Common voltage driving compensation unit, method and display panel using the same

A common voltage driving compensation unit, comprising:

• an operational amplifier, including an in-phase input terminal, a reverse-phase input terminal and a first output terminal, wherein the in-phase input terminal is inputted a common voltage, the reverse-phase input terminal is inputted a feedback voltage, a plurality of parallel connected paths are provided between the reverse-phase input terminal and the first output terminal, and each path including an analog switch and a resistor;
• and
• a controller, configured to count a gate driving clock signal based on the frame start signal, and to output corresponding control signals based on a count value of the gate driving clock signal, to control on and off of the analog switch on respective paths, so as to amplify the common voltage with a corresponding amplification ratio,
• wherein the display area is divided into a plurality of areas based on a distance between the common voltage driving compensation unit and a source driver, and a plurality of value ranges of the count value of the gate driving clock signal are established to correspond to respective areas of the plurality of areas divided in the display area, so that the control signals are based on which of the plurality of value ranges that the count value of the gate driving clock signal belongs.