Display panels and driving methods thereof

A driving method of a display panel, the display panel comprising a plurality of pixel driving circuits, and each of the pixel driving circuits comprising:

• a light-emitting element, connected between a first power supply line and a second power supply line to form a light-emitting loop;
• a driving transistor, configured to control a driving current flowing through the light-emitting element, and comprising:
• a gate;
• and
• a source and a drain, connected in series in the light-emitting loop;
• a data writing transistor, configured to write a data signal provided by a data line into the gate of the driving transistor in response to a first scanning signal provided by a first scanning line to turn on the light-emitting loop, and data writing transistor comprising:
• a gate, connected to the first scanning line;
• a first electrode, connected to the data line;
• and
• a second electrode, connected to the gate of the driving transistor;
• and
• a reset transistor, configured to reset a potential of the gate of the driving transistor in response to a second scanning signal provided by a second scanning line and a reset voltage provided by a voltage line to turn off the light-emitting loop, and the reset transistor comprising:
• a gate, connected to a second scanning line;
• a first electrode, connected to the voltage line;
• and
• a second electrode, connected to the gate of the driving transistor;
• wherein the driving method comprises:
• obtaining to-be-displayed grayscales of a frame of to-be-displayed image, wherein the frame of to-be-displayed image comprises at least one first subframe and at least one second subframe;
• determining a target driving mode of each of the pixel driving circuits according to the to-be-displayed grayscales, wherein the target driving mode comprises a first driving mode and a second driving mode;
• and
• when the target driving mode is the first driving mode, adjusting a time interval between an effective level of the first scanning signal and an effective level of the second scanning signal in the second subframe, so as to control a conduction duration of the light-emitting loop, wherein the first scanning signal comprises at least one effective level in both the first subframe and the second subframe, and the second scanning signal comprises the effective level between the first subframe and the second subframe.

A driving method of a display panel, the display panel comprising a plurality of pixel driving circuits, and each of the pixel driving circuits comprising:

• a light-emitting element, connected between a first power supply line and a second power supply line to form a light-emitting loop;
• a driving transistor, configured to control a driving current flowing through the light-emitting element, and comprising:
• a gate;
• and
• a source and a drain, connected in series in the light-emitting loop;
• a data writing transistor, configured to write a data signal provided by a data line into the gate of the driving transistor in response to a first scanning signal provided by a first scanning line to turn on the light-emitting loop, and data writing transistor comprising:
• a gate, connected to the first scanning line;
• a first electrode, connected to the data line;
• and
• a second electrode, connected to the gate of the driving transistor;
• and
• a reset transistor, configured to reset a potential of the gate of the driving transistor in response to a second scanning signal provided by a second scanning line and a reset voltage provided by a voltage line to turn off the light-emitting loop, and the reset transistor comprising:
• a gate, connected to a second scanning line;
• a first electrode, connected to the voltage line;
• and
• a second electrode, connected to the gate of the driving transistor;
• wherein the driving method comprises:
• dividing the frame of to-be-displayed image into a plurality of subframes, wherein a period of each of the subframes is equal;
• driving odd-numbered subframes of the plurality of subframes by a pulse width modulation mode;
• and
• driving even-numbered subframes of the plurality of subframes by a pulse amplitude modulation mode.