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:
Feb. 28, 2006
Filed:
Nov. 13, 2003
Hideki Ohmae, Hyogo, JP;
Mitsuhiro Wada, Osaka, JP;
Kazunori Tanabe, Okayama, JP;
Shigeru Aruga, Osaka, JP;
Hirokazu Sakaguchi, Osaka, JP;
Hisatoshi Shimose, Osaka, JP;
Hideki Ohmae, Hyogo, JP;
Mitsuhiro Wada, Osaka, JP;
Kazunori Tanabe, Okayama, JP;
Shigeru Aruga, Osaka, JP;
Hirokazu Sakaguchi, Osaka, JP;
Hisatoshi Shimose, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A projection display device includes a condensing unit and a shading unit. The condensing unit condenses light emitted from a light source to form a condensed spot on a color wheel. The shading unit, when a size of the condensed spot on the color wheel has increased due to an increase in light emission of the light source, shades a portion of the light passing through the color wheel corresponding to the increased size.