Patent ID: 6075507
Filing Date: 2000-06-13
Classification: G09G

Abstract:
An active matrix liquid display system comprising:a liquid display panel having a plurality of display pixels arranged in matrix form, a plurality of signal lines connected to the plurality of display pixels, a plurality of scanning lines for controlling writing on the plurality of display pixels, an active matrix substrate with a switching element for each of the plurality of display pixels, and a counter substrate at the counter surface where common electrodes are formed having a liquid layer placed between the counter substrate and the active matrix substrate;a signal line drive circuit connected to the plurality of signal lines;a scanning line drive circuit connected to the plurality of scanning lines;a data processing circuit supplying data to the signal line drive circuit;a timing generator circuit generating timing signals for the signal line drive circuit, the scanning line drive circuit and the data processing circuit; anda gradation power source section for generating gradation voltages for the plurality of signal lines, wherein the gradation power source section provides a pulsed positive side voltage and a pulsed negative side voltage connected to each other through a resistance ladder circuit to generate the gradation voltages, the pulsed positive side voltage and the pulsed negative side voltage being substantially 180 degrees out of phase with each other.