Display device and control method thereof

A control method of a display device comprising a display panel to display a frame of a first resolution up to a first frame rate, the method comprising:

• based on change from a first mode of displaying a content, among a plurality of modes of the display device, to a second mode of displaying plural contents, among the plurality of modes of the display device, changing frame rates of a plurality of contents output from a plurality of image processing units to a same frame rate;
• mixing the plurality of contents with the frame rates having been changed to the same frame rate;
• changing a vertical resolution of the mixed content;
• and outputting the mixed content of which the vertical resolution has been changed at a second frame rate greater than the first frame rate through the display panel.

A non-transitory recording medium for storing a program for performing an operation method of a display device for displaying a frame of a first resolution up to a first frame rate, wherein the operation method comprising:

• based on change from a first mode of displaying a content, among a plurality of modes of the display device, to a second mode of displaying plural contents, among the plurality of modes of the display device, changing frame rates of a plurality of contents output from a plurality of image processing units to a same frame rate;
• mixing the plurality of contents with the frame rates having been changed to the same frame rate;
• changing a vertical resolution of the mixed content;
• and outputting the mixed content of which the vertical resolution has been changed at a second frame rate greater than the first frame rate through the display panel.