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. 24, 2012
Filed:
Jan. 30, 2006
Atsushi Takaura, Tokyo, JP;
Takanobu Osaka, Kanagawa, JP;
Yasuyuki Takiguchi, Kanagawa, JP;
Toshiaki Tokita, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Kazuya Miyagaki, Kanagawa, JP;
Hiroyuki Sugimoto, Kanagawa, JP;
Atsushi Takaura, Tokyo, JP;
Takanobu Osaka, Kanagawa, JP;
Yasuyuki Takiguchi, Kanagawa, JP;
Toshiaki Tokita, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Kazuya Miyagaki, Kanagawa, JP;
Hiroyuki Sugimoto, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image projection device performing pixel shift in synchronization with sequential updating of image data is disclosed that is able to start and stop pixel shift operations within a period of updating the image frames while maintaining brightness of the image. The image projection device has an intermediate image formation optical system including a light valve able to update an image frame in a line-sequential manner, a pixel shift unit to shift the light path of a light beam from the light valve so as to shift a position of an image formed on the light valve, and an intermediate image formation unit arranged on the light path between the light valve and the pixel shift unit for forming an intermediate image of the image on the light valve at a position of the pixel shift unit.