A multi-resolution stereoscopic display device based on polarization grating

Abstract

The present invention proposes a multi-resolution stereoscopic display device based on a polarization grating, which is composed of a 2D display panel, a polarizer array and a polarization grating placed in sequence from back to front; the 2D display panel is used to provide a parallax synthetic image; in the same pixel area, the parallax image pixels belonging to different viewpoints are arranged in sequence in columns; the pixel areas of different viewing zones have different widths, and the number of parallax image pixel columns they contain is different; the polarizer array is placed close to the 2D display panel, and is arranged according to the pixel area arrangement on the 2D display panel, and polarizers with orthogonal polarization directions are arranged; the polarization directions of two adjacent polarizers are orthogonal; the polarization strips on the polarization grating have the same polarization direction as the polarizers in the polarizer array; the polarization grating is used for directional projection of the parallax synthetic image, and forms a viewing zone in space; the viewer can see the parallax image corresponding to the position in the viewing zone, thereby generating stereoscopic vision.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly to slit grating 3D display technology. Background Art

[0002] Traditional slit grating 3D displays can project each parallax image to different spatial positions in the viewing area through the slit grating, and the parallax images seen by viewers in the viewing area have the same resolution. The present invention proposes a multi-resolution stereoscopic display device based on polarization grating, which can display images with different resolutions at different positions in the viewing area. Therefore, manufacturers can improve the resolution of stereoscopic image display at a specific position when manufacturing the display, thereby optimizing the display effect. Summary of the invention

[0003] The present invention proposes a multi-resolution stereoscopic display device based on a polarization grating. Figure 1 The structure diagram of the multi-resolution stereoscopic display device based on polarization grating is shown in FIG. The multi-resolution stereoscopic display device based on polarization grating is composed of a 2D display panel, a polarizer array and a polarization grating which are placed in sequence from back to front.

[0004] Furthermore, the 2D display panel is used to provide a parallax composite image, which has pixel areas belonging to different viewing zones arranged alternately in a periodic manner. In the same pixel area, the parallax image pixels belonging to different viewpoints are arranged in columns. The pixel areas in different viewing zones have different widths and contain different numbers of parallax image pixel columns.

[0005] Furthermore, the polarizer array is placed close to the 2D display panel, and polarizers with orthogonal polarization directions are arranged according to the pixel area arrangement on the 2D display panel. Specifically, the polarization directions of two adjacent polarizers are orthogonal.

[0006] Furthermore, the polarization grating is composed of polarization strips and light blocking strips. The polarization strips on the polarization grating have the same polarization direction as the polarizers in the polarizer array. The polarization grating is used for directional projection of parallax composite images and forms a viewing area in space. The viewer can see the parallax image corresponding to the position in the viewing area, thereby generating stereoscopic vision.

[0007] Specifically, suppose that the widths of any two different pixel regions 1 and pixel regions 2 on the 2D display panel are w 1 and w 2. The distance from the 2D display panel to the polarization grating is d , the best viewing distance is D , the widths of the viewing areas formed are l 1 and l 2. The pitch of polarizers in the same polarization direction on the polarizer array is pd , the pitch of polarization stripes in the same polarization direction on the polarization grating is p s , the above parameters satisfy: , and .

[0008] Specifically, the polarizer array enables the pixel areas of different viewing zones on the 2D display panel to have specific polarization directions, so that they can be projected by polarization strips with the same polarization direction on the polarization grating. The viewing zones formed by the pixel areas of different viewing zones after projection partially overlap in space. At any viewpoint position in the overlapping area, the pixel areas of different viewing zones provide pixels belonging to the same parallax image, so that the viewer can see the same parallax image belonging to multiple viewing zones, thereby forming a resolution superposition. In the non-overlapping area, the viewer can only see the image belonging to a single viewing zone.

[0009] In summary, through overlapping viewing areas, the present invention can form a superposition of resolutions, thereby providing a multi-resolution stereoscopic image display. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a schematic diagram of the structural principle of the present invention.

[0012] Figure 2 Schematic diagram of viewpoint position according to an embodiment of the present invention.

[0013] Icon: 100-2D display panel; 200-polarizer array; 300 polarization grating; 110-first viewing zone pixel area; 120-second viewing zone pixel area; 210-polarizer in vertical polarization direction; 220-polarizer in horizontal polarization direction; 310 polarization strip in vertical polarization direction; 320-polarization strip in horizontal polarization direction; 111-first parallax image pixel in first viewing zone; 112-second parallax image pixel in first viewing zone; 113-third parallax image pixel in first viewing zone; 114-fourth parallax image pixel in first viewing zone; 121-first parallax image pixel in second viewing zone; 122-second parallax image pixel in second viewing zone.

[0014] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings. Example

[0018] Figure 1 The schematic diagram of the structure of the multi-resolution stereoscopic display device based on polarization grating provided in this embodiment is composed of a 2D display panel 100, a polarizer array 200 and a polarization grating 300 which are sequentially placed from back to front.

[0019] Please refer to Figure 1 and Figure 2 , the 2D display panel 100 is used to provide a parallax synthetic image, which has pixel areas belonging to different viewing zones arranged alternately in a periodic manner. Specifically, a first viewing zone pixel area 110 and a second viewing zone pixel area 120 are arranged thereon. In the same pixel area, the parallax image pixels belonging to different viewpoints are arranged in columns. The pixel areas of different viewing zones have different widths, and the number of parallax image pixel columns they contain is different. Among them, there are 4 columns of pixels in the first viewing zone pixel area 110, namely, the first parallax image pixel 111 of the first viewing zone; the second parallax image pixel 112 of the first viewing zone; the third parallax image pixel 113 of the first viewing zone; and the fourth parallax image pixel 114 of the first viewing zone. There are 2 columns of pixels in the second viewing zone pixel area, namely, the first parallax image pixel 121 of the second viewing zone; and the second parallax image pixel 122 of the second viewing zone.

[0020] Please refer to Figure 1The polarizer array 200 is placed close to the 2D display panel 100, and is arranged according to the pixel area on the 2D display panel 100, and the polarizers with orthogonal polarization directions are arranged. The polarization directions of two adjacent polarizers are orthogonal. Specifically, the first viewing area pixel area 110 corresponds to the polarizer 210 with a vertical polarization direction; the second viewing area pixel area 120 corresponds to the polarizer 220 with a horizontal polarization direction.

[0021] Please refer to Figure 1 The polarization grating 300 is composed of polarization strips and light blocking strips. The polarization strips on the polarization grating 300 have the same polarization direction as the polarizers in the polarizer array. Specifically, the polarization strips 310 in the vertical polarization direction correspond to the polarizers 210 in the vertical polarization direction; the polarization strips 320 in the horizontal polarization direction correspond to the polarizers 220 in the horizontal polarization direction. The polarization grating is used for directional projection of parallax composite images and forms a viewing area in space. For details, please refer to Figure 1 , the pixel area 110 of the first viewing zone passes through the polarizer 210 in the vertical polarization direction and is projected to the first viewing zone by the polarizer strip 310 in the vertical polarization direction; the pixel area 120 of the second viewing zone passes through the polarizer 220 in the horizontal polarization direction and is projected to the second viewing zone by the polarizer strip 310 in the horizontal polarization direction. The viewer can see the parallax image corresponding to the position in the viewing zone, thereby generating stereoscopic vision.

[0022] Please refer to Figure 1 , the first viewing area and the second viewing area formed by the projection of the first viewing area pixel area 110 and the second viewing area pixel area 120 partially overlap in space. Figure 2 , the first parallax image pixel 111 of the first viewing area is projected to viewpoint 1; the second parallax image pixel 112 of the first viewing area is projected to viewpoint 2; the third parallax image pixel 113 of the first viewing area is projected to viewpoint 3; the fourth parallax image pixel 114 of the first viewing area is projected to viewpoint 4; the first parallax image pixel 121 of the second viewing area is projected to viewpoint 2; the second parallax image pixel 122 of the second viewing area is projected to viewpoint 3. Among them, the second parallax image pixel 112 of the first viewing area and the first parallax image pixel 121 of the second viewing area belong to the same parallax image; the third parallax image pixel 113 of the first viewing area and the second parallax image pixel 122 of the second viewing area belong to the same parallax image. Therefore, at the positions of viewpoint 2 and viewpoint 3 in the overlapping area, the viewer can see the same parallax image belonging to the two viewing areas, thereby forming a resolution superposition. At the positions of viewpoint 1 and viewpoint 4 in the non-overlapping area, the viewer can only see the image belonging to the first viewing area.

[0023] Please refer to Figure 1 The width of the first viewing zone pixel area 110 and the second viewing zone pixel area 120 on the 2D display panel 100 is w 1 and w2 are 1 mm and 0.5 mm respectively, the distance from the 2D display panel 100 to the polarization grating 300 d 5 mm, optimal viewing distance D The width of the viewing area is 500 mm. l 1 and l 2 are 100 mm and 50 mm respectively, and the polarizer pitch of the polarizer array 200 in the same polarization direction p d The polarization strip pitch of the polarization grating 300 in the same polarization direction is 1.5 mm. p s is 1.485149 mm, and the above parameters satisfy: , and .

[0024] In summary, through overlapping viewing areas, the present invention can form a superposition of resolutions, thereby providing a multi-resolution stereoscopic image display.

Claims

1. A multi-resolution stereoscopic display device based on polarization grating, characterized in that: The multi-resolution stereoscopic display device based on polarization grating is composed of a 2D display panel, a polarizer array and a polarization grating placed in sequence from back to front; the 2D display panel is used to provide a parallax synthetic image, and pixel areas belonging to different viewing zones are arranged alternately in a periodic manner; in the same pixel area, the parallax image pixels belonging to different viewpoints are arranged in sequence in columns; the pixel areas in different viewing zones have different widths, and the number of parallax image pixel columns they contain is different; the polarizer array is placed close to the 2D display panel, and polarizers with orthogonal polarization directions are arranged according to the pixel area arrangement on the 2D display panel; the polarization directions of two adjacent polarizers are orthogonal; the polarization grating is composed of polarization strips and light blocking strips; the polarization on the polarization grating The strip has the same polarization direction as the polarizer in the polarizer array; the polarization grating is used for directional projection of parallax synthetic images and forms a viewing zone in space; the viewer can see the parallax image corresponding to the position in the viewing zone, thereby generating stereoscopic vision; the viewing zones formed by the pixel areas of different viewing zones after projection partially overlap in space; at any viewpoint position in the overlapping area, the pixel areas of different viewing zones provide pixels belonging to the same parallax image, so that the viewer can see the same parallax image belonging to multiple viewing zones, thereby forming resolution superposition; in the non-overlapping area, the viewer can only see the image belonging to a single viewing zone; there are 4 columns of pixels in the pixel area of ​​the first viewing zone; and there are 2 columns of pixels in the pixel area of ​​the second viewing zone.

2. A multi-resolution stereoscopic display device based on polarization grating according to claim 1, characterized in that: Assume that the widths of any two different pixel regions 1 and 2 on the 2D display panel are w 1 and w 2. The distance from the 2D display panel to the polarization grating is d , the best viewing distance is D , the widths of the viewing areas formed are l 1 and l 2. The pitch of polarizers in the same polarization direction on the polarizer array is p d , the pitch of polarization stripes in the same polarization direction on the polarization grating is p s , the above parameters satisfy: , and .

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