Electroluminescent display device

1. An electroluminescent display device including a first subpixel, a second subpixel, and a third subpixel, comprising:

a substrate;

an insulating layer on the substrate, the insulating layer comprising a trench;

a first electrode in each of the first to third subpixels, the first electrode being on the insulating layer;

an emission layer on the first electrode and the insulating layer; and

a second electrode on the emission layer,

wherein the trench is in a boundary between the first subpixel and the second subpixel,

wherein the trench is not in an entire boundary between the second subpixel and the third subpixel,

wherein the emission layer comprises:

a first stack configured to emit first-colored light,

a second stack configured to emit second-colored light different from the first-colored light, and

a charge generation layer between the first stack and the second stack,

wherein the first stack and the charge generation layer are each noncontiguous inside the trench in the boundary between the first subpixel and the second subpixel,

wherein the first stack and the charge generation layer are each contiguous in the boundary between the second subpixel and the third subpixel,

wherein the second stack is contiguous in the boundary between the first subpixel and the second subpixel, and

wherein the second stack is contiguous in the boundary between the second subpixel and the third subpixel.

2. The electroluminescent display device of claim 1 , wherein:

the first stack comprises a red emitting layer and a green emitting layer; and

the second stack comprises a blue emitting layer.

3. The electroluminescent display device of claim 1 , wherein:

the trench is in a boundary between the first subpixel and the third subpixel; and

at least some of the emission layer is noncontiguous inside the trench.

4. The electroluminescent display device of claim 1 , further comprising:

another first subpixel adjacent to the first subpixel, the another first subpixel being configured to a same-colored light as the first subpixel,

wherein the trench is not in a boundary between the first subpixel and the another first subpixel.

5. The electroluminescent display device of claim 1 , wherein:

the first subpixel, the second subpixel, and the third subpixel are provided in a horizontal arrangement structure;

the horizontal arrangement structure comprises a plurality of rows along a vertical direction; and

the trench has a contiguous straight-line structure along the vertical direction.

6. The electroluminescent display device of claim 1 , further comprising a fence structure surrounding a periphery of the first electrode and not directly contacting the trench.

7. The electroluminescent display device of claim 1 , further comprising a fence structure surrounding a periphery of the first electrode and directly contacting the trench.

8. The electroluminescent display device of claim 1 , wherein:

the first subpixel is configured to emit blue light;

the second subpixel is configured to emit one of: red light and green light; and

the third subpixel is configured to emit the other of the red light and the green light.

9. The electroluminescent display device of claim 1 , wherein an interval between the first electrode of the first subpixel and the first electrode of the second subpixel is larger than an interval between the first electrode of the second subpixel and the first electrode of the third subpixel.

10. The electroluminescent display device of claim 1 , further comprising:

a lens array spaced apart from the substrate; and

a receiving case configured to accommodate the substrate and the lens array therein.

11. An electroluminescent display device including a first subpixel, a second subpixel, and a third subpixel, comprising:

a substrate;

a first electrode in each of the first to third subpixels;

an emission layer on the first electrode, the emission layer being in the first to third subpixels and in a boundary area between each of the first to third subpixels; and

a second electrode on the emission layer,

wherein the emission layer comprises:

a first stack configured to emit first-colored light,

a second stack configured to emit second-colored light different from the first-colored light, and

a charge generation layer between the first stack and the second stack,

wherein the first stack and the charge generation layer are each noncontiguous in the boundary between the first subpixel and the second subpixel,

wherein the first stack and the charge generation layer are each contiguous in the boundary between the second subpixel and the third subpixel,

wherein the second stack is contiguous in the boundary between the first subpixel and the second subpixel, and

wherein the second stack is contiguous in the boundary between the second subpixel and the third subpixel.

12. The electroluminescent display device of claim 11 , wherein:

a trench is in the boundary area between the first subpixel and the second subpixel; and

the first stack and the charge generation layer are noncontiguous inside the trench.

13. The electroluminescent display device of claim 12 , further comprising:

an insulating layer between the substrate and the first electrode,

wherein the trench is in the insulating layer.

14. The electroluminescent display device of claim 11 , wherein:

the first stack comprises red and green emitting layers; and

the second stack comprises a blue emitting layer.

15. The electroluminescent display device of claim 11 , wherein:

the at least some of the emission layer is noncontiguous in the boundary between the first subpixel and the third subpixel;

the trench is in the boundary between the first subpixel and the third subpixel; and

the at least some of the emission layer is noncontiguous inside the trench.

16. The electroluminescent display device of claim 11 , further comprising:

another first subpixel adjacent to the first subpixel, the another first subpixel being configured to emit a same-colored light as the first subpixel,

wherein the emission layer is noncontiguous from the first subpixel to the another first subpixel.

17. The electroluminescent display device of claim 11 , wherein:

the first subpixel is configured to emit blue light;

the second subpixel is configured to emit one of: red light and green light; and

the third subpixel is configured to emit the other of: the red light and the green light.

18. The electroluminescent display device of claim 11 , further comprising:

a lens array spaced apart from the substrate; and

a receiving case configured to accommodate the substrate and the lens array therein.