Illuminated graphics using fluorescing materials

• US 20040120140A1
• Filed: 12/11/2003
• Published: 06/24/2004
• Est. Priority Date: 03/27/2002
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Sylvesper, Gail M., Uglum, Paul A., Fye, Michael E., Lippmann, Raymond
• Application Number:
  US10/732,987
• Publication Number:
  US 20040120140A1
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: B60K 2360/188 Displaying information using colour changes
• CPC Class Codes: B60K 2360/336 Light guides
• CPC Class Codes: B60K 35/29 Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions
• CPC Class Codes: B60Q 3/14 lighting through the surface to be illuminated
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia
• CPC Class Codes: G09F 13/20 with luminescent surfaces or parts luminescent compositions C09K11/00; light sources using luminescence F21K2/00

Abstract

A backlit display is disclosed. The backlit display comprises at least one light source, a backlit component, and a light-passing substrate. The light-passing substrate includes at least one fluorescing material. The light-passing substrate is intermediately located between the light source and the backlit component such that the backlit component passes light through at least one selected portion of said substrate. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Claims

1. A backlit display, comprising:

at least one light source;

a backlit component;

a light-transmitting substrate having at least one fluorescing material incorporated into said substrate, wherein the light-transmitting substrate is intermediately located between the light source and the backlit component such that the backlit component passes light through at least one selected portion of said substrate.

2. A backlit display according to claim 1, further comprising a diffusing material incorporated into said substrate for diffusing light passing through said substrate.

3. A backlit display according to claim 2, wherein said diffusing substance at least one selected from the group consisting of a silica-based material, a PTFE material, an inorganic filler, and an acrylic-based material.

4. A backlit display according to claim 1, further comprising a light-passing coating layer disposed between said substrate and said opaque layer.

5. A backlit display according to claim 1, wherein the light-passing coating layer is colored to reflect a daytime graphics color.

6. A backlit display according to claim 1, wherein said substrate is formed from a polymer.

7. A backlit display according to claim 1, wherein said fluorescing material is chosen based on a light spectrum of a light source and a desired light spectrum for said graphic.

8. A backlit display according to claim 1, wherein said light source is an light emitting diode (LED).

9. A backlit display according to claim 8, wherein said light source is a blue LED.

10. A backlit display according to claim 1, wherein the backlit component is a button and the passing of light through at least one selected portion of said substrate is facilitated by a graphics area formed about a surface of the button.

11. A backlit display according to claim 10, wherein the backlit display further comprises a lightpipe intermediately positioned in the button that is located between the substrate and the light source.

12. A backlit display according to claim 11, wherein the button is positioned over a discrete silicon rubber switch dome and a circuit board.

13. A backlit display according to claim 10, wherein the button includes a cavity defined by side walls that reflects light toward the selected portion of the substrate.

14. A backlit display according to claim 13, wherein the side walls include a reflective, opaque material.

15. A backlit display according to claim 1, wherein the backlit component is a trim plate positioned over a circuit board and the passing of light through at least one selected portion of said substrate is facilitated by a graphics area formed about a surface of the trim plate.

16. A backlit display according to claim 15, wherein the passing of light through at least one selected portion of said substrate is further facilitated by a rotary knob positioned about the trim plate, wherein the knob includes an integral lightpipe having a visible light-transmitting surface.

17. A backlit display according to claim 15, wherein the substrate is spaced from the circuit board by a distance such that the substrate is positioned about a common plane extending from a base potion of the knob.

18. A backlit display according to claim 1, wherein the backlit component is a liquid crystal display and the passing of light through at least one selected portion of said substrate is facilitated by a graphics area formed about a surface of the liquid crystal display.

19. A backlit display according to claim 18, wherein the backlit component further comprises a reflective housing including a beveled area that receives the substrate.

20. A backlit display according to claim 19, wherein the housing includes a reflective, opaque material.

21. A backlit display according to claim 1, wherein the substrate includes a contour.

22. A backlit display according to claim 21, wherein the substrate includes a contour having a constant thickness.

23. A backlit display according to claim 21, wherein the substrate includes a contour having a varying thickness.

24. A backlit display according to claim 21, wherein the contour is flat.

25. A backlit display according to claim 21, wherein the contour is hemispherical.

26. A backlit display according to claim 21, wherein the contour is box-shaped.

27. A backlit display according to claim 21, wherein the contour is cylindrical.