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LCD device having relationship between spontaneous polarization and capacitance

  • US 6,046,790 A
  • Filed: 03/19/1999
  • Issued: 04/04/2000
  • Est. Priority Date: 03/20/1998
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal display device comprising:

  • a first substrate having one major surface;

    pixel electrodes arranged in matrix fashion on the major surface of the first substrate;

    storage capacitors connected to the pixel electrodes;

    switching elements connected to the pixel electrodes;

    a liquid crystal layer provided close to the pixel electrodes arranged in matrix fashion, the liquid crystal having an inherent spontaneous polarization or a spontaneous polarization induced by application of an electric field;

    a common electrode formed on the liquid crystal layer; and

    a second substrate formed on the common electrode;

    wherein an electrostatic capacitance of one pixel in a saturation alignment state of the liquid crystal is CLC (F), a spontaneous polarization of the liquid crystal per unit area is Ps (C/m2), a voltage applied between the pixel electrode and the common electrode is E (V), a pixel electrode area of one pixel is A (m2), and a storage capacitance for one pixel is Cs (F), they satisfy the following equation;

    
    
    space="preserve" listing-type="equation">P.sub.s ×

    A≦



    (C.sub.s +C.sub.LC)×

    E(1).

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