Display device
A display device includes a first substrate including a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area, a plurality of light emitting elements on the first substrate in the display area, the plurality of light emitting elements being electrically connected to the pixel circuit units, a hole mask layer on the first substrate and including a plurality of holes corresponding to the light emitting elements, a second substrate on the hole mask layer and including a plurality of open holes corresponding to the plurality of holes, and a plurality of light exit patterns in the plurality of the open holes of the second substrate corresponding to the plurality of holes, wherein each of the light exit patterns includes a first part in one of the plurality of open holes.
1. A display device comprising:
a first substrate comprising a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area;
a light emitting element on the first substrate in the display area, the light emitting element being electrically connected to at least one of the pixel circuit units;
a hole mask layer on the first substrate and comprising a hole that overlaps the light emitting element;
a second substrate on the hole mask layer and comprising an open hole that overlaps the hole; and
a light exit pattern in the open hole of the second substrate,
wherein the light exit pattern comprises a first part in the open hole and a second part protruding from an upper surface of the second substrate, wherein a refractive index of the light exit pattern is different from a refractive index of the second substrate.
2. The display device of claim 1 , wherein a maximum diameter of the second part is greater than a diameter of the hole, and
wherein side surfaces of the first part that are in contact with the second substrate are inclined.
3. The display device of claim 2 , wherein the second part has a curved outer surface.
4. The display device of claim 2 , wherein a refractive index of the second part is different from a refractive index of the first part.
5. The display device of claim 1 , wherein the hole and the light exit pattern overlap the light emitting element in a thickness direction of the display device.
6. The display device of claim 1 , wherein the light emitting element is configured to emit light of a first color, and
wherein the light exit pattern comprises a colorant to block transmission of the light of the first color.
7. The display device of claim 1 , wherein the first part of the light exit pattern comprises wavelength conversion particles to convert a wavelength of light of a first color emitted from the light emitting element, and
wherein the second part of the light exit pattern comprise a colorant to block transmission of the light of the first color.
8. The display device of claim 1 , further comprising:
a third substrate between the hole mask layer and the first substrate; and
a color control structure between the third substrate and the light emitting element,
wherein the color control structure overlaps the light emitting element in a thickness direction of the display device.
9. The display device of claim 8 , further comprising a color filter between the third substrate and the color control structure,
wherein a width of the color filter is greater than a diameter of the hole.
10. The display device of claim 1 , further comprising a capping layer on the second substrate,
wherein a refractive index of the capping layer is smaller than the refractive index of the first part.
11. The display device of claim 10 , wherein the refractive index of the capping layer is the same as the refractive index of the second substrate.
12. The display device of claim 11 , wherein a thickness of the capping layer is equal to or smaller than a thickness of the second part.
13. The display device of claim 1 , wherein the light emitting element comprises a first semiconductor layer, an active layer on the first semiconductor layer, and a second semiconductor layer on the active layer, and
wherein the display device further comprises a third semiconductor layer on the first substrate and on a surface of which the second semiconductor layer of the light emitting element is located.
14. The display device of claim 13 , wherein the light emitting element comprises a plurality of light emitting elements,
wherein the second semiconductor layers of the plurality of light emitting elements are connected to each other through a base layer on the surface of the third semiconductor layer in the display area and the non-display area, and
wherein the display device further comprises a plurality of first connection electrodes respectively located between the plurality of light emitting elements and the first substrate in the display area, and
wherein a plurality of second connection electrodes is located between the first substrate and the base layer in the non-display area.
15. The display device of claim 14 , wherein the first substrate comprises a plurality of pixel electrodes in the display area and a plurality of common electrodes in the non-display area, and
wherein each of the plurality of light emitting elements is on a respective one of the pixel electrodes, and the second connection electrodes are on the common electrodes.
16. A display device comprising:
a first substrate comprising a display area and a non-display area around the display area;
a plurality of light emitting elements spaced from each other in a first direction and a second direction in the display area of the first substrate;
a plurality of common electrodes in the non-display area of the first substrate, and being around the display area;
a hole mask layer on the first substrate and comprising a plurality of holes corresponding to respective ones of the light emitting elements and spaced from each other in the first direction and the second direction;
a second substrate on the hole mask layer and comprising a plurality of open holes formed to correspond to the plurality of holes; and
a plurality of light exit patterns in the open holes and are spaced from each other in the first direction and the second direction,
wherein the light exit patterns comprise a material, and
wherein a refractive index of the material of the light exit patterns is different from a refractive index of the second substrate.
17. The display device of claim 16 , wherein a maximum diameter of the light exit patterns is greater than a diameter of the plurality of holes.
18. The display device of claim 17 , further comprising:
a plurality of color control structures between the first substrate and the second substrate, the plurality of color control structures overlapping with respective ones of the light emitting elements; and
a plurality of color filters overlapping the color control structures,
wherein the color filters overlap the plurality of holes.
19. The display device of claim 18 , wherein a diameter of the color filters is greater than the diameter of the plurality of holes.
20. The display device of claim 18 , further comprising a bank layer around the color filters and extending in the first direction and the second direction.