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Glare-proof film, glare-proof polarizing sheet and image display device

An anti-glare polarizer and anti-glare film technology, which is applied in the direction of identification devices, polarizing elements, nonlinear optics, etc., can solve the problems of insufficient anti-glare performance, whitening of the display surface, and difficulty in obtaining it, so as to prevent visible Reduced performance, high anti-glare performance, and enhanced strength

Inactive Publication Date: 2009-07-01
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, such an anti-glare film manufactured by dispersing a filler has a problem in that the disposition or shape of the concavo-convex varies depending on the dispersion state or coating state of the filler in the resin solution, and thus it is difficult to obtain the desired anti-glare film. Concave and convex, sufficient anti-glare performance cannot be obtained in a film with low haze
In addition, when such a conventional anti-glare film is arranged on the surface of an image display device, there is also a problem that the entire display surface becomes white due to scattered light, and so-called bright spots (white ちやけ) in which the display is blurred are likely to occur.

Method used

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  • Glare-proof film, glare-proof polarizing sheet and image display device
  • Glare-proof film, glare-proof polarizing sheet and image display device
  • Glare-proof film, glare-proof polarizing sheet and image display device

Examples

Experimental program
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Effect test

Embodiment 1

[0106] (A) Preparation of polarizing film

[0107] A polyvinyl alcohol film with an average degree of polymerization of about 2400, a degree of saponification of 99.9 mol % or more, and a thickness of 75 μm was immersed in pure water at 30° C., and then immersed in iodine / potassium iodide / water at a mass ratio of 0.02 / 2 / 100 in aqueous solution. Thereafter, it was immersed in an aqueous solution having a mass ratio of potassium iodide / boric acid / water of 12 / 5 / 100 at 56.5°C. Next, after washing with 8° C. pure water, it was dried at 65° C. to obtain a polarizing film in which iodine was adsorbed and oriented on polyvinyl alcohol. Stretching is mainly carried out in the process of iodine dyeing and boric acid treatment, and the total stretching ratio is 5.3 times.

[0108] (B) Production of anti-glare film

[0109] An ultraviolet curable resin composition in which the following components were dissolved in ethyl acetate at a solid content concentration of 60% was prepared.

...

Embodiment 2 and comparative example 1

[0127] The parts by weight of the filler (porous silica particles, simply referred to as "silicon dioxide" in Table 1) dispersed in the coating liquid were changed as shown in Table 1, and the same procedure as in Example 1 was performed except that , making an anti-glare film, and evaluating the optical properties. Table 2 describes the evaluation results of optical properties.

Embodiment 3～5 and comparative example 2 and 3

[0129] Instead of porous silica particles, the filler dispersed in the coating solution was changed to spherical polystyrene particles (refractive index 1.59) with a weight average particle diameter of 3.0 μm, and the added weight parts and anti-glare layer thickness are shown in Table 1 Except having changed as shown, it carried out similarly to Example 1, the anti-glare film was produced, and the optical characteristic was evaluated. Table 2 describes the evaluation results of optical properties.

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Abstract

The present invention provides an antiglare film, an antiglare polarizing disc and an image display device. The aim of the invention is to provide poly(ethylene terephthalate) film which has excellent mechanical strength of film and low cost and provide the antiglare film representing excellent antiglare performance. The antiglare film according to the invention is formed with an antiglare layer on the poly(ethylene terephthalate) film, wherein the antiglare layer is provided with superfine concave-convex shape on the surface. When the total haze is set to H% and the transmission definition is set to Tc%, the following relationship (1) is satisfied: Tc< / = 8H...(1).

Description

technical field [0001] The present invention relates to an antiglare film using a polyethylene terephthalate film excellent in film mechanical strength and cost, an antiglare polarizing plate and an image display device using the antiglare film. Background technique [0002] Image display devices such as liquid crystal displays or plasma display panels, Brown tube (cathode ray tube: CRT) displays, organic electroluminescence (EL) displays, etc., have a significant impairment of visibility when external light is projected onto the display surface. Conventionally, in order to prevent such external light projection, in TVs and personal computers that value image quality, video cameras and digital cameras used outdoors where the external light is strong, mobile phones that use reflected light to display, etc., the surface of the image display device A film layer to prevent external light projection is arranged on the top. For this layer, anti-reflective processing technology th...

Claims

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Application Information

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IPC IPC(8): G02B1/10G02B5/30G02F1/1335G09F9/30
CPCB29C55/12B32B7/02B32B27/365G02B1/111G02B5/0226G02F1/133502
Inventor 古谷勉矢可部公彦
Owner SUMITOMO CHEM CO LTD
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