Patent ID: 7528826
Filing Date: 2009-05-05
Classification: G09G

Abstract:
1. A driving circuit for driving a display panel, wherein the display panel includes a plurality of cells arranged in rows, comprising: a gate electrode driving circuit to provide a gate voltage for driving a row of the cells; a common electrode driving circuit to provide a common voltage to a common electrode of the row of cells, the common electrode driving circuit including: a first buffer to provide a first level of the common voltage; a second buffer to provide a second level of the common voltage; a first switch to selectively couple the first buffer to an external capacitor; a second switch to selectively couple the second buffer to the external capacitor; and wherein only one of the first and second switches is turned ON to couple one of the first and second buffers to the external capacitor; and wherein the external capacitor is coupled between the gate electrode driving circuit and the common electrode driving circuit, and is charged by a potential difference between the common voltage and the gate voltage.