OLED display device

Patent metadata

Field	Value
Publication number	US-10840477-B2
Application number	US-201816315638-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Sep 20, 2018
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An organic light emitting diode (OLED) display device includes a flexible substrate, a thin-film transistor (TFT) layer, an OLED light emitting layer, a barrier layer, and an encapsulation layer. The encapsulation layer covers the barrier layer, and a portion of the encapsulation layer located at an outside of the barrier layer includes a first inorganic layer and a second inorganic layer. A protection layer is disposed on a portion of the first inorganic layer over surface the barrier layer, and the protection layer completely covers the barrier layer.

First claim

What is claimed is:

1. An organic light emitting diode (OLED) display device, comprising:
a flexible substrate;
a thin-film transistor (TFT) layer disposed on the flexible substrate;
an OLED light emitting layer disposed on the TFT layer;
a barrier layer disposed on the TFT layer; and
an encapsulation layer covering the barrier layer, and a portion of the encapsulation layer located at an outside of the barrier layer comprising a first inorganic layer and a second inorganic layer;
wherein a protection layer is disposed on a portion of the first inorganic layer over a surface of the barrier layer, the protection layer completely covers the barrier layer, and the protection layer has a hydrophobicity greater than a hydrophobicity of the first inorganic layer.

2. The OLED display device of claim 1 , wherein the protection layer is made of monocrystalline silicon.

3. The OLED display device of claim 1 , wherein the first inorganic layer is made of one or a combination of at least two of silicon nitride, silicon dioxide, aluminum oxide, titanium dioxide, and zirconium dioxide.

4. The OLED display device of claim 3 , wherein the second inorganic layer is made of a same material as that of the first inorganic layer.

5. The OLED display device of claim 1 , wherein a portion of the encapsulation layer located at an inside of the barrier layer comprises the first inorganic layer, an organic layer, and the second inorganic layer.

6. The OLED display device of claim 5 , wherein the organic layer has a thickness greater than that of the first inorganic layer, and the second inorganic layer has a same thickness as that of the first inorganic layer.

7. The OLED display device of claim 5 , wherein the barrier layer has a thickness less than that of the organic layer, and the thickness of the barrier layer is greater than that of the first inorganic layer.

8. The OLED display device of claim 5 , wherein the organic layer is formed on the first inorganic layer through an ink jet printing process.

9. The OLED display device of claim 8 , wherein the ink jet printing process is performed with an organic ink consisting of acid ester organic matter, acid organic matter, and photopolymerization initiator.

10. An organic light emitting diode (OLED) display device, comprising:
a flexible substrate;
a thin-film transistor (TFT) layer disposed on the flexible substrate;
an OLED light emitting layer disposed on the TFT layer;
a barrier layer disposed on the TFT layer; and
an encapsulation layer covering the barrier layer, and a portion of the encapsulation layer located at an outside of the barrier layer comprising a first inorganic layer and a second inorganic layer;
wherein a protection layer is disposed on a portion of the first inorganic layer over a surface of the barrier layer, and the protection layer completely covers the barrier layer;
wherein the protection layer is made of monocrystalline silicon.

11. The OLED display device of claim 10 , wherein the first inorganic layer is made of one or a combination of at least two of silicon nitride, silicon dioxide, aluminum oxide, titanium dioxide, and zirconium dioxide.

12. The OLED display device of claim 11 , wherein the second inorganic layer is made of a same material as that of the first inorganic layer.

13. An organic light emitting diode (OLED) display device, comprising:
a flexible substrate;
a thin-film transistor (TFT) layer disposed on the flexible substrate;
an OLED light emitting layer disposed on the TFT layer;
a barrier layer disposed on the TFT layer; and
an encapsulation layer covering the barrier layer, and a portion of the encapsulation layer located at an outside of the barrier layer comprising a first inorganic layer and a second inorganic layer;
wherein a portion of the encapsulation layer located at an inside of the barrier layer comprises the first inorganic layer, an organic layer, and the second inorganic layer, and the organic layer is formed on the first inorganic layer through an ink jet printing process;
wherein a protection layer is disposed on a portion of the first inorganic layer over a surface of the barrier layer and completely covers the barrier layer, wherein the ink jet printing process is performed with an organic ink consisting of acid ester organic matter, acid organic matter, and photopolymerization initiator.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Zhao Zhenyu
• Li Hui
• Huang mang

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10H20/853

  characterised by their shape · CPC title

• Y02E10/549

  Organic PV cells · CPC title