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Thin cell gap microdisplays with optimum optical properties

  • US 6,801,285 B1
  • Filed: 01/14/2003
  • Issued: 10/05/2004
  • Est. Priority Date: 09/20/2001
  • Status: Expired due to Fees
First Claim
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1. A microdisplay, comprising:

  • a silicon substrate having disposed thereon a first alignment layer having a first alignment direction;

    a cover substrate having disposed thereon a second alignment layer having a second alignment direction, said alignment layers facing one another to form a cell gap wherein said cell gap is about 1.2 microns ±

    0.2 microns; and

    a nematic liquid crystal material disposed between said silicon substrate and said cover substrate, said first and second alignment directions having about a 27 degree ±

    5 degree angle therebetween, wherein said liquid crystal material has a turn-on time no greater than 0.5 milliseconds and a turn-off time no greater than about 2.5 milliseconds.

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