Display device and electrical device using the same

An electrical device comprising:

• a main body;
• and
• a display panel at one side of the main body and configured to display an image through a screen that is bent around at least one folding portion,
• wherein the display panel comprises:
• a substrate comprising a first region and a second region that are adjacent to each other relative to the folding portion, wherein the second region is bent relative to the first region;
• a plurality of first pixels at the first region;
• a plurality of second pixels at the second region;
• and
• an optical resonance layer at one region among the first region and the second region,
• wherein each of the plurality of first pixels and each of the plurality of second pixels comprise a plurality of light-emitting diodes (LEDs) that produce different colors.