DISPLAY DRIVER AND SEMICONDUCTOR APPARATUS

A display driver includes: a plurality of decoders that converts a plurality of pixel data pieces representing luminance levels for pixels into gradation voltages having magnitudes corresponding to the luminance levels represented by the pixel data pieces, respectively; a plurality of amplifiers that provides a plurality of driving voltages obtained by amplifying the gradation voltages to a plurality of data lines of a display device, respectively; and a reference gradation voltage generator that generates a plurality of reference gradation voltages having respective different voltage values corresponding to gradation levels. Each of the decoders includes: a converting part that selects a reference gradation voltage corresponding to a luminance level represented by the pixel data piece from among the reference gradation voltages and then provides the selected reference gradation voltage to the amplifier via a first line as the gradation voltage; a voltage supply part that provides oneof the reference gradatio