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:
May. 21, 2019
Filed:
Sep. 11, 2015
Applicant:
Zeon Corporation, Chiyoda-ku, Tokyo, JP;
Inventor:
Kazuhiro Oosato, Tokyo, JP;
Assignee:
ZEON CORPORATION, Chiyoda-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02F 1/13 (2006.01); G09G 3/3208 (2016.01); G02F 1/13363 (2006.01); H01L 51/50 (2006.01); H05B 33/02 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3041 (2013.01); G02B 5/30 (2013.01); G02B 5/3066 (2013.01); G02F 1/13 (2013.01); G02F 1/13363 (2013.01); G02F 1/133528 (2013.01); G09G 3/3208 (2013.01); H01L 51/50 (2013.01); H05B 33/02 (2013.01); G02F 2001/133541 (2013.01); G02F 2001/133637 (2013.01); G02F 2001/133638 (2013.01); G02F 2201/56 (2013.01); G02F 2203/05 (2013.01); G02F 2203/58 (2013.01); G02F 2413/02 (2013.01); G02F 2413/06 (2013.01);
Abstract
A long-length circularly polarizing plate including: a polarizing film; a λ/2 plate having a slow axis in a direction forming an angle of 22.5°±10° relative to an absorption axis of the polarizing film; and a plate having a slow axis in a direction forming an angle of 90°±20° relative to an absorption axis of the polarizing film, in this order, wherein the λ/2 plate and the λ/4 plate have different wavelength dispersions, and an NZ factor of the λ/4 plate NZq satisfies NZq≤0.0.