Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate

A technology of liquid crystal panels and polarizers, which is applied in the field of polarizers, can solve problems such as ripples in the display, and achieve excellent display quality and the effect of suppressing poor display

Inactive Publication Date: 2012-04-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As described in the aforementioned JPH11-295714-A, JP2008-262133-A, and JP2005-17355-A, liquid crystal display devices using polarizing plates having sheet members such as prism sheets often have moiré in their displays

Method used

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  • Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate
  • Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate
  • Polarizing plate, and liquid crystal panel and liquid crystal display device using said polarizing plate

Examples

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manufacture example 1

[0090] (Manufacturing example 1: Production of polarizing film)

[0091] After immersing 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 in pure water at 30°C, it is immersed in an iodine / potassium iodide / water weight ratio of 0.02 / 2 / 100 at 30°C. in aqueous solution. Then, it was immersed in the aqueous solution whose weight ratio of potassium iodide / boric acid / water was 12 / 5 / 100 at 56.5 degreeC. Next, after washing with 8° C. pure water, it was dried at 65° C. to obtain a polarizing film in which polyvinyl alcohol adsorbed iodine and iodine was oriented. Stretching is mainly carried out in the process of iodine dyeing and boric acid treatment, and the total stretching ratio is 5.3 times.

manufacture example 2

[0092] (Manufacturing Example 2: Preparation of UV Curable Adhesive)

[0093] 10.0 g of hydrogenated epoxy resin-trade name "EPIKOTEYX8000" produced by Japan Epoxy Resin Co., Ltd. (diglycidyl ether of nuclear hydrogenated bisphenol A, with an epoxy equivalent of about 205 g / equivalent), Nippon Soda Co., Ltd. 4.0 g of photocationic polymerization initiator-trade name "CI5102" manufactured by Nippon Soda Co., Ltd. and 1.0 g of photosensitizer-trade name "CS7001" manufactured by Nippon Soda Co., Ltd. were measured in a 100 ml disposable cup and mixed. Degassing, thereby preparing an ultraviolet curable adhesive.

manufacture example 3

[0094] (Manufacturing Example 3: Fabrication of Triangular Prism Sheet 1)

[0095] Molten polypropylene resin was applied to a mold designed in advance so that the pitch of the molded prisms was 50 μm and the apex angle of the prisms was 65°, and pressure was applied while heating. Next, it cooled to 60 degreeC immediately after peeling off from a mold, and the triangular prism sheet 1 which consists of polypropylene resin was obtained. Any triangular prism has the same shape as designed.

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Abstract

Disclosed is a polarizing plate provided with: a polarizing film (2) comprising a monoaxially-oriented polyvinyl alcohol resin film onto which iodine or a dichroic dye is absorbed and oriented; and a sheet member (3) that is layered on top of the polarizing film (2) with an adhesive layer (4) interposed therebetween and has a surface in the shape of a prism or lens. The sheet member (3) comprises a thermoplastic crystalline polymer and has internal haze due to said crystalline polymer. The level of internal haze in the sheet member (3) is between 3% and 60%. Also provided are a liquid crystal panel and a liquid crystal display device using the aforementioned polarizing plate.

Description

technical field [0001] The present invention relates to a polarizing plate, and more specifically, relates to a polarizing plate suitable for use as a rear-side polarizing plate disposed between a liquid crystal cell and a backlight of a liquid crystal display device. Furthermore, the present invention relates to a liquid crystal panel and a liquid crystal display device using the polarizing plate. Background technique [0002] Liquid crystal display devices are rapidly expanding applications as thin display devices used in liquid crystal televisions, liquid crystal monitors, personal computers, and the like. In particular, the LCD TV market is expanding significantly, and the demand for cost reduction is also very high. [0003] A common liquid crystal display device includes a backlight source formed by cold cathode tubes or LEDs, a light diffusion plate, one or more diffusion sheets, a light collection sheet, and a liquid crystal panel bonded with polarizers. In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B5/02G02F1/1335G02F1/13357
CPCG02F1/133504G02F1/133528G02B5/3033G02B5/045G02B3/0056
Inventor 森美穗室诚治金谷浩子金光昭佳
Owner SUMITOMO CHEM CO LTD
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