A stereoscopic display device based on double refraction cylindrical lens

Abstract

A stereoscopic display device based on a birefringent cylindrical lens is composed of a 2D display panel and a birefringent cylindrical lens grating, wherein the birefringent cylindrical lens grating is placed in front of the 2D display panel; the 2D display panel is used to provide a parallax synthetic image; on the parallax synthetic image, texture units from different parallax images are arranged in columns; the texture units in each column are composed of a number of pixels arranged in the horizontal direction; the odd and even rows of texture units on the 2D display panel have orthogonal polarization directions; the birefringent cylindrical lens grating is made of a birefringent material, and on its cylindrical lens curved surface, it has relative refractive indices n1 and n2 for light, respectively; the birefringent cylindrical lens grating can project texture units from different parallax images to different spatial directions, thereby forming viewpoints; when the human eye is at different viewpoints, the corresponding parallax images can be seen, thereby generating stereoscopic vision. Due to the different relative refractive indices, the imaging depths of the texture units in odd and even rows are different.

Description

Technical Field

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

[0002] Stereoscopic display technology is a display technology that can achieve true reproduction of stereoscopic scenes. It can provide different parallax images to the human eye, so that people can have stereoscopic vision. Traditional stereoscopic display devices have a single imaging depth, which can easily cause visual fatigue. The present invention proposes a stereoscopic display device based on a birefringent cylindrical lens, which can provide two imaging depths, thereby reducing visual fatigue. Summary of the invention

[0003] The present invention provides a stereoscopic display device based on a double-refractive cylindrical lens. Figure 1 The structure diagram of the stereoscopic display device based on the birefringent cylindrical lens is shown in FIG. The stereoscopic display device based on the birefringent cylindrical lens is composed of a 2D display panel and a birefringent cylindrical lens grating, and the birefringent cylindrical lens grating is placed in front of the 2D display panel.

[0004] For further information, please refer to Figure 2 , the 2D display panel is used to provide a parallax composite image. On the parallax composite image, texture units from different parallax images are arranged in columns; please refer to Figure 3 ,The texture unit in each column consists of several pixels arranged in the horizontal direction.

[0005] For further information, please refer to Figure 4 , the odd-numbered rows of texture units on the 2D display panel have polarization direction A, and the even-numbered rows of texture units have polarization direction B; polarization direction A is orthogonal to polarization direction B.

[0006] Furthermore, the birefringent cylindrical lens grating is made of a birefringent material, and on its cylindrical lens curved surface, it has a relative refractive index n for the light in polarization direction A and polarization direction B respectively. 1 and n 2 .

[0007] For further information, please refer to Figure 5 The birefringent cylindrical lens grating can project texture units from different parallax images to different spatial directions to form viewpoints. When the human eye is at different viewpoints, it can see the corresponding parallax images, thus generating stereoscopic vision.

[0008] Specifically, since the birefringent cylindrical lens grating has relative refractive indices n1 and n2 for light in polarization direction A and polarization direction B, respectively, it can have different focal lengths. f 1 and f 2. Since the distance from the birefringent cylindrical lens grating to the 2D display panel is d According to the lens imaging formula, the texture units with polarization direction A in odd rows should be imaged at a distance of 1 from the birefringent cylindrical lens grating. l 1 Position; the texture units of the even-numbered rows with polarization direction B should be imaged at a distance of 1 / 2 from the birefringent cylindrical lens grating image distance l 2 Location. Specifically, , .

[0009] In summary, when a viewer views a parallax image, because the texture units in odd-numbered rows and the texture units in even-numbered rows have different image distances, the present invention can provide image display at two different depths, thereby reducing visual fatigue. 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 structure of the present invention.

[0012] Figure 2 It is a schematic diagram of parallax image arrangement of the present invention.

[0013] Figure 3 Schematic diagram of the texture unit of the present invention.

[0014] Figure 4 FIG. 2 is a schematic diagram of a 2D display panel of the present invention.

[0015] Figure 5 This is the optical path diagram of the present invention.

[0016] Icons: 100 - 2D display panel; 200 - birefringent cylindrical lens grating; 110 - first texture unit column; 120 - second texture unit column; 130 - third texture unit column; 300 - texture unit; 101 - odd-numbered rows of texture units; 102 - even-numbered rows of texture units.

[0017] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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

[0022] Figure 1 The schematic diagram of the structure of a stereoscopic display device based on a birefringent cylindrical lens provided in this embodiment is composed of a 2D display panel 100 and a birefringent cylindrical lens grating 200 , wherein the birefringent cylindrical lens grating 200 is placed in front of the 2D display panel 100 .

[0023] Please refer to Figure 2 , the 2D display panel 100 is used to provide a parallax synthesis image. On the parallax synthesis image, texture units from different parallax images are arranged in columns. The parallax synthesis image in this embodiment is composed of three parallax images, and the first texture unit column 110, the second texture unit column 120 and the third texture unit column 130 are respectively from the parallax image 1, the parallax image 2 and the parallax image 3, which are alternately arranged in columns in the horizontal direction.

[0024] Please refer to Figure 3 , the texture unit 300 in each column is composed of a number of pixels arranged in the horizontal direction. Taking the third texture unit column 130 as an example, the texture unit 300 in this column is composed of 3 pixels arranged in the horizontal direction.

[0025] Please refer to Figure 4, the odd-numbered rows of texture units 101 on the 2D display panel 100 are covered with polarizers with polarization direction A, and the even-numbered rows of texture units 102 are covered with polarizers with polarization direction B; polarization direction A is orthogonal to polarization direction B.

[0026] Furthermore, the birefringent cylindrical lens grating 200 is made of birefringent material, specifically, it is formed by curing liquid crystal material in a cylindrical lens grating-shaped mold. The liquid crystal molecules have birefringent properties and the orientation vectors are in the same direction when they are cured. Therefore, the birefringent cylindrical lens grating 200 formed after curing has birefringent properties. On its cylindrical lens curved surface, it has relative refractive index n for light in polarization direction A and polarization direction B, respectively. 1 and n 2 , n 1 and n 2 They are 1.59 and 1.71 respectively.

[0027] Please refer to Figure 5 The birefringent cylindrical lens grating 200 can project texture units from different parallax images to different spatial directions to form viewpoints. Among them, the first texture unit column 110, the second texture unit column 120 and the third texture unit column 130 are projected and converged to viewpoint 1, viewpoint 2 and viewpoint 3 respectively. Then the human eye can see parallax image 1, parallax image 2 and parallax image 3 at viewpoint 1, viewpoint 2 and viewpoint 3 respectively, thereby generating stereoscopic vision.

[0028] Furthermore, since the birefringent cylindrical lens grating 200 has relative refractive indices n1 and n2 for the light in polarization direction A and polarization direction B, respectively, it can have different focal lengths. f 1 and f 2 , f 1 and f 2 5.1 mm and 5.2 mm respectively. Due to the distance from the birefringent cylindrical lens grating to the 2D display panel d According to the lens imaging formula, the texture unit 101 with polarization direction A in the odd number of rows should be imaged in front of the birefringent cylindrical lens grating image. l 1 The texture unit 102 with polarization direction B in the even-numbered rows should be imaged in front of the birefringent cylindrical lens grating l 2 Location. Specifically, l 1 = -255 mm; l 2 =-130 mm.

[0029] In summary, when a viewer views a parallax image, because the texture units 101 in odd-numbered rows and the texture units 102 in even-numbered rows have different image distances, the present invention can provide image display at two different depths, thereby reducing visual fatigue.

Claims

1. A three-dimensional display device based on a birefringent cylindrical lens, characterized in that: The stereoscopic display device based on a double-refractive cylindrical lens is composed of a 2D display panel and a double-refractive cylindrical lens grating, wherein the double-refractive cylindrical lens grating is placed in front of the 2D display panel; the 2D display panel is used to provide a parallax synthetic image; on the parallax synthetic image, texture units from different parallax images are arranged in columns in sequence; the texture units in each column are composed of a number of pixels arranged in the horizontal direction; the odd-numbered rows of texture units on the 2D display panel have polarization direction A, and the even-numbered rows of texture units have polarization direction B; the polarization direction A is orthogonal to the polarization direction B; the double-refractive cylindrical lens grating is made of a double-refractive material, and on its cylindrical lens curved surface, it has relative refractive indices n1 and n2 for light in polarization directions A and polarization directions B, respectively; the double-refractive cylindrical lens grating can project texture units from different parallax images to different spatial directions, respectively, thereby forming viewpoints; when the human eye is at different viewpoint positions, the corresponding parallax images can be seen, thereby generating stereoscopic vision.

2. A three-dimensional display device based on a birefringent cylindrical lens as claimed in claim 1, characterized in that: The birefringent cylindrical lens grating forms different focal lengths for the light in polarization direction A and polarization direction B. f 1 and f 2; The distance from the birefringent cylindrical lens grating to the 2D display panel is d ; The odd-numbered rows of texture units with polarization direction A are imaged at the distance from the birefringent cylindrical lens grating image distance Position; the texture units of the even-numbered rows with polarization direction B are imaged at a distance from the birefringent cylindrical lens grating image distance Location.

Images