Organic light-emitting display

Patent metadata

Field	Value
Publication number	US-10840308-B2
Application number	US-201816151518-A
Country	US
Kind code	B2
Filing date	Oct 4, 2018
Priority date	Nov 2, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An organic light-emitting display comprises an overcoat layer disposed on a substrate, the overcoat layer having concave portion and convex portion disposed between neighboring concave portions, and an organic light-emitting diode and an auxiliary organic light-emitting diode disposed on the overcoat layer. A first electrode of the organic light-emitting diode is placed in the concave portion. An auxiliary electrode of the auxiliary organic light-emitting diode is placed on the convex portion.

First claim

What is claimed is:

1. An organic light-emitting display comprising:
an overcoat layer disposed on a substrate and having a concave portion and a convex portion disposed between neighboring the concave portions, the concave portion formed by partially recessing a top surface of the overcoat layer inward; and
an organic light-emitting diode and an auxiliary organic light-emitting diode disposed on the overcoat layer,
wherein the organic light-emitting diode has a first electrode disposed in the concave portion, and the auxiliary organic light-emitting diode has an auxiliary electrode disposed on the convex portion.

2. The organic light-emitting display of claim 1 , wherein the auxiliary electrode is a reflective electrode.

3. The organic light-emitting display of claim 1 , further comprising an organic emission layer and a second electrode sequentially disposed on the first electrode and the auxiliary electrode,
wherein the organic light-emitting diode and the auxiliary organic light-emitting diode share the organic emission layer and the second electrode.

4. The organic light-emitting display of claim 1 , further comprising:
an opposing substrate facing the substrate; and
a color filter arranged on the opposing substrate.

5. The organic light-emitting display of claim 1 , further comprising a color filter disposed in the concave portion.

6. The organic light-emitting display of claim 5 , further comprising a passivation layer interposed between the organic light-emitting diode and the color filter, and covering the auxiliary organic light-emitting diode.

7. The organic light-emitting display of claim 1 , further comprising:
a thin-film transistor disposed under the overcoat layer and connected to the first electrode via a first pixel contact hole penetrating through the overcoat layer; and
an auxiliary thin-film transistor disposed under the overcoat layer and connected to the auxiliary electrode via a second pixel contact hole penetrating through the overcoat layer.

8. The organic light-emitting display of claim 7 , wherein the first pixel contact hole overlaps the concave portion, and the second pixel contact hole overlaps the convex portion.

9. The organic light-emitting display of claim 1 , wherein the first electrode is configured to function as a transparent electrode to allow light to pass through, and
wherein the auxiliary electrode is a reflective electrode.

10. The organic light-emitting display of claim 9 , further comprising:
an upper color filter through which a part of light emitted from the organic light-emitting diode passes; and
a lower color filter through which another part of the light emitted from the organic light-emitting diode passes,
wherein the upper color filter and the lower color filter are disposed to face each other with the organic light-emitting diode interposed therebetween.

11. The organic light-emitting display of claim 9 , wherein the auxiliary electrode includes a transparent conductive material and a metal material that are sequentially stacked, and the first electrode includes the transparent conductive material.

12. An organic light-emitting display comprising:
a plurality of pixels and a plurality of auxiliary pixels that are defined by a step formed by an overcoat layer,
wherein the auxiliary pixel includes an auxiliary electrode connected to an auxiliary thin-film transistor, and
wherein the auxiliary electrode is a reflective electrode.

13. An organic light-emitting display comprising:
an overcoat layer disposed on a substrate and having a concave portion and a convex portion disposed between two neighboring the concave portions, the concave portion formed by partially recessing a top surface of the overcoat layer inward;
an organic light-emitting diode having a first electrode in the concave portion, wherein the first electrode functions as a transparent electrode to allow light to pass through; and
an auxiliary organic light-emitting diode having an auxiliary electrode disposed on the convex portion, wherein the auxiliary electrode functions as a reflective electrode.

14. The organic light-emitting display of claim 13 , further comprising an upper color filter disposed on the organic light-emitting diode and the auxiliary organic light-emitting diode, and a lower color filter disposed on the substrate.

15. The organic light-emitting display of claim 14 , wherein the upper color filter and the lower color filter face each other.

16. The organic light-emitting display of claim 13 , wherein the plurality of auxiliary pixels is independently driven from the plurality of pixels.

17. The organic light-emitting display of claim 13 , wherein a driving signal of the plurality of auxiliary pixels is different from a driving signal of the plurality of pixels.

18. The organic light-emitting display of claim 12 , wherein the pixel includes a first electrode connected to a thin-film transistor, and
wherein the auxiliary electrode and the first electrode are separated from each other.

19. The organic light-emitting display of claim 18 , wherein a signal applied to the first electrode is different from a signal applied to the auxiliary electrode.

Assignees

• Lg Display Co Ltd

Inventors

• Choi Howon

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K59/805 Primary

  Electrodes · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H10D86/441 Primary

  Interconnections, e.g. scanning lines · CPC title