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:
Mar. 06, 2012
Filed:
Jun. 03, 2009
Applicants:
Chih-min Liu, Tainan, TW;
Boh-shun Chiu, Tainan, TW;
Ping-hung Yin, Tainan, TW;
Inventors:
Assignee:
Himax Imaging, Inc., Grand Cayman, KY;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 9/64 (2006.01); H04N 5/217 (2006.01);
U.S. Cl.
CPC ...
Abstract
A black level compensation (BLC) circuit is disclosed. The BLC circuit includes a switched-capacitor (SC) integrator configured to compensate a readout amplifier of an image sensor. An output of the readout amplifier is clamped to a reference voltage at which a black level of the image sensor is defined. According to one aspect, a bad pixel detector is used to detect a bad pixel or pixels and disconnect the BLC loop when the bad pixel or pixels are detected.