Patent ID: 7375725
Filing Date: 2008-05-20
Classification: G09G

Abstract:
1. A display device comprising: a display part having a plurality of pixels; a plurality of video lines which supply a video signal voltage to the plurality of pixels; and a drive circuit which supplies the video signal voltage to the plurality of video lines, wherein the display part includes common electrodes, the drive circuit includes: a common voltage generating circuit which selectively outputs a high-potential-side common voltage or a low-potential-side common voltage to the common electrodes in response to an alternating signal; a storage circuit which stores display data; a reference data generating circuit which generates reference data; a ramp voltage generating circuit which generates a ramp voltage; a plurality of comparing circuits which compare data stored in the storage circuit and the reference data generated by the reference data generating circuit; and a plurality of sampling circuits which sample the ramp voltage generated by the ramp voltage generating circuit in response to comparison results of the comparing circuits and output the sampled ramp voltage as a video signal voltage to respective video lines, wherein the reference data generated by the reference data generating circuit is changed non-linearly with respect to time.