Display panel, display device and control method for display panel

1. A method for controlling a display panel, where the display panel comprises:

a plurality of pixel circuits, each of the plurality of pixel circuits includes a driving transistor, an energy storage unit, a data writing unit, a reset unit, a compensation unit and a light emitting unit, a first terminal of the driving transistor being used for receiving a power supply voltage, a control terminal of the driving transistor being connected to a first terminal of the energy storage unit and the data writing unit, respectively, a second terminal of the driving transistor being connected to a second terminal of the energy storage unit, the reset unit and a first terminal of the compensation unit, respectively, a second terminal of the compensation unit being connected to a first terminal of the light emitting unit, a second terminal of the light emitting unit being grounded, and control terminals of compensation units in the pixel circuits being connected together,

wherein the data writing unit comprises a second transistor, a first terminal of the second transitory is connected to the control terminal of the driving transistor, and a second terminal of the second transistor is connected to a data line, and

wherein the reset unit comprises a third transistor, a first terminal of the third transistor is connected to the second terminal of the driving transistor, and a second terminal of the third transistor is connected to a reset line,

wherein the method comprises:

controlling the compensation unit during a compensation period to disconnect the second terminal of the energy storage unit from the first terminal of the light emitting unit so that the light emitting unit in each of the pixel circuits is in an extinguished state, and

during the compensation period, controlling the second transistor and the third transistor to be a turn-on state, gradually increasing a voltage of the reset line from a low level signal to a compensation voltage, and controlling the second transistor and the third transistor to be a turn-off state to save the compensation voltage when the voltage of the reset line reaches the compensation voltage.

2. The method for controlling a display panel according to claim 1 , wherein the compensation unit comprises a first transistor, a first terminal of the first transistor being connected to the first terminal of the compensation unit, a second terminal of the first transistor being connected to the second terminal of the compensation unit, and a control terminal of the first transistor being connected to a control terminal of the compensation unit.

3. The method for controlling a display panel according to claim 1 , further comprising: controlling the compensation unit during a light emitting period to connect the second terminal of the energy storage unit to the first terminal of the light emitting unit, and controlling the data writing unit and the reset unit so as to control light emission of the light emitting unit.

4. The method for controlling a display panel according to claim 3 , wherein controlling the data writing unit and the reset unit so as to control light emission of the light emitting unit comprises:

firstly outputting a first control signal to the control terminal of the second transistor to bring the second transistor into a turn-on state, and outputting a second control signal to the control terminal of the third transistor to bring the third transistor into a turn-off state, so that a data signal of the data line is written to the first terminal of the energy storage unit, the first transistor is turned on, and the light emitting unit is in a light emitting state, and

further outputting a third control signal to the control terminal of the third transistor to bring the third transistor into a turn-on state, and outputting a fourth control signal to the control terminal of the second transistor to bring the second transistor into a turn-off state, so that the second terminal of the energy storage unit is reset to a low level signal, and the light emitting unit is in an extinguished state.

5. The method for controlling a display panel according to claim 4 , wherein the controlling the data writing unit and the reset unit so as to control light emission of the light emitting unit is performed in sequence for respective rows of pixel circuits of the plurality of pixel circuits before the compensation period begins.