Patent ID: 6556192
Filing Date: 2003-04-29
Classification: G09G

Abstract:
A driving portion of a liquid crystal display device, comprising:a data-line driving circuit; a gate-line driving circuit; an interface outputting data signals; a liquid crystal display controller receiving the data signals and outputting display data signals to the data-line driving circuit and timing signals to the gate-line driving circuit; a DC/DC converter supplying a plurality of output power source voltages to the gate-line driving circuit and the data-line driving circuit; a voltage detector detecting a voltage level of one of the output power source voltages supplied by the DC/DC converter and outputting a feedback signal; and an interface controller receiving the feedback signal from the voltage detector, outputting enable signals to the interface and to the DC/DC converter, and outputting a control signal to advance the data signals when the detected voltage level of the one output power source voltage is less than 90% of a preset voltage level.