Patent ID: 6215463
Filing Date: 2001-04-10
Classification: G09G

Abstract:
A driving system for a display panel having a plurality of row electrodes, a plurality of column electrodes intersecting with the row electrodes, comprising:a data voltage source circuit having a voltage source for supplying a voltage of about one half of a maximum voltage for driving the column electrode, a diode provided between the voltage source and an output terminal, a first switch connected to the voltage source at an end thereof, a second switch connected to another end of the first switch at an end thereof, and to a ground at the other end, and a voltage adding capacitor provided between a junction of the first and second switches and the output terminal;a column driver for driving the column electrodes,the column driver having an input terminal connected to the output terminal of the data voltage source circuit, a plurality of output terminals connected to the column electrodes, a third switch provided between the input terminal and each of the output terminals, a fourth switch provided between each of the output terminals and a ground,control circuit means for producing control signals for controlling the first to fourth switches.