Patent ID: 7193602
Filing Date: 2007-03-20
Classification: G09G

Abstract:
1. A driver circuit for driving an electro-optical device which has: first to ith scan lines (i is an integer of two or more); first to ith color component signal lines; first to ith switching elements, each of which is connected to a jth scan line (1≦j≦i, j is an integer) and a jth color component signal line and is controlled by a jth select signal supplied to the jth scan line; first to ith pixel electrodes, each of which is connected to a jth switching element; and first to ith demultiplex switching elements, each of which is connected to the jth color component signal line at one end and to a signal line at the other end, and is controlled by a jth demultiplex control signal, multiplexed first to ith color component signals being output to the signal line, the driver circuit comprising a select signal generation circuit which generates first to ith select signals, the first to ith select signals controlling the first to ith switching elements based on first to ith demultiplex control signals respectively, wherein the select signal generation circuit generates the jth select signal so that at least the jth switching element is in an ON state when a jth demultiplex switching element shifts from an ON state to an OFF state and that the jth switching element is set to an OFF state before the jth demultiplex switching element is set to the ON state again after the jth demultiplex switching element has shifted to the OFF state, wherein the select signal generation circuit includes first to ith flip-flops, each of which outputs the jth select signal, and wherein, in a case where the first to ith demultiplex control signals cyclically go active in order from the first to ith demultiplex control signals, a jth flip-flop outputs the jth select signal which is set by the jth demultiplex control signal and reset by one of the first to ith demultiplex control signals other than the jth demultiplex control signal.