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Antiglare film, manufacturing method thereof, polarizing plate, image display device, and touch panel member

An anti-glare film and anti-glare layer technology, applied in polarizing elements, optical elements, diffusing elements, etc., can solve the problems of visibility deterioration, darkening of the screen of the display device, and reduction of contrast ratio.

Active Publication Date: 2015-12-02
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, manufacturing method thereof, polarizing plate, image display device, and touch panel member
  • Antiglare film, manufacturing method thereof, polarizing plate, image display device, and touch panel member
  • Antiglare film, manufacturing method thereof, polarizing plate, image display device, and touch panel member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0385]

[0386] (Preparation of silica dispersion)

[0387] AEROSILR812 (manufactured by AEROSIL Japan Co., Ltd., the average particle size of primary particles is 7nm)

[0388] 10 parts by mass

[0389] 90 parts by mass of ethanol

[0390] After mixing the above materials with a dissolver for 30 minutes, they were dispersed with a high pressure homogenizer (Manton Gaulin). While stirring, 88 parts by mass of dichloromethane was put into the silica dispersion liquid, and stirred and mixed with a dissolver for 30 minutes to prepare a silica dispersion dilution liquid. Filtration was performed with a particulate dispersion diluent filter (Advantec Toyo Co., Ltd.: Polypropylene winding filter (POLYPROPYLENEWOUND CARTRIDGEFILTER) TCW-PPS-1N).

[0391]

[0392] (Glue composition)

[0393] 90 parts by mass of cellulose triacetate

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

[0395] 10 parts by mass of aromatic terminal ester plasticizer (2-4)

[0396] 2.5 parts by mass of Ti...

Embodiment 2

[0595]

[0596] The following transparent hard coat coating composition 1 filtered with a polypropylene filter with a pore size of 0.4 μm was coated on the base material film 1 prepared in Example 1 using a microgravure coater, and was dried at a constant speed. After drying at a temperature of 80°C and a deceleration drying zone temperature of 80°C, while purging with nitrogen to achieve an atmosphere with an oxygen concentration of 1.0% by volume or less, an ultraviolet lamp is used to irradiate the part with an illuminance of 100mW / cm 2 , Irradiation 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 transparent hard coating layer was formed, it was rolled into a roll to produce a transparent hard coating film 1. The total haze of the clear hard coating film 1 was measured using a measuring machine (NDH2000) manufactured by Nippon Denshoku Industries Co., Ltd., and the result was 0.3%, which was ver...

Embodiment 3

[0639]

[0640] In the production of the anti-glare film 1, the anti-glare layer coating layer composition 1 was applied and provided on both sides, and the double-sided anti-glare film 1 was produced in the same manner except that the anti-glare layer coating layer composition 1 was applied.

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

[0642]

[0643] In the production of the anti-glare films 2 to 11, an anti-glare layer was applied on both sides in the same manner as the double-sided anti-glare film 1, except that the double-sided anti-glare films 2 to 11 were produced in the same manner.

[0644] Next, in the same way as the production of the anti-glare film 1 with a conductive film, an anti-glare layer was coated on both sides, and then a sputtering method was used to set the tr...

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Abstract

The invention provides an antiglare film, which is an antiglare film with an antiglare layer on a base material film, wherein the arithmetic mean roughness Ra (nm) of the surface of the antiglare layer is related to that defined by the following definition formula: The length Ic (μm) satisfies the following relational expression (1). Relational formula (1): 0≤Ic≤21-8×exp((215-Ra) / 40)-13×exp((215-Ra) / 400); definition: correlation length Ic=self-multiplied mean square root roughness Degree Rq (μm) / quadratic mean square root gradient Δq×21 / 2.

Description

Technical field [0001] The invention relates to an anti-glare film and a manufacturing method thereof. In addition, the present invention relates to a polarizing plate, an image display device, and a member for a touch panel including the anti-glare film. Background technique [0002] In an image display device such as a liquid crystal display device, an anti-glare layer is generally provided on the surface of the image display unit in order to prevent the ghosting phenomenon caused by the illumination light of fluorescent lamps, the sun, or the like, or external light reflecting on the screen and hinder visibility. [0003] In recent years, if an anti-glare film having an anti-glare layer is used as it is on a high-definition, colorful image display device, there has been a problem of moiré on the display screen. [0004] A technique for improving the problem of the moiré is disclosed in Patent Documents 1 and 2, for example. The technology is a technology that reduces the occurre...

Claims

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Application Information

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