Organic light emitting display panel and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9972805-B2
Application number	US-201313872689-A
Country	US
Kind code	B2
Filing date	Apr 29, 2013
Priority date	Oct 31, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

An organic light emitting display panel includes a light emitting diode array substrate and an encapsulation substrate adhered to the light emitting array diode substrate by an adhesive film. The light emitting array diode substrate includes a driving thin film transistor formed on a substrate, an organic light emitting diode including a first electrode connected to the driving thin film transistor, an organic emission layer formed on the first electrode, and a second electrode formed on the organic emission layer, and first and second passivation layers formed on the second electrode. In this regard, the first passivation layer is formed of an organic compound having at least one of the structural formulae described in Formula 1 below:

wherein R1, R2, R3, R4, R5, and R6 are each independently selected from substituted or unsubstituted C 6 -C 40 aromatic groups.

First claim

What is claimed is:

1. An organic light emitting display comprising:
a driving thin film transistor on a substrate, the driving thin film transistor including an active layer having a channel region and source and drain regions on the substrate, a gate insulating layer on the substrate with the active layer, a gate electrode on the gate insulating layer and over the channel region, an interlayer insulating layer on the gate insulating layer with the gate electrode, and source and drain electrodes on the interlayer insulating layer to contact with the source and drain regions;
a storage capacitor on the substrate, the storage capacitor including a lower storage electrode, an upper storage electrode and the gate insulating layer between the lower storage electrode and the upper storage electrode;
an organic light emitting diode comprising a first electrode connected to the driving thin film transistor, an organic emission layer on the first electrode, and a second electrode on the organic emission layer;
a first passivation layer formed on the second electrode of the organic light emitting diode; and
a second passivation layer formed on the first passivation layer;
a light emitting diode array substrate including the driving thin film transistor, the organic light emitting diode, the first passivation and second passivation layers; and
an encapsulation substrate adhered to the second passivation layer of the light emitting diode array substrate by an adhesive film,
wherein the first passivation layer is formed of an organic compound, having at least one of the structural formulae described in Formula 1 below:

wherein R1, R2, R3, R4, R5, and R6 are each independently selected from substituted or unsubstituted C 6 -C 40 aromatic groups.

2. The organic light emitting display according to claim 1 , wherein the first passivation layer is entirely on the organic emission layer and the second electrode to cover side surfaces of the organic emission layer and the second electrode.

3. The organic light emitting display according to claim 1 , wherein the organic compound having at least one of the structural formulae of Formula 1 is selected from HM-01 through HM-65:

4. A method of manufacturing an organic light emitting display, the method comprising:
forming a driving thin film transistor on a substrate, the driving thin film transistor including an active layer having a channel region and source and drain regions on the substrate, a gate insulating layer on the substrate with the active layer, a gate electrode on the gate insulating layer and over the channel region, an interlayer insulating layer on the gate insulating layer with the gate electrode, and source and drain electrodes on the interlayer insulating layer to contact with the source and drain regions;
forming a storage capacitor on the substrate, the storage capacitor including a lower storage electrode, an upper storage electrode and the gate insulating layer between the lower storage electrode and the upper storage electrode;
forming a first electrode to be connected to the driving thin film transistor;
forming an organic emission layer and a second electrode on the first electrode;
forming a first passivation layer on the second electrode;
forming a second passivation layer over the substrate with the first passivation layer formed thereon; and
adhering a light emitting diode array substrate including thereon the driving thin film transistor, the first electrode, the organic emission layer, the second electrode, the first passivation layer, and the second passivation layer to an encapsulation substrate by an adhesive film,
wherein the first passivation layer is formed of an organic compound having at least one of the structural formulae described in Formula 1 below:

wherein R1, R2, R3, R4, R5, and R6 are each independently selected from substituted or unsubstituted C 6 -C 40 aromatic groups.

5. The method according to claim 4 , wherein the first passivation layer is formed over the second electrode.

6. The method according to claim 5 , wherein the first passivation layer is formed by deposition using the same mask as that used to form the organic emission layer and the second electrode.

7. The method according to claim 4 , wherein the first passivation layer is entirely formed on the organic emission layer and the second electrode to cover side surfaces of the organic emission layer and the second electrode.

8. The method according to claim 4 , wherein the organic compound having at least one of the structural formulae of Formula 1 is selected from HM-01 through HM-65:

Assignees

• Lg Display Co Ltd

Inventors

• Seo Jeong-Dae
• Han Chang-Wook
• Tak Yoon-Heung
• Kim Hyo-Seok

Classifications

• H01L51/0058

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic

• H01L51/006

  Electricity · mapped topic

• H01L27/3244

  Electricity · mapped topic

• H10K59/873

  Encapsulations · CPC title