Patent ID: 8723851

Claim:
A data driver of a flat panel display comprising: an output driver configured to output a plurality of amplified data signals for a plurality of channels corresponding to a plurality of data lines, the plurality of channels comprising: a plurality of amplifiers configured to amplify a plurality of input data signals and to supply the amplified data signals to the data lines; and a plurality of chopping controllers, each of the chopping controllers being coupled to a plurality of input terminals of a corresponding amplifier of the amplifiers and configured to receive a first control signal or a second control signal to periodically change signals applied to positive and negative input terminals from among the input terminals of the amplifiers, wherein each of the chopping controllers comprises: a first switch coupled between the positive input terminal of the corresponding amplifier and an input line configured to supply a first data signal of the input data signals; a second switch coupled between the positive input terminal of the corresponding amplifier and a feedback line configured to feed back and apply a second data signal of the amplified data signals; a third switch coupled between the negative input terminal of the corresponding amplifier and the feedback line; and a fourth switch coupled between the negative input terminal and the input line, and wherein a first plurality of the amplifiers is configured to supply a first plurality of the amplified data signals in a first polarity whenever the first control signal is supplied at a first level and to supply the first plurality of the amplified data signals in a second polarity whenever the first control signal is supplied at a second level, the first polarity being different from the second polarity and the first level being different from the second level.