Optical film, polarizing plate and image display apparatus

一种光学膜、透光性的技术，应用在光学膜领域，能够解决不充分、光学膜降低反射率、黑稠密性恶化等问题

Inactive Publication Date: 2010-03-31
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these optical films proposed so far do not sufficiently reduce the reflectance
In addition, since currently used antiglare films have fine unevenness on the surface, they have a problem that light scattering from the surface deteriorates black denseness compared to transparent films with a flat surface

Method used

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  • Optical film, polarizing plate and image display apparatus
  • Optical film, polarizing plate and image display apparatus
  • Optical film, polarizing plate and image display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0383] (preparation of sol "a")

[0384] In a 1,000-ml reaction vessel equipped with a thermometer, a nitrogen inlet tube, and a dropping funnel, add 187 g (0.80 mol) of acryloxypropyltrimethoxysilane, 27.2 g (0.20 mol) of methyltrimethoxy Silane, 320 g (10 mol) of methanol and 0.06 g (0.001 mol) of KF were gradually added dropwise with 15.1 g (0.86 mol) of water under stirring at room temperature. After the dropwise addition was completed, the resulting reaction mixture was stirred at room temperature for 3 hours, and then heated and stirred under reflux of methanol for 2 hours. Thereafter, low boiling point components in the reaction system were distilled off under reduced pressure, and further filtered. In this way, 120 g of sol "a" were obtained. The obtained product was subjected to GPC measurement, and it was found that the weight average molecular weight of the product was 1,500, and the ratio of components having a molecular weight of 1,000 to 20,000 in all component...

Embodiment 2

[0518] (Coating solution A for preparing the middle refractive index layer)

[0519] To 10.0 mass parts containing ZrO 2 The chemical reagent (DeSolite Z7404 [refractive index: 1.72, solid matter concentration: 60 mass %, content of zirconia particle: 70 mass % (calculated by solid matter) of zirconia particle used for the formation of hard coating of particle, the average particle diameter of zirconia particle: about 20 nm, solvent composition: MIBK / MEK=9 / 1, manufactured by JSR Corporation]), add 3.0 parts by mass of a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA), 0.1 parts by mass of a photopolymerization initiator (IRGACURE 184, manufactured by Ciba Specialty Chemicals Inc.), 0.1 parts by mass of SP-13, and 86.9 parts by mass of methyl isobutyl ketone, and stirred. After sufficiently stirring, the resulting mixture was filtered through a polypropylene filter with a pore diameter of 0.4 μm to prepare a coating liquid A for a middle re...

Embodiment 3

[0550] A coating liquid B having the following composition was prepared for forming a low-refractive index layer.

[0551] Composition of Coating Solution B for Low Refractive Index Layer:

[0552] DPHA 1.0 parts by mass

[0553] MEK-ST-L 26.4 parts by mass

[0554] RMS-033 0.4 parts by mass

[0555] IRGACURE 907 0.3 parts by mass

[0556] M-1 1.9 parts by mass

[0557] MEK 170.0 parts by mass

[0558] MEK-ST-L: Colloidal silica with an average particle size of about 50 nm, manufactured by NISSAN CHEMICAL INDUSTRIES, LTD.

[0559] Samples 24 and 25 shown in Table 8 were prepared in the same manner as in Example 2, except that a low-refractive index layer was formed by coating the above composition.

[0560] Table 8

[0561]

[0562] (Evaluation of Optical Films)

[0563] Various performance evaluations were performed on each optical film according to the same method as in Example 1. The results are shown in Table 9. At this time, the black denseness (display perfo...

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Abstract

An optical film, is provided, the optical film including: a support; and at least one antiglare layer having a surface that has asperities, wherein the at least one antiglare layer contains at least one kind of light transmitting particles including first light transmitting particles in an amount of 0.01 to 1 mass % based on a total solid content in the antiglare layer, the first light transmitting particles have an average particle size that is 0.1 to 4.0 [mu]m greater than an average thickness of the antiglare layer, and a region [theta](0.5) in which slope angles [theta] of the asperities of the surface of the antiglare layer lie within a range of 0 DEG <[theta]<0.5 DEG constitutes 40% to 98% of the surface of the antiglare layer.

Description

technical field [0001] The present invention relates to an optical film, a polarizer using the optical film, and an image display device using the optical film or the polarizer. Background technique [0002] Optical films, especially anti-reflection films, are generally provided on the outermost surfaces of display devices such as cathode ray tube (CRT) display devices, plasma display panels (PDP), electroluminescence displays (ELD), and liquid crystal display devices (LCD). Surface to prevent contrast reduction caused by external light reflection from the display surface and ambient light reflection in the image display device. Therefore, the anti-reflection film requires not only high anti-reflection ability, but also high transmittance, high physical strength (for example, high scratch resistance), chemical resistance and weather resistance (including moisture resistance, heat resistance and light resistance) sex). [0003] The antireflection film prevents reflection by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02F1/133528G02B5/0242G02B5/0294G02B1/111G02B5/0221G02F1/133502G02B5/0278
Inventor 胁阪大树铃木贵登朝仓彻也
Owner FUJIFILM CORP
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