Image analysis – Image sensing – Optical
Patent
1997-03-21
1999-03-09
Boudreau, Leo H.
Image analysis
Image sensing
Optical
382317, G06K 900
Patent
active
058811842
ABSTRACT:
An active pixel image sensing device that provides uniform integration periods and either independent pixel reset, row, pixel reset, or column pixel reset, having a plurality of photodetector elements arranged in a matrix of rows and columns, each of the photodetectors having a transfer gate operatively connecting the photodetectors to a floating diffusion and further including a reset and clamp and sample function. A reset transistor for each row of photodetectors having a gate that can have a predetermined voltage applied to reset each row, and a column reset transistor for each column of photodetectors having a gate that can have a predetermined voltage applied to reset each column. This allows for uniform integration periods and a signal sample and clamp circuit for the entire array of photodetectors.
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Elji Oba, Keiji Mabuchi, Yoshinora Lida, Noburo Nakamura, Hiroki Miura "A 1/4 inch 300K Square Pixel Progressive Scan CMOS Active Pixel Image Sensor," 1997 IEEE International Solid-State Circuits Conference, pp. 180-189 and 452-454.
Boudreau Leo H.
Eastman Kodak Company
Leimbach James D.
Tadayon Bijan
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