Television – Camera – system and detail – Solid-state image sensor
Reexamination Certificate
2006-01-31
2006-01-31
Vu, Ngoc-Yen (Department: 2612)
Television
Camera, system and detail
Solid-state image sensor
C348S308000, C348S241000, C250S208100
Reexamination Certificate
active
06992715
ABSTRACT:
The invention disclosed is directed to a method and apparatus which allows a “rolling shutter” type of read out sequence in a pixel array that is read using a double sampling technique by having the rows of pixels reset a second time in each of their cycles for a second sampling while the rows are being accessed for reading. In this way, each pixel is sampled to compare its voltage level after integration to its voltage level as it is reset. In accordance with the present invention, the row access signal or a signal that is used to generate the row access signal, is used to generate a second reset signal at the correct time while the row is being accessed. The invention is particularly applicable to image sensors having light sensitive elements that are CMOS pixels, and in particular three transistor pixels.
REFERENCES:
patent: 5410348 (1995-04-01), Hamasaki
patent: 6218656 (2001-04-01), Guidash
patent: 6410899 (2002-06-01), Merrill et al.
patent: 6624850 (2003-09-01), Guidash
patent: 6864919 (2005-03-01), Hua
patent: 0 569 202 (1993-11-01), None
patent: WO 99/05853 (1999-02-01), None
Jerabek Kelly
Pearne & Gordon LLP
Psion Teklogix Systems Inc.
Vu Ngoc-Yen
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