Pixel driving device and method for driving pixel

A pixel driving device, comprising:

• a capacitance, comprising a first end and a second end;
• a reset circuit, coupled to the first end and the second end of the capacitance;
• a compensation circuit, coupled to the first end and the second end of the capacitance;
• a driving transistor, comprising a first end, a second end, and a control end, wherein the control end of the driving transistor is coupled to the first end of the capacitance;
• and
• a first transistor, comprising a first end, a second end, and a control end, wherein each of the first end and the second end of the first transistor is coupled between the second end of the driving transistor and the second end of the capacitance;
• wherein the reset circuit is configured to reset the first end of the capacitance to a power supply voltage, and reset the second end of the capacitance to a reference voltage according to a first sweep signal respectively in a first stage, wherein the compensation circuit is configured to write a data voltage into the first end of the capacitance via the driving transistor so that a voltage of the first end of the capacitance is at a first voltage, and the second end of the capacitance is maintained at the reference voltage according to a second sweep signal in a second stage, wherein the first transistor is configured to be turned on so as to generate a driving voltage difference between the first voltage of the first end of the capacitance and the reference voltage of the second end of the capacitance according to a control signal in a third stage, wherein the driving transistor is configured to output a driving current to a luminous element according to the driving voltage difference in the third stage.