US 8,139,181 B2 · Polarization plate, liquid crystal display device and protective film

Abstract

Provided are a polarization plate which has a high mechanical strength, which does not impair a visibility even under a high temperature and high humidity, which is excellent in flexibility and abrasion resistance, and which reduces a visible disturbance such as color unevenness due to a size change, as well as a liquid crystal display device using the polarization plate. A film composed of a plurality of layers composed mainly of thermoplastic resins is used as a first protection film used for a visible side of the polarization plate, and at least one surface layer of this first protection film is composed mainly of an acrylic resin. Furthermore, a second protection film having a specific property is disposed at a side of a liquid crystal cell.

Claims8

Dependent claims

A protection film comprising an intermediate layer containing a thermoplastic resin 1, a surface layer 2 containing a thermoplastic resin 2 laminated on a surface of said intermediate layer, and a surface layer 3 containing a thermoplastic resin 3 laminated on the other surface of said intermediate layer,

either one or both of said surface layer 2 and said surface layer 3 being composed of an acrylic resin having a glass transition temperature (Tg) of 100° C. or higher,
said intermediate layer containing an ultraviolet light absorber,
one or more of said intermediate layer, said surface layer 2 and said surface layer 3 containing elastic particles, and
wherein the thickness of either one or both of said surface layer 2 and said surface layer 3 is 10 μm or more.

1 more element

Dependencies are inferred from the claim text.

Polarization plate, liquid crystal display device and protective film

Life of this patent

Polarization plate, liquid crystal display device and protective film

Life of this patent

Abstract

Claims8