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PHOTO SENSITIVE DEVICE

  • US 20090051553A1
  • Filed: 08/23/2007
  • Published: 02/26/2009
  • Est. Priority Date: 08/23/2007
  • Status: Active Grant
First Claim
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1. A photosensitive device for warning an individual that the interior light level on one side of a window is greater than the exterior light level on an opposite side of the window, said device comprising:

  • a first photosensor constructed and arranged for determining the interior light level on a first side of a window;

    a second photosensor constructed and arranged for determining the exterior light level on an opposite side of the window;

    comparator means for determining when the interior light level is greater than the exterior light level; and

    an alarm responsive to an output of said comparator means for warning an individual that the interior light level is greater than the exterior light level.

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