Patent ID: 8094113
Filing Date: 2012-01-10
Classification: G09G

Abstract:
1. A data line driving circuit which supplies an analog image signal to 4×M data lines, where M is a natural number, the circuit comprising: M positive driving circuits configured to output a positive analog image signal which is positive with respect to a reference voltage; M negative driving circuits configured to output a negative analog image signal which is negative with respect to said reference voltage; 4×M analog image signal output terminals; and a switching circuit connected with said 4×M data lines through said 4×M analog image signal output terminals, wherein said switching circuit switches between a first state in which said positive analog image signal is supplied to said data lines, a second state in which said negative analog image signal is supplied to said data lines, and a third state as a high impedance state in which no signal is supplied to said data lines, wherein said switching circuit comprises: a first buffer circuit connected with said positive driving circuits; a second buffer circuit connected with said negative driving circuits; a first switch group provided between said first buffer circuit and said analog image signal output terminals to control a connection between said first buffer circuit and said analog image signal output terminals, said first switch group configured to selectively control a connection between said first buffer circuit and said positive driving circuits; and a second switch group provided between said second buffer circuit and said analog image signal output terminals to control a connection between said second buffer circuit and said analog image signal output terminals, said second switch group configured to selectively control connection between said second buffer circuit and said negative driving circuits, and said switching circuit supplies said positive analog image signal and said negative analog image signal to said 4×M data lines by closing said first switch group and said second switch group in a predetermined order.