EP1669667A1 - Lampe mit Dioden - Google Patents

Lampe mit Dioden Download PDF

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Publication number
EP1669667A1
EP1669667A1 EP04425912A EP04425912A EP1669667A1 EP 1669667 A1 EP1669667 A1 EP 1669667A1 EP 04425912 A EP04425912 A EP 04425912A EP 04425912 A EP04425912 A EP 04425912A EP 1669667 A1 EP1669667 A1 EP 1669667A1
Authority
EP
European Patent Office
Prior art keywords
lighting device
primary
optical
lens
circuit board
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
EP04425912A
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English (en)
French (fr)
Other versions
EP1669667B1 (de
Inventor
Dante Cariboni
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.)
Cariboni Lite Srl
Original Assignee
Cariboni Lite Srl
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 Cariboni Lite Srl filed Critical Cariboni Lite Srl
Priority to AT04425912T priority Critical patent/ATE400771T1/de
Priority to EP04425912A priority patent/EP1669667B1/de
Priority to DE602004014951T priority patent/DE602004014951D1/de
Publication of EP1669667A1 publication Critical patent/EP1669667A1/de
Application granted granted Critical
Publication of EP1669667B1 publication Critical patent/EP1669667B1/de
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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F21V14/025—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources in portable lighting devices
    • 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
    • F21V14/065—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors in portable lighting devices
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • 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
    • F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
    • F21V21/0824—Ground spikes
    • 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
    • F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
    • F21V29/81—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires with pins or wires having different shapes, lengths or spacing
    • 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 refers to a lighting device based on LED (light emitting diode) sources, able to generate beams of light to illuminate walls, ceilings, corners, or any type of object.
  • LED light emitting diode
  • the object of the present invention is to provide a lighting device based on LED sources, which is able to generate light beams having a high light intensity to illuminate any type of object, wall or corner.
  • Another object of the present invention is to provide such a lighting device that is versatile and able to provide various types of application and mounting, such as wall mounting or movably on a tilting system in spotlight mode mounting
  • Another object of the present invention is to provide such a lighting device that is reliable and at the same time easy to assemble and to produce.
  • the lighting device for illuminating objects according to the invention comprises:
  • the angle of incidence of the light on the secondary optical assembly can be varied, so as to obtain various configurations of light beams leaving the secondary optical assembly of the lighting device, according to the lighting requirements.
  • the lighting device 1 comprises:
  • the light sources used in the lighting device 1 are LED (light emitting diodes).
  • the single LED 20 comprises an emitter 21 consisting of a chip of a solid-state device.
  • Two metal terminals 22 are connected to the emitter 21 for the electrical supply.
  • the LED 20 (of the Lambertian type), due to its morphology, emits light around its optical axis, according to a cone having an angle of aperture ⁇ of about 140°.
  • the LED 20 used has a high light intensity and can have a power of 1-3 W or greater, according to availability on the market.
  • the printed circuit board 2 of the lighting device 1 is substantially square-shaped, with a thickness of about 1.5 mm and is preferably made from an aluminium plate.
  • Two LEDs 20 are mounted side by side, in a central position, on the circuit board 2 and are disposed along the midline of the board 2. As shown in Figure 4, the LEDs 20 are equidistant from the respective side edges of the board and the distance D between the optical axes of the emitters of the LEDS 20 is about 14 mm.
  • optical axis is used hereunder to indicate the axis passing through the centre of the light input surface of the lens and at right angles to the plane tangent to the centre of said light input surface.
  • the LEDS 20 are soldered on the board 2 and are connected to each other in series. That is to say, two terminals 22 of two LEDs 20 are connected to each other, whilst the other two terminals 22 of the LEDs are connected to respective conductive tracks (24, 24') formed on the circuit board 2.
  • the conductive tracks (24, 24') lead towards a corner of the circuit board 2 to be connected respectively to the positive pole (+) and to the negative pole (-) of an electrical supply device, which supplies both LEDs 20 at the same time.
  • Respective window openings (25, 25') for the passage of electrical supply cables are formed on both sides of the circuit board 2, in a central position.
  • Two rows of four holes (26, 26') for fixing of the primary optical assemblies 3 are formed on the circuit board 2 on one side and on the other of the median line passing through the two LEDs 22.
  • the letters L and W are alternately indicated on the board near the four aligned holes 26 to indicate the type of mounting of the primary optical assemblies 3.
  • two further holes 27 are formed in the board 2 for mounting thereof on the heat sink 4 or on the body 5.
  • the light emitted by the LEDs 20 is not sufficient to provide adequate illumination. For this reason the LEDs 20 must be coupled to respective primary optical assemblies 3, which serve to amplify the light emitted by the LEDs 20 and to direct it in the desired direction.
  • the single primary optical assembly 3 used in the lighting device 1 comprises a primary optical lens 30 supported by a supporting cradle 31.
  • the primary lens 30 is substantially paraboloid in shape and has a substantially convex light entry surface with a substantially circular perimeter and a curved, paraboloid-shaped light output surface.
  • the primary lens 30 has a circular collar 32 protruding radially from its larger diameter edge.
  • the primary lens 30 is made of a transparent plastic material, like PMMA (polymethylemethacryate).
  • the cradle 31 is made of hard heat-resistant plastic and has a substantially cylindrical hollow body 33 from which two tongues or feet 34 disposed in diametrically opposite positions protrude outwards.
  • the inside diameter of the body 33 is slightly larger than the outside diameter of the LED 20 and its height is slightly greater than the height of the LED 20.
  • a circumferential groove 36, inside which the collar 32 of the primary lens 30 is snap engaged, is formed in the upper internal edge of the cylindrical body 33 of the cradle 31.
  • the primary optical assemblies 3 are mounted on the printed circuit board 2 so that the LED 20 is contained inside the cylindrical body of the cradle 31 and the flat surface of the primary lens 30 is disposed above the lens 23 of the LED 20, almost in contact therewith.
  • the tongues 34 of the cradles 31 are fixed in the holes 26 distinguished by the letter "L".
  • assembly is eccentric or offset, that is to say the optical axes of the primary lenses 30 do not coincide with the respective optical axes of the LEDs 20.
  • the distance A1 between the optical axis of the left-hand LED 20 (with reference to Figure 9) and the optical axis of the respective coupled primary lens 30 is about 0.5 mm
  • the distance A2 between the optical axis of the right-hand LED 20 (with reference to Fig. 9) and the optical axis of the respective coupled primary lens 30 is about 0.3 mm.
  • the centre distance I between the two primary lenses 30 is about 13.8 mm.
  • the emitters of the LEDs 20 are out of axis with respect to the primary lenses 30, the cones of light emitted by the two LEDs 20 are deviated when they meet the respective primary lenses 30.
  • the primary lenses 30 generate light beams with a slight inclination towards the right (with reference to Fig. 9) with respect to their optical axis.
  • the beam leaving the first primary lens will have a greater inclination with respect to the beam leaving the second primary lens, since the distance A1 between the axis first of the primary lens and the axis of the respective LED is greater than the distance A2 between the axis of the second primary lens and the axis of the respective LED.
  • the circuit board 2 is mounted on the heat sink 4 made of pressure die-cast aluminium.
  • the heat sink 4 is shaped as a substantially square plate which has a plurality of cylindrical protrusions 40 disposed in the rear surface to dissipate the heat outward.
  • the heat sink 4 has a through hole 41 for passage of the electrical supply cable.
  • the electrical supply cable is sealed inside the hole 41 of the heat sink by means of special sealing resins both to ensure the desired degree of IP protection and for mechanical anchoring of the cable.
  • Two tongues 42 in the form of rounded pins provided with respective fixing holes 46 are provided at the side ends of the heat sink 4.
  • Holes 43 are formed in the flat front wall of the heat sink 4 to receive fixing screws of the circuit board 2.
  • the circuit board 2 is fixed on the heat sink also by means of a special paste disposed between the two elements, which improves heat conduction and compensates for any problems in the flatness of the contact surfaces.
  • a seat 45 on which the rear edge of the body 5 can abut is formed along the peripheral edge of the heat sink 4.
  • the body 5 is substantially parallelepiped-shaped and is made of pressure die-cast aluminium. The rear edge of the body 5 is glued into the seat 45 of the heat sink.
  • a seat 50 able to receive the secondary optical assembly 6 consisting of a single optical lens is formed in the upper edge of the body 5.
  • the secondary lens 6 is substantially cylindrical in shape and has a substantially convex light input surface with a substantially square perimeter, and a curved light output surface with a substantially cylindrical curvature. That is to say, the secondary lens 6 is obtained from a square section of a cylinder.
  • the secondary lens 6 serves to define the shape of the light beam leaving the lighting device 1.
  • the shape of the light beam leaving the lighting device is defined by the arrangement of the primary lenses 30 with respect to the LEDs 20 and with respect to the secondary lens 6.
  • the respective orthogonal axes of symmetry of the light input plane of the secondary lens 6 are indicated by X and Y. It must be considered that the axis X is transverse with respect to the axis of cylindrical curvature of the secondary lens 6; on the other hand the axis Y is parallel to the axis of cylindrical curvature of the secondary lens 6.
  • the axes X and Y meet at a point O in which the optical axis of the secondary lens passes.
  • the optical axis O is orthogonal to the light input plane.
  • the circuit board 2 is mounted eccentrically inside the body 5, so that the optical axes of the primary lenses 30 are situated on the Y axis, whilst the axis of symmetry between the optical axes of the two primary lenses 30, indicated by S, does not coincide with the optical axis O of the secondary lens 6.
  • the distance B1 between the optical axis of the first primary lens 30 and the optical axis of the secondary lens 6 is about 12.25 mm, whereas the distance B2 between the optical axis of the second primary lens 30 and the optical axis of the secondary lens 6 is about 1.55 mm.
  • the primary lenses 30 are mounted off-centre with respect to the respective LEDs 20 so as to generate an optical beam for both light sources deviated in the direction of the optical axis O of the cylindrical secondary lens 6. In this manner a light beam whose section assumes a shape of a so-called "blade of light” will leave the secondary lens.
  • the lighting device 1 according to the first embodiment of the invention can be used in wall or corner mounting, alone or in combination with other lighting devices of the same type.
  • a single lighting device can have a remote power supply, whilst in the case of a plurality of lighting devices 1 the power supply can be integrated between them.
  • a lighting device 101 according to a second embodiment of the invention is described with the aid of Figures 14-19.
  • the primary lenses 30 are mounted coaxial on the respective LEDs 20.
  • the tongues 34 of the supporting cradles 31 of the primary lenses are fixed in the holes 26 of the circuit board 2 denoted by the letter W.
  • the centre distance between the two primary lenses 30 is equal to the centre distance between the two LEDs, indicated by D and equal to about 14 mm.
  • the circuit board 2 is mounted centred inside the body 5 so that the optical axes of the two primary lenses 30 pass through the axis Y and the axis of symmetry S of the two primary lenses 30 coincides with the optical axis O of the secondary lens 6.
  • the LEDs 20 generate respective cones of light which pass through the primary lenses 30 which generate respective light beams collimated in the direction of the secondary cylindrical lens 6 from which a light beam whose section assumes the shape of a so-called "blade of light” exits.
  • the lighting device 101 can be mounted tiltingly in a substantially U-shaped support bracket 7.
  • the support bracket 7 comprises a base 70 from which two support plates 71 protrude. Respective holes 73 in which the two protruding tongues 42 of the heat sink 4 are pivoted are formed in the support plates 71.
  • the lighting device can rotate around the axis passing through the two protruding tongues 42 of the heat sink, which is parallel to the axis Y passing through the two optical axes of the two primary lenses 30.
  • a hole is formed in the base 70 of the bracket 7 through which the electrical supply cable 74, which will be inserted in the hole 41 of the heat sink 4, passes.
  • a pointed picket 75 able to be anchored to a soft terrain, such as a lawn, can be provided in the base 70 of the bracket 7.
  • a lighting device 201 according to a third embodiment of the invention is described with reference to Figures. 20 - 24.
  • the only change with respect to the second embodiment is represented by the fact the circuit board 2 supporting the LEDs 20 and the primary optical assemblies 3 is rotated 90° with respect to the position illustrated in the second embodiment and thus the circuit board 2 is applied on the heat sink 4.
  • the pivot tongues 42 of the heat sink are disposed along an axis parallel to the axis X of the secondary lens 6.
  • the lighting device 201 when the lighting device 201 is mounted on the bracket 7, as shown in Figure 24, it takes on a configuration rotated 90° around the optical axis O of the secondary lens 6 with respect to the configuration taken on by the lighting device 101 in Figure 18.
  • the lighting device 201 can be used to generate symmetrical light beams with different apertures on the two planes of projection (tangential plane of projection and sagittal plane of projection). These light beams generated by the lighting device 201 are commonly called wall-washers.
  • FIG 25 a lighting device 301 according to a fourth embodiment of the invention is illustrated.
  • the lighting device 301 has a configuration similar to that of the lighting device 101 of the second embodiment.
  • the cylindrical secondary lens 6 is replaced by a flat secondary lens 306 of transparent glass.
  • the beam emitted by the lighting device 301 will have a cone-shaped angular aperture with its apex near the output plane of the flat secondary lens 306.
  • the angular aperture of the light beam will depend upon the position of the primary optical assembly 3 with respect to the secondary lens 306. The smaller the distance between the primary optical assembly 3 and the secondary lens 306, the greater the angular aperture of the conical light beam.
  • the circuit board 2 is disposed inside the body 5, distanced from the heat sink 4, so as to reduce the distance between the primary lenses 30 and the secondary lens 306.
  • said assembly (LED 20 - cradle 31 - primary lens 30) can be replaced by one or more pre-collimated LED light sources with an angle of aperture of the emitted light beam of about 30°-40°.
  • the primary lens is an integral part of the LED light source.

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)
  • Massaging Devices (AREA)
EP04425912A 2004-12-07 2004-12-07 Lampe mit Dioden Not-in-force EP1669667B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT04425912T ATE400771T1 (de) 2004-12-07 2004-12-07 Lampe mit dioden
EP04425912A EP1669667B1 (de) 2004-12-07 2004-12-07 Lampe mit Dioden
DE602004014951T DE602004014951D1 (de) 2004-12-07 2004-12-07 Lampe mit Dioden

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425912A EP1669667B1 (de) 2004-12-07 2004-12-07 Lampe mit Dioden

Publications (2)

Publication Number Publication Date
EP1669667A1 true EP1669667A1 (de) 2006-06-14
EP1669667B1 EP1669667B1 (de) 2008-07-09

Family

ID=34932928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425912A Not-in-force EP1669667B1 (de) 2004-12-07 2004-12-07 Lampe mit Dioden

Country Status (3)

Country Link
EP (1) EP1669667B1 (de)
AT (1) ATE400771T1 (de)
DE (1) DE602004014951D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927405A1 (fr) * 2008-02-08 2009-08-14 Fabien Sellner Dispositif d'eclairage intelligent economique froid pour tout type de route et terrain,sur terre ou sur mer,au moyen de diodes electroluminescentes (led)
EP2119955A1 (de) * 2008-04-23 2009-11-18 COEMAR S.p.A. LED-Beleuchtungsvorrichtung
DE102009024614A1 (de) * 2009-06-12 2010-12-16 Olsa S.P.A. Beleuchtungsvorrichtung für ein Fahrzeug

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5896093A (en) * 1998-04-03 1999-04-20 Sjobom; Fritz C. L.E.D. light assembly for traffic arrowboards
EP0979969A2 (de) * 1998-08-12 2000-02-16 Stanley Electric Co., Ltd. LED-Lampe
US20010007527A1 (en) * 2000-01-07 2001-07-12 U.S. Philips Corporation Luminaire
JP2002208305A (ja) * 2001-01-11 2002-07-26 Fushi Enterprise:Kk 光拡散型ｌｅｄランプ
US20040130891A1 (en) * 2002-11-22 2004-07-08 Harald Twardawski Mobile lamp
EP1445638A2 (de) * 2003-02-07 2004-08-11 R. Stahl Schaltgeräte GmbH Scheinwerfer, insbesondere Taschenleuchte, mit Leuchtdioden und dioptrischen Einrichtungen
WO2004070268A2 (fr) * 2003-01-29 2004-08-19 Zedel Dispositif d’eclairage portatif a diode electroluminescente
US20040223342A1 (en) * 2001-12-31 2004-11-11 Klipstein Donald L. LED inspection lamp, cluster LED, and LED with stabilizing agents

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5896093A (en) * 1998-04-03 1999-04-20 Sjobom; Fritz C. L.E.D. light assembly for traffic arrowboards
EP0979969A2 (de) * 1998-08-12 2000-02-16 Stanley Electric Co., Ltd. LED-Lampe
US20010007527A1 (en) * 2000-01-07 2001-07-12 U.S. Philips Corporation Luminaire
JP2002208305A (ja) * 2001-01-11 2002-07-26 Fushi Enterprise:Kk 光拡散型ｌｅｄランプ
US20040223342A1 (en) * 2001-12-31 2004-11-11 Klipstein Donald L. LED inspection lamp, cluster LED, and LED with stabilizing agents
US20040130891A1 (en) * 2002-11-22 2004-07-08 Harald Twardawski Mobile lamp
WO2004070268A2 (fr) * 2003-01-29 2004-08-19 Zedel Dispositif d’eclairage portatif a diode electroluminescente
EP1445638A2 (de) * 2003-02-07 2004-08-11 R. Stahl Schaltgeräte GmbH Scheinwerfer, insbesondere Taschenleuchte, mit Leuchtdioden und dioptrischen Einrichtungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 11 6 November 2002 (2002-11-06) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2927405A1 (fr) * 2008-02-08 2009-08-14 Fabien Sellner Dispositif d'eclairage intelligent economique froid pour tout type de route et terrain,sur terre ou sur mer,au moyen de diodes electroluminescentes (led)
EP2119955A1 (de) * 2008-04-23 2009-11-18 COEMAR S.p.A. LED-Beleuchtungsvorrichtung
DE102009024614A1 (de) * 2009-06-12 2010-12-16 Olsa S.P.A. Beleuchtungsvorrichtung für ein Fahrzeug

Also Published As

Publication number Publication date
EP1669667B1 (de) 2008-07-09
ATE400771T1 (de) 2008-07-15
DE602004014951D1 (de) 2008-08-21

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