Methods and apparatus for providing lighting via a grid system of a suspended ceiling

• US 8,061,865 B2
• Filed: 05/22/2006
• Issued: 11/22/2011
• Est. Priority Date: 05/23/2005
• Status: Expired due to Fees

• Current Assignee: Philips Solid-State Lighting Solutions (Koninklijke Philips N.V.)
• Original Assignee: Philips Solid-State Lighting Solutions (Koninklijke Philips N.V.)
• Inventors: Mollnow, Tomas, Piepgras, Colin, Dowling, Kevin J., Morgan, Frederick M.
• Primary Examiner(s): PAYNE, SHARON E
• Application Number:
  US11/419,660
• Publication Number:
  US 20060262521A1
• Time in Patent Office: 2,010 Days
• Field of Search: 362148-150, 362/290, 362/292, 362/373, 362/294, 362/264, 362/345, 362/404
• US Class Current: 362/149
• CPC Class Codes: E04B 9/006 with means for hanging lighting fixtures or other appliances to the framework of the ceiling
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21V 21/35 with direct electrical contact between the supporting element and electric conductors running along the guiding element
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/71 using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Methods and apparatus for providing sources of light, or mechanical and/or electrical connections for light sources, via a grid system of a suspended ceiling. All or a portion of a grid system for a suspended ceiling may be configured to support the generation of light. Lighting units may be coupled to various portions of the grid system in a removable and modular fashion, so as to be completely or substantially recessed above the ceiling surface, or as pendant components hanging below the ceiling surface. Lighting interface components of the grid system also may be configured to facilitate significant thermal dissipation from lighting units. In one exemplary implementation, one or more LED-based lighting units may be coupled to one or more lighting interface components of the grid system so as to provide controllable multi-color and/or essentially white light.

Claims

1. A lighting interface component that forms at least a portion of a grid system for a suspended ceiling, the lighting interface component comprising:

a first flange configured to support a first ceiling tile when the first ceiling tile is installed in the suspended ceiling;

a second flange configured to support a second ceiling tile when the second ceiling tile is installed in the suspended ceiling;

a central channel portion disposed between the first flange and the second flange and configured to provide a mechanical connection and an electrical connection to at least one lighting unit when the at least one lighting unit is coupled to the central channel portion, wherein the electrical connection is configured to provide an operating power and at least one control signal different from the operating power to the at least one lighting unit,

said central channel portion including first and second downwardly depending support members;

a cross member support spanning said first and second support members;

an air flow cooling channel formed interiorly of said central channel portion and above said at least one lighting unit;

wherein said central channel portion extends into a plenum above said suspended ceiling,

said air flow channel formed so as to preclude a flow of air between said plenum and an area below the suspended ceiling;

a plurality of cooling features thermally connected to said cross member and extending into said air flow cooling channel to dissipate heat generated from said at least one lighting unit said cross member support spanning said central channel portion and having;

a plurality of conductors disposed spatially and substantially in parallel along at least a portion of a length of said cross member support spanning said central channel portion and interposed between first and second rails longitudinally extending along at least a portion of said cross member support, said opposing first and second rails retaining said at least one lighting unit;

wherein said plurality of conductors provide the electrical connection at any of a plurality of locations along the length of the central channel portion, the plurality of conductors comprising;

at least one first conductor to provide the operating power to the at least one lighting unit; and

at least one second conductor to provide the at least one control signal to the at least one lighting unit.

2. The lighting interface component of claim 1, wherein said air flow channel is positioned between said cross member support and said at least one lighting unit.

3. The combination of claim 1, wherein the at least one lighting unit includes at least one LED-based lighting unit.

4. The lighting interface component of claim 1, wherein the lighting interface component is configured to form at least a portion of a main channel of the grid system.

5. The lighting interface component of claim 1, wherein the lighting interface component is configured to form at least a portion of a cross channel of the grid system.

6. The lighting interface component of claim 1, wherein the lighting interface component is formed so as to provide at least one intersection of at least one main channel and at least one cross channel of the grid system.

7. The lighting interface component of claim 1, wherein the lighting interface component is configured to form a plurality of main channels and a plurality of cross channels of the grid system.

8. The lighting interface component of claim 1, wherein flange wherein said air flow channel is positioned above said cross member support and said lighting unit.

9. The lighting interface component of claim 1, wherein said downwardly depending support members are formed integrally with said first flange and said second flange.

10. The lighting interface component of claim 1, wherein the at least one structural said downwardly depending support members is are an essentially U-shaped member.

11. The lighting interface component of claim 1, wherein a cross-section of at least one of said downwardly depending support members has a curved shape.

12. The lighting interface component of claim 1, wherein a cross-section of at least one of said downwardly depending support members has a substantially angular shape.

13. The lighting interface component of claim 1, wherein a cross-section of at least one of said downwardly depending support members has one of a rectangular shape and a trapezoidal shape.

14. The lighting interface component of claim 1, wherein said central channel portion and said downwardly depending support members are configured to form a space in which the at least one lighting unit is disposed, such that at least a portion of the at least one lighting unit, when coupled to the lighting interface component, resides above a lower surface of the suspended ceiling.

15. The lighting interface component of claim 14, wherein said central channel portion and said downwardly depending support members are configured to form the space such that the at least one lighting unit, when coupled to the lighting interface component, resides completely above the lower surface of the suspended ceiling.

16. The lighting interface component of claim 14, wherein the at least one lighting unit includes at least one light exit surface, and wherein said central channel portion and said downwardly depending support members are configured to form the space such that when the at least one lighting unit is coupled to the lighting interface component, the at least one light exit surface is essentially flush with the suspended ceiling.

17. The lighting interface component of claim 1, wherein the electrical connection includes at least one interlocking electrical connection.

18. The lighting interface component of claim 1, wherein the plurality of conductors includes a plurality of electrical contact points disposed on the at least one structural support member.

19. The lighting interface component of claim 1, wherein the cross member support rails are configured to engage with at least one resilient tab mechanically associated with the at least one lighting unit.

20. The lighting interface component of claim 1, wherein cross member support rails are configured to engage with at least one essentially rigid tab mechanically associated with the at least one lighting unit.

21. The lighting interface component of claim 1, wherein said rails a sliding engagement of the at least one lighting unit with said cross members support.

22. The lighting interface component of claim 1, wherein said air flow channel facilitates a significant flow of air in said central channel portion when the at least one lighting unit is coupled to said cross member support, so as to dissipate heat generated by the at least one lighting unit.

23. The lighting interface component of claim 1, wherein said air flow channel facilitates a significant thermal conduction when the at least one lighting unit is coupled to said cross member support, so as to dissipate heat generated by the at least one lighting unit.

24. The lighting interface component of claim 1, wherein the central channel portion includes at least one air circulation component to facilitate a flow of air in the central channel portion.

25. A lighting interface component that forms at least a portion of a grid system for a suspended ceiling, comprising:

a central channel portion which includes first and second structural support members;

said first structural support member having a first flange, said first flange configured to support a first ceiling tile;

said second structural support member having a second flange, said second flange configured to support a second ceiling tile;

a cross member positioned between said first and said second structural support members;

an air flow channel formed within said central channel portion and above at least one lighting unit;

wherein said central channel portion through said cross member provides a mechanical connection and an electrical connection to at least one lighting unit when the at least one lighting unit is coupled to the central channel portion, wherein the electrical connection is configured to provide operating power to said at least one lighting unit;

and further wherein said mechanical connection includes at least one rail mechanically supporting said at least one lighting unit within said lighting interface component;

said air flow channel configured to preclude a flow of air between a plenum above said first and second ceiling tiles and an area below said first and second ceiling tiles;

said air flow channel having air flow apertures to said area below said first and said second ceiling tiles;

cooling features in thermal connectivity with said cross member and extending into said air flow channel to dissipate heat generated from said at least one lighting unit;

a plurality of conductors forming said electrical connection and extending along at least a portion of said cross member, said plurality of conductors including at least a first conductor to provide operating power to said at least one lighting unit.

26. The lighting interface of claim 25 wherein said air flow channel is positioned below said cross member and above said lighting unit.

27. The lighting interface component of claim 25 wherein said air flow channel is positioned above said cross member and said lighting unit within said central channel portion.

28. The lighting interface component of claim 25 including one or more air circulation devices disposed within said air flow channel and coupled to at least one of said first or said second structural support member to facilitate a flow of air in said air flow channel.