Display device and method of manufacturing the same
View Patent ↗A display device, and method for making the same, comprising a thin film transistor formed on a first insulating substrate, a pixel electrode electrically connected to the thin film transistor, an organic layer formed on the pixel electrode, a common electrode formed on the organic layer, a conductive layer formed on the common electrode, a transparent electrode layer formed on the conductive layer, the transparent electrode being applied with a common voltage, and a second insulating substrate located on the transparent electrode layer. Thus, the present invention provides a display device to which common voltage is applied effectively.
1. A display device comprising:
a thin film transistor formed on a first insulating substrate;
a pixel electrode electrically connected to the thin film transistor;
an organic layer formed on the pixel electrode;
a common electrode formed on the organic layer;
a conductive layer formed on the common electrode;
a transparent electrode layer formed on the conductive layer for application of a common voltage; and
a second insulating substrate located on the transparent electrode layer.
2. The display device according to claim 1 , wherein the conductive layer comprises a conductive polymer.
3. The display device according to claim 2 , wherein the conductive layer comprises at least one selected from the group consisting of polypyrrole, polyaniline and polythiophene.
4. The display device according to claim 1 , wherein the conductive layer comprises conductive particles.
5. The display device according to claim 4 , wherein the conductive particles comprise Ag or Ni.
6. The display device according to claim 1 , wherein the conductive layer is eliminated on the organic layer.
7. The display device according to claim 1 , wherein an upper side of the conductive layer is substantially flat.
8. The display device according to claim 1 , wherein the common electrode comprises Mg and Ag.
9. The display device according to claim 1 , wherein the common electrode comprises Ca and Ag.
10. The display device according to claim 1 , wherein the common electrode is about 50 Å A to about 200 Å thick.
11. The display device according to claim 1 , wherein the transparent electrode layer comprises indium tin oxide (ITO) or indium zinc oxide (IZO).
12. The display device according to claim 1 , wherein light generated from the organic layer is directed through the second insulating substrate to an outside.
13. The display device according to claim 1 , wherein the first insulating substrate is provided thereon with a display region and a non-display region defined around the display region, and the non-display region is formed with a non-conductive sealant for adjoining the first insulating substrate with the second insulating substrate.
14. The display device according to claim 13 , wherein the non-conductive sealant contacts the transparent electrode layer.
15. The display device according to claim 1 , wherein the first insulating substrate is provided thereon with a display region and a non-display region defined around the display region, and the transparent electrode layer corresponds to the display region.
16. The display device according to claim 1 , wherein the first insulating substrate is provided thereon with a display region and a non-display region defined around the display region, and an insulating layer is formed between the non-display region and the conductive layer.
17. The display device according to claim 1 , wherein the first insulating is provided thereon with a display region and a non-display region defined around the display region, and the non-display region is formed with a shorting bar for applying a common voltage to the transparent electrode layer.
18. The display device according to claim 1 , further comprising:
a bank surrounding the organic layer.
19. The display device according to claim 1 , wherein the organic layer comprises a hole injecting layer and a light-emitting layer.
20. The display device according to claim 19 , wherein the hole injecting layer and the light-emitting layer are sequentially stacked thereon.
21. The display device according to claim 19 , wherein the hole injecting layer comprises poly (3,4-ethylenedioxythiophene)(PEDOT) and polystyrene sulfonic acid.
22. The display device according to claim 19 , wherein the light-emitting layer comprises a polymer.
23. A method of making a display device comprising:
forming a thin film transistor on a first insulating substrate;
forming a pixel electrode electrically connected to the thin film transistor;
forming an organic layer on the pixel electrode;
forming a common electrode on the organic layer;
forming a conductive layer on the common electrode;
forming a transparent electrode layer for application of common voltage on a second insulating substrate; and
forming the second insulating substrate on the conductive layer, the transparent electrode layer being contacted with the conductive layer.