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. 27, 1999
Filed:
Nov. 08, 1996
Applicant:
Inventor:
Takehiro Okada, Ibaraki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359487 ; 359485 ; 359496 ; 349-5 ; 349-9 ; 353 20 ; 353 81 ;
Abstract
Light from a light source is divided into P-and S-polarized beams by means of a polarizing beam splitter and converted into the same polarized wave. Two polarized waves are incident on a liquid crystal panel symmetrically at the same angle on right and left sides. An integrator comprising two lens arrays is disposed before and behind these polarization converting elements, and therefore brightness can be uniformly increased with a simple construction while achieving space saving.