JP2006135378A - Three-dimensional image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of a conventional three-dimensional image display apparatus employing a plurality of half mirrors wherein it requires a plurality of two-dimensional image display apparatuses resulting in making the system configuration and production of video contents complicated; the virtual image for configuring a three-dimensional image exists only on the vertical plane of the sight line of a viewer and does not utilize the image on a horizontal plane; and further the viewer can view the three-dimensional image only from a prescribed direction. <P>SOLUTION: A two-dimensional video plane is divided into a plurality of image regions, the respective images are displayed, a plurality of the half mirrors are arranged on the plane at a prescribed tilt angle, and a three-dimensional image is displayed by means of overlappingly viewed virtual images in a direction of the visual line of the viewer. There are provided some image regions on which no half mirror is arranged and the three-dimensional image also in combination with the image on the horizontal plane is displayed. Moreover, a full mirror is arranged on the plane so that the three-dimensional image is displayed even in the sight line in direct opposition to the sight line of the viewer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a three-dimensional image display device, and more particularly to a device that generates a plurality of virtual images by a two-dimensional image display device and a plurality of half mirrors and displays a three-dimensional image that can be viewed without wearing special glasses or the like. It is about.

The literature referred to in this specification and the definition of the words used are as follows.
Utility model registration number 3004519 Display device (Fig. 1, Fig. 2, Fig. 3) JP, 2000-115812, A Three-dimensional display method and device (Figs. 3 and 4) Hereinafter, in this specification, "video content" is a video displayed on a two-dimensional video display device, which is particularly workable Indicates. Usually, it is recorded on a video tape, a DVD, etc., and reproduced by a video reproducing device such as a video tape player, a DVD player. “Full mirror” refers to a mirror with a reflectance of almost 100%. The “observer's constant line-of-sight direction” means the observer's line-of-sight direction when the 3D image displayed by the apparatus according to the present invention enters the field of view of the observer, and is the only fixed line-of-sight direction. is not.

There is a conventional 3D video display apparatus in which one or a plurality of 2D video display apparatuses are arranged on a plurality of half mirrors.

For example, in the display device disclosed in Patent Document 1, one or a plurality of two-dimensional video display devices 1302 are installed in a plurality of half mirrors 1301 as shown in FIG. In addition to this, a video playback device 1304 corresponding to each two-dimensional video display device and a device 1305 for controlling the synchronization of video signals are required. In this device, a plurality of virtual images 1303 generated by the half mirror 1301 from the images of the respective two-dimensional image display devices 1302 are simultaneously displayed at different depth positions with respect to the line of sight of the observer 1320, so An original stereoscopic image is generated.

In addition, the device disclosed in Patent Document 2 is not intended to generate a specific 3D image, but in the embodiment, as shown in FIG. A video display device 1402 is provided. In addition to this, a device 1406 for controlling the synchronization of the video signal with the video playback device 1405 is required. In this device, a virtual image 1404 generated by the half mirror 1401 from the video 1403 displayed on the two-dimensional video display device 1402 is simultaneously displayed on a plurality of display surfaces having different depth positions as viewed from the observer 1420, and each virtual image is displayed. A 3D image is generated by controlling the brightness to a desired level.

Each of the conventional 3D video display devices described above requires a plurality of 2D video display devices, video playback devices corresponding to them, and a device for controlling the synchronization of video signals, and the overall configuration of the device is complicated. become. In addition, multiple video contents to be displayed on each 2D video display device are required and must be synchronized with each other, which requires a high level of skill for video content creators. Will be narrowed.

In any of the above conventional 3D image display devices, the virtual image constituting the 3D image is generated only on a plane perpendicular to the observer's fixed line-of-sight direction, and is parallel to the fixed line-of-sight direction. The original 2D image plane is not used as a major aspect. Furthermore, in any of the 3D image display devices, a 3D image can be viewed only from a certain viewing direction of the observer.

The present invention is intended to simplify the complicated configuration of a conventional three-dimensional video display device using a plurality of half mirrors. As a result, the device itself can be manufactured at low cost, and video content can be manufactured. It is intended to simplify the production of video content and expand the scope of video content creators. In addition, a two-dimensional image plane parallel to the observer's fixed line-of-sight direction, which was not used in conventional three-dimensional image display devices, is used and combined with a virtual image on a plane perpendicular to the conventional line-of-sight direction. Therefore, we are trying to generate 3D images that will attract more viewer interest. Furthermore, in the conventional 3D image display device, the 3D image can only be seen from the observer's fixed line of sight, but the object is to allow the 3D image to be seen from the opposite direction of the line of sight. .

In order to achieve the above object, the first solution of the present invention is to divide a two-dimensional image plane displayed by one two-dimensional image display device into a plurality of image areas, and to each of the plurality of image areas. An individual image is displayed, and a plurality of half mirrors corresponding to the size and position of the plurality of image areas are inclined at a fixed angle with respect to the two-dimensional image surface, and the plurality of half mirror surfaces are parallel to each other. In this way, a plurality of virtual images generated by the corresponding half mirrors appear to overlap each other in a certain line of sight of the observer from the video region where the plurality of half mirrors are installed. The original video is displayed.

The second solution is to provide an image area in which a half mirror is not installed in the plurality of image areas, and to provide an image area that can be seen only as a plane parallel to a certain viewing direction of the observer.

A third solution is to install a full mirror corresponding to the size and position of the plurality of half mirrors, and to display the 3D image in a direction opposite to the observer's constant viewing direction. It is that.

The effects of the first problem solving means are as follows. Since the present invention has a single two-dimensional video device, the configuration of the device is simplified, the device can be manufactured at a lower cost, and only one video content is produced. Since video content is produced in units of video areas that divide the video surface and combined into a single video during editing, it is easy to control the synchronization between each video area and to control the synchronization as before This device is also unnecessary. As a result, the production of the video content for the 3D video display device according to the present invention does not require a high level of technology, and the frame of the video content creator is expanded.

The effect of the second problem solving means is that not only a virtual image on a plane perpendicular to the conventional gaze direction is provided by providing an image area that can be seen only as a plane parallel to the observer's constant gaze direction. It is possible to generate more complicated and interesting 3D images by combining images of parallel planes.

The effect of the third problem solving means is that, conventionally, a 3D image can be displayed only in a certain line of sight of the observer. In the present invention, however, the direction is opposite to the certain line of sight of the observer. 3D images can also be displayed, and more viewers can view 3D images at the same time.

The best mode for carrying out the present invention will be described. FIG. 1 is a plan view of a 3D image display apparatus according to the present invention, and a portion surrounded by a thick line indicates a 2D image surface 1. The two-dimensional image plane 1 is divided into rectangular image areas 4a, 6a, 4b, 6b and 4c by parallel lines. The video areas 4a, 4b, and 4c are video areas where the half mirror is installed, and the video areas 6a and 6b are video areas where the half mirror is not installed. Although the video areas 6a and 6b where the half mirror is not installed are hatched, this shows the pattern of the video and is not a representation of the cross section. In all of the following drawings in this specification, hatching indicates a pattern of an image. The video to be displayed on the 2D video screen 1 is created for each video area and is combined into a single video at the editing stage to produce a single video content. The produced video content is displayed on the 2D video screen 1. In this embodiment, the two-dimensional image plane 1 is divided into five image areas, but the number of divisions is not limited to this. In addition, the widths Wa, Da, Wb, Db, and Wc of each video area may not be the same.

FIG. 2 is a side view. Although the 2D image plane 1 is not clearly shown in FIG. 2, the combination of 4a, 6a, 4b, 6b, and 4c is the 2D image plane 1. FIG. 2 shows the positional relationship between the video areas 4a, 4b, and 4c and the half mirrors 3a, 3b, and 3c corresponding to the sizes and positions thereof. The two-dimensional image plane 1 is arranged in parallel to the fixed visual line direction 201 of the observer 20. In this case, the two-dimensional image plane 1 is preferably arranged horizontally. The half mirrors 3a, 3b, and 3c are inclined at a fixed angle on the two-dimensional image plane 1 according to the positions of the video areas 4a, 4b, and 4c, respectively, and are arranged so that all the half mirror surfaces are parallel to each other. . The half mirrors 3a, 3b, and 3c are preferably arranged to be inclined by about 45 ° toward the viewer 20, and in this case, the widths Ha, Hb, and Hc of the half mirrors 3a, 3b, and 3c are respectively set to the video area 4a. , 4b, 4c is about 1.4 times. The half mirrors 3a, 3b, 3c and the two-dimensional image surface 1 may not be in contact with each other. FIG. 3 is a perspective view showing an overall image of the 2D video display device 2, the 2D video screen 1, and the half mirrors 3a, 3b, 3c.

As shown in FIG. 2, the virtual image 5a of the video in the video area 4a generated by the half mirror 3a can be seen in the constant line-of-sight direction 201 of the observer 20. At the same time, in the line-of-sight direction 201, a virtual image 5b of the video in the video area 4b generated by the half mirror 3b and a virtual image 5c of the video in the video area 4c generated by the half mirror 3c can be seen. As a result, the observer 20 sees a plurality of virtual images 5a, 5b, and 5c having different depth positions as a three-dimensional image.

FIG. 4 is a three-dimensional image that can be seen in a constant line-of-sight direction 201 of the observer 20. The virtual image 55a of the video 44a in the video area 4a, the virtual image 55b of the video 44b in the video area 4b, and the virtual image 55c of the video 44c in the video area 4c appear to be superimposed on the depth position from the observer 20 as a three-dimensional video appear.

As shown in FIG. 2, no corresponding half mirror is provided in the video areas 6a and 6b. Therefore, as shown in FIG. 4, the video regions 6a and 6b where the half mirror is not installed are video regions that can be seen only as a plane parallel to the observer's 20 constant line-of-sight direction 201, and a virtual image cannot be seen. As a result, not only the virtual images 55a, 55b, and 55c on the plane perpendicular to the line-of-sight direction 201 but also a three-dimensional video that combines video areas 6a and 6b that can be seen only as parallel planes can be generated. In addition, when the widths Da and Db of the video areas 6a and 6b shown in FIGS. 1 and 2 are not set to 0 and the video areas 6a and 6b are extinguished, the three-dimensional video by the virtual images 55a, 55b, and 55c Can be generated.

FIG. 5 is a side view showing the positional relationship between the half mirrors 3a, 3b, and 3c and the full mirrors 7a, 7b, and 7c and the two-dimensional image display device 2 that are installed corresponding to the half mirrors 3a, 3b, and 3c. FIG. 10 is a diagram showing a mechanism for generating a virtual image in a direction 211. As shown in FIG. 5, full mirrors 7a, 7b, and 7c are installed in the half mirrors 3a, 3b, and 3c, respectively. The full mirrors 7a, 7b, 7c are the same shape as the corresponding video areas 4a, 4b, 4c or a form that can encompass them, and are substantially parallel to the video areas 4a, 4b, 4c and corresponding half mirrors 3a, Arrange them so that they do not interfere with 3b and 3c. That is, the half mirrors 3a, 3b, and 3c are sandwiched between the full mirrors 7a, 7b, and 7c and the video areas 4a, 4b, and 4c. The reflection surfaces of the full mirrors 7a, 7b, and 7c are set downward (side where the two-dimensional image device 2 is provided). The half mirrors 3a, 3b, and 3c may not be in contact with the corresponding full mirrors 7a, 7b, and 7c. FIG. 6 is a perspective view showing the whole image of the 2D image display device 2, the 2D image surface 1, the half mirrors 3a, 3b, 3c, and the full mirrors 7a, 7b, 7c.

As shown in FIG. 5, in an observer 21 having a line-of-sight direction 211 opposite to the constant line-of-sight direction 201 of the observer 20, the image in the image area 4a is reflected by the full mirror 7a to generate 8a. The observer 21 can see the virtual image 9a of 8a generated by the half mirror 3a. At the same time, the image in the image area 4b is reflected by the full mirror 7b to generate 8b, and the observer 21 can see the virtual image 9b of 8b generated by the half mirror 3b. At the same time, the video in the video area 4c is reflected by the full mirror 7c to generate 8c, and the observer 21 can see the virtual image 9c of 8c generated by the half mirror 3b. From the observer 21, a plurality of virtual images 9a, 9b, and 9c having different depth positions appear to overlap each other and appear as a three-dimensional image.

FIG. 7 is a three-dimensional image that can be seen in a certain gaze direction 211 of the observer 21. The virtual image 99a of the video 44a displayed in the video area 4a, the virtual image 99b of the video 44b in the video area 4b, and the virtual image 99c of the video 44c in the video area 4c appear to be superposed on the depth position from the observer 21, and tertiary It looks as the original video. By installing full mirrors 7a, 7b, and 7c, virtual images 99a, 99b, and 99c on the plane perpendicular to the constant gaze direction 211 of observer 21 and video regions 6a and 6b that can be seen only as parallel planes are displayed. The combined 3D image can be displayed. Therefore, it is possible to display a three-dimensional image with respect to the constant line-of-sight directions 201 and 211 of both the observer 20 and the observer 21.

FIG. 8 is a side view showing the positional relationship between the half mirrors 3a, 3b, 3c, the full mirrors 7a, 7b, 7c, and the two-dimensional image display device 2 as in FIG. 5, but in a constant line-of-sight direction 201 of the observer 20. FIG. 6 is a diagram showing that there is no influence by full mirrors 7a, 7b, and 7c in a visible three-dimensional image. In a constant line-of-sight direction 201 of the observer 20, the half mirrors 3a, 3b, 3c do not generate virtual images of 8a, 8b, 8c by the full mirrors 7a, 7b, 7c. Even if the full mirrors 7a, 7b, and 7c are installed, the observer 20 can still see the virtual images 5a, 5b, and 5c of the images in the image areas 4a, 4b, and 4c. appear. That is, in the three-dimensional image seen from the observer 20, there is no influence by installing the full mirrors 7a, 7b, and 7c.

The production of video content is as follows. The images displayed in the image areas 4a, 4b, and 4c where the half mirrors in FIG. 1 are installed are displayed as virtual images on a plane perpendicular to the observer's fixed line-of-sight direction. However, it is preferable to display an image that is not unnatural (for example, a walking person). In this case, it is necessary to produce an image in consideration of the vertical direction when it becomes a virtual image. Since the video areas 6a and 6b where the half mirror is not installed are horizontal images that are parallel to the observer's fixed line-of-sight direction, images that are not natural even if they are horizontal (such as sidewalk patterns) It is preferable to display.

Example 1 is shown in FIG. In this embodiment, the screen 92a and the liquid crystal projector 92b constitute a 2D video display device, and the 2D video screen 91 is displayed on the screen 92a. The two-dimensional image plane 91 is divided into seven image areas. Of these, four were placed in the video area where the half mirror was installed, and the remaining three were placed in the video area where the half mirror was not installed, and the two were alternately arranged, and the full mirror 97 was installed on one sheet. The size of the two-dimensional image plane 91 is preferably about 55 cm × 75 cm. In this case, the distance between the screen 92a and the full mirror 97 is about 8 cm.

Since the screen 92a needs to maintain flatness, a transparent plate glass having a thickness of about 5 mm or a plate made of transparent plastic (acrylic, hard vinyl chloride, polycarbonate, etc.) having a thickness of about 10 mm is used. A thin film that does not have a smooth surface such as tracing paper and transmits light is attached to the upper surface of the plate glass or plastic plate. Instead of applying tracing paper or the like, glass (polished glass or the like) or plastic whose surface is polished roughly can also be used. In this case, the polishing surface is the upper surface.

The half mirror 93 is preferably made as thin as possible within the range allowed by the strength in order to prevent the occurrence of ghost. The reflectivity of a normal transparent plate glass or transparent plastic plate is sufficient, and it is not necessary to deposit a metal such as aluminum on the surface in order to increase the reflectivity. It is possible to suppress the generation of ghosts when the transmittance is slightly higher than that of a transparent hard vinyl chloride plate, rather than the high transparency of a transparent acrylic plate. Considering the above conditions, it is preferable to use a transparent hard vinyl chloride plate having a thickness of about 1 mm for the half mirror.

The full mirror 97 may not be a segment type such as 7a, 7b, and 7c shown in FIGS. 5 and 6, but may be a single one as long as it includes a video area in which all the half mirrors are installed. The full mirror 97 preferably has a reflectivity of approximately 100%. However, even if the reflectivity is about 50% to 70%, the observer 921 can sufficiently view a three-dimensional image. Since the material must have both strength and lightness in order to maintain flatness, it is preferable to use a surface mirror in which a metal such as aluminum is vapor-deposited on an acrylic plate having a thickness of about 3 mm.

Since the screen 92a and the liquid crystal projector 92b need to be spaced apart from each other by a certain distance, a column 901 and a base 902 are provided to support them. In order for the image by the liquid crystal projector 92b to be always projected at a certain position on the screen 92a, sufficient strength and rigidity are required for the material and connection of the support 901, the base 902, and the screen 92a. The column 901 is preferably made of a metal pipe such as iron or aluminum having a diameter of about 20 mm or a material having the same strength. If the base 902 is made of a plywood having a thickness of about 12 mm and a wood square having a size of about 50 mm, sufficient strength can be obtained. The base 902 can be made of a metal such as iron or aluminum or a plastic plate.

The height of the screen 92a from the floor is preferably approximately the same as the eyes of the viewers 920 and 921. Assuming that an adult woman or a junior high school student becomes an observer, the optimal height of the screen 92a from the floor is about 140 cm. At this height, even if the observer is an adult male, if he / she is slightly in the middle, he / she can appreciate 3D images. If a high-brightness liquid crystal projector 92b is used, a 3D image can be viewed even in a dark place.

The apparatus 903 for reproducing video content uses a video tape player or a DVD player, and is connected to the liquid crystal projector 92b with a cable.

Example 2 is shown in FIG. The present embodiment basically has the same configuration as that of the first embodiment, but is an embodiment for realizing a larger two-dimensional image plane 101. The difference from the first embodiment is that the two-dimensional video display device is composed of a screen 102a, a liquid crystal projector 102b, and a full mirror 102c. The full mirror 102c is disposed at an inclination of about 45 degrees with respect to the base 1002, and reflects the projection light in the horizontal direction of the liquid crystal projector in the vertical direction to display the two-dimensional image plane 101 on the screen 102a. Through the full mirror 102c, the distance until the projection light of the liquid crystal projector 102b reaches the screen 102a can be increased, and the size of the two-dimensional image surface 101 is approximately the size ratio of the two-dimensional image surface 91 of the first embodiment. It can be 1.5 times approximately 85cm x 120cm. In this case, the distance between the screen 102a and the full mirror 107 is about 12 cm. The full mirror 102c is preferably a surface mirror, and is disposed with the reflection surface facing upward. It is also possible to create a larger two-dimensional image plane 101 by moving the position of the liquid crystal projector 102b away from the full mirror 102c.

In the case of Example 2, the material of the screen 102a is the same as that of Example 1, but the thickness is about 8 mm to 10 mm for plate glass and about 15 mm for plastic plate. The material of the half mirror 103 is the same as in Example 1, but the thickness is preferably about 1.5 m. The material of the full mirror 107 is the same as in Example 1, but the thickness is preferably about 5 mm. The materials of the support column 1001 and the base 1002 are the same as those in the first embodiment, but the dimensions are such that the screen 102a, the liquid crystal projector 102b, and the full mirror 102c can be sufficiently fixed. The video playback device 1003 is the same as that of the first embodiment. The height of the screen 102a from the floor is the same as that of the first embodiment, and is preferably about the same as the eye height of the observers 1020 and 1021.

Example 3 is shown in FIG. In this embodiment, a thin display such as a liquid crystal display or a plasma display is used for the two-dimensional image display device 112. The screen of the 2D video display device 112 becomes the 2D video screen 111. The numbers and positions of the video areas where the half mirror is installed and the video areas where the half mirror is not installed are the same as in the first embodiment. The materials and thicknesses of the half mirror 113 and the full mirror 117 are the same as in the first embodiment. An apparatus 1103 for reproducing video content is the same as that in the first embodiment.

In this embodiment, the support and base used in Embodiment 1 are not required, but it is preferable to place the height of the two-dimensional image plane 111 in accordance with the positions of the eyes of the observers 1120 and 1121. Since the size of the two-dimensional image plane 111 depends on the size of the two-dimensional image display device 112, a small one having a size of about 23 cm × 30 cm to a size of about 60 cm × 80 cm can be created.

Example 4 is shown in FIG. In this embodiment, a large-sized video display device having a screen composed of LEDs called “aurora vision” is used as the two-dimensional video display device 122. The screen of the 2D video display device 122 becomes the 2D video screen 121. This is a large embodiment in which the distance between the two-dimensional image plane 121 and the full mirror 127 is about 2 m to 2.5 m. To protect the aurora vision LED from being damaged even if a person gets on the 2D image surface 121, a transparent tempered glass plate having a thickness of about 10 mm to 15 mm is placed on the 2D image surface 121 for protection. The material of the half mirror 123 is preferably a transparent tempered glass plate having a thickness of about 10 mm to 15 mm. The full mirror 127 is preferably made by depositing metal on a transparent tempered glass plate having a thickness of about 10 mm to 15 mm. The half mirror 123, the column 1201 for supporting the full mirror 127, and the beam 1202 are required to have sufficient strength, and are preferably made of steel. An apparatus for reproducing video content (not shown in FIG. 12) is the same as in the first embodiment. The observers 1220 and 1221 can see a life-size 3D image.

Each example will be compared. The first embodiment is relatively inexpensive to manufacture and can be viewed in a dark place by using a high-brightness liquid crystal projector. The 3D images that can be displayed are also large enough. The manufacturing cost of the second embodiment is not much different from that of the first embodiment, but a larger 3D image can be displayed. In the third embodiment, three-dimensional video display devices having various sizes can be manufactured depending on the size of the display. In particular, if it is made small, it can be manufactured inexpensively and is easy to carry. However, the brightness of the screen of a liquid crystal display or a plasma display is usually darker than that of an image by a liquid crystal projector, so that it can be viewed only in a dark place. The fourth embodiment can display a powerful large three-dimensional image. However, it is almost impossible to move, and it becomes an outdoor architectural facility.

The 3D image display device according to the present invention allows an observer to view 3D images without wearing special glasses, etc., so that Examples 1, 2, and 3 can be used as advertising media at stores, etc. It is possible to attract more interest from an unspecified number of observers. Since the structure is simpler than that of a conventional 3D image display device, it can be manufactured at low cost. In the fourth embodiment, a space that attracts the viewer's interest can be realized by installing it in a public place and using it as an advertising medium. In any of the embodiments, since the production of the video content is simple, the video content can be produced at a low cost.

Plan view of 3D image display device of the present invention Side view of 3D image display device of the present invention The perspective view of the three-dimensional image display apparatus of this invention 3D image perspective view of the observer 20 of the 3D image display device of the present invention seen in a certain line of sight direction Side view of 3D image display device of the present invention The perspective view of the three-dimensional image display apparatus of this invention 3D image perspective view of the viewer 21 of the 3D image display device of the present invention seen in a certain viewpoint direction Side view of 3D image display device of the present invention 1 is a perspective view showing a 3D image display apparatus according to Embodiment 1 of the present invention. FIG. The perspective view which shows the three-dimensional video display apparatus of Example 2 of this invention. 3 is a perspective view showing a 3D image display apparatus according to Embodiment 3 of the present invention. FIG. The perspective view which shows the three-dimensional video display apparatus of Example 4 of this invention. The figure which shows schematic structure of the other example of the conventional three-dimensional video display apparatus. The figure which shows schematic structure of the other example of the conventional three-dimensional video display apparatus.

Explanation of symbols

1 ... 2D image plane
2… 2D image display device
3a, 3b, 3c… Half mirror
4a, 4b, 4c… Video area where the half mirror is installed
5a, 5b, 5c… virtual image
6a, 6b ... Video area where no half mirror is installed (Video area that can be seen only as a plane parallel to a certain line of sight)
7a, 7b, 7c… Full mirror
8a, 8b, 8c ... Images in the image areas 4a, 4b, 4c projected by the full mirror
9a, 9b, 9c ... virtual image
20,21 ... Observer
201 ... Constant gaze direction of the observer 20
211 ... Constant gaze direction of the observer 21 (a gaze direction opposite to the constant gaze direction of the observer 20)
44a, 44b, 44c… Videos in the video areas 4a, 4b, 4c
55a, 55b, 55c… 44a, 44b, 44c virtual images (3D images)
99a, 99b, 99c… 44a, 44b, 44c virtual images (3D images)

Claims (3)

Dividing one 2D image plane displayed by one 2D image display device into a plurality of image areas,
Displaying individual videos in the plurality of video areas,
The plurality of video regions such that the plurality of half mirrors corresponding to the sizes and positions of the plurality of video regions are inclined at a fixed angle with respect to the two-dimensional video surface, and the plurality of half mirror surfaces are parallel to each other. Installed in
From the video area where the plurality of half mirrors are installed, a plurality of virtual images generated by the half mirrors are displayed in a three-dimensional manner by appearing overlapping in a certain gaze direction of the observer.
A three-dimensional video display device comprising one two-dimensional video display device and a plurality of half mirrors. Providing a video area in which a half mirror is not installed in the plurality of video areas;
2. The three-dimensional image display device according to claim 1, wherein an image region that can be seen only as a plane parallel to a certain viewing direction of the observer is provided. A full mirror corresponding to the size and position of the plurality of half mirrors is installed,
3. The 3D image display device according to claim 1, wherein the 3D image can be displayed also in a gaze direction opposite to a certain gaze direction of the observer.

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