Pixel driving circuit, display device and operating method thereof

An operating method of a display device, comprising:

• adjusting a current according to a first scanning signal and a first light emitting signal;
• adjusting a voltage level of the first scanning signal with a first slope, a second slope and a third slope during a first period, a second period and a third period, respectively, wherein the first period, the second period and the third period are arranged continuously in order;
• adjusting a voltage level of the first light emitting signal to a enable voltage level during the first period and the third period;
• adjusting the voltage level of the first light emitting signal to a disable voltage level during the second period;
• the current flowing through a light emitting element;
• and
• the light emitting element emitting light based on the current.

A pixel driving circuit, comprising:

• a light emitting element configured to receive a current to emit light;
• a driving unit configured receive a first scanning signal to adjust the current;
• and
• a control unit configured to receive a first light emitting signal to adjust the current,
• wherein a voltage level of the first scanning signal is decreased during a plurality of decreasing periods, and a voltage level of the first scanning signal has a slope substantially equal to zero during a plurality of light emitting periods, wherein the plurality of decreasing periods and the plurality of light emitting periods are arranged alternately in a frame time.