Flexible display panel, and display device having thin film packaging layer with protrusions

Patent metadata

Field	Value
Publication number	US-11444263-B2
Application number	US-201916765052-A
Country	US
Kind code	B2
Filing date	Oct 12, 2019
Priority date	Nov 2, 2018
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A flexible display panel. The flexible display panel includes: a flexible substrate; a display element arranged on the flexible substrate; and a packaging layer covering the display element, the packaging layer including an inorganic thin film and an organic thin film that are stacked alternately, in which two protrusion structures that are engaged with each other are arranged between at least two adjacent thin films of the packaging layer.

First claim

What is claimed is:

1. A flexible display panel, comprising:
a flexible substrate;
a display element arranged on the flexible substrate; and
a packaging layer covering the display element, the packaging layer comprising an inorganic thin film and an organic thin film that are stacked alternately, and comprising a first inorganic thin film, an organic thin film, and a second inorganic thin film that are stacked sequentially,
wherein two protrusion structures that are engaged with each other are arranged between at least two adjacent thin films of the packaging layer, and a longitudinal section of each protrusion perpendicular to the flexible substrate is a semi-ellipse or a semi-circle,
wherein a first protrusion structure and a second protrusion structure that are engaged with each other are arranged between the first inorganic thin film and the organic thin film, and the first protrusion structure and the first inorganic thin film are of an integrated structure,
wherein a third protrusion structure and a fourth protrusion structure that are engaged with each other are arranged between the organic thin film and the second inorganic thin film, and the third protrusion structure and the organic thin film are of an integrated structure.

2. The flexible display panel of claim 1 , wherein the protrusion structure comprises a plurality of protrusions arranged in an array.

3. A display device, comprising the flexible display panel of claim 1 .

4. The display device of claim 3 , wherein the protrusion structure comprises a plurality of protrusions arranged in an array.

5. A method for packaging a flexible display panel, wherein the flexible display panel comprises:
a flexible substrate;
a display element arranged on the flexible substrate; and
a packaging layer covering the display element, the packaging layer comprising an inorganic thin film and an organic thin film that are stacked alternately, and comprising a first inorganic thin film, an organic thin film, and a second inorganic thin film that are stacked sequentially,
wherein two protrusion structures that are engaged with each other are arranged between at least two adjacent thin films of the packaging layer, and a longitudinal section of each protrusion perpendicular to the flexible substrate is a semi-ellipse or a semi-circle,
wherein a first protrusion structure and a second protrusion structure that are engaged with each other are arranged between the first inorganic thin film and the organic thin film, and the first protrusion structure and the first inorganic thin film are of an integrated structure,
wherein a third protrusion structure and a fourth protrusion structure that are engaged with each other are arranged between the organic thin film and the second inorganic thin film, and the third protrusion structure and the organic thin film are of an integrated structure,
the method comprising:
alternately depositing an inorganic thin film and an organic thin film on a display element arranged on a flexible substrate to form a packaging layer covering the display element; and
forming two protrusion structures that are engaged with each other between at least two adjacent thin films of the packaging layer.

6. The method of claim 5 , wherein the alternately depositing the inorganic thin film and the organic thin film comprises: sequentially depositing a first inorganic thin film, depositing an organic thin film, and depositing a second inorganic thin film.

7. The method of claim 6 , wherein the depositing the first inorganic thin film comprises: depositing a first inorganic thin film integrated with the first protrusion structure on the display element arranged on the flexible substrate.

8. The method of claim 6 , wherein the depositing the organic thin film comprises: depositing an organic thin film integrated with the third protrusion structure on the first inorganic thin film.

Assignees

• Ordos Yuansheng Optoelectronics Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Meng Xiaodong
• Ma Lingling
• Li Zihua
• Wen Zhibo
• Liu Hengbo
• Yuan Yu
• Cai Lu
• Xu Dong
• Xu Guofang
• Gao Xinpeng
• Wang Qiang
• Zhang Ruiqing
• Guo Qiang
• Jin Wenqiang
• Wang Xudong

Classifications

• G09F9/30

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8731

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

• H10K50/844

  Encapsulations · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title