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:
Dec. 01, 2009
Filed:
Jul. 19, 2006
Asao Kokubo, Kawasaki, JP;
Hiroshi Daiku, Kawasaki, JP;
Yutaka Takeda, Yokohama, JP;
Norihiro Yoshida, Yokohama, JP;
Asao Kokubo, Kawasaki, JP;
Hiroshi Daiku, Kawasaki, JP;
Yutaka Takeda, Yokohama, JP;
Norihiro Yoshida, Yokohama, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
An automatic gain control circuit generates, based on comparison between an average brightness of brightness data output for each frame from an image sensor and a target brightness, an integration time adjustment signal for adjusting an integration time during which the image sensor is exposed, a gain adjustment signal for adjusting gain of an amplifier that amplifies an output signal of the image sensor, and a frame rate adjustment signal for changing a frame rate. The automatic gain control circuit includes an exposure control circuit for adjusting a blanking time of each frame and generating, as the frame rate adjustment signal, a maximum integration time adjustment signal for switching a maximum integration time of the image sensor.