Display device

1. A display device comprising:

a lower substrate having a display area and a peripheral area at least partially surrounding the display area;

a plurality of lower electrodes disposed in the display area and on the lower substrate;

a pixel defining layer configured to cover a portion of each of the lower electrodes;

a light emitting layer disposed on the lower electrodes and the pixel defining layer;

an upper electrode disposed on the light emitting layer;

a plurality of optical filters disposed on the upper electrode and spaced apart from each other;

a lower light blocking layer disposed between the optical filters, and having a plurality of openings;

an upper substrate disposed on the lower light blocking layer to oppose the lower substrate; and

an alignment structure disposed in the peripheral area of the lower substrate and the upper substrate, and including a material identical to a material of the pixel defining layer and the lower light blocking layer, wherein the alignment structure includes:

a first alignment pattern disposed on a bottom surface of the upper substrate; and

a second alignment pattern disposed on a top surface of the lower substrate,

wherein the first alignment pattern includes:

a reference pattern; and

outer peripheral patterns spaced apart from the reference pattern while surrounding the reference pattern,

wherein the outer peripheral patterns are spaced apart from each other.

2. The display device of claim 1 , wherein the lower electrodes, the optical filters, and the openings of the lower light blocking layer overlap each other.

3. The display device of claim 1 , wherein the lower light blocking layer overlaps the pixel defining layer.

4. The display device of claim 1 , wherein the first alignment pattern and the lower light blocking layer include a same material, and

the second alignment pattern and the pixel defining layer include a same material.

5. The display device of claim 1 , wherein each of the outer peripheral patterns is spaced apart from the reference pattern at a same interval.

6. The display device of claim 1 , wherein the second alignment pattern includes a first pattern disposed between the reference pattern and the outer peripheral patterns, wherein the first pattern has a rectangular shape including an opening, and

wherein the opening of the first pattern overlaps the reference pattern.

7. The display device of claim 1 , wherein the second alignment pattern includes a first pattern disposed between the reference pattern and the outer peripheral patterns, wherein the first pattern has a rectangular shape including an opening, and

wherein the first pattern surrounds the reference pattern without overlapping the reference pattern and the outer peripheral patterns.

8. The display device of claim 1 , wherein the second alignment pattern includes:

a first pattern disposed between the reference pattern and the outer peripheral patterns, wherein the first pattern has a rectangular shape including an opening; and

a second pattern disposed between the first pattern and the lower substrate to overlap the reference pattern, the outer peripheral pattern, and the first pattern.

9. The display device of claim 8 , wherein the second pattern includes a metal material.

10. The display device of claim 1 , further comprising a plurality of color filters disposed between the lower substrate and the upper substrate,

wherein the color filters overlap the optical filters, respectively.

11. The display device of claim 10 , further comprising:

a first protective insulating layer disposed between the optical filters and the color filters; and

a second protective insulating layer disposed between the lower light blocking layer and the optical filters,

wherein the first protective insulating layer and the second protective insulating layer make contact with each other between the optical filters.

12. The display device of claim 10 , wherein the color filters include:

a first color filter disposed on a bottom surface of the upper substrate to transmit blue light, and having a plurality of first openings and a plurality of second openings;

second color filters respectively disposed in the first openings on the bottom surface of the upper substrate to transmit red light; and

third color filters respectively disposed in the second openings on the bottom surface of the upper substrate to transmit green light.

13. The display device of claim 12 , further comprising an upper light blocking layer disposed between the first color filter and the lower light blocking layer, and having a plurality of openings,

wherein the openings of the upper light blocking layer overlap the openings of the lower light blocking layer.

14. The display device of claim 12 , wherein the optical filters include:

a first quantum dot pattern disposed on the second color filters to convert the blue light into the red light;

a second quantum dot pattern disposed on the third color filters to convert the blue light into the green light; and

a scattering pattern disposed on the first color filter to transmit the blue light.

15. The display device of claim 14 , wherein the first color filter includes an opening area and a light transmission area,

the first and second openings are located in the opening area, and

the scattering pattern overlaps the light transmission area.

16. The display device of claim 1 , further comprising:

a thin film encapsulation structure disposed in the display area between the upper electrode and the lower light blocking layer; and

a sealing member surrounding the display area in the peripheral area between the lower substrate and the upper substrate.

17. The display device of claim 1 , wherein the light emitting layer is configured to emit blue light, and

the light emitting layer is integrally formed in the display area on the lower substrate.