LED lighting fixture

• US 7,766,508 B2
• Filed: 09/12/2006
• Issued: 08/03/2010
• Est. Priority Date: 09/12/2006
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Roberts, Lawrence Maurice Jr., Chen, Yuming, Medendorp, Nicholas W. Jr., Villard, Russell George
• Primary Examiner(s): Truong; Bao Q
• Application Number:
  US11/519,058
• Publication Number:
  US 20080062691A1
• Time in Patent Office: 1,421 Days
• Field of Search: 362/257, 362/249, 362/250, 362/800, 362/285, 362/287, 362/418, 362/230, 362/231, 362/252, 362/249.01, 362/249.02
• US Class Current: 362/249.02
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21S 8/08 with a standard F21S6/00 takes precedence
• CPC Class Codes: F21V 14/02 by movement of light sources in vehicle head lamps F21S41/657
• CPC Class Codes: F21V 19/02 with provision for adjustment, e.g. for focusing
• 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 light emitting diode (LED) lighting fixture for achieving a desired illumination pattern includes a panel and one or more LEDs attached to a surface of the panel. One or more of the LEDs may be mounted at an angle to the surface.

Claims

1. A LED lighting fixture, comprising:

a panel, and

two or more LEDs attached to a planar surface of the panel,

wherein the panel is configured with the planar surface angled relative to a horizontal plane in the fixture at an angle of between 0 and 90 degrees and the one or more of the LEDs are mounted at an angle to the planar surface to tailor the shape and direction of emitted light to use at least most of a light output from the LEDs to create an illumination pattern for at least one of area lighting or indoor lighting while minimizing overlap of the emitted light from the LEDs on an intended area.

2. The fixture of claim 1, wherein a plurality of the two or more LEDs are mounted at different angles to the planar surface.

3. The fixture of claim 1, wherein at least one of two or more LEDs is fitted with a secondary optic thereon that shapes the light output of the one or more LEDs in a desired shape.

4. The fixture of claim 1, wherein a plurality of the two or more LEDs are fitted with different secondary optics thereon.

5. The fixture of claim 1, wherein an angle at which a given LED is mounted to the panel is variable.

6. The fixture of claim 1, wherein the two or more LEDs are arranged as an array of LEDs on a plurality of strips, and wherein one or more of the strips is attached at an angle to the planar surface of the panel.

7. The fixture of claim 6, wherein two or more of the LED strips on a given panel are set at different angles to the planar surface.

8. The fixture of claim 6, wherein one or more LEDs on at least one of the LED strips, or one or more LED strips is fitted with a secondary optic thereon that shapes the light output of the one or more LEDs in a desired shape.

9. The fixture of claim 6, wherein two or more LEDs on the same or different LED strips or two or more LED strips are fitted with different secondary optics thereon that shape the light output of the two or more LEDs in a desired shape.

10. The fixture of claim 6, wherein an angle at which a given LED strip is mounted to the panel is variable.

25. The fixture of claim 1, wherein the illumination pattern comprises a roadway illumination pattern.

26. The fixture of claim 25, wherein the roadway illumination pattern comprises one of an IESNA-specified Type I, Type II, Type III or Type IV roadway illumination pattern.

11. A LED lighting fixture, comprising:

a panel, and

one or more LEDs attached to a planar surface of the panel,

wherein an angle at which a given LED is mounted to the panel is variable in at least two dimensions to permit adjustment of the given LED in the at least two dimensions.

27. The fixture of claim 11, wherein the illumination pattern comprises a roadway illumination pattern.

28. The fixture of claim 27, wherein the roadway illumination pattern comprises one of an IESNA-specified Type I, Type II, Type III or Type IV roadway illumination pattern.

12. A LED lighting fixture, comprising:

at least two connected panels, each panel comprising a planar surface configured to have multiple strips of LEDs attached thereon at different locations across the planar surface;

the multiple strips of LEDs attached to and extending outward from a planar surface of the panel;

wherein at least one of the panels is set at an angle to the other panel.

13. The fixture of claim 12, wherein at least one of the LED strips is attached at an angle to the planar surface of the corresponding panel on which the LED strip is attached.

15. The fixture of claim 12, wherein one or more LEDs on at least one of the LED strips is fitted with a secondary optic thereon that shapes the light output of the one or more LEDs in a desired shape.

16. The fixture of claim 12, wherein two or more LED on the same or different LED strips or two or more LED strips are fitted with different secondary optics thereon that shape the light output of the two or more LEDs in a desired shape.

17. The fixture of claim 12, wherein a given LED strip that is mounted to a given panel is angled in at least two different planes.

18. The fixture of claim 12, wherein one or more LEDs on one or more of the LED strips is fitted with a secondary optic thereon that shapes the light output of the one or more LEDs in a desired shape.

14. A LED lighting fixture, comprising:

at least two connected panels, each panel including two or more strips of LEDs attached to a planar surface of the panel;

wherein at least one of the panels is set at an angle to the other panel; and

wherein two or more of the LED strips on a given panel are set at different angles from each other, relative to the panel planar surface.

19. A light emitting diode (LED) lighting fixture, comprising:

at least one panel, and a plurality of strips of LEDs mounted on a planar surface of the at least one panel, wherein at least one LED strip is mounted at an angle to the planar surface, one or more LEDs on one or more of the LED strips are fitted with a secondary optic that shapes the light output of the one or more LEDs in a desired shape, and the at least one panel is angled from horizontal at an angle of between 0 and 90 degrees within the fixture so as to tailor the shape and direction of emitted light to create an illumination pattern for at least one of area lighting or indoor lighting.

23. The fixture of claim 19, wherein two or more LEDs on the same or different LED strips or two or more LED strips are fitted with different secondary optics thereon.

24. The fixture of claim 19, wherein an angle at which a given LED strip is mounted to the at least one panel is variable in one or two dimensions.

20. A light emitting diode (LED) lighting fixture, comprising:

a pair of panels, each panel connected to one another via a hinge and configured to be set at an angle from a horizontal plane via the hinge within the fixture;

a plurality of strips of LEDs mounted on a planar surface of each of the pair of panels, wherein at least one LED strip is mounted at an angle to the planar surfaces; and

one or more LEDs on one or more of the LED strips are fitted with a secondary optic.

21. A light emitting diode (LED) lighting fixture, comprising:

at least one panel; and

a plurality of strips of LEDs mounted on a planar surface of the at least one panel;

wherein at least one LED strip is mounted at an angle to the planar surface, one or more LEDs on one or more of the LED strips are fitted with a secondary optic, and the at least one panel is angled from horizontal within the fixture; and

wherein each LED strip includes a line of LEDs arranged in series on a metal printed circuit board which extends across the at least one panel, and wherein the metal printed circuit board is mounted on a metal bar that is affixed to the panel, and wherein two or more of the LED strips are set at different angles from each other, relative to the panel planar surface.

22. The fixture of claim 21, wherein the metal bar has one or more legs which are attached to the planar surface of the panel via at least one friction hinge, the one or more legs providing a heat dissipation function for the LED strip mounted thereon.

29. A method of making a LED lighting fixture comprising:

providing a panel; and

providing two or more LEDs for attachment to a planar surface of the panel;

determining mounting angles for the two or more LEDs on the panel to tailor the shape and direction of emitted light to create an illumination pattern;

determining an angle from horizontal within the fixture at which to set the panel to tailor the shape and direction of emitted light to create an illumination pattern;

mounting the two or more LEDs on the panel at the mounting angles; and

setting the panel in the fixture at the determined angle from horizontal within the fixture.

30. A method of claim 29, further comprising selecting and installing secondary optics on two or more LEDs to further tailor the shape and direction of emitted light to create an illumination pattern.

31. A LED lighting fixture, comprising:

at least two connected panels, each panel including two or more LEDs attached to a planar surface of the panel;

wherein at least one of the panels is set at an angle to the other panel; and

wherein two or more of the LEDs on a given panel are set at different angles from each other, relative to the panel planar surface.