Wide dynamic range linear-and-log active pixel

Details Wide dynamic range linear-and-log active pixel Wide dynamic range linear-and-log active pixel

2008-09-17

2010-06-08

Tran, Sinh (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S294000, C348S301000, C348S308000, C257S292000

Reexamination Certificate

active

07733382

ABSTRACT:
A pixel circuit having an improved dynamic range is disclosed. When incoming light detected by the photodiode is strong, the accumulated (integrated) charge on a signal capacitor becomes large. To compensate, the excess signal component becomes compressed and the pixel circuit begins operating in logarithmic rather than linear mode. In this way, the circuit can achieve a higher dynamic range more closely resembling the image sensing properties of the human eye.

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