Method of repairing glass for display device

Patent metadata

Field	Value
Publication number	US-12428339-B2
Application number	US-202217868705-A
Country	US
Kind code	B2
Filing date	Jul 19, 2022
Priority date	Jul 20, 2021
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A method of repairing a glass of a display device includes disposing the glass including a first surface, a second surface opposite to the first surface, and a scratch formed on the first surface, the scratch facing toward a gravitational direction, disposing a heating plate on the first surface of the glass, and irradiating a laser on the second surface. A transmittance rate of the laser passing through the glass is greater than an absorption rate of the laser being absorbed in the glass. A portion of the laser irradiated to the second surface reaches the heating plate. The laser reaching the heating plate generates heat. Heat is transmitted to the glass. A portion of the glass adjacent to the scratch is melted by the heat. The portion of the melted glass fills the scratch.

First claim

What is claimed is:

1. A method of repairing a glass for a display device, the method comprising:
providing the glass comprising a first surface, a second surface opposite to the first surface, and a scratch formed on the first surface;
positioning the glass such that the scratch of the glass faces toward a gravitational direction; and
irradiating a laser on the second surface of the glass to repair the glass,
wherein the laser irradiates the scratch and portions of the first surface around the scratch.

2. The method of claim 1 , wherein a transmittance rate of the laser passing through the glass is greater than an absorption rate of the laser being absorbed in the glass.

3. The method of claim 2 , wherein the laser comprises at least one of a ruby laser, a glass laser, an Nd: YAG laser, a helium-neon laser, an argon laser, a copper vaporized laser, and an excimer laser.

4. The method of claim 1 , further comprising:
disposing a heating plate on the first surface of the glass to overlap the scratch of the glass.

5. The method of claim 4 , wherein a melting point of the heating plate is higher than a melting point of the glass.

6. The method of claim 5 , wherein the heating plate comprises at least one of aluminum oxide, molybdenum, tungsten, a nickel-iron alloy, and stainless steel.

7. The method of claim 4 , wherein a thermal expansion coefficient of the heating plate is less than a thermal expansion coefficient of the glass.

8. The method of claim 4 , wherein a thermal conductivity of the heating plate is greater than a thermal conductivity of the glass.

9. The method of claim 4 , wherein a size of the heating plate is greater than a size of the scratch of the glass.

10. The method of claim 4 , wherein the heating plate is mirror-like finished.

11. The method of claim 4 , wherein the heating plate is reflection-resistance treated.

12. A method of repairing a glass for a display device, the method comprising:
providing the glass comprising a first surface and a second surface opposite to the first surface, and a scratch formed on the first surface;
disposing a heating plate on the first surface of the glass; and
irradiating a laser on the second surface of the glass to repair the glass,
wherein a transmittance rate of the laser passing through the glass is greater than an absorption rate of the laser being absorbed in the glass, and
wherein the laser irradiates the scratch and portions of the first surface around the scratch.

13. The method of claim 12 , wherein the laser comprises at least one of a ruby laser, a glass laser, an Nd: YAG laser, a helium-neon laser, an argon laser, a copper vaporized laser, and an excimer laser.

14. The method of claim 12 , wherein a melting point of the heating plate is higher than a melting point of the glass.

15. The method of claim 14 , wherein the heating plate comprises at least one of aluminum oxide, molybdenum, tungsten, a nickel-iron alloy, and stainless steel.

16. The method of claim 12 , wherein a thermal expansion coefficient of the heating plate is less than a thermal expansion coefficient of the glass.

17. The method of claim 12 , wherein a thermal conductivity of the heating plate is greater than a thermal conductivity of the glass.

18. The method of claim 12 , wherein a size of the heating plate is greater than a size of the scratch of the glass.

19. The method of claim 12 , wherein the heating plate is mirror-like finished.

20. The method of claim 12 , wherein the heating plate is reflection-resistance treated.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jaeho
• Kim Mincheol
• Baek Myunghun
• You Sookkyung
• Cho Hyun-Il

Classifications

• C03C23/0025 Primary

  by a laser beam · CPC title