JP2777241B2 - 3D display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] This device is used in a field requiring a stereoscopic image, a stereoscopic television,
3D video, 3D videophone for mutual communication between remote locations,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional display device that can be used as a device used to confirm one's own appearance in an eyeglass shop, a barber shop, a clothing store, and the like.

[Conventional technology]

Conventionally, a means for displaying a three-dimensional image uses polarized glasses or time-division shutter glasses, and selects a video signal incident on the left eye and the right eye in synchronization with a video displayed for each field on the display. . In this method, not only glasses are indispensable and annoying, but also a videophone that talks while watching the observer from each other, the image of the person wearing the glasses is displayed, so there is a disadvantage that the naturalness is significantly impaired. Was.

In order to solve this problem, a lenticular lens system for displaying a three-dimensional image without using glasses has been proposed.
4 (a) and 4 (b) are a plan view and a sectional view showing a conventional technique using a flat display. In this figure, reference numeral 1 denotes a flat display such as a liquid crystal display, a PDP, and a fluorescent display tube. Reference numeral 2 denotes a lenticular lens, which is attached to a display on the flat display 1.

FIG. 5 is an enlarged view of a portion indicated by a dotted line in FIG. The display pixels 3 are arranged on the focal plane of the lenticular lens 2. In such a configuration, when the left-eye pixels (L) and the right-eye pixels (R) are alternately arranged in the display pixels 3, stereoscopic viewing can be performed at an appropriate external position. Since the flat display 1 has a thin protective glass, a short-focus lenticular lens 2 can be used, and a bright image can be obtained. At the same time, light from the adjacent lenticular lens 2 is reduced, and it is easy to secure stereoscopic vision. Further, since the display surface is a flat surface, alignment between the lenticular lens 2 and the display pixel 3 is easy. However, in this method, as shown in FIG. 6, the non-light emitting area 4 between the display pixels 3 is enlarged and projected through the lenticular lens 2 like the display pixel 3 in the light emitting area. In addition, 5 indicates a black stripe and 1 indicates a range of a visual field.

[Problems to be solved by the invention]

By the way, when the right eye ER and the left eye EL are between the black stripes 5 as in the state of FIG. 6, the black stripes 5 do not enter the eyes, but when the head is moved right and left at the observation position, the black stripes are displayed. 5 is noticeable and discomfort and naturalness are impaired when viewing the image. In particular, with respect to a display method in which the position of the head is detected and switching is performed based on the position information of the head, the black stripe 5 described above poses a serious problem in displaying a natural image.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stereoscopic display device capable of ensuring natural and stable stereoscopic vision over a wide range without using glasses.

[Means for solving the problem]

In the stereoscopic display device according to the present invention, a diffusion layer is provided on a protective glass of a display, a lenticular lens sheet is brought into close contact with the diffusion layer, and a focal plane of a lens of the lenticular lens sheet is matched with a position of the diffusion layer. It is a thing.

According to the present invention, a black line thinner than the display pixel pitch of the display is formed between the diffusion layer and the lenticular lens sheet in a direction perpendicular to the lens row of the lenticular lens sheet at a period of the display pixel pitch. is there.

[Action]

In the present invention, the pixels (light-emitting regions) of the display are projected onto the diffusion layer to emit light without gaps. As a result, non-light-emitting regions are eliminated and black stripes are removed.

Further, since the black line is provided, the contrast is improved.

〔Example〕

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a display in which display pixels are arranged on a plane, which comprises a liquid crystal 12 and a color filter 13 sandwiched between two protective glasses 11, 11. 20 is a diffusion layer, and 30 is a lenticular lens sheet.

FIG. 2 is an operation explanatory diagram of the embodiment of FIG. The light emitted from the light emitting region 15 of the color filter 13 has a width larger than the pixel size of the color filter 13. The thickness of the upper protective glass 11 is determined so that the spread is approximately at the pixel pitch, and the diffusion layer 20 is provided thereon. The pixel (light emitting area 15) of the color filter 13 is projected and the diffusion layer
20 emits light without gaps. As a result, there is no non-light emitting region. The position of the diffusion layer 20 is the lenticular lens sheet
Designed to be approximately the focal plane of 30 lenses,
The black stripe 5 as shown in FIG. 6 does not occur. The non-light-emitting region 14 also expands similarly, but has no effect on the image because it does not emit light. In the above example, the case where the image set is photographed in two directions is assumed. Of course.

FIG. 3 shows an embodiment in which a black line 31 is provided between the lenticular lens sheet 30 and the diffusion layer 20 in a direction perpendicular to the lens row direction of the lenticular lens sheet 30.

The black line 31 increases the contrast as a display. The line width of the black line 31 may be smaller than the display pixel. In FIG. 3, the display pixel pitch and the pitch of the black line 31 are the same,
The pitch of the black lines 31 only needs to be equal to or greater than the pitch of the display pixels. Further, the black line 31 is not limited to the line shape shown in FIG. 3, but may be a broken line shape or a dotted line shape.

〔The invention's effect〕

As described in detail above, the present invention provides a diffusion layer on a protective glass of a display, adheres a lenticular lens sheet on this diffusion layer, and moves the focal plane of the lens of the lenticular lens sheet to the position of the diffusion layer. Since they are matched, the black stripe does not enter the eyes when the head is moved left and right at the observation position, and no discomfort or unnaturalness occurs when viewing the image.

In the case where the black line is provided, the contrast is improved, and a more natural three-dimensional image can be seen.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part showing one embodiment of the present invention.
FIG. 3 is an explanatory view of the operation of FIG. 1, FIG. 3 is a perspective view of a main part showing another embodiment of the present invention, and FIGS. 4 (a) and 4 (b) show an example of a conventional stereoscopic image display device. FIG. 5 is an enlarged view in a dotted frame of FIG. 4 (b), and FIG. 6 is an explanatory view of a black stripe in a conventional example. In the figure, 10 is a flat display, 11 is a protective glass, 12 is a liquid crystal, 13 is a color filter, 14 is a non-light emitting area, 15 is a light emitting area, 20 is a diffusion layer, and 30 is a lenticular lens sheet.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Tadahiko Komatsu 1-6, Uchisaiwai-cho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (58) Field surveyed (Int. Cl. ⁶ , DB name) G09F 9 / 00 361 G09F 9/00 316 G03B 35/24

Claims (2)

(57) [Claims] An apparatus for displaying a three-dimensional image using a display having display pixels arranged on a plane and a protective glass provided thereon, and a lenticular lens sheet having a configuration in which a lenticular lens in the shape of a cylinder is juxtaposed. In, providing a diffusion layer on the protective glass of the display,
The lenticular lens sheet is closely attached to the diffusion layer, and the focal plane of the lens of the lenticular lens sheet is matched with the position of the diffusion layer. 2. A black line narrower than a display pixel pitch of a display is formed between a diffusion layer and a lenticular lens sheet in a direction perpendicular to a lens row of the lenticular lens sheet at a period of the display pixel pitch. The three-dimensional display device according to claim 1, wherein: