Photo-sensor array with pixel-level signal comparison

Details Photo-sensor array with pixel-level signal comparison Photo-sensor array with pixel-level signal comparison

2005-07-12

2005-07-12

Porta, David (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S297000, C348S301000, C348S302000, C348S308000, C348S310000

Reexamination Certificate

active

06917030

ABSTRACT:
Pixels in an array of image sensor pixels contain photo-sensors. In response to illumination of a photo-sensor, an initial signal is generated. Multiple comparison signals are also generated based on the initial signal. One of the comparison signals remains internal to the pixel, and other comparison signals are transmitted to neighboring pixels. Within a pixel, the internal comparison signal is compared to a sum of comparison signals received from neighboring pixels. Based on the comparison, a data value may be latched and used for indicating a relative difference in pixel illumination.

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