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Light sensitive display

  • US 7,280,102 B2
  • Filed: 02/20/2003
  • Issued: 10/09/2007
  • Est. Priority Date: 02/20/2002
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal device comprising:

  • (a) a front electrode layer;

    (b) a rear electrode layer;

    (c) a liquid crystal material located between said front electrode layer and said rear electrode layer;

    (d) changing an electrical potential between said rear electrode layer and said front electrode layer to selectively modify portions of said liquid crystal material to change the polarization of the light incident thereon;

    (e) a plurality of light sensitive elements located together with said rear electrode layer; and

    (f) a pen that provides an optical signal of a visible color to said light sensitive elements where the intensity of said optical signal provided to said light sensitive elements of the same color is modified based upon pressure exerted by said pen against said liquid crystal device, wherein said device provides a non-binary output of the level of said optical signal detected by said light sensitive elements.

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