Patent ID: 8013769

Claim:
A digital-to-analog converter (DAC) comprising: an analog gray voltage generation unit configured to generate a plurality of analog gray voltages; a first decoder configured to select two different voltages of the plurality of the gray voltages as a first level voltage and a second level voltage, respectively, in response to an upper K-bits of N-bit input image data, N being an integer not less than two, K being an integer less than N; a second decoder configured to repeatedly distribute the first level voltage and the second level voltage to output a plurality of distributed voltages in response to a lower L-bits of the N-bit input image data, L being equal to N subtracted by K, L being less than K; and an interpolated voltage generation unit configured to generate an interpolated voltage based on the plurality of distributed voltages and as an average of the plurality of distributed voltages, wherein the interpolated voltage generation unit includes: an amplifier; a capacitor unit connected to an input terminal of the amplifier; a first switching unit configured to selectively supply the plurality of distributed voltages to the capacitor unit; a second switching unit configured to selectively connect an output terminal of the amplifier with the input terminal of the amplifier; and a third switching unit configured to selectively connect the terminals of the capacitor unit and the output terminal of the amplifier.