Patent ID: 6657610
Filing Date: 2003-12-02
Classification: G09G

Abstract:
A liquid crystal display device, comprising:a liquid crystal display panel including a first substrate having a plurality of groups of scanning electrodes, each group containing at least two scanning electrodes, a second substrate having a plurality of signal electrodes, and a liquid-crystal layer interposed between the first and second substrates; a control circuit that outputs command signals comprising a plurality of commands, one for each scanning electrode, indicative of which scanning electrodes are to be activated, outputs line information signals that respectively assign each of the to-be-activated scanning electrodes to a particular one of a plurality of scanning electrode lines, and outputs pulse control signals indicative of pulses to be applied to the scanning electrode lines during a particular time period; a scanning signal circuit that outputs a first group of scanning signals at substantially the same time during one time period to a first set of scanning electrodes, each of which is assigned to a different one of the scanning electrode lines, and outputs a second group of scanning signals at substantially the same time during another time period to a second set of scanning electrodes, each of which is assigned to a different one of the scanning electrode lines, in response to the command, line information and pulse control signals output by the control circuit; a data signal circuit that outputs data signals to the signal electrodes; a signal selection circuit having a plurality of registers, one for each scanning electrode, wherein each register receives and stores a corresponding command indicating whether or not the corresponding scanning electrode is to be activated; and a scroll circuit that controls the setting of the commands stored in the registers so that the scanning electrodes are selectively activated as time elapses to generated a screen scrolling pattern; wherein the scanning electrodes are selectively controlled and activated to generate one of plurality of display patterns during a particular time period irrespective of the grouping of the scanning electrodes.