Organic light emitting display device including discharging hole

Patent metadata

Field	Value
Publication number	US-10916723-B2
Application number	US-201916591142-A
Country	US
Kind code	B2
Filing date	Oct 2, 2019
Priority date	Oct 29, 2018
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

An organic light emitting display device may include a base substrate including an emission area at which light is emitted and a peripheral area which is adjacent to the emission area; an encapsulation substrate disposed on the base substrate; a common layer between the base substrate and the encapsulation substrate, the common layer disposed in both the emission area and the peripheral area; between the base substrate and the common layer, each of: a planarization layer; a pixel electrode in the emission area; and a pixel defining layer; and a discharging hole disposed corresponding to the pixel defining layer, the discharging hole extending through the common layer.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a base substrate including an emission area at which light is emitted and a peripheral area which is adjacent to the emission area;
an encapsulation substrate disposed on the base substrate;
a common layer between the base substrate and the encapsulation substrate, the common layer disposed in both the emission area and the peripheral area;
between the base substrate and the common layer, each of:
a planarization layer;
a pixel electrode in the emission area; and
a pixel defining layer; and
a discharging hole disposed corresponding to the pixel defining layer, the discharging hole extending through the common layer,

wherein the discharging hole corresponding to the pixel defining layer extends through the common layer and the pixel defining layer, and exposes the planarization layer to outside the pixel defining layer and the common layer.

2. The organic light emitting display device of claim 1 , further comprising: a spacer disposed between the pixel defining layer and the common layer.

3. The organic light emitting display device of claim 1 , wherein the discharging hole corresponding to the pixel defining layer is in a vacuum state.

4. The organic light emitting display device of claim 2 , wherein along a same direction, a width of the spacer is less than a width of the pixel defining layer.

5. The organic light emitting display device of claim 2 , wherein the discharging hole corresponding to the pixel defining layer is spaced apart from an edge of the spacer by at least about 3 micrometers.

6. The organic light emitting display device of claim 1 , wherein a width of the discharging hole corresponding to the pixel defining layer is in a range from about 1 micrometer to about 100 micrometers.

7. The organic light emitting display device of claim 1 , wherein each of the planarization layer and the pixel defining layer includes an organic material.

8. The organic light emitting display device of claim 1 , further comprising:
a light emitting layer disposed on the pixel electrode in the emission area,
wherein the common layer includes a common electrode overlapping the light emitting layer.

9. The organic light emitting display device of claim 8 , wherein the common layer further includes a plurality of function layers with which the light is emitted at the emission area, the plurality of function layers comprising:
a first function layer disposed between the pixel electrode and the light emitting layer; and
a second function layer disposed between the light emitting layer and the common electrode.

10. The organic light emitting display device of claim 9 , wherein the common layer further includes a capping layer between the common electrode and the encapsulation substrate.

11. The organic light emitting display device of claim 1 , further comprising:
a thin film transistor disposed on the base substrate,
wherein the planarization layer covers the thin film transistor.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Junhee
• Kim Sungmin
• Ryu Min Yeul
• Jeon Woosik
• Jung Da-Young

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/871 Primary

  Self-supporting sealing arrangements · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title