The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2005
Filed:
Feb. 08, 2002
Seiichi Kusumoto, Ibaraki, JP;
Hisashi Mihara, Ibaraki, JP;
Atsushi Kitagawa, Ibaraki, JP;
Eiji Hamamoto, Ibaraki, JP;
Seiichi Kusumoto, Ibaraki, JP;
Hisashi Mihara, Ibaraki, JP;
Atsushi Kitagawa, Ibaraki, JP;
Eiji Hamamoto, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki, JP;
Abstract
A polarizing plate and a liquid crystal display using the same are disclosed. The polarizing plate includes a polarizer made of a synthetic resin and protective films. The same protective films are attached to both sides of the polarizer. When a FTIR-ATR method is carried out with respect to the both sides of the protective film and a peak intensity (A) in the wavelength range around 1488 cmof one side, a peak intensity (B) in the wavelength range around 1365 cmof one side, a peak intensity (A') in the wavelength range around 1488 cmof another side and a peak intensity (B′) in the wavelength range around 1365 cmof another side are measured, and (C) and (C′) are represented by the relationships: (A)/(B)=(C) and (A′)/(B′)=(C′), (C)/(C′)≧1.2 is satisfied. The same sides of the protective films having the (C) and (C′) are adhered to both sides of the polarizer. In the polarizing plates, in accordance with the invention, even at the exposure to heat and humidity, advantageously occurrence of curling (warping) is reproduced.