Cover glass with reinforcement for display or touch panels

Patent metadata

Field	Value
Publication number	US-12393071-B2
Application number	US-201917270305-A
Country	US
Kind code	B2
Filing date	Aug 12, 2019
Priority date	Aug 20, 2018
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

Embodiments of a vehicle interior system and methods of forming the same are disclosed. The vehicle interior system includes a base having a curved surface, a display disposed on the curved surface, and a cover glass disposed on the display. The cover glass has a first region including a first major surface, a second major surface opposite the first major surface, and a first thickness defined as a distance between the first major surface and the second major surface. The cover glass also has a second region including the first major surface, a third major surface opposite the first major surface, and a second thickness defined as a distance between the first major surface and the third major surface. The display is attached to the third major surface, and the second region corresponds to a touch-sensitive region of the display. The second thickness is greater than the first thickness.

First claim

What is claimed is:

1. A vehicle interior system, comprising:
a base comprising a curved surface;
a display disposed on the curved surface; and
a cover glass disposed on the display, the cover glass comprising:
a first region comprising a first major surface, a second major surface opposite the first major surface, and a first thickness defined as a distance between the first major surface and the second major surface; and
a second region comprising the first major surface, a third major surface opposite the first major surface, and a second thickness defined as a distance between the first major surface and the third major surface; and

wherein the display is attached to the third major surface, the second region corresponding to a touch-sensitive region of the display,
wherein the second thickness is greater than the first thickness,
wherein the cover glass is curved in at least the first region,
wherein the first region comprises a reverse curve in which radii of curvature in different directions meet at an inflection line, the inflection line delineating a boundary between concave and convex curves of the first major surface where a curvature of the first major surface changes sign.

2. The vehicle interior system of claim 1 , wherein the cover glass further comprises, in the second region, a first glass substrate comprising the first major surface and a second glass substrate comprising the third major surface.

3. The vehicle interior system of claim 2 , wherein at least one of the first and second glass substrates is strengthened.

4. The vehicle interior system of claim 2 , wherein the cover glass comprises a polymer interlayer between the first and second glass substrates.

5. The vehicle interior system of claim 2 , wherein the cover glass comprises, in the first region, the first glass substrate but not the second glass substrate.

6. The vehicle interior system of claim 2 , the second glass substrate further comprises a fourth surface opposite the third major surface, and a third thickness defined as a distance between the third major surface and the fourth surface,
wherein the third thickness is less than 1.1 mm,
wherein the display is attached to the third major surface by an optically clear adhesive,
wherein the optically clear adhesive comprises a thickness that is at least 0.25 mm and less than 1.0 mm,
wherein the second thickness is greater than or equal to 0.7 mm and less than or equal to 1.5 mm, the optically clear adhesive comprises a Young's modulus that is greater than or equal to 10 kPa and less than or equal to 48 kPa.

7. The vehicle interior system of claim 1 , wherein the second thickness is greater than 1.1 mm and the first thickness is in a range from about 0.1 mm to about 1.1 mm.

8. The vehicle interior system of claim 1 , wherein the display is curved.

9. The vehicle interior system of claim 1 , wherein the cover glass is a cold-formed cover glass.

10. The vehicle interior system of claim 1 , wherein, when a user of the vehicle interior system touches the first major surface in the second region, the vehicle interior system does not exhibit mura.

11. The vehicle interior system of claim 1 , wherein the vehicle interior system exhibits a touch mura visibility factor of less than or equal to 0.05, when the touch panel registers a touch by a user exerting a force on the first major surface of about 5 N or greater.

12. The vehicle interior system of claim 11 , wherein a surface area of contact between the first major surface and the touch has a diameter of about 10 mm.

13. The vehicle interior system of claim 1 , wherein the cover glass is strengthened and comprises an alkali aluminosilicate glass, an alkali boroaluminosilicate glass, or a soda lime glass.

14. The vehicle interior system of claim 1 , wherein the first thickness is about 0.1 mm to 0.3 mm.

15. The vehicle interior system of claim 1 , wherein the second region is not curved.

16. The vehicle interior system of claim 1 , wherein the first region is curved via cold-forming.

17. The vehicle interior system of claim 1 , wherein the first region comprises a radius of curvature from 20 mm to 250 mm.

18. The vehicle interior system of claim 1 , wherein the cover glass comprises two thick regions separated by the first region, wherein the second region is one of the two thick regions.

19. The vehicle interior system of claim 18 , wherein each of the two thick regions are laminated glass regions where second glass substrates are laminated to the cover glass.

20. The vehicle interior system of claim 18 , wherein the first region comprises a locally thinned region of the cover glass so that the cover glass is a monolithic glass substrate having a variable thickness.

Assignees

• Corning Inc

Inventors

• Kumar Atul
• Li Cheng-Chung
• Mou Jinfa
• Poissy Stephane

Classifications

• B32B2457/208

  Touch screens · CPC title

• B32B2605/00

  Vehicles · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B17/10

  of synthetic resin · CPC title

• B60K37/20

  Dashboard panels · CPC title