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General film compensated reflective liquid crystal display

  • US 20050237456A1
  • Filed: 12/30/2004
  • Published: 10/27/2005
  • Est. Priority Date: 04/27/2004
  • Status: Active Grant
First Claim
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1. A liquid crystal display, comprising:

  • a liquid crystal cell comprising a liquid crystal layer, and having a twisted angle φ and

    a half residual phase α

    ;

    a compensation film disposed on the liquid crystal cell, and having a phase retardation δ

    in the range of (δ

    0

    0.2π

    )≦

    δ





    0+0.2π

    ) and a slow axis angle θ

    in the range of 0°



    θ



    180°

    ; and

    a polarizer disposed on the compensation film and having a polarizer angle β

    in the range of (β

    020°

    +n·

    90°

    )≦

    β





    0+20°

    +n·

    90°

    );

    wherein the phase retardation δ

    0 satisfies the following relation;

    δ

    0
    =atan

    (sin2

    ϕ

    +cos





    2

    α

    cos
    2


    ϕ

    sin





    α

    sin2θ

    sin2ϕ

    +sin





    2

    α

    cos2θ

    cos
    2


    ϕ

    )
    ,and
    wherein n is an integer with β

    0 satisfies the following relation;

    β

    0
    =θ

    +12

    atan

    (-sin2

    ϕ

    +cos





    2

    α

    cos
    2


    ϕ

    sin





    δ

    0


    (sin





    α

    cos2θ

    sin2ϕ

    -sin





    2

    α

    sin2θ

    cos
    2


    ϕ

    )
    )
    .

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