Deadfront configured for color matching

Patent metadata

Field	Value
Publication number	US-12235477-B2
Application number	US-201917259745-A
Country	US
Kind code	B2
Filing date	Jul 3, 2019
Priority date	Jul 12, 2018
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

Embodiments of a deadfront configured to hide a display when the display is not active are provided. The deadfront includes a substrate having a first major surface and a second major surface. The second major surface is opposite the first major surface. The deadfront also includes a neutral density filter disposed on the second major surface of the transparent substrate and an ink layer disposed on the neutral density filter. The deadfront defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light. A contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active.

First claim

What is claimed is:

1. A deadfront configured to hide a display when the display is not active, the deadfront comprising:
a substrate having a first major surface and a second major surface, the second major surface being opposite the first major surface;
a neutral density filter disposed on the second major surface of the substrate; and
an ink layer disposed on the neutral density filter;
wherein the ink layer defines at least one display region in which the deadfront transmits at least 60% of incident light and at least one non-display region in which the deadfront transmits at most 5% of incident light;
wherein the ink layer reflects light incident on an interface between the ink layer and the neutral density filter through the first major surface such that a contrast sensitivity between each of the at least one display region and each of the at least one non-display region is at least 15 when the display is not active,
wherein the contrast sensitivity is calculated according to following formula:
CS≈R N +R I /|R D −R I |

where R N is a reflectance off the first major surface of the substrate, R I is a reflectance of the ink layer back through the first major surface, and R D is an internal reflectance of the display when the display is underlying the at least one display region,
wherein R I is between 0.1% to 5%.

2. The deadfront article of claim 1 , wherein the substrate transmits at least 70% of incident light in the visible spectrum.

3. The deadfront article of claim 1 , wherein the substrate is a plastic that is at least one of polymethylmethacrylate, polyethylene terephthalate, cellulose triacetate or polycarbonate.

4. The deadfront article of claim 1 , wherein the substrate is a glass or glass-ceramic material.

5. The deadfront article of claim 1 , wherein the substrate comprises at least one of soda lime glass, aluminosilicate glass, borosilicate glass, boroaluminosilicate glass, alkali-containing aluminosilicate glass, alkali-containing borosilicate glass, or alkali-containing boroaluminosilicate glass.

6. The deadfront article of claim 1 , wherein the neutral density filter transmits up to 80% of light in the visible spectrum.

7. The deadfront article of claim 1 , wherein the neutral density filter transmits at least 60% of light in the visible spectrum.

8. The deadfront article of claim 1 , wherein the neutral density filter comprises a film.

9. The deadfront article of claim 8 , wherein the film comprises one or more polyester layers and at least one layer comprising at least one of a dye, a pigment, a metallized layer, ceramic particles, carbon particles, or nanoparticles.

10. The deadfront article of claim 1 , wherein the neutral density filter comprises an ink coating.

11. The deadfront article of claim 10 , wherein the ink coating is a CYMK neutral black.

12. The deadfront article of claim 10 , wherein the ink coating has an L* of from 50 to 90 according to the CIE L*a*b* color space.

13. The deadfront article of claim 1 , wherein neutral density filter is a solid color.

14. The deadfront article of claim 1 , wherein the ink layer has an ink reflection coefficient of from 0.1% to 5%.

15. The deadfront article of claim 1 , further comprising a surface treatment disposed on the first major surface of the substrate.

16. The deadfront article of claim 15 , wherein the surface treatment is at least one of antiglare, etching, antireflection coating, or durable antireflection coating.

17. The deadfront article of claim 1 , wherein the substrate is 1 mm or less in thickness.

18. A device, comprising:
a deadfront having a first side and a second side, the second side being opposite the first side, the deadfront comprising:
a substrate having a first major surface and a second major surface, the first surface corresponding to the first side of the deadfront and the second major surface being opposite the first major surface;
a neutral density filter disposed on at least a portion of the second major surface of the substrate; and
an ink layer disposed on at least a portion of the neutral density filter; and

a light source disposed on the second side of the deadfront;
wherein light having a first intensity is emitted from the light source onto the second side of the deadfront and light transmitted through a display region of the deadfront has a second intensity, the second intensity being within 30% of the first intensity,
wherein the ink layer comprises a reflection coefficient from 1% to 4% at an interface between the neutral density filter and the ink layer such that the ink layer reflects light incident on the interface through the first major surface.

19. A vehicle, comprising:
an interior surface;
a display disposed on the interior surface, the display having an internal reflectance of less than 5%;
a deadfront having a first side and a second side, the second side being opposite the first side and disposed on the display, the deadfront comprising:
a substrate having a first major surface and a second major surface, the first surface corresponding to the first side of the deadfront and the second major surface being opposite the first major surface;
a neutral density filter disposed on the second major surface of the substrate; and
an ink layer disposed on the neutral density filter, wherein the ink layer comprises an ink having a reflection coefficient of greater than or equal to 1% and less than or equal to 4% at an interface between the neutral density filter and the ink layer such that the ink layer reflects light incident on the interface through the first major surface; and

wherein the ink layer defines a non-display region through which light from the display is not transmitted and absence of the ink layer defines a display region through which at light from the display is transmitted.

Assignees

• Corning Inc

Inventors

• Lesuffleur Antoine Daniel
• Ouyang Xu
• Sun Yawei

Classifications

• B60K35/10

  Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor · 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

• B60K37/00

  Dashboards (as road-vehicle superstructure sub-units B62D25/14) · CPC title

• B60K35/425

  Anti-reflection arrangements · CPC title

• B60K35/22

  Display screens · CPC title