ILLUMINATION DEVICES AND METHODS FOR MAKING THE SAME

• US 20100061093A1
• Filed: 03/10/2006
• Published: 03/11/2010
• Est. Priority Date: 03/12/2005
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Aeling, Ellen O., Janssen, Jeffrey R., Wollner, Mark R., Meis, Michael A., Hager, Patrick J.
• Application Number:
  US11/908,295
• Publication Number:
  US 20100061093A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21Y 2109/00 Light sources with light-generating elements disposed on transparent or translucent supports or substrates

Abstract

The present disclosure is generally directed to illumination devices, and particularly directed to illumination devices utilizing light transmissive layers and methods for making the same. An illumination device and method for making the device are disclosed. The device, in particular, includes a substrate and conductive region disposed on the substrate. One or more light sources, such as LEDs, are disposed on a surface of the substrate and electrically coupled to the electrically conductive region for supply of electric current. The device also includes one or more light transmissive layers disposed on the substrate and the at least one light source to encapsulate light sources and also to control characteristics of light delivery from the light sources as light passes through the light transmissive layers.

Claims

1. An illumination device comprising:

a substrate;

at least one conductive region disposed on the substrate;

at least one light source disposed on a surface of the substrate and electrically coupled to the at least one electrically conductive region, and

at least one light transmissive layer disposed on the substrate and the at least one light source that encapsulates the at least one light source and at least a portion of the at least one conductive region.

2. The illumination device as defined in claim 1, wherein the at least one light transmissive layer is one of transparent or translucent.

3. The illumination device as defined in claim 1, wherein the at least one light transmissive layer is a polarizing film.

4. The illumination device as defined in claim 1, wherein that at least one light transmissive layer is a light diffuser.

5. The illumination device as defined in claim 1 wherein the at least one light transmissive layer is composed of a light transmissive adhesive.

6. The illumination device as defined in claim 5 further comprising:

a second light transmissive layer affixed to a surface of the first light transmissive layer with the light transmissive adhesive.

7. The illumination device as defined in claim 6, wherein the substrate and the second light transmissive layers are one of glass or glass epoxy.

8. The illumination device as defined in claim 1, wherein the substrate is configured to be light transmissive.

9. The illumination device as defined in claim 7, wherein the light transmissive substrate is at least one of transparent, translucent, refractive, diffractive, reflective, or diffusive.

10. The illumination device as defined in claim 1 wherein the substrate is configured to be thermally conductive.

11. The illumination device as defined in claim 1, wherein the at least one conductive region comprises at least one of electrically conductive ink, paint, adhesive, indium tin oxide, and a conductive polymer.

12. The illumination device as defined in claim 1, wherein the at least one conductive region comprises a metal conductor comprised of least one of copper, silver, gold, aluminum, palladium, and titanium.

13. The illumination device as defined in claim 1 wherein the at least one conductive region is comprised of an electrical conductor that is light transmissive.

14. The illumination device as defined in claim 13, wherein the electrical conductor is one of transparent and translucent.

15. The illumination device as defined in claim 1 wherein the substrate is flexible.

16. The illumination device as defined in claim 1 wherein the illumination device contains at least two light management devices.

17. The illumination device as defined in claim 1, including at least two light transmissive layers including a first transmissive layer disposed on the substrate and the at least one light source and a second transmissive layer disposed on the first transmissive layer.

18. The illumination device as defined in claim 17, wherein at least one of the light transmissive layers is one of transparent, translucent, refractive, diffractive, diffusive, or reflective.

19. The illumination device as defined in claim 17, wherein at least one of the light transmissive layers is a brightness enhancing film (BEF).

20. The illumination device as defined in claim 17, further comprising a cover disposed on the second transmissive layer.

21. The illumination device as defined in claim 20, wherein the cover is one of transparent, translucent, refractive, diffractive, diffusive, or reflective

22. The illumination device as defined in claim 1 wherein the substrate is substantially planar in shape.

23. The illumination device as defined in claim 1, wherein the substrate is curved.

24. The illumination device of claim 1 in combination with a motor vehicle.

25. The illumination device of claim 1 in combination with a building.

26. The illumination device of claim 1 in combination with an illuminated sign.

27. A method for making an illumination device comprising:

disposing at least one electrically conductive material on a surface of a substrate;

disposing at least one light source on the surface of a substrate and electrically coupled with the at least one electrically conductive material; and

disposing at least one light transmissive layer on the electrically conductive

material and at least a portion of the surface of the substrate to encapsulate the at least one light source and at least a portion of the electrically conductive material.

28. The method as defined in claim 27, wherein the at least one light transmissive layer is one of transparent or translucent.

29. The method as defined in claim 27, wherein the at least one light transmissive layer is a polarizing film.

30. The method as defined in claim 27, wherein that at least one light transmissive layer is a light diffuser.

31. The method as defined in claim 27 wherein the at least one light transmissive layer is composed of a light transmissive adhesive syrup.

32. The method as defined in claim 31 further comprising:

applying a release liner on a surface of the light transmissive adhesive syrup;

curing the light transmissive adhesive syrup;

removing the release liner; and

disposing a second light transmissive layer on the cured light transmissive adhesive syrup.

33. The method as defined in claim 32, wherein the substrate and the second light transmissive layer are one of glass or glass epoxy.

34. The method as defined in claim 27, wherein the substrate is configured to be light transmissive.

35. The method as defined in claim 34, wherein the light transmissive substrate is at least one of transparent, translucent, refractive, diffractive, reflective or diffusive.

36. The method as defined in claim 27 wherein the substrate is configured to be thermally conductive.

37. The method as defined in claim 27, wherein the at least one conductive region comprises at least one of electrically conductive ink, paint, adhesive, indium tin oxide, and a conductive polymer.

38. The method as defined in claim 27, wherein the at least one conductive region comprises a metal conductor comprised of least one of copper, silver, gold, aluminum, palladium, and titanium.

39. The method as defined in claim 27 wherein the at least one conductive region is comprised of an electrical conductor that is light transmissive.

40. The method as defined in claim 39, wherein the electrical conductor is one of transparent and translucent.

41. The method as defined in claim 27 wherein the substrate is flexible.

42. The method as defined in claim 27 wherein the illumination device contains at least two light management devices.

43. The method as defined in claim 27, including at least two light transmissive layers including disposing a first transmissive layer on the substrate and the at least one light source and a disposing a second transmissive layer on the first transmissive layer.

44. The method as defined in claim 43, wherein at least one of the light transmissive layers is one of transparent, translucent, refractive, diffractive, diffusive, or reflective.

45. The method as defined in claim 44, wherein at least one of the light transmissive layers is a brightness enhancing film (BEF).

46. The method as defined in claim 43, further comprising disposing a cover on the second transmissive layer.

47. The method as defined in claim 46, wherein the cover is one of transparent, translucent, refractive, diffractive, diffusive, or reflective

48. The method as defined in claim 27 wherein the substrate is substantially planar in shape.

49. The method as defined in claim 27, wherein the substrate is curved.

50. The method as defined in claim 27, wherein disposing at least one electrically conductive material on the surface of a substrate includes a process selected from the group consisting of printing, spraying, blade coating, roll coating, vapor coating, plasma coating, electro-plating, and electroless plating.

51. The method as defined in claim 27, wherein disposing at least one electrically conductive material on the surface of a substrate includes forming a predefined pattern of conductive material using a process selected from the group consisting of screen printing, shadow masking, photolithography, etching, ablating, and laser induced thermal imaging.