Pixel driving circuit, display panel and driving method thereof, and display device

A display panel, comprising a light-emitting element and a pixel driving circuit, wherein the pixel driving circuit is electrically connected to the light-emitting element for driving the light-emitting element to emit light,

• wherein the pixel driving circuit comprises a pulse width modulation module, the pulse width modulation module comprises a sweep signal terminal, and the pulse width modulation module is configured to control light emission duration of the light-emitting element;
• a sweep signal line, the sweep signal line is electrically connected to the sweep signal terminal and is configured to provide a sweep signal for the pulse width modulation module;
• and
• at least one of following manners is provided:
• durations of sweep signals provided by at least two of sweep signal lines are different;
• or,
• rates of change of sweep signals are different.

A display panel, comprising a light-emitting element and a pixel driving circuit, wherein the pixel driving circuit is electrically connected to the light-emitting element for driving the light-emitting element to emit light;

• wherein the pixel driving circuit comprises a pulse width modulation module and a data signal terminal, the pulse width modulation module comprises a sweep signal terminal;
• wherein the pulse width modulation module further comprises a first transistor and a second transistor, a first terminal of the first transistor is electrically connected to a fixed potential terminal, a control terminal of the first transistor is electrically connected to a first scan terminal, a second terminal of the first transistor is electrically connected to the sweep signal terminal, a first terminal of the second transistor is electrically connected to the data signal terminal, a second terminal of the second transistor is electrically connected to the sweep signal terminal, and a control terminal of the second transistor is electrically connected to a second scan terminal;
• and
• an operation of the pixel driving circuit comprises a data writing stage and a light emission stage, wherein
• in the data writing stage, the first scan terminal controls the first transistor to be turned on, and the second scan terminal controls the second transistor to be turned off so that a data signal is provided for the data signal terminal;
• and
• in the light emission stage, the first scan terminal controls the first transistor to be turned off, and the second scan terminal controls the second transistor to be turned on so that a sweep signal is provided for the sweep signal terminal.