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Method and apparatus for driving liquid crystal display device

  • US 5,204,660 A
  • Filed: 10/04/1991
  • Issued: 04/20/1993
  • Est. Priority Date: 10/05/1990
  • Status: Expired due to Term
First Claim
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1. A method of driving a liquid crystal display device, said liquid crystal display device comprising:

  • switching elements each having a nonlinear current-voltage characteristic which is asymmetrical between positive and negative directions of voltage application;

    a plurality of pixels each incorporating said switching element; and

    a liquid crystal having a threshold voltage Vth (V) and a saturation voltage Vsat (V) as electrooptical characteristics,wherein said liquid crystal display device is time-divisionally driven by a voltage waveform constituted by a select period in which a signal voltage is written in predetermined pixels and a nonselect period in which the written signal voltage is held, and an absolute value Vb (V) of the voltage applied to said pixels during the nonselect period satisfies a relation of;

    
    
    space="preserve" listing-type="equation">V'"'"'/2-0.4≦

    Vb≦

    V'"'"'/2+0.5(where V'"'"'=Vth+Vsat).

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