A method of driving a pixel driving circuit, the pixel driving circuit comprising:
- a driving circuit having a control terminal, a first terminal coupled to a first power supply and a second terminal coupled to a light emitting element, and configured to generate a driving current for driving the light emitting element under control of a potential at the control terminal of the driving circuit;
- an energy storage circuit having a first terminal coupled to the control terminal of the driving circuit, and a second terminal coupled to the second terminal of the driving circuit;
- a data and sensing line configured to input a data signal or output a sensing signal;
- a first initialization circuit coupled to a voltage supply terminal, the control terminal of the driving circuit and a first control line, and configured to provide a potential at the voltage supply terminal to the control terminal of the driving circuit under control of a potential at the first control line;
- a second initialization circuit coupled to the data and sensing line, the second terminal of the driving circuit and a second control line, and configured to provide a potential at the second terminal of the driving circuit as the sensing signal to the data and sensing line under control of a potential at the second control line;
- and
- a data writing circuit coupled to the data and sensing line, the control terminal of the driving circuit and a third control line, and configured to provide a data signal input at the data and sensing line to the control terminal of the driving circuit under control of a potential at the third control line;
- and
- the driving method comprising:
- in a display mode, writing, by the data writing circuit, the data signal input at the data and sensing line into the control terminal of the driving circuit under control of the potential at the third control line, and generating, by the driving circuit, the driving current for driving the light emitting element under control of the potential at the control terminal of the driving circuit;
- and
- in a sensing mode, providing, by the second initialization circuit, the potential at the second terminal of the driving circuit to the data and sensing line to be output as the sensing signal under control of the potential at the second control line,
- wherein in the sensing mode,
- during a sensing initialization phase, inputting, by the first initialization circuit, a reference voltage provided at the voltage supply terminal to the control terminal of the driving circuit under control of the potential at the third control line;
- and
- during a data output phase, generating, by the driving circuit, a sensing voltage at the second terminal of the driving circuit under control of the reference voltage and the first power supply, and providing, by the second initialization circuit, the sensing voltage generated at the second terminal of the driving circuit to the data and sensing line to be output as the sensing signal under control of the potential at the second control line.