Lighting system

• US 9,297,514 B2
• Filed: 04/20/2015
• Issued: 03/29/2016
• Est. Priority Date: 03/17/2011
• Status: Active Grant

• Current Assignee: Hughey & Phillips LLC (Honeywell International Inc.)
• Original Assignee: Hughey & Phillips LLC (Honeywell International Inc.)
• Inventors: Roudeski, Charles A.
• Primary Examiner(s): Lee, Diane
• Assistant Examiner(s): Sufleta, II, Gerald J
• Application Number:
  US14/690,991
• Publication Number:
  US 20150226402A1
• Time in Patent Office: 344 Days
• Field of Search: 340/961, 340/981
• US Class Current: 1/1
• CPC Class Codes: B64D 2203/00 Aircraft or airfield lights using LEDs
• CPC Class Codes: B64F 1/20 Arrangement of optical beacons
• CPC Class Codes: F21S 8/032 the surface being a floor or like ground surface, e.g. pavement
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 5/048 the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/0058 adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources
• CPC Class Codes: F21V 7/041 with conical or pyramidal surface
• CPC Class Codes: F21V 7/048 with facets structure
• CPC Class Codes: F21V 7/09 with a combination of different curvatures
• CPC Class Codes: F21W 2111/06 for aircraft runways or the like
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y02T 50/80 Energy efficient operational measures, e.g. ground operations or mission management
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A lighting system having a reflector with a plurality of reflecting surfaces. The plurality of reflecting surfaces have at least one optical axis, and the reflecting surfaces further include a linearly projected cross-section along a respective linear axis. A plurality of light emitting diodes (LEDs) are positioned in a line generally parallel to the linearly projected cross-section of the plurality of reflecting surfaces. The LEDs are oriented relative to an associated reflecting surface such that a central light-emitting axis of the plurality of LEDs is angled relative to the at least one optical axis of the associated reflecting surface at about 45°. The reflecting surfaces redirect and collimate a light output of the plurality of LEDs at an angle of about 45° with respect to the central light emitting axis of the plurality of LEDs.

Claims

1. A lighting system, comprising:

a housing;

a reflector arranged atop the housing, the reflector having;

a central axis;

a plurality of reflecting surfaces, the plurality of reflecting surfaces having at least one optical axis, each of the reflecting surfaces further including a linearly projected cross-section along a respective linear axis oriented generally orthogonally with respect to the central axis, and

a base side and an opposing, spaced-apart top side, the top side of the reflector being smaller in size than the base side, the base side of the reflector being oriented toward the housing and the top side being oriented away from the housing; and

a plurality of light emitting diodes (LEDs) positioned in a line generally parallel to the linearly projected cross-section of the plurality of reflecting surfaces, the LEDs being further positioned proximate the top side of the reflector and angled toward the housing, the LEDs being oriented relative to an associated reflecting surface such that a central light-emitting axis of the plurality of LEDs is angled relative to the at least one optical axis of the associated reflecting surface at about 45°

.

2. The lighting system of claim 1 wherein the about 45°

has a tolerance of ±

15°

.

3. The lighting system of claim 1 wherein the reflecting surfaces redirect and collimate a light output of the plurality of LEDs at an angle of about 45°

with respect to the central light emitting axis of the plurality of LEDs.

4. The lighting system of claim 3 wherein the about 45°

has a tolerance of ±

15°

.

5. The lighting system of claim 1 wherein the linearly projected cross-section of the reflecting surfaces comprises a substantially conic shape.

6. The lighting system of claim 1 wherein the reflector is a segmented reflector.

7. The lighting system of claim 1 wherein the linear axes of the reflecting surfaces are angled relative to each other.

8. The lighting system of claim 1 wherein at least one of the plurality of reflecting surfaces comprises at least one of highly-polished metal, a coated metal substrate, a coated nonmetal substrate, a reflective film applied to a metal substrate, or a reflective film applied to a nonmetal substrate.

9. The lighting system of claim 1, further including an auxiliary lighting assembly having at least one auxiliary light emitting diode, a central light emitting axis of the auxiliary light emitting diode being oriented away from the reflector.

10. The lighting system of claim 5 wherein the auxiliary light emitting diode emits infrared light.

11. The lighting system of claim 1, further including a lens, the lens surrounding the reflector and the LEDs.

12. The lighting system of claim 11, further including a heat sink atop the lens,

the heat sink being coupled to the housing, and

the LEDs being coupled to the heat sink.

13. The lighting system of claim 12 wherein the LEDs are mounted to at least one substrate, the at least one substrate being coupled to the heat sink.

14. The lighting system of claim 1, further including a control system, the control system having a driver coupled to the LEDs.

15. The lighting system of claim 14 wherein the control system further includes at least one of a GPS receiver, a clock, or a light sensor.

16. The lighting system of claim 14 wherein the control system further includes a communication link.