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Optical film, optical compensation film, polarization sheet and liquid crystal device using same

A liquid crystal display device, optical film technology, applied in optics, polarizing elements, optical elements, etc., can solve problems such as not taking into account

Inactive Publication Date: 2007-02-21
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these methods only reduce light leakage for light in a certain wavelength range (for example, green light at about 550nm), but do not take into account the light leakage for light in other wavelength ranges (for example, blue light at about 450nm and red light at about 650nm).

Method used

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  • Optical film, optical compensation film, polarization sheet and liquid crystal device using same
  • Optical film, optical compensation film, polarization sheet and liquid crystal device using same
  • Optical film, optical compensation film, polarization sheet and liquid crystal device using same

Examples

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preparation example Construction

[0548] As the production method of the optical film of the present invention, a known method of forming a film can be employed. The raw material may be heated and the molten product formed into a film; or the raw material may be dissolved in a solvent and the solution formed into a film.

[0549] [Method for forming thin film from molten product]

[0550] The optical film of the present invention can be produced by a method of forming a film from a molten product. Raw materials including base polymers and additives may be heated and melted, and the melted product may be formed into a film by extrusion molding. Alternatively, the material can be sandwiched between two plates and subjected to extrusion to form a film.

[0551]There is no particular limitation on the heat-melting temperature as long as the raw polycarbonate copolymer or mixture can be melted uniformly at that temperature. Specifically, the raw material is heated to or above its melting or softening point. In ...

Embodiment 1

[0609] An aqueous solution of sodium hydroxide and ion-exchanged water was charged into a reactor equipped with a stirrer, a thermometer and a reflux condenser, and the monomers (E) and (F ) is dissolved therein, and then a small amount of bisulfite is added thereto. Then, dichloromethane was added, and 20° C. phosgene was blown thereinto for about 60 minutes. Thereto was further added p-tert-butylphenol for emulsification, then triethylamine was added and the mixture was stirred at 30° C. for about 3 hours to complete the reaction. After the reaction was completed, the organic phase was separated, and methylene chloride was distilled off, thereby obtaining a polycarbonate copolymer. The proportions of the components of the final copolymer are almost the same as the proportions of the charged monomers.

[0610] 3 parts of the following discotic compounds were dissolved in methylene chloride per 100 parts by weight of the copolymer to prepare a coating liquid solution contain...

Embodiment 2

[0617] The same coating liquid solution as used in Example 1 was used. This coating liquid solution was continuously cast onto a stainless steel belt through a die, and then peeled off from the belt when the residual solvent amount was 20% by weight, and then dried in a drying zone at 200° C. between roller sets with different rotation speeds. , free uniaxial stretching was carried out in the longitudinal direction at a stretching ratio of 1.4 times the initial stretching ratio. In addition, the stretched film was passed through a drying zone to reduce the amount of residual solvent to 1% by weight or less, thereby obtaining an optical film having properties shown in Table 1.

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Abstract

Disclosed are the optical film represented by inequalities (1) to (4) and contains a specified kind of polycarbonate copolymer with a specified copolymerization ratio and / or a blend body containing the polycarbonate copolymer, the optical compensating film using the same, wherein (1) 0.1 G02B 1 / 00 G02F 1 / 13363 G02B 5 / 30 9 79 6 2006 / 8 / 17 1916666 2007 / 2 / 21 000000000 Fuji Photo Film Co., Ltd. Japan Nakayama Moto Ohashi Yusuke yu hui 72002 NTD Patent & Trademark Agency Ltd. Units 1805-6, 18th Floor, Greenfield Tower, Concordia Plaza, No.1 Science Museum Road, Tsimshatsui, east, Kowloon, Hong Kong 100045 Japan 2005 / 8 / 17 236856 / 2005

Description

technical field [0001] The present invention relates to an optical film, an optical compensation film, a polarizing plate and a liquid crystal display device using them. Background technique [0002] Liquid crystal display devices are widely used in personal computers, mobile device monitors, and televisions due to their various advantages such as their low voltage and low power consumption and high possibility of size and shape reduction. Although various modes depending on how the liquid crystal molecules in the liquid crystal cell are aligned have been proposed for such a liquid crystal display device, the main mode so far has been the TN mode in which the liquid crystal molecules are in an alignment state whose alignment varies from The inferior matrix is ​​twisted approximately 90 degrees to the superior matrix. [0003] Generally, a liquid crystal display device is composed of a liquid crystal element, an optical compensation film, and a polarizer....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00G02F1/13363G02B5/30
CPCY10T428/1036G02F2202/40Y10T428/105C08J2369/00Y10T428/31507G02F2413/04Y10T428/10G02F1/13363C08J5/18G02F2001/133633C09K2323/035C09K2323/03C09K2323/00G02F1/133633
Inventor 中山元大桥祐介
Owner FUJIFILM CORP
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