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:
Oct. 27, 2015
Filed:
Jul. 03, 2012
Applicants:
Fumihiro Hasegawa, Tokyo, JP;
Toshio Miyazawa, Kanagawa, JP;
Michiyoshi Tachikawa, Kanagawa, JP;
Inventors:
Assignee:
RICOH COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); H04N 9/31 (2006.01); G03B 21/20 (2006.01); G09G 5/393 (2006.01); G03B 21/53 (2006.01);
U.S. Cl.
CPC ...
H04N 9/3185 (2013.01); G03B 21/142 (2013.01); G03B 21/2086 (2013.01); H04N 9/3182 (2013.01); H04N 9/3194 (2013.01); G03B 21/53 (2013.01); G09G 5/393 (2013.01); G09G 2320/0261 (2013.01); H04N 9/3129 (2013.01);
Abstract
A projection display device including: an image light projecting unit that projects image light on a screen; a distance measurement unit that measures distance to the screen; an obstacle detecting unit that detects an obstacle between the screen and the image light projecting unit on the basis of distance information obtained by the distance measurement unit and, according to a result of this detection, determines an adjustment area where the image light to be projected is to be adjusted; and a projection adjusting unit that adjusts the image light in the adjustment area are included.