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Light diffusion sheet for a display device

A technology of light diffuser and display device, applied in optics, optical components, nonlinear optics, etc., can solve problems such as display performance distortion of LCD panel

Active Publication Date: 2009-09-09
HB TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More specifically, conventional base resins such as methacrylic and styrene resins used to form transparent base films in conventional light diffusion sheets may be deformed due to excessive heat generated by BLU light sources, distorting the display performance of LCD panels

Method used

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  • Light diffusion sheet for a display device
  • Light diffusion sheet for a display device
  • Light diffusion sheet for a display device

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Production of base layer: A methacrylate-styrene (MS) copolymer and a methyl methacrylate-styrene (MMS) copolymer were mixed to form 100 parts by weight of a base resin mixture. Silicone resin particles having an average diameter of 2 μm in an amount of 2 ppwb (obtained from GE Toshiba Silicone Co., Ltd.) and acrylic crosslinked particles having an average diameter of 8 μm in an amount of 2 ppwb (obtained from Sekisui Chemical Co., Ltd.) were added into the base resin mixture to form the base layer composition.

[0049] Production of coating: MS copolymer was prepared to form 100 parts by weight of base coating resin. Acrylic acid crosslinked particles (obtained from Sekisui Chemical Co., Ltd) with an average diameter of 20 μm in an amount of 10 ppwb, an antistatic agent in an amount of 1 ppwb, and a light stabilizer in an amount of 1 ppwb were added to the base coat resin to form a coating combination.

[0050]Production of multi-layer light diffusion sheet: each bas...

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Abstract

A light diffusion plate for an LCD(Liquid Crystal Display) back light unit is provided to improve heat resistance and light diffusion property in correspondence to large screen size of an LCD panel as reducing a fabrication cost. A base film layer(200) includes a siloxane light diffuser 0.1-1.0 wt% with average diameter of 1-20 mum and an acrylic light diffuser 0.1-10wt% with average diameter of 1-20 mum, among a basic resin 100 wt% mixed with a methacrylic acid-styrene copolymer and a methacrylic acid methyl-styrene copolymer. A coating layer(210) is stacked on one plane or both planes of the base film layer, and includes an arylic light diffuser 0.1-30 wt% with average diameter of 1-50 mum, a violet ray absorber 0.01-2 wt%, and an anti-static agent 0.001-10 wt%, for a methacrylic acid methyl-styrene copolymer 100 wt%.

Description

technical field [0001] Embodiments of the present invention relate to a light-diffusing sheet for a display device. More specifically, embodiments of the present invention relate to a light-diffusing sheet for a liquid crystal display having improved light resistance, optical efficiency, and diffusivity. Background technique [0002] In general, a liquid crystal display (LCD) refers to a flat panel display capable of controlling the emission by an external light source, namely a backlight unit (BLU), by applying an electric field to liquid crystals between two substrates and controlling the strength of the electric field The amount of light on the substrate displays an image. Therefore, a conventional LCD may have BLUs on its rear surface. [0003] Conventional BLUs can be edge BLUs, ie BLUs used in thin monitors such as notebook or desktop computer monitors, or direct-lit BLUs, ie BLUs used in larger devices such as LCD TVs. Conventional direct-lit BLUs may include a lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02G02B1/04G02B1/10G02F1/13357
CPCC08G77/04C08K5/0008C08L33/12G02B5/0215G02B5/0226G02B5/0242
Inventor 吴泳赵昌熙崔乘晚
Owner HB TECH CO LTD
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