Display device capable of preventing external light reflection

1. A display device comprising:

a display panel having a first region and a second region having a transmittance lower than a transmittance of the first region, the display panel including a substrate and a pixel layer disposed on one side of the substrate, the pixel layer including a first electrode, a second electrode, and a light emitting layer disposed between the first electrode and the second electrode;

an anti-reflection layer disposed on the other side of the substrate which opposes the one side of the substrate in an area corresponding to the first region not to overlap the second region; and

a functional module disposed under the display panel in an area corresponding to the first region not to overlap the second region,

wherein the anti-reflection layer includes:

a first anti-reflection pattern including first metal; and

a second anti-reflection pattern disposed on the first anti-reflection pattern and including molybdenum oxide (MoOx) and oxide of a second metal other than molybdenum, and

wherein the functional module includes one of a camera module, a face recognition sensor module, a pupil recognition sensor module, an acceleration sensor module, a geomagnetic sensor module, a proximity sensor module, an infrared sensor module and an illuminance sensor module.

2. The display device of claim 1 , wherein the anti-reflection layer overlaps the first region and does not overlap the second region.

3. The display device of claim 1 , wherein the first metal includes at least one of molybdenum (Mo), aluminum (Al), and titanium (Ti).

4. The display device of claim 1 , wherein the second metal includes at least one of tantalum (Ta), tungsten (W), niobium (Nb), and copper (Cu).

5. The display device of claim 1 , wherein a ratio of the second metal to molybdenum in the second anti-reflection pattern is greater than 0 atomic percent (at. %) and less than about 20 atomic percent (at. %).

6. The display device of claim 1 , wherein the molybdenum oxide included in the second anti-reflection pattern and the oxide of the second metal have a crystalline structure.

7. The display device of claim 1 , wherein the first anti-reflection pattern is disposed between the substrate and the second anti-reflection pattern.

8. The display device of claim 1 , wherein the anti-reflection layer is disposed on a top surface of the substrate, and the second anti-reflection pattern is disposed between the substrate and the first anti-reflection pattern.

9. The display device of claim 1 , wherein the second anti-reflection pattern has a thickness greater than about 100 Å and smaller than about 1000 Å.

10. The display device of claim 1 , wherein a side-wall of the anti-reflection layer is inclined with respect to the substrate.

11. The display device of claim 1 , wherein the second anti-reflection pattern has a reflectivity less than a reflectivity of the first anti-reflection pattern.

12. The display device of claim 1 , wherein the first region include a first pixel region, a transmission region, and a first peripheral region surrounding the first pixel region and the transmission region.

13. The display device of claim 12 , wherein the anti-reflection lay overlaps the first pixel region and the first peripheral region and does not overlap the transmission region.

14. The display device of claim 12 , wherein the second region includes a second pixel region and a second peripheral region surrounding the second pixel region.

15. The display device of claim 1 , wherein the second region surrounds at least a part of the first region.