Color conversion structure, display apparatus, and method of manufacturing color conversion structure
Provided are a color conversion structure, a display apparatus, and a method of manufacturing a color conversion structure. The color conversion structure includes a bank structure including a groove, a color conversion layer accommodated in the groove, and a cover layer provided on the color conversion layer.
1 . A color conversion structure comprising:
a bank structure comprising a groove having a bottom surface and an upper opening;
a color conversion layer provided in the groove and contacting the bottom surface of the groove; and
a cover layer provided on the color conversion layer,
wherein first roughness of the cover layer is greater than second roughness of a bottom surface of the bank structure.
2 . The color conversion structure of claim 1 , wherein the color conversion layer is formed as a colloidal film.
3 . The color conversion structure of claim 1 , further comprising a reflective layer provided on a sidewall of the bank structure.
4 . The color conversion structure of claim 3 , wherein the second roughness of the bottom surface of the bank structure is less than third roughness of the reflective layer.
5 . The color conversion structure of claim 1 , wherein the cover layer comprises a distributed Bragg reflective layer.
6 . The color conversion structure of claim 1 , wherein the bank structure comprises a bottom layer and a sidewall, and the bottom layer comprises a distributed Bragg reflective layer.
7 . The color conversion structure of claim 1 , wherein the groove comprises a curved surface.
8 . The color conversion structure of claim 1 , wherein the cover layer comprises a convex curved surface.
9 . The color conversion structure of claim 1 , wherein the color conversion layer comprises a first color conversion layer configured to convert incident light into first color light, and a second color conversion layer configured to convert the incident light into second color light.
10 . The color conversion structure of claim 1 , wherein an upper surface of the cover layer comprises an uneven structure.
11 . The color conversion structure of claim 1 , wherein a thickness of the color conversion layer is less than a depth of the groove.
12 . The color conversion structure of claim 1 , wherein a thickness of the color conversion layer ranges from 10 μm to 15 μm.
13 . The color conversion structure of claim 1 , wherein the color conversion layer has a structure in which quantum dots are embedded in a porous layer.
14 . The color conversion structure of claim 13 , wherein the porous layer comprises n-GaN.
15 . A display apparatus comprising:
a display substrate;
a plurality of micro semiconductor chips provided on the display substrate to be spaced apart from each other; and
a color conversion structure provided on each of the plurality of micro semiconductor chips,
wherein the color conversion structure comprises:
a bank structure comprising a groove having a bottom surface and an upper opening,
a color conversion layer filled in the groove and contacting the bottom surface of the groove, and
a cover layer provided on the color conversion layer,
wherein first roughness of the cover layer is greater than second roughness of a bottom surface of the bank structure.
16 . The display apparatus of claim 15 , wherein the second roughness of the bottom surface of the bank structure is less than third roughness of the reflective layer.
17 . The display apparatus of claim 15 , wherein the cover layer is located adjacent to the respective micro semiconductor chip to face the respective micro semiconductor chip.
18 . The display apparatus of claim 15 , wherein the color conversion structure further comprises a reflective layer provided on a sidewall of the bank structure.
19 . The display apparatus of claim 18 , wherein the color conversion layer is formed as a colloidal film.
20 . The display apparatus of claim 15 , wherein the cover layer is a distributed Bragg reflective layer.
21 . The display apparatus of claim 15 , wherein the bank structure comprises a bottom layer and a sidewall, and the bottom layer is a distributed Bragg reflective layer.
22 . The display apparatus of claim 15 , wherein the groove comprises a curved surface.
23 . The display apparatus of claim 15 , wherein the cover layer comprises a convex curved surface.
24 . The display apparatus of claim 15 , wherein an upper surface of the cover layer comprises an uneven structure.
25 . The display apparatus of claim 15 , wherein a thickness of the color conversion layer ranges from 10 μm to 15 μm.
26 . The display apparatus of claim 15 , wherein the color conversion layer has a structure in which quantum dots are embedded in a porous layer.
27 . The display apparatus of claim 26 , wherein the porous layer comprises n-GaN.
28 . A color conversion structure comprising:
a first layer;
a color conversion layer provided on the first layer;
a first sidewall provided on a first side of the color conversion layer;
a second sidewall provided on a second side of the color conversion layer;
a cover layer provided on the color conversion layer, the first sidewall and the second sidewall,
wherein first roughness of the cover layer is greater than second roughness of a surface of the first layer.
29 . The color conversion structure of claim 28 , wherein the first layer and the first and second sidewalls are a one-piece structure.
30 . The color conversion structure of claim 28 , further comprising a reflective layer provided on a sidewall of the bank structure.
31 . The color conversion structure of claim 30 , wherein the second roughness of the bottom surface of the bank structure is less than third roughness of the reflective layer.
32 . The color conversion structure of claim 28 , wherein the color conversion layer is formed as a colloidal film.