Method of treating a glass surface and treated glass articles

Patent metadata

Field	Value
Publication number	US-11885998-B2
Application number	US-202117759938-A
Country	US
Kind code	B2
Filing date	Feb 1, 2021
Priority date	Feb 7, 2020
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A display backlight unit is disclosed including a glass substrate with a first major surface and a second major surface opposite the first major surface, the first major surface coated with at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA, and a plurality of PMMA-containing light extraction dots deposited on the coated first major surface.

First claim

What is claimed is:

1. A display backlight unit, comprising:
a glass substrate comprising a first major surface and a second major surface opposite the first major surface, the first major surface directly coated with at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA, and a plurality of light extraction dots comprising PMMA deposited on the coated first major surface.

2. The display backlight unit of claim 1 , further comprising a light source positioned along at least one edge surface of the glass substrate.

3. The display backlight unit of claim 2 , wherein a spatial density, a diameter, or a combination thereof, of the light extraction dots increases in a direction away from the light source.

4. The display backlight unit of claim 1 , wherein the coating is covalently bonded to the first major surface.

5. The display backlight unit of claim 1 , wherein a thickness of the glass substrate is in a range from about 300 micrometers to about 2.0 millimeters.

6. The display backlight unit of claim 1 wherein a thickness of the coating is equal to or less than about 500 nanometers.

7. The display backlight unit of claim 6 , wherein the thickness of the coating is equal to or less than about 100 nanometers.

8. The display backlight unit of claim 7 , wherein the thickness of the coating is equal to or less than about 20 nanometers.

9. The display backlight unit of claim 1 , wherein after exposure at 60° C. and 90% relative humidity for 240 hours, a color shift dy exhibited by the glass substrate is less than about 0.007 per 300 mm path length through the glass substrate and luminance changes by less than 10%.

10. A display device comprising the display backlight unit of claim 1 , the display device comprising a display panel positioned adjacent to the display backlight unit.

11. The display backlight unit of claim 1 , wherein the coating of the at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA on the first major surface of the glass substrate is not removable from the glass substrate after curing.

12. A method of making a backlight unit, comprising:
directly coating a first major surface of a glass substrate with at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA;
depositing a plurality of PMMA-containing light extraction dots on the coated first major surface.

13. The method of claim 12 , further comprising heating the glass substrate to a temperature in a range from about 40° C. to about 65° C. for a time in a range from about 10 minutes to about 20 minutes after coating the first major surface but before depositing the plurality of PMMA-containing light extraction dots.

14. The method of claim 13 , further comprising heating the glass substrate to a temperature in a range from about 150° C. to about 200° C. for a time in a range from about 5 minutes to about 40 minutes after the depositing the plurality of PMMA-containing light extraction dots.

15. The method of claim 13 , wherein the coating of the at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA to the first major surface of the glass substrate is not removable from the glass substrate after curing.

16. A display backlight unit, comprising:
a glass substrate comprising a first major surface and a second major surface opposite the first major surface, the first major surface coated with at least one of 3-mercaptopropyl trimethoxysilane, aminopropyl triethoxysilane, or silanated PMMA, and a plurality of light extraction dots comprising PMMA deposited on the coated first major surface,
wherein after exposure at 60° C. and 90% relative humidity for 240 hours, a color shift dy exhibited by the glass substrate is less than about 0.007 per 300 mm path length through the glass substrate and luminance changes by less than 10%.

17. The display backlight unit of claim 16 , further comprising a light source positioned along at least one edge surface of the glass substrate.

18. The display backlight unit of claim 17 , wherein a spatial density, a diameter, or a combination thereof, of the light extraction dots increases in a direction away from the light source.

19. The display backlight unit of claim 16 , wherein a thickness of the glass substrate is in a range from about 300 micrometers to about 2.0 millimeters.

20. The display backlight unit of claim 16 , wherein a thickness of the coating is equal to or less than about 500 nanometers.

Assignees

• Corning Inc

Inventors

• Banerjee Joy
• Bhattacharyya Indrani
• Mazumder Prantik
• Walczak Wanda Janina

Classifications

• G02B6/0043 Primary

  provided on the surface of the light guide · CPC title

• C03C17/3405

  with at least two coatings of organic materials (C03C17/36, C03C17/42 take precedence) · CPC title

• G02B6/0061

  to provide homogeneous light output intensity · CPC title

• G02B6/0065 Primary

  Manufacturing aspects; Material aspects · CPC title

• C03C2218/32

  After-treatment · CPC title