Display device with self-adjusting power supply

An electronic device comprising:

• a processor providing input image data,
• a display device displaying an image based on the input image data, and
• an external power supply providing external power to the display device,
• wherein the display device including:
• a display panel including pixels connected between a first power line and a second power line, each of the pixels including a light emitting element, a driving transistor that controls a current flowing through the light emitting element, and a switching transistor electrically connected between an anode electrode of the light emitting element and a readout line;
• and
• a power supply that generates first and second power voltages applied to the first and second power lines,
• wherein the power supply:
• maintains a voltage level of a third power voltage based on the external power provided to the pixels through the readout line at a first voltage level, in response to a value of a total current provided to the display panel through the first power line being within a first current section;
• and
• changes the voltage level of the third power voltage based on the external power provided to the pixels through the readout line in response to the value of the total current provided to the display panel through the first power line being greater than a first reference current value associated with the current section to reduce a driving current flowing through the light emitting element.