Photo-sensor array for motion detection

Details Photo-sensor array for motion detection Photo-sensor array for motion detection

2005-06-14

2005-06-14

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S214100, C250S2140RC, C382S312000, C382S313000, C348S310000, C341S155000

Reexamination Certificate

active

06906304

ABSTRACT:
Pixels in an array of image sensor pixels contain photo-sensors and circuits having inputs connected to the photosensors. The circuits have feedback loops for reducing fixed pattern noise in the array. Output from each pixel is used to latch a multibit counter value supplied by a global counter. Each feedback loop preferably includes a pair of alternately-toggling switching transistors to minimize unwanted charge injection. An image sensor according to the invention can be used for, e.g., motion sensing.

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