Patent ID: 7671830
Filing Date: 2010-03-02
Classification: G09G,H04M

Abstract:
1. A display device that displays an image corresponding to a display signal, the display device comprising: a first display panel having display pixels and a first common electrode that is set to a common electric potential for each display pixel, each display pixel being situated near an intersecting point of a scanning line and a signal line; a second display panel having display pixels and a second common electrode that is set to a common electric potential for each display pixel and is separated from the first common electrode, each display pixel being situated near an intersecting point of a scanning line and a signal line; a scan driver section that, in each image frame, sets each scanning line of the first display panel in a selected state in a predetermined sequence and sets each scanning line of the second display panel in the selected state in a predetermined sequence; a first common electrode driver section that applies either of two different voltage levels to the first common electrode; a second common electrode driver section that applies either of two different voltage levels to the second common electrode; and a control section which controls the scan driver section so that a display panel in which a scanning line is set in the selected state switches between the first display panel and the second display panel a plurality of times within one frame, and which controls the second common electrode driver section so that a voltage level applied to the second common electrode switches at a predetermined timing whenever any of the scanning lines of the second display panel is set in the selected state and so that a voltage level that is switched at the predetermined timing is maintained on the second common electrode until a next time of the predetermined timing; wherein the control section controls the first common electrode driver section so that a voltage level applied to the first common electrode switches based on a switch timing of the scanning lines selected in the first display panel and a switch timing of the voltage level applied to the second common electrode, and so that in each frame cumulative application times of the two different voltage levels to the first common electrode are equal.