Mixed resin, retardation film and a liquid-crystal display device comprising the same

A technology of liquid crystal display device and retardation film, which is applied in the direction of instruments, optics, optical components, etc., can solve the problems of non-perpendicular optical axes and light leakage, and achieve low photoelastic coefficient, excellent heat resistance, and excellent retardation realization Effect

Active Publication Date: 2017-07-11
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, light does not pass through the front faces of the two polarizers that are perpendicular to each other, but if the angle is tilted, the optical axes of the two polarizers are not perpendicular to each other, and light leakage occurs

Method used

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  • Mixed resin, retardation film and a liquid-crystal display device comprising the same

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Embodiment 1

[0071] A resin was prepared by using 90 parts by weight of a copolymer of methyl methacrylate (80 parts by weight) and cyclohexyl methacrylate (20 parts by weight) and 10 parts by weight of polycarbonate. The glass transition temperature and molecular weight of the prepared resin were measured, and as a result, a resin having a glass transition temperature of 122° C. and a molecular weight of 110,000 was obtained. A film was produced from the resin using a solution casting method, and the film was stretched at a glass transition temperature, and then the retardation value of the film was measured. As a result, the in-plane retardation value / thickness retardation value were 37 nm / -75 nm.

Embodiment 2

[0073] A resin was prepared by using 90 parts by weight of a copolymer of methyl methacrylate (90 parts by weight) and cyclohexyl methacrylate (10 parts by weight) and 10 parts by weight of polycarbonate. The glass transition temperature and molecular weight of the prepared resin were measured, and as a result, a resin having a glass transition temperature of 121° C. and a molecular weight of 130,000 was obtained. A film was produced from the resin using a solution casting method, and the film was stretched at a glass transition temperature, and then the retardation value of the film was measured. As a result, the in-plane retardation value / thickness retardation value were 32 nm / -64 nm.

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Abstract

The present invention relates to mixed resin for a retardation film, a retardation film and a liquid-crystal display device comprising the same, the mixed resin comprising: 1) a copolymer resin comprising 70-99.9wt% of an alkyl methacrylate and 0.1-30wt% of a cycloalkyl methacrylate; and 2) polycarbonate-based resin comprising an aromatic ring or an aliphatic ring on the polymer main chain. The retardation film according to the present invention has outstanding properties including heat resistance, optical transparency, mechanical strength and durability.

Description

[0001] This application is a divisional application of a Chinese patent application with a filing date of November 27, 2009, an application number of "200980146370.3", and an invention title of "Retardation Film and Liquid Crystal Display Including the Retardation Film". technical field [0002] The present invention provides a resin blend, a retardation film, a method of manufacturing the above retardation film, and a liquid crystal display device comprising the retardation film, wherein the retardation film has excellent heat resistance and optical transparency, Low haze, not easy to crack, and has excellent mechanical strength and durability. [0003] This application claims priority from Korean Patent Application No. 10-2008-0119610 filed in the Korean Intellectual Property Office (KIPO) on Nov. 28, 2008, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0004] Recently, with the development of optical technology, display...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L69/00C08J5/18
CPCC08J5/18C08L33/12G02B1/04G02B5/3083C08L2203/16C08J2469/00C08J2333/12G02F2202/40G02F1/133634G02F1/133635C08L69/00C08J2333/10C08L33/10
Inventor 田炳圭韩昌薰姜秉逸金受庆成多恩
Owner LG CHEM LTD
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