Electronic device and method of driving the same

An electronic device comprising:

• a display layer configured to display an image;
• a driving controller configured to receive an input image signal and a control signal and to output a horizontal synchronization signal and image data;
• a data driving circuit configured to provide a data signal to the display layer in response to the horizontal synchronization signal and the image data;
• a sensor layer on the display layer;
• and
• a sensor driver configured to drive the sensor layer and to receive sensing signals from the sensor layer,
• wherein the sensor driver is configured to:
• output a horizontal synchronization control signal of a first level during a touch sensing mode of detecting a touch input;
• and
• output the horizontal synchronization control signal of a second level different from the first level during a pen sensing mode of detecting a pen input, and
• wherein the driving controller is configured to change a horizontal period of the horizontal synchronization signal in response to the horizontal synchronization control signal.