Electronic device and method for extending time interval during which upscaling is performed on basis of horizontal synchronization signal

An electronic device comprising:

• a display panel;
• a Display Driving Integrated Circuit (DDIC) operatively coupled to the display panel;
• and
• a processor operatively coupled to the DDIC,
• wherein the DDIC is configured to:
• receive, from the processor, first image data to display an image at a first resolution, which is transmitted based on a horizontal synchronization signal including a first porch interval;
• obtain second image data to display the image at a second resolution higher than the first resolution, based at least on the first image data;
• and
• display the image at the second resolution by using the display panel, based on the obtained second image data,
• wherein a length of the first porch interval is changed, based on a relative ratio of the first resolution and the second resolution, to be longer than a length of a second porch interval included in a horizontal synchronization signal for displaying the image at the first resolution.