Patent ID: 7956854

Claim:
A data line driver which drives a data line of a display panel, comprising: a positive polarity driving circuit configured to operate in a first voltage range between a reference voltage and a first voltage greater than said reference voltage to output to a first node, a positive polarity data signal with respect to said reference voltage; a negative polarity driving circuit configured to operate in a second voltage range between said reference voltage and a second voltage less than said reference voltage to output to a second node, a negative polarity data signal with respect to said reference voltage; a first collection switch provided between said first node and a first collection line; a second collection switch provided between said second node and a second collection line; and a changeover switch provided between said first and second nodes and between first and second output terminals, to operate in a third voltage range which is from said second voltage to said first voltage, wherein electric charges accumulated on said data line are transferred by controlling said first and second collection switches, wherein said changeover switch comprises: a first changeover switch provided between said first node and said first output terminal; a second changeover switch provided between said second node and said second output terminal; a third changeover switch provided between said first node and said second output terminal; and a fourth changeover switch provided between said second node and said first output terminal.