ORIENTABLE LENS FOR AN LED FIXTURE

• US 20090310356A1
• Filed: 12/03/2008
• Published: 12/17/2009
• Est. Priority Date: 06/13/2008
• Status: Active Grant

• Current Assignee: Royal Philips Electronics NV (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Laporte, Jean-Francois
• Granted Patent: US 8,002,435 B2
• Time in Patent Office: Days
• US Class Current: 362/239
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• 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 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• 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 a LED fixture, comprising:

a mounting surface;

a plurality of individual LEDs attached to said mounting surface;

a plurality of orientable lenses each having a base;

a positioning sheet in contact with said base of each said orientable lens that provides force on said base of each said orientable lens in a direction towards said mounting surface, thereby compressing a portion of said orientable lens between said mounting surface and said positioning sheet;

wherein said base of each said orientable lens is adjacent to said mounting surface about a single LED of said plurality of LEDs.

2. The optical system for a LED fixture of claim 1, wherein each said orientable lens has a primary reflector at least partially surrounding a refracting lens.

3. The optical system for a LED fixture of claim 2, wherein said refracting lens and said primary reflector of each said orientable lens collimate light emitted from said single LED to a reflective surface supported by said base of each said orientable lens and angled to reflect a majority of said light off a LED light output axis of said single LED.

4. The optical system for a LED fixture of claim 1, wherein said positioning sheet has a plurality of lens apertures, each said lens aperture surrounding a portion of one said orientable lens.

5. The optical system for a LED fixture of claim 4, wherein each said lens aperture has an alignment notch and each said orientable lens has at least one alignment protrusion extending from said base and received in said alignment notch.

6. The optical system for a LED fixture of claim 1, further comprising a heatsink thermally coupled to said mounting surface.

7. The optical system for a LED fixture of claim 3, wherein said positioning sheet has a plurality of lens apertures, each said lens aperture surrounding a portion of one said orientable lens and wherein each said lens aperture has an alignment notch and each said orientable lens has at least one alignment protrusion extending from said base and received in said alignment notch.

8. An optical system for a LED luminaire, comprising:

a mounting surface;

a plurality of individual LEDS attached to said mounting surface;

a plurality of orientable lenses each having a base;

wherein said base of each said orientable lens is adjacent to said mounting surface about a single LED of said plurality of LEDs;

a positioning sheet in contact with said base of each said orientable lens, said positioning sheet having a plurality of lens apertures, each said lens aperture surrounding a portion of one said orientable lens;

whereby said positioning sheet provides force on said base of each said orientable lens in a direction towards said mounting surface, thereby compressing said orientable lens against said mounting surface.

9. The optical system for a LED luminaire of claim 8, wherein each said orientable lens has a primary reflector at least partially surrounding a refracting lens.

10. The optical system for a LED luminaire of claim 9, wherein said refracting lens and said primary reflector of each said orientable lens collimate light emitted from said single LED to a reflective surface supported by said base of each said orientable lens and angled to reflect a majority of said light off a LED light output axis of said single LED.

11. The optical system for a LED luminaire of claim 8, further comprising a heatsink thermally coupled to said mounting surface.

12. The optical system for a LED luminaire of claim 8, wherein each said lens aperture has an alignment notch and each said orientable lens has an alignment protrusion extending from said base and received in said alignment notch.

13. The optical system for a LED luminaire of claim 12, wherein each said orientable lens has a primary reflector at least partially surrounding a refracting lens.

14. The optical system for a LED luminaire of claim 13, wherein said refracting lens and said primary reflector of each said orientable lens collimate light emitted from said single LED to a reflective surface supported by said base of each said orientable lens and angled to reflect a majority of said light off a LED light output axis of said single LED.

15. An optical system for a LED luminaire, comprising:

a mounting surface supporting a plurality of LEDs, said mounting surface also supporting electrical connections from said plurality of LEDs to a power supply;

a positioning sheet mountable adjacent to said mounting surface and having a plurality of apertures such that when said positioning sheet is mounted adjacent said mounting surface, said plurality of apertures are aligned with said plurality of LEDs of said mounting surface;

a plurality of lenses having a base positioned between said positioning sheet and said mounting surface, each of said lenses extending through one of said plurality of apertures of said positioning sheet;

wherein said lenses are individually rotatable within each of said apertures to redirect light emitted from an LED positioned directly below said lens to a predefined location, each of said lenses having an alignment structure allowing said lens to be locked into one of a plurality of rotatable positions about said LED positioned directly below said lens.

16. The optical system for a LED luminaire of claim 15, wherein each said lens has a primary reflector at least partially surrounding a refracting lens

17. The optical system for a LED luminaire of claim 16, wherein said refracting lens and said primary reflector of each said orientable lens collimate light emitted from said single LED to a reflective surface supported by said base of each said orientable lens and angled to reflect a majority of said light off a LED light output axis of said single LED.

18. The optical system for a LED luminaire of claim 15, wherein said alignment structure includes at least one alignment protrusion.

19. The optical system for a LED luminaire of claim 18, wherein said alignment protrusion extends from said base of each said orientable lens.

20. The optical system for a LED luminaire of claim 15, wherein a rim portion extends from said base of each said orientable lens, each said rim portion abutting a corresponding said lens aperture of said positioning sheet.