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Diffusion plate for backlight assembly of liquid crystal TV. and production method

A technology for backlight modules and LCD TVs, applied in optics, nonlinear optics, instruments, etc., can solve the problems of difficult quality control, low production efficiency, and complex production processes in online production technology, and achieve good UV resistance and service life. Long, dimensionally stable effect

Inactive Publication Date: 2005-01-05
常州丰盛光电科技股份有限公司
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Problems solved by technology

It can be seen from the production methods of the above two kinds of diffusion plates that there are disadvantages such as relatively complicated production process, low production efficiency, and difficult quality control of online production technology.

Method used

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  • Diffusion plate for backlight assembly of liquid crystal TV. and production method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing.

[0032] One of the specific implementations of the diffusion plate used in the backlight module of the LCD TV according to the present invention is shown in Fig. 1 . A diffuser plate for LCD TV backlight modules, which consists of a substrate layer 1, one side layer 2, and the other side layer 3, is a thermoplastic co-extruded composite plate with a three-layer layered structure; the substrate layer 1 is composed of Methyl methacrylate-styrene copolymer (MS) is a blended layer composed of a base material and a silicone (Silicone) light diffusing agent; one side layer 2 and the other side layer 3 are both made of polymethacrylic acid Methyl ester (PMMA) is a blend layer composed of base material, methyl methacrylate-styrene copolymer (MS) light diffusing agent and benzotriazole ultraviolet absorber (UV); said substrate layer 1 It is integrated with one side layer 2 and the o...

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Abstract

The invention discloses a dispersing board and the manufacturing method applied to liquid crystal television back light assembly. The dispersing board is formed by squeezing and combining a base board, tow side layers, ant the base board layer is a cross blend layer using transparent methyl crylic acid methyl ester polymer or its copolymer as base materials and the light dispersant; the two layers are the cross blend layers using poly methyl crylic acid methyl ester or polycarbonate as the base materials. The producing method for the dispersing board: uses the plastic squeezer as the main producing device, stocking; heating and plasticizing; squeezing; post arranging. The light atomization rate and brightness of the dispersing board are excellent, the size is stable, and the lifespan is long.

Description

technical field [0001] The invention relates to a diffusion plate and a production method thereof, in particular to a diffusion plate used in a liquid crystal television backlight module and a production method thereof. Background technique [0002] The backlight module that provides light source for LCD TV mainly includes light source cold cathode lamp tube, diffusion plate and optical film. The function of the diffusion plate is mainly to atomize the line light source into a surface light source, distribute the light evenly and guide the scattering direction of the light, and increase the brightness. The technical requirements for the application of diffuser plates in industrial product LCD TVs should not only have good diffuse transmittance, diffuse reflectivity and haze, but also have excellent dimensional stability and good resistance to light emitted by cold cathode lamps. ability of ultraviolet light. [0003] Existing technology, such as the diffusion plate disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
Inventor 吴龙平顾仲琪
Owner 常州丰盛光电科技股份有限公司
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