Active pixel sensor and imaging system having differential mode

Details Active pixel sensor and imaging system having differential mode Active pixel sensor and imaging system having differential mode

H - Electricity

04

N

H04N 5/335 (2006.01) H04N 3/15 (2006.01)

Patent

CA 2156946

An active pixel imaging system and method to generate an differential output signal consisting of the differences in a viewed image between adjacent detected frames. A buffered electrical charge storage capacity of the active pixel sensor is utilized to provide a system with reduced complexity and hardware requirements. In the imaging system, when a particular active pixel sensor is activated it generates a voltage signal corresponding to a previous frame's detect light intensity before the pixel is reset to generate a voltage signal corresponding to a present frame's detected light intensity. A differential output circuit is used to generate a differential output signal based on these two generated voltage signals.

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