Digital electronic exposure control

Details Digital electronic exposure control Digital electronic exposure control

H - Electricity

04

N

H04N 5/235 (2006.01) H04N 5/335 (2006.01) H04N 3/15 (2006.01)

Patent

CA 2131805

A system and method for electronically controlling charge coupled device (CCD) fight sensitivity. The present invention controls CCD light sensitivity by electrically controlling a CCD (204) such that the CCD (204) discharges charge for a percentage of a field integration period. In other words, the present invention electronically varies the CCD's exposure time. The present invention operates as follows. First, the present invention calculates a new exposure time for a field integration period. Second, the present invention electrically causes the CCD (204) to discard charge accumulated by the CCD (204) during the field integration period except during a portion of the field integration period defined by the new exposure time.

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