Variably responsive photosensor

Details Variably responsive photosensor Variably responsive photosensor

2007-05-17

2009-06-30

Soward, Ida M (Department: 2822)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Electromagnetic or particle radiation

C257S080000, C257S082000, C257S083000, C257S084000, C257S113000, C257S114000, C257S115000, C257S187000, C257S257000, C257S258000, C257S290000, C257S291000, C257S292000, C257S293000, C257S294000, C257S440000, C257S451000, C257S461000, C257S462000, C257S463000, C257S464000, C257S465000, C257SE25032, C257SE27133

Reexamination Certificate

active

07554170

ABSTRACT:
A photosensor includes a plurality of photosensitive regions including a first photosensitive region connected to a first voltage reference, and at least one additional photosensitive region. A signal collector is connected to the first photosensitive region. At least one switching device is for switching the at least one additional photosensitive region between the first voltage reference and a second voltage reference that is less than the first voltage reference, and for reversibly connecting the at least one additional photosensitive region to the signal collector so that the photosensor is variably responsive to different light levels.

REFERENCES:
patent: 3700961 (1972-10-01), Fletcher et al.
patent: 6124606 (2000-09-01), den Boer et al.
patent: 6448104 (2002-09-01), Watanabe
patent: 6642562 (2003-11-01), Watanabe
patent: 6756616 (2004-06-01), Rhodes
patent: 6815743 (2004-11-01), Rhodes
patent: 6858460 (2005-02-01), Rhodes et al.
patent: 7282382 (2007-10-01), Rieve et al.
Patent Abstracts of Japan, vol. 017, No. 646, Nov. 30, 1993 & JP 05207376, Olympus Optical Co. Ltd., Aug. 13, 1993.

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