LUMINAIRE WITH LEDS

• US 20100110673A1
• Filed: 10/12/2007
• Published: 05/06/2010
• Est. Priority Date: 10/16/2006
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Vissenberg, Michel Cornelis Josephus Marie, Dekker, Tim, Bergman, Anthonie Hendrik
• Application Number:
  US12/445,342
• Publication Number:
  US 20100110673A1
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21S 8/06 by suspension
• 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 2103/20 of polygonal shape, e.g. square or rectangular
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0045 by shaping at least a portion of the light guide

Abstract

A luminaire comprises a light guiding layer (2) and a plurality of LEDs (7), which LEDs (7) are accommodated in at least one hole (10) arranged in the light guiding layer (2), for emitting light into the light guiding layer (2). The light guiding layer (2) further comprises at least one out-coupling structure (5; 6), for coupling the light out of the light guiding layer (2).

Claims

1. A luminaire comprising

a light guiding layer (2), and

a plurality of LEDs (7), which LEDs (7) are accommodated in at least one hole (10) arranged in the light guiding layer (2), for emitting light into the light guiding layer (2), wherein

the light guiding layer (2) comprises at least one out-coupling structure (5;

6), for coupling the light out of the light guiding layer (2).

2. A luminaire according to claim 1, wherein a first out-coupling structure (5) is arranged at an outer edge of the light guiding layer (2).

3. A luminaire according to claim 1, wherein the light guiding layer (2) comprises an inner edge that forms a through hole (15) at the centre of the light guiding layer (2).

4. A luminaire according to claim 3, wherein a second out-coupling structure (6) is arranged at the inner edge that forms said hole (15) at the centre of the light guiding layer (2).

5. A luminaire according to claim 1, further comprising a heat-sink (13), for dissipating heat from the LEDs (7).

6. A luminaire according to claim 5, wherein the heat-sink (13) is arranged at a distance from an inner and/or an outer edge of the light guiding layer (2).

7. A luminaire according to claim 1, wherein the LEDs (7) are accommodated in a plurality of holes (10) arranged in the light guiding layer (2).

8. A luminaire according to claim 7, wherein each of the LED accommodating holes (10) comprises at least two side-facets (11) and at least one corner (12), the two side-facets (11) converging to form the corner (12).

9. A luminaire according to claim 7, wherein a corner (12) of a hole (10) accommodating a LED points towards an adjacent LED-accommodating hole.

10. A luminaire according to claim 7, wherein the lateral cross section shape of each of the LED-accommodating holes in the light guiding layer is square.

11. A luminaire according to claim 1, wherein the LEDs are side emitting LEDs.

12. A luminaire according to claim 1, wherein the plurality of LEDs (7) are arranged in a circular LED array (4).

13. A luminaire according to claim 1, wherein the light guiding layer (2) is substantially circular.

14. A luminaire according to claim 1, wherein the plurality of LEDs are arranged in a linear LED array (28), the light guiding layer being rectangular-shaped and the linear LED array being arranged oblique with respect to the rectangular-shaped light guiding layer.

15. A luminaire according to claim 1, wherein the light guiding layer has the shape of a right triangle, the two cathetuses of the triangular light guiding layer each having a reflective edge, respectively, and the hypotenuse of the triangular light guiding layer comprising an out-coupling structure (48) for coupling light out of the light guiding layer.

16. A luminaire according to claim 1, further comprising

a second light guiding layer (2′

), and

a second plurality of LEDs (7′

) which are accommodated in at least one hole (10′

) arranged in the second light guiding layer (2′

), for emitting light into the second light guiding layer (2′

),

the second light guiding layer (2′

) comprising at least one out-coupling structure (5′

;

6′

), for coupling the light out of the second light guiding layer (2′

), wherein the second light guiding layer (2′

) is arranged parallel with the first light guiding layer (2).

17. A luminaire according to claim 16, wherein the at least one out-coupling structure (5;

6) of the first light guiding layer (2) is configured to couple out light in a first direction, the at least one out-coupling structure (5′

;

6′

) of the second light guiding layer (2′

) being configured to couple out light in a second direction that is opposite the first direction.

18. A luminaire according to claim 16, wherein the LEDs (7) in the first light guiding layer (2) are configured to emit light having a first color spectrum, the LEDs (7′

) in the second light guiding layer (2′

) being configured to emit light having a second color spectrum that is different from the first color spectrum.

19. A luminaire according to claim 16, wherein the first light guiding layer (2) comprises a first heat-sink (13), for dissipating heat from the LEDs (7) of the first light guiding layer (2), the second light guiding layer (2′

) comprising a second heat-sink (13′

), for dissipating heat from the LEDs (7′

) of the second light guiding layer (2′

), the second heat sink (13′

) being arranged opposite the first heat sink (13) in a vertical direction.