REDUCING POWER CONSUMPTION IN A PORTABLE ELECTRONIC DEVICE WITH A LUMINESCENT ELEMENT

  • US 20100315535A1
  • Filed: 02/13/2008
  • Published: 12/16/2010
  • Est. Priority Date: 02/13/2008
  • Status: Abandoned Application
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First Claim
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1. A portable device Comprising:

  • at least one luminescent element;

    a camera including an image sensor for activation to produce an electrical image signal representative of an image sensed by the image sensor;

    a camera signal processor including a camera memory for storing said image signal for subsequent reproduction of said image;

    a luminescence controller for controlling a brightness of said luminescent element;

    wherein said camera signal processor is also arranged to activate said image sensor intermittently to produce sample signals representative of ambient light during periods in which said image signal is not being stored in said camera memory, said luminescence controller being responsive to said sample signals to control the brightness of said luminescent element as a function of a brightness of ambient light.

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