CN202032466U

CN202032466U - Diffuser plate and liquid crystal back light module

Info

Publication number: CN202032466U
Application number: CN201020694181XU
Authority: CN
Inventors: 张建中; 姚湘潭; 陈珉
Original assignee: Skyworth LCD Shenzhen Co Ltd
Current assignee: Skyworth LCD Shenzhen Co Ltd
Priority date: 2010-12-31
Filing date: 2010-12-31
Publication date: 2011-11-09
Anticipated expiration: 2020-12-31

Abstract

The utility model is applicable to the field of liquid crystal back light and provides a diffuser plate, comprising a transmitting base body, which comprises a light-receiving surface and a light-emitting surface, wherein the light-receiving surface is a smooth surface capable of employing screen printing patterns and the light-emitting surface is an uneven and rugged surface. The diffuser plate provided by the utility model realizes the even diffusion of light by itself through diffusion particles and has the light-receiving surface being the smooth surface allowing the screen printing, thereby shortening a light mixing distance and realizing ideal brightness uniformity in a direct back light module and achieving the objectives of reducing a back light thickness and realizing the lightening and thinning design of displayers. The utility model also provides a liquid crystal back light module, which, with a light source diffusing piece being the above-mentioned diffuser plate capable of shorting the light mixing distance greatly, can be made light and thin.

Description

Diffuser plate and LCD backlight module

Technical field

The utility model belongs to the LCD backlight field, more particularly, relates to a kind of diffuser plate and liquid crystal back of the body module.

Background technology

The diffuser plate role is that spot light or line source diffusion are become area source, all can use diffuser plate in the direct type backlight module.During use, inferior diffuser plate and light source need be kept enough spacings, light passes the brightness uniformity that diffuser plate just can produce desirable hope, and the spacing between this diffuser plate and the light source is exactly a light mixing distance, generally light mixing distance is long, is unfavorable for lightening design backlight.How thereby light mixing distance is shortened the lightening of realization LCD, then become a problem that is worth research and solves.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of diffuser plate, is intended to by carrying out screen printed pattern at its incidence surface, realizes the lightening of LCD thereby light mixing distance shortened.

For solving the problems of the technologies described above, the technical scheme of employing of the present utility model is: a kind of diffuser plate is provided, comprise that one contains the light-transmission substrate of diffusion particle, described light-transmission substrate has an incidence surface and an exiting surface, described incidence surface is one can adopt the shiny surface of screen printed pattern, and described exiting surface is a rough matsurface.

Further, the roughness Ra of described incidence surface≤50.

Further, the roughness Ra of described exiting surface 〉=50.

Further, on described incidence surface, also be coated with the PET film that one deck increases smoothness.

The beneficial effect of the diffuser plate that the utility model provides is: the diffuser plate that the utility model provides, itself can be even with the light scattering by diffusion particle, incidence surface is for carrying out the shiny surface of the various patterns of serigraphy simultaneously, thereby can in direct type backlight module, shorten light mixing distance and produce desirable brightness uniformity, reach the purpose that reduces thickness backlight, realizes the lightening design of display.

The utility model also provides a kind of LCD backlight module, comprises light source diffusion part, and described light source diffusion part is above-mentioned described diffuser plate.

The utility model also provides a kind of beneficial effect of LCD backlight module to be: because the light source that this LCD backlight module is adopted diffusion part is the above-mentioned described diffuser plate that can shorten light mixing distance greatly, can make very frivolously so plant the LCD backlight module, therefore use the display of this LCD backlight module and also just can realize lightening design.

Description of drawings

The structural representation of the diffuser plate that Fig. 1 provides for the utility model.

The specific embodiment

In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

With reference to Fig. 1, the structural representation of the diffuser plate that provides for the utility model preferred embodiment.Described diffuser plate, comprise that one contains the light-transmission substrate 1 of diffusion particle 10, described light-transmission substrate 1 has an incidence surface 11 and an exiting surface 12, and described incidence surface 11 is one to can be used for the shiny surface of screen printed pattern, and described exiting surface 12 is a rough matsurface.

The diffuser plate that the utility model embodiment provides, compare with existing diffuser plate, not only itself can be even with the light scattering by diffusion particle, main is, incidence surface is for carrying out the shiny surface of the various patterns of serigraphy, thereby can in direct-type backlight, shorten light mixing distance and produce desirable brightness uniformity, reach the purpose that reduces thickness backlight, realizes the lightening design of display.

Further, a kind of embodiment of the diffuser plate that provides as the utility model, the roughness Ra of described incidence surface 11≤50.The generation of this incidence surface, general only the need with lower surface polishing in the mould of making diffuser plate, ejection formation just can form shiny surface at the incidence surface 11 of diffuser plate then.But surface smoothness must reach more than the secondary, i.e. roughness Ra≤50 are beneficial to the printing ink of white is printed in the incidence surface 11 of diffuser plate by the mode of serigraphy, and Yin Shua printing ink site is solid full like this, indiffusion and difficult drop-off.Need show bright to be that Ra is the roughness symbol of Unite States Standard, its unit is a micron (a μ m); Surface smoothness is the old standard of surface roughness.Corresponding relation between the two sees the following form 1:

Table 1:

Surface smoothness (unit: level)	Surface roughness Ra (unit: μ m)
		14	0.012
13	0.025
		12	0.050
11	0.1
		10	0.2
9	0.4
		8	0.8
7	1.6
		6	3.2
5	6.3
		4	12.5
3	25
		2	50
1	100

Preferably, a kind of embodiment of the diffuser plate that provides as the utility model, the roughness Ra of described exiting surface 〉=50.Exiting surface 12 must reach the scattering that certain roughness just helps forming light, and its roughness reaches Ra 50 at least.The manufacturing process of this exiting surface 12 is: by add diffusion particle 10 in base materials such as PC or PS, behind the mixing ejection formation, exiting surface 12 is adopted PROCESS FOR TREATMENT such as foaming, form the rough matsurface in top layer, to help scattering of light.

Further, a kind of embodiment of the diffuser plate that provides as the utility model, when the smoothness of incidence surface 11 not enough and can not satisfy the requiring of serigraphy the time, can on incidence surface 11, be coated with one deck PET film, so that incidence surface 11 is enough smooth, thereby can carry out screen printed pattern.PET is milky or polymer light yellow, highly crystalline, surface smoothing, and the transparency height, glossiness is good, and nontoxic, tasteless.

The diffuser plate that the utility model provides can be a larger area sheet material by whole ejection formation, is cut to suitable dimensions then according to actual needs again.

Because the light source that this LCD backlight module is adopted diffusion part is the above-mentioned described diffuser plate that can shorten light mixing distance greatly, can make very frivolously so plant the LCD backlight module, therefore use the display of this LCD backlight module and also just can realize lightening design.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. diffuser plate, comprise that one contains the light-transmission substrate of diffusion particle, described light-transmission substrate has an incidence surface and an exiting surface, it is characterized in that: described incidence surface is one can adopt the shiny surface of screen printed pattern, and described exiting surface is a rough matsurface.

2. diffuser plate according to claim 1 is characterized in that: the roughness Ra of described incidence surface≤50.

3. diffuser plate according to claim 2 is characterized in that: the roughness Ra of described exiting surface 〉=50.

4. diffuser plate according to claim 3 is characterized in that: also be coated with the PET film that one deck increases smoothness on described incidence surface.

5. a LCD backlight module comprises light source diffusion part, it is characterized in that, described light source diffusion part is the described diffuser plate of claim 1 to 4.