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. 10, 2006
Filed:
Dec. 28, 2000
Yoshinori Ishii, Moriyama, JP;
Takao Uesugi, Nakakubiki-gun, JP;
Koichi Watanabe, Joetsu, JP;
Gunze Co., Ltd., Kyoto, JP;
Poratechno Co., Ltd., Niigata, JP;
Abstract
A polarizing plate with a drop in polarization efficiency, hue shift, and light leakage do not substantially occur under a high humidity/high temperature environment, and a liquid crystal display device utilizing the same are provided. The polarizing plate of the present invention includes a polyvinyl-alcohol-based polarizing film wherein after being subjected to an atmosphere of 80° C. and 90% RH for 24 hours, the retention of the polarization efficiency is 0.97 or more, the retention of the luminance is 3.0 or less, and an absolute value for the amount of change in value 'a' is 0.6 or less and an absolute value for the amount of change in value 'b' is 1.0 or less, according to the Hunter-Lab method. A liquid crystal display device of the present invention includes such a polarizing plate affixed thereto.