EP1821030A1 - LED light unit - Google Patents

LED light unit Download PDF

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Publication number
EP1821030A1
EP1821030A1 EP07002908A EP07002908A EP1821030A1 EP 1821030 A1 EP1821030 A1 EP 1821030A1 EP 07002908 A EP07002908 A EP 07002908A EP 07002908 A EP07002908 A EP 07002908A EP 1821030 A1 EP1821030 A1 EP 1821030A1
Authority
EP
European Patent Office
Prior art keywords
led
light unit
unit
polymer material
light
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.)
Granted
Application number
EP07002908A
Other languages
German (de)
French (fr)
Other versions
EP1821030B1 (en
Inventor
Antonio Zancan
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.)
Idealedit Srl
Original Assignee
IDEALED Srl Unipersonale
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
Application filed by IDEALED Srl Unipersonale filed Critical IDEALED Srl Unipersonale
Publication of EP1821030A1 publication Critical patent/EP1821030A1/en
Application granted granted Critical
Publication of EP1821030B1 publication Critical patent/EP1821030B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21V29/763—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 the direction of the light emitting axis
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
    • 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
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/005—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips for several lighting devices in an end-to-end arrangement, i.e. light tracks
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/023—Power supplies in a casing
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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 finds application in the field of both indoor and outdoor artificial lighting and particularly relates to a highly watertight light emitting module.
  • LEDs are known in the art, which use as a light source one or more light emitting diodes, commonly known as LEDs.
  • a LED is an electronic module adapted to generate electromagnetic radiations of various wavelengths, and particularly also in the visible light spectrum.
  • the Italian Patent application VI2003A000011 discloses a light emitting module comprising all the features as defined in the preamble of claim 1.
  • this prior art module comprises a support structure for one or more LED sources embedded in a protection and cover element, made of a polymer material which is mounted to the metal structure by screw or snap fit means, with a gasket interposed therebetween. Light sources are powered by electric means.
  • a well-known drawback of this prior art solution is that the metal structure does not ensure optimal dissipation of the heat generated by LED sources.
  • the screw or snap fit does not ensure watertightness, thereby involving the risk that both power supply connections and LEDs may be irremediably damaged.
  • the object of this invention is to overcome the above drawbacks, by providing a light unit that is highly efficient and relatively cost-effective.
  • a particular object is to provide a light unit that allows dissipation of large amounts of heat.
  • Yet another object is to provide a highly watertight light unit, which can be used underwater with no risk of liquid ingress.
  • a LED unit as defined in claim 1, comprising at least one LED, a housing element for said at least one LED; a cover element mounted above said at least one LED, characterized in that said housing element is made of a first thermally conductive polymer material, said cover element and said at least one LED being integrally associated to said housing element to form a one-piece light unit.
  • the unit of the invention allows dissipation of large amounts of heat, while ensuring watertightness.
  • the housing element By making the housing element from polymer material, any oxidation problems will be avoided.
  • the invention in another aspect, relates to a LED lighting apparatus as defined in claim 12, which comprises at least one support plate for at least one light source designed to emit a light beam, and at least one lens associated to said light source, which is designed to change the conformation and optical path of said beam, characterized in that said light source comprises at least one LED source as claimed in one or more of the previous claims.
  • the lighting unit of the invention generally designated by numeral 1, will be particularly but not exclusively suitable for residential or industrial lighting.
  • FIGS. 1 and 2 it comprises a housing element 2 for three LED sources 4, preferably mounted on a support element 3.
  • the support element 3 may also be omitted, and the LEDs, with the electric contacts associated thereto, may also be directly embedded in the housing element 2.
  • the latter may be made from an electrically insulating material.
  • the support element 3 typically a metal plate, may have sockets for connection to the LEDs 4, which are typically microsoldered thereto, and tracks for series or parallel connection therebetween.
  • the LED sources may be provided in any number, without departure from the scope of the attached claims. These will preferably be of the high power type, for assuring optimal lighting.
  • a cover element 5, mounted over the LEDs 4, will be further provided.
  • the housing element 2 is made of a first thermally conductive polymer material, which may consist of a base plastic material with particles of highly thermally conductive materials, preferably but without limitation metal particles, dispersed therein.
  • This base plastic material may be selected from the group comprising polypropylene, polyamide, polysulfone or an elastomer, preferably EPDM.
  • the LEDs 4 and the cover element 5 are integrally associated to the housing element 2. Therefore, the LEDs are embedded in the cover element 5 and/or the housing element 2, to form a unitary, watertight unit 1, specially suitable for underwater use. Likewise, if the LEDs lie on the support element 3, the latter will be wholly embedded in the cover element 5 and/or the housing element 2. It will be understood that the LEDs 4 may be covered by a lens, itself embedded in the cover element 5, which is designed to change the optical path of the light beam emitted therefrom, without departure from the scope as defined by the annexed claims. This will avoid any lens fouling problem.
  • the cover element 5 may be made of a second optically transparent polymer material, preferably a silicone resin, a polyamide, a polycarbonate or PMMA, which may be chemically compatible with the first polymer material that forms the housing element 2.
  • the second material will be chemically bonded to the first material, thereby providing a substantially watertight coupling, which will make the light unit of the invention specially suitable for underwater use.
  • the housing element 2 may comprise a substantially flat main body 6 having a seat 7 for the support element 3 with the LEDs 4 associated thereto and a plurality of outwardly extending heat-dissipating fins 8, as clearly shown in FIG. 3.
  • the fins 8 shall be appropriately sized and configured according to the power of the LEDs used, hence of the heat to be dissipated, especially when high power LEDs are used.
  • the cover element 5 may be housed within the whole seat 7 to cover and incorporate the support 3 and the LEDs 4, as shown in FIG. 1
  • the light unit of the invention may comprise power supply means 9 for powering the LEDs 4, to be connected to a normal power supply mains.
  • the power supply means 9 may have wiping contacts 10, as shown in FIGS. 1 and 2, known as IP55, for domestic use, or bayonet locking contacts, as shown in FIG. 3, known as IP68, for underwater use. It shall be understood that any other type of power supply means may be used without departure from the scope of the annexed claims.
  • the power supply means 9 may include voltage transformer means, not shown but well known per se, which are incorporated in the housing element 2.
  • the invention relates to a LED lighting apparatus, comprising a support plate 12 for the unit 1 and for a sheet 13 which in turn supports three lenses 14 coincident with the LEDs 4 for changing the shape and the optical path of the light beam emitted therefrom.
  • the apparatus may have modular interconnection means 15 for coupling two or more units 1.
  • the means 15 are a pair of complementary U-shaped plates 16, 16', which are adapted to connect two plates 12, 12' for supporting two units 1, 1' with their respective sheets 13, 13' and lenses 14 and 14'.
  • the units that form the assembly may be provided in any number, and that such units may be assembled in any configuration without departure from the scope as defined in the annexed claims.
  • a single plate 12 may be even provided, for supporting a plurality of units 1, one next to or above the other.
  • the lenses 14 are associated to the unit 1 through suitable adjustment means 17.
  • the adjustment means 17 may comprise pivot means 18 adapted to selectively change the tilt angle ⁇ of the lenses 14 relative to the plate 12.
  • the pivot means 18 include a pair of pins 19 insertable in corresponding elongated holes 20 of the plate 12 for pivoting the unit 1, as well as the plate 13 and the lenses 14 to which it is rigidly connected, about the axis X, in the direction of arrows F 1 and F 2 .
  • the adjustment means 17 may further comprise spacer means 21 for selectively adjusting the distance d of the lenses 14 from the unit 1.
  • the spacer means 21 may comprise a pair of teeth 22, 22' formed on the unit 1, insertable in a pair of locknuts 23, 23' formed on elongate extensions 24, 24' of the sheet 13, for radial displacement of the lenses 14 relative to the unit 1, in the direction of arrow F 3 and adjust the relative distance from d' to d".
  • the light beam emitted from the LEDs may be conformed and modeled as desired.
  • the plate 12 may be made of a plastic material and be subjected to a suitable conductive treatment next to the electric contacts 9 of the unit, e.g. by providing a nickel-plated surface portion, so that no exposed wire is required.
  • a mains voltage transformer may be further embedded in the plate 12.
  • the unit and apparatus of the invention fulfill the intended objects and particularly meet the requirement of allowing dissipation of large amounts of heat, while ensuring safe watertightness.
  • the housing element 2 By forming the housing element 2 from a thermally conductive polymer material, the large amounts of heat generated by the LEDs may be effectively dissipated, and any deformation and/or mechanical failure of the whole unit may be avoided.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A LED light unit, comprising at least one LED (4), a housing element (2) for the LED (4) and a cover element (5) mounted over the LED (4).
The housing element (2) is made of a first thermally conductive polymer material. The LED (4) and the cover element (5) are also integrally associated to the housing element (2) to form a unitary light unit therewith.

Description

    Field of the invention
  • The present invention finds application in the field of both indoor and outdoor artificial lighting and particularly relates to a highly watertight light emitting module.
    • Background of the invention
  • Many lighting devices are known in the art, which use as a light source one or more light emitting diodes, commonly known as LEDs. In general, a LED is an electronic module adapted to generate electromagnetic radiations of various wavelengths, and particularly also in the visible light spectrum.
  • The Italian Patent application VI2003A000011 discloses a light emitting module comprising all the features as defined in the preamble of claim 1. Particularly, this prior art module comprises a support structure for one or more LED sources embedded in a protection and cover element, made of a polymer material which is mounted to the metal structure by screw or snap fit means, with a gasket interposed therebetween. Light sources are powered by electric means.
  • A well-known drawback of this prior art solution is that the metal structure does not ensure optimal dissipation of the heat generated by LED sources.
  • Furthermore, the screw or snap fit does not ensure watertightness, thereby involving the risk that both power supply connections and LEDs may be irremediably damaged.
    • Summary of the invention
  • The object of this invention is to overcome the above drawbacks, by providing a light unit that is highly efficient and relatively cost-effective.
  • A particular object is to provide a light unit that allows dissipation of large amounts of heat.
  • Yet another object is to provide a highly watertight light unit, which can be used underwater with no risk of liquid ingress.
  • These and other objects, as better explained hereinafter, are fulfilled by a LED unit as defined in claim 1, comprising at least one LED, a housing element for said at least one LED; a cover element mounted above said at least one LED, characterized in that said housing element is made of a first thermally conductive polymer material, said cover element and said at least one LED being integrally associated to said housing element to form a one-piece light unit.
  • Thanks to this particular configuration, the unit of the invention allows dissipation of large amounts of heat, while ensuring watertightness.
  • By making the housing element from polymer material, any oxidation problems will be avoided.
  • In another aspect, the invention relates to a LED lighting apparatus as defined in claim 12, which comprises at least one support plate for at least one light source designed to emit a light beam, and at least one lens associated to said light source, which is designed to change the conformation and optical path of said beam, characterized in that said light source comprises at least one LED source as claimed in one or more of the previous claims.
    • Brief Description of the Drawings
  • Further features and advantages of the invention will be more apparent from the detailed description of a preferred, non-exclusive embodiment of a unit according to the invention, which is described as a non-limiting example with the help of the annexed drawings, in which:
    • FIG. 1 is a perspective view of a light unit according to the invention;
    • FIG. 2 is a sectional view of the light unit of Fig. 1, as taken along a plane II-II;
    • FIG. 3 is a bottom perspective view of the light unit of FIG. 1;
    • FIG. 4 is a perspective view of an assembled configuration of a lighting apparatus according to the invention;
    • FIG. 5 is an exploded view of a lighting apparatus according to the invention;
    • FIG. 6 is an enlarged view of certain details of FIG. 5;
    • FIG. 7 is a plan view of a lighting apparatus according to the invention in a first operating position;
    • FIG. 8 is a plan view of a lighting apparatus according to the invention in a second operating position.
    Detailed description of a preferred embodiment
  • Referring to the above figures, the lighting unit of the invention, generally designated by numeral 1, will be particularly but not exclusively suitable for residential or industrial lighting.
  • As shown in FIGS. 1 and 2, it comprises a housing element 2 for three LED sources 4, preferably mounted on a support element 3. It will be understood that the support element 3 may also be omitted, and the LEDs, with the electric contacts associated thereto, may also be directly embedded in the housing element 2. For this purpose, the latter may be made from an electrically insulating material.
  • In a known manner, the support element 3, typically a metal plate, may have sockets for connection to the LEDs 4, which are typically microsoldered thereto, and tracks for series or parallel connection therebetween.
  • It shall be understood that the LED sources may be provided in any number, without departure from the scope of the attached claims. These will preferably be of the high power type, for assuring optimal lighting.
  • A cover element 5, mounted over the LEDs 4, will be further provided.
  • In accordance with the invention, the housing element 2 is made of a first thermally conductive polymer material, which may consist of a base plastic material with particles of highly thermally conductive materials, preferably but without limitation metal particles, dispersed therein. This base plastic material may be selected from the group comprising polypropylene, polyamide, polysulfone or an elastomer, preferably EPDM.
  • According to the invention, the LEDs 4 and the cover element 5 are integrally associated to the housing element 2. Therefore, the LEDs are embedded in the cover element 5 and/or the housing element 2, to form a unitary, watertight unit 1, specially suitable for underwater use. Likewise, if the LEDs lie on the support element 3, the latter will be wholly embedded in the cover element 5 and/or the housing element 2. It will be understood that the LEDs 4 may be covered by a lens, itself embedded in the cover element 5, which is designed to change the optical path of the light beam emitted therefrom, without departure from the scope as defined by the annexed claims. This will avoid any lens fouling problem.
  • For this purpose, the cover element 5 may be made of a second optically transparent polymer material, preferably a silicone resin, a polyamide, a polycarbonate or PMMA, which may be chemically compatible with the first polymer material that forms the housing element 2. In this configuration of the invention, the second material will be chemically bonded to the first material, thereby providing a substantially watertight coupling, which will make the light unit of the invention specially suitable for underwater use.
  • Advantageously, the housing element 2 may comprise a substantially flat main body 6 having a seat 7 for the support element 3 with the LEDs 4 associated thereto and a plurality of outwardly extending heat-dissipating fins 8, as clearly shown in FIG. 3.
  • The fins 8 shall be appropriately sized and configured according to the power of the LEDs used, hence of the heat to be dissipated, especially when high power LEDs are used.
  • Suitably, the cover element 5 may be housed within the whole seat 7 to cover and incorporate the support 3 and the LEDs 4, as shown in FIG. 1
  • The light unit of the invention may comprise power supply means 9 for powering the LEDs 4, to be connected to a normal power supply mains.
  • Particularly, the power supply means 9 may have wiping contacts 10, as shown in FIGS. 1 and 2, known as IP55, for domestic use, or bayonet locking contacts, as shown in FIG. 3, known as IP68, for underwater use. It shall be understood that any other type of power supply means may be used without departure from the scope of the annexed claims.
  • Advantageously, the power supply means 9 may include voltage transformer means, not shown but well known per se, which are incorporated in the housing element 2.
  • In a further aspect, the invention relates to a LED lighting apparatus, comprising a support plate 12 for the unit 1 and for a sheet 13 which in turn supports three lenses 14 coincident with the LEDs 4 for changing the shape and the optical path of the light beam emitted therefrom.
  • As mentioned above concerning the LEDs, it will be understood that the lenses may be provided in any number, without departure from the scope of the attached claims.
  • The apparatus may have modular interconnection means 15 for coupling two or more units 1. In the embodiment of FIG. 4, the means 15 are a pair of complementary U-shaped plates 16, 16', which are adapted to connect two plates 12, 12' for supporting two units 1, 1' with their respective sheets 13, 13' and lenses 14 and 14'.
  • It will be understood that the units that form the assembly may be provided in any number, and that such units may be assembled in any configuration without departure from the scope as defined in the annexed claims. For instance, a single plate 12 may be even provided, for supporting a plurality of units 1, one next to or above the other.
  • Advantageously, the lenses 14 are associated to the unit 1 through suitable adjustment means 17.
  • As particularly shown in FIG. 6, the adjustment means 17 may comprise pivot means 18 adapted to selectively change the tilt angle α of the lenses 14 relative to the plate 12. In the illustrated embodiment, the pivot means 18 include a pair of pins 19 insertable in corresponding elongated holes 20 of the plate 12 for pivoting the unit 1, as well as the plate 13 and the lenses 14 to which it is rigidly connected, about the axis X, in the direction of arrows F1 and F2.
  • Furthermore, the adjustment means 17 may further comprise spacer means 21 for selectively adjusting the distance d of the lenses 14 from the unit 1.
  • As shown in FIGS. 7 and 8, the spacer means 21 may comprise a pair of teeth 22, 22' formed on the unit 1, insertable in a pair of locknuts 23, 23' formed on elongate extensions 24, 24' of the sheet 13, for radial displacement of the lenses 14 relative to the unit 1, in the direction of arrow F3 and adjust the relative distance from d' to d". By this arrangement, the light beam emitted from the LEDs may be conformed and modeled as desired.
  • The plate 12 may be made of a plastic material and be subjected to a suitable conductive treatment next to the electric contacts 9 of the unit, e.g. by providing a nickel-plated surface portion, so that no exposed wire is required. A mains voltage transformer may be further embedded in the plate 12.
  • In view of the foregoing, it clearly appears that the unit and apparatus of the invention fulfill the intended objects and particularly meet the requirement of allowing dissipation of large amounts of heat, while ensuring safe watertightness.
  • By forming the housing element 2 from a thermally conductive polymer material, the large amounts of heat generated by the LEDs may be effectively dissipated, and any deformation and/or mechanical failure of the whole unit may be avoided.
  • The unit of this invention is susceptible of a number of changes and variants, within the inventive principle disclosed in the appended claims. All the details thereof may be replaced by other technically equivalent parts, and the materials may vary depending on different needs, without departure from the scope of the invention.
  • While the unit has been described with particular reference to the accompanying figures, the numerals referred to in the disclosure and claims are only used for the sake of a better intelligibility of the invention and shall not be intended to limit the claimed scope in any manner.

Claims (19)

  1. A LED unit, comprising:
    - at least one LED (4),
    - a housing element (2) for said at least one LED (4),
    - a cover element (5) mounted above said at least one LED (4),
    characterized in that said housing element (2) is made of a first thermally conductive polymer material, said at least one LED (4) and said cover element (5) being integrally associated to said housing element (2) to form a unitary, watertight light unit.
  2. A light unit as claimed in claim 1, characterized in that said first thermally conductive polymeric material is an electrical insulator.
  3. A light unit as claimed in claim 1, characterized in that said cover element (5) is made of a second polymer material.
  4. A light unit as claimed in claim 3, characterized in that said second polymer material is optically transparent.
  5. A light unit as claimed in claim 3, characterized in that said second polymer material is selected from the group comprising silicone resins, polyamides, polycarbonate, PMMA.
  6. A light unit as claimed in claim 3, characterized in that said first polymer material is chemically compatible with said second polymer material.
  7. A light unit as claimed in claim 1, characterized in that said first thermally conductive polymer material comprises a base plastic material with particles of highly thermally conductive materials dispersed therein.
  8. A light unit as claimed in claim 7, characterized in that said base plastic material is selected from the group comprising polypropylene, polyamide, polysulfone, elastomers.
  9. A light unit as claimed in claim 7, characterized in that said highly thermally conductive particles are metal materials.
  10. A light unit as claimed in claim 1, characterized in that it comprises a support element (3) for said at least one LED (4).
  11. A light unit as claimed in claim 1, characterized in that said housing element (2) comprises a substantially planar main body (6) having a seat 7 for housing said at least one LED (4) and a plurality of heat-dissipating fins (8), outwardly extending from said body (6).
  12. A light unit as claimed in claim 11, characterized in that said cover element (5) is mounted over the whole of said cavity (7) to cover and incorporate said at least one LED (4).
  13. A light unit as claimed in claim 1, characterized in that it comprises power supply means (9) for powering said at least one LED (4), to be connected to an external power supply mains.
  14. A light unit as claimed in claim 13, characterized in that said power supply means (9) include voltage transformer means incorporated in said housing element (2).
  15. A LED lighting apparatus comprising at least one support plate (12) for at least one light source designed to emit a light beam, and at least one lens (14) associated to said light source, which is designed to change the conformation and optical path of said beam, characterized in that said light source comprises at least one LED source (1) as claimed in one or more of the preceding claims.
  16. An apparatus as claimed in claim 15, characterized in that said at least one lens (14) is associated to said LED unit (1) though suitable adjustment means (17).
  17. An apparatus as claimed in claim 15, characterized in that said adjustment means (17) comprise pivot means (18) adapted to selectively change the tilt angle (α) of said at least one lens (14) relative to said plate (12).
  18. An apparatus as claimed in claim 15, characterized in that said adjustment means (17) comprise spacer means (21) for selectively adjusting the distance of said at least one lens (14) from said LED unit (1).
  19. An apparatus as claimed in claim 15, characterized in that said at least one lens (14) comprises a plurality of lenses associated to respective LEDs (4) of said LED unit (1).
EP07002908A 2006-02-15 2007-02-12 LED light unit Not-in-force EP1821030B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SM200600005A SM200600005B (en) 2006-02-15 2006-02-15 High power LED light unit, as well as lighting apparatus comprising this unit

Publications (2)

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EP1821030A1 true EP1821030A1 (en) 2007-08-22
EP1821030B1 EP1821030B1 (en) 2012-04-18

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EP (1) EP1821030B1 (en)
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SM (1) SM200600005B (en)

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WO2009145892A1 (en) 2008-05-27 2009-12-03 Ruud Lighting, Inc. Method for led-module assembly
WO2009146599A1 (en) * 2008-06-06 2009-12-10 Chen Jiaqiang Divided led lamp
WO2009155769A1 (en) * 2008-06-25 2009-12-30 深圳市方大国科光电技术有限公司 A heat-dissipating fluorescent lamp
CN101771027A (en) * 2009-01-06 2010-07-07 奥斯兰姆有限公司 High-power LED module assembly and manufacturing method thereof
EP2241802A1 (en) * 2009-04-14 2010-10-20 Zumtobel Lighting GmbH Wet room lamp
EP2317205A1 (en) * 2009-10-27 2011-05-04 Liang Meng Plastic Share Co. Ltd. Housing of LED light source comprising electrical connector
EP2317206A1 (en) * 2009-10-27 2011-05-04 Liang Meng Plastic Share Co. Ltd. Illuminating device and method for manufacturing the same
US20120188756A1 (en) * 2009-05-27 2012-07-26 Jameson Llc Portable led tube light
CN101672464B (en) * 2008-09-08 2012-10-10 富准精密工业(深圳)有限公司 LED lamp
ES2398836A1 (en) * 2010-05-26 2013-03-22 Javier CUTANDA GARCÍA Universal lamp. (Machine-translation by Google Translate, not legally binding)
CN102042505B (en) * 2009-10-13 2013-04-10 良盟塑胶股份有限公司 Illuminating device and manufacturing method thereof
FR2981432A1 (en) * 2011-10-14 2013-04-19 Ayrton Lighting device for e.g. musical entertainment, has linear projector adapted to rotate with respect to frame around axis, and control unit for regulating luminosity of light source and position of projector with respect to frame
CN102042571B (en) * 2009-10-13 2013-06-05 良盟塑胶股份有限公司 Conductive coating structure for lighting device
EP2650610A2 (en) 2012-04-13 2013-10-16 Hella KGaA Hueck & Co Sealed LED light module
WO2014019953A1 (en) 2012-08-01 2014-02-06 Hella Kgaa Hueck & Co. Sealed led light module
US8877851B2 (en) 2012-05-02 2014-11-04 E I Du Pont De Nemours And Company Graphite filled polyester compositions
EP3070396A1 (en) * 2015-03-13 2016-09-21 Hella KGaA Hueck & Co. Light module
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WO2018158325A1 (en) * 2017-03-01 2018-09-07 Zumtobel Lighting Gmbh Lamp having rotatably mounted light head
FR3071586A1 (en) * 2017-09-22 2019-03-29 Nlx FIELD LIGHTING DEVICE AND CORRESPONDING LIGHTING RAMP
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WO2009124937A1 (en) * 2008-04-08 2009-10-15 Led Go Srl Lighting device and relative method of production
EP2294620A4 (en) * 2008-05-27 2012-02-01 Ruud Lighting Inc Method for led-module assembly
EP2294620A1 (en) * 2008-05-27 2011-03-16 Ruud Lighting, Inc. Method for led-module assembly
WO2009145892A1 (en) 2008-05-27 2009-12-03 Ruud Lighting, Inc. Method for led-module assembly
WO2009146599A1 (en) * 2008-06-06 2009-12-10 Chen Jiaqiang Divided led lamp
WO2009155769A1 (en) * 2008-06-25 2009-12-30 深圳市方大国科光电技术有限公司 A heat-dissipating fluorescent lamp
CN101672464B (en) * 2008-09-08 2012-10-10 富准精密工业(深圳)有限公司 LED lamp
CN101771027A (en) * 2009-01-06 2010-07-07 奥斯兰姆有限公司 High-power LED module assembly and manufacturing method thereof
CN101771027B (en) * 2009-01-06 2015-05-06 奥斯兰姆有限公司 High-power LED module assembly and manufacturing method thereof
EP2241802A1 (en) * 2009-04-14 2010-10-20 Zumtobel Lighting GmbH Wet room lamp
US20120188756A1 (en) * 2009-05-27 2012-07-26 Jameson Llc Portable led tube light
CN102042505B (en) * 2009-10-13 2013-04-10 良盟塑胶股份有限公司 Illuminating device and manufacturing method thereof
CN102042571B (en) * 2009-10-13 2013-06-05 良盟塑胶股份有限公司 Conductive coating structure for lighting device
EP2317206A1 (en) * 2009-10-27 2011-05-04 Liang Meng Plastic Share Co. Ltd. Illuminating device and method for manufacturing the same
EP2317205A1 (en) * 2009-10-27 2011-05-04 Liang Meng Plastic Share Co. Ltd. Housing of LED light source comprising electrical connector
ES2398836A1 (en) * 2010-05-26 2013-03-22 Javier CUTANDA GARCÍA Universal lamp. (Machine-translation by Google Translate, not legally binding)
FR2981432A1 (en) * 2011-10-14 2013-04-19 Ayrton Lighting device for e.g. musical entertainment, has linear projector adapted to rotate with respect to frame around axis, and control unit for regulating luminosity of light source and position of projector with respect to frame
EP2650610A2 (en) 2012-04-13 2013-10-16 Hella KGaA Hueck & Co Sealed LED light module
US8877851B2 (en) 2012-05-02 2014-11-04 E I Du Pont De Nemours And Company Graphite filled polyester compositions
WO2014019953A1 (en) 2012-08-01 2014-02-06 Hella Kgaa Hueck & Co. Sealed led light module
EP3070396A1 (en) * 2015-03-13 2016-09-21 Hella KGaA Hueck & Co. Light module
WO2016146408A1 (en) * 2015-03-13 2016-09-22 Hella Kgaa Hueck & Co. Light module
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EP3081855A1 (en) * 2015-04-13 2016-10-19 JB-Lighting Lichtanlagentechnik GmbH Spotlight
GB2544961A (en) * 2015-10-07 2017-06-07 Magiled (Uk) Ltd Luminaire housing and luminaire
WO2017111714A1 (en) * 2015-12-23 2017-06-29 LIERDE Jan Herman Ida Elizabeth VAN Lighting fixture
WO2018148695A1 (en) * 2017-02-12 2018-08-16 Deepsea Power & Light Llc Underwater lights with port windows including lens features for providing tailored output beams
US10627076B2 (en) 2017-02-12 2020-04-21 SeeScan, Inc. Underwater lights with port windows including lens features for providing tailored output beams
US11815257B1 (en) 2017-02-12 2023-11-14 SeeScan, Inc. Underwater lights with port windows including lens features for providing tailored output beams
WO2018158325A1 (en) * 2017-03-01 2018-09-07 Zumtobel Lighting Gmbh Lamp having rotatably mounted light head
FR3071586A1 (en) * 2017-09-22 2019-03-29 Nlx FIELD LIGHTING DEVICE AND CORRESPONDING LIGHTING RAMP
US20200088397A1 (en) * 2018-09-18 2020-03-19 Hyundai Motor Company Light weight radiant heat structure of thermoelectric polymer heat sink and manufacturing method of the same
CN110906294A (en) * 2018-09-18 2020-03-24 现代自动车株式会社 Heat-conducting polymer radiator with light heat-radiating structure and manufacturing method thereof
EP3627046A1 (en) * 2018-09-18 2020-03-25 Hyundai Motor Company Light weight radiant heat structure of thermoelectric polymer heat sink and manufacturing method of the same
JP2020047570A (en) * 2018-09-18 2020-03-26 現代自動車株式会社Ｈｙｕｎｄａｉ Ｍｏｔｏｒ Ｃｏｍｐａｎｙ Light-weight heat radiation structure and manufacturing method of heat-conductive polymer heat sink
US11015795B2 (en) 2018-09-18 2021-05-25 Hyundai Motor Company & Kia Motors Corporation Light weight radiant heat structure of thermoelectric polymer heat sink and manufacturing method of the same

Also Published As

Publication number Publication date
SM200600005A (en) 2007-08-22
ATE554335T1 (en) 2012-05-15
ES2386153T3 (en) 2012-08-10
EP1821030B1 (en) 2012-04-18
SM200600005B (en) 2007-08-22

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