Television – Camera – system and detail – Solid-state image sensor
Reexamination Certificate
2005-11-08
2005-11-08
Garber, Wendy R. (Department: 2612)
Television
Camera, system and detail
Solid-state image sensor
C348S308000, C348S241000, C257S223000
Reexamination Certificate
active
06963371
ABSTRACT:
The output voltages of dark pixels and optical black (OB) pixels are different between a row including a pixel which receives strong light and another row. An image formed upon receiving a strong light spot suffers whitish bands on the right and left of the spot. To solve this problem, this invention provides an image pickup apparatus including a pixel containing a photodiode which converts a photo-signal into a signal charge and accumulates the signal charge and an amplifier transistor which amplifies the signal charge accumulated in the photodiode, and a control element adapted to limit the output of the amplifier transistor so as to prevent the output from falling to below a determined voltage.
REFERENCES:
patent: 5793423 (1998-08-01), Hamasaki
patent: 6677993 (2004-01-01), Suzuki et al.
patent: 6784931 (2004-08-01), Kudo
patent: 2001/0033337 (2001-10-01), Sakuragi
Eguchi Tomoko
Fujimura Masaru
Hiyama Hiroki
Inui Fumihiro
Koizumi Toru
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Garber Wendy R.
Vieaux Gary C.
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