Compensation method for pixel circuit, pixel circuit, and display device

A compensation method for pixel circuit, wherein the pixel circuit comprises a data writing circuit, a driving circuit, a sensing circuit, and an energy storage circuit, the data writing circuit is coupled, at a first node, to a first terminal of the driving circuit and a first terminal of the energy storage circuit, the sensing circuit is coupled, at a second node, to a second terminal of the driving circuit and a second terminal of the energy storage circuit, the compensation method comprising:

• in a charging stage, acquiring a voltage of the second node by the sensing circuit, adjusting a data voltage outputted by the data writing circuit to the first node based on the acquired voltage of the second node, and charging the energy storage circuit by using the adjusted data voltage;
• and
• in a compensation stage, compensating characteristic parameters of the driving circuit by the charged energy storage circuit,
• wherein the charging stage comprises a measurement charging cycle;
• and the step of acquiring a voltage of the second node by the sensing circuit, adjusting the data voltage outputted by the data writing circuit to the first node based on the acquired voltage of the second node comprises:
• in the measurement charging cycle, outputting a predetermined data voltage to the first node by the data writing circuit, and acquiring the voltage of the second node by the sensing circuit;
• and
• determining a measurement charging slope based on the measurement charging cycle and the acquired voltage of the second node, and obtaining the adjusted data voltage according to the determined measurement charging slope.