Patent ID: 6950045

Claim:
A gamma correction digital-to-analog converter comprising: a first digital-to-analog conversion circuit configured to select one from a plurality of first gamma correction reference voltage signals as a first corresponding gray scale signal based on lower m+n bits of a k bit digital input signal when upper l bits of the k bit digital input signal correspond to an upper or lower code set, wherein k is equal to l+m+n, and k, l, m and n are integers; a second digital-to-analog conversion circuit configured to select a pair of adjacent second gamma correction reference voltage signals from a plurality of second gamma correction reference voltage signals based on upper l+m bits when the upper l bits correspond to a middle code set, and configured to select one from the pair of second gamma correction reference voltage signals and 2 n −1 divided signals as a second corresponding gray scale signal, the divided signals being obtained by dividing an interval between the selected pair of second gamma correction reference voltage signals into 2 n levels; and an output selection circuit configured to select one from the selected first and second gray scale signals to be output.