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Circularly polarizing plate and liquid crystal display

A liquid crystal display, circular polarizer technology, applied in polarizing elements, instruments, optics, etc., can solve problems such as low polarization performance, and achieve the effects of suppressing shrinkage, excellent polarization ability, and improving productivity

Inactive Publication Date: 2008-02-13
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as is generally known, orientation by rubbing is only effective on the film surface up to the nanometer scale, and this technique cannot adequately align polarizing elements containing iodine or dichroic dyes.
As a result, its drawback is to obtain low polarization performance

Method used

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  • Circularly polarizing plate and liquid crystal display
  • Circularly polarizing plate and liquid crystal display
  • Circularly polarizing plate and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0372] [I] Preparation of λ / 4 Plates

[0373] 100g of 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.12,5.17,10]dodec-3-ene, 60g of 1,2-dimethoxyethane, 240g of cyclohex Alkane and 3.4 ml of a 0.96 mol / l solution of diethylammonium chloride in toluene were added to an autoclave with an internal volume of 1 liter. Separately, 20 ml of a 0.05 mol / l solution of tungsten hexachloride in 1,2-dimethoxyethane and 10 ml of a 0.1 mol / l solution of paraldehyde in 1,2-dimethoxyethane Mix in a flask. 4.9 ml of this mixture was added to the mixture in the above autoclave. After the autoclave was sealed, the mixture was heated to 80°C with stirring for 3 hours. To the polymer solution thus obtained, a mixed solvent of 1,2-dimethoxyethane and cyclohexane (2 / 8 by weight) was added to adjust the polymer / solvent ratio to 1 / 10 (by weight) , and then 20 g of triethanolamine was added thereto and stirred for 10 minutes.

[0374] 500 g of methanol was added to the polymer solution, stirred for 30 ...

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Abstract

A circularly polarizing plate in a continuous length comprising: a polarizing film having an absorption axis neither parallel nor perpendicular to the lengthwise direction, at least one optical film provided at: at least one surface of the polarizing film; and an adhesive layer provided at an outside of at least one of the polarizing film and the optical film, wherein an angle between the absorption axis and the slow axis of at least one of the optical films is no less than 10 degrees and less than 90 degrees, and the formulation (I) and (II) defined in the specification are satisfied.

Description

technical field [0001] The present invention relates to a circular polarizing plate which has excellent durability and productivity and which can convert any incident light in the visible region into circularly polarized light, and also relates to a high-display performance film using this polarizing plate LCD Monitor. Background technique [0002] With the spread of liquid crystal displays (hereinafter referred to as "LCDs"), the demand for polarizing plates has increased abruptly. The polarizer is usually laminated with a protective film, a surface protective film, a phase retarder (λ / 4 plate, λ / 2 plate) or the like on both sides or one side of a polarizing film (film) with polarizing properties. made of optical films. Also, an adhesive layer is generally provided on at least one outer surface of the optical film and the polarizing film so that the polarizing plate is adhered to other elements such as a liquid crystal display through the adhesive layer. [0003] As a ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B29C55/00G02F1/1335G02F1/13363
Inventor 田口庆一北小路裕宗白土健太郎
Owner FUJIFILM CORP