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LCD splay/twist compensator having varying tilt and /or azimuthal angles for improved gray scale performance

DC
  • US 5,619,352 A
  • Filed: 07/31/1996
  • Issued: 04/08/1997
  • Est. Priority Date: 04/04/1994
  • Status: Expired due to Term
First Claim
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1. A compensator for a liquid crystal display, wherein:

  • (a) said compensator comprises a layer of a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and a azimuthal angle, measured relative to the plane of the layer;

    (b) said birefringent material comprises a polymer matrix including polymerized nematic material and unpolymerized nematic material;

    (c) each of said tilt angle and said azimuthal angle varies along an axis normal to said layer, said tilt angle limited to values between approximately 25 degrees and approximately 65 degrees; and

    (d) said variations in tilt angle and azimuthal angle being defined by a combination of molecular orientations of said polymerized nematic material and said unpolymerized nematic material.

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