, the control unit 354, the storage unit 355, and the sensor unit 361 in the information processing unit 31 of FIG. 18 basically include the operation input unit 101 and information. It has substantially the same functions as those of the acquisition unit 102, the analysis unit 103, the control unit 104, the storage unit 105, and the sensor unit 111.

Further, the analysis unit 353 uses the projector 53 according to the distance between the transparent screens 51 and 52 based on the operation signal according to the user's operation content detected by the operation input unit 351 acquired by the information acquisition unit 352. Analyze the projection position of the projected image.

The analysis unit 353 generates a control signal for controlling the drive unit 322 based on the projection position which is the analysis result, and outputs the generated control signal to the display unit 32.

The drive unit 322 changes the position between the transparent screens 51 and 52 based on the control signal from the information processing unit 31 to adjust the distance between the transparent screens 51 and 52, thereby adjusting the projected position of the image. Control.

<Display processing by the display device of FIG. 14>
Next, the display process by the display device 11 of FIG. 14 will be described with reference to the flowchart of FIG.

Since the processes of steps S51 to S54 and steps S58 to S61 in the flowchart of FIG. 15 are the same as the processes of steps S11 to S18 in the flowchart of FIG. 6, the description thereof will be omitted.

That is, in step S55, the analysis unit 353 changes the projection position according to the distance between the transparent screens 51 and 52 based on the operation signal supplied from the operation input unit 351 acquired by the information acquisition unit 272. Analyze whether or not is included.

If it is determined in step S55 that the information for changing the projection position is included, the process proceeds to step S56.

In step S56, the analysis unit 353 identifies the movement position of the drive unit 322 based on the information that changes the projection position, which is the analysis result, generates a control signal for controlling the movement to the movement position, and generates the control. The signal is output to the display unit 32.

In step S57, the drive unit 322 moves to adjust the projection position based on the control signal from the information processing unit 31.

If the information for changing the projection position according to the distance between the transparent screens 51 and 52 is not included in step S55, the processes of steps S56 and S57 are skipped.

By adjusting the distance between the transparent screens 51 and 52 by the above series of processes, it is possible to adjust the distance of the image projected by the projector 53 from the user 33 to the viewing position.

<Modified example in the third embodiment>
In the above, an example of adjusting the distance between the transparent screens 51 and 52 by changing the position of the transparent screen 52 by the drive unit 322 has been described, but if the distance between the transparent screens 51 and 52 can be adjusted, , Other configurations may be used.

For example, the transparent screens 51 and 52 may be supported by a support member whose distance between the transparent screens 51 and 52 can be adjusted.

FIG. 20 shows a configuration example of the display unit 32 in which the transparent screens 51 and 52 are supported by a support member whose distance between the transparent screens 51 and 52 can be adjusted.

Note that, in the display unit 32 of FIG. 20, the same reference numerals are given to the configurations having the same functions as the display unit 32 of FIG. 17, and the description thereof will be omitted as appropriate.

That is, in the display unit 32 of FIG. 20, a drive unit 371-1,371-2 made of a motor is provided near the upper end portion and the lower end portion of the transparent screen 51, and a shaft 372-1,372 to which a screw is provided is provided. 2 is a rotatable configuration.

Further, support members 373-1,373-2 are provided near the upper end and the lower end of the transparent screen 52.

The support members 373-1,373-2 are provided with nut-shaped holes into which the screws of the shafts 372-1,372-2 are fitted, and the shafts 372-1,372-2 are the support members. It is listed for the holes of 373-1,373-2.

With such a structure, when the drive units 371-1,371-2 are rotated to rotate the shafts 372-1,372-2, the support member is accompanied by the rotation direction of the shafts 372-1,372-2. 373-1,363-2 moves on the shaft 372-1,372-2 in the left-right direction in the figure.

This makes it possible to adjust the distance between the transparent screens 51 and 52.

It should be noted that the display unit 32 in which the drive units 371-1, 371-2 are provided instead of the drive unit 322 can also perform the same control as the display device 11 of FIG. 18, so that the display device 11 is configured. And the description of the display process will be omitted.

<< 5. Example of execution by software >>
By the way, the series of processes described above can be executed by hardware, but can also be executed by software. When a series of processes are executed by software, the programs that make up the software can execute various functions by installing a computer embedded in dedicated hardware or various programs. It is installed from a recording medium on a possible, eg, general purpose computer.

FIG. 21 shows a configuration example of a general-purpose computer. This personal computer has a built-in CPU (Central Processing Unit) 1001. The input / output interface 1005 is connected to the CPU 1001 via the bus 1004. A ROM (Read Only Memory) 1002 and a RAM (Random Access Memory) 1003 are connected to the bus 1004.

The input / output interface 1005 includes an input unit 1006 including an input device such as a keyboard and a mouse for which a user inputs an operation command, an output unit 1007 for outputting a processing operation screen and an image of a processing result to a display device, a program, and various data. A storage unit 1008 consisting of a hard disk drive or the like for storing, a LAN (Local Area Network) adapter or the like, and a communication unit 1009 for executing communication processing via a network represented by the Internet are connected. In addition, magnetic disks (including flexible disks), optical disks (including CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc)), optical magnetic disks (including MD (Mini Disc)), or semiconductors. A drive 1010 that reads and writes data to and from a removable storage medium 1011 such as a memory is connected.

The CPU 1001 is read from a program stored in the ROM 1002 or a removable storage medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, installed in the storage unit 1008, and loaded from the storage unit 1008 into the RAM 1003. Various processes are executed according to the program. The RAM 1003 also appropriately stores data and the like necessary for the CPU 1001 to execute various processes.

In the computer configured as described above, the CPU 1001 loads the program stored in the storage unit 1008 into the RAM 1003 via the input / output interface 1005 and the bus 1004 and executes the above-described series. Is processed.

The program executed by the computer (CPU1001) can be recorded and provided on the removable storage medium 1011 as a package medium or the like, for example. The program can also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

In the computer, the program can be installed in the storage unit 1008 via the input / output interface 1005 by mounting the removable storage medium 1011 in the drive 1010. Further, the program can be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the storage unit 1008. In addition, the program can be pre-installed in the ROM 1002 or the storage unit 1008.

The program executed by the computer may be a program that is processed in chronological order according to the order described in this specification, or may be a program that is processed in parallel or at a necessary timing such as when a call is made. It may be a program in which processing is performed.

Note that the CPU 1001 in FIG. 21 realizes the functions of the information processing unit 31 in FIGS. 5, 14, and 18.

Further, in the present specification, the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Therefore, a plurality of devices housed in separate housings and connected via a network, and a device in which a plurality of modules are housed in one housing are both systems. ..

The embodiment of the present disclosure is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present disclosure.

For example, the present disclosure can have a cloud computing configuration in which one function is shared by a plurality of devices via a network and jointly processed.

In addition, each step described in the above flowchart can be executed by one device or shared by a plurality of devices.

Further, when one step includes a plurality of processes, the plurality of processes included in the one step can be executed by one device or shared by a plurality of devices.

Note that this disclosure can also have the following structure.

<1> The first transparent screen and
A second transparent screen provided so as to face the first transparent screen substantially in parallel,
A projector provided between the first transparent screen and the second transparent screen and projecting an image on the back side of the first transparent screen facing the second transparent screen. Prepare,
The first transparent screen reflects the image projected by the projector toward the front side of the second transparent screen.
The second transparent screen positively reflects the image reflected by the first transparent screen on the front side to the first transparent screen, and transmits the incident light of the background incident from the back side. ,
The first transparent screen is a display that transmits the image projected by the projector and reflected by the second transparent screen and the incident light of the background transmitted through the second transparent screen from the back side. Device.
<2> The display device according to <1>, wherein the first transparent screen is an ultra-short focus screen capable of projecting the image even if the distance from the projector is a predetermined distance or a short distance.
<3> The first transparent screen includes a microprism sheet, and the image projected from the projector by the microprism sheet is reflected on the second transparent screen according to <1> or <2>. Display device.
<4> The display according to <1> or <2>, wherein the first transparent screen includes a hologram sheet, and the image projected from the projector by the hologram sheet is reflected on the second transparent screen. Device.
<5> In the space between the first transparent screen and the second transparent screen, the upper surface portion, the lower surface portion, and the side surface portion are further provided with a light-shielding wall that blocks ambient light <1>. The display device described.
<6> The display device according to <1>, further comprising an absorption-type polarizing plate and a 1/4 wave plate in order from a position farther from the first transparent screen on the front side of the first transparent screen. ..
<7> The display device according to any one of <1> to <6>, wherein the second transparent screen is composed of a circularly polarized light reflector.
<8> The display device according to <7>, further comprising a dimming unit for adjusting the amount of incident light from the back side on the back side of the second transparent screen made of the circularly polarized light reflector.
<9> The dimming unit is composed of a 1/4 wave plate, a polarization control element, and an absorption type polarizing plate in order from the circularly polarized light reflecting plate, and by controlling the polarization control element, the back side thereof. The display device according to <8>, which adjusts the amount of incident light from.
<10> The display device according to <8>, wherein the dimming unit is composed of a chromic dimming element, and the amount of incident light from the back surface side is adjusted by controlling the chromic dimming element.
<11> The display device according to any one of <1> to <10>, further comprising an adjusting unit for adjusting the distance between the first transparent screen and the second transparent screen.
<12> The adjusting unit moves the second transparent screen with the first transparent screen while maintaining a state in which the surfaces face each other in parallel with the first transparent screen. The display device according to <11>, which adjusts the distance from the second transparent screen.
<13> The adjusting portion rotates a shaft that aligns a first supporting portion that supports the first transparent screen and a second supporting portion that supports the second transparent screen. The display device according to <11>, which adjusts the distance between the first transparent screen and the second transparent screen.
<14> The adjusting unit adjusts the distance between the first transparent screen and the second transparent screen so that the user can use the first transparent screen from the viewing position on the front side of the first transparent screen. The display device according to <11>, which adjusts a position at which the image appears to be projected when viewing the image transmitted through the screen, projected by the projector, and reflected by the second transparent screen.
<15> When the user views the image projected by the projector and reflected by the second transparent screen, which is transmitted through the first transparent screen from the viewing position on the front side of the first transparent screen. The image appears to be projected onto a virtual screen located on the back side of the second transparent screen by the distance between the first transparent screen and the second transparent screen. <14 The display device described in>.
<16> The first transparent screen and
A second transparent screen provided so as to face the first transparent screen substantially in parallel,
A projector provided between the first transparent screen and the second transparent screen and projecting an image on the back side of the first transparent screen facing the second transparent screen. It is a display method of the provided display device.
The first transparent screen reflects the image projected by the projector toward the front side of the second transparent screen.
The second transparent screen positively reflects the image reflected by the first transparent screen on the front side to the first transparent screen, and transmits the incident light of the background incident from the back side. ,
The first transparent screen is a display that transmits the image projected by the projector and reflected by the second transparent screen and the incident light of the background transmitted through the second transparent screen from the back side. Method.

11 Display device, 31 Information processing unit, 32 Display unit, 33 User, 51, 52, 52'Transparent screen, 53 Projector, 71 Support base material, 72 Microprism sheet, 73 Reflective film, 74 Protective layer, 75 AR coat, 81 hologram sheet, 101 operation input unit, 102 information acquisition unit, 103 analysis unit, 104 control unit, 105 storage unit, 111 sensor unit, 131-1 to 131-4 light-shielding wall, 151 absorption type polarizing plate, 152 QWP, 221 Light source, 222 illumination optical system, 223 PBS, 224 LCOS panel, 225 QWP, 226 projection optical system, 241 dimming unit, 251 QWP, 252 polarization control element, 253 absorption type polarizing plate, 271 operation input unit, 272 information acquisition unit , 273 analysis unit, 274 control unit, 275 storage unit, 281 sensor unit, 301 chromic dimming element, 321 base member, 322 drive unit, 323,324 shading member, 351 operation input unit, 352 information acquisition unit, 353 analysis unit , 354 control unit, 355 storage unit, 361 sensor unit, 371-1,371-2 drive unit, 372-1,372-2 shaft, 373-1,373-2 support member

Claims (16)

The first transparent screen and
A second transparent screen provided so as to face the first transparent screen substantially in parallel,
A projector provided between the first transparent screen and the second transparent screen and projecting an image on the back side of the first transparent screen facing the second transparent screen. Prepare,
The first transparent screen reflects the image projected by the projector toward the front side of the second transparent screen.
The second transparent screen positively reflects the image reflected by the first transparent screen on the front side to the first transparent screen, and transmits the incident light of the background incident from the back side. ,
The first transparent screen is a display that transmits the image projected by the projector and reflected by the second transparent screen and the incident light of the background transmitted through the second transparent screen from the back side. Device. The display device according to claim 1, wherein the first transparent screen is an ultra-short focus screen capable of projecting the image even if the distance from the projector is a predetermined distance or a short distance. The display device according to claim 1, wherein the first transparent screen includes a microprism sheet, and the image projected from the projector by the microprism sheet is reflected on the second transparent screen. The display device according to claim 1, wherein the first transparent screen includes a hologram sheet, and the image projected from the projector by the hologram sheet is reflected on the second transparent screen. The display according to claim 1, further comprising a light-shielding wall for blocking ambient light on the upper surface portion, the lower surface portion, and the side surface portion in the space between the first transparent screen and the second transparent screen. Device. The display device according to claim 1, further comprising an absorption-type polarizing plate and a 1/4 wave plate in order from a position farther from the first transparent screen on the front side of the first transparent screen. The display device according to claim 1, wherein the second transparent screen is composed of a circularly polarized light reflector. The seventh aspect of claim 7, wherein a dimming unit for adjusting the amount of incident light from the back side is further provided on the back side with respect to the side provided with the second transparent screen made of the circularly polarized light reflector. Display device. The dimming unit is composed of a 1/4 wave plate, a polarization control element, and an absorption type polarizing plate in order from the circularly polarized light reflecting plate, and by controlling the polarization control element, the incident light is incident from the back surface side. The display device according to claim 8, wherein the amount of light is adjusted. The display device according to claim 8, wherein the dimming unit is composed of a chromic dimming element, and controls the chromic dimming element to adjust the amount of incident light from the back surface side. The display device according to claim 1, further comprising an adjusting unit for adjusting the distance between the first transparent screen and the second transparent screen. The adjusting unit moves the second transparent screen while maintaining a state in which the surfaces face each other in parallel with respect to the first transparent screen, whereby the first transparent screen and the second transparent screen are moved. The display device according to claim 11, wherein the distance from the transparent screen is adjusted. The adjusting portion rotates a shaft that aligns a first supporting portion that supports the first transparent screen and a second supporting portion that supports the second transparent screen, thereby causing the first. 11. The display device according to claim 11, wherein the distance between the transparent screen and the second transparent screen is adjusted. By adjusting the distance between the first transparent screen and the second transparent screen, the adjusting unit allows the user to transmit the first transparent screen from the viewing position on the front side of the first transparent screen. The display device according to claim 11, wherein the position where the image appears to be projected when the image projected by the projector and reflected by the second transparent screen is viewed. When the user views the image projected by the projector and reflected by the second transparent screen, which is transmitted through the first transparent screen from the viewing position on the front side of the first transparent screen, the image is displayed. 14 is described in claim 14, which appears to be projected onto a virtual screen located on the back side of the second transparent screen by the distance between the first transparent screen and the second transparent screen. Display device. The first transparent screen and
A second transparent screen provided so as to face the first transparent screen substantially in parallel,
A projector provided between the first transparent screen and the second transparent screen and projecting an image on the back side of the first transparent screen facing the second transparent screen. It is a display method of the provided display device.
The first transparent screen reflects the image projected by the projector toward the front side of the second transparent screen.
The second transparent screen positively reflects the image reflected by the first transparent screen on the front side to the first transparent screen, and transmits the incident light of the background incident from the back side. ,
The first transparent screen is a display that transmits the image projected by the projector and reflected by the second transparent screen and the incident light of the background transmitted through the second transparent screen from the back side. Method.

Images