Lens frame with a LED support surface and heat dissipating structure

• US 8,506,127 B2
• Filed: 12/11/2009
• Issued: 08/13/2013
• Est. Priority Date: 12/11/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Russello, Thomas, Akinrele, Dylan, Baboolal, Kevin Anthony, Schaefer, Gary Eugene, Mihalcea, Hristea, Wallace, Dana, Campbell, Wayne D., Stanford, Clint
• Primary Examiner(s): Roy, Sikha
• Application Number:
  US12/636,243
• Publication Number:
  US 20110141728A1
• Time in Patent Office: 1,341 Days
• Field of Search: 362/235, 362/294, 362/373
• US Class Current: 362/294
• CPC Class Codes: F21V 17/10 characterised by specific fastening means or way of fastening F21V17/02 - F21V17/08 take precedence
• CPC Class Codes: F21V 19/04 with provision for changing light source, e.g. turret auxiliary devices for cleaning, placing, or removing incandescent lamps H01K3/32, fluorescent lamps H01J9/006
• CPC Class Codes: F21V 29/504 of refractors
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• 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]

Abstract

A lens frame for mounting and cooling LEDs is described. The lens frame (120) may be continuous and attachable to a luminaire (100) having a luminaire housing (110) with an opening (112). The lens frame (120) may extend across and close the opening (112) of the luminaire housing (110). The lens frame (120) may include a recessed support surface (122), a lens attachment area (126) positioned outward from and peripherally of the support surface (122), and heat dissipating structure (130) located peripherally of the support surface (122). A plurality of LEDs (154) may be coupled to the support surface (122) of the lens frame (120) exteriorly of the luminaire housing (110) and a lens (188) may be coupled to the lens retaining area (126) of the lens frame (120).

Claims

1. A retrofit heat dissipating lens frame for attachment to a luminaire housing having a luminaire housing opening, the lens frame comprising:

a continuous support surface (122) supporting an LED board (152) having a plurality of LEDs (154) coupled thereto, said continuous support surface generally facing an illumination direction;

a lens attachment flange (127) integrally formed with a heat dissipating structure (130) and offset away from said support surface (122) generally in said illumination direction;

a lens, attached to said lens attachment flange;

wherein said lens (188), and said support surface (122) form a substantially sealed chamber for said plurality of LEDs (154);

wherein said heat dissipating lens frame (120) is sized to completely cover said opening (112) of said luminaire housing (110) when attached to said luminaire housing (110); and

wherein said support surface (122) having a partially exposed portion to the external environment when said lens frame (120) is attached to said luminaire housing (110) wherein said support surface (122) is of a sufficient mass to dissipate heat from an LED board (152).

2. The heat dissipating lens frame of claim 1, wherein said support surface (122) includes a plurality of heat fins (144) located peripherally of said LED support surface (122).

3. The heat dissipating lens frame of claim 2, wherein said plurality of heat fins (144) are located peripherally of said luminaire housing (110) when said lens frame (120) is attached to said luminaire housing (110).

4. The heat dissipating lens frame of claim 2, wherein said plurality of heat fins (144) are vertically oriented and extend from adjacent a support surface plane generally defined by said support surface (122) to adjacent a lens attachment plane generally defined by said lens attachment flange (127).

5. The heat dissipating lens frame of claim 1, wherein said support surface (122) includes a vertically oriented sidewall (132) around the periphery of said lens (188).

6. The heat dissipating lens frame of claim 5, wherein said support surface (122) includes at least one trough between said sidewall (132) and the periphery of said heat dissipating lens frame.

7. The heat dissipating lens frame of claim 6, wherein said at least one trough is generally upward facing and is not directly exposed to the external environment when said lens frame (120) is attached to said luminaire housing (110).

8. The heat dissipating lens frame of claim 6, wherein said at least one trough is generally facing in said illumination direction and is directly exposed to the external environment when said lens frame (120) is attached to said luminaire housing (110).

9. A luminaire with a lens frame for mounting and cooling LEDs, the luminaire comprising:

a luminaire housing (110) having an opening (112);

a continuous lens frame (120) extending across and closing said opening (112) of said luminaire housing (110);

said lens frame (120) comprising a recessed support surface (122) generally facing an illumination direction, a lens retaining area (126) positioned peripherally of said support surface (122) and outward and away from said support surface (122) and said luminaire housing (110);

a plurality of LEDs (154) coupled to said support surface (122) of said lens frame (120) exteriorly of said luminaire housing (110);

a lens (188) coupled to said lens retaining area (126);

wherein said support surface (122), and said lens (128) enclose said LEDs (154); and

an LED driver (162) located interiorly of said housing (110) remote from said lens frame (120), wherein said support surface (122) having a partially exposed portion to the external environment and said support surface (122) is of a sufficient mass to dissipate heat from an LED board (152).

10. The heat dissipating lens frame of claim 9, wherein said support surface (122) includes a plurality of vertically oriented heat fins (144) extending from adjacent a support surface plane generally defined by a side opposite said illumination direction of said support surface (122) to adjacent a lens attachment plane generally defined by said lens retaining area (126).

11. The luminaire of claim 10, wherein said heat fins (144) extend peripherally of said luminaire housing (110).

12. The luminaire of claim 10, wherein said heat fins (144) are flanked by sidewalls of a heat dissipating structure.

13. The heat dissipating lens frame of claim 12, wherein said sidewalls include at least a portion of a vertically oriented sidewall (132) extending between said LED support surface and said lens.

14. The heat dissipating lens frame of claim 9, wherein said support surface (122) includes at least one trough around the periphery of said heat dissipating lens frame (120).

15. The heat dissipating lens frame of claim 14, wherein said at least one trough is located interiorly of said luminaire (100).

16. The heat dissipating lens frame of claim 14, wherein said at least one trough is generally facing away from said luminaire housing (110) and exposed to the external environment.

17. An LED luminaire, comprising:

a housing (110) having an opening (112);

an LED driver (162) surrounded by said housing (110);

a lens frame (120) contacting said housing (110) and extending completely across said opening (112) of said housing (110), said lens frame (120) comprising a support surface (122), a lens retaining area (126) positioned outward and away from said support surface (122), wherein said lens retaining area (126), and said support surface (122), are all formed as an integral piece;

an LED board (152) coupled to said support surface (122), said LED board (152) having a plurality of LEDs (154) outputting a directed light output, said LEDs (152) electrically connected to said LED driver (162);

a lens (188) coupled to said lens retaining area (126);

wherein said lens (188), and said LED support surface (122), form a chamber enclosing said plurality of LEDs (154);

wherein said support surface (122) having a partially exposed portion to the external environment and said support surface (122) is of a sufficient mass to dissipate heat from said LED board (152) and wherein said LED driver (162) is mounted within said housing (110) non-adjacent to said lens frame (120).

18. The LED luminaire of claim 17, wherein LED luminaire includes at least one vertically oriented wall (132) extending from a periphery of said support surface (122) toward said lens retaining area (126).

19. The LED luminaire of claim 18, wherein a lens retaining ring couples said lens to said lens retaining area (126).