A variable depth stereo display device based on double aperture

Abstract

The present invention proposes a variable depth stereoscopic display device based on a double aperture. The variable depth stereoscopic display device based on a double aperture is composed of a cylindrical lens grating, a first aperture, a multi-layer polymer dispersed liquid crystal film, a second aperture and a 2D display panel; pixels belonging to different parallax images are arranged in columns, and the light emitted by them can be projected to different viewpoints through the slits on the second aperture, the multi-layer polymer dispersed liquid crystal film, the slits on the first aperture and the cylindrical lens grating in sequence; when the human eye is at the viewpoint position, the parallax image corresponding to the viewpoint position can be seen, thereby generating stereoscopic vision. The multi-layer polymer dispersed liquid crystal film is composed of a plurality of polymer dispersed liquid crystal films, and the distances between these polymer dispersed liquid crystal films and the first aperture are different, 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 based on a double diaphragm, which can control the imaging light beam through the diaphragm 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 proposes a variable depth stereoscopic display device based on a double diaphragm. Figure 1 The structure diagram of the variable depth stereoscopic display device based on double apertures is shown in FIG. The variable depth stereoscopic display device based on double apertures is composed of a cylindrical lens grating, a first aperture, a multi-layer polymer dispersed liquid crystal sheet, a second aperture and a 2D display panel.

[0004] The first aperture is placed close to the cylindrical lens grating, the multilayer polymer dispersed liquid crystal film is placed between the first aperture and the second aperture, and the 2D display panel is placed behind the multilayer polymer dispersed liquid crystal film.

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

[0006] The multilayer polymer dispersed liquid crystal sheet is composed of multiple polymer dispersed liquid crystal sheets stacked on top of each other. Each polymer dispersed liquid crystal sheet can be in two states: scattering or transparent. At the same time, only one polymer dispersed liquid crystal sheet is in the scattering state, and the rest are in the transparent state.

[0007] The 2D display panel is used to provide parallax composite images, and the light it emits is directional. Pixels belonging to different parallax images are arranged in columns, and the light they emit can be projected to different viewpoints through the slits on the second aperture, the multi-layer polymer dispersed liquid crystal film, the slits on the first aperture, and the cylindrical lens grating in sequence. When the human eye is at the viewpoint position, the parallax image corresponding to the viewpoint position can be seen, thereby generating stereoscopic vision.

[0008] Please refer to Figure 1 , the light from each pixel on the 2D display panel can be projected to the position of the multi-layer polymer dispersed liquid crystal sheet through the slits on the second aperture.

[0009] Please refer to Figure 2, the pixel light is projected through the slit of the second aperture and reaches the polymer dispersed liquid crystal sheet in a scattered state. Due to the modulation of the slit on the second aperture, the image reaching the polymer dispersed liquid crystal 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.

[0010] The reverse extension lines of these light rays converge to form a point of intersection. It should be understood that this intersection is the equivalent point light source of the pixel.

[0011] Assume that the distance from the intersection point to the scattering polymer dispersed liquid crystal sheet is d , the distance from the scattering polymer dispersed liquid crystal sheet to the first aperture is l , the pitch of the slits of the periodic structure of the second aperture is p 2 , the pitch of the first aperture slit is p 1 , the above parameters should satisfy .

[0012] Please refer to Figure 2 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 multilayer polymer dispersed liquid crystal sheet is composed of multiple polymer dispersed liquid crystal sheets, the distance between these polymer dispersed liquid crystal sheets and the first aperture is l If the depths of the intersection points are different, the present invention can obtain multiple intersection points at different depths by setting different polymer dispersed liquid crystal sheets in a scattering state.

[0013] 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

[0014] 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.

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the present invention.

[0017] Icons: 010-A variable-depth stereoscopic display device based on double apertures; 020-Display depth adjustment principle; 100-Rotary lens grating; 200-First aperture; 300-Multilayer polymer dispersed liquid crystal film; 400-Second aperture; 500-2D display panel; 600-Polymer dispersed liquid crystal film in a scattering state; 700-Intersection.

[0018] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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

[0023] Figure 1 This is a schematic diagram of the structure of a variable depth stereoscopic display device 010 based on a double aperture 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.

[0024] The variable depth stereoscopic display device 010 based on a dual aperture is composed of a cylindrical lens grating 100 , a first aperture 200 , a multi-layer polymer dispersed liquid crystal sheet 300 , a second aperture 400 and a 2D display panel 500 .

[0025] The first aperture 200 is placed close to the cylindrical lens grating 100. The multi-layer polymer dispersed liquid crystal film 300 is placed between the first aperture 200 and the second aperture 400, and the 2D display panel 500 is placed behind the multi-layer polymer dispersed liquid crystal film 300.

[0026] The first aperture 200 and the second aperture 400 have slits thereon, and the slits allow light to pass through.

[0027] The multilayer polymer dispersed liquid crystal sheet 300 is composed of a plurality of polymer dispersed liquid crystal sheets stacked on top of each other. Each polymer dispersed liquid crystal sheet can be in two states: scattering or transparent. At the same time, only one polymer dispersed liquid crystal sheet is in the scattering state, and the rest are in the transparent state.

[0028] The 2D display panel 500 is used to provide a parallax composite image, which is composed of a liquid crystal display panel and a parallel light source, so its light is parallel to the z direction. Pixels belonging to different parallax images are arranged in columns in the x direction, and the light emitted by them can be projected to different viewpoints through the slits on the second aperture 400, the multi-layer polymer dispersed liquid crystal film 300, the slits on the first aperture 200, and the cylindrical lens grating. When the human eye is at the viewpoint position, the parallax image corresponding to the viewpoint position can be seen, thereby generating stereoscopic vision.

[0029] Please refer to Figure 1 The light from each pixel on the 2D display panel 500 can be projected to the position of the multi-layer polymer dispersed liquid crystal film 300 through the slits on the second aperture 400 in sequence.

[0030] Please refer to Figure 2 , the pixel light is projected through the slit of the second aperture 400 and reaches the polymer dispersed liquid crystal sheet 600 in a scattering state. Due to the modulation effect of the slit on the second aperture 400, the image reaching the polymer dispersed liquid crystal sheet 600 in a scattering state has stripes, and the light of these images is projected through the first aperture 200 and the cylindrical lens grating 100, and the pixel light belonging to different parallax images reaches the viewpoint 1 and viewpoint 2 positions respectively.

[0031] The reverse extension lines of these light rays converge to form an intersection 700. It should be understood that the intersection 700 is the equivalent point light source of the pixel.

[0032] Assume that the distance from the intersection 700 to the scattering polymer dispersed liquid crystal sheet 600 is d , the distance from the scattering polymer dispersed liquid crystal sheet 600 to the first aperture 200 is l , the pitch of the periodic structure slits of the second aperture 400 p 2 The pitch of the slit of the first aperture 200 is 0.05 mm. p 1is 0.1 mm, the above parameters meet .

[0033] Please refer to Figure 2 According to the above formula, since the cylindrical lens grating 100 and the first aperture 200 are placed closely together, the intersection point 700 should be located behind the cylindrical lens grating 100. l + d Because the multilayer polymer dispersed liquid crystal sheet 300 is composed of a plurality of polymer dispersed liquid crystal sheets, the distance between these polymer dispersed liquid crystal sheets and the first aperture 200 is l If the depths of the intersection points are different, the present invention can obtain multiple intersection points at different depths by setting different polymer dispersed liquid crystal sheets in a scattering state.

[0034] Specifically, the distance between the polymer dispersed liquid crystal sheet in the multi-layer polymer dispersed liquid crystal sheet 300 and the first aperture 200 is l The corresponding intersection points are 4 mm, 4.2 mm and 4.4 mm behind the cylindrical lens grating 100 respectively.

[0035] Since the intersection 700 is an equivalent point light source of each pixel, the intersection position has different depths, and the depth of the image formed by each pixel through the cylindrical lens 100 is also different. Therefore, the parallax image formed by it 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 based on a double aperture, characterized in that: The variable depth stereoscopic display device based on double apertures is composed of a cylindrical lens grating, a first aperture, a multilayer polymer dispersed liquid crystal sheet, a second aperture and a 2D display panel; the first aperture is placed close to the cylindrical lens grating, the multilayer polymer dispersed liquid crystal sheet is placed between the first aperture and the second aperture, and the 2D display panel is placed behind the multilayer polymer dispersed liquid crystal sheet; there are slits on the first aperture and the second aperture, and the slits allow light to pass through; the multilayer polymer dispersed liquid crystal sheet is composed of a plurality of polymer dispersed liquid crystal sheets stacked; each polymer dispersed liquid crystal sheet can be in a scattering state or a transparent state; at the same time, only one polymer dispersed liquid crystal sheet is in a scattering state, and the rest are in a transparent state; the 2D display panel The panel is used to provide a parallax composite image. The light emitted by it is directional. The pixels belonging to different parallax images are arranged in columns. The light emitted by it can be projected to different viewpoints through the slits on the second aperture, the multi-layer polymer dispersed liquid crystal film, the slits on the first aperture and the cylindrical lens grating in sequence; when the human eye is at the viewpoint position, the parallax image corresponding to the viewpoint position can be seen, thereby generating a stereoscopic vision; after the light on the 2D display panel is projected through the slits of the second aperture, it reaches the polymer dispersed liquid crystal film in a scattering state, and is projected through the first aperture and the cylindrical lens grating, and the reverse extension lines of these light rays converge at an intersection; let the distance from the intersection to the polymer dispersed liquid crystal film in a scattering state be d , the distance from the scattering polymer dispersed liquid crystal sheet to the first aperture is l , the pitch of the second aperture periodic structure slit is p 2. The pitch of the first aperture slit is p 1. The above parameters should meet .

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