Patent ID: 6501467
Filing Date: 2002-12-31
Classification: G09G

Abstract:
A liquid-crystal display panel drive power supply circuit comprising:a first power supply with a high potential, a second power supply with a potential that is lower than said first power supply potential, a plurality of voltage-dividing resistors provided in series between said first power supply and said second power supply, a plurality of voltage-follower configured amplifiers for introducing a plurality of differing voltages from connection points between said resistors to a liquid-crystal display panel, and capacitors connected between an output terminal of each of said amplifiers and said second power supply, a first of said amplifiers for outputting a first voltage that is used as a first power supply means, a second of said amplifiers for outputting a second voltage, and a third of said amplifiers for outputting a third voltage that is used as a second power supply means, wherein said first voltage is higher than said second voltage, said third voltage is lower than said second voltage, said first supply means is one potential supply means for said second amplifier that outputs a voltage less than said first voltage and greater than said third voltage, and said second power supply means is the other potential supply means for said second amplifier.