Image sensor and pixel that has positive transfer gate...

Details Image sensor and pixel that has positive transfer gate... Image sensor and pixel that has positive transfer gate...

2011-06-07

2011-06-07

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S362000

Reexamination Certificate

active

07956913

ABSTRACT:
A pixel and image sensor formed in accordance with the present invention has two modes of operation: a normal mode and a low light mode. The present invention switches from a normal to a low light mode based upon the amount of illumination on the image sensor. Once the level of illumination is determined, a decision is made by comparing the level of illumination to a threshold whether to operate in normal mode or low light mode. In low light mode, the reset transistor (for a 3T pixel) or the transfer transistor (for a 4T pixel) is biased positive.

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