Patent ID: 7545305

Claim:
A data driver comprising: a positive-polarity amplifier including: a first input stage that receives at least one voltage selected from among a plurality of positive-polarity reference voltages; and a first output stage that receives an output of said first input stage, performs amplification, and outputs a voltage to a first amplifier output terminal; a negative-polarity amplifier including: a second input stage that receives at least one voltage selected from among a plurality of negative-polarity reference voltages; and a second output stage that receives an output of said second input stage, performs amplification, and outputs a voltage to a second amplifier output terminal; and an output switch circuit that performs switching between straight connection of said first and second amplifier output terminals to first and second driver output terminals, respectively and cross connection of said first and second amplifier output terminals to said second and first driver output terminals, respectively, responsive to a control signal; said data driver being supplied with a plurality of voltage supplies including a high-potential voltage supply, a low-potential voltage supply, and an intermediate-potential voltage supply having a potential intermediate between the high-potential voltage supply and the low-potential voltage supply; wherein the high-potential voltage supply and the low-potential voltage supply are provided to said first input stage in said positive-polarity amplifier; the high-potential voltage supply and the intermediate-potential voltage supply are provided to said first output stage in said positive-polarity amplifier; the high-potential voltage supply and the low-potential voltage supply are provided to said second input stage in said negative-polarity amplifier; and the intermediate-potential voltage supply and the low-potential voltage supply are provided to said second output stage in said negative-polarity amplifier.