CN111610641B

CN111610641B - A stereoscopic display device based on double refraction cylindrical lens

Info

Publication number: CN111610641B
Application number: CN202010595449.2A
Authority: CN
Inventors: 吕国皎; 赵百川; 刘洋
Original assignee: Chengdu Univeristy of Technology
Current assignee: Xiao Liquan
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2025-01-07
Anticipated expiration: 2040-06-28
Also published as: CN111610641A

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 synthesis image; on the parallax synthesis 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

Stereoscopic display device based on double-refraction cylindrical lens

Technical Field

The present invention relates to display technology, and more particularly, to stereoscopic display technology.

Background

The stereoscopic display technology is a display technology that can realize real reproduction of a stereoscopic scene, which can respectively provide different parallax images for human eyes, thereby enabling a person to generate stereoscopic vision. The conventional stereoscopic display device has a unique imaging depth, and thus is prone to visual fatigue. The invention provides a stereoscopic display device based on a birefringent lenticular lens, which can provide two imaging depths, thereby reducing asthenopia.

Disclosure of Invention

The invention provides a three-dimensional display device based on a double-refraction cylindrical lens. Fig. 1 is a schematic structural diagram of the stereoscopic display device based on the birefringent lenticular lens. The three-dimensional display device based on the double-refraction column lens consists of a 2D display panel and a double-refraction column lens grating, wherein the double-refraction column lens grating is arranged in front of the 2D display panel.

Further, referring to fig. 2, the 2d display panel is used for providing a parallax composite image. On the parallax composite image, the texture units from different parallax images are sequentially arranged in columns, please refer to fig. 3, wherein the texture units in each column are composed of a plurality of pixels arranged in the horizontal direction.

Further, referring to fig. 4,2D, the odd-numbered line texture units on the panel have a polarization direction a, the even-numbered line texture units have a polarization direction b, and the polarization direction a is orthogonal to the polarization direction b.

Further, the birefringent lenticular lens grating is made of a birefringent material, and has relative refractive indexes n ₁ and n ₂ for light rays in the polarization direction a and the polarization direction b, respectively, on the cylindrical lens curved surface thereof.

Further, referring to fig. 5, the birefringent lenticular lens grating may respectively project texture units from different parallax images to different spatial directions, thereby forming viewpoints. The parallax images corresponding to the human eyes can be seen when the human eyes are at different viewpoint positions, thereby generating stereoscopic vision.

Specifically, since the birefringent lenticular lens grating has relative refractive indexes n1 and n2 for the light rays in the polarization direction a and the polarization direction b, respectively, it may have different focal lengths f ₁ and f ₂. Because the distance from the birefringent lenticular lens grating to the 2D display panel is D, according to the lens imaging formula, the texture units with the polarization direction A in the odd-numbered rows should be imaged at the position of the distance l ₁ from the birefringent lenticular lens grating image, and the texture units with the polarization direction B in the even-numbered rows should be imaged at the position of the distance l ₂ from the birefringent lenticular lens grating image. In particular, the method comprises the steps of,,。

In summary, when the viewer views the parallax image, the texture units in the odd lines and the texture units in the even lines have different image distances, so that the invention can provide image display at two different depths, thereby reducing the visual fatigue.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of a parallax image arrangement according to the present invention.

FIG. 3 is a schematic diagram of a texture unit according to the present invention.

Fig. 4 is a schematic diagram of a 2D display panel according to the present invention.

Fig. 5 is a light path diagram of the present invention.

The icons are 100-2D display panel, 200-birefringent lenticular, 110-first texture element column, 120-second texture element column, 130-third texture element column, 300-texture element, 101-odd line texture element, 102-even line texture element.

It should be understood that the above-described figures are merely schematic and are not drawn to scale.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In describing embodiments of the present invention, it should be noted that the terms "first," "second," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Examples

Fig. 1 is a schematic structural diagram of a stereoscopic display device based on a birefringent lenticular lens according to the present embodiment. The stereoscopic display device based on the birefringent lenticular lens is composed of a 2D display panel 100 and a birefringent lenticular lens 200, and the birefringent lenticular lens 200 is placed in front of the 2D display panel 100.

Referring to fig. 2, a 2d display panel 100 is used to provide a parallax composite image. On the parallax composite image, texture units from different parallax images are sequentially arranged in columns. The parallax synthesized image in the present embodiment is composed of 3 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.

Referring to fig. 3, the texture unit 300 in each column is composed of a plurality of pixels arranged in a horizontal direction. Taking the third column 130 of texture units as an example, the texture units 300 in this column are made up of 3 pixels arranged horizontally.

Referring to fig. 4,2D, the odd-numbered line texture units 101 on the panel 100 are covered with the polarizer with the polarization direction a, and the even-numbered line texture units 102 are covered with the polarizer with the polarization direction b, wherein the polarization direction a is orthogonal to the polarization direction b.

Further, the birefringent lenticular lens 200 is made of a birefringent material, specifically, it is formed by curing a liquid crystal material in a lenticular lens-shaped mold, and the liquid crystal molecules have a birefringent property and have uniform director directions when cured, so that the birefringent lenticular lens 200 formed after curing has a birefringent property. On its cylindrical lens curved surface, it has relative refractive indexes n ₁ and n ₂,n₁ and n ₂ of 1.59 and 1.71, respectively, for light rays in polarization direction a and polarization direction b, respectively.

Referring to fig. 5, the birefringent lenticular lens 200 may project texture units from different parallax images to different spatial directions, respectively, to form viewpoints. Wherein 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. The human eye can see the parallax images 1,2, and 3 at the positions of the viewpoints 1,2, and 3, respectively, thereby generating stereoscopic vision.

Further, since the birefringent lenticular lens 200 has the relative refractive indexes n1 and n2 for the light beams in the polarization direction a and the polarization direction b, respectively, it may have different focal lengths f ₁ and f ₂,f₁ and f ₂ of 5.1 mm and 5.2 mm, respectively. Since the distance D from the birefringent lenticular lens grating to the 2D display panel is 5mm, according to the lens imaging formula, the texture units 101 with the polarization direction a in the odd-numbered rows should be imaged at the position l ₁ in front of the birefringent lenticular lens grating, and the texture units 102 with the polarization direction b in the even-numbered rows should be imaged at the position l ₂ in front of the birefringent lenticular lens grating. Specifically, l ₁=-255 mm; l₂ = -130 mm.

In summary, when the viewer views the parallax image, the texture units 101 in the odd lines and the texture units 102 in the even lines have different image distances, so that the present invention can provide image display at two different depths, thereby reducing the visual fatigue.

Claims

1. A stereoscopic display device based on a birefringent cylindrical lens, characterized in that: the stereoscopic display device based on a 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; 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-numbered rows of texture units on the 2D display panel have polarization directions A, and the even-numbered rows of texture units have polarization directions B; the polarization directions A and B are orthogonal; 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 in polarization directions A and B, respectively; the birefringent 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 f1 and _f2 for light in polarization direction _A and polarization direction B; the distance between the birefringent cylindrical lens grating and the 2D display panel is d ; the odd-numbered rows of texture units with polarization direction A are imaged at a distance of 1/2 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.