Patent ID: 7463229
Filing Date: 2008-12-09
Classification: G09G

Abstract:
1. A display driver that drives a data line of a display panel, the display driver comprising: a data line driver circuit that drives an output line connected with the data line based on a drive voltage corresponding to display data; a first switching element connected between a first power supply line and the output line, a first power supply voltage being supplied to the first power supply line; a second switching element connected between a second power supply line and the output line, a second power supply voltage is supplied to the second power supply line; and a switch control circuit that controls the first and second switching elements, the switch control circuit electrically connecting the output line with the first power supply line in a first period by setting the first switching element to an on-state and setting the second switching element to an off-state, electrically connecting the output line with the second power supply line in a second period after the first period by setting the first switching element to an off-state and setting the second switching element to an on-state, and setting the first and second switching elements to an off-state after the second period, the second period being provided immediately after the first period, or the second period being provided when a given period of time has elapsed after the first period, during the given period the first and second switching elements being set to an off-state, the data line driver circuit driving the output line in a third period after the second period, and the first period, the second period and the third period being in sequence within a horizontal scanning period.