Image pickup apparatus including a plurality of pixels, each...

Details Image pickup apparatus including a plurality of pixels, each... Image pickup apparatus including a plurality of pixels, each...

2005-05-03

2009-08-18

Chan, Jason (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

Reexamination Certificate

active

07576788

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 predetermined voltage.

REFERENCES:
patent: 5793423 (1998-08-01), Hamasaki
patent: 6677993 (2004-01-01), Suzuki et al.
patent: 6784931 (2004-08-01), Kudo
patent: 7355645 (2008-04-01), Sakurai et al.
patent: 2001/0033337 (2001-10-01), Sakuragi

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