CN212181183U - Stereoscopic display device based on birefringent cylindrical lens - Google Patents

Abstract

A stereoscopic display device based on a double-refraction cylindrical lens consists of a 2D display panel and a double-refraction cylindrical lens grating, wherein the double-refraction cylindrical lens grating is arranged in front of the 2D display panel; the 2D display panel is used for providing a parallax synthetic image; on the parallax synthetic image, the texture units from different parallax images are arranged in sequence according to columns; the texture unit in each column consists of a plurality of pixels arranged in the horizontal direction; odd and even line texture units on the 2D display panel have orthogonal polarization directions; the birefringent cylindrical lenticulation is made of birefringent material, and on the curved surface of the cylindrical lenticulation, the birefringent cylindrical lenticulation has relative refractive index n for light ray₁And n₂(ii) a The birefringent cylindrical lenticulation can respectively project texture units from different parallax images to different spatial directions, thereby forming viewpoints; when human eyes are at different viewpoint positions, the corresponding parallax images can be seen, and therefore stereoscopic vision is generated. The depth of imaging of the texture elements in odd and even rows is different due to the difference in relative refractive index.

Description

Stereoscopic display device based on birefringent cylindrical lens

Technical Field

The utility model relates to a display technology, more specifically say, the utility model relates to a stereoscopic display technique.

Background

The stereoscopic display technology is a display technology that can realize real reproduction of a stereoscopic scene, and can provide different parallax images to human eyes, respectively, thereby enabling a person to generate stereoscopic vision. The conventional stereoscopic display device has a unique imaging depth and thus is prone to cause visual fatigue. The utility model provides a three-dimensional display device based on birefringence cylindrical lens, it can provide two imaging depth to reduce visual fatigue.

SUMMERY OF THE UTILITY MODEL

The utility model provides a three-dimensional display device based on double refraction column lens. Fig. 1 is a schematic structural diagram of the stereoscopic display device based on the birefringent cylindrical lens. The stereoscopic display device based on the birefringent cylindrical lens consists 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.

Further, referring to fig. 2, the 2D display panel is used for providing a parallax composite image. On the parallax synthetic image, the texture units from different parallax images are arranged in sequence according to columns; referring to fig. 3, the texture unit in each row is composed of pixels arranged in the horizontal direction.

Further, referring to fig. 4, the texture units in the odd lines on the 2D display panel have a polarization direction a, and the texture units in the even lines have a polarization direction b; the polarization direction A is orthogonal to the polarization direction B.

Furthermore, the birefringent cylindrical lens grating is made of birefringent material, and on the curved surface of the cylindrical lens, the birefringent cylindrical lens grating respectively has relative refractive indexes n for light rays in the first polarization direction and the second polarization direction₁And n₂。

Further, referring to fig. 5, the birefringent lenticular lens grating can project texture units from different parallax images to different spatial directions, respectively, so as to form viewpoints. When human eyes are at different viewpoint positions, the corresponding parallax images can be seen, and therefore stereoscopic vision is generated.

Specifically, since the birefringent cylindrical lenticulation has relative refractive indexes n1 and n2 for light rays in the first polarization direction and the second polarization direction respectively, it can have different focal lengthsf ₁Andf ₂. The distance from the birefringent cylindrical lenticulation to the 2D display panel isdAccording to the lens imaging formula, the texture units with the odd lines having the polarization directions A are imaged at the distance from the birefringent cylindrical lens grating image distancel ₁At a location; texture units with even number of lines having polarization direction B should be imaged at the distance from the birefringent cylindrical lenticulation image distancel ₂At the location. In particular, the method comprises the following steps of,

，

。

to sum up, when the viewer watches parallax image, because of the texture unit on the odd number line has different image distance with the texture unit on the even number line, so the utility model discloses can provide image display on two different depths to reduce visual fatigue.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

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

Fig. 3 is a schematic diagram of texture units according to the present invention.

Fig. 4 is a schematic view of the 2D display panel of the present invention.

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

Icon: a 100-2D display panel; 200-birefringent cylindrical lenticulation; 110-a first texture unit column; 120-a second texture unit column; 130-a third texture cell column; 300-texture unit; 101-odd line texture unit; 102-even lines of texture units.

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as 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 present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like are used for distinguishing the description, and are not to 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 cylindrical lens according to this embodiment. The stereoscopic display device based on the birefringent cylindrical lens is composed of a 2D display panel 100 and a birefringent cylindrical lenticular grating 200, wherein the birefringent cylindrical lenticular grating 200 is placed in front of the 2D display panel 100.

Referring to fig. 2, the 2D display panel 100 is used for providing a parallax composite image. On the parallax composite image, texture units from different parallax images are arranged in a row-by-row order. The parallax composite 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 images 1, 2, and 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 pixels arranged in a horizontal direction. Taking the third texture unit column 130 as an example, the texture unit 300 in the column is composed of 3 pixels arranged horizontally.

Referring to fig. 4, the odd-numbered lines 101 of the texture unit 100 are covered with a polarizer with a polarization direction a, and the even-numbered lines 102 are covered with a polarizer with a polarization direction b; the polarization direction A is orthogonal to the polarization direction B.

Further, the birefringent cylindrical lenticular lens 200 is made of a birefringent material, and specifically, is formed by curing a liquid crystal material in a cylindrical lenticular lens-shaped mold, and the liquid crystal molecules have a birefringent property and their director directions are uniform when cured, so that the birefringent cylindrical lenticular lens 200 formed after curing has a birefringent property. On the curved surface of the cylindrical lens, the light beams respectively have relative refractive indexes n for the light beams in the first polarization direction and the second polarization direction₁And n₂，n₁And n₂1.59 and 1.71 respectively.

Referring to fig. 5, the birefringent lenticular lens 200 can project texture units from different parallax images to different spatial directions, respectively, so as to form viewpoints. Wherein the first, second, and third texture unit columns 110, 120, and 130 are projected to converge to viewpoints 1, 2, and 3, respectively. The human eye can see the parallax images 1, 2, and 3 at the viewpoint 1, 2, and 3 positions, respectively, to generate stereoscopic vision.

Further, since the birefringent lenticular lens 200 has relative refractive indexes n1 and n2 for light in the first polarization direction and the second polarization direction respectively, it can have different focal lengthsf ₁Andf ₂，f ₁andf ₂5.1 mm and 5.2 mm respectively. Cylindrical lens due to double refractionDistance from grating to 2D display paneld5 mm, according to the lens imaging formula, the texture units 101 with odd lines having the polarization direction A should be imaged before the birefringent cylindrical lens grating imagel ₁At a location; the texture elements 102 with even rows having polarization direction B should be imaged in front of the birefringent cylindrical lenticulationl ₂At the location. In particular, the method comprises the following steps of,l ₁=-255 mm； l ₂=-130 mm。

to sum up, when the viewer views the parallax image, the texture units 101 in the odd-numbered lines and the texture units 102 in the even-numbered lines have different image distances, so the utility model discloses can provide image display on two different depths to reduce asthenopia.

Claims (2)

1. A stereoscopic display device based on a birefringent cylindrical lens is characterized in that: the stereoscopic display device based on the birefringent cylindrical lens consists of a 2D display panel and a birefringent cylindrical lens grating, wherein the birefringent cylindrical lens grating is arranged in front of the 2D display panel; the 2D display panel is used for providing a parallax synthetic image; on the parallax synthetic image, the texture units from different parallax images are arranged in sequence according to columns; the texture unit in each column consists of a plurality of pixels arranged in the horizontal direction; the texture units in the odd lines on the 2D display panel have a first polarization direction, and the texture units in the even lines have a second polarization direction; the polarization direction A is orthogonal to the polarization direction B; the double-refraction cylindrical lens grating is made of double-refraction material, and the double-refraction material of the double-refraction cylindrical lens grating respectively has relative refractive indexes n for light rays in a polarization direction A and a polarization direction B on the curved surface of the double-refraction cylindrical lens grating₁And n₂(ii) a The birefringent cylindrical lenticulation can respectively project texture units from different parallax images to different spatial directions, thereby forming viewpoints; when human eyes are at different viewpoint positions, the corresponding parallax images can be seen, and therefore stereoscopic vision is generated.

2. A birefringent cylindrical lens based stereoscopic display apparatus according to claim 1, wherein: birefringent cylindrical lenticulation pairForming different focal lengths on the light rays in the first and second polarization directionsf ₁Andf ₂(ii) a The distance from the birefringent cylindrical lenticulation to the 2D display panel isd(ii) a The texture units with the odd lines having the polarization directions A are imaged at the distance from the birefringent cylindrical lens grating image distance

At a location; the texture units with even lines having the polarization direction B are imaged at the distance from the birefringent cylindrical lens grating image distance

At the location.

Images