Displaying device, its driving circuit and its driving method

A drive circuit for an active matrix-type display device including a plurality of video signal lines for respectively transmitting a plurality of video signals representing an image to be displayed;

• a plurality of scanning signal lines crossing the video signal lines;
• and a plurality of pixel formation portions arranged in a matrix in association with intersections of the video signal lines and the scanning signal lines, the circuit comprising:
• a video signal line drive circuit configured to supply the video signals to the video signal lines over a plurality of horizontal scanning periods such that video signals being applied to adjacent video signal lines have different polarities, and the video signal line drive circuit is configured such that the polarity of each video signal is inverted periodically at an interval of time equal to multiple horizontal scanning periods, from among the plurality of horizontal scanning periods within each frame period;
• a scanning signal line drive circuit configured to sequentially select the scanning signal lines per a predetermined horizontal scanning period, from among the plurality of horizontal scanning periods, within each frame period;
• and
• an adjacent video signal line short-circuit portion configured to short-circuit the adjacent video signal lines for a preset charge-sharing period from the start of each of the plurality of horizontal scanning periods,
• wherein the drive circuit is configured such that a second charge-sharing period, which is the charge-sharing period within a first horizontal scanning period is longer in time than a first charge-sharing period, which is the charge-sharing period within a second horizontal scanning period,
• wherein the first horizontal scanning period is a horizontal scanning period from among the plurality of horizontal scanning periods in which the polarity of each video signal is the same as that in one horizontal scanning period previous to the first horizontal scanning period in the plurality of horizontal scanning periods, and the second horizontal scanning period is a horizontal scanning period from among the plurality of horizontal scanning periods in which the polarity of each video signal is different from that in one horizontal scanning period previous to the second horizontal scanning period in the plurality of horizontal scanning periods.

A drive method for an active matrix-type display device including a plurality of video signal lines for respectively transmitting a plurality of video signals representing an image to be displayed;

• a plurality of scanning signal lines crossing the video signal lines;
• and a plurality of pixel formation portions arranged in a matrix in association with intersections of the video signal lines and the scanning signal lines, the method comprising:
• a video signal line drive step of supplying the video signals to the video signal lines over a plurality of horizontal scanning periods such that video signals being applied to adjacent video signal lines have different polarities, and the polarity of each video signal is inverted periodically at an interval of time equal to multiple horizontal scanning periods, from among the plurality of horizontal scanning periods within each frame period;
• a scanning signal line drive step of sequentially selecting the scanning signal lines per a predetermined horizontal scanning period, from among the plurality of horizontal scanning periods, within each frame period;
• and
• an adjacent video signal line short-circuit step of short-circuiting the adjacent video signal lines for a preset charge-sharing period from the start of each of the plurality of horizontal scanning periods,
• wherein a second charge-sharing period, which is the charge-sharing period within a first horizontal scanning period is longer in time than a first charge-sharing period, which is the charge-sharing period within a second horizontal scanning period,
• wherein the first horizontal scanning period is a horizontal scanning period from among the plurality of horizontal scanning periods in which the polarity of each video signal is the same as that in one horizontal scanning period previous to the first horizontal scanning period in the plurality of horizontal scanning periods, and the second horizontal scanning period is a horizontal scanning period from among the plurality of horizontal scanning periods in which the polarity of each video signal is different from that in one horizontal scanning period previous to the second horizontal scanning period in the plurality of horizontal scanning periods.