Patent ID: 6661402
Filing Date: 2003-12-09
Classification: G09G

Abstract:
The LCD comprising:a liquid crystal panel having data lines, scan lines, and pixels arranged in a matrix; a scanning circuit selecting scan lines to which a voltage is to be applied; and a data driver circuit providing a liquid crystal application voltage corresponding to display data to said data lines of said liquid crystal panel, said data driver circuit comprising: a positive-polarity DAC circuit generating a positive-polarity liquid crystal application voltage corresponding to said display data; a negative-polarity DAC circuit generating a negative-polarity liquid crystal application voltage corresponding to said display data; a positive-polarity amplifier circuit amplifying said positive-polarity liquid crystal application voltage at an amplification factor higher than one; and a negative-polarity amplifier circuit amplifying said negative-polarity liquid crystal application voltage at an amplification factor higher than one, wherein said data driver circuit switches between conditions based on a value of the display data, one of said conditions being such that both a driving voltage higher than the liquid crystal application voltage and the liquid crystal application voltage corresponding to the display data are output when the alternately switching polarity is positive and the other being such that both a driving voltage lower than the liquid crystal application voltage and the liquid crystal application voltage corresponding to the display data are output when the alternately switching polarity negative.