JP2011002824A - Stereoscopic image display apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a number of visual points with simple configuration.SOLUTION: Images by a plurality of display units 21 are multiply formed by projection optical systems 23 and 29 to display a stereoscopic image. In the display unit 21, a lenticular lens 24 is arranged on an emitting surface of a flat panel display 22, thereby a multi-visual point image is displayed by the flat panel display 22 and the lenticular lens 24.

Description

  The present invention relates to a projection-type stereoscopic image display device. According to the present invention, in a configuration in which images displayed on a plurality of display units are multiplexed and formed by a projection optical system to display a stereoscopic image, each display unit displays a multi-viewpoint image, so that the number of viewpoints can be reduced with a simple configuration. Can be increased.

  2. Description of the Related Art Conventionally, super multi-view display and high-density directional display methods are known as methods of displaying natural stereoscopic images while preventing eye strain caused by contradiction of accommodation congestion. In addition, projection type and flat panel type have been proposed as stereoscopic image display devices for super multi-view display and high-density directional display.

  Here, FIG. 7 is a perspective view showing an example of a projection-type stereoscopic image display apparatus. In this stereoscopic image display device 1, a projection lens 3 and an opening 4 are sequentially arranged on the front surface of a two-dimensional display 2 such as a liquid crystal display panel to constitute one projection optical system, and each projection optical system is connected via a shared lens 5. The emitted light is imaged on the vertical diffusion plate 6. The stereoscopic image display device 1 displays a stereoscopic image by selectively displaying a two-dimensional image corresponding to each display direction continuous in the horizontal direction by the two-dimensional display 2, the projection optical system, and the shared lens 5.

  For this reason, in the stereoscopic image display device 1, the two-dimensional display 2 and the projection optical system are sequentially shifted in the horizontal direction so as to display an image in each display direction. In the example of FIG. 7, the two-dimensional displays 2 related to the adjacent horizontal display directions are grouped in the two-dimensional display array 7 so as to be arranged at different positions in the vertical direction. It is possible to arrange. As indicated by arrows, the projection lens 3 and the aperture 4 of each projection optical system are grouped into a lens array 8 and an aperture array 9, respectively, corresponding to the configuration of the two-dimensional display array 7. The vertical diffusion plate 6 is a transparent plate material that is selectively diffusive only in the vertical direction, and is composed of, for example, a sheet-like lenticular lens.

  On the other hand, FIG. 8 is a perspective view showing an example of a flat panel type stereoscopic image display device. In this stereoscopic image display device 11, a sheet-like lenticular lens 13 is disposed on the front surface of a flat panel display 12 such as a liquid crystal display panel.

  Here, as partially enlarged by an arrow, the flat panel display 12 has a plurality of color pixels (sub-pixels) constituting one pixel of a color image in a row direction (horizontal direction) and a column direction ( (In the vertical direction) are sequentially arranged in a cyclic manner. In the flat panel display 12, color pixels of the same color are sequentially and cyclically arranged in the row direction and the column direction so that the openings are continuous in the horizontal direction. The lenticular lens 13 is configured by repeating a convex lens-shaped cylindrical lens 14 extending in the vertical direction in the horizontal direction, and selectively emits the light emitted from each pixel in the direction of the corresponding viewpoint.

  In the stereoscopic image display device 11, the lenticular lens 13 displays a stereoscopic image by sequentially applying horizontal parallax corresponding to each viewpoint to each pixel continuous in the horizontal direction of the flat panel display 12 in a cyclic manner.

  In the configuration of FIG. 8, each color pixel is sequentially arranged in N cycles in the vertical direction by sequentially offsetting in the horizontal direction, and one cylindrical lens 14 is assigned to 3M color pixels continuous in the horizontal direction. As a result, in the stereoscopic image display device 11, color pixels of the same color are arranged so as to be continuous in an oblique direction, thereby creating a large number of viewpoints (MN viewpoints in the example of FIG. 8) in the horizontal direction. Even in this case, the flat panel display 12 can be set not to require an extremely high resolution only in the horizontal direction. In addition, instead of arranging each color pixel so as to continue in the oblique direction, the lenticular lens may be inclined obliquely with respect to the flat panel display 12. In addition, this patent applicant discloses the following technical literature as a publication in which the literature well-known invention relevant to this invention was described.

Japanese Patent Laid-Open No. 2003-140083 JP 2009-48134 A

  By the way, in this kind of stereoscopic image display device, it is possible to achieve high performance and realize natural stereoscopic display by increasing the number of viewpoints (the number of images provided for stereoscopic viewing) and the resolution. In the projection type stereoscopic image display device, the number of viewpoints can be increased by increasing the number of systems of the projection optical system and the two-dimensional display 2, and the resolution related to the stereoscopic display is increased by increasing the resolution of the two-dimensional display 2. be able to. Therefore, in the projection type, the number of viewpoints and the resolution can be arbitrarily set. However, when the number of viewpoints is increased in the projection type, it is necessary to increase the number of projection optical systems and the two-dimensional display 2 by the number of viewpoints to be increased. .

  On the other hand, in the flat panel type stereoscopic image display device 11, the configuration can be simplified as compared with the projection type, but since the number of viewpoints and the resolution are in a trade-off relationship, the resolution is increased when the number of viewpoints is increased. Will be reduced. Therefore, in order to increase the number of viewpoints without reducing the resolution, there is a problem that the flat panel display 12 needs to be manufactured with extremely high definition.

The present invention has been made in view of the above-described problems, and provides a stereoscopic image display apparatus that can increase the number of viewpoints with a simple configuration. That is, this invention is comprised from the following technical matters.
(1) The invention of claim 1
In a stereoscopic image display device that displays a stereoscopic image by selectively displaying a two-dimensional image corresponding to each viewpoint continuously in the horizontal direction,
A plurality of display units each displaying a multi-viewpoint image;
The light emitted from the plurality of display units is incident and emitted, the multi-viewpoint image is multiplexed, and the viewpoint groups of the plurality of display units are set sequentially in the horizontal direction at the viewpoint position. And a projection optical system
The display unit
An image generation source in which pixels are sequentially arranged in a horizontal direction and a vertical direction,
A lenticular lens or a parallax barrier that is arranged on the emission surface of the image generation source and sequentially generates horizontal parallax corresponding to the emission light from each pixel of the image generation source to generate the multi-viewpoint image; A stereoscopic image display device comprising:

(2) The invention of claim 2
The projection optical system includes a plurality of projection lenses that respectively correspond to the display unit, a screen lens that projects the pupil of the projection lens onto the position of the viewpoint, and a vertical direction that diffuses light emitted from the screen lens in the vertical direction. The stereoscopic image display device according to (1), further comprising a diffusion plate.

(3) The invention of claim 3
(3) The stereoscopic image display device according to (1) or (2), wherein the display unit includes a prism between the lenticular lens or parallax barrier and the projection optical system.

  According to the present invention, it is possible to provide a stereoscopic image display apparatus that can increase the number of viewpoints with a simple configuration.

1 is a perspective view showing a stereoscopic image display device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the stereoscopic image display apparatus of FIG. 1 by taking a cross section in the horizontal direction. FIG. 2 is a cross-sectional view illustrating the stereoscopic image display device of FIG. 1 by taking a cross section in a vertical direction. It is a perspective view which shows the example of the stereo image display apparatus using a prism. FIG. 5 is a cross-sectional view showing the stereoscopic image display device of FIG. 4 by taking a cross section in the horizontal direction. It is a top view which shows the lens array of the three-dimensional image display apparatus of FIG. It is a perspective view which shows an example of the conventional projection type | mold three-dimensional image display apparatus. It is a perspective view which shows an example of the conventional flat panel type stereoscopic image display apparatus.

  Hereinafter, an example of an embodiment according to the present invention will be described.

  FIG. 1 is a perspective view showing a stereoscopic image display apparatus according to the first embodiment of the present invention, and FIGS. 2 and 3 are stereoscopic image display apparatuses 20 shown by taking cross sections in a horizontal direction and a vertical direction, respectively. FIG. The stereoscopic image display device 20 displays a multi-viewpoint image on each of a plurality of display units 21, and multi-forms the multi-viewpoint image with a multi-projection optical system.

  Here, each of the plurality of display units 21 is configured by arranging a lenticular lens 24 on the front surface of a flat panel display 22 as an image generation source. Here, as the flat panel display 22 and the lenticular lens 24, various flat panel displays and lenticular lenses used in the flat panel type stereoscopic image display device can be widely applied. In this embodiment, the flat panel display 22 and the lenticular lens 24 described above with reference to FIG. A panel display 12 and a lenticular lens 13 are applied. Note that a screen on which a display image of the projector is projected can be used as an image generation source instead of the flat panel display. A parallax barrier can also be used instead of the lenticular lens.

  In the stereoscopic image display device 20, the projection lens 23 is disposed on the front surface of the lenticular lens 24, and a viewpoint group of a multi-viewpoint image by the lenticular lens 24 is formed on the pupil plane of the projection lens 23 (see FIG. 6). In the projection lens 23, an opening for shielding light other than the viewpoint group is provided. The stereoscopic image display device 20 multi-forms the multi-viewpoint images respectively generated on the plurality of flat panel displays 22 by the projection lens 23 on the common screen 28. The stereoscopic image display device 20 is configured so that the pupil opening portions of the projection lens 23 are successively and closely connected in the horizontal direction, in other words, the viewpoint group created on the common screen 28 by the flat panel display 22 is in the horizontal direction. The flat panel display 22 and the projection lens 23 are arranged in a modified two-dimensional arrangement sequentially shifted in the horizontal direction so as to be sequentially continuous (see FIG. 6). The flat panel display 22 and the projection lens 23 are arranged in a two-dimensional display array 25 and a lens array 26, respectively. Instead of arranging the color pixels in an oblique direction, the lenticular lens 24 may be inclined, and in this case, a viewpoint group formed by the lenticular lens 24 is formed in an oblique direction, so that it is installed in the projection lens 23. Tilt the opening diagonally.

  The common screen 28 includes a screen lens 29 and a vertical diffusion plate 30. Here, the screen lens 29 forms an image of the pupil of the projection lens 23 at the viewpoint position of the stereoscopic image display device 20. The vertical diffusing plate 30 diffuses the emitted light in the vertical direction, thereby widening the viewing area in the vertical direction and eliminating the difference in viewpoint position due to the vertical position of the projection lens 23. In the example of FIG. 1, the screen lens 29 is disposed on the projection lens 23 side and the vertical diffusion plate 30 is disposed on the viewer side. However, the screen lens 29 may be disposed in the opposite direction.

  Note that forming the viewpoint of the multi-view video by the lenticular lens 24 on the pupil plane of the projection lens 23 can be realized by shifting the lens of the lenticular lens 24 with respect to the flat panel display 22. Alternatively, it can be realized by installing a prism between the lenticular lens 24 (or parallax barrier) and the projection lens 23 as shown in FIG. In the example of FIG. 4, as shown in FIG. 5, the optical path of the emitted light is bent by the prism, and it is not necessary to shift the lens of the lenticular lens 24 with respect to the flat panel display 22. Accordingly, the configuration of the lenticular lens 24 with respect to the flat panel display 22 can be made common in each part.

  According to the above configuration, in the configuration in which images displayed on a plurality of display units are multiplexed and formed by a projection optical system to display a stereoscopic image, a multi-viewpoint image is displayed on each display unit, thereby simplifying the configuration. Can increase the number of viewpoints.

  Further, the projection optical system is constituted by a plurality of projection lenses, a screen lens that projects the pupil of the projection lens to the position of the viewpoint, and a vertical diffusion plate that diffuses the emitted light of the screen lens in the vertical direction. The configuration can be simplified by effectively using the configuration of the projection type stereoscopic image display device.

  In addition, this invention is not limited to the above-mentioned embodiment, It can be set as the form which added the various deformation | transformation to the above-mentioned embodiment in the range which does not deviate from the meaning.

  Specifically, in the above-described embodiment, the case where a projection lens is provided for each flat panel display has been described. However, the present invention is not limited thereto, and a plurality of projection lenses are arranged in each flat panel display. May be simplified.

1, 11, 20 Stereoscopic image display device 2 Two-dimensional display 3, 23 Projection lens 4 Aperture 5 Shared lens 6, 30 Vertical diffusion plate 7, 25 Two-dimensional display array 8, 26 Lens array 9 Aperture array 12, 22 Flat panel Display 13, 24 Lenticular lens 14 Cylindrical lens 21 Display unit 28 Common screen 29 Screen lens

Claims (3)

In a stereoscopic image display device that displays a stereoscopic image by selectively displaying a two-dimensional image corresponding to each viewpoint continuously in the horizontal direction,
A plurality of display units each displaying a multi-viewpoint image;
The light emitted from the plurality of display units is incident and emitted, the multi-viewpoint image is multiplexed, and the viewpoint groups of the plurality of display units are set sequentially in the horizontal direction at the viewpoint position. And a projection optical system
The display unit
An image generation source in which pixels are sequentially arranged in a horizontal direction and a vertical direction,
A lenticular lens or a parallax barrier that is arranged on the emission surface of the image generation source and sequentially generates horizontal parallax corresponding to the emission light from each pixel of the image generation source to generate the multi-viewpoint image; A stereoscopic image display device characterized by comprising: The projection optical system is
A plurality of projection lenses each corresponding to the display unit;
A screen lens that projects the pupil of the projection lens onto the position of the viewpoint;
The stereoscopic image display device according to claim 1, further comprising: a vertical diffusion plate that diffuses light emitted from the screen lens in a vertical direction. The stereoscopic image display apparatus according to claim 1, wherein the display unit includes a prism between the lenticular lens or parallax barrier and the projection optical system.

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