Display device

A display device comprising:

• a display panel including a substrate and a plurality of insulating layers, a transistor layer, and a light emitting device layer on the substrate, the display panel including a display area in which an image is displayed, the display area including a first display area and a second display area;
• and
• a light receiving device positioned behind the display panel and overlapping with the first display area,
• wherein the number of subpixels per unit area in the first display area is smaller than the number of subpixels per unit area in the second display area,
• wherein the first display area includes at least one non-transmissive area in which transistors of the transistor layer and light emitting devices of the light emitting device layer are located, and at least one transmissive area through which external light is transmitted to the light receiving device, and
• wherein the substrate or at least one insulating layer among the plurality of insulating layers includes at least one hole or at least one uneven portion in a portion overlapping the at least one transmissive area.