# US 10,483,499 B2 · Defect repairing method of flexible display panel

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- Number: US 10,483,499 B2
- Document ID: US10483499B2
- Status: Granted
- Kind: B2
- Application number: 15/968,279
- Filed: 2018-05-01
- Published: 2019-05-09
- Granted: 2019-11-19
- Earliest claimed: 2017-11-09
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Wei Wang; Xiaoguang Zhu
- Web page: https://patentgrep.com/patent/US10483499B2

## CPC

- H10K 77/111: {Flexible substrates}
- H10K 59/873: {Encapsulations}
- H10K 71/80: using temporary substrates
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 59/1201: {Manufacture or treatment}
- H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour
- H10K 71/861: {Repairing}
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure provides a defect repairing method of a flexible display panel including: providing a transparent substrate, the transparent substrate including a first surface and a second surface opposite to each other; forming a flexible substrate on the first surface; forming an array substrate layer on the surface of the flexible substrate, wherein the array substrate layer includes a display area and a peripheral area; irradiating the display area with a patterned laser on the second surface; and annealing the transparent substrate on which the array substrate layer and the flexible substrate are formed. The defect repairing method of the flexible display panel can quickly and easily repair various defects caused by the laser irradiation of the flexible display panel so as to optimize the display effect of the flexible display panel and improve the yield of the flexible display panel.

## Claims

### Claim 1

A defect repairing method of a flexible display panel, comprising:
providing a transparent substrate, the transparent substrate comprising a first surface and a second surface opposite to each other;
forming a flexible substrate on the first surface;
forming an array substrate layer on a surface of the flexible substrate, wherein the array substrate layer comprises a display area and a peripheral area;
irradiating the display area with a patterned laser on the second surface; and
annealing the transparent substrate on which the array substrate layer and the flexible substrate are formed,
wherein the step of irradiating the display area with a patterned laser on the second surface comprises, providing a mask having a pattern and attaching the mask to the second surface and irradiating the mask by an ultraviolet laser; separating the flexible substrate not blocked by the mask from the transparent substrate, and adhering the flexible substrate covered by the mask and the transparent substrate to each other, and
wherein the pattern of the mask makes a position on the transparent substrate not obscured by the mask directly opposite to the display area, the position blocked by the mask is directly opposite to the peripheral area.

### Claim 2 (depends on 1)

The defect repairing method of a flexible display panel according to claim 1, wherein the step of annealing the transparent substrate on which the array substrate layer and the flexible substrate are formed comprises, providing an annealing device, placing the flexible substrate in the annealing device, presetting a preset temperature and a preset constant temperature time; starting the annealing device to be heated, the annealing device reaching the preset temperature, and annealing the transparent substrate on which the array substrate layer and the flexible substrate are formed at the preset temperature and the preset constant temperature time.

### Claim 3 (depends on 1)

The defect repairing method of a flexible display panel according to claim 1, wherein after the step of annealing the flexible substrate, further comprising:
forming an organic light-emitting layer and an encapsulating layer sequentially on a surface of the array substrate layer to form a flexible display panel;
separating the transparent substrate located in the peripheral area and the flexible substrate.

### Claim 4 (depends on 3)

The defect repairing method of a flexible display panel according to claim 3, wherein in the step of separating the transparent substrate and the flexible substrate, a glass substrate and the flexible substrate are separated by a cutting method.

### Claim 5 (depends on 3)

The defect repairing method of a flexible display panel according to claim 3, wherein in the step of separating the transparent substrate and the flexible substrate, a glass substrate and the flexible substrate are separated by a laser separation technique.

### Claim 6 (depends on 1)

The defect repairing method of a flexible display panel according to claim 1, wherein the step of forming a flexible substrate on the first surface and forming an array substrate layer on a surface of the flexible substrate comprises uniformly coating a polymer solution on the first surface to form the flexible substrate.

### Claim 7 (depends on 2)

The defect repairing method of a flexible display panel according to claim 2, wherein the annealing device comprises a baking cavity and a heater located at one side of the baking cavity, the baking cavity is configured to heat the transparent substrate forming the array substrate layer and the flexible substrate, and the heater is configured to provide a heat source for heating.

### Claim 8 (depends on 7)

The defect repairing method of a flexible display panel according to claim 7, wherein the baking cavity is provided with a plurality of drawable brackets, and the brackets are arranged at equal distances from each other.