The present invention provides a pixel circuit and a driving method therefor, a display panel and a display apparatus, the pixel circuit comprises a data write device, a liquid crystal capacitor, a power supply device and a control signal output device, the data write device writes a data voltage of a data line to a first terminal of the liquid crystal capacitor in a normal display stage; the control signal output device acquires the data voltage and generates a corresponding charge control signal in accordance with the acquired data voltage in the normal display stage, and transmits the charge control signal to the power supply device in a static display stage; the power supply device charges the liquid crystal capacitor in accordance with the charge control signal, till the voltage difference between the first terminal and the second terminal of the liquid crystal capacitor becomes Vdata−Vcom.