Light guide-based deadfront for display, related methods and vehicle interior systems

Patent metadata

Field	Value
Publication number	US-11772491-B2
Application number	US-201816646756-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 13, 2017
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

Embodiments of a deadfront article for a display are disclosed herein. The deadfront article includes a cover structure having: an inner surface; an outer surface opposite the inner surface; a glass layer located between the inner surface and the outer surface; and a first layer of light transmitting ink or pigment located between the inner surface of the cover structure and the glass layer. The deadfront article also includes a light guide layer having: an inner surface; and an outer surface facing toward the inner surface of the cover structure. A light extraction layer located on at least one of the inner surface and the outer surface of the light guide layer.

First claim

What is claimed is:

1. A deadfront article for a display comprising:
a cover structure comprising:
an inner surface;
an outer surface opposite the inner surface;
a glass layer located between the inner surface and the outer surface; and
a first layer of light transmitting ink or pigment located between the inner surface of the cover structure and the glass layer;

a light guide layer comprising:
an inner surface; and
an outer surface facing toward the inner surface of the cover structure; and

a light extraction layer located on at least one of the inner surface and the outer surface of the light guide layer, wherein:
the first layer of light transmitting ink or pigment is configured to provide a colored or patterned appearance to the deadfront article from the outer surface when light from a light source is not provided to the light extraction layer, and
the first layer of light transmitting ink or pigment is configured to allow viewing of the light from the outer surface when the light is extracted from the light guide layer by the light extraction layer.

2. The deadfront article of claim 1 , wherein the light extraction layer is formed from an ink material having an opacity, where the opacity of the ink material is less than a threshold that is related to a transmissivity of light through the cover structure layer.

3. The deadfront article of claim 2 , wherein the transmissivity of light through the cover structure is greater than 90% and the opacity of the ink material of the light extraction layer is less than 10%.

4. The deadfront article of claim 2 , wherein the transmissivity of light through the cover structure is 90% and the opacity of the ink material of the light extraction layer is 10%.

5. The deadfront article of claim 2 , wherein the transmissivity of the cover structure is between 20% and 40% and the opacity of the ink material of the light extraction layer is less than 75%.

6. The deadfront article of claim 2 , wherein the ink material is a white ink material having an average thickness in a range of 0.05 μm to 500 μm.

7. The deadfront article of claim 1 , wherein the cover structure has a light transmittance level less than 50% such that when a light source of the display is inactive the first layer of light transmitting ink or pigment is visible from outside of the cover structure and blocks the visibility of the light extraction layer from outside of the cover structure.

8. The deadfront article of claim 1 , wherein a total level of light transmission through all layers of the glass layer is between 5%-10% for light having wavelengths from 400 nm to 700 nm.

9. The deadfront article of claim 1 , wherein the glass layer of the cover structure comprises an average thickness between the inner and outer surfaces in a range from 0.05 mm to 2 mm.

10. The deadfront article of claim 1 , wherein an average thickness between the inner and outer surfaces of the light guide layer is less than an average thickness of the glass layer of the cover structure.

11. The deadfront article of claim 1 , wherein the glass layer of the cover structure is formed from a strengthened glass material, and the light guide layer is formed from at least one of a glass material and a polymer material.

12. The deadfront article of claim 1 , wherein the cover structure is curved comprising a first radius of curvature.

13. The deadfront article of claim 1 , wherein the cover structure is cold-formed to the curved shape.

14. The vehicle interior system of claim 1 , wherein the cover glass layer comprises a first layer of light transmitting ink or pigment located between the cover glass layer and the glass light guide layer.

15. The vehicle interior system of claim 14 , wherein the first layer of light transmitting ink or pigment has a light transmittance level less than 50% such that when the first light source is inactive the first layer of light transmitting ink or pigment is visible from outside of the cover glass layer and blocks the visibility of the light extraction layer from outside of the cover glass layer.

16. A vehicle interior system comprising:
a cover glass layer;
a glass light guide layer located below the cover glass layer;
a light extraction layer located on a surface of the glass light guide layer, wherein the light extraction layer forms a pattern corresponding to a display graphic; and
a first light source optically coupled to the glass light guide layer such that light from the first light source is carried within the glass light guide layer via total internal reflection;
wherein, when the first light source is activated, the light within the glass light guide layer is extracted out by the light extraction layer in the shape of the display graphic which is visible through the cover glass layer.

17. The vehicle interior system of claim 16 , wherein the pattern formed by the light extraction layer is not visible through the cover glass layer when the first light source is inactive.

18. The vehicle interior system of claim 16 , wherein the glass light guide layer comprises:
an inner major surface;
an outer major surface; and
an edge surface extending between outer perimeters of the inner major surface and the outer major surface;
wherein the first light source is optically coupled to the edge surface of the glass light guide layer.

19. The vehicle interior system of claim 16 , further comprising a second light source optically coupled to the glass light guide layer such that light from the second light source is carried within the glass light guide layer via total internal reflection, wherein the first light source has a first color and the second light source has a second color different from the first color.

Assignees

• Corning Inc

Inventors

• Lesuffleur Antoine D
• Mi Xiang-Dong
• Ouyang Xu
• Sun Yawei

Classifications

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title

• B60K37/20

  Dashboard panels · CPC title

• B60K35/22

  Display screens · CPC title

• B60K35/60

  Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10) · CPC title

• B60K37/02 Primary

  Operations & Transport · mapped topic