Patent ID: 7936295
Filing Date: 2011-05-03
Classification: G09G,H03M

Abstract:
1. A digital/analog converter circuit for generating an output voltage having a voltage value corresponding to a digital value of n bits of digital data where n is a natural number and supplying the output voltage to a load capacitance as an object to be driven, the digital/analog converter circuit comprising: a step voltage generation section for generating a plurality of step voltages corresponding to different digital values of (n−m) bits of digital data where m is a natural number and smaller than n, each of the plurality of step voltages having a voltage value changing stepwise; a selection section for selecting a step voltage, among the plurality of step voltages generated by the step voltage generation section corresponding to the digital value of (n−m) most significant bits of the digital data; an amplifier section for amplifying the step voltage selected by the selection section; and an output section for supplying the step voltage amplified by the amplifier section as the output voltage for a time period corresponding to the digital value of m least significant bits of the digital data, wherein for each of the plurality of step voltages, different digital values of m bits are allocated to different steps of the step voltage.