US20120307494A1 - Lighting method and system - Google Patents

Lighting method and system Download PDF

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Publication number
US20120307494A1
US20120307494A1 US13/584,506 US201213584506A US2012307494A1 US 20120307494 A1 US20120307494 A1 US 20120307494A1 US 201213584506 A US201213584506 A US 201213584506A US 2012307494 A1 US2012307494 A1 US 2012307494A1
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United States
Prior art keywords
light
surface
plurality
cradle
diffusive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/584,506
Inventor
Vadim Zlotnikov
William Elliott
Kent Solberg
Larry T. Taylor
Louis Pollaehn
Valeriy K. Berger
Dan Kelleher
Marty Masias
John B. Gunter
George Berman
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Luminator Holding LP
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Luminator Holding LP
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Publication date
Priority to US92721807P priority Critical
Priority to US4788208P priority
Priority to PCT/US2008/005689 priority patent/WO2008137076A1/en
Priority to US59608310A priority
Priority to US13/584,506 priority patent/US20120307494A1/en
Application filed by Luminator Holding LP filed Critical Luminator Holding LP
Assigned to LUMINATOR HOLDING LP reassignment LUMINATOR HOLDING LP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELLIOTT, WILLIAM, BERGER, VALERIY K., BERMAN, GEORGE, GUNTER, JOHN B., KELLEHER, DAN, MASIAS, MARTY, POLLAEHN, LOUIS, SOLBERG, KENT, TAYLOR, LARRY T., ZLOTNIKOV, VADIM
Publication of US20120307494A1 publication Critical patent/US20120307494A1/en
Assigned to GENERAL ELECTRIC CAPITAL CORPORATION, AS US AGENT reassignment GENERAL ELECTRIC CAPITAL CORPORATION, AS US AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUMINATOR HOLDING L.P.
Assigned to AMERICAN CAPITAL, LTD. reassignment AMERICAN CAPITAL, LTD. SECURITY INTEREST Assignors: LUMINATOR HOLDING L.P.
Assigned to ANTARES CAPITAL LP, AS SUCCESSOR AGENT reassignment ANTARES CAPITAL LP, AS SUCCESSOR AGENT ASSIGNMENT OF INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: GENERAL ELECTRIC CAPITAL CORPORATION, AS RETIRING AGENT
Assigned to LUMINATOR HOLDING L.P. reassignment LUMINATOR HOLDING L.P. RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 033053/0330 Assignors: AMERICAN CAPITAL, LTD.
Assigned to LUMINATOR HOLDING L.P. reassignment LUMINATOR HOLDING L.P. RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY COLLATERAL Assignors: ANTARES CAPITAL LP, AS US AGENT
Application status is Abandoned legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00Lighting devices or systems using a string or strip of light sources
    • F21S4/20Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00Lighting devices or systems using a string or strip of light sources
    • F21S4/20Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/47Passive cooling, e.g. using fins, thermal conductive elements or openings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02Combinations of only two kinds of elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00Fastening of light sources or lamp holders
    • F21V19/001Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0045Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/745Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/049Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • F21V3/0615Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass the material diffusing light, e.g. translucent glass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/002Refractors for light sources using microoptical elements for redirecting or diffusing light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/0008Reflectors for light sources providing for indirect lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/048Optical design with facets structure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/40Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors specially adapted for specific vehicle types
    • B60Q3/41Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors specially adapted for specific vehicle types for mass transit vehicles, e.g. buses
    • B60Q3/43General lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/34Supporting elements displaceable along a guiding element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

A lighting system including a light-emitting diode cradle securing at least one light-emitting diode and a modular unit comprising an arcuate portion, the arcuate portion comprising at least one diffusive reflective surface adapted to receive and reflect light from the at least one light-emitting diode. The lighting system further includes a diffusive transmissive element adapted to receive light reflected by the diffusive reflective surface and provide diffused light to an area requiring illumination.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This patent application is a continuation of U.S. patent application Ser. No. 12/596,083, filed Aug. 24, 2010. U.S. patent application Ser. No. 12/596,083 claims priority from and incorporates by reference the entire disclosure of, U.S. Provisional Patent Application No. 60/927,218, filed May 2, 2007 and U.S. Provisional Patent Application No. 61/047,882, filed Apr. 25, 2008. U.S. patent application Ser. No. 12/596,083, U.S. Provisional Patent Application No. 60/927,218, and U.S. Provisional Patent Application No. 61/047,882 are each incorporated herein by reference.
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to methods of and systems for lighting and, more particularly, but not by way of limitation, to a LED lighting system for buses, trains, and the like affording improved lighting and simplifying maintenance and replacement of light sources therein.
  • 2. History of Related Art
  • Commercial transportation vehicles have been accommodating the needs of passengers for well over a century. Of the passenger safety and comfort considerations addressed in designs of commercial transportation vehicles is the lighting system therein. Contemporary commercial vehicles such as buses utilize commercially available lighting fixtures for the safety and convenience of the bus passengers. These fixtures often incorporate conventional light technology such as fluorescent bulbs which inherently have certain functional, liability and safety considerations. These considerations include the fact that the lamps are manufactured with an electrical terminal on each end and, when installed into the lighting system, the electrical sockets block the light from the lamp. This can create dark spots within the lighted environment. An additional aspect is the fact that fluorescent lamps are manufactured and available in discrete sizes. Not all areas to be lighted are of the same size or are particularly adapted to the discrete sizes for which the lamps are manufactured. This design limitation also leads to dark areas in applications where the lamp needed for the lighting system is between the available lamp sizes.
  • Other safety considerations must also be considered. Fluorescent lamps operate on high voltage, alternating current which creates “arcing” within the lamp as part of the light generating process. Fluorescent lamps that have reached “end of life” do not generate light in any section of the entire lamp length, which creates large dark areas in the application environment. This fact also leads to the requirement for regular maintenance which is both costly and time consuming. An additional safety issue is the fact that fluorescent lamps contain mercury, argon or neon gas, and phosphor; which requires special disposal practices to prevent environmental issues. Likewise, if the lamp is broken within a contained environment, such as a bus, there are passenger safety issues and contamination aspects that must be dealt with.
  • Finally, fluorescent lamps, as described above, experience diminished operational life due to the application environment and increased repetitive on/off power cycling. This cycling increases the occurrence of lamp replacement and the opportunity for harm to personnel and environment, which may require the need for increased personnel training.
  • The disadvantages of fluorescent lights can be overcome with the use of the innovated light source system known as light emitting diodes (LEDs). Lighting systems based on LEDs have advantages over traditional fluorescent lighting systems, including the fact that they do not contain dangerous gasses and the fact that their operational life is not diminished by repetitive on/off power cycling.
  • Additionally, it has been recognized that LED lighting systems can be constructed in select lengths and lighting effects. For example, LED lighting systems can be controlled to vary both color and brightness to create subtle lighting effects, such as sunrise, sunset, and mood lighting, and as well as appropriate ambient lighting for reading and the like. Because of these and other advantages, LED lighting systems are rapidly replacing traditional fluorescent lighting systems in a number of environments, including transportation, military, commercial, and home environments.
  • Some LED lighting systems include lighting devices that can generate light of variable color and intensity under processor control. Multiple lighting devices of a modular design can be incorporated into lighting systems to illuminate larger areas. A lighting module may include, for example, groups of LEDs, each of which generates light of a different color and whose intensity can be controlled.
  • SUMMARY OF THE INVENTION
  • A lighting system including a light-emitting diode cradle securing at least one light-emitting diode and a modular unit comprising an arcuate portion, the arcuate portion comprising at least one diffusive reflective surface adapted to receive and reflect light from the at least one light-emitting diode. The lighting system further includes a diffusive transmissive element adapted to receive light reflected by the diffusive reflective surface and provide diffused light to an area requiring illumination.
  • A lighting system including a cradle securing at least one light-emitting element. The cradle includes a U-shaped groove, an elongate surface extending from the U-shaped groove, and a locking tab comprising an upwardly extending latch. The lighting system further includes a modular unit. The modular unit includes a mouth region receiving at least part of and achieving interlocking engagement with the cradle. The mouth region includes a first surface and a second surface oppositely disposed relative to the first surface and comprising a lip abutting and matingly engaging the U-shaped groove, the lip forming a track receiving the elongate surface. The modular unit further includes a neck region comprising a groove, the groove receiving and engaging the upwardly extending latch of the locking tab and an arcuate portion extending from the second surface and comprising a diffusive reflective surface receiving light from the at least one light-emitting element.
  • A method includes providing a cradle. The cradle includes a main body, a first outwardly extending elongate surface extending from a first side of the main body, a plurality of locking tabs extending from a second side of the main body, and a plurality of outwardly extending reflective tabs located adjacent each of a plurality of openings. The method further includes providing a modular unit. The modular unit includes an arcuate portion, a mouth region connected to the arcuate portion and comprising oppositely disposed first surface and second surfaces, a track formed between the second surface and a lip, and a neck region comprising a groove. The method further includes inserting the cradle into the modular unit via an opening between the arcuate portion and a surface extending downwardly from the groove, positioning the cradle so that a U-shaped groove of the cradle is above the lip, cantilevering the cradle against the surface until the first outwardly extending elongate surface of the cradle is positioned above the track, and applying pressure against the plurality of locking tabs towards the surface.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • A more complete understanding of the lighting method and system may be obtained by reference to the following Detailed Description when taken in conjunction with the accompanying Drawings wherein:
  • FIG. 1 is an exploded perspective view of an LED lighting system;
  • FIG. 2A is a front perspective view of an LED cradle with an LED Printed Wiring Assembly (PWA) mounted thereto;
  • FIG. 2B is a back perspective view of an LED cradle with an LED PWA mounted thereto;
  • FIG. 3A is a front perspective view of an LED cradle without an LED PWA mounted thereto;
  • FIG. 3B is a back perspective view of an LED cradle without an LED PWA mounted thereto;
  • FIG. 3C is a top view of an LED cradle without an LED PWA mounted thereto;
  • FIG. 3D is a cross-sectional view of the LED cradle of FIG. 3C;
  • FIG. 4 is a front perspective view of an LED cradle with connectors attached thereto;
  • FIG. 5 is an enlarged side view of an LED lighting system;
  • FIG. 6 is a partial cross-section of an LED lighting system showing reflective and refractive properties thereof; and
  • FIG. 7 is a flow diagram illustrating a process of engaging an LED cradle with a modular unit.
  • DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS OF THE INVENTION
  • Various embodiments of the present invention will now be described more fully with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be constructed as limited to the embodiments set forth herein; rather, the embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
  • Despite the numerous potential benefits of LED lighting, implementation of LED lights into transportation vehicles has been suppressed due to difficulties accomplishing fast installation and replacement of LED printed wiring assembly (PWA). Known LED fixtures typically use multiple fasteners with a high density across the PWA in order to create uniform pressure on a thermal pad between the PWA and a heat sink.
  • With the introduction of LED-based light sources, improved light diffusion and ease of maintenance have become significant design goals. In addition, ease of replacement of the light sources and weight of the light sources have become increasingly important. Moreover, the use of improved reflecting surfaces and light-diffusing surfaces to provide human-friendly LED-based light often makes access to the mounting fasteners difficult and can significantly increase maintenance time.
  • Referring generally to various of the FIGURES, systems are shown that include a modular unit. The modular unit includes a reflective component. The systems also includes a diffusive transmissive element. The modular unit includes, in one embodiment, a receiving portion for receiving an LED cradle that holds a replaceable LED PWA. The LED cradle is adapted to lockably mount into the receiving portion of the modular unit so that sufficient pressure is applied against the LED PWA to permit adequate heat flow from the LED PWA through a thermal heat pad to a heat sink.
  • FIG. 1 is an exploded perspective view of an LED lighting system 100. The LED lighting system 100 includes a modular unit 102, a diffusive transmissive element 104, and an LED cradle 106. The LED cradle 106 is shown with a PWA 206 attached thereto and is adapted to be secured to the modular unit 102 along a track 112 formed in the modular unit 102. The LED lighting system 100 also includes circuitry 108 adapted to provide power to and control a plurality of LEDs (not explicitly shown) attached to the LED cradle 106. The circuitry 108 may be attached to the modular unit 102 permanently via fasteners such as, for example, rivets or screws.
  • The modular unit 102 is, in a typical embodiment, in the form of a unitary heat-conductive rigid material such as, for example, an extruded piece of aluminum. The modular unit 102 includes an arcuate portion 114 contiguous to and directly extending from a mouth region. In addition to the above, the modular unit 102 not only forms the arcuate portion 114, but also serves as a heat sink for the plurality of LEDs 202 and is a structural support component of the LED lighting system 100. The arcuate portion 114 includes a diffusive reflective surface 116. The diffusive reflective surface 116 is adapted to diffuse and reflect light emitted by the plurality of LEDs attached to the PWA 206 mounted to the LED cradle 106. In a typical embodiment, the LED cradle 106 is positioned along the track 112 of the modular unit 102 so that light output from the plurality of LEDs is directed onto the diffusive reflective surface 116 at an acute angle relative to a normal axis of a given point on the diffusive reflective surface 116. The LEDs are typically positioned on the PWA 206 so as to maximally illuminate the reflective diffusive surface 116.
  • Heat dissipation is typically a consideration when dealing with light sources; dissipation of heat generated by LEDs is no exception. The modular unit 102 includes a plurality of heat-dissipation fins 110 extending outwardly of the modular unit 102. The plurality of heat-dissipation fins 110 are adapted for thermal transfer from the LED cradle 106 when positioned along the track 112 of the modular unit 102. The modular unit 102 also includes a groove 115 running on an outer surface thereof. The groove 115 facilitates attachment of the LED cradle 106 to the modular unit 102.
  • The diffusive transmissive element 104 may be, for example, a lens or cover. In a typical embodiment, the diffusive transmissive element 104 is secured to the modular unit 102 via, for example, fasteners. In some embodiments, the diffusive transmissive element 104 is secured in a groove (not explicitly shown) of the modular unit 102 that runs along an inside edge the modular unit 102. The diffusive transmissive element 104 may be, for example, transparent or translucent and may be chosen for its light transmissive and diffusive properties.
  • The diffusive transmissive element 104, in a typical embodiment, achieves light diffusion and may be formed as a lens having inward-curving surfaces such as, for example, a concave lens. The diffusive transmissive element 104 may be in the form of a plastic lens body economically fabricated, for example, by extrusion molding to form a unitary piece. The diffusive transmissive element 104 in the illustrated embodiment serves to diffuse light emanating from the plurality of LEDs towards an area to be illuminated. The diffusive transmissive element 104 is also typically adapted to provide uniform illumination of a desired area. In a typical embodiment, the diffusive transmissive element 104 may possess light transmissivity of about 60% and angular scattering of ±20°. In some embodiments, the diffusive transmissive element 104 may possess light transmissivity of greater than 80%.
  • In a typical application, it is necessary to have two surfaces on which light is incident in order to obtain adequate diffusion of light output by the LED lighting system 100 via angular scattering of light output by the plurality of LEDs 202. It has been found that a single surface (i.e., a lens or a reflector) does not provide adequate diffusion in applications in which it is desired that individual ones of the plurality of LEDs 202 not be discernible by a user of the LED lighting system 100.
  • In a given application having an envelope (e.g., available space) within which to place the LED lighting system 100, a typical design objective is to place the two surfaces as far apart from one another as possible in order to maximize the diffusion of light originating at the plurality of LEDs 202 in order to make individual ones of the plurality of LEDs 202 not discernible by a user. The LED lighting system 100 takes advantage of this fact by utilizing the diffusive reflective surface 116 of the arcuate portion 114 and the diffusive transmissive element 104 rather than two diffusive transmissive elements 104. Use of the diffusive reflective surface 116 and the diffusive transmissive element 104 permits the distance between the two surfaces (i.e., the diffusive reflective surface 116 and the diffusive transmissive element 104) to be maximized within an envelope of minimal space.
  • The LED lighting system 100 permits much of the light emanating from the plurality of LEDs 202 to be diffused initially by the diffusive reflective surface 116. Light that is thus diffused by the diffusive reflective surface 116 strikes the diffusive transmissive element 104 and is diffused yet again, resulting in more diffusion via angular scattering and thus a smoother light output that, in effect, makes individual ones of the plurality of LEDs 202 indiscernible to a user of the LED lighting system 100.
  • FIG. 2A is a front perspective view of the LED cradle 106 with the LED PWA 206 mounted thereto. The LED cradle 106 is adapted to secure the plurality of LEDs 202 located on the PWA 206. The LED cradle 106 may be formed of a flexible material such as, for example, polycarbonate, plastic, or the like and is typically made of a unitary piece of material. In some embodiments, the LED cradle 106 may be formed of, for example, a non-flammable and non-toxic material. The plurality of LEDs 202 may emit any suitably colored light such as, for example, white, blue, green, red, yellow, amber, or orange. The PWA 206 accepts the mounting of the same color LEDs or accepts the mounting of different color LEDs.
  • The LED cradle 106 includes a main body 211 and a first outwardly extending elongate surface 210 extending from a first side of the main body 211. The elongate surface 210 is adapted to abut and matingly engage with the track 112 of the modular unit 102. The LED cradle 106 also includes a plurality of locking tabs 208 extending inwardly at a bottom of the LED cradle 106 and extending from a second side of the main body 211. The locking tabs 208 each include an upwardly extending latch 209 (shown in FIG. 2B) for engagement with the groove 115 of the modular unit 102. The LED cradle 106 also includes, in a typical embodiment, a plurality of outwardly extending reflective tabs 204 located above each of the plurality of LEDs 202. In other embodiment, the plurality of reflective tabs 204 may be replaced with a unitary outwardly extending surface for performing the same functions as the plurality of reflective tabs 204. The plurality of reflective tabs 204 are adapted to reflect and diffuse light emitted by the plurality of LEDs 202. The plurality of reflective tabs 204 may be formed of, for example, a white plastic or other material having reflective and diffusive properties. In other embodiments, the reflective tabs 204 may be painted with a reflective and diffusive material. In a typical embodiment, the plurality of reflective tabs 204 may have a reflectivity on the order of 90%. In other embodiments, the reflectivity may be much higher or much lower as design considerations dictate. The LED cradle 106 shown in FIG. 2A having 10 LEDs 202 mounted in the PWA 206 is for illustrative purposes only. The LED cradle 106 may be constructed of any length and may be adapted to accommodate any number of LEDs 202 in the PWA 206 as desired.
  • FIG. 2B is a back perspective view of the LED cradle 106 with the LED PWA 206 attached thereto. A thermal pad 212 is shown in contact with the LED PWA 206. The thermal pad 212 facilitates thermal conduction from the PWA 206 to the modular unit 102. As will be shown in more detail below, the thermal pad 212 is mounted so as to create a direct thermal path between the LED PWA 206 and the LED cradle 106. This direct thermal path facilitates heat dissipation and cooling of the LEDs 202. The LED cradle 106 is adapted to lockably mount into the modular unit 102 and provide sufficient pressure to permit heat flow from the LED PWA 206 through the thermal pad 212 to a heat sink such as, for example, the modular unit 102.
  • The thermal pad 212 may be formed of any suitable thermally conductive material. In some embodiments, the thermal pad 212 is a preformed solid. In a typical embodiment, the thermal pad 212 may be attached to a back side 240 of the LED PWA 206 before installation of the LED PWA 206. However, in some embodiments, the thermal pad 212 my be secured against the backside 240 of the LED PWA 206 during installation. In some embodiments, the thermal pad 212 is not a solid and may be, for example, a thermal grease applied to a back side of the LED PWA 206. The LED cradle 106 also includes the plurality of locking tabs 208. Each of the locking tabs 208 includes one upwardly extending latch 209 for engagement with the groove 115 of the modular unit 102.
  • FIG. 3A is a front perspective view of the LED cradle 106 without the LED PWA 206 attached thereto. The LED cradle 106 includes the outwardly extending elongate surface 210. As noted above, the elongate surface 210 is adapted to abut and matingly engage with the track 112 of the modular unit 102. The LED cradle 106 also a plurality of openings 312 through which the plurality of LEDs 202 can pass and light emitted therefrom can be seen. The LED cradle 106 also includes the plurality of outwardly extending reflective tabs 204 located above each of the plurality of openings 312. The plurality of reflective tabs 204 are adapted to reflect and diffuse light from the plurality of LEDs 202.
  • FIG. 3B is a back perspective view of the LED cradle 106 without the LED PWA 206 attached thereto. In this view of the LED cradle 106, the LED PWA 206, the plurality of LEDs 202, and the thermal pad 212 are not shown. The plurality of reflective tabs 204 are adapted to reflect and diffuse light emitted by the plurality LEDs 202. In various embodiments, the reflective tabs 204 may include, for example, a white plastic or other material having reflective and/or diffusive properties. In some embodiments, the reflective tabs 204 may be painted with a reflective or diffusive material.
  • The LED cradle 106 has formed therein the plurality of openings 312 through which the LEDs 202 can pass and light emitted therefrom can be seen. The LED cradle 106 also includes the plurality of inwardly extending locking tabs 208. The locking tabs 208 each include an upwardly extending latch 209. The locking latches 209 engage with the groove 115 of the modular unit 102. The LED cradle 106 also includes a plurality of locking latches 320 on an upper portion of the LED cradle 106. The plurality of locking latches 320 may be, for example, tabs for securing an upper end of the LED PWA 206 to the LED module 106.
  • FIG. 3C is a top view of the LED cradle 106 without the LED PWA 206 attached thereto. This view illustrates, among other things, the plurality of outwardly extending reflective tabs 204. The plurality of inwardly extending locking tabs 208 at a bottom of the LED cradle 106 are also illustrated. Each of the locking tabs 208 includes one of the latches 209 for mating engagement with the groove 115.
  • FIG. 3D is a cross-sectional view of the LED cradle 106. In this view, which is along line B-B of FIG. 3C, the cross section is taken of the LED cradle 106 through one of the openings 312 through which the LEDs 202 pass. FIG. 3D also illustrates the outwardly extending elongate surface 210, the outwardly extending reflective tabs 204, and a U-shaped groove 340 formed between the elongate surface 210 and the reflective tab 204. The U-shaped groove 340 is adapted to abut and matingly engage with a lip region (shown in FIG. 5) of the modular unit 102. FIG. 3D also illustrates one of the openings 312 through which one of the LEDs 202 passes. One of the locking latches 320 is also illustrated. The locking latch 320 shown may be, for example, a tab for securing an upper end of the LED PWA 206 to the LED cradle 106. FIG. 3D also illustrates at least one of the locking tabs 208, which extends inwardly at a bottom of the LED cradle 106. The locking tabs 208 include the upwardly extending latch 209 for engagement with the groove 115 of the modular unit 102.
  • FIG. 4 is a front perspective view of the LED cradle 106 with connectors 105 attached. The connectors 105 are used to connect the LED cradle 106 with the circuitry 108. The circuitry 108 is used to provide power to the plurality of LEDs 202 and to provide control of the plurality of LEDs 202.
  • FIG. 5 is an enlarged side view of the LED lighting system 100. From this view, it can be seen that the LED cradle 106 is adapted so that the LED PWA 206 fits against a backside 520 of the LED cradle 106. In the embodiment shown, a portion of one of the LEDs 202 can be seen extending through the LED cradle 106. In some embodiments, the LED 202 may not extend outwardly through the LED cradle 106.
  • The modular unit 102 is, in a typical embodiment, in the form of a unitary extruded piece of aluminum housing 502. The modular unit 102 includes the arcuate portion 114 contiguous to and directly extending from a mouth region 504. The mouth region 504 is formed with a pair of oppositely disposed, generally J-shaped, surfaces 506 and 508. The oppositely disposed J-shaped surfaces 506 and 508 are adapted for receiving a portion of the LED cradle 106 therein for interlocking engagement therewith. The J-shaped surface 508 includes a lip 510 extending therefrom forming the track 112 therebetween. The track 112 may be, for example, a mounting cavity for receiving the elongate surface 210 of the LED cradle 106. Furthermore, the lip 510 is adapted to abut and matingly engage the U-shaped groove 340 of the LED cradle 106. The housing 502 also includes a mounting cavity 514 on an outside surface thereof. The mounting cavity 514 is adapted to receive an elongate surface 515 of the diffusive transmissive element 104 for interlocking engagement therewith. The housing 502 also includes a neck region having the groove 115 and a surface 524 extending downwardly from the groove 115. The groove 115 is adapted to receive and engage the upwardly extending latches 209 of the locking tabs 208.
  • The arcuate portion 114 includes the diffusive reflective surface 116. In a typical embodiment, the LED cradle 106 is positioned along the track 112 of the housing 502 so that light emitted from the plurality of LEDs 202 is directed onto the diffusive reflective surface 116 at an acute angle relative to a normal axis of a given point on the diffusive reflective surface 116. In a typical embodiment, the diffusive reflective surface 116 may be formed of, for example, a white plastic or other material having reflective qualities. In other embodiments, the diffusive reflective surface 116 may be painted with a reflective material. The diffusive reflective surface 116 is adapted to diffuse and reflect light emitted by the plurality of LEDs 202. In a typical embodiment, the diffusive reflective surface 116 should exhibit reflectivity of incident light that is as great as possible. However, it is often the case that materials or coatings that provide maximal reflectivity are cost prohibitive. Therefore, in many applications, a minimal acceptable reflectivity such as, for example, 60±15% is employed. The greater the reflectivity exhibited by the diffusive reflective surface 116, the fewer LEDs 202 necessary or the less power needed to drive the LEDs 202.
  • The LEDs are typically mounted in a pattern in order to maximally illuminate the diffusive reflective surface 116. To further improve light output of the modular unit 102, the LED cradle 106 also includes the plurality of outwardly extending reflective tabs 204 located above each of the plurality of LEDs 202. The plurality of reflective tabs 204 are adapted to reflect and diffuse light emitted by the LEDs 202. In various embodiments, the reflective tabs 204 may include, for example, a white plastic or other material having reflective qualities. In some embodiments, the reflective tabs 204 may be painted with a reflective material.
  • The housing 502 also includes the plurality of heat-dissipation fins 110 extending outwardly therefrom. The plurality of heat-dissipation fins 110 are adapted for thermal transfer from the LED cradle 106 positioned along the track 112 of the modular unit 102.
  • The thermal pad 212 is shown pressed against the LED PWA 206 for thermal conduction from the PWA 206 to the modular unit 102. The thermal pad 212 is mounted in such a way so as to create a direct thermal path between the LED PWA 206 and the modular unit 102. This direct thermal path facilitates heat dissipation and cooling for the plurality of LEDs 202. The LED cradle 106 is adapted to lockably mount into the modular unit 102 and provide sufficient pressure to permit heat flow from the LED PWA 206 through the thermal pad 212 to a heat sink such as, for example, the modular unit 102. In other embodiments, the LCD cradle 106 may be attached to the modular unit 102 permanently via fasteners such as, for example, rivets or screws.
  • FIG. 6 is a partial cross-section of an LED lighting system showing reflective and refractive properties thereof. The LED lighting system 600 includes a diffusive transmissive element 602, an arcuate portion 604 of the modular unit having a diffusive reflective surface 606, and an LED 608. The LED 608 emits light in an approximately cone-shaped pattern that ranges from approximately 0 to approximately 90 degrees relative to a primary direction in which the LED 608 is aimed. Various rays of emitted light are illustrated in FIG. 6 to demonstrate the reflective and diffusive (i.e., scattering) properties of the diffusive reflective surface 606 of the arcuate portion 604 and the transmissive and scattering properties of the diffusive transmissive element 602. It will thus be apparent that the combination of the diffusive transmissive element 602 and the arcuate portion 604 having the diffusive reflective surface 606 results in a smoothing effect of light passing through the diffusive transmissive element 602 and visible to a user.
  • In a typical embodiment, the diffusive transmissive element 602 should exhibit as great transmissivity of light as possible. However, in many cases, transmissivity of the diffusive transmissive element 602 and diffusive properties of the diffusive transmissive element 602 are, to at least some degree, inversely related. In other words, in a typical embodiment, the greater the transmissivity of the diffusive transmissive element 602, the less the diffusive properties of the diffusive transmissive element 602. In at least one embodiment, it has been demonstrated that no greater than 60% transmissivity is permissible for the diffusive transmissive element 602 in order to obtain adequate diffusion of light in order to make individual ones of the plurality of LEDs 202 imperceptible to a user.
  • In addition to the above, in a typical embodiment, an angle of scattering of at least ±20 degrees relative to an incident ray of light is an acceptable property of the diffusive transmissive element 602. In other words, in a typical embodiment, light incident on the diffusive transmissive element 602 is scattered within a cone of up to 20 degrees from the angle at which the incident ray of light struck the diffusive transmissive element 602.
  • FIG. 7 is a flow diagram illustrating a process 700 of engaging the LED cradle 106 with the modular unit 102. At step 702, the LED cradle 106 is inserted into the modular unit 102 via an opening formed between the arcuate portion 114 and the surface 524 extending downwardly from the groove 115 of the modular unit. At step 704, the LED cradle 106 is positioned so that the U-shaped groove 340 of the LED cradle 106 is above the lip 510 of the modular unit 102. At step 706, the LED cradle 106 is cantilevered against the surface 524 until the elongate surface 210 of the LED cradle 106 is positioned above the track 112 formed between the J-shaped surface 508 and the lip 510 of the modular unit 102. At step 708, pressure is applied against the plurality of locking tabs 208 towards the surface 524 until the plurality of locking tabs 208 are in contact with the surface 524 of the modular unit and the plurality of upwardly extending latches 209 overlap the groove 115, the lip 510 of the modular unit 102 matingly engages the U-shaped groove 340 of the LED cradle 106, and elongate surface 210 of the LED cradle 106 is received within the track 112 of the modular end. At step 710, the process ends.
  • Although various embodiments of the method and apparatus of the present invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the spirit of the invention as set forth herein.

Claims (20)

1. A lighting system comprising:
a light-emitting diode cradle securing at least one light-emitting diode;
a modular unit comprising an arcuate portion, the arcuate portion comprising at least one diffusive reflective surface adapted to receive and reflect light from the at least one light-emitting diode; and
a diffusive transmissive element adapted to receive light reflected by the diffusive reflective surface and provide diffused light to an area requiring illumination.
2. The system of claim 1, wherein the light-emitting diode cradle further comprises:
a main body having at least one opening for receiving the at least one light-emitting diode;
a first outwardly extending elongate surface extending from a first side of the main body and engaging with a track of the modular unit;
a plurality of locking tabs extending from a second side of the main body;
wherein each locking tab of the plurality of locking tabs comprises an upwardly extending latch for engaging a groove of the modular unit; and
a plurality of outwardly extending reflective tabs located adjacent each of the plurality of openings.
3. The system of claim 2, wherein the plurality of outwardly extending reflective tabs reflect and diffuse light emitted by the at least one light-emitting diode onto the at least one diffusive reflective surface.
4. The system of claim 3, wherein the plurality of outwardly extending reflective tabs are painted with a reflective and diffusive material.
5. The system of claim 1, wherein the modular unit further comprises:
a mouth region connected to the arcuate portion and comprising a first surface and a second surface;
wherein the first and second surfaces are oppositely disposed;
a track formed between the second surface and a lip;
a mounting cavity receiving the diffusive transmissive element on an outside surface of the modular unit; and
a neck region comprising a groove interfacing with a portion of the light-emitting diode cradle.
6. The system of claim 1, wherein the first and second surfaces are generally J-shaped.
7. The system of claim 1, wherein the diffusive transmissive element comprises a lens having inward-curving surfaces toward the at least one light-emitting diode.
8. The system of claim 1, wherein the diffusive transmissive element is adapted to provide light transmissivity of about 60% and angular scattering of about ±20°.
9. The system of claim 1, wherein the modular unit is formed of a unitary heat-conductive rigid material.
10. The system of claim 9, wherein the heat-conductive rigid material comprises aluminum.
11. The system of claim 1, wherein the light-emitting diode cradle is positioned relative to the modular unit so that light output from the at least one light-emitting diode is directed onto the at least one diffusive reflective surface at an acute angle relative to a normal axis of a given point on the at least one diffusive reflective surface.
12. The system of claim 1, wherein the at least one diffusive reflective surface is painted with a reflective material.
13. The system of claim 1, wherein the at least one diffusive reflective surface is adapted to provide light reflectivity of about 60%.
14. A lighting system comprising:
a cradle securing at least one light-emitting element, the cradle comprising:
a U-shaped groove;
an elongate surface extending from the U-shaped groove;
a locking tab comprising an upwardly extending latch;
a modular unit comprising:
a mouth region receiving at least part of and achieving interlocking engagement with the cradle, the mouth region comprising:
a first surface;
a second surface oppositely disposed relative to the first surface and comprising a lip abutting and matingly engaging the U-shaped groove, the lip forming a track receiving the elongate surface;
a neck region comprising a groove, the groove receiving and engaging the upwardly extending latch of the locking tab; and
an arcuate portion extending from the second surface and comprising a diffusive reflective surface receiving light from the at least one light-emitting element.
15. The lighting system of claim 14, further comprising:
a plurality of openings for receiving the at least one light-emitting diode; and
a plurality of outwardly extending reflective tabs located adjacent each of the plurality of openings.
16. The lighting system of claim 15, wherein the plurality of outwardly extending reflective tabs are adapted to reflect and diffuse light emitted by the at least one light-emitting diode onto the diffusive reflective surface.
17. The lighting system of claim 16, wherein the plurality of outwardly extending reflective tabs are painted with a reflective and diffusive material.
18. The lighting system of claim 14, wherein the modular unit is formed of a unitary heat-conductive rigid material.
19. The lighting system of claim 14, wherein the cradle is positioned relative to the modular unit so that light output from the at least one light-emitting element is directed onto the diffusive reflective surface at an acute angle relative to a normal axis of a given point on the diffusive reflective surface.
20. A method comprising:
providing a cradle comprising:
a main body;
a first outwardly extending elongate surface extending from a first side of the main body;
a plurality of locking tabs extending from a second side of the main body;
a plurality of outwardly extending reflective tabs located adjacent each of a plurality of openings; and
a groove formed between the first outwardly extending elongate surface and the plurality of outwardly extending reflective tabs;
providing a modular unit comprising:
an arcuate portion;
a mouth region connected to the arcuate portion and comprising oppositely disposed first surface and second surfaces;
a track formed between the second surface and a lip; and
a neck region comprising a groove;
inserting the cradle into the modular unit via an opening between the arcuate portion and a surface extending downwardly from the groove;
positioning the cradle so that the groove of the cradle is above the lip;
cantilevering the cradle against the surface extending downwardly from the groove until the first outwardly extending elongate surface of the cradle is positioned above the track; and
applying pressure against the plurality of locking tabs towards the surface.
US13/584,506 2007-05-02 2012-08-13 Lighting method and system Abandoned US20120307494A1 (en)

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US59608310A true 2010-08-24 2010-08-24
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120069568A1 (en) * 2008-10-31 2012-03-22 Osram Gesellschaft Mit Beschraenkter Haftung Lighting module and corresponding method
EP2868962A1 (en) * 2013-11-04 2015-05-06 Luminator Holding, L.P. Lighting housing with led illumination insert
US9565782B2 (en) 2013-02-15 2017-02-07 Ecosense Lighting Inc. Field replaceable power supply cartridge
US9568665B2 (en) 2015-03-03 2017-02-14 Ecosense Lighting Inc. Lighting systems including lens modules for selectable light distribution
USD782093S1 (en) 2015-07-20 2017-03-21 Ecosense Lighting Inc. LED luminaire having a mounting system
USD782094S1 (en) 2015-07-20 2017-03-21 Ecosense Lighting Inc. LED luminaire having a mounting system
USD785218S1 (en) 2015-07-06 2017-04-25 Ecosense Lighting Inc. LED luminaire having a mounting system
US9651216B2 (en) 2015-03-03 2017-05-16 Ecosense Lighting Inc. Lighting systems including asymmetric lens modules for selectable light distribution
US9651227B2 (en) 2015-03-03 2017-05-16 Ecosense Lighting Inc. Low-profile lighting system having pivotable lighting enclosure
US9651232B1 (en) 2015-08-03 2017-05-16 Ecosense Lighting Inc. Lighting system having a mounting device
US9746159B1 (en) 2015-03-03 2017-08-29 Ecosense Lighting Inc. Lighting system having a sealing system
US9788382B2 (en) 2008-09-24 2017-10-10 Luminator Holding Lp Methods and systems for maintaining the illumination intensity of light emitting diodes
US9869450B2 (en) 2015-02-09 2018-01-16 Ecosense Lighting Inc. Lighting systems having a truncated parabolic- or hyperbolic-conical light reflector, or a total internal reflection lens; and having another light reflector

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8262253B2 (en) * 2007-05-02 2012-09-11 Luminator Holding Lp Lighting method and system
FR2949533B1 (en) * 2009-08-28 2012-08-24 Olivier Pinon Furniture electric lighting
CA2726179C (en) * 2009-12-22 2019-02-19 Virginia Optoelectronics, Inc. Light emitting diode light source modules
DE102010021113A1 (en) * 2010-05-20 2011-11-24 Hella Kgaa Hueck & Co. lighting system
EP2463573A1 (en) * 2010-12-10 2012-06-13 Multilist Sweden AB A device and a method for mounting a strip of light emitting diodes
US8794811B2 (en) * 2011-03-16 2014-08-05 GE Lighting Solutions, LLC Edge-illuminated flat panel and light module for same
CN103185225A (en) * 2011-12-28 2013-07-03 上海三思电子工程有限公司 Reflection-type LED (Light Emitting Diode) lighting lamp structure and lighting device
US9103535B1 (en) * 2012-03-20 2015-08-11 Molly Strobel Decorative lights installation systems
DE102013207175A1 (en) * 2013-04-19 2014-10-23 Itz Innovations- Und Technologiezentrum Gmbh lamp module
DE102014202855A1 (en) * 2014-02-17 2015-08-20 Siemens Aktiengesellschaft Lighting device for a rail vehicle
DE102016205100A1 (en) * 2016-03-29 2017-11-09 Siemens Aktiengesellschaft Lighting apparatus and method for illuminating a passenger compartment ceiling of a vehicle
DE102017208999A1 (en) * 2017-05-29 2018-11-29 Volkswagen Aktiengesellschaft Lighting device for illuminating the interior of a motor vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8262253B2 (en) * 2007-05-02 2012-09-11 Luminator Holding Lp Lighting method and system

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2011239C (en) * 1990-03-01 2000-10-17 Dominique Dallaire Construction kit for horizontally and vertically sliding window assemblies
US5839823A (en) * 1996-03-26 1998-11-24 Alliedsignal Inc. Back-coupled illumination system with light recycling
US6720745B2 (en) * 1997-08-26 2004-04-13 Color Kinetics, Incorporated Data delivery track
US6094292A (en) 1997-10-15 2000-07-25 Trustees Of Tufts College Electrochromic window with high reflectivity modulation
US6451027B1 (en) * 1998-12-16 2002-09-17 Intuitive Surgical, Inc. Devices and methods for moving an image capture device in telesurgical systems
NZ515195A (en) * 1999-05-20 2003-04-29 Zumtobel Staff Gmbh Lighting optical element for uniform light distribution and anti dazzling effects
US6786625B2 (en) * 1999-05-24 2004-09-07 Jam Strait, Inc. LED light module for vehicles
US7071762B2 (en) * 2001-01-31 2006-07-04 Koninklijke Philips Electronics N.V. Supply assembly for a led lighting module
DE10015759C2 (en) * 2000-03-30 2002-06-20 Sidler Gmbh & Co Automotive interior light
DE10033502A1 (en) * 2000-07-10 2002-01-31 Osram Opto Semiconductors Gmbh An optoelectronic module, process for its preparation and its use
US7168843B2 (en) * 2000-09-29 2007-01-30 Suncor Stainless, Inc. Modular lighting bar
US6578986B2 (en) * 2001-06-29 2003-06-17 Permlight Products, Inc. Modular mounting arrangement and method for light emitting diodes
AU2002359708A1 (en) * 2001-12-14 2003-07-15 Digital Optics International Corporation Uniform illumination system
US6803732B2 (en) * 2001-12-20 2004-10-12 Osram Opto Semiconductors Gmbh LED array and LED module with chains of LEDs connected in parallel
DE10216394B3 (en) * 2002-04-12 2004-01-08 Osram Opto Semiconductors Gmbh LED module
JP4153370B2 (en) * 2002-07-04 2008-09-24 株式会社小糸製作所 The vehicle lamp
US7231734B2 (en) * 2003-02-03 2007-06-19 Luminator Holding, L.P. Display device with rail support
US7114827B2 (en) * 2003-03-17 2006-10-03 Syair Designs Llc Lighting assembly
KR100611972B1 (en) * 2003-06-10 2006-08-11 삼성전자주식회사 Micro light emitting module and projection display using the same
US7128450B2 (en) * 2003-06-27 2006-10-31 Lear Corporation Modular light assembly and method for installing a modular light assembly in a vehicle
DE10335077A1 (en) * 2003-07-31 2005-03-03 Osram Opto Semiconductors Gmbh LED module
US7102172B2 (en) * 2003-10-09 2006-09-05 Permlight Products, Inc. LED luminaire
US7344279B2 (en) * 2003-12-11 2008-03-18 Philips Solid-State Lighting Solutions, Inc. Thermal management methods and apparatus for lighting devices
US7198387B1 (en) * 2003-12-18 2007-04-03 B/E Aerospace, Inc. Light fixture for an LED-based aircraft lighting system
CN2690723Y (en) 2003-12-22 2005-04-06 西安立明电子科技有限责任公司 Lens type LED mine lamp head
US7172324B2 (en) * 2004-01-05 2007-02-06 Leotek Electronics Corporation Internally illuminated light panel with LED modules having light redirecting devices
US7045965B2 (en) * 2004-01-30 2006-05-16 1 Energy Solutions, Inc. LED light module and series connected light modules
US7175306B2 (en) * 2004-03-08 2007-02-13 Frank Pan LED illuminating module
US7625712B2 (en) * 2004-05-21 2009-12-01 Beckman Coulter, Inc. Method for a fully automated monoclonal antibody-based extended differential
DE102004026829B4 (en) * 2004-05-28 2008-06-19 Aes Aircraft Elektro/Elektronik System Gmbh Device and method for the surface emitting light
CN2731252Y (en) 2004-07-09 2005-10-05 张晓艳 Lighting tube structure for decoration lighting of car
US7766518B2 (en) * 2005-05-23 2010-08-03 Philips Solid-State Lighting Solutions, Inc. LED-based light-generating modules for socket engagement, and methods of assembling, installing and removing same
US7703951B2 (en) * 2005-05-23 2010-04-27 Philips Solid-State Lighting Solutions, Inc. Modular LED-based lighting fixtures having socket engagement features
US7307391B2 (en) * 2006-02-09 2007-12-11 Led Smart Inc. LED lighting system
US7766511B2 (en) * 2006-04-24 2010-08-03 Integrated Illumination Systems LED light fixture
US7722220B2 (en) * 2006-05-05 2010-05-25 Cree Led Lighting Solutions, Inc. Lighting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8262253B2 (en) * 2007-05-02 2012-09-11 Luminator Holding Lp Lighting method and system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10231308B2 (en) 2008-09-24 2019-03-12 Luminator Holding Lp Methods and systems for maintaining the illumination intensity of light emitting diodes
US9788382B2 (en) 2008-09-24 2017-10-10 Luminator Holding Lp Methods and systems for maintaining the illumination intensity of light emitting diodes
US20120069568A1 (en) * 2008-10-31 2012-03-22 Osram Gesellschaft Mit Beschraenkter Haftung Lighting module and corresponding method
US9565782B2 (en) 2013-02-15 2017-02-07 Ecosense Lighting Inc. Field replaceable power supply cartridge
EP2868962A1 (en) * 2013-11-04 2015-05-06 Luminator Holding, L.P. Lighting housing with led illumination insert
US9869450B2 (en) 2015-02-09 2018-01-16 Ecosense Lighting Inc. Lighting systems having a truncated parabolic- or hyperbolic-conical light reflector, or a total internal reflection lens; and having another light reflector
US9568665B2 (en) 2015-03-03 2017-02-14 Ecosense Lighting Inc. Lighting systems including lens modules for selectable light distribution
US9746159B1 (en) 2015-03-03 2017-08-29 Ecosense Lighting Inc. Lighting system having a sealing system
US9651227B2 (en) 2015-03-03 2017-05-16 Ecosense Lighting Inc. Low-profile lighting system having pivotable lighting enclosure
US9651216B2 (en) 2015-03-03 2017-05-16 Ecosense Lighting Inc. Lighting systems including asymmetric lens modules for selectable light distribution
USD785218S1 (en) 2015-07-06 2017-04-25 Ecosense Lighting Inc. LED luminaire having a mounting system
USD782093S1 (en) 2015-07-20 2017-03-21 Ecosense Lighting Inc. LED luminaire having a mounting system
USD782094S1 (en) 2015-07-20 2017-03-21 Ecosense Lighting Inc. LED luminaire having a mounting system
US9651232B1 (en) 2015-08-03 2017-05-16 Ecosense Lighting Inc. Lighting system having a mounting device

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WO2008137076A1 (en) 2008-11-13
US20110038149A1 (en) 2011-02-17
CN101730820B (en) 2012-12-05
CA2685906A1 (en) 2008-11-13
US8262253B2 (en) 2012-09-11
EP2153120A4 (en) 2014-12-10
EP2153120A1 (en) 2010-02-17
CN101730820A (en) 2010-06-09

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