CN203688918U

CN203688918U - Stereo display device

Info

Publication number: CN203688918U
Application number: CN201320833989.5U
Authority: CN
Inventors: 王海燕; 魏伟
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2013-12-17
Filing date: 2013-12-17
Publication date: 2014-07-02
Anticipated expiration: 2023-12-17

Abstract

The utility model relates to the technology field of display, and specifically relates to a stereo display device. The stereo display device comprises a display panel and a binary diffraction grating which is parallel to the display panel. The stereo display device utilizes the binary diffraction grating to replace the cylindrical lens grating in the prior art, and controls light propagation by light diffraction to achieve the purpose of light beam focusing, therefore, various aberrations are balanced perfectly, crosstalk phenomenon generation is thereby reduced effectively, and a display effect of the stereo display device is improved substantially. In addition, at the same focal length, the thickness of the binary diffraction grating is smaller, and therefore the thickness of the stereo display device is reduced substantially. At the same time, because the binary diffraction grating can be processed by photoetching process, the process is simple, and the production cost of the stereo display device is reduced substantially.

Description

3 d display device

Technical field

The utility model relates to display technique field, is specifically related to a kind of 3 d display device.

Background technology

The method that realizes stereo display has a lot, wherein bore hole raster type free 3 stereo display, expense simple with implementation method compared with low, imaging effect good and become the important stereo display mode of a class.Grating-type free stereo display device is made up of display panel and grating layer, the left eye viewing area that grating layer can be crisscross arranged position on display panel separates with the light of right eye viewing area outgoing, make beholder in the situation that not needing to wear the utility appliance such as 3D glasses or the helmet, left eye receives the light of left eye viewing area outgoing, right eye receives the light of right eye viewing area outgoing, thereby make right eye receive respectively the image with parallax, according to binocular parallax principle, the image co-registration that beholder's brain receives right and left eyes becomes stereo-picture, thereby realize stereo display effect.

At present conventionally have two kinds of parallax baffle and cylindrical lens raster for the grating of stereo display, the 3 d display device based on parallax baffle exist brightness low, watch the weak points such as comfort level is not good enough; 3 d display device based on cylindrical lens raster have brightness high, watch comfort level to be better than the advantages such as parallax baffle 3 d display device, therefore obtained increasing concern.

3 d display device based on cylindrical lens raster as shown in fig. 1, in the bright dipping side of display panel 1, a cylindrical lens raster 2 is set, the light of the right and left eyes viewing area outgoing of display panel 1 is after cylindrical lens raster 2, due to its refraction action, there is deviation in the direction of propagation of light, thereby the light focusing of left eye viewing area 11 outgoing, in left eye, in right eye, is realized to stereo display effect by the light focusing of right eye viewing area 22 outgoing.Cylindrical lens raster can be the common cylindrical lens raster shown in Fig. 1, also can be liquid crystal lens grating as shown in Figure 2, liquid crystal lens grating comprises the first electrode 31 and the second electrode 32 that are oppositely arranged, between the first electrode 31 and the second electrode 32, be provided with liquid crystal layer 33, distribute by the voltage of controlling on the first electrode 31 and the second electrode 32, control the deflection of diverse location liquid crystal molecule, thereby liquid crystal layer 33 is produced as the effect of Fig. 1 central column face lenticulation 2.

But, 3 d display device based on cylindrical lens raster of the prior art is deposited still in a lot of shortcomings, for example, as shown in Figure 3, for cylindrical lens raster 2, owing to can not effectively the parallel rays of incident being converged in a focus, can not balance aberration, can produce very large spherical aberration, aberration, coma etc., cause from the light of display panel 1 outgoing can accurately not focusing on left eye and right eye, therefore can produce crosstalk phenomenon, reduce stereo display effect; And cylindrical lens raster 2 must keep certain sagitta, therefore causes the thickness of the 3 d display device based on cylindrical lens raster to decline; Meanwhile, due to the Die price costliness of preparation cylindrical lens raster, and to the very high reason of accuracy requirement designing, cause preparation cost very high, therefore, cause the production cost of the 3 d display device based on cylindrical lens raster to be difficult to compression.

Utility model content

(1) technical matters that will solve

The purpose of this utility model is to provide a kind of can effectively reduce the 3 d display device that crosstalk phenomenon occurs, thereby promotes the display effect of 3 d display device.

(2) technical scheme

Technical solutions of the utility model are as follows:

A kind of 3 d display device, the binary diffraction grating that comprises display panel and be arranged in parallel with described display panel.

Preferably, described binary diffraction grating comprises the first binary diffraction grating and the second binary diffraction grating of alternate setting; Described the first binary diffraction grating for by the light focusing of described display panel left eye viewing area outgoing in left eye, described the second binary diffraction grating for by the light focusing of described display panel right eye viewing area outgoing in right eye.

Preferably, described binary diffraction grating is 8 step quantizing structures.

Preferably, described binary diffraction grating is the binary diffraction lenticulation that utilizes photoetching process to form.

Preferably, described binary diffraction grating is binary diffraction liquid crystal lens grating.

Preferably, described binary diffraction liquid crystal lens grating comprises the first electrode and the second electrode that are oppositely arranged, between described the first electrode and the second electrode, is provided with liquid crystal layer.

Preferably, described binary diffraction grating is arranged on the bright dipping side of described display panel.

Preferably, described 3 d display device also comprises the backlight module that is arranged on described display panel light inlet side, and described binary diffraction grating is arranged between described display panel and backlight module.

(3) beneficial effect

3 d display device provided by the utility model, utilize binary diffraction grating to substitute cylindrical lens raster of the prior art, control the propagation of light by diffraction of light, reach the object that light beam focuses on, therefore can well the various aberrations of balance, thereby effectively reduce the generation of crosstalk phenomenon, significantly promoted the display effect of 3 d display device; And under identical focal length, the thickness of binary diffraction grating is less, therefore can significantly reduce the thickness of 3 d display device; , be prepared because binary diffraction grating can utilize photoetching process, processing is simple meanwhile, therefore can also reduce to a great extent the production cost of 3 d display device.

Brief description of the drawings

Fig. 1 is the structural representation of prior art Stereo display device;

Fig. 2 is the structural representation of liquid crystal lens grating;

Fig. 3 is the figure of the light path signal of Fig. 1 central column face lenticulation;

Fig. 4 is the structural representation of the utility model embodiment Stereo display device;

Fig. 5 is the structural representation of binary diffraction grating in the utility model embodiment.

In figure: 1: display panel; 11: left eye viewing area; 12: right eye viewing area; 2: cylindrical lens raster; 31: the first electrodes; 32: the second electrodes; 33: liquid crystal layer; 4: binary diffraction grating; 41: the first binary diffraction gratings; 42: the second binary diffraction gratings.

Embodiment

Below in conjunction with drawings and Examples, embodiment of the present utility model is described further.Following examples are only for the utility model is described, but are not used for limiting scope of the present utility model.

The 3 d display device providing in the present embodiment as shown in Figure 4, the binary diffraction grating 4 that this 3 d display device mainly comprises display panel 1 and be arranged in parallel with display panel 1; Display panel 1 comprises left eye viewing area 11 and the right eye viewing area 12 of alternate setting, and as shown in Figure 5, the binary diffraction grating 4 in the present embodiment comprises the first binary diffraction grating 41 and the second binary diffraction grating 42 of alternate setting; The first binary diffraction grating 41 is corresponding with left eye viewing area 11, be used for the light focusing of display panel 1 left eye viewing area 11 outgoing in left eye, the second binary diffraction grating 42 is corresponding with right eye viewing area 12, for by the light focusing of display panel 1 right eye viewing area 12 outgoing in right eye; Certainly, binary diffraction grating 41 also can be realized the structure that stereo-picture shows for other.In the time carrying out stereo-picture demonstration, the light of display panel 1 left

eye viewing area

11 and 12 outgoing of right eye viewing area is after binary diffraction grating 4, due to the diffraction of binary diffraction grating 4, there is deviation in the direction of propagation of light, thereby by the light focusing of left eye viewing area 11 outgoing in left eye, the light focusing of right eye viewing area 12 outgoing, in right eye, is realized to stereo display effect; Owing to utilizing the binary diffraction grating 4 can well the various aberrations of balance, thereby effectively reduce the generation of crosstalk phenomenon, significantly promote the display effect of 3 d display device, for example, through simulation and the practice contrast of optical simulation software, can obviously draw, the 3 d display device providing in the present embodiment has obtained effective reduction than the hot spot that the 3 d display device based on cylindrical lens raster produces in prior art, has significantly reduced the generation of crosstalking.And under identical focal length, the thickness of binary diffraction grating 4 is less, this is because binary diffraction grating 4 appears in the thickness of substrate surface wavelength magnitude, therefore can significantly reduce the thickness of 3 d display device, better realizes lightening; Simultaneously, because can utilizing photoetching process, binary diffraction grating 4 is prepared, for example, binary diffraction grating 4 preparation technologies conventional in prior art comprise the steps such as mask, exposure, development and etching, processing technology is simple, therefore, the binary diffraction grating in the present embodiment preferably uses the binary diffraction lenticulation that utilizes photoetching process to form, thereby reduces to the full extent the production cost of 3 d display device.

In order to improve the diffraction efficiency of binary diffraction grating 4, in the present embodiment, preferably use the binary diffraction grating of 8 step quantizing structures, for example, the binary diffraction grating diffration efficiency that the binary diffraction grating diffration efficiency of 4 step quantizing structures can reach 81%, 8 step quantizing structure can reach 95%; Can avoid like this loss of stereo-picture display brightness as far as possible, further promote the display effect of 3 d display device.

Binary diffraction grating 4 in the present embodiment also can utilize liquid crystal lens to realize, and can think binary diffraction liquid crystal lens grating, with liquid crystal lens grating 4 structures are similar as shown in Figure 2, binary diffraction liquid crystal lens grating mainly comprises the first electrode 31 and the second electrode 32 that are oppositely arranged, between the first electrode 31 and the second electrode 32, be provided with liquid crystal layer 33, on the first electrode 31 and the second electrode 32, all have access to control voltage, distribute by the control voltage of adjusting on the first electrode 31 and the second electrode 32, thereby produce specific electric field between the first electrode 31 and the second electrode 32, control the deflection of diverse location liquid crystal molecule, thereby liquid crystal layer 33 is produced as the identical effect of binary diffraction grating 4 in Fig. 4 and Fig. 5.

The position arranging for binary diffraction grating 4, binary diffraction grating 4 can be arranged on the bright dipping side of display panel 1; In the time that display panel 1 is display panels, because display panels itself can be not luminous, therefore, also need to backlight module be set in the light inlet side of display panels, for providing image, display panels shows required light source by backlight module, therefore, and in the time that display panel 1 is display panels, binary diffraction grating 4 can also be arranged between display panel 1 and backlight module, can realize equally stereo display effect.

Above embodiment is only for illustrating the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and modification, therefore all technical schemes that are equal to also belong to protection category of the present utility model.

Claims

1. A stereoscopic display device, characterized in that it comprises a display panel and a binary diffraction grating arranged parallel to the display panel, the binary diffraction grating comprising a first binary diffraction grating and a second binary diffraction grating arranged alternately. Diffraction grating; the first binary diffraction grating is used to focus the light emitted from the left-eye display area of the display panel to the left eye, and the second binary diffraction grating is used to output the light from the right-eye display area of the display panel The light rays are focused on the right eye. the

2 . The stereoscopic display device according to claim 1 , wherein the binary diffraction grating has an 8-step quantization structure. 3 . the

3. The stereoscopic display device according to claim 1 or 2, wherein the binary diffraction grating is a binary diffraction lens grating formed by a photolithography process. the

4. The stereoscopic display device according to claim 1 or 2, wherein the binary diffraction grating is a binary diffractive liquid crystal lens grating. the

5. stereoscopic display device according to claim 4, is characterized in that, described binary diffractive liquid crystal lens grating comprises first electrode and the second electrode that are arranged oppositely, is provided with between the first electrode and the second electrode liquid crystal layer. the

6. The stereoscopic display device according to claim 1 or 2, characterized in that, the binary diffraction grating is arranged on the light emitting side of the display panel. the

7 . The stereoscopic display device according to claim 5 , wherein the binary diffraction grating is arranged on the light emitting side of the display panel. the

8. The stereoscopic display device according to claim 1 or 2, characterized in that, the stereoscopic display device further comprises a backlight module arranged on the light-incident side of the display panel, and the binary diffraction grating is arranged on the Between the display panel and the backlight module. the

9. The stereoscopic display device according to claim 5, characterized in that, the stereoscopic display device further comprises a backlight module arranged on the light-incident side of the display panel, and the binary diffraction grating is arranged on the display panel and the backlight module. the