Pixel structure and forming method and driving method thereof

A method for driving a pixel structure, the pixel structure disposed on a first substrate and electrically coupled to at least one scan line and at least one data line, wherein the pixel structure has a first switch device and a second switch device, at least one pixel electrode, at least one control electrode, and at least one coupling electrode, wherein each of the first switch device and the second switch device has a gate electrode, a source electrode and a drain electrode, and the gate electrodes of the first and second switch devices and the source electrodes of the first and second switch devices electrically coupled to the corresponding scan line and the corresponding data line, respectively, the method comprising:

• turning on the first switch device and the second switch device simultaneously, providing a voltage corresponding to a displaying data to the pixel electrode via the second switch device and the control electrode via the first switch device, wherein the pixel electrode directly receives the voltage from the second switch device and not receives the voltage from the first switch device, but the control electrode directly receives the voltage from the first switch device and not receives the voltage from the second switch device, such that the pixel electrode and the control electrode are at a floating connection state;
• providing a first coupling voltage to the coupling electrode;
• coupling a variation of the first coupling voltage to the control electrode via at least one coupling capacitor, such that an absolute value of a voltage difference between the control electrode and a common electrode substantially is greater than an absolute value of a voltage difference between the pixel electrode and the common electrode.