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Liquid crystal display device

  • US 5,751,267 A
  • Filed: 02/27/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 03/31/1995
  • Status: Expired due to Term
First Claim
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1. A liquid crystal display device, comprising:

  • display electrodes;

    a counter electrode provided opposite to said display electrodes with respect to a liquid crystal layer;

    a brightness setting section for setting display brightness;

    image signal generating means for generating an image signal whose polarity is inverted at a predetermined frequency;

    signal voltage applying means for applying to said display electrodes a signal voltage in accordance with the image signal; and

    counter electrode signal generating means for generating a counter electrode signal whose polarity is inverted in synchronism with the polarity inversion frequency of the image signal and for supplying the generated counter electrode signal to said counter electrode,wherein said counter electrode signal generating means includes an amplitude adjusting section for adjusting peak-to-peak amplitude of the counter electrode signal on the basis of a setting through said brightness setting section, andsaid image signal generating means includes;

    a level conversion section for converting level of the image signal in accordance with compensation characteristics which are determined on the basis of a reference value and compensate non-linearity of the transmittance index of liquid crystal to an applied voltage; and

    a reference value shifting section for shifting the reference value of the compensation characteristics as much as a variation of the counter electrode signal amplitude which is adjusted on the basis of the setting through said brightness setting section.

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