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Controlling an exposure time for digital cameras

  • US 8,073,321 B2
  • Filed: 08/18/2008
  • Issued: 12/06/2011
  • Est. Priority Date: 07/29/2005
  • Status: Expired due to Fees
First Claim
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1. A digital photography device comprising:

  • a sensor array configured to receive light from an object propagating along an optical path;

    a mechanical global shutter disposed in the optical path and characterized by a first shutter speed implemented during a pre-flash illumination period that is substantially equal to a second shutter speed implemented during a flash illumination period, wherein shutter speed measures how quickly the mechanical global shutter opens and closes to begin and end exposing the sensor array to light;

    a flash configured to generate pulsed illumination; and

    a controller in electrical communication with the flash, wherein the controller is configured to provide a trigger signal to the flash.

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