Enhanced diffusive lighting and pattern effects over automotive surface panels

Patent metadata

Field	Value
Publication number	US-12338965-B2
Application number	US-202318315282-A
Country	US
Kind code	B2
Filing date	May 10, 2023
Priority date	Sep 12, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

The present invention pertains to automotive surface panel illumination with the objective of attaining the whitest diffusive appearance with maximized light intensity transmission features. An automotive luminous panel system includes a luminous unit arrangement as defined by an anti-mist diffusive coating applied to a light transmissive substrate with a corresponding masked cover lens patterned with bleed-gaps that are configured to convey incident light directly through the patterned optical arrangement and operate between the hidden until lit modes of the luminous unit.

First claim

The invention claimed is:

1. A luminous panel with light diffusive properties associated with an automotive lighting or signaling system comprising:
a polymeric panel of a light-transmissive medium;
a sealcoat layer on the polymeric panel;
a mask coat on the sealcoat layer, with the mask coat including a pattern formed with a number of bleed-gaps created from a laser ablation process; and
an anti-mist diffusive coating on the polymeric panel, where the anti-mist diffusive coating is configured to apply an anti-mist function and a light-flattening function through the polymeric panel;
where the anti-mist diffusive coating includes a silica-based matting agent or matte particles in concentrations of between 5-9% per volume of the anti-mist diffusive coating.

2. The luminous panel of claim 1 , wherein the polymeric panel includes polycarbonate (PC) or polymethyl methacrylate (PMMA).

3. The luminous panel of claim 1 , wherein the mask coat is a thickness of about 12 to 15 microns.

4. The luminous panel of claim 1 , where a bleed area is defined by a number of bleed gaps that are configured to form a number of patterns by an ablation process.

5. The luminous panel of claim 1 , wherein the anti-mist diffusive coating measures at a thickness of about 8 to 15 microns.

6. The luminous panel of claim 1 , wherein the sealcoat layer covers the mask coat and the number of bleed-gaps along the polymeric panel.

7. The luminous panel of claim 1 , wherein the sealcoat layer covers the polymeric panel under the mask coat and the number of bleed-gaps.

8. The luminous panel of claim 1 , wherein the sealcoat layer is a polyurethane based material.

9. The luminous panel of claim 1 , wherein the luminous panel is configured to produce uniform light without discernable hot-spots to the eyes of an observer along the pattern when activated by a light source.

10. The luminous panel of claim 1 , wherein the pattern includes a ghost effect feature, with the ghost effect feature configured to generate bleed-area features to an observer when an associated luminous unit is turned-on to show a visible impression and to show a different impression when the associated luminous unit is turned-off.

11. The luminous panel of claim 1 , where emitted light through the luminous panel is configured to undergo a light-flattening process after propagating incident light through an anti-mist diffusive coating.

12. The luminous panel of claim 1 , further including a composition that is configured to diffuse penetrating light and eliminate hot-spots.

13. The luminous panel of claim 1 , where a lenticular body is represented as part of said automotive system.

14. The luminous panel of claim 1 , where vibrant white diffusive lighting is configured to result in a light output value that is homogenous to within a 10% variation along a perimeter span of the luminous panel as measured by a known process.

15. The luminous panel of claim 1 , where vibrant white diffusive lighting is configured to result to an observer when light activation is applied to the luminous panel from a “ghost effect” condition.

16. A motor vehicle using a luminous panel that comprises:
a polymeric substrate that is light-transmissive;
a hybrid coating on the polymeric substrate that applies an anti-mist function and a light flattening function within an integrated layer that is configured to provide a pre-defined value of luminescent intensity and a pre-defined value of light diffusion to an observer;
where the hybrid coating includes a silica-based matting agent or matte particles in concentrations of between 5-9% per volume of the hybrid coating;
a mask coat of a light-blocking composition applied on the polymeric substrate, on an exterior side opposing an interior side;
a number of bleed-gaps, formed by laser ablation, within the mask coat, the number of bleed-gaps configured to receive a number of beams of diffusive light through the hybrid coating.

17. The motor vehicle of claim 16 , wherein the hybrid coating on the polymeric substrate measures at a thickness of about 0.008 mm-0.015 mm.

18. The motor vehicle of claim 16 , where a composition of a mask coat is a thickness of about 0.012 mm-0.015 mm.

19. A method of making a luminous panel of an automobile comprising:
providing a polymeric panel of a light-light-transmissive substrate;
applying a sealcoat layer on the polymeric panel;
applying a light-diffusive coating on the polymeric panel, the light-diffusive coating including a silica-based matting agent or matte particles in concentrations of between 5-9% per volume of the light-diffusive coating;
overlaying a mask coat on the sealcoat layer; and
applying a laser ablation process on the mask coat to form a number of bleed-gaps in a pattern.

Assignees

• Valeo North America Inc
• Valeo Vision

Inventors

• Fraizer Robert

Classifications

• G02B5/0242

  by means of dispersed particles · CPC title

• F21S43/50

  characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers · CPC title

• B05D7/52

  Two layers · CPC title

• B05D3/06

  by exposure to radiation (B05D3/02 takes precedence {; plasma treatment B05D3/141}) · CPC title

• F21S43/281

  Materials thereof; Structures thereof; Properties thereof; Coatings thereof · CPC title