Television – Camera – system and detail – Combined image signal generator and general image signal...
Reexamination Certificate
2003-10-29
2009-11-24
Ye, Lin (Department: 2622)
Television
Camera, system and detail
Combined image signal generator and general image signal...
C348S243000
Reexamination Certificate
active
07623164
ABSTRACT:
An object of this invention is to enable performing accurate DC recovery operation for an output signal from an image sensing element, and obtaining a high-quality image free from any image degradation such as a horizontal streak. To achieve this object, an image sensing apparatus includes first and second clamping circuits on the output side of an image sensing element. The image sensing element outputs a signal from an effective pixel region, a first reference signal for DC recovery of an image signal that is set for each row, and a second reference signal that is uniformly set for the pixel region. The first clamping circuit DC-recovers a signal from the effective pixel region for each row on the basis of the first reference signal. The second clamping circuit uniformly DC-recovers signals from the effective pixel region for the pixel region on the basis of the second reference signal. The first reference signal is a signal obtained in a horizontal reference region free from any influence of an output from the photodiode of the image sensing element. The second reference signal is a signal which is obtained in a vertical optical black region and contains a dark current component generated in the photodiode of the image sensing element.
REFERENCES:
patent: 5355164 (1994-10-01), Shimoyama et al.
patent: 6304292 (2001-10-01), Ide et al.
patent: 6353223 (2002-03-01), Ookawa
patent: 6700609 (2004-03-01), Abe
patent: 04-037166 (1992-02-01), None
patent: 08-307775 (1996-11-01), None
patent: 09-238287 (1997-09-01), None
patent: 2000-031450 (2000-01-01), None
patent: 2000-138869 (2000-05-01), None
patent: 2000-156822 (2000-06-01), None
patent: 2001-061108 (2001-06-01), None
patent: 2002-064196 (2002-02-01), None
patent: 2002-290841 (2002-10-01), None
English Translation of JP 04-037166 A (Feb. 7, 1992) English Translation made on May 2007.
Japanese Office Action dated Jun. 6, 2006 (Japanese Patent Appln. No. 2002-318405).
Canon Kabushiki Kaisha
Cowan Liebowitz & Latman P.C.
Hernández Nelson D. Hernández
Ye Lin
LandOfFree
Image sensing apparatus and method for accurate dark current... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image sensing apparatus and method for accurate dark current..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image sensing apparatus and method for accurate dark current... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4059507