Pixel, display device including the same, and electronic device

A display device comprising:

• a plurality of pixels;
• and
• a power supply configured to provide a first power voltage to the pixels,
• wherein each of the pixels comprises:
• a first transistor having a first electrode receiving the first power voltage and controlling an amount of a driving current;
• a second transistor having a first electrode connected to a data line and receiving a data voltage from the data line when the second transistor is turned on;
• and
• a light emitting element configured to emit light with a luminance in response to the amount of the driving current,
• wherein the power supply provides the first power voltage in a constant voltage level during a first period from a time point when the second transistor is turned off to a time point when the second transistor is turned on again, in a first mode,
• wherein the power supply provides the first power voltage in a pulse width modulation method in which a duty ratio of each of a plurality of pulses gradually increases during a second period from a first time point when the second transistor is turned off to a second time point when the second transistor is turned on again, in a second mode, and
• wherein the second period is longer than the first period.

An electronic device comprising:

• a processor to provide an image signal;
• and
• a display device to display an image based on the image signal,
• wherein the display device comprises:
• a plurality of pixels;
• and
• a power supply configured to provide a first power voltage to the pixels,
• wherein each of the pixels comprises:
• a first transistor having a first electrode receiving the first power voltage and controlling an amount of a driving current;
• a second transistor having a first electrode connected to a data line and receiving a data voltage from the data line when the second transistor is turned on;
• and
• a light emitting element configured to emit light with a luminance in response to the amount of the driving current,
• wherein the power supply provides the first power voltage in a constant voltage level during a first period from a time point when the second transistor is turned off to a time point when the second transistor is turned on again, in a first mode,
• wherein the power supply provides the first power voltage in a pulse width modulation method in which a duty ratio of each of a plurality of pulses gradually increases during a second period from a time point when the second transistor is turned off to a time point when the second transistor is turned on again, in a second mode, and
• wherein the second period is longer than the first period.