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WO2012114225A2 - Ensemble lampe - Google Patents

Ensemble lampe Download PDF

Info

Publication number
WO2012114225A2
WO2012114225A2 PCT/IB2012/050636 IB2012050636W WO2012114225A2 WO 2012114225 A2 WO2012114225 A2 WO 2012114225A2 IB 2012050636 W IB2012050636 W IB 2012050636W WO 2012114225 A2 WO2012114225 A2 WO 2012114225A2
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
housing
lamp assembly
lamp
assembly according
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/IB2012/050636
Other languages
English (en)
Other versions
WO2012114225A3 (fr
Inventor
Marco Joannes VAN DEN BOSCH
Vincent Stefan David Gielen
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of WO2012114225A2 publication Critical patent/WO2012114225A2/fr
Publication of WO2012114225A3 publication Critical patent/WO2012114225A3/fr
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
    • F21V29/85—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
    • 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
    • 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
    • F21K9/20—Light sources comprising attachment means
    • 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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • 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 in general to a lamp assembly, comprising a housing, one or more LEDs mounted in the housing, and coupling terminals for electrically coupling the lamp assembly with a lamp socket.
  • lamps is a word that can have several meanings.
  • the word “lamp” will be used to indicate the replaceable element that is to be mounted in a lamp socket.
  • a conventional example of a lamp in this sense, suitable for general lighting purposes and powered from mains, is an incandescent lamp, typically including a pear-shaped glass bulb with a glowing wire within a confined atmosphere of suitable composition.
  • the lamp atmosphere contains a halogen, and the size of the bulb has decreased.
  • the small bulb is mounted in a cone- shaped reflector housing with a transparant plate, typically glass or quartz, covering the bulb.
  • the unit may be indicated as "light-generating unit”, containing a bulb as “light-generating element”, but within the bulb the actual light-generating element is the glowing wire. In discharge lamps, no such element can be indicated: the light is generated by a plasma inside the bulb.
  • the light-generating element is constituted by one or more LEDs, which is/are mounted, together with driving electronics, within a lamp housing that is equipped with electrical coupling terminals.
  • This combination will in the context of the present invention be indicated as "lamp assembly”.
  • the assembly is shaped in conformity with the shape of for instance a halogen lamp, so that it is possible to exchange a halogen lamp with such lamp assembly, or in any case the electrical coupling terminals are designed to fit in existing lamp sockets.
  • the lamp assembly as a whole is a replaceable product, to be discarded when broken; for consumers, such product is also indicated as "LED lamp”.
  • the lamp assembly comprises a plurality of components, as is illustrated by figures 1A-C, which show a schematic cross-section along a first longitudinal plane (Fig.lA), a schematic cross-section along a second longitudinal plane (Fig. IB), and an exploded view (Fig.lC) of a lamp assembly 1.
  • Fig.lA first longitudinal plane
  • Fig. IB schematic cross-section along a second longitudinal plane
  • Fig.lC exploded view of a lamp assembly 1.
  • the shape of this lamp assembly corresponds to the well-known MR- 16 design for halogen lamps, for which LED replacements are commercially available, but it should be clear that the invention is not limited to this shape.
  • the assembly 1 comprises a semi-spherical body 3, with an insulating base 2 carrying electrical terminals 12 which project out of the base.
  • the body 3 has a hollow interior, at the open end of which a transparent window 5 is fitted, for instance made of glass, plastic or quartz, and typically having lens-shaped portions at its inner surface.
  • a transparent window 5 is fitted, for instance made of glass, plastic or quartz, and typically having lens-shaped portions at its inner surface.
  • the transverse dimension at the base 2 is smaller than the transverse dimension at the window 5, which typically is circular.
  • the combination of body 3 and base 2 will also be indicated as housing 10.
  • the assembly 1 is shown with the base 2 down and the window 5 up. Behind the window 5 (i.e. below the window in the orientation of figure 1), the assembly 1 comprises a carrier plate 6 carrying the at least one LED 6a plus other electronic components 6b; this plate will be indicated as LED carrier plate 6, and is typically
  • the assembly 1 comprises a second carrier plate 8 carrying electronic components of an electronic lamp driver; this plate will be indicated as driver carrier plate 8.
  • the terminals 12 are electrically connected to respective inputs of the electronic lamp driver. Electrical connections between an output of the electronic lamp driver and the LED carrier plate 6 are not visible in these views.
  • the body 3 is designed to perform many functions. An important aspect of the body 3 is that it serves as a heat sink to remove the heat generated by the driver and the LEDs.
  • the body 3 has a general H-shape with a central plane 3 a, upper side wall 3b and lower side wall 3c.
  • the figures show that the LED carrier plate 6 is mounted on the central plane 3 a of the body 3. Heat generated in the LED unit is transferred to the body's central plane 3 a (axial heat transfer) while the body's central plane 3 a transfers the heat to the body's outer side wall 3b, 3c (radial heat transfer).
  • the LED carrier plate 6 is pressed firmly against the body's central plane 3 a, which is done by a screw 6d extending through the LED carrier plate 6 and screwed into a screw hole of the body's central plane 3a.
  • a layer of thermal interfacing material 6e is interposed between the LED carrier plate 6 and the body's central plane 3a.
  • a ring 4 has matching threading on its outer surface, and is screwed into the body 3 for locking the window 5 and pressing the window 5 onto the LED carrier plate 6.
  • the driver carrier plate 8 with the electronic driver is located in the lower half of the body 3.
  • the driver carrier plate 8 plus electronic components form an integral unit with the terminals 12 soldered thereto, and this unit is placed in the base 2, with the lower ends of the terminals projecting out of the base 2.
  • the base plus said unit is screwed against the lower side of the body's central plane 3a, by means of screws 8d that extend through holes in the body's central plane 3 a and are screwed into screw holes of the base 2.
  • a substantially cylindrical insulator 7 extends around the driver carrier plate 8 and the electronic driver components to assure sufficient electrical insulation between the electrical parts of the driver and the body's lower wall 3c.
  • the body 3 is made of metal, usually aluminium or steel. Alternatively, possible materials are (thermal) plastics and ceramics.
  • An effective heat sink also needs to be able to efficiently lose its heat by radiation. So it is desirable that the outer surface of the metal body 3 has a high emission coefficient. In this respect, it is a problem that bare metal, especially bare aluminium, has a relatively low emission coefficient.
  • the outer surface of the metal body 3 determines to a large extent what the user "sees” of the lamp assembly, in other words it largely determines the visual experience of the user. In this respect, it is a problem that bare metal is not attractive aesthetically. Further, it is desirable to provide visible indicia on the outer surface of the lamp body, such as logos, power ratings, color temperature and other information. In this respect, it is a problem that it is not easy to apply indicia on bare metal in a reliable and nonerasable manner.
  • a further problem relates to safety regulations.
  • a malfunctioning there may be a hazard of the body carrying high voltages of mains level (for instance
  • the metal body is sometimes over-moulded with a thick layer of thermal plastic.
  • the lamp assembly when the lamp assembly reaches the end of its life and is discarded, it forms a waste product. Rather than just dumping it, it would be desirable to be able to recycle as many of the components as possible, including the metal of the body.
  • a general objective of the present invention is to overcome the above problems.
  • the present invention aims to provide a simple and relatively inexpensive method for improving the emission coefficient of the metal body while at the same time improving the aesthetic appearance.
  • the present invention aims to achieve the above objectives while allowing the metal body to remain blank metal.
  • the present invention provides the lamp assembly with a sleeve fitted tightly around the metal body.
  • the sleeve is made of an elastic material having an emission coefficient higher than the metal of the body.
  • the sleeve can be printed with indicia, as desired.
  • the sleeve can be simply pulled of the body to reveal the bare metal, or will automatically be detached from the body in standard recycle processes such as shredding.
  • FIGS. 1 A-C schematically show cross-sections and an exploded view of a prior art lamp assembly
  • figure 2A is a perspective view of an embodiment of a sleeve
  • figure 2B schematically shows a cross-section of a first embodiment of a lamp assembly according to the present invention
  • figure 3 schematically shows a cross-section of a second embodiment of a lamp assembly according to the present invention
  • figure 4 schematically shows a cross-section of a third embodiment of a lamp assembly according to the present invention.
  • figure 5 schematically shows a cross-section of a fourth embodiment of a lamp assembly according to the present invention.
  • FIG 2B is a schematical cross-section of a lamp assembly according to the present invention, indicated by reference numeral 101. All internal components may be identical to the components of the prior art assembly, therefore these internal components are not shown again. The figure only shows, in dotted lines, the outer contour of the lamp housing 10 and the window/lens 5, which also may be identical to the housing and window of the prior art assembly.
  • the lamp assembly 101 of the present invention is distinguished by the presence of a sleeve 150 tightly fitting around the housing 10.
  • Figure 2A is a perspective view of the separate sleeve 150, shown as a semi-transparent entity, while an actual embodiment does not necessarily have to be transparent.
  • the sleeve 150 At the front side (upper side in the figure) of the lamp assembly, the sleeve 150 has an opening 153 leaving the window 13 free, such as not to hinder the light output. At the rear side (lower side in the figure) of the lamp assembly, the sleeve 150 leaves the electrical terminals 12 free. Apart from these free regions, the sleeve 150 may extend over the entire outer surface of the housing 10, i.e. extend over the entire axial length of the housing 10 (vertical direction in the drawing) plus an annular portion of the front face of the lamp housing plus an annular portion of the rear face of the housing.
  • the sleeve 150 leaves free a rearmost portion of the housing 10, as illustrated in figure 3, which is a schematical cross-section, comparable to figure 2B, of a second embodiment of the lamp assembly according to the present invention, indicated by the reference numeral 102. It is noted that the sleeve 150 shown in figure 2A corresponds to this embodiment.
  • the housing consists of a relatively wide front portion 14 and a relatively narrow rear portion 15 of substantially constant width, also indicated as "foot"
  • the sleeve 150 extends at least over the entire surface of the front portion 14.
  • the outer surface of this rear portion 15 forms a mechanical interface with a lamp holder, and the presence of a sleeve may interfere or the sleeve may get damaged.
  • the sleeve may be implemented as a one-part whole, as illustrated in the two embodiments above. However, it is also possible that the sleeve 150 consists of two (or more) portions 151, 152 adjoining and perhaps (but not necessarily) partly overlapping each other, as illustrated in the third embodiment of figure 4, generally indicated by reference numeral 103. Such embodiment may be easier to apply.
  • the sleeve can be arranged even around an existing lamp housing.
  • the sleeve can extend over the light output window, or the sleeve can even carry the lens plate or have the lens plate 105 integrated, as shown in the embodiment of figure 5, which is generally indicated by reference numeral 104.
  • the housing 10 has a light output opening 16 and the sleeve, i.e. the sleeve's lens plate 105, is covering this opening.
  • the material of the sleeve preferably is a polymer or a silicone.
  • the following is a list of examples of suitable materials, which list does not claim to be exhaustive:
  • Unsaturated rubbers that can be cured by sulfur vulcanization are unsaturated rubbers that can be cured by sulfur vulcanization:
  • Natural polyisoprene cis- 1 ,4-polyisoprene natural rubber (NR) and trans- 1 ,4- polyisoprene gutta-percha
  • Chloroprene rubber (CR), polychloroprene, Neoprene, Baypren etc.
  • butyl rubber (copolymer of isobutylene and isoprene, IIR)
  • Halogenated butyl rubbers chloro butyl rubber: CIIR; bromo butyl rubber:
  • Styrene-butadiene Rubber copolymer of styrene and butadiene, SBR
  • Nitrile rubber copolymer of butadiene and acrylonitrile, NBR
  • Buna N rubbers also called Buna N rubbers
  • EPM ethylene propylene rubber, a copolymer of ethylene and propylene
  • EPDM rubber ethylene propylene diene rubber, a terpolymer of ethylene, propylene and a diene-component
  • Silicone rubber (SI, Q, VMQ)
  • Fluoroelastomers FKM, and FEPM
  • PEBA Polyether block amides
  • CSM Chlorosulfonated polyethylene
  • EVA Ethylene-vinyl acetate
  • TPE thermoplastic elastomers
  • TPV Thermoplastic vulcanizates
  • TPU Thermoplastic polyurethane
  • TPO Thermoplastic olefins
  • the sleeve can be made as a formpiece by injection moulding of polymer(s) or silicone(s). Alternatively, the sleeve can be made by dip-moulding.
  • the sleeve may have a proper size smaller than the outer size of the lamp housing, and may be elastically stretched to fit around the housing. It is also possible that the sleeve is made as a shrink foil that is shrunk around the housing by a heat treatment, for instance made of PE or PET material, which foil is made by extrusion. It is also possible that the sleeve is made as a relatively small, shapeless sock that is elastically stretched to fit around the housing.
  • the sleeve can be provided with labeling or indicia either during the moulding process (this can for example be done by in-mould labeling or embossed features in the mould) or later.
  • the present invention provides lamp assembly that comprises a housing; at least one light-generating element and possible driving electronics for the light- generating element arranged within the housing; electrical terminals for electrically coupling the assembly to a lamp socket.
  • the housing is externally provided with a tight-fitting sleeve.
  • a sleeve around the housing of the lamp assembly offers many advantages, wherein a key issue is that the housing of the lamp can be made of blank metal (i.e. bare metal).
  • the sleeve can provide for a high thermal radiation emission coefficient so that the housing can properly function as a heat sink, thus avoiding the need to paint the metal.
  • the sleeve can be printed with a labeling and/or indicia, thus avoiding the need to print the metal.
  • the processing steps of coating and printing can thus be omitted, which leads to cost-reduction and reduced the environmental impact.
  • the uncoated metal is easier to recycle, so that the uncoated metal has a higher rest-value than coated metal.
  • a further advantage is that the sleeve can provide electrical insulation and thus make the lamp fulfill electrical safety requirements.
  • a further advantage is that the sleeve can increase the IP rating (ingress protection) of the LED lamp.
  • a further advantage is that the sleeve allows a designer much freedom and new possibilities with regard to Look And Feel of LED lamps. Material choice offers the possibility of high gloss, matted, soft, or even (embossed/recessed) relief surfaces.
  • the thickness of the sleeve may be chosen in dependency of the required functionality and on the choice of material. In general, a larger thickness will reduce the thermal radiation performance but will increase the mechanical strength, electrical insulation and fire resistance. In practice, a suitable thickness seems to be in the order of about 1 mm or less. In this respect, it is to be noted that the thickness of the sleeve 150 is not intended to be shown on scale in the figures.
  • the safety standards have to be taken into account, in conjunction with the insulative properties of the sleeve material.
  • regulations may provide that an insulator should be able to withstand a voltage difference of 3750 VDC.
  • silicone for instance grade 6050 commercially available from Momentive, having a dielectric strength of about 20 kV/mm, the minimum thickness is 0.1875 mm.
  • PUR for instance grade 930 commercially available from Wevo Chemie, having a dielectric strength of about 30 kV/mm, the minimum thickness is 0.125 mm.
  • similar regulations may provide that an insulator should be able to withstand a voltage difference of 2500 VDC, and the
  • the safety rating may be 500 V, in which case the minimum thickness may be as low as 0.025 mm or 0.0166 mm, respectively.
  • the thickness may be chosen as high as 0.3 mm. Larger thickness will improve strength and will further improve insulating properties, but the thermal properties may become an issue.
  • the heat needs to be conveyed to the outside surface, and this is improved by having a high thermal conductivity.
  • a low thickness such as 0.3 mm or lower, an adequate and quick heat transport to the outside surface is guaranteed even if the thermal conductivity of the material is relatively low.
  • the thickness of the sleeve is increased, this may result in increased wall temperature of the assembly housing if the thermal conductivity of the material is relatively low. This in turn would reduce the heat transport from the LEDs to the heat sink, thus increasing the temperature of the LEDs.
  • the sleeve thickness could be selected as high as 0.5 mm or even 1.0 mm.
  • the lamp power of the lamp assembly, and the electrical efficiency of the lamp also play a role.
  • the sleeve is fitting tightly around the housing such as to have good thermal contact with the housing, it is nevertheless a separate component that is not adhering to the housing so that it can easily be removed for recycling.
  • the sleeve may be provided with mechanical coupling elements, such as snap connection, screw thread, for mating with complementary elements of a lamp holder.
  • the invention has been described in the context of an LED lamp, the invention can also be applied in the case of lamp assemblies comprising one or more light-generating elements of a different type. Even if a light-generating element is used of a type that does not generate much heat so that the assembly housing does not need to function as a heat sink, and/or if the assembly housing is not made of metal, the use of a sleeve as described is still advantageous in view of the multiple advantages described.
  • the invention has been described for a lamp assembly having a shape corresponding to the MR- 16 design, and having axial connector pins of constant diameter.
  • the lamp assembly has a different shape, for instance the shape of a classical bulb, and/or it is possible that the electrical terminals have a different shape, for instance connector pins with a T-shaped cross section for a twist-lock, or even Edison threading or a bajonet-type mount is possible.
  • the invention has been described for a lamp assembly comprising a housing and an LED, which assembly as a whole is fitted into a lamp socket.
  • the light-generating element is not an LED but is for instance a halogen lamp, in which case the halogen lamp is the replaceable element and the luminaire comprises a heat sink element, it is also that the heat sink element of the luminaire is provided with a sleeve as described.
  • the metal housing can be left blank
  • the use of the sleeve is not limited to covering blank metal housings. It is within the scope of the present invention to apply the sleeve over an existing lamp housing, which happens to be already coated, in order to improve the thermal radiation efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

La présente invention a trait à un ensemble lampe (101 ; 102 ; 103 ; 104) qui comprend : un logement (10) ; au moins un élément de production de lumière (21) et l'éventuelle électronique de commande de l'élément de production de lumière agencé à l'intérieur du logement ; des bornes électriques (12) permettant de coupler électriquement l'ensemble à une douille de lampe. Selon l'invention, le logement (10) est équipé sur sa partie extérieure d'un manchon bien ajusté (150). Ce manchon améliore les propriétés d'émission de rayonnement du logement, de sorte que le logement peut fonctionner en tant que puits de chaleur sans qu'il soit nécessaire de fournir un revêtement au logement.
PCT/IB2012/050636 2011-02-24 2012-02-13 Ensemble lampe Ceased WO2012114225A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11155727 2011-02-24
EP11155727.8 2011-02-24

Publications (2)

Publication Number Publication Date
WO2012114225A2 true WO2012114225A2 (fr) 2012-08-30
WO2012114225A3 WO2012114225A3 (fr) 2012-11-01

Family

ID=45774280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/050636 Ceased WO2012114225A2 (fr) 2011-02-24 2012-02-13 Ensemble lampe

Country Status (1)

Country Link
WO (1) WO2012114225A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102642A1 (fr) * 2012-12-24 2014-07-03 Koninklijke Philips N.V. Ensemble d'éclairage
EP3038135A1 (fr) * 2014-12-22 2016-06-29 St. Albert Innovations, LLC Couvercle destiné à une ampoule

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0974787A3 (fr) * 1998-07-23 2001-11-21 MELA Industrieprodukte GmbH Lampe, boítier notamment pour une lampe et dispositif de fixation pour le montage d'un élément fonctionnel dans le boítier
DE19952827A1 (de) * 1999-11-02 2001-05-10 Mela Industrieprodukte Gmbh Beleuchtungsvorrichtung mit einer Gasentladungslampe, insbesondere Xenon-Lichtbogen-Lampe
US7061169B1 (en) * 2004-04-22 2006-06-13 Fung Duncan C Impact and corrosion resistant lamp holder
US20080089060A1 (en) * 2006-10-17 2008-04-17 Philips Solid-State Lighting Solutions Methods and apparatus for improving versatility and impact resistance of lighting fixtures
IT1390783B1 (it) * 2008-07-24 2011-09-23 Nike Srl Struttura di lampada a led con circuito elettronico interno perfezionata

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014102642A1 (fr) * 2012-12-24 2014-07-03 Koninklijke Philips N.V. Ensemble d'éclairage
EP3038135A1 (fr) * 2014-12-22 2016-06-29 St. Albert Innovations, LLC Couvercle destiné à une ampoule

Also Published As

Publication number Publication date
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