Patent ID: 7385580
Filing Date: 2008-06-10
Classification: G09G

Abstract:
1. An active matrix display device including a display panel with pixels, a common electrode to which a common electrode voltage is applied, and a source electrode to which a source electrode voltage is applied, in which the common electrode and the source electrode are disposed so as to sandwich the display panel therebetween, and having a plurality of display modes, the active matrix display device comprising: storage means for storing values of optimum applied voltages, each of which voltages is applied to an electrode having a shiftable voltage waveform, so as to match a center of a voltage waveform of the common electrode voltage with a center of a voltage waveform of the source electrode voltage in each of the display modes; and voltage applying means for reading out the value of the optimum applied voltage corresponding to the display mode from the storage means and applying the optimum applied voltage to shift the voltage waveform of the electrode, and wherein each pixel has a switching element for switching ON and OFF application to the pixel of the source electrode voltage, in which a value of the source electrode voltage is set to a value which compensates a variation of the source electrode voltage due to parasitic capacitance of the switching element when the switching element is OFF, and the storage means, which are connected to a common electrode drive circuit, are for storing a plurality of values of the optimum applied voltages for shifting a voltage waveform of a voltage applied to the common electrode, respectively for the display modes.