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Diffusion chip and method of manufacture and backlight module group adopting the diffusion chip

A backlight module, diffuser technology, applied in optics, nonlinear optics, diffusing elements, etc., can solve the problems of high brightness, reduced brightness, increased brightness, etc., to achieve uniform lighting, improve light utilization, and reduce thickness. Effect

Inactive Publication Date: 2008-07-09
上海广电光电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But in fact, due to the luminous characteristics of the lamp tube, the brightness of the area close to the lamp tube will be high, and the brightness will gradually decrease as the distance from the lamp tube increases.
When approaching the next lamp tube, the brightness will increase again, which will cause uneven distribution of light and dark in the backlight, which will affect the picture quality
[0004] At present, diffusers or diffusers with low penetration rate are generally used to cover the bright band of the lamp tube, or the distance between the lamp tube and the diffuser is increased, which will cause a decrease in the utilization rate of light energy and damage the backlight module. Disadvantages of increased thickness

Method used

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  • Diffusion chip and method of manufacture and backlight module group adopting the diffusion chip
  • Diffusion chip and method of manufacture and backlight module group adopting the diffusion chip

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Embodiment Construction

[0019] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0020] Fig. 1 is a structural schematic diagram of a diffusion sheet of the present invention, as shown in the figure, the diffusion sheet includes a substrate 11 and a diffusion layer 12 coated on the substrate 11, and the diffusion layer 12 includes a first diffusion particle region 121 and a diffusion layer 12 coated on the substrate 11. The second diffusion particle region 122, the first diffusion particle region 121 and the second diffusion particle region 122 have different transmittances.

[0021] The substrate is preferably selected from polyethylene terephthalate (PET).

[0022] Diffusion particles can be organic transparent particles, such as acrylic resin, styrene resin, etc., with a diameter of about 1-20um, and the solvent can be colorless and transparent materials such as polyamide resin and epoxy resin. The weight of the diffusion particles r...

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Abstract

The invention discloses a diffuser sheet of backlight module. The diffuser sheet comprises a substrate and a diffusion layer applied on the substrate, wherein the diffusion layer includes a first diffusing particle region and a second diffusing particle region, and the first diffusing particle region and the second diffusing particle region have different penetration rates. The invention also discloses the manufacture method of the diffuser sheet and a backlight module adopting the diffuser sheet. The diffuser sheet of the invention can achieve uniform light emission of backlight source, improve the light utilization rate and reduce the thickness of the backlight module.

Description

technical field [0001] The invention relates to a liquid crystal display backlight module, in particular to a diffusion sheet of the liquid crystal display backlight module and a manufacturing method thereof. Background technique [0002] Liquid crystal display (LCD) uses the change of the electric field strength clamped on the liquid crystal molecules to change the orientation of the liquid crystal molecules to control the intensity of light transmission to display images. Generally speaking, a complete liquid crystal display panel must have a backlight module, a polarizer, a TFT (thin film transistor) lower substrate, a CF (color filter) upper substrate, and a liquid crystal molecule layer filled in a box composed of two substrates. The liquid crystal substrate itself cannot emit light, and needs to be provided by a backlight source. A backlight usually consists of a backplane, a light source, a diffuser, and various optical films. At present, backlight sources are gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/13357G02F1/1335
Inventor 李郑阳
Owner 上海广电光电子有限公司