Patent ID: 8125475

Claim:
A data driver generating a data signal to drive a flat panel display, the data driver comprising: a holding latch for receiving data for the data driver and for receiving a control signal, the holding latch storing the data and outputting a counting signal that is generated according to the value of the data, the holding latch comprising: a plurality of logic units, each of the logic units including an input terminal, an output terminal and an inversion output terminal, each of the logic units receiving a bit value of the data through the input terminal; and a first-first switch coupled between an inversion output terminal of a first one of the logic units and an input terminal of a second one of the logic units, the first-first switch being turned on if the control signal includes a first polarity; and a digital-analog converter for receiving a ramp pulse and the counting signal, the digital-analog converter determining a voltage level of the data signal from the ramp pulse during a period for which the counting signal is supplied.