Display apparatus including multi-base and multi-barrier layer substrate

1. A display apparatus comprising:

a first barrier layer comprising a first display area, a second display area comprising transmission areas, and a non-display area;

a first base layer on a lower surface of the first barrier layer, and defining a first opening that overlaps the second display area;

a second base layer on an upper surface of the first barrier layer, and defining second openings that respectively overlap the transmission areas;

a second barrier layer on an upper surface of the second base layer and defining third openings that overlap the second openings;

main pixel electrodes over the second barrier layer in the first display area; and

auxiliary pixel electrodes over the second barrier layer in the second display area.

2. The display apparatus of claim 1 , further comprising a first auxiliary opposite electrode over the auxiliary pixel electrodes, overlapping the auxiliary pixel electrodes, and defining fourth openings overlapping with the transmission areas.

3. The display apparatus of claim 2 , wherein respective inner lateral surfaces of the third openings protrude more inwardly than respective inner lateral surfaces of the second openings.

4. The display apparatus of claim 3 , wherein, as viewed in a direction perpendicular to the upper surface of the first barrier layer, an area of each of the third openings is less than an area of each of the second openings.

5. The display apparatus of claim 3 , further comprising second auxiliary opposite electrodes on the first barrier layer to correspond to the fourth openings.

6. The display apparatus of claim 5 , wherein the second auxiliary opposite electrodes each have the same layer structure as the first auxiliary opposite electrode.

7. The display apparatus of claim 2 , further comprising a main opposite electrode over the main pixel electrodes, overlapping the main pixel electrodes, and integral with the first auxiliary opposite electrode.

8. The display apparatus of claim 1 , further comprising a transparent layer on the lower surface of the first barrier layer in the first opening.

9. The display apparatus of claim 1 , further comprising an encapsulation layer that covers the main pixel electrodes, the auxiliary pixel electrodes, respective inner lateral surfaces of the third openings, and respective inner lateral surfaces of the second openings.

10. The display apparatus of claim 9 , wherein the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer.

11. The display apparatus of claim 1 , further comprising:

main thin-film transistors on the second barrier layer in the first display area, electrically connected to the main pixel electrodes, and each comprising a main semiconductor layer and a main gate electrode; and

auxiliary thin-film transistors on the second barrier layer in the second display area, electrically connected to the auxiliary pixel electrodes, and each comprising an auxiliary semiconductor layer and an auxiliary gate electrode.

12. The display apparatus of claim 1 , further comprising:

main thin-film transistors on the second barrier layer in the first display area, electrically connected to the main pixel electrodes, and each comprising a main semiconductor layer and a main gate electrode;

auxiliary thin-film transistors on the second barrier layer in the non-display area, and each comprising an auxiliary semiconductor layer and an auxiliary gate electrode; and

connection lines configured to electrically connect the auxiliary thin-film transistors to the auxiliary pixel electrodes.

13. The display apparatus of claim 1 , wherein the first base layer comprises an opaque material.