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Electronic photographic camera

  • US 4,420,773 A
  • Filed: 06/18/1981
  • Issued: 12/13/1983
  • Est. Priority Date: 06/30/1980
  • Status: Expired due to Term
First Claim
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1. An electronic photographic camera comprising:

  • (a) an optical system forming an image of an object to be photographed;

    (b) a solid state imaging sensing device including a plurality of light-receiving elements disposed in the imaging plane of said optical system and producing a charge corresponding to the quantity of incident light and accumulating the charge therein, first and second gate means for transferring the charge accumulated in said elements respectively, register means for putting out the charge transferred by the opening of said first gate means successively in time-series fashion correspondingly to each of said elements, and drain means for receiving the charge accumulated in said elements beyond a predetermined amount during the closing of said second gate means and receiving the charge produced in said elements during the opening of said second gate means;

    (c) first and second gate control means for executing in a time sequential order a first control where said first gate means is closed and also said second gate means is opened, a second control where both said first and second gate means are closed for a perdetermined period and a third control where said first gate means is opened and also said second gate means is closed; and

    (d) means for metering the brightness of said object by the amount of charge drained from said drain means through said second gate means which is opened by said first control of said control means.

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