Patent ID: 8130218
Filing Date: 2012-03-06
Classification: G09G

Abstract:
1. An electronic device of a source driver in an LCD device, for enhancing accuracy of voltage outputted to an equivalent capacitor of a panel of the LCD device comprising: a first node; a second node; an output unit coupled to the source driver and the equivalent capacitor, for outputting an analog signal according to the signal generated by the source driver; a first charge sharing switch comprising a first terminal coupled to the output unit and the equivalent capacitor and a second terminal coupled to the first node, for controlling the connection between the first terminal of the first charge sharing switch and the second terminal of the first charge sharing switch according to a first control signal; a second charge sharing switch comprising a first terminal coupled to the output unit and the equivalent capacitor and a second terminal coupled to the second node, for controlling the connection between the first terminal of the second charging sharing switch and the second terminal of the second charging sharing switch according to a second control signal; a first precharge switch comprising a first terminal coupled to the first node and a second terminal coupled to a first voltage generator, for controlling the connection between the first terminal of the first precharge switch and the second terminal of the first precharge switch according to a third control signal; and a second precharge switch comprising a first terminal coupled to the second node and a second terminal coupled to a second voltage generator, for controlling the connection between the first terminal of the second precharge switch and the second terminal of the second precharge switch according to a fourth control signal; wherein the equivalent capacitor performs charge sharing by providing a shared charge to the first and second nodes when the first and second charge sharing switches are turned on and the first and the second precharge switches are turned off.