Light emitting display apparatus and multi-screen display apparatus including the same

Patent metadata

Field	Value
Publication number	US-12048188-B2
Application number	US-202117527744-A
Country	US
Kind code	B2
Filing date	Nov 16, 2021
Priority date	Nov 17, 2020
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A light emitting display apparatus includes a substrate, a passivation layer disposed over the substrate, a light emitting device layer including a light emitting layer disposed over the passivation layer, a non-emission pattern portion including a light emitting material pattern disposed over the passivation layer at a periphery portion of the substrate and electrically isolated from the light emitting layer, and an encapsulation layer disposed over the light emitting device layer and the non-emission pattern portion. The encapsulation layer may wholly surround the non-emission pattern portion and seals an interface between the non-emission pattern portion and the passivation layer.

First claim

What is claimed is:

1. A light emitting display apparatus comprising:
a substrate;
a passivation layer disposed over the substrate;
a light emitting device layer including a light emitting layer disposed over the passivation layer;
a non-emission pattern portion including a light emitting material pattern disposed over the passivation layer at a periphery portion of the substrate and electrically isolated from the light emitting layer; and
an encapsulation layer disposed over the light emitting device layer and the non-emission pattern portion,
wherein the encapsulation layer wholly surrounds the non-emission pattern portion and seals an interface between the non-emission pattern portion and the passivation layer.

2. The light emitting display apparatus of claim 1 , wherein the encapsulation layer comprises:
a first inorganic encapsulation layer wholly surrounding the non-emission pattern portion and sealing an interface between the non-emission pattern portion and the passivation layer; and
a second inorganic encapsulation layer disposed over the first inorganic encapsulation layer to seal an interface between the first inorganic encapsulation layer and the passivation layer.

3. The light emitting display apparatus of claim 2 ,
wherein the first inorganic encapsulation layer directly contacts a surface of the passivation layer disposed near the non-emission pattern portion, and
wherein the second inorganic encapsulation layer directly contacts a surface of the passivation layer disposed near the first inorganic encapsulation layer.

4. The light emitting display apparatus of claim 1 , wherein the encapsulation layer comprises:
a first inorganic encapsulation layer disposed over the light emitting layer and the non-emission pattern portion; and
a second inorganic encapsulation layer disposed over the first inorganic encapsulation layer, and
the non-emission pattern portion is doubly sealed by the first inorganic encapsulation layer and the second inorganic encapsulation layer, over the passivation layer.

5. The light emitting display apparatus of claim 1 , further comprising a planarization layer disposed between the passivation layer and the light emitting device layer,
wherein the light emitting device layer comprises:
a pixel electrode disposed between the planarization layer and the light emitting layer; and
a common electrode disposed over the light emitting layer, and
wherein the non-emission pattern portion further comprises a common electrode pattern electrically isolated from the common electrode to wholly surround the light emitting material pattern.

6. The light emitting display apparatus of claim 5 ,
wherein the common electrode pattern directly contacts a surface of the passivation layer disposed near the light emitting material pattern, and
wherein the light emitting material pattern is at least doubly sealed by the common electrode pattern and the encapsulation layer, over the passivation layer.

7. The light emitting display apparatus of claim 5 , wherein the encapsulation layer comprises:
a first inorganic encapsulation layer wholly surrounding the non-emission pattern portion and sealing an interface between the common electrode pattern and the passivation layer; and
a second inorganic encapsulation layer disposed over the first inorganic encapsulation layer to seal an interface between the first inorganic encapsulation layer and the passivation layer.

8. The light emitting display apparatus of claim 1 ,
wherein the non-emission pattern portion comprises at least two non-emission patterns including the light emitting material pattern, and
wherein the encapsulation layer wholly surrounds each of the at least two non-emission patterns and directly contacts a surface of the passivation layer between the at least two non-emission patterns.

9. The light emitting display apparatus of claim 8 , wherein the encapsulation layer has a first thickness over each of the at least two non-emission patterns, and has a second thickness which is thinner than the first thickness, between the at least two non-emission patterns.

10. The light emitting display apparatus of claim 8 , wherein the encapsulation layer further comprises:
a first inorganic encapsulation layer wholly surrounding each of the at least two non-emission patterns and sealing an interface between each of the at least two non-emission patterns and the passivation layer;
a second inorganic encapsulation layer disposed over the first inorganic encapsulation layer to seal an interface between the first inorganic encapsulation layer and the passivation layer; and
a third inorganic encapsulation layer disposed over the second inorganic encapsulation layer and between the at least two non-emission patterns to directly contact a surface of the passivation layer between the at least two non-emission patterns.

11. The light emitting display apparatus of claim 1 ,
wherein the light emitting device layer further comprises a common electrode disposed over the light emitting layer,
wherein the non-emission pattern portion comprises at least two non-emission patterns electrically isolated from the light emitting material pattern and the common electrode to wholly surround the light emitting material pattern, and
wherein the encapsulation layer further comprises:
a first inorganic encapsulation layer wholly surrounding each of the at least two non-emission patterns and sealing an interface between each of the at least two non-emission patterns and the passivation layer;
a second inorganic encapsulation layer disposed over the first inorganic encapsulation layer to seal an interface between the first inorganic encapsulation layer and the passivation layer; and
a third inorganic encapsulation layer disposed over the second inorganic encapsulation layer and between the at least two non-emission patterns to directly contact a surface of the passivation layer between the at least two non-emission patterns.

12. The light emitting display apparatus of claim 1 , further comprising a trench pattern portion disposed over the passivation layer between the light emitting layer and the non-emission pattern portion to isolate the light emitting layer,
wherein the trench pattern portion comprises a light emitting material pattern electrically isolated from the light emitting layer.

13. The light emitting display apparatus of claim 12 , wherein the trench pattern portion comprises a protrusion tip of a metal material for isolating the light emitting layer.

14. The light emitting display apparatus of claim 12 , wherein the trench pattern portion comprises:
a first trench structure disposed over the passivation layer; and
a second trench structure disposed over the first trench structure to have an eaves structure with respect to the first trench structure.

15. The light emitting display apparatus of claim 12 , further comprising a dam pattern portion disposed over the passivation layer between the non-emission pattern portion and the trench pattern portion,
wherein the dam pattern portion comprises a light emitting material pattern electrically isolated from the light emitting layer, and
wherein the encapsulation layer comprises an organic encapsulation layer disposed over the light emitting layer and the trench pattern portion and surrounded by the dam pattern portion.

16. The light emitting display apparatus of claim 1 , further comprising a dam pattern portion disposed over the passivation layer between the light emitting layer and the non-emission pattern portion,
wherein the dam pattern portion compris

Assignees

• Lg Display Co Ltd

Inventors

• Hwang Insu
• Shin Jeongha
• Lee Jaehyuk
• Jang Hyeongwook
• Lee Sinwoo
• Won Juyeon

Classifications

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K71/00

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

• H10K59/18

  Tiled displays · CPC title