CN102116968B - Stereoscopic liquid crystal grating screen and stereoscopic liquid crystal displayer - Google Patents

Abstract

An embodiment of the present invention provides a three-dimensional liquid crystal grating screen and a three-dimensional liquid crystal display, wherein the three-dimensional liquid crystal grating screen is formed by a conductive substrate and an array substrate in a box, and a liquid crystal is arranged between the boxes, and the inner side of the conductive substrate and the array substrate Alignment films are arranged on the inside of the array substrate respectively, and the alignment film is composed of a plurality of alignment units, the alignment units are arranged corresponding to the pixels on the array substrate, and a plurality of wedge-shaped grooves that are sparse on the outside and dense on the inside are formed on the alignment units . In the three-dimensional liquid crystal grating screen described in the embodiment of the present invention, under the control of different data signal voltages, the degree of deflection of the liquid crystal molecules is different, so that the radius of curvature of the three-dimensional liquid crystal grating screen is changed, so that a higher grating density and possible Cylindrical grating with variable pitch.

Description

Three-dimensional liquid crystal grating screen and three-dimensional liquid crystal display

technical field

Embodiments of the present invention relate to a three-dimensional liquid crystal display technology, in particular to a three-dimensional liquid crystal grating screen and a three-dimensional liquid crystal display.

Background technique

Stereoscopic liquid crystal display is a device based on the principle of binocular parallax and cylindrical grating to achieve three-dimensional display effect. Wherein, as shown in FIG. 1 , the cylindrical grating 2 is a sheet-shaped grating composed of a plurality of cylindrical lenses arranged in plane lines with the same structural parameters and performance, and is usually made of plastic material. As shown in FIG. 2 , the existing stereoscopic liquid crystal display mainly includes a two-dimensional flat display 1 and a cylindrical grating 2 , wherein the cylindrical grating 2 is attached to the display surface of the two-dimensional flat display 1 .

When displaying, through the spectroscopic effect of the cylindrical grating 2, the left and right eye images of the two-dimensional flat-panel display 1 are separated, so that the left and right eyes of the viewer see respective images. For example, as shown in FIG. 2 , the viewer watches the image of the non-shaded part on the two-dimensional flat display 1 through the right eye 3 ; and watches the image of the shadow part on the two-dimensional flat display 1 through the left eye 4 . Thereafter, according to the principle of binocular parallax, the viewer fuses the left and right eye images into a stereoscopic image in the brain, thereby achieving a stereoscopic display effect.

In the course of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

The grating density (also called the horizontal period of the grating) of the existing cylindrical grating is relatively low, and cannot precisely match the pixel size of the two-dimensional flat-panel display, so crosstalk and color moiré fringes will occur, thereby affecting the stereoscopic display effect.

The grating pitch of the existing cylindrical grating is fixed, so that the viewer's left or right eye can only see the parallax image in a specific area, but cannot see the correct stereoscopic image or see it in other areas. The stereoscopic effect of the stereoscopic image is not obvious, thereby limiting the range of the stereoscopic viewing area of the stereoscopic liquid crystal display.

Contents of the invention

Embodiments of the present invention provide a three-dimensional liquid crystal grating screen and a three-dimensional liquid crystal display, which are used in a three-dimensional liquid crystal grating screen and a three-dimensional liquid crystal display to achieve higher grating density and variable grating pitch.

An embodiment of the present invention provides a three-dimensional liquid crystal grating screen, wherein the three-dimensional liquid crystal grating screen is formed by a conductive substrate and an array substrate in a box, and a liquid crystal is arranged between the boxes, and the inner side of the conductive substrate and the inner side of the array substrate are respectively arranged There is an alignment film, and the alignment film is composed of a plurality of alignment units, the alignment units are arranged corresponding to the pixels on the array substrate, and a plurality of wedge-shaped grooves with sparse outside and dense inside are formed on the alignment unit.

Another embodiment of the present invention provides a three-dimensional liquid crystal display including the above-mentioned three-dimensional liquid crystal grating screen, which further includes: a two-dimensional flat display, and the three-dimensional liquid crystal grating screen is arranged on a display surface of the two-dimensional flat display.

In the three-dimensional liquid crystal grating screen described in the embodiment of the present invention, under the control of different data signal voltages, the deflection degree of the liquid crystal molecules is different, so that the radius of curvature of the three-dimensional liquid crystal grating screen is changed, so that a higher grating density and possible Cylindrical grating with variable pitch.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of existing cylinder grating;

Figure 2 is a schematic diagram of the light-splitting principle of an existing stereo liquid crystal display

FIG. 3 is a schematic structural view of an embodiment of the three-dimensional liquid crystal grating screen of the present invention;

FIG. 4 is a schematic structural diagram of an alignment unit in the alignment film shown in FIG. 3 .

Detailed ways

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 It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 3 is a structural schematic diagram of an embodiment of the three-dimensional liquid crystal grating screen of the present invention, as shown in the figure, the three-dimensional liquid crystal grating screen is formed by a pair of boxes of a conductive substrate 10 and an array substrate 20, and a liquid crystal 30 is arranged between the boxes, and the conductive substrate Alignment films 40 are provided on the inner side of 10 and the inner side of the array substrate 20 respectively. Wherein, the conductive substrate 10 can be formed by directly depositing indium tin oxide material on clean glass. The array substrate 20 is provided with a pixel array, and each pixel is controlled by a thin film transistor (Thin Film Transistor, referred to as: TFT), and the TFT can be formed on a glass substrate by semiconductor process technologies such as film formation technology, photolithography technology, and etching technology. . The liquid crystal 30 may be formed between the cells by using a liquid crystal drop filling (One Drop Filling, ODF for short) process.

The alignment film 40 is composed of a plurality of alignment units, and the alignment units are arranged corresponding to the pixels on the array substrate 20 . Specifically, the alignment units may be arranged in one-to-one correspondence with the pixels on the array substrate 20 ; or, multiple alignment units may be arranged in correspondence with one pixel on the array substrate 20 .

Fig. 4 is a structural representation of an alignment unit, as shown in the figure, is formed with a plurality of wedge-shaped grooves 41 that are sparse on the outside and dense on the inside, and these wedge-shaped grooves 41 can be passed on the coating film 42 by using light or rubbing ( Rubbing) and other orientation processes. Specifically, as shown in the figure, the distance between two adjacent wedge-shaped grooves 41 is AB>BC>CD>DE>EF. Since the thickness of the alignment film 40 is consistent, the heights of the multiple wedge-shaped grooves 41 are the same, and each The slope angles of the wedge-shaped grooves 41 gradually increase from both sides to the center, that is, θ ₅ >θ ₄ >θ ₃ >θ ₂ >θ ₁ , thus forming a structure that is sparse on the outside and dense on the inside.

In this embodiment, by setting an alignment film formed with a plurality of wedge-shaped grooves that are sparse on the outside and dense on the inside, the liquid crystal molecules can be given a certain pretilt angle. The data signal is applied to the pixel to form an electric field between the cells, so that the liquid crystal molecules are deflected under the action of the electric field, and finally achieve a gradual and orderly arrangement, thereby changing the direction of the transmitted light. Specifically, as shown in Figure 3, in an alignment unit, the liquid crystal molecules near the middle are approximately arranged vertically, while the liquid crystal molecules near the two sides are approximately arranged horizontally, so that the light transmitted from the middle passes through the liquid crystal molecules. The distance is longer, so that a cylindrical lens unit is formed in terms of optical performance, so it can play a light splitting effect similar to that of the existing cylindrical grating 2 .

The advantage of the three-dimensional liquid crystal grating screen described in this embodiment over the existing cylindrical grating 2 is that under the control of different data signal voltages, the deflection degrees of the liquid crystal molecules are different, so that the radius of curvature of the three-dimensional liquid crystal grating screen changes, Cylindrical gratings with higher grating density and variable grating pitch can thus be realized. Moreover, since the three-dimensional liquid crystal grating screen in this embodiment is not made of plastic materials, it does not have the defect that the thickness of the existing cylindrical grating limits the light transmittance.

In addition, according to the requirements for grating density and pitch, the wedge-shaped groove structure on the alignment unit can be adjusted appropriately. The alignment films can have the same orientation or different orientations, and the wedge-shaped grooves in each alignment unit of the alignment film can be arranged symmetrically or asymmetrically along the central part, but in practice, when the upper and lower alignment films have When the orientation is the same and the wedge-shaped grooves are symmetrically arranged, the grating density and pitch are easier to control, and the light-splitting effect is better.

In practical application, the three-dimensional liquid crystal grating screen described in the above embodiments can be arranged on the display surface of a two-dimensional flat display to form a three-dimensional liquid crystal display. Specifically, the three-dimensional liquid crystal grating screen can be pasted on the display surface of the two-dimensional flat display. Moreover, preferably, the pixel size of the array substrate 20 in the three-dimensional liquid crystal grating screen can be made consistent with the sub-pixel size of the two-dimensional flat-panel display.

Owing to adopting the three-dimensional liquid crystal grating screen described in the above-mentioned embodiment to replace the existing cylindrical grating 2 to form a three-dimensional liquid crystal display, variable grid pitches are realized under the drive of different data signal voltages, thereby not affecting the three-dimensional viewable area. The range is limited, and it can form a higher grating density, so it is easy to precisely match the pixel size of a two-dimensional flat panel display, thereby avoiding crosstalk and color moiré fringes, and achieving a better three-dimensional display effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. A three-dimensional liquid crystal grating screen, characterized in that, the three-dimensional liquid crystal grating screen is formed by a conductive substrate and an array substrate to a box, and liquid crystals are arranged between the boxes, and the inside of the conductive substrate and the inside of the array substrate are respectively arranged There is an alignment film, and the alignment film is composed of a plurality of alignment units, the alignment units are arranged corresponding to the pixels on the array substrate, and a plurality of wedge-shaped grooves with sparse outside and dense inside are formed on the alignment unit. 2 . The three-dimensional liquid crystal lenticular screen according to claim 1 , wherein the alignment film disposed on the inner side of the conductive substrate has the same orientation as the alignment film disposed on the inner side of the array substrate. 3 . 3. The three-dimensional liquid crystal lenticular screen according to claim 1, wherein the wedge-shaped grooves in each alignment unit are symmetrically arranged. 4 . The three-dimensional liquid crystal lenticular screen according to claim 1 , wherein the alignment units are arranged in one-to-one correspondence with the pixels on the array substrate. 5. The three-dimensional liquid crystal lenticular screen according to claim 1, wherein a plurality of alignment units are arranged corresponding to one pixel on the array substrate. 6. A three-dimensional liquid crystal display comprising the three-dimensional liquid crystal grating screen described in any one of claims 1 to 5, further comprising: a two-dimensional flat display, the three-dimensional liquid crystal grating screen being arranged on the top of the two-dimensional flat display displayed on the surface. 7. The three-dimensional liquid crystal display according to claim 6, wherein the three-dimensional liquid crystal grating screen is attached to the display surface of the two-dimensional flat display.

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