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. 03, 2012
Filed:
Apr. 14, 2008
Yoshihiro Furuta, Osaka, JP;
Yoshihiro Furuta, Osaka, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
An LCD panel () is provided on the light-incidence side thereof with a reflective polarizer. An optical compensator () is provided between a reflective polarizer () and the LCD panel () to reduce birefringence that takes place in the liquid crystal of the LCD panel (). A further absorptive polarizer () is provided between a reflective polarizer () and the optical compensator (). The reflective polarizer () and the absorptive polarizer () are arranged so that their transmission axes coincide to each other. Thus, the absorptive polarizer and optical compensator together cooperate to compensate for the deficient polarization degree of the reflective polarizer to improve the contrast of a displayed image. The absorptive polarizer absorbs unwanted catoptric light. The optical compensator removes irregularity in the blackness of the LCD panel that would otherwise appear in the black display screen. Thus, degradation of picture quality of a displayed image caused by unwanted catoptric light undergoing multiple reflections in the LCD panel can be eliminated by the absorptive polarizer in collaboration with the optical compensator.