Orientable lens for an LED fixture

• US 7,766,509 B1
• Filed: 07/11/2008
• Issued: 08/03/2010
• Est. Priority Date: 06/13/2008
• Status: Active Grant

• Current Assignee: Royal Philips Electronics NV (Koninklijke Philips N.V.)
• Original Assignee: Lumec Inc.
• Inventors: Laporte, Jean-Francois
• Primary Examiner(s): HAN, JASON
• Application Number:
  US12/171,362
• Time in Patent Office: 753 Days
• Field of Search: 36224901-24904, 362/277, 362282-283, 362/311.02, 362322-323, 362/327, 362/800
• US Class Current: 362/249.02
• CPC Class Codes: F21V 14/06 by movement of refractors in vehicle head lamps F21S41/635
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 5/08 producing an asymmetric light distribution
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A mounting surface for mounting a plurality of LEDs has a plurality of orientable lenses each individually affixed about a single LED. Each orientable lens has a primary reflector and a refracting lens that direct light emitted from a single LED to a reflective surface of the orientable lens that reflects the light off a primary LED light output axis.

Claims

1. An optical system for an LED fixture, comprising:

a mounting surface with a plurality of attached LEDs;

a plurality of orientable lenses each having a base;

wherein said base of each said orientable lens is affixed to said mounting surface about a single LED of said plurality of LEDs in a rotational orientation relative to said single LED;

said base of each said orientable lens being attached to a primary reflector, said primary reflector at least partially surrounding a refracting lens;

wherein said refracting lens and said primary reflector of each said orientable lens direct a majority of light emitted from said single LED to an angled reflective surface supported by said base and angled to reflect a majority of said light off a LED light output axis of said single LED.

2. The optical system for an LED fixture of claim 1, wherein said refracting lens and said primary reflector of each said orientable lens are attached by a sidewall extending from the periphery of said refracting lens toward a top of said primary reflector.

3. The optical system for an LED fixture of claim 1, wherein said reflective surface of each said orientable lens is angled to reflect a majority of said light in a vertical plane within a range of 50°

to 75°

off said LED light output axis.

4. The optical system for an LED fixture of claim 3, wherein said primary reflector, said refracting lens, and said reflective surface are configured to reflect a majority of said light in a horizontal plane within a range of 40°

from said LED light output axis.

5. The optical system for an LED fixture of claim 1, wherein said reflective surface of each said orientable lens reflects said light off said primary LED light output axis to an optical lens of each said orientable lens, said optical lens attached to said reflector and extending toward said base.

6. The optical system for an LED fixture of claim 1, wherein said orientable lens is an integral molded unit.

7. The optical system for an LED fixture of claim 5, wherein said optical lens alters the direction of light passing therethrough.

8. The optical system for an LED fixture of claim 2, wherein a reflecting portion is provided attached to said sidewall of each said orientable lens adjacent said primary reflector and generally facing said refracting lens and wherein said reflecting portion of each said orientable lens directs a portion of light emitted from each said single LED and passing through said sidewall to said reflective surface.

9. The optical system for an LED fixture of claim 2, wherein said primary reflector is a parabolic reflector.

10. An optical system for an LED fixture, comprising:

a mounting surface with a plurality of LEDs attached;

a plurality of orientable lenses each having a base;

wherein said base of each said orientable lens is affixed to said mounting surface about a single LED of said plurality of LEDs in a rotational orientation relative to said single LED;

said base of each said orientable lens being attached to a primary reflector, said primary reflector at least partially surrounding a refracting lens;

wherein said refracting lens and said primary reflector direct a majority of light emitted from said single LED to a reflecting prism;

wherein said reflecting prism has an angled reflective surface and an optical lens for directing said light off a primary LED light output axis.

11. The optical system for an LED fixture of claim 10, wherein said refracting lens and said primary reflector of each said orientable lens are attached by a sidewall extending from the periphery of said refracting lens toward a top of said primary reflector.

12. The optical system for an LED fixture of claim 11, wherein a reflecting portion is provided attached to said sidewall of each said orientable lens adjacent said primary reflector and generally facing said refracting lens.

13. The optical system for an LED fixture of claim 12, wherein said reflecting portion of each said orientable lens directs a portion of light emitted from each said single LED and passing through said sidewall to said reflective surface of said reflecting prism of each said orientable lens.

14. The optical system for an LED fixture of claim 13, wherein a surface is provided substantially opposite said reflecting portion, adjacent said primary reflector, and generally facing said refracting lens.

15. The optical system for an LED fixture of claim 10, wherein said reflecting prism of each said orientable lens is positioned and configured to reflect a majority of said light in a vertical plane within a range of 50°

to 75°

off said primary LED light output axis.

16. The optical system for an LED fixture of claim 10, wherein each said orientable lens is configured and oriented to direct at least 70% of said light emitted from each said LED off said primary LED light output axis.

17. The optical system for an LED fixture of claim 10, wherein said optical lens alters the direction of light passing therethrough.

18. The optical system for an LED fixture of claim 11, wherein said primary reflector is a parabolic reflector.

19. The optical system for an LED fixture of claim 10, wherein said orientable lens is an integral molded unit.

20. The optical system for an LED fixture of claim 18, wherein said orientable lens is an integral molded unit.

21. An optical system for an LED fixture, comprising:

a plurality of LEDs attached to a mounting surface;

a plurality of orientable lenses, each said orientable lens having a base, a parabolic reflector, a refracting lens, and a reflective surface;

said base of each said orientable lens being affixed to said mounting surface about a single LED of said plurality of LEDS and supporting said parabolic reflector and said reflective surface;

said parabolic reflector of each said orientable lens at least partially surrounding a light emitting portion of said single LED and said refracting lens;

said reflective surface of each said orientable lens extending at an angle away from said base and intersecting a LED light output axis at an angle, said LED light output axis being outward and away from said mounting surface and centrally located in said light emitting portion of said single LED;

said refracting lens of each said orientable lens positioned between each said single LED and said reflective surface and intersecting said LED light output axis;

wherein said refracting lens and said parabolic reflector have a configuration and orientation wherein a majority of light rays emitted by said single LED contacts at least one of said refracting lens and said parabolic reflector and is directed towards and at least partially reflected by said reflective surface of each said orientable lens, thereby uniformly directing a majority of light rays incident upon said reflective surface within a predefined range of angles with respect to said LED light output axis.

22. The optical system for an LED fixture with an orientable lens of claim 21, wherein said orientable lens is an integral molded unit.

23. The optical system for an LED fixture of claim 22, wherein said refracting lens and said parabolic reflector of each said orientable lens are attached by a sidewall extending from the periphery of said refracting lens toward a top of said parabolic reflector.

24. The optical system for an LED fixture of claim 23, wherein a reflecting portion is provided attached to said sidewall of each said orientable lens adjacent said parabolic reflector and generally facing said refracting lens.

25. The optical system for an LED fixture of claim 24, wherein said reflecting portion of each said orientable lens directs a portion of light emitted from each said single LED and passing through said sidewall to said reflective surface of each said orientable lens.

26. The optical system for an LED fixture of claim 25, wherein a surface is provided substantially opposite said reflecting portion, adjacent said parabolic reflector, and generally facing said refracting lens.

27. The optical system for an LED fixture with an orientable lens of claim 21, wherein said majority of light rays incident upon said reflective surface of each said orientable lens are uniformly directed towards, and a substantial majority pass through, an optical lens attached to said reflective surface and extending towards said base of each said orientable lens.

28. The optical system for an LED fixture with an orientable lens of claim 27, wherein said optical lens of each said orientable lens is positioned and configured to alter said range of angles of said majority of light rays passing therethrough.

29. The optical system for an LED fixture with an orientable lens of claim 21, wherein said range of angles is from 50°

to 75°

off said LED light output axis in a vertical plane.

30. An optical system for an LED fixture having an LED board with a plurality of orientable lens mounted over individual LEDs, comprising:

a support surface having a plurality of LEDs electrically connected to a power source;

a plurality of orientable lens mountable to said surface, each orientable lens individually mounted over an individual LED, each of said orientable lens having;

a base portion retained on said surface substantially surrounding an LED;

a primary refracting lens situated over said LED;

a first and second primary reflector surrounding at least a portion of said primary refracting lens;

wherein said primary refracting lens and said first and second primary reflector redirect a majority of light output from said LED to an angled reflector, said angled reflector reflecting said light through an optical lens opposing said reflector.

31. An optical system for an LED fixture with an orientable lens, comprising:

a plurality of LEDs attached to a mounting surface;

a plurality of orientable lenses, each said orientable lens having a base, a parabolic reflector, a collimating lens, and a reflecting prism having a reflective surface and an optical lens;

said base of each said orientable lens affixed to said mounting surface about a single LED of said plurality of LEDS and supporting said parabolic reflector and said reflecting prism;

said parabolic reflector at least partially surrounding a light emitting portion of said single LED and said collimating lens;

said reflective surface extending at an angle away from said base and intersecting a LED light output axis at an angle, said LED light output axis being outward and away from said mounting surface and centrally located in said light emitting portion of said single LED;

said collimating lens positioned between said single LED and said reflective surface and intersecting said LED light output axis;

wherein said collimating lens and said parabolic reflector have a configuration and orientation wherein a majority of light rays emitted by said single LED contacts at least one of said collimating lens and said parabolic reflector and is directed towards and at least partially reflected by said reflective surface of said reflecting prism, thereby uniformly directing a majority of light rays incident upon said reflective surface away from said reflective surface, through said prism, and out said optical lens within a predefined range of angles with respect to said LED light output axis.

32. The optical system for an LED fixture with an orientable lens of claim 31, wherein said orientable lens is an integral molded unit.

33. The optical system for an LED fixture of claim 32, wherein said collimating lens and said parabolic reflector of each said orientable lens are attached by a sidewall extending from the periphery of said collimating lens toward a top of said parabolic reflector.

34. The optical system for an LED fixture with an orientable lens of claim 33, wherein said reflective surface of each said prism of each said orientable lens is configured to internally reflect a majority of said light rays incident upon said reflective surface away from said reflective surface.

35. The optical system for an LED fixture with an orientable lens of claim 34, wherein said optical lens of each said orientable lens is positioned and configured to alter said range of angles of said substantial majority of light rays passing therethrough.

36. The optical system for an LED fixture of claim 35, wherein a reflecting portion is provided attached to said sidewall of each said orientable lens adjacent said parabolic reflector and generally facing said collimating lens.

37. The optical system for an LED fixture of claim 36, wherein said reflecting portion of each said orientable lens directs a portion of light emitted from each said single LED and passing through said sidewall to reflective surface of said reflecting prism of each said orientable lens.

38. The optical system for an LED fixture of claim 37, wherein a surface is provided substantially opposite said reflecting portion, adjacent said parabolic reflector, and generally facing said collimating lens.

39. The optical system for an LED fixture of claim 38, wherein said orientable lens is formed from optical grade acrylic.

40. The optical system for an LED fixture of claim 39, wherein said mounting surface is a flat board.

41. The optical system for an LED fixture of claim 40, wherein said flat board is an aluminum flat board.

42. The optical system for an LED fixture of claim 31, wherein said mounting surface is a flat board.