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Antiglare film, method for producing same, polarizing plate, image display device, member for touch panel

A manufacturing method and technology of an anti-glare film, applied in polarizing elements, optical elements, diffusing elements, etc., can solve problems such as deterioration of visibility, darkening of the screen of a display device, and reduction of contrast

Active Publication Date: 2014-02-12
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the problem of moire fringes caused by this prism sheet, the anti-glare films described in the above-mentioned patent documents 1 and 2 were used on the rear polarizing plate. As a result, although the occurrence of moiré fringes was reduced, the occurrence of moiré fringes decreased the front brightness. The problem
If the front luminance is lowered, the screen of the liquid crystal display device becomes darker, and there is a problem that the visibility deteriorates due to a lowered contrast ratio.

Method used

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  • Antiglare film, method for producing same, polarizing plate, image display device, member for touch panel
  • Antiglare film, method for producing same, polarizing plate, image display device, member for touch panel
  • Antiglare film, method for producing same, polarizing plate, image display device, member for touch panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0385]

[0386] (Preparation of silica dispersion)

[0387] AEROSIL R812 (manufactured by Japan AEROSIL Co., Ltd., the average particle diameter of primary particles is 7nm)

[0388] 10 parts by mass

[0389] 90 parts by mass of ethanol

[0390] The above materials were stirred and mixed with a dissolver for 30 minutes, and then dispersed with a high-pressure homogenizer (Manton Gaulin). While stirring, 88 parts by mass of methylene chloride was added to the silica dispersion, and stirred and mixed in a dissolver for 30 minutes to prepare a silica dispersion dilution. Filtration was performed with a fine particle dispersion diluent filter (Advantec Toyo Co., Ltd.: POLYPROPYLENE WOUND CARTRIDGE FILTER) TCW-PPS-1N.

[0391]

[0392] (mucilage composition)

[0393] 90 parts by mass of cellulose triacetate

[0394] (Mn=148000, Mw=310000 acetyl substitution degree 2.92)

[0395] Aromatic terminal ester plasticizer (2-4) 10 pa...

Embodiment 2

[0595]

[0596] Using a micro-gravure coater, apply the following transparent hard coat coating composition 1 filtered through a polypropylene filter with a pore size of 0.4 μm on the base material film 1 produced in Example 1, and dry it in the constant-rate drying section. After drying at a temperature of 80°C and a deceleration drying zone temperature of 80°C, nitrogen purging is performed to obtain an atmosphere with an oxygen concentration of 1.0% by volume or less, while an ultraviolet lamp is used with an illuminance of 100mW / cm in the irradiated part 2 , irradiation dose 0.25J / cm 2 The coating layer was cured to form a transparent hard coat layer with a dry film thickness of 5 μm.

[0597] After the clear hard coat layer was formed, it was rolled into a roll to produce the clear hard coat film 1 . When the total haze of the clear hard coat film 1 was measured using a measuring machine (NDH2000) manufactured by Nippon Denshoku Industries Co., Ltd., it was 0.3%, and t...

Embodiment 3

[0639]

[0640] In preparation of the anti-glare film 1, the double-sided anti-glare film 1 was produced similarly except having provided the anti-glare layer coating layer composition 1 on both surfaces.

[0641] Next, a transparent conductive film of indium tin oxide (ITO) with a surface resistivity of about 200Ω was deposited on one side of the anti-glare layer by sputtering to produce Figure 7 Anti-glare film 1 with conductive film shown.

[0642]

[0643] In preparation of the anti-glare films 2-11, the double-sided anti-glare films 2-11 were produced similarly except having provided the anti-glare layer on both surfaces in the same manner as the double-sided anti-glare film 1.

[0644] Next, in the same manner as the preparation of the anti-glare film 1 with a conductive film, the anti-glare layer is coated on both sides, and the transparent conductive layer of ITO with a surface resistivity of about 200Ω is provided on one side of the anti-glare layer by sputtering...

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Abstract

One embodiment of the present invention is an antiglare film having an antiglare film disposed on top of a substrate film, the antiglare film being characterized in that the arithmetic average roughness Ra (nm) of the surface of the antiglare layer and the correlation length Ic (µm) as defined by the following definitional equation satisfy the following relational equation (1). Relational equation (1): 0 = Ic = 21-8×exp((215-Ra) / 40)-13×exp((215-Ra) / 400) Definitional equation: Correlation length Ic = root mean square roughness Rq (µm) / root mean square gradient ?q × 21 / 2

Description

technical field [0001] The present invention relates to an anti-glare film and a manufacturing method thereof. Moreover, this invention relates to the polarizing plate provided with this antiglare film, an image display device, and the member for touch panels. Background technique [0002] In an image display device such as a liquid crystal display device, an anti-glare layer is usually provided on the surface of the image display part in order to prevent the ghosting phenomenon caused by illumination light such as fluorescent lamps, the sun, or external light reflecting on the screen from hindering visibility. [0003] In recent years, when an anti-glare film having an anti-glare layer is used as it is in a high-definition and colored image display device, a problem arises that moiré fringes are generated on the display screen. [0004] Techniques for improving the problem of moire fringes are disclosed in Patent Documents 1 and 2, for example. This technique is a techniq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B5/30G02F1/1335
CPCG02B5/0221G02B5/30G02F1/1335
Inventor 小野俊哉冈野贤
Owner KONICA MINOLTA INC
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