CMOS image sensor and method of driving the same

Details CMOS image sensor and method of driving the same CMOS image sensor and method of driving the same

2007-02-27

2009-10-06

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208100, C348S297000, C348S302000, C348S308000

Reexamination Certificate

active

07598481

ABSTRACT:
A complementary metal-oxide semiconductor (CMOS) image sensor and a method of driving the CMOS image sensor that can reduce the number of devices required by each of a plurality of pixels and can stably drive the pixels, in which each of the pixels includes a photodiode that converts light energy into an electrical signal, a transfer transistor that transmits photocarriers stored in the photodiode to a floating diffusing region, a drive transistor that has a gate connected to the floating diffusion region and drives a voltage signal according to a voltage of the floating diffusion region, the voltage signal being output to an external device, and a capacitive device that is connected between a control voltage source and the floating diffusion region and, when a sensing operation of a corresponding pixel is terminated, deselects the pixel by altering the voltage of the floating diffusion region according to a control voltage provided by the control voltage source.

REFERENCES:
patent: 2007/0091191 (2007-04-01), Oike
patent: 11-298798 (1999-10-01), None
patent: 2004/019605 (2004-03-01), None

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