Liquid crystal display having high contrast viewing zone centered in positive or negative vertical region

  • US 6,226,065 B1
  • Filed: 06/16/1999
  • Issued: 05/01/2001
  • Est. Priority Date: 12/15/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A liquid crystal display capable of displaying an image to a viewer, the display comprising:

  • a pair of electrodes sandwiching a liquid crystal layer therebetween, said pair of electrodes for applying a voltage across said liquid crystal layer;

    first and second polarizers sandwiching said liquid crystal layer therebetween;

    first and second orientation layers disposed adjacent said liquid crystal layer on opposite sides thereof, said first and second orientation layers for aligning liquid crystal molecules of said liquid crystal layer;

    first and second negative biaxial retardation members, wherein each of said first and second negative biaxial retardation members has a retardation value d.Δ

    nZY of from about −

    10 to −

    100 nm where “

    d”

    is the thickness of the retardation member; and

    wherein at least a portion of each of said first and second negative biaxial retardation members has indices of refraction nx, ny, and nz where nz is oriented in a direction perpendicular to nx and ny.

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