Patent ID: 7084852

Claim:
A liquid crystal panel driving device for a liquid crystal display device comprising source lines, pixel switches, pixel electrodes connected to the source lines through the pixel switches, and an opposing electrode opposed to the pixel electrodes, the liquid crystal panel driving device alternately applying to the pixel electrodes through the source lines high voltages and low voltages that are respectively higher and lower than a predetermined voltage, both of the voltages corresponding to image data for pixels, the liquid crystal panel driving device comprising: a charge-storing means for storing an electric charge; a charge-storing means-connecting means for connecting and disconnecting the source lines and the storing means; an opposing electrode-connecting means for connecting and disconnecting the source lines and the opposing electrode; and a controlling means for controlling the charge-storing means-connecting means and the opposing electrode-connecting means such that, after applying one of the high voltage and the low voltage to a set of the pixel electrodes but before applying the other one of the voltages to a subsequent set of the pixel electrodes, the source lines are connected to the electric charge-storing means and subsequently the source lines are connected to the opposing electrode, wherein the charge-storing means comprises a first charge-storing means and a second charge-storing means; the charge-storing means-connecting means comprises a first charge-storing means connecting-means for connecting and disconnecting the first charge-storing means, and a second charge-storing means-connecting means for connecting and disconnecting the second electric charge-storing means; and the charge-storing means-connecting means further comprises a mutually-connecting means for mutually connecting and disconnecting the first charge-storing means and the second charge-storing means; and the controlling means controls the first charge-storing means-connecting means, the second charge-storing means-connecting means, and the mutually-connecting means such that, after applying the high voltages to a previous set of the pixel electrodes but before applying the low voltages to a subsequent set of the pixel electrodes, the source lines are connected to the first electric charge-storing means at first timing and thereafter the source lines are connected to the opposing electrode at second timing, and after applying the low voltages to the subsequent set of the pixel electrodes but before applying the high voltages to a further subsequent set of the pixel electrodes, the source lines are connected to the second electric charge-storing means at third timing and thereafter the source lines are connected to the opposing electrode at fourth timing, and the first electric charge-storing means and the second electric charge-storing means are mutually connected at fifth timing that is later than the first timing or the third timing.