Display device and display panel

A display panel comprises: a substrate SUB including a display area (DA, Figure 1A), an optical area OA allowing light to be transmitted through the substrate, and a normal area (NA, Figure 1A) located outside of the optical area; a first driving transistor DT1; a planarization layer PLN; a first anode electrode AE1 disposed in the optical area; a bank BK having a light emitting opening; a first emission layer EL disposed in the optical area; a cathode electrode CE disposed in common in the optical area and the normal area, the cathode electrode comprising a plurality of cathode holes CH in the optical area; and a plurality of patterning layers MPL each disposed in a respective cathode hole, the patterning layer comprising a non-metal material. A plurality of bank transmission openings (BTO, Figure 15) and planarization layer transmission openings (PTO, Figure 16) may be disposed in the optical area. A display device comprising the display panel may have one or more optical electronic devices located under the substrate overlapping the optical area. The structure improves the transmittance of the optical area overlapping the optical electronic devices, such as a camera or sensor, located under the display area.