JP4912773B2 - 3D image display device - Google Patents

Description

  The present invention relates to a stereoscopic image display apparatus. More specifically, the present invention relates to a stereoscopic video display device with improved viewing ability.

  2. Description of the Related Art Conventionally, a three-dimensional video display device that displays a video in a three-dimensional manner using a plurality of half mirrors and a two-dimensional video device installed corresponding to each half mirror is known.

  For example, in Japanese Patent Laid-Open No. 2006-135378, as shown in FIG. 8, the 2D video display surface 1 of the 2D video display device 2 is divided into a plurality of video areas 4a, 6a, 4b, 6b, 4c. An individual image is displayed, and a plurality of half mirrors 3a, 3b, 3c are arranged at a constant inclination, and virtual images 5a, 5b, 5c having different depths appear to overlap the line of sight 201a of the viewer 20a. A 3D video display device U ′ for displaying a 3D video is proposed.

However, in the 3D video display device U ′ according to the proposal, the video can be viewed within the range where the displayed virtual images 5a, 5b, 5c can be directly opposed (between the broken lines P1, P2 in the figure). In order to view the virtual images 5a, 5b and 5c formed by the half mirrors 3a, 3b and 3c, the height of the two-dimensional video display surface 1 is constant. It is necessary to bring the line of sight 201a to the position of the region V. Therefore, there is a problem that the tall viewer 20a has to bend and watch, and conversely, the viewer 20a such as a short child has to watch using the platform.
JP 2006-135378 A

  The present invention has been made in view of the problems of the related art, and an object thereof is to provide a stereoscopic video display device in which the range of viewing is widened and viewing performance is improved.

The stereoscopic video display device of the present invention is a stereoscopic video display device that displays a two-dimensional video so that it can be viewed three-dimensionally, a two-dimensional video display surface that displays a two-dimensional video, and the two-dimensional video display surface. And a plurality of half mirrors that are inclined at a predetermined angle toward the viewer side and arranged at predetermined intervals in the depth direction ,
The two-dimensional video display surface is divided into a plurality of video display areas that can provide a video for generating a virtual image by the half mirror, corresponding to the position of the half mirror,
The plurality of half mirrors are arranged so that the height of the upper ends of the plurality of half mirrors decreases toward the back .

In the stereoscopic image display device according to the present invention, preferably, in the image display area of the two-dimensional image display surface, a virtual image generation area that generates a virtual image with respect to a corresponding half mirror, and a virtual image that does not generate a virtual image. The generation areas are alternately arranged.

Further, the stereoscopic image display device of the present invention, preferably, definitive in the depth direction, the length of the virtual image generation region was longer than the length of the virtual non-generation region.

  In the stereoscopic image display device of the present invention, it is preferable that the number of half mirrors is 2 to 7.

Further, the stereoscopic image display device of the present invention, preferably, the length in the depth direction of the plurality of virtual images generated region, and to become shorter as going to the end.
Furthermore, in the stereoscopic image display device according to the present invention, preferably, the plurality of half mirrors are arranged so that a distance between the front and rear of the plurality of half mirrors becomes narrower toward the back.

  Since the present invention is configured as described above, even if the height of the two-dimensional image display surface is adjusted in accordance with the line of sight of the short viewer, the tall viewer can view it at a distant position. It is possible to view the line of sight toward the image with a natural posture, and an excellent effect of improving the viewing ability is obtained.

  Hereinafter, although the present invention is explained based on an embodiment, referring to an accompanying drawing, the present invention is not limited only to this embodiment.

  A stereoscopic image display apparatus according to an embodiment of the present invention is shown in FIGS.

  The stereoscopic video display device U includes a 2D video display device 2 having a 2D video display surface 1 as shown in FIGS. As shown in FIG. 4, the two-dimensional video display surface 1 is divided so that, for example, a plurality of rectangular video display areas 4a, 6a, 4b, 6b, 4c, 6c, and 4d are arranged in the longitudinal direction. In the illustrated example, the 2D video display surface 1 is installed upward, but the orientation of the 2D video display surface 1 can be set appropriately.

  Here, in the video display areas 4a, 6a, 4b, 6b, 4c, 6c, and 4d, virtual images are generated in which the half mirrors 3a, 3b, 3c, and 3d are installed at predetermined positions corresponding to the areas. Generation regions 4a, 4b, 4c, and 4d, and virtual image non-generation regions 6a, 6b, and 6c where a virtual image is not generated due to the absence of a half mirror are included.

  Further, the ratio m between the widths Wa, Wb, Wc of the virtual image generation regions 4a, 4b, 4c and the widths Da, Db, Dc of the virtual image non-generation regions 6a, 6b, 6c is an example shown in FIG. In this case, 1: 0.25 (= Wa: Da = Wb: Db = Wc: Dc) is set.

  In FIG. 4, hatched patterns in the virtual image non-generating areas 6a, 6b, and 6c represent that an image is displayed in this portion. This is the same in all the figures attached to this specification.

  As shown in FIG. 2, the half mirrors 3a, 3b, 3c, and 3d have a predetermined angle α (for example, 45 degrees (see FIG. 3)) directly above the corresponding virtual image generation regions 4a, 4b, 4c, and 4d. They are arranged in parallel with each other in an inclined state. Here, the planar projection shapes of the half mirrors 3a, 3b, 3c, and 3d and the planar view shapes of the virtual image generation regions 4a, 4b, 4c, and 4d are the same.

  Further, the width of each of the half mirrors 3a, 3b, 3c, 3d in plan view is such that the ratio n is 1: 0.8 (= Wa: Wb = Wb: Wc = Wc: Wd). Therefore, it is made narrow. That is, the width of the half mirror 3a is maximized and the width of the half mirror 3d is minimized. In this case, the widths of the top sides of the half mirrors 3a, 3b, 3c, and 3d are adjusted so that the bottom sides of the half mirrors 3a, 3b, 3c, and 3d are located on the same plane with the bottom sides in contact with the two-dimensional image display surface 1. Yes.

  As a result, the region in which the stereoscopic video can be viewed has a wedge shape, and the visual recognition region (the viewing region (the region V sandwiched between the broken lines P1 and P2 in FIG. 2)) increases as the distance from the stereoscopic video display device U increases. Therefore, even if the height of the two-dimensional image display surface 1 is adjusted in accordance with the line of sight 201a of the short viewer 20a, the tall viewer 20b can watch in a natural position by watching from a distant position. The line of sight 201b can be viewed toward the video.

  In addition, the depth Wa is increased in the virtual image generation areas 4a, 4b, 4c, and 4d, and the heights of the virtual images 5a, 5b, 5c, and 5d are reduced, and the perspective is emphasized. Stereoscopic images can be obtained.

  Further, since the foremost virtual image generation area 4a as viewed from the viewer 20 has a wide width Wa in plan view, the first standing virtual image 5a can be displayed with high resolution.

  As mentioned above, although this invention has been demonstrated based on embodiment, this invention is not limited only to this embodiment, A various change is possible.

  For example, the number of half mirrors 3 is four in the illustrated example, but the number of half mirrors is not limited to four, and is suitably 2 to 7, preferably 3 to 6. It can be the number of sheets (see FIGS. 5 to 7). Limiting the number of images in this way is that a single image results in a poor three-dimensional image, whereas if it is eight or more images, the two-dimensional image display surface 1 is too divided, and the virtual image generation region 4 and the virtual image non-generation region 6 This is because there is a possibility that the width of each of the two becomes narrow and sufficient resolution cannot be maintained.

  The ratio m between the width of the virtual image generation region 4 and the width of the virtual image non-generation region 6 can be 1: 0 to 1: 0.35. The reason for limiting the ratio m in this way is that an effective stereoscopic image is generated when the width of the virtual image generation region 4 that creates the virtual image 5 that is conspicuous from the viewer 20 is made as wide as possible. Note that the ratio m of 1: 0 means that the virtual image non-generating area 6 is not provided.

  Further, the ratio n of the widths of the front and rear half mirrors can be 1: 0.65 to 1: 0.95. The ratio n is limited in this way. If the ratio n is larger than 1: 0.65, the virtual image generation region 4 at the back is extremely narrow as viewed from the viewer 20, the resolution is lowered, and the image display capability is poor. On the other hand, if it is smaller than 1: 0.95, the opening angle of the viewing area V becomes small, and the tall viewer 20b cannot view the stereoscopic image in a natural posture unless it is from a distant position. This is because it is difficult to view.

  Furthermore, in this embodiment, the 2D video display surface 1 is integrated with the 2D video display device 2, but the 2D video display surface 1 and the 2D video display device 2 may be configured separately. it can. For example, the 2D video display surface 1 may be a screen, and a 2D video may be projected from the back by a projector. Further, from the viewpoint of reducing the size of the stereoscopic image display device U, an optical path changing means such as a mirror may be provided between the screen and the projector to change the optical path.

  The present invention can be applied to a video apparatus that generates a stereoscopic video from a planar video.

1 is a perspective view of a stereoscopic video display device according to an embodiment of the present invention. It is the same side view. It is explanatory drawing explaining the principle of the video display of the display apparatus. It is explanatory drawing of the video area | region of the display apparatus. It is a side view of the modification of this invention. It is a side view of the other modification of this invention. It is a side view of the other modification of this invention. It is a side view of the conventional three-dimensional video display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 2D video display surface 2 2D video display device 3 Half mirror 4 Virtual image generation area 5 Virtual image 6 Virtual image non-generation area U Stereoscopic image display apparatus V Viewing area

Claims (6)

A stereoscopic image display device that displays a two-dimensional image so that it appears three-dimensionally,
A two-dimensional image display surface for displaying a two-dimensional image, and a plurality of half mirrors that are inclined at a predetermined angle on the viewer side with respect to the two-dimensional image display surface and arranged at predetermined intervals in the depth direction,
The two-dimensional video display surface is divided into a plurality of video display areas that can provide a video for generating a virtual image by the half mirror, corresponding to the position of the half mirror,
The three-dimensional image display device, wherein the plurality of half mirrors are arranged such that the height of the upper ends of the plurality of half mirrors decreases toward the back. The virtual image generation area that generates a virtual image with respect to a corresponding half mirror and a virtual image non-generation area that does not generate a virtual image are alternately arranged in the video display area of the two-dimensional video display surface. Item 3. The stereoscopic image display device according to Item 1. The stereoscopic image display device according to claim 2 , wherein a length of the virtual image generation region in the depth direction is longer than a length of the virtual image non-generation region in the depth direction . The three-dimensional image display device according to claim 1 or 2, wherein the number of half mirrors is two to seven. 5. The stereoscopic image display device according to claim 2, wherein lengths of the plurality of virtual image generation regions in a depth direction are shortened toward the back. The stereoscopic image display device according to claim 1, wherein the plurality of half mirrors are arranged so that a distance between the front and rear of the plurality of half mirrors becomes narrower as going back.

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