Image sensor with stabilized black level and low power...

Details Image sensor with stabilized black level and low power... Image sensor with stabilized black level and low power...

2006-08-29

2006-08-29

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07098950

ABSTRACT:
The control inputs of reset switch elements41to45are commonly connected to a row reset line51. In a line black clamp type, cathodes as reset ends of photodiodes (31) of optical black pixels21to23are commonly connected to a potential averaging line30. In a frame black clamp type, potential averaging lines are connected similarly to respective pixel rows on the vertical scanning start side of an optical black pixel region, and the potential averaging lines may be commonly connected to each other to operate just like one pixel row. A first block includes a pixel array and a vertical scanning circuit, while a second block includes sample and hold circuits, a horizontal scanning circuit, an amplifier and an A/D converter19. In a low power consumption mode, power supply to the second block is ceased in a light integration period of one frame with performing light integration in the pixel array, power supply to the first and second blocks is performed in a read-out period of one frame to read out integrated signals, and power supply to the first and second blocks is ceased in a power-off period of one frame.

REFERENCES:
patent: 5949483 (1999-09-01), Fossum et al.
patent: 6130712 (2000-10-01), Miyazaki et al.
patent: 6452153 (2002-09-01), Lauxtermann et al.
patent: 6627896 (2003-09-01), Hashimoto et al.
patent: 6903768 (2005-06-01), Ohsawa et al.
patent: 4-142891 (1992-05-01), None

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