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. 30, 2014
Filed:
Nov. 23, 2012
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Kazu Kobayashi, Kai, JP;
Yutaka Tsuchiya, Hara-mura, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
G02F 1/13362 (2013.01); G02F 1/133634 (2013.01); G02F 1/133734 (2013.01); G02F 2413/12 (2013.01);
Abstract
An O plate is included which includes a phase difference compensating layer which is an assembly of columns obtained by oblique deposition of an anisotropic refractive index medium with respect to a substrate and has negative biaxial refractive index anisotropy. In the O plate, a front surface phase difference value of the O plate in the normal direction is 5-15 nm, and a ratio of Re(−30)/Re(30) is 2.5-5.5.