Pixel driving circuit and driving method thereof, and display apparatus

A pixel driving circuit, comprising a turn-on voltage acquiring device, a compensation device, a light-emitting controller, a data writing device, a driving transistor and a light emitting device, wherein

• the turn-on voltage acquiring device is coupled to a first electrode and a second electrode of the light emitting device, and the compensation device, and is configured to generate a compensation signal according to a turn-on voltage under control of a first control signal provided by a first control signal line and a second control signal provided by a second control signal line, and to provide the compensation signal to the compensation device, the turn-on voltage is a voltage difference between the first electrode and the second electrode of the light emitting device when the light emitting device is in an on-state,
• the data writing device is coupled to a gate of the driving transistor, and is configured to provide a data voltage to the gate of the driving transistor under control of a third control signal provided by a third control signal line,
• the light-emitting controller is coupled to a first electrode of the driving transistor, and is configured to provide a first operating voltage to the first electrode of the driving transistor under control of a light-emitting control signal provided by a light-emitting control signal line,
• the compensation device is coupled to the gate of the driving transistor and the first electrode of the light emitting device, and is configured to generate a control signal according to the compensation signal, the data voltage and a threshold voltage of the driving transistor under the control of the third control signal provided by the third control signal line and a fourth control signal provided by a fourth control signal line, and to provide the control signal to the gate of the driving transistor,
• a second electrode of the driving transistor is coupled to the first electrode of the light emitting device, and is configured to output a driving current to the light emitting device to drive the light emitting device to emit light.