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. 18, 2023
Filed:
Aug. 31, 2021
Applicants:
Yohei Takano, Kanagawa, JP;
Shigeaki Imai, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Makoto Hirakawa, Tokyo, JP;
Inventors:
Yohei Takano, Kanagawa, JP;
Shigeaki Imai, Kanagawa, JP;
Kazuhiro Fujita, Tokyo, JP;
Makoto Hirakawa, Tokyo, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/16 (2006.01); G02B 5/00 (2006.01); G02B 7/02 (2021.01); G02B 26/08 (2006.01); G03B 21/00 (2006.01); G02B 13/22 (2006.01); G03B 21/20 (2006.01);
U.S. Cl.
CPC ...
G02B 13/16 (2013.01); G02B 5/003 (2013.01); G02B 7/02 (2013.01); G02B 13/22 (2013.01); G02B 26/0833 (2013.01); G03B 21/008 (2013.01); G03B 21/2026 (2013.01);
Abstract
An image projection apparatus includes: a light source; an image display element including multiple micromirrors arranged in two dimensions, the multiple micromirrors forming an image display plane, each micromirror having a reflecting surface; and a projection optical system. Conditional expressions (1) and (2) below are satisfied:θ1≥14(deg)  (1)1.2<<2.2  (2)