Patent ID: 8325075
Filing Date: 2012-12-04
Classification: H03M

Abstract:
1. A digital-to-analog converter of a data driver, comprising: a decoder configured to output a first level voltage and a second level voltage in response to input image data of upper K bits (K is a natural number less than N) among input image data of N bits (N is a natural number equal to or greater than 2); a delta current generation section configured to receive the first level voltage and the second level voltage and generate two currents; two transmission lines configured to transmit the two currents generated by the delta current generation section; a current digital-to-analog conversion section configured to divide one current of the two currents generated by the delta current generation section, in response to input image data of 2 least significant bits among remaining lower L bits (L=N−K); an output buffer amplification section configured to be applied with the other current of the two currents generated by the delta current generation section and a current outputted from the current digital-to-analog conversion section and generate an output voltage; a switch section configured to control currents of the transmission lines depending upon input information; and two multipliers configured to control transmission paths of the two currents generated by the delta current generation section.