Light emitting diode (L.E.D.) lighting fixtures with emergency back-up and scotopic enhancement

• US 7,234,844 B2
• Filed: 12/10/2003
• Issued: 06/26/2007
• Est. Priority Date: 12/11/2002
• Status: Expired due to Fees

• Current Assignee: Charles Bolta
• Original Assignee: Charles Bolta
• Inventors: Bolta, Charles, Watts, Phillip C.
• Primary Examiner(s): Sember; Thomas M.
• Application Number:
  US10/732,105
• Publication Number:
  US 20040120152A1
• Time in Patent Office: 1,294 Days
• Field of Search: 362/294, 362/373, 362/800, 362/235, 362/252, 362/249
• US Class Current: 362/294
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 9/022 Emergency lighting devices
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• 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 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 5/002 using microoptical elements for redirecting or diffusing light
• CPC Class Codes: F21V 5/02 of prismatic shape F21V5/04 takes precedence
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/32 Pulse-control circuits
• CPC Class Codes: H05B 45/3574 Emulating the electrical or functional characteristics of incandescent lamps
• CPC Class Codes: H05B 45/3578 Emulating the electrical or functional characteristics of discharge lamps

Abstract

An L.E.D. lighting fixture is provided. The lighting fixture comprises at least one heat transfer mounting bar, at least one emitter plate secured to the mounting bar, and an array of L.E.D. lights secured to each emitter plate. A method for providing light is also provided.

Claims

1. A lighting fixture, the lighting fixture comprising:

at least one heat transfer mounting bar;

at least one emitter plate secured to the mounting bar;

an array of L.E.D. lights secured to each emitter plate;

a plurality of mounting bars, the mounting bars creating air channels between each adjacent mounting bar;

a fixture body, the mounting bars and L.E.D. arrays mountable within the fixture body;

a lens cover mounted to the fixture body over the mounting bars and L.E.D. arrays; and

at least one fan mounted in the fixture body for forcing air through the air channels.

2. The lighting fixture of claim 1 wherein the beat transfer mounting bar is angled.

3. The lighting fixture of claim 1 wherein at least one of the emitter plates is angled.

4. The lighting fixture of claim 3 wherein the angle of each angled emitter plate is selected from the group consisting of side emitting and forward emitting with or without directional lens.

5. The lighting fixture of claim 1, and further comprising:

multiple angled emitter plates secured to the mounting bar.

6. The lighting fixture of claim 1 wherein the thickness of the air channels are determined by the generated heat.

7. The lighting fixture of claim 1, and further comprising:

a first fan for introducing air into the fixture body; and

a second fan for exhausting air from the fixture body.

8. The lighting fixture of claim 1 wherein the air channels are staggered inhibiting exhaust air from entering the inlet of adjacent fixtures.

9. The lighting fixture of claim 1 wherein the lens cover is a prismatic lens cover for diffusing the light evenly in all directions.

10. The lighting fixture of claim 1 wherein the lens cover is a diffusion lens mounted over the L.E.D. array.

11. The lighting fixture of claim 10 wherein the diffusion lens is configured in a substantially arch configuration.

12. The lighting fixture of claim 1 wherein the preferred L.E.D. provides light in the 400–

620 nm range.

13. The lighting fixture of claim 1 wherein the Color Rendering Index (CRI) for photopic vision is between approximately fifty (50) and approximately ninety-five (95).

14. The lighting fixture of claim 13 wherein the Color Rendering Index (CRI) is approximately 85 or greater.

15. The lighting fixture of claim 1 wherein the Kelvin correlated color temperature in the photopic/scotopic spectrum can range between approximately 3,000°

K. and 10,000°

K.

16. The lighting fixture of claim 15 wherein the correlated color temperature is approximately 7,500°

K. super daylight range with a 2.50 scotopic to photopic ratio.

17. A method for providing light, the method comprising:

providing at least one heat transfer mounting bar;

securing at least one emitter plate to the mounting bar;

securing an array of L.E.D. lights to each emitter plate;

creating air channels between each adjacent mounting bar;

providing a fixture body;

positioning the mounting bars and L.E.D. arrays within the fixture body;

mounting a lens cover to the fixture body over the mounting bars and L.E.D. arrays; and

mounting at least one fan in the fixture body for forcing air through the air channels.

18. The method of claim 17, and further comprising:

angling the heat transfer mounting bar.

19. The method of claim 17, and further comprising:

angling at least one of the emitter plates.

20. The method of claim 19 wherein the angle of each angled emitter plate is selected from the group consisting of side emitting and forward emitting with or without directional lens.

21. The method of claim 17, and further comprising:

securing multiple angled emitter plates to the mounting bar.

22. The method of claim 17, and further comprising:

determining the thickness of the air channels by the generated heat.

23. The method of claim 17, and further comprising:

introducing air into the fixture body; and

exhausting air from the fixture body.

24. The method of claim 17, and further comprising:

staggering the air channels; and

inhibiting exhaust air from entering the inlet of adjacent fixtures.

25. The method of claim 17, and further comprising:

diffusing the light evenly in all directions.

26. The method of claim 17 wherein the lens cover is a diffusion lens over the L.E.D. array.

27. The method of claim 26, and further comprising:

configuring the diffusion lens in a substantially arch configuration.

28. The method of claim 26, and further comprising:

blending the multiple light sources into one congruent light source, reducing shadows.

29. The method of claim 17, and further comprising:

providing light in the 400–

620 nm range.

30. The method of claim 17, and further comprising:

providing the Color Rendering Index (CRI) for photopic vision between approximately fifty (50) and approximately ninety-five (95).

31. The method of claim 30 wherein the Color Rendering Index (CRI) is approximately 85 or greater.

32. The method of claim 17, and further comprising:

providing the Kelvin correlated color temperature in the photopic/scotopic spectrum range between approximately 3,000°

K. and 10,000°

K.

33. The method of claim 32 wherein the correlated color temperature is approximately 7,500°

K. super daylight range with a 2.50 scotopic to photopic ratio.