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:
Apr. 28, 2015
Filed:
May. 20, 2010
Akira Sakai, Osaka, JP;
Kazuyoshi Sakuragi, Osaka, JP;
Masahiro Hasegawa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display (LCD) device includes a birefringent layer that satisfies the relationship nx>ny≧nz and may be considered a first-class birefringent layer, a birefringent layer that satisfies the relationship nx<ny≦nz may be considered a second-class birefringent layer, and a birefringent layer that satisfies the relationship nx≅ny≧nz may be considered a third-class birefringent layer. The LCD may include a first polarizer, a first first-class birefringent layer whose in-plane phase difference is adjusted to a quarter wave, an LC cell, a second first-class birefringent layer whose Nz factor is substantially the same as the first first-class birefringent layer and whose in-plane phase difference is adjusted to a quarter wave, a second-class birefringent layer, and a second polarizer which may be stacked in this order.