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:
Sep. 09, 2008
Filed:
Nov. 25, 2005
Tsuyoshi Chiba, Osaka, JP;
Hiroyuki Okada, Osaka, JP;
Yoshitsugu Kitamura, Osaka, JP;
Shunsuke Shutou, Osaka, JP;
Tsuyoshi Chiba, Osaka, JP;
Hiroyuki Okada, Osaka, JP;
Yoshitsugu Kitamura, Osaka, JP;
Shunsuke Shutou, Osaka, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
To provide a polarizing plate provided with optical compensation layers capable of contributing to thickness reduction, preventing uneven display due to heat, and favorably preventing light leak in black display, and an image display apparatus using the same. The polarizing plate provided with optical compensation layers of the present invention includes a polarizer, a first optical compensation layer, a second optical compensation layer, and a third optical compensation layer in the stated order. The first optical compensation layer, the second optical compensation layer, and the third optical compensation layer each have predetermined absolute value of photoelastic coefficient, refractive index profile, and in-plane retardation and/or thickness direction retardation. An absorption axis of the polarizer and a slow axis of the first optical compensation layer form an angle of 10° to 30°. The absorption axis of the polarizer and a slow axis of the second optical compensation layer form an angle of 70° to 95°. The absorption axis of the polarizer and a slow axis of the third optical compensation layer form an angle of 70°to 95°.