Light diffusing agent, light diffusing sheet, and nonglare sheet

A technology of light diffusion and refractive index, applied in the directions of diffusing elements, optics, optical elements, etc., can solve the problems of light loss, transparency and image resolution reduction

Inactive Publication Date: 2005-02-09
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in such a light-diffusing sheet, when the amount of the diffuser used is increased in order to obtain a large viewing angle in a transmissive projection screen device, a problem of a significant loss of light quantity or a decrease in transparency and image resolution often occurs

Method used

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  • Light diffusing agent, light diffusing sheet, and nonglare sheet
  • Light diffusing agent, light diffusing sheet, and nonglare sheet
  • Light diffusing agent, light diffusing sheet, and nonglare sheet

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Abstract

Provided is a light diffusion sheet that has high diffusing efficiency and can obtain an excellent image bright with high contrast without dull colors and blur by reducing the unnecessary scattered light, and can realize a high quality image. This is a light diffusion agent to be used by dispersing in a transparent base material, consists of particles and the skin layers covering them, and satisfies the conditional equations (I) and (II). Conditional equation (I): N1 G02B 5 / 02 2 10 2 2004 / 6 / 28 1576901 2005 / 2 / 9 1289924 2006 / 12 / 13 2006 / 12 / 13 2006 / 12 / 13 Dai Nippon Printing Co., Ltd. Japan Honda Makoto gong haijun zhang zhicheng 72001 The Company Ltd. of the Chinese Patent Agency (Hong Kong) Zi Building 22, Yingjun Centre, No.23, Gangwan Road, Hong Kong Wanzi Japan 2003 / 6 / 27 185322 / 03

Description

technical field The present invention relates to a light diffusing agent, a light diffusing sheet and an antiglare sheet in which the light diffusing agent is dispersed. Background technique A light-diffusing sheet in which a diffusing agent such as silica, glass or alumina is dispersed in a transparent or translucent thermoplastic resin base is known for use in transmissive projection screens, lighting and the like. The above-mentioned light-diffusing sheet is widely used in practical applications due to its ease of manufacture and good cost-effectiveness. However, in such light-diffusing sheets, when the amount of the diffuser used is increased in order to obtain a large viewing angle in a transmissive projection screen device, a problem of a significant loss of light quantity or a decrease in transparency and image resolution often occurs . Japanese Patent Unexamined Publication No. 120702 / 1990 proposes a means for solving the above-mentioned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/02G02B5/04G02B27/02G03B21/56G03B21/62G03B21/625
CPCG03B21/62G02B5/0215G02B5/0278Y10T428/2438Y10T428/2991G02B5/0226G02B1/111G02B3/08
Inventor 本田诚
Owner DAI NIPPON PRINTING CO LTD
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