Patent ID: 6831622
Filing Date: 2004-12-14
Classification: G02F,G09G

Abstract:
A driving circuit for driving an electro-optical panel having a transistor and a pixel electrode at each intersection of each of a plurality of scanning lines and each of a plurality of data lines, comprising:a scanning line driving circuit which selects a scanning line of the plurality of scanning lines to supply a transistor corresponding to the selected scanning line with a signal to turn on the transistor; a data line driving circuit which generates a shift pulse to elect a data line of the plurality of data lines within a duration during which the scanning line is selected, and limits the pulse width of the shift pulse to the pulse width of an enable pulse narrower than the shift pulse width and outputs the shift pulse with the narrow pulse width as a sampling signal; a sampling circuit which samples a video signal within the pulse duration of the sampling signal and feeds the sampled signal to at least one data line; a dummy circuit which is arranged adjacent to the sampling circuit and the data line driving circuit, and outputs a phase difference signal representing a phase difference between a monitor signal supplied in synchronization with the video signal and a reference pulse supplied in synchronization with the enable pulse; and an enable pulse adjustment circuit which adjusts the phase of the enable pulse so that the phase of the enable pulse leads with respect to the video signal when the phase difference signal indicates that the reference pulse lags the monitor signal in phase, or so that the phase of the enable pulse lags with respect to the video signal when the phase difference signal indicates that the reference pulse leads the monitor signal in phase.