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:
Jun. 27, 2006
Filed:
Jun. 13, 2005
Tsutomu Nakashima, Yokohama, JP;
Satoshi Ouchi, Kamakura, JP;
Taro Imahase, Fujisawa, JP;
Tomohiro Miyoshi, Fujisawa, JP;
Tsutomu Nakashima, Yokohama, JP;
Satoshi Ouchi, Kamakura, JP;
Taro Imahase, Fujisawa, JP;
Tomohiro Miyoshi, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a compact, light, inexpensive reflection type liquid crystal projector optical unit or reflection type liquid crystal projector which provides high brightness without contrast deterioration caused by light leakage associated with black image display. The unit or projector uses, as a polarizer/analyzer for a reflection liquid crystal panel, a reflection polarizing plate which functions as a polarizing plate by its grating function only in a specific direction. It also uses an auxiliary polarizer and an absorption auxiliary analyzer. Their reflection axis or absorption axis is adjusted according to the characteristic of the reflection liquid crystal panel so as to minimize light leakage associated with black image display.