Patent ID: 7277078
Filing Date: 2007-10-02
Classification: G09G

Abstract:
1. A display device comprising: a display part having a plurality of pixels; a plurality of video signal lines which apply a video signal voltage to the plurality of pixels; and a drive circuit which supplies the video signal voltage to the plurality of video signal lines, wherein the drive circuit includes: a) a storage circuit which stores display data inputted from the outside; b) a reference data generating circuit which generates reference data; c) a ramp voltage generating circuit which generates a ramp voltage; d) a plurality of comparing circuits which compare the display data stored in the storage circuit and the reference data generated by the reference data generating circuit, and e) a plurality of sampling circuits which sample the ramp voltage generated by the ramp voltage generating circuit based on a result of comparison of the comparing circuits and output the sampled ramp voltage as a video signal voltage to respective video signal lines, wherein the reference data generated by the reference data generating circuit is changed non-linearly with respect to time, and wherein the reference data generating circuit includes: a selection circuit to which a plurality of clocks which have different frequencies from each other are inputted and selects one clock out of the plurality of clocks in response to a selection control signal; a counter which counts the clock selected by the selection circuit and outputs the number of counts as the reference data; and a control part which transmits the selection control signal which indicates the clock to be selected by the selection circuit in response to a preset number of counts and the number of counts of the counter.