A variable depth stereoscopic display device

Abstract

The present invention proposes a variable depth stereoscopic display device. The variable depth stereoscopic display device is composed of a cylindrical lens grating, a first aperture, a scattering sheet, a second aperture, a liquid crystal display panel, and a light source group; the light from the light source group can project the parallax image on the liquid crystal display panel to different viewpoints via the second aperture, the scattering layer, the first aperture, and the cylindrical lens grating. When the human eye is at different viewpoints, the corresponding parallax images can be seen, thereby generating stereoscopic vision. The scattering sheet has different scattering surfaces, and the distances from these scattering surfaces to the first aperture are different. The light sources on the light source group can project light to different scattering surfaces respectively, so that the present invention can have the function of providing parallax image display at multiple depths.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly to stereoscopic display technology in display. Background Art

[0002] A stereoscopic display device can provide parallax images in different spatial directions, so that viewers can have stereoscopic vision. However, in a conventional stereoscopic display device, the parallax image is only displayed at the plane position where the device is located. Therefore, the present invention proposes a variable depth stereoscopic display device, which can control the imaging beam through a light source so that the image is imaged at a certain depth plane position, and the depth plane position of the image is adjustable. Summary of the invention

[0003] The present invention provides a variable depth stereoscopic display device. Figure 1 The figure is a schematic diagram of the structure of the variable depth stereoscopic display device. The variable depth stereoscopic display device is composed of a cylindrical lens grating, a first aperture, a scattering sheet, a second aperture, a liquid crystal display panel, and a light source group.

[0004] The first aperture is placed close to the cylindrical lens grating, the multi-layer scattering sheet is placed between the first aperture and the second aperture, the liquid crystal display panel is placed behind the multi-layer scattering sheet, and the light source group is placed at the end.

[0005] There are slits on the first and second apertures, which allow light to pass through.

[0006] The scattering sheet has a plurality of scattering surfaces periodically arranged in the vertical direction, and the scattering surfaces are parallel to each other but not in the same plane.

[0007] The liquid crystal display panel uses a transparent liquid crystal screen, which does not change the propagation direction of light and is used to provide a parallax composite image, in which pixels belonging to different parallax images are periodically arranged in columns.

[0008] Please refer to Figure 2 and Figure 3 The light source group is divided into multiple light sources. The light emitted by each light source group is parallel in the horizontal direction and can be projected onto different scattering surfaces on the scattering sheet through the slits on the second aperture.

[0009] The light from the light source group can project the parallax image on the liquid crystal display panel to different viewpoints through the second aperture, the scattering layer, the first aperture and the cylindrical lens grating. When the human eyes are at different viewpoints, the corresponding parallax images can be seen, thereby generating stereoscopic vision.

[0010] Optionally, the positions of the liquid crystal display panel and the second aperture may be interchanged.

[0011] For further information, please refer to Figure 4, the light emitted by the light source group is projected through the slits of the liquid crystal display panel and the second aperture, and then reaches the scattering sheet. Due to the modulation effect of the slits on the second aperture, the image reaching the scattering surface on the scattering sheet has stripes, and the light of these images is projected through the first aperture and the cylindrical lens grating, and the pixel light belonging to different parallax images reaches different viewpoints respectively. The reverse extension lines of these light rays converge to the intersection. It should be understood that the intersection is the equivalent point light source of the pixel.

[0012] Assume that the distance from the intersection point to the scattering surface on the scattering plate is d , the distance from the scattering surface on the scattering plate to the first aperture is l , the pitch of the second aperture slit is p 2. The pitch of the first aperture slit is p 1. The above parameters should meet .

[0013] Please refer to Figure 4 According to the above formula, since the cylindrical lens grating and the first aperture are placed close together, the intersection point should be located behind the cylindrical lens grating. l + d Because the scattering sheet is composed of multiple scattering surfaces, the distance from these scattering surfaces to the first aperture is l If the light sources are different, the present invention can select and light up different groups of light sources, so that the light is projected through different scattering surfaces respectively, and obtain a plurality of intersection positions at different depths.

[0014] In summary, since the intersection is the equivalent point light source of each pixel, the intersection position has different depths, and the depth of the image formed by the cylindrical lens of each pixel is also different, so the parallax image formed will also be at different depth positions, so that the present invention has the function of providing parallax image display at multiple depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a horizontal schematic diagram of a light source group in the present invention.

[0018] Figure 3 It is a vertical schematic diagram of a light source group in the present invention.

[0019] Figure 4 It is a schematic diagram of the present invention.

[0020] Icons: 010-a variable depth stereoscopic display device; 020-light source group principle; 030-display principle diagram; 100-light source group; 110-light source; 111-first light source group; 112-second light source group; 113-third light source group; 120-spectrometric element; 200-liquid crystal display panel; 300-second aperture; 400-scattering sheet; 401-first scattering surface; 402-second scattering surface; 403-third scattering surface; 700-intersection.

[0021] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms “first”, “second”, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Example

[0026] Figure 1 This is a schematic diagram of the structure of a variable depth stereoscopic display device 010 provided in this embodiment. In the figure, the x coordinate represents the horizontal direction in space, the y coordinate represents the vertical direction in space, and the z coordinate represents the direction perpendicular to the xy plane.

[0027] The variable depth stereoscopic display device is composed of a cylindrical lens grating 600 , a first aperture 500 , a diffusion sheet 400 , a second aperture 300 , a liquid crystal display panel 200 , and a light source group 100 .

[0028] The first aperture 500 is placed close to the cylindrical lens grating 600, the multilayer scattering sheet 400 is placed between the first aperture 500 and the second aperture 300, the liquid crystal display panel 200 is placed behind the multilayer scattering sheet 400, and the light source group 100 is placed at the end.

[0029] The first aperture 500 and the second aperture 300 have slits, which are arranged one-dimensionally in the horizontal direction and allow light to pass through.

[0030] Please refer to Figure 3 The scattering sheet 400 has three scattering surfaces 401 - 403 periodically arranged in the vertical direction. The scattering surfaces 401 - 403 are parallel to each other but are not in the same plane.

[0031] The liquid crystal display panel 200 uses a transparent liquid crystal screen, which does not change the propagation direction of light, and is used to provide a parallax composite image, and pixels belonging to different parallax images are periodically arranged in columns.

[0032] Please refer to Figure 2 and Figure 3 , the light source group 100 is composed of a light source 110 and a light splitting element 120, the light splitting element 120 is a cylindrical lens grating, and the light source 110 is divided into a plurality of light sources 111-113. In the horizontal direction, please refer to Figure 2 , the light emitted by each group of light sources is parallel in the horizontal direction and can be projected onto the scattering sheet 400 through the slits on the second aperture 300; in the vertical direction, please refer to Figure 3 The light sources 111 - 113 can respectively project light onto different scattering surfaces 401 - 403 on the scattering sheet through the beam splitter 120 .

[0033] Please refer to Figure 4 , the light from the light source group 100 can project the parallax image on the liquid crystal display panel 200 to different viewpoints via the second aperture 300, the scattering layer 400, the first aperture 500 and the cylindrical lens grating 600. When the human eyes are at different viewpoints, the corresponding parallax images can be seen, thereby generating stereoscopic vision.

[0034] For further information, please refer to Figure 4 , the light emitted by the light source group 100 is projected through the slits of the liquid crystal display panel 200 and the second aperture 300, and then reaches the scattering sheet 400. Due to the modulation effect of the slits on the second aperture 300, the images reaching the scattering surfaces 401-403 on the scattering sheet 400 have stripes, and the light of these images is projected through the first aperture 500 and the cylindrical lens grating 600, and the pixel light belonging to different parallax images reaches different viewpoints respectively. The reverse extension lines of these light rays converge to the intersection 700. It should be understood that the intersection is the equivalent point light source of the pixel.

[0035] Assume that the distance from the intersection point 700 to the scattering surface of the scattering plate 400 is d , the distance from the scattering surface on the scattering sheet 400 to the first aperture 500 is l , the pitch of the second aperture slit 300 p 2 is 0.05 mm, the pitch of the first aperture slit 500 p 1 is 0.1 mm, the above parameters meet .

[0036] Please refer to Figure 4 According to the above formula, since the cylindrical lens grating and the first aperture are placed close together, the intersection point should be located behind the cylindrical lens grating. l + d Because the scattering sheet is composed of multiple scattering surfaces, the distance from these scattering surfaces to the first aperture is l If the light sources are different, the present invention can select and light up different groups of light sources, so that the light is projected through different scattering surfaces respectively, and obtain a plurality of intersection positions at different depths.

[0037] Specifically, the distance between the scattering surfaces 401 to 403 in the scattering sheet 400 and the first aperture 500 is l The corresponding intersection points are 4 mm, 4.2 mm and 4.4 mm behind the cylindrical lens grating 100 respectively.

[0038] In summary, since the intersection 700 is the equivalent point light source of each pixel and the intersection position has different depths, the depth of the image formed by each pixel through the cylindrical lens 600 is also different, so the parallax image formed will also be at different depth positions, so that the present invention has the function of providing parallax image display at multiple depths.

Claims

1. A variable depth stereoscopic display device, characterized in that: The variable depth stereo display device is composed of a cylindrical lens grating, a first aperture, a scattering sheet, a second aperture, a liquid crystal display panel, and a light source group; the first aperture is placed close to the cylindrical lens grating, the multi-layer scattering sheet is placed between the first aperture and the second aperture, the liquid crystal display panel is placed after the multi-layer scattering sheet, and the light source group is placed at the end; there are slits on the first aperture and the second aperture, and the slits allow light to pass through; the scattering sheet has a plurality of scattering surfaces periodically arranged in the vertical direction, and the scattering surfaces are parallel to each other but not in the same plane; the liquid crystal display panel adopts a transparent liquid crystal screen, which does not change the propagation direction of light and is used to provide a parallax synthetic image, and pixels belonging to different parallax images are periodically arranged in columns; the light The light source group is divided into multiple groups of light sources, and the light emitted by each group of light sources is parallel in the horizontal direction, and can be projected to different scattering surfaces on the scattering sheet through the slits on the second aperture. The light from the light source group can project the parallax image on the liquid crystal display panel to different viewpoints through the second aperture, the scattering layer, the first aperture and the cylindrical lens grating. When the human eyes are at different viewpoints, the corresponding parallax images can be seen, thereby generating stereoscopic vision. The light emitted by the light source group is projected through the liquid crystal display panel and the slits of the second aperture, reaches the scattering sheet, and is projected by the first aperture and the cylindrical lens grating. The reverse extension lines of these light rays converge to an intersection. Let the distance from the intersection to the scattering surface on the scattering sheet be d , the distance from the scattering surface on the scattering plate to the first aperture is l , the pitch of the second aperture slit is p 2. The pitch of the first aperture slit is p 1. The above parameters should meet .

2. A variable depth stereoscopic display device as claimed in claim 1, characterized in that: The positions of the liquid crystal display panel and the second aperture are interchanged.

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