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:
Nov. 25, 2008
Filed:
Jul. 22, 2005
Takashi Tanimoto, Motosu-gun, JP;
Tomomichi Nakai, Hashima-gun, JP;
Takashi Tanimoto, Motosu-gun, JP;
Tomomichi Nakai, Hashima-gun, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
In exposure control of an imaging apparatus, if a vertical scanning period is enlarged to increase an exposure time when the exposure time reaches an upper limit value, there occurs a problem in that a frame rate is reduced. Accordingly, when a subject is dark, an auto exposure control circuit sets the vertical scanning period V to a standard value Vst, increases the exposure time E to the upper limit value Emax (P) and then increases a gain α of an AGC circuit (P). If the image is still dark even when the gain α reaches the upper limit value α max, the auto exposure control circuit switches the vertical scanning period V to an enlarged value Vex and thus more increases the exposure time E (P).