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Varying light transmittance through a display panel

  • US 6,762,801 B2
  • Filed: 05/18/2001
  • Issued: 07/13/2004
  • Est. Priority Date: 05/21/2000
  • Status: Expired due to Fees
First Claim
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1. A system for varying the transmittance of light through selected portions of a display, said system comprising:

  • an image display panel;

    an image display source for projecting images on said panel;

    an LC-based, variable transmittance optical (VTO) media;

    a light sensor for measuring ambient light; and

    a signal generator connected to said VTO media for applying voltage to portions of said media at levels determined and controlled by said sensor;

    whereby the transmittance of light through said portions of said media is varied in accordance with the ambient light which results in a corresponding variation in the transmissivity of said portions of the panel.

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