Display panel and display device including the same for light transmittance in light-transmitting areas and enhancing reliability of display panel

A display device comprising:

• a substrate;
• a display panel including a first area and a second area defined on the substrate, the first area including a plurality of first pixels, the second area including a pixel area including a plurality of second pixels and a plurality of light-transmitting areas disposed between the plurality of second pixels;
• and
• at least one sensor disposed under the second area,
• wherein a light emitting element included in each of the plurality of first pixels and the plurality of second pixels includes an anode layer and a plurality of cathode layers,
• wherein the plurality of cathode layers are disposed in areas except for the plurality of light-transmitting areas,
• wherein each of the plurality of cathode layers includes a first cathode layer and a second cathode layer,
• wherein the first cathode layer is disposed to cover a corresponding pixel among the plurality of first pixels or the plurality of second pixels, the second cathode layer does not cover the corresponding pixel, and
• wherein the second cathode layer is disposed to connect two adjacent first cathode layers among the plurality of cathode layers.