Electrowetting display device and manufacturing method thereof
The present inventive concept relates to an electrowetting display device including a lyophobic colloid material and a polymer resin such as an organic layer or a polyimide (PI), and a lyophobic layer including a supporting layer supporting the lyophobic colloid material and using a photoreactive fluorine-based surfactant for a fluorine-based material to be positioned above and for a hardened photoreactive material layer to be positioned below through exposure in a single step without separately performing a hydrophilic treatment and then a water-repellent treatment, thereby reducing the number of processes, the manufacturing time, and the cost.
1. An electrowetting display device comprising:
a first substrate and a second substrate;
an electrode disposed on the second substrate;
an insulating layer disposed on the electrode;
partitions defined on the insulating layer, wherein the partitions partition the insulating layer into pixel areas;
a black matrix arranged on the first substrate and including a first opening and a second opening;
a first color filter disposed on the first substrate in the first opening of the black matrix;
a second color filter disposed on the first substrate in the second opening of the black matrix; and
a lyophobic layer formed on the insulating layer between the partitions, wherein the lyophobic layer comprises a lyophobic colloid material above a polymer resin.
2. The electrowetting display device of claim 1 , wherein the first and second openings correspond to the pixel areas on the insulating layer.
3. The electrowetting display device of claim 1 , wherein the first and second color filters comprise a pigment that transmits only light of a predetermined wavelength.
4. The electrowetting display device of claim 1 , wherein the first and second color filters comprise quantum dots disposed on the first substrate.
5. The electrowetting display device of claim 4 , wherein the quantum dots comprise a semiconductor nanocrystal material.
6. The electrowetting display device of claim 1 , further comprising:
a reflecting electrode disposed on the second substrate.
7. The electrowetting display device of claim 6 , wherein the reflecting electrode is disposed between the electrode and the insulating layer.
8. The electrowetting display device of claim 1 , wherein the partitions comprises a black dye.
9. The electrowetting display device of claim 8 , wherein the partitions overlap at least part of a thin film transistor arranged on the second substrate.
10. The electrowetting display device of claim 1 , wherein at least part of the black matrix overlaps at least part of a thin film transistor arranged on the second substrate.
11. The electrowetting display device of claim 1 , wherein:
the polymer resin comprises one of (i) an organic layer or (ii) a polyimide; and
the lyophobic colloid material is positioned above the polymer resin.
12. The electrowetting display device of claim 1 , wherein a black oil layer is disposed on the lyophobic layer between the partitions.
13. The electrowetting display device of claim 1 , wherein the lyophobic colloid material is phase-separated from the polymer resin.
14. A method for manufacturing an electrowetting display device, comprising:
providing a first substrate and a second substrate;
forming an electrode on the second substrate;
forming an insulating layer on the electrode;
forming partitions on the insulating layer, wherein the partitions partition the insulating layer into pixel areas;
forming a black matrix on the first substrate such that the black matrix includes openings;
forming color filters on the first substrate and in the openings of the black matrix;
applying a lyophobic colloid mixed liquid on the insulating layer between the partitions;
pre-baking the lyophobic colloid mixed liquid to phase-separate the lyophobic colloid mixed liquid; and
coupling the first substrate and the second substrate.
15. The method of claim 14 , wherein the openings correspond to the pixel areas on the insulating layer.
16. The method of claim 14 , wherein each of the color filters comprises a pigment that transmits only light of a predetermined wavelength.
17. The method of claim 14 , wherein the color filters comprise quantum dots disposed on the first substrate.
18. The method of claim 17 , wherein the quantum dots comprise a semiconductor nanocrystal material.
19. The method of claim 14 , further comprising:
forming a reflecting electrode on the second substrate.
20. The method of claim 14 ,
wherein the lyophobic colloid mixed liquid comprises a mixture including a lyophobic colloid material and a supporting layer material, and wherein the lyophobic colloid material is positioned above the supporting layer material on the insulating layer between the partitions.
21. The method of claim 20 , further comprising,
after pre-baking the lyophobic colloid mixed liquid, forming a black oil layer on the lyophobic layer between the partitions.
22. The method of claim 20 , wherein the supporting material comprises at least one of a polymer resin of an organic layer or a polyimide (PI).
23. An electrowetting display device comprising:
a first substrate and a second substrate;
an electrode disposed on the second substrate;
an insulating layer disposed on the electrode;
partitions defined on the insulating layer, wherein the partitions partition the insulating layer into pixel areas;
a black matrix arranged on the first substrate; and
a lyophobic layer formed on the insulating layer between the partitions, wherein the lyophobic layer is phase-separated such that the lyophobic layer comprises (i) lyophobic colloid material and (ii) a polymer resin, and wherein:
the polymer resin comprises at least one of (i) an organic layer or (ii) a polyimide; and
the lyophobic colloid material is positioned above the polymer resin.