Solid-state image sensing apparatus for electronically controlli

Details Solid-state image sensing apparatus for electronically controlli Solid-state image sensing apparatus for electronically controlli

1990-10-16

1991-08-13

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358228, 35821311, 35821319, 358909, 35821325, 358168, 354402, H04N 5335, H04N 314, H04N 5238

Patent

active

050400703

ABSTRACT:
In solid-state image sensing apparatus including a frame transfer type CCD 10 as a solid-state image sensing device, charges stored in a light receiving portion 11 are once discharged externally in each vertical scanning period. Thereafter, newly stored charges are read as signal charges in a storage portion 12 in a vertical blanking period. Timing to discharge the charges is then set in accordance with an exposure state of the CCD, so that an exposure period is shortened and expanded. The width of a single shortening and expansion of the exposure period is variable. Particularly, when the charge discharging timing enters in the vertical blanking period, and the exposure period becomes significantly short, the charge discharging timing is set in a unit of a shorter period than one horizontal period of an image signal. This enables a uniform ratio of variation of the exposure period and prevention of unnatural changes of luminance on a reproduced picture.

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