Image sensor and pixel that has variable capacitance output...

Details Image sensor and pixel that has variable capacitance output... Image sensor and pixel that has variable capacitance output...

2007-03-20

2007-03-20

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S308000

Reexamination Certificate

active

10956982

ABSTRACT:
A pixel and image sensor formed in accordance with the present invention has two modes of operation: a 3T mode and a 4T mode. The present invention switches from a 3T to a 4T mode based upon the amount of illumination on the image sensor. The amount of illumination on the image sensor can be determined in a variety of ways. Once the level of illumination is determined, a decision is made by comparing the level of illumination to a threshold whether to operate in 3T mode (for high illumination) or 4T (for low illumination) mode.

REFERENCES:
patent: 6246436 (2001-06-01), Lin
patent: 6307195 (2001-10-01), Guidash
patent: 1 265 290 (2002-11-01), None
patent: WO-02-063691 (2002-08-01), None
European Search Report for European Application No. EP 0 525 5670 completed on Mar. 2, 2006, 3 pages.

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