Light-scattering film, method of manufacturing same, light-scattering polarizing plate, and liquid-crystal display device

A technology of liquid crystal display device and light diffusion film, which is applied in the direction of polarizing elements, lighting devices, chemical instruments and methods, etc., to achieve the effect of good front brightness and high dot concealment

Active Publication Date: 2013-04-03
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the diffusion sheets described in Patent Documents 1 and 2 have a special structure, and are not yet advantageous in terms of production efficiency and production cost.
In addition, the method of adjusting the whiteness of the point mentioned in Patent Document 3 to satisfy a specific conditional formula is not beneficial in terms of production efficiency and production cost.

Method used

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  • Light-scattering film, method of manufacturing same, light-scattering polarizing plate, and liquid-crystal display device
  • Light-scattering film, method of manufacturing same, light-scattering polarizing plate, and liquid-crystal display device
  • Light-scattering film, method of manufacturing same, light-scattering polarizing plate, and liquid-crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] (1) Production of mirror metal rollers

[0201] The surface of an iron roll (STKM13A specified by JIS) with a diameter of 200 mm was subjected to industrial chrome plating, and then the surface was mirror-polished to produce a mirror-finished metal roll. The Vickers hardness of the chrome-plated surface of the obtained mirror-finished metal roller was 1,000. In addition, Vickers hardness was measured based on JISZ2244 using the ultrasonic hardness meter MIC10 (made by Krautkramer).

[0202] (2) Production of light diffusion film

[0203] Mix 60 parts by weight of pentaerythritol triacrylate and 40 parts by weight of polyfunctional urethanized acrylate (reaction product of 1,6-hexamethylene diisocyanate and pentaerythritol triacrylate) in the propylene glycol monomethyl ether solution to adjust the solid content concentration 60% by weight to obtain an ultraviolet curable resin composition. Moreover, the refractive index of the hardened|cured material which removed pr...

Embodiment 2～6

[0207] A light-diffusing film was produced in the same manner as in Example 1 except that the thickness of the light-diffusing layer and the weight-average particle diameter of the translucent fine particles, the standard deviation of the particle diameter, and the addition amount were as described in Table 1.

Embodiment 7

[0209] (1) Production of metal rolls for embossing

[0210] A roll having a diameter of 200 mm of an iron roll (STKM13A specified by JIS) on the surface of which Ballard copper plating was provided was prepared. Ballard copper plating consists of copper plating / thin silver plating / surface copper plating, the thickness of the entire plating is about 200μm. Mirror-polish the surface of the copper coating, and then use a sandblasting device (manufactured by Fuji Manufacturing Co., Ltd.), with a sandblasting pressure of 0.05MPa (gauge pressure, the same below), and a particle usage of 16g / cm 2 (per 1cm of roll 2 The amount of surface area used, the same below) was used to form irregularities on the surface of the polished surface blasted zirconia beads TZ-B125 (manufactured by Tosoh Corporation, average particle diameter: 125 μm). Use a sandblasting device (manufactured by Fuji Manufacturing Co., Ltd.), with a blasting pressure of 0.1MPa and an amount of fine particles of 4g / cm ...

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Abstract

Provided is a light-scattering film that is positioned at the front surface side of a liquid-crystal cell, which displays desirable front-facing brightness, and which is capable of obtaining a liquid-crystal display device wherein dots are not visible. An embodiment of the present invention is a light-scattering film positioned at the front surface side of a front surface polarizing plate 706 in a liquid-crystal display device comprising: an edge-light planar light source 702, further comprising a light guiding plate 721 and a light source 722 that is positioned laterally to the light guiding plate 721; a liquid crystal cell 701 that is positioned at the front surface side of the edge light planar light source 702; and the front surface polarizing plate 706, which is positioned at the front surface side of the liquid crystal cell 701. The light-scattering film comprises: a substrate film 101; and a light scattering layer 102 that is stacked on the substrate film 101, further comprising: a translucent resin 103, and translucent minute particles 104 that are dispersed in the translucent resin 103. The sum of the transmitted clarity that is measured via four types of optical probes, the widths of the dark parts and the light parts thereof being 0.125mm, 0.5mm, 1.0mm, and 2.0mm, is 50% - 300%.

Description

technical field [0001] The present invention relates to a light-diffusing film and a manufacturing method thereof. Moreover, this invention relates to the light-diffusing polarizing plate and liquid crystal display device using this light-diffusion film. Background technique [0002] In recent years, the use of liquid crystal display devices in mobile phones, computer monitors, televisions, liquid crystal projectors, etc. has rapidly developed. Improved low power consumption and thinner. A general liquid crystal display device comprises a direct light type or an edge light (edge ​​light) type surface light source, a diffuser, and a liquid crystal panel composed of a rear side polarizing plate, a liquid crystal cell, and a front (visible) side polarizing plate, which has the above-mentioned order of disposing these The structure of the component. The diffusion sheet placed on the surface light source is an optical member that uniformly diffuses light from the surface light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02B32B27/20F21V3/00F21V3/04G02B5/30G02F1/1335G02F1/13357
CPCG02F1/133504G02F1/133528G02F2001/133562G02B5/0242G02F1/133562
Inventor 羽场康弘金玉馨宫本知典金光昭佳
Owner SUMITOMO CHEM CO LTD
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