WO2006094346A1 - Led lighting apparatus in a plastic housing - Google Patents

Led lighting apparatus in a plastic housing Download PDF

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Publication number
WO2006094346A1
WO2006094346A1 PCT/AU2006/000300 AU2006000300W WO2006094346A1 WO 2006094346 A1 WO2006094346 A1 WO 2006094346A1 AU 2006000300 W AU2006000300 W AU 2006000300W WO 2006094346 A1 WO2006094346 A1 WO 2006094346A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
lighting apparatus
led
translucent window
sealing cap
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.)
Ceased
Application number
PCT/AU2006/000300
Other languages
English (en)
French (fr)
Inventor
Grant Harold Amor
Carl Denis Amor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AU2005901081A external-priority patent/AU2005901081A0/en
Application filed by Individual filed Critical Individual
Priority to AU2006222562A priority Critical patent/AU2006222562B2/en
Priority to AT06704973T priority patent/ATE439548T1/de
Priority to DE602006008440T priority patent/DE602006008440D1/de
Priority to HK08107957.8A priority patent/HK1117586B/xx
Priority to US11/885,771 priority patent/US7722216B2/en
Priority to CN2006800075938A priority patent/CN101137866B/zh
Priority to EP06704973A priority patent/EP1861652B1/en
Publication of WO2006094346A1 publication Critical patent/WO2006094346A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling 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
    • F21V29/767—Cooling 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 the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B45/00—Arrangements or adaptations of signalling or lighting devices
    • B63B45/02—Arrangements or adaptations of signalling or lighting devices the devices being intended to illuminate the way ahead or other areas of environments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/48—Means for searching for underwater objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/20—Use or application of lighting devices on or in particular types of vehicles for water vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
    • F21W2111/023—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like for pedestrian walkways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/401—Lighting for industrial, commercial, recreational or military use for swimming pools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting apparatus and to a light fitting which forms part of the lighting apparatus.
  • the present invention has particular, although not exclusive application to lighting arrangements to be fitted in exposed environments, such as moist or underwater environments or areas of high traffic, such as walkways.
  • many underwater or other mounted lights have a metal housing of a bronze or stainless steel material, to which a glass window assembly is fitted.
  • the glass window assembly typically includes a window holder, a glass window and a seal mounted there-between so as to impede water from entering the metal housing.
  • the window assembly is relatively complicated in its construction and can be prone to leakage when the seal wears out.
  • the housing is electrically conductive it can cause galvanic corrosion of itself or a mounting plate or wall if such components are also of metal.
  • a lighting apparatus including: a housing of a plastic material, the housing defining a translucent window; and a light emitting diode (LED) assembly located within the housing to emit light through the translucent window.
  • LED light emitting diode
  • the window is integral with the housing. Thus, there is no need for a sealing arrangement to be provided for the housing.
  • the housing may be of a thermoplastic material.
  • the housing may be of a polycarbonate material. Applicant has found polycarbonate particularly suitable since it has high strength, especially high impact strength.
  • the housing may include a cylindrical barrel defining an external thread.
  • the housing may define a flanged head at an end of the barrel.
  • the flanged head may define the translucent window.
  • the housing may be injection molded.
  • the lighting apparatus may further include a mounting nut for engaging with the thread so that a wall can be compressed between the head and the nut to mount the housing on the wall.
  • the lighting apparatus may further include a sealing cap for sealing the LED assembly within the housing.
  • the sealing cap may include a pair of posts which engage with a pair of slots defined in the barrel so as to form a bayonet fitting.
  • the sealing cap may also be of polycarbonate material.
  • the sealing cap may define a circumferential, external recess in which an O-ring may be fitted.
  • the sealing cap may also define an aperture in which an electrical connector can be mounted.
  • the LED assembly may include: at (east one LED; a printed circuit board (PCB) to which the at least one LED is electrically coupled; and a heat sink located adjacent the PCB to which the at least one LED is thermally coupled.
  • PCB printed circuit board
  • the LED assembly may further include a guard defining at least one chamber for each receiving a respective LED.
  • the heat sink may be machined from a solid aluminium bar and may be anodized.
  • the heat sink may define a central bore through which electrical wires can extend.
  • the LED assembly may further include a buck transformer to provide power to the at least one LED.
  • the window may include a lens for focusing light from the at least one LED.
  • a light fitting including: a housing of a plastic material, the housing defining a translucent window and being shaped so that a light emitting diode (LED) assembly can be located in the housing to emit light through the translucent window.
  • LED light emitting diode
  • a lighting apparatus including: a housing of a plastic material, the housing defining a translucent window; and a light emitting diode (LED) assembly located within the housing to emit light through the translucent window, wherein the plastic material is a thermoplastic material.
  • LED light emitting diode
  • a lighting apparatus including: a housing of a plastic material, the housing defining a translucent window; and a light emitting diode (LED) assembly located within the housing to emit light through the translucent window, wherein the plastic material is selected to have a heat transfer coefficient sufficient to conduct heat from a heat sink of the LED assembly.
  • LED light emitting diode
  • Figure 1 is an upper perspective view of a lighting apparatus in accordance with a first embodiment of the present invention.
  • Figure 2 is a lower perspective view of the lighting apparatus of Figure 1.
  • Figure 3 is a partially cut-away upper perspective view of the lighting apparatus of Figure 1.
  • Figure 4 is a side sectional view of the lighting apparatus of Figure 1.
  • a lighting apparatus 2 as shown in Figures 1 and 2.
  • the lighting apparatus 2 includes a thermoplastic housing 4 having a flanged head 10, and a cylindrical barrel 8 extending from the flanged head 10.
  • the flanged head 10 defines a translucent window 12 and, in use, a light emitting diode (LED) assembly 3 is located within the thermoplastic housing 4 so as to emit light through the translucent window.
  • the lighting apparatus 2 includes a sealing cap 6 for sealing the LED assembly 3 within the thermoplastic housing to thereby isolate the LED assembly 3 from an external environment, such as water, in use. Both the housing and the sealing cap are injection molded from the thermoplastic material.
  • the thermoplastic material is polycarbonate in this example of the invention. As is known, polycarbonate is resistant to corrosion and electricity conduction. A detailed description of the lighting apparatus 2 is provided below.
  • the housing 4 is a one-piece integrated structure. As will be seen below, this results in a structure which does not require a separate sealing arrangement for a window or lens, as is required with presently available lighting apparatus.
  • the cylindrical barrel 8 of the housing 4 defines an external thread 9 which can engage a mounting nut 16 when mounting the lighting apparatus 2 to a hull 14 of a boat.
  • the hull 14 defines an aperture through which the barrel 8 can be passed.
  • the nut 16 is engaged with the barrel 8 so that the hull 14 is compressed between the head 10 and the nut 16.
  • a mounting washer 18 is typically provided between the hull 14 and the nut 16.
  • a marine grade sealant is typically provided between the underside of the head 10 and the outside of the hull 14 to impede water from breaching the hull 14.
  • a bayonet fitting 20 is used to engage the sealing cap 6 with the housing 4.
  • the bayonet fitting 20 includes a pair of opposed posts 22 which extend from the sealing cap 6, and a pair of opposed elbow slots 24 defined at the tail of the barrel 8 and for each receiving a respective post 22.
  • the sealing cap 6 further defines a pair of wings 26 to facilitate hand engagement and disengagement of the sealing cap 6 with the housing 4.
  • the sealing cap 6 also defines an aperture in which an electrical connector 28 can be mounted.
  • the sealing cap 6 defines a recess in which a rubber O-ring 30 may be fitted to impede water from entering the lighting apparatus 2. In this manner, the LED assembly 3 located in the housing 2 remains dry.
  • the LED assembly 3 includes a pair of light emitting diodes (LEDs) 32 which are electrically coupled to a printed circuit board (PCB) 34.
  • An aluminium heat sink 36 is located adjacent the PCB 34 and is thermally coupled to the LED's
  • the heat sink 34 is machined from a solid aluminium bar, and may be anodized or coated electrolytically with a protective oxide.
  • the heat sink 36 defines a plurality of fins 29 which each contact an inner surface of the barrel 8. In use, heat generated by the LED's 32 is thermally coupled to the heat sink
  • thermoplastic housing 4 before being dissipated in the surrounding air, hull 14 and water.
  • the thermoplastic material is thus selected to facilitate heat dissipation from the heat sink 36. Applicant has found that polycarbonate is well-suited to the task of such heat dissipation.
  • the LED assembly 3 further includes a guard 38 or holder which defines a pair of chambers for each receiving a respective LED 32.
  • the guard 38 is typically affixed to the PCB 34.
  • the sealing cap 6 is sized so that the LED assembly is held in compression between the flanged head 10 and the sealing cap 6.
  • the sealing cap 6 further defines a cavity in which a buck transformer 40 is located.
  • the buck transformer 40 is mounted and electrically coupled to the electrical connector 28 as shown in Figure 4. Electrical wires (not shown) can be interconnected between the buck transformer 40 and the PCB 34 to provide power to the LED's 32, and extend along a central bore 42 defined by the heat sink 36.
  • the buck transformer 40 typically provides between 5 and 32 volts to the LED's 32 and can be configured to supply voltage and current to the LED's 32 in accordance with the particular application.
  • the electrical connector 28 includes an enlarged base from which a threaded shaft 44 extends.
  • the threaded shaft 44 extends through the aperture defined in the sealing cap 6 and engages with a mounting nut 46.
  • An O-ring 48 can encircle the shaft 44 and be compressed between the enlarged base and the sealing cap 6 so as to impede water from entering the lighting apparatus 2.
  • the watertight seals between the sealing cap 6 and the housing 4, and between the cap 6 and the connector 28 are each 1P68 rated.
  • a user can quickly remove the cap 6 from the housing 4 when replacing LED's in the event of failure, without the need to raise the hull 14 from the water.
  • the preferred embodiment was directed to an underwater lighting apparatus 2 for fitting to the hull 14 of a boat.
  • the lighting apparatus would be also suitable for other applications such as lighting which is embedded in pavements or swimming pool walls.
  • Another suitable application for the lighting apparatus would be as up lights for decorative or security purposes.
  • Polycarbonate has high impact strength.
  • the lighting apparatus would be suitable for applications where light would usually be destroyed by vandals or the environment.
  • access to the housing can be designed to be in a secure area, while the translucent window is exposed to said vandals or the environment.
  • the combination of the LED's 32 and the one-piece housing 4 allows the lighting apparatus 2 to be used out of water. Thus, it is not necessary for the lighting apparatus 2 to be switched off when the boat is planing, for example.
  • Applicant has found that the relatively low temperature of the LED's and the use of a one-piece housing remove the possibility of any seals being damaged by heat generated by the light source and consequently leaking.
  • Applicant can achieve a light source of high intensity without damaging the housing 4 in an out of water environment, such as those described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
PCT/AU2006/000300 2005-03-08 2006-03-08 Led lighting apparatus in a plastic housing Ceased WO2006094346A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2006222562A AU2006222562B2 (en) 2005-03-08 2006-03-08 LED lighting apparatus in a plastic housing
AT06704973T ATE439548T1 (de) 2005-03-08 2006-03-08 Led-beleuchtungsgerät in einem kunststoffgehäuse
DE602006008440T DE602006008440D1 (https=) 2005-03-08 2006-03-08
HK08107957.8A HK1117586B (en) 2005-03-08 2006-03-08 Led lighting apparatus in a plastic housing
US11/885,771 US7722216B2 (en) 2005-03-08 2006-03-08 LED lighting apparatus in a plastic housing
CN2006800075938A CN101137866B (zh) 2005-03-08 2006-03-08 在塑性外壳中的led照明装置
EP06704973A EP1861652B1 (en) 2005-03-08 2006-03-08 Led lighting apparatus in a plastic housing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2005901081A AU2005901081A0 (en) 2005-03-08 Aqualuma
AU2005901081 2005-03-08

Publications (1)

Publication Number Publication Date
WO2006094346A1 true WO2006094346A1 (en) 2006-09-14

Family

ID=36952868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2006/000300 Ceased WO2006094346A1 (en) 2005-03-08 2006-03-08 Led lighting apparatus in a plastic housing

Country Status (8)

Country Link
US (1) US7722216B2 (https=)
EP (1) EP1861652B1 (https=)
CN (1) CN101137866B (https=)
AT (1) ATE439548T1 (https=)
DE (1) DE602006008440D1 (https=)
ES (1) ES2331750T3 (https=)
NZ (1) NZ561589A (https=)
WO (1) WO2006094346A1 (https=)

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EP2175191A1 (en) * 2008-10-07 2010-04-14 Ceramate Technical Co., Ltd Combinational inset lamp exempt from a shielding cylinder
EP2211085A1 (en) * 2009-01-26 2010-07-28 Lighting Science Group Corporation Light fixture and associated LED board and monolithic optic
WO2010102594A1 (de) * 2009-03-11 2010-09-16 Joachim Springer Unterwasserscheinwerfer
FR2943761A1 (fr) * 2009-03-31 2010-10-01 Mafelec Source lumineuse a diodes electroluminescentes en particulier pour dispositif de signalisation lumineuse et dispositif equipe d'une telle source lumineuse
WO2011098463A1 (en) 2010-02-11 2011-08-18 Dsm Ip Assets B.V. Led lighting device
DE202011051987U1 (de) 2011-11-16 2013-02-20 Alanod Aluminium-Veredlung Gmbh & Co. Kg Trägerstruktur für elektronische Bauelemente, wie lichtemittierende Dioden, und Basismaterial zur Herstellung einer Basisplatte für eine solche Struktur
WO2014122270A1 (de) * 2013-02-08 2014-08-14 Zumtobel Lighting Gmbh Fasssadenleuchte
WO2014128514A1 (en) * 2013-02-25 2014-08-28 Zagoras Ioannis-Petros Underwater light (led) of fixed tilt angle 0°-80° degrees for multiple applications with optional gyro sensor
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HK1117586A1 (en) 2009-01-16
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CN101137866A (zh) 2008-03-05
EP1861652A1 (en) 2007-12-05
NZ561589A (en) 2009-12-24
DE602006008440D1 (https=) 2009-09-24
US7722216B2 (en) 2010-05-25
EP1861652A4 (en) 2008-05-14
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ATE439548T1 (de) 2009-08-15
US20080165547A1 (en) 2008-07-10

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