Patent ID: 6229512
Filing Date: 2001-05-08
Classification: G09G

Abstract:
A flat panel display unit, comprising:a display panel having a plurality of display scan lines, each including display pixels controlled by switching elements disposed in the vicinity of intersections of signal lines and scan lines;video outputting means for outputting a video signal to a video signal line, the polarity of which is inverted with respect to a reference voltage in correspondence to a horizontal scan period within each vertical scan period to a video signal line;at least a pair of sample and hold circuits corresponding to said signal line;sample and hold control means for alternately selecting a sampling and holding operation to one of said pair of sample and hold circuits and an outputting operation to the other one of said sample and hold circuits in each horizontal scan period, said sample and hold operation sampling a pixel signal voltage from the video signal at a predetermined timing, and said outputting operation outputting a sampled pixel signal voltage; anddisplay control means for controlling said sample and hold control means so as to stop the alternately selecting in accordance with non-displaying timing in the vertical scan period of the video signal and for controlling said video outputting means so as to stop to invert the polarity of said video signal in accordance with said non-displaying timing in the vertical scan period of the video signal,thereby, the polarity of the pixel signal voltage stored at least in said pair of sample and hold circuits being kept same within one vertical scan period.