Patent ID: 7671829

Claim:
A driving circuit for a color liquid crystal display comprising: a gradation power supply circuit for generating a plurality of red gradation voltages, a plurality of green gradation voltages and a plurality of blue gradation voltages used for independently applying a gamma compensation to a video red signal, a video green signal and a video blue signal in order to compensate said video red signal, said video green signal and said video blue signal so as to be suitable to a red transmittance characteristic, a green transmittance characteristic and a blue transmittance characteristic for an applied voltage in said color liquid crystal display, wherein said plurality of red gradation voltages, green gradation voltages and blue gradation voltages each comprises a first luminescence gamma compensation and a second gamma slight compensation of executing a compensation caused by a difference among a red characteristic, a green characteristic and a blue characteristic and for outputting a corresponding compensated digital video color signal; and a data electrode driving circuit for applying a data red signal, a data green signal and a data blue signal obtained by applying said gamma compensation to said red data, said green data and said blue data and by analog-converting said red data, said green data and said blue data based on said plurality of red gradation voltages, said plurality of green gradation voltages and said plurality of blue gradation voltages to corresponding data electrodes of said color liquid crystal display.