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Light diffusing layer, light diffusing film, and light diffusing adhesive sheet

A light diffusion and adhesive technology, applied in the direction of diffusion elements, optics, optical elements, etc., can solve the problem of low light transmission intensity in straight lines

Active Publication Date: 2004-12-01
TOMOEGAWA PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, it is not yet possible to obtain a linear light transmission intensity that is not so low and can also diffuse light into a narrow angle range

Method used

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  • Light diffusing layer, light diffusing film, and light diffusing adhesive sheet
  • Light diffusing layer, light diffusing film, and light diffusing adhesive sheet
  • Light diffusing layer, light diffusing film, and light diffusing adhesive sheet

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specific Embodiment approach

[0033] Hereinafter, the present invention will be described in further detail based on the embodiments, but the present invention is not limited to these embodiments.

Embodiment approach 1～7

[0035] The light-diffusing adhesive sheets of Embodiments 1 to 7 were produced by the following method. For 100 weight units, the refractive index is 1.47 and the specific gravity is 0.81g / cm 3 Acrylic adhesive (trade name: SK Dyne (dyne) H-5F, total solid content 30%, diluting solvent ethyl acetate, manufactured by Soken Chemical Co., Ltd.), to which 0.2 weight units of isocyanate Add various spherical fillers described in Embodiments 1 to 7 of Table 1 to the base paint of a crosslinking agent (trade name: D-90, manufactured by Soken Chemical Co., Ltd.), and stir in a mixing mixer for 30 minutes to disperse the spherical fillers. , Prepare 7 types of paints for the light-diffusing layer. Each prepared paint was coated on a release polyethylene terephthalate film (trade name: 38PF, manufactured by lintec) with a film thickness of 38 μm using a comma knife coater, and dried to reach the specified thickness. Thickness, after drying it to form a light-diffusing layer, laminatin...

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Abstract

A light diffusing layer has a resin matrix and spherical fillers having different refractive index from the resin matrix, and a thickness of the light diffusing layer T (mum), a difference of refractive index Deltan between the resin matrix and the spherical fillers, and a volume content Cv (%) of the spherical fillers to the light diffusing layer satisfy the formula 20<=TxDeltanxCv<=75. Furthermore, an adhesive can be contained in the resin matrix.

Description

technical field [0001] The present invention relates to a suitable light-diffusing layer, light-diffusing film, and light-diffusing adhesive sheet used in lighting devices such as backlights of liquid crystal display devices. Background technique [0002] A liquid crystal display device uses a large number of various media other than a liquid crystal cell to control reflection, transmission, diffusion, refraction, polarization, and the like of light. Here, the representative of the light-diffusing medium is the so-called diffusing film provided on the light guide sheet. In an edge-light backlight system, in order to make the light from the light source on the end surface of the light guide sheet incident, generally, most of the light emitted from the light guide sheet deviates from the normal direction of the light guide sheet. The opposite direction of the light source emerges obliquely, and the reflective dots printed on the light guide sheet can be seen as they are. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/1335
CPCG02B5/0226G02B5/0242G02B5/0278Y02E60/10H01M50/213
Inventor 村田亮东健策
Owner TOMOEGAWA PAPER CO LTD