Pixel driving circuit and driving method thereof, display panel and display device

A method for driving a pixel driving circuit, the pixel driving circuit comprising:

• a driving sub-circuit, coupled to a light emitting element;
• a data writing sub-circuit, coupled to the driving sub-circuit and configured to receive a scanning signal, a reference voltage signal, and a data signal, and supply the reference voltage signal and the data signal to the driving sub-circuit successively under a control of the scanning signal;
• and a light emitting controlling sub-circuit, coupled to the data writing sub-circuit and the driving sub-circuit, and configured to receive a first controlling signal and a second controlling signal, and to control the driving sub-circuit to drive the light emitting element to emit light under a control of the first controlling signal and the second controlling signal,
• the method comprising:
• supplying the reference voltage signal to the driving sub-circuit under the control of the scanning signal and the first controlling signal, during an initialization phase;
• supplying the data signal, a threshold voltage of the driving transistor and a threshold voltage of the light emitting element to the driving sub-circuit, under the control of the scanning signal, during a compensation phase;
• and
• driving, by the drive sub-circuit, the light emitting element to emit light under the control of the first controlling signal and the second controlling signal, during a light emitting phase.