EP1828671A1 - Beleuchtungseinrichtung mit mindestens einer leuchtdiode und fahrzeugscheinwerfer - Google Patents
Beleuchtungseinrichtung mit mindestens einer leuchtdiode und fahrzeugscheinwerferInfo
- Publication number
- EP1828671A1 EP1828671A1 EP05822978A EP05822978A EP1828671A1 EP 1828671 A1 EP1828671 A1 EP 1828671A1 EP 05822978 A EP05822978 A EP 05822978A EP 05822978 A EP05822978 A EP 05822978A EP 1828671 A1 EP1828671 A1 EP 1828671A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- locking
- lighting device
- emitting diode
- heat sink
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000005286 illumination Methods 0.000 claims description 47
- 230000003287 optical effect Effects 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 8
- 230000005670 electromagnetic radiation Effects 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000003466 welding Methods 0.000 description 5
- 238000004382 potting Methods 0.000 description 4
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 244000283070 Abies balsamea Species 0.000 description 1
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- 239000004858 Canada balsam Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- F21K9/20—Light sources comprising attachment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/19—Attachment of light sources or lamp holders
- F21S41/192—Details of lamp holders, terminals or connectors
-
- 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
- F21V29/54—Cooling arrangements using thermoelectric means, e.g. Peltier elements
-
- 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
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
-
- 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
-
- 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
- F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
-
- 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
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
-
- 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
- Lighting device with at least one light emitting diode and vehicle headlights
- the invention relates to a lighting device according to the preamble of patent claim 1 and a vehicle headlamp with at least one such lighting device.
- Such a lighting device is disclosed for example in EP-A 1 298 382.
- This document describes a lighting device with a plurality of light emitting diodes, which are arranged on a heat sink, and an optic and an electrical module for operating the light emitting diodes.
- This lighting device is intended for use in a vehicle and as a replacement for a conventional light bulb.
- the lighting device has at least one light emitting diode and a heat sink for cooling the at least one light emitting diode, wherein the
- Heat sink locking means are arranged, which serve to form a bayonet lock with a holder for the lighting device.
- the plug-in Rotary movement which is required in the bayonet closure for establishing the connection between the lighting device and its holder, ensures reliable attachment of the lighting device.
- a defined mounting position of the lighting device according to the invention can be achieved in its holder.
- the locking means comprise at least two locking tabs arranged along a circular arc.
- at least two support points are formed, which ensure a stable fixation of the illumination device in its holder.
- three locking tabs are provided, which are used both as a reference for the orientation of the LEDs and the primary optics on the heat sink of thecitedseinrichtimg as well as a reference for the orientation of the illumination device relative to a holder or against the light-guiding means of a vehicle headlamp.
- the aforementioned locking tabs are integrally formed according to an exemplary embodiment of the illumination device according to the invention to a portion of the heat sink with a circular cylindrical geometry.
- the locking tabs, together with the heat sink can be produced in one production step.
- the locking tabs are formed as part of a fastening ring, which is mounted on the heat sink.
- the mounting ring opens up additional adjustment options.
- the mounting ring allows a so-called 5-axis or 6-axis adjustment.
- the orientation of the light-emitting diodes or of the primary optics with respect to the locking tabs can be determined, for example, by rotating the fastening ring with respect to the heat sink about its ring axis and closing fixation in this position.
- the installation depth of the light-emitting diodes or the primary optics in the holder for the illumination device for example, by moving the mounting ring along its axis on the heat sink and subsequent fixing in the position can be adjusted to the desired value.
- the angle between the reference plane and the support plate for the LEDs or the mounting surface of the primary optics of the illumination device for example by tilting the mounting ring and then fixing in the inclined position, can be adjusted.
- At least one of the locking tabs has a shape that deviates from the shape of the other locking tabs. This allows a clear definition of the mounting position of the lighting device in its holder.
- the shape of the locking tabs can be used to encode different types of lighting devices by providing different types of lighting devices with differently shaped locking tabs.
- a spring ring is advantageously provided, which acts as an abutment to the locking tabs in the locking of the bayonet closure.
- the illumination device has an electrical connection with at least one metallic contact web which extends perpendicular to the axis of rotation of the bayonet closure, so that by the rotational movement when locking or unlocking the bayonet closure of the electrical contact between the at least one metallic contact bar and its mating contact is made or dissolved.
- the electrical contact between the electrical connection of the lighting device and the socket contacts their power supply is made simultaneously with the locking of the bayonet closure. INS special, no further action is required to connect the lighting device after mounting in its holder to the power supply.
- the lighting device according to the invention is used for example as a light source in a vehicle lamp, preferably in the vehicle headlight.
- a plurality of the illumination devices according to the invention can be arranged in a holder in a vehicle headlight in order to realize light distributions for different applications.
- By turning on the aforementioned lighting devices in different combinations, for example, parking lights, daytime running lights, low beam, high beam, fog lights, etc. can be realized with this vehicle headlights.
- the vehicle headlight according to the invention has at least one illumination device arranged in a holder of the vehicle headlight, which has at least one light-emitting diode and a heat sink for the at least one light-emitting diode, and light-directing means for the light generated by the at least one illumination device, wherein the heat sink is provided with first locking means is that form a bayonet with second locking means on the holder a bayonet.
- the light-guiding means is a reflector, for example a free-form surface reflector, or an optical system with optical fibers and / or optical lenses or a combination of a reflector with such an optical system.
- the first locking means comprise at least three locking tabs which run along one
- the second locking means comprise a mounting opening in the holder for the lighting device, the edge pass- has just recesses for the at least three locking tabs.
- the second locking means comprise a stop for at least one of the locking tabs, which serves to limit the rotational movement when locking the bayonet closure. This ensures correct installation of the lighting device in the holder provided for the vehicle headlight.
- the second locking means also comprise a ramp-shaped web at the edge of the mounting opening in order to prevent an automatic unlocking of the bayonet closure.
- the at least one illumination device of the vehicle headlamp is provided with an electrical connection having at least one contact web extending perpendicular to the axis of rotation of the bayonet closure, so that by the rotational movement when locking or unlocking the bayonet closure of the electrical contact between the at least a contact bar and a mating contact on the vehicle headlight is made or dissolved.
- no further handle is required to connect the at least one lighting device after mounting in its holder to the power supply.
- Figure 1 is a plan view of the front of a lighting device according to the first embodiment of the invention
- Figure 2 is a plan view of the back of the illumination device according to the first embodiment of the invention
- Figure 3 is a representation of the mounting hole in the vehicle headlamp, which is tuned to the embodiments shown in Figures 1, 2, 5 and 6
- Figure 4 is a side view of a lighting device according to the second exemplary embodiment of the invention
- Figure 5 is a side view of a lighting device according to the third embodiment of the invention.
- Figure 6 is a plan view of the back of the illumination device according to the third embodiment of the invention.
- Figure 7 shows a cross section through a lighting device according to the fourth embodiment of the invention
- Figure 8 shows a cross section through a lighting device according to the fifth
- FIGS. 1 and 2 show the illumination device according to the first exemplary embodiment.
- This lighting device has a heat sink 1 with a circular disk-shaped mounting surface 10 and parallel cooling fins 1 1, 12, 13, 14, 15, 16, which extend perpendicular to the mounting surface 10.
- the heat sink 1 is formed as a one-piece die-cast aluminum part.
- the outer contour of the heat sink 1 substantially corresponds to that of a circular cylinder, apart from the cavities between the cooling fins 1 1 to 16 and the locking tabs 17, 18, 19, which are part of a bayonet between the lighting device and a vehicle headlight.
- the three locking tabs 17, 18, 19 are arranged equidistantly along the circumference of the circular cylindrical mounting surface 10 at a distance of 120 degrees. They are directed radially outward.
- the two locking tabs 17, 18 have the same shape, but are mirror-symmetrical with respect.
- the diameter of the mounting surface 10 is arranged, which extends centrally through the third locking tab 19.
- the locking tab 19 has a different shape than the first 17 and second locking tab 18 to ensure a clear orientation and installation position of the illumination device in the vehicle headlight.
- the two outer cooling fins 1 1 and 16 have on their outer surface a profile 1 Ia or 16a, in order to ensure a better grip when operating the bayonet closure. to ensure this.
- the mounting surface 10 has a recess 102 to provide space for mounting a lateral, acting perpendicular to the axis of rotation of the bayonet fitting pressure spring 103.
- the pressure spring 103 is disposed between the locking tab 19 and the spring ring 101. It is covered in the illustration of Figure 1 by the locking tab 19.
- the metal core board 2 is a metal plate which is provided with an electrical insulation, for example made of ceramic. On the electrical insulation of the metal core board 2 printed conductors 21 are arranged for electrical contacting of the LED chips 3.
- the support plate or metal-core board 2 ensures electrical insulation between the metallic heat sink 1 and the LED chips 3.
- the support plate 2 is, for example, mechanically, by clamping fit in a recess of the heat sink 1 or by means of a latching connection or with the aid of an adhesive the mounting surface 10 of the heat sink 1 anchored.
- two holes in the mounting surface 10 may be mounted, in each of which engages a properly shaped pin on the underside of the support plate 2. These holes can also define the orientation and mounting position of the carrier plate 2 with respect to the locking tabs 17-19.
- the five light-emitting diode chips 3 are arranged in a row on the carrier plate 2 and surrounded by the walls of a so-called potting trough 4, so that the row consisting of the five light-emitting diode chips 3 is arranged at the bottom of the potting pan 4.
- the Vergusswanne 4 is partially filled with a translucent, the light-emitting diode chips 3 covering potting compound, which contains, for example, two different phosphors to convert the wavelength of a portion of the generated by the LED chips 3 electromagnetic radiation, so that the illumination device emits white light during their operation.
- phosphors are described, for example, in WO 98/12757.
- the light emitting diode chips 3 facing surface 4 a of the walls of the Vergusswanne 4 is formed so that they of the Vergusswanne 4 is formed so that they reflect the light emitted by the LED chips 3 electromagnetic radiation.
- the light-emitting diode chips 3 are, for example, thin-film light-emitting diode chips whose basic principle is described, for example, in the publication I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176.
- the term light-emitting diode also includes those diodes which emit during operation electromagnetic radiation from the ultraviolet or infrared wavelength range, which is converted by suitable conversion means into electromagnetic radiation from the visible wavelength range.
- the carrier plate 2 has four holes 22, in each of which a suitably matched thereto pin 52 of a serving to reduce the divergence of the light emitting diode chips 3 electromagnetic radiation primary optics 5 (shown in Figure 4) or a holder for the primary optics 5 engages.
- the primary optics 5 are fixed to the carrier plate 2 by means of the pins 52 and their mounting position and orientation relative to the carrier plate 2 and thus also with respect to the locking straps 17 to 19 are determined.
- the bores 22 are fittingly arranged on corresponding holes in the mounting surface 10 of thedekör- pers 1, so that the pins 52 of the primary optics 5 are passed through the holes 22 of the support plate 2 and engage in the aforementioned holes in the heat sink 1.
- the carrier plate 2 is also fixed and aligned on the heat sink 1 by means of the dowel pins 52.
- the support plate 2 In this case, no separate means for mounting on the mounting surface 10 of the heat sink 1 are required for the support plate 2.
- one or more spacers may be provided between the primary optics 5 and the support plate 2 or the mounting surface 10, which limit the penetration depth of the pins 52 in the holes 22.
- the primary optics is a composite optical concentrator which, similar to the optical concentrator 5 of the embodiment of the ErFm model shown in FIG. fertil is formed.
- This optical concentrator 5 engages in the Vergusswanne 4 and is optically coupled to the LED chips 3, for example by means of Canada balsam.
- the optical concentrator 5 concentrates the light generated by the light-emitting diode chips 3, so that it emerges from the end face 51 of the concentrator 5, which wall is remote from the light-emitting diode chips 3, with reduced divergence.
- the optical concentrator 5 is, for example, a compound parabolic concentrator (CPC) or a composite elliptical concentrator (CEC) or a composite hyperbolic concentrator (CHC).
- the primary optics 5 are arranged with respect to the LED chips 3 in a well-defined position and orientation on the heat sink 1 or on the carrier plate 2.
- the primary optics 5 is matched to the optics of the vehicle headlight (secondary optics).
- the electrical components required for the operation of the LED chips 3 are arranged on a mounting plate 6 designed as a lead frame.
- the assembled with the aforementioned electrical components (not shown) mounting plate 6 is a matching recess of the middle fin 14 is arranged and fixed.
- the mounted on the mounting plate 6 electrical components protrude into the space between the mounting plate 6 and the adjacent cooling fins 13 and / or 15.
- the electrical terminal 7 is formed as a socket with four contact pins 71, which is provided for receiving a connector adapted thereto. Two of the contact pins 71 serve to supply power to the light-emitting diode chips 3 connected in series, and two more of the contact pins 71 serve to supply voltage to a temperature sensor.
- FIG. 3 schematically shows a holder 30 for the exemplary embodiments of the illumination device according to the invention shown in FIGS. 1, 2, 5, 6, 7 and 8.
- This holder 30 is part of the vehicle headlight and is located, for example, on the rear side of the vehicle headlight reflector which faces away from the light exit opening of the vehicle headlight reflector.
- the edge of the mounting opening 300 is provided with matching recesses 301, 302, 303 for the locking tabs 17, 18, 19 of the lighting device.
- a stop 304 for the locking tab 19 and a ramp 305 are further arranged.
- the mounting opening 300 with the recesses 301 to 303 and the stop 304 and the ramp 305 together with the locking tabs 17 to 19 a bayonet between the illumination device and the holder 30 of the vehicle headlight.
- the lighting device With its mounting surface 10, which forms the projecting into the reflector of the vehicle headlight front of the lighting device, attached to the holder 30, wherein the locking tab 19 in the recess 303, the locking tab 17 in the recess 301 and the locking tab 18 engage in the recess 302 and the front 10 of the illumination device including the locking tabs 17 to 19 protrude through the mounting hole 300 so that the back of the holder 30 abuts the spring ring 101 on the heat sink 1.
- the illumination device is rotated relative to the section 30 by approximately one quarter turn, so that the locking tab 19 slides over the ramp 305 and bears against the stop 304.
- the stopper 304 prevents further rotational movement in the screwing direction.
- the ramp 305 complicates a rotational movement in the direction of rotation and prevents an automatic unlocking of the bayonet lock.
- the pressure spring 103 is in the region between the stopper 304 and the ramp 305 at the edge of the mounting hole 300 with a press fit. Due to the spring action of the pressure spring 103, the illumination device is pressed against the obliquely mutually extending edge regions 306, 307 of the mounting opening, so that the illumination device at three portions of the edge of the Mounting opening 300 is supported and thus secured against movement in the flange plane.
- the holder 30 or the edge of the mounting opening 300 is arranged in the locked state of the bayonet lock with a press fit between the locking tabs 17 to 19 and the spring ring 101.
- the three Verriegelungsla- see 17 to 19 lie in a common plane, which forms a reference plane for the alignment of the LED chips 3 and the primary optics 5 with respect to the reflector of the vehicle headlight. That is, the alignment of the LED chips 3 and the primary optics 5 on the heat sink 1 ensures, in conjunction with the above-described bayonet between the holder 30 and the lighting device according to the invention a clearly defined mounting position of the light source or light sources in the vehicle headlight.
- FIG. 4 shows a lighting device according to a second exemplary embodiment of the invention.
- This illumination device has a heat sink 400 with a circular-disk-shaped mounting surface 401 and cooling fins 402 running parallel, which extend perpendicular to the mounting surface 401.
- the heat sink 400 is formed as a one-piece die-cast aluminum part.
- the outer contour of the heat sink 400 substantially corresponds to that of a circular cylinder, apart from the cavities between the cooling fins 402.
- three recesses 403 are arranged on the mounting surface 401 in the surface of the heat sink 400 at an angular distance of 120 degrees. These recesses 403 are part of a bayonet closure between the lighting device and the vehicle headlight, in which the lighting device is used.
- One of the three recesses 403 has a shape that deviates from the shape of the other two recesses 403 to set a unique mounting position in a holder of the vehicle headlamp for the lighting device.
- the carrier plates 404, 405, 406 are arranged in a row, so that a total of fifteen light-emitting diode chips are arranged in a row on the front side 401 of the heat sink 400.
- the two outer support plates 404, 406 are each mounted on a slope of the mounting surface 401 of the heat sink 400.
- the LED chips are, as in the 1 is arranged in a Vergusswanne 407 and are hidden in the representation of Figure 4 by the primary optics 5 ( Figure 1).
- the primary optics 5 has a plurality of molded pins or dowel pins 52, by means of which it is anchored in holes in the heat sink 400.
- the primary optics 5 engages in the Vergusswannen 407, is optically coupled to the arranged in the Vergusswannen 407 LED chips and their spatial position and orientation is adjusted by means of the pins or dowel pins 52 with respect to the support plates 404-406.
- the light generated by the LEDs exits the light exit opening 51 of the primary optics 5 with reduced divergence.
- the electrical components for operating the light-emitting diode chips are mounted on a mounting plate 408 designed as a lead frame, which is arranged in a recess of the heat sink 400 in the region of the mounting surface 401.
- the mounting plate 408 covers the aforementioned recess in the heat sink 400. It is practically designed as a cover for this recess.
- the electrical components are mounted on the underside of the mounting plate 408, so that the electrical components protrude into the recess. In the illustration of Figure 4, the top of the mounting plate 408 is visible. The depth of the aforementioned recess is matched to the height of the mounted on the mounting board 408 electrical components.
- a second recess on the edge of the mounting surface 401 designed as a socket 409 electrical connection of the lighting device is arranged. Via the contact pins of the socket 409, the electrical components mounted on the mounting plate 408 are supplied with electrical energy.
- the circuit arrangement formed by the electrical components on the mounting plate 408 serves to power the LED chips.
- electrical contacts 410 are provided for contacting the light-emitting diode chips arranged on the support plates 404 to 406.
- the primary optics 5 of the illumination device is tuned to the downstream secondary optics of the vehicle headlight.
- the secondary optics can be a reflector, for example a free-form surface reflector, an optical lens system or a combination of an optical lens system with a reflector.
- FIGS. 5 and 6 show a third exemplary embodiment of the illumination device according to the invention. This illumination device is largely identical to the illumination device according to the first exemplary embodiment, which is depicted in FIGS. 1 and 2. Therefore, the same reference numerals are used in the corresponding Figures 1 and 2 and 5 and 6 for identical parts of the two embodiments. For the description of these parts, reference is made to the description of the corresponding parts of the first embodiment.
- the illumination device according to the third embodiment differs from that according to the first embodiment only by the different design of the electrical connection T.
- the electrical connection 7 'of the illumination device is mounted on the mounting plate 6. It has four metallic contact webs 71 ', which are arranged in the cavity between the cooling ribs 13 and 14 and extend in the radial direction of the substantially circular-cylindrical heat sink 1. In particular, the contact webs 71 'extend parallel to the cooling ribs 11 to 16 and project beyond the cooling ribs 11 to 16, so that the free ends of the contact webs 71' protrude from the heat sink 1.
- the illumination device according to the fourth embodiment of the invention is shown in a sectional side view.
- This lighting device is largely the same as that of the first embodiment. It differs only from the first embodiment that the heat sink 700 has no molded-on locking tabs, but instead a fastening ring 706 is provided, which is equipped with the three locking tabs 710 of the bayonet closure.
- One of the three locking tabs 710 has the same shape as the locking tab 19 shown in FIG.
- the other two locking tabs 710 have the shape of the locking tabs 17 and 18 shown in FIG.
- the heat sink 700 is made of a metal of high thermal conductivity, for example of an aluminum die-cast part, and has a plurality of cooling fins 701 and a circular cylindrical portion 702, to which the fastening ring is fixed by means of three, along the ring circumference uniformly distributed welding flaps 707.
- the fastening ring 706 is made, for example, of plastic, in which one end of the welding straps 707 is embedded, while the other end of the welding straps 707 is welded to the circular-cylindrical section 702 of the cooling body 700.
- the fastening ring 706 is further provided with a spring ring 709 and a lateral pressure spring 708, which perform the same function as the spring ring 101 shown in Figure 5 and the pressure spring f ⁇ 3.
- a support plate 704 with light-emitting diode chips 703 and a surrounding the LED chips 703 Vergusswanne 705 are arranged on the mounting surface of the heat sink 700.
- a primary optics 5 (shown in FIG. 4) is also arranged above the light-emitting diode chips 703 on the heat sink 700, which is optically coupled to the light-emitting diode chips 703.
- the fixing ring 706 offers, as already explained above, additional adjustment possibilities. After the adjustment, the fastening ring 706 is fixed in the desired position and orientation by welding the welding lugs 707 to the circular-cylindrical heat sink section 702.
- the lighting device according to the fifth embodiment of the invention is shown in a sectional side view.
- This lighting device is largely the same as that of the fourth embodiment. It differs from the fourth embodiment only by the manner of fixing the mounting ring 806 on the heat sink 800.
- the heat sink 800 is made of a metal of high thermal conductivity, for example, an aluminum diecast part, and has a plurality of cooling fins 801 and a circular cylindrical portion 802 on which the fastening ring 806 with the aid of a tallringes 807a, which is embedded in the plastic fastening ring 806, and a plastic ring 807b, which is arranged in an annular groove on the circular-cylindrical heat sink section 802, is fixed.
- a current flow is induced by the electromagnetic induction after adjustment in the metal ring 807a, which heats the metal ring 807a so that the plastic ring 807b resting against it melts.
- the current flow is maintained only for a short time, so that the plastic of the plastic ring 807b immediately solidifies again and then produces a positive connection between the fastening ring 806 and the heat sink section 802.
- the mounting ring 806 is equipped with the three locking tabs 810 of the bayonet fitting.
- One of the three locking tabs 810 has the same shape as the Verriegehmgslasche 19 shown in Figure 1, while the other two locking tabs 810 have the shape of the locking tabs 17 and 18 shown in Figure 1.
- the three locking tabs 810 of the mounting ring 806, together with the matching recesses 301 to 303 at the edge of the mounting hole 300 of the holder 30 shown in Figure 3 a bayonet lock.
- the fastening ring 806 is further equipped with a spring ring 809 and a lateral pressure spring, which perform the same function as the spring ring 101 shown in Figure 5 and the pressure spring 103.
- a support plate 804 with light-emitting diode chips 803 and a surrounding the light-emitting diode chips 803 Vergusswanne 805 are arranged on the mounting surface of the heat sink 800.
- a primary optics 5 (shown in FIG. 4) are also arranged on the heat sink 800 via the light-emitting diode chips 803, which is optically coupled to the light-emitting diode chips 803.
- the fastening ring 806 offers, as already explained above, additional adjustment possibilities.
- light-emitting diodes emitting infrared radiation can also be used in order to use such an illumination device, for example for generating an infrared high-beam light, in a vehicle headlight.
- You can also use colored light emitting LEDs are used to use the lighting device as a light source in rear lights of the vehicle, for example, as a return, brake or flashing light, etc.
- the illumination device according to the invention can also be used as a light source in other luminaires which require an adjustment of the light source with respect to an optical system of the luminaire.
- the locking tabs may not necessarily be disposed in a common plane, as described in the preferred embodiments. Instead, they can also be arranged in different planes in order, for example, to be able to easily encode different types of lighting devices.
- the number and shape of the locking tabs can also be varied to allow coding of different types of lighting devices.
- the aforementioned coding can also be ensured by different shape and spatial arrangement of the contact webs 71 or 71 'of the electrical connection 7 or T.
- the cooling of the illumination device according to the invention or of the vehicle headlight according to the invention can be assisted, for example, with the aid of a fan or blower.
- the illumination device according to the invention or the vehicle headlight according to the invention may additionally or instead also comprise a Peltier element for supporting the cooling, whose cold surface is thermally coupled, for example, to the carrier plate of the light-emitting diode chips and whose warm surface is thermally coupled to the heat sink. This allows a smaller heat sink to be used.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004062990A DE102004062990A1 (de) | 2004-12-22 | 2004-12-22 | Beleuchtungseinrichtung mit mindestens einer Leuchtdiode und Fahrzeugscheinwerfer |
PCT/DE2005/002169 WO2006066530A1 (de) | 2004-12-22 | 2005-12-01 | Beleuchtungseinrichtung mit mindestens einer leuchtdiode und fahrzeugscheinwerfer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1828671A1 true EP1828671A1 (de) | 2007-09-05 |
EP1828671B1 EP1828671B1 (de) | 2015-07-15 |
Family
ID=35874379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05822978.2A Active EP1828671B1 (de) | 2004-12-22 | 2005-12-01 | Beleuchtungseinrichtung mit mindestens einer leuchtdiode und fahrzeugscheinwerfer |
Country Status (7)
Country | Link |
---|---|
US (1) | US7621667B2 (de) |
EP (1) | EP1828671B1 (de) |
JP (1) | JP4778523B2 (de) |
CN (1) | CN101087976B (de) |
DE (1) | DE102004062990A1 (de) |
TW (1) | TWI358512B (de) |
WO (1) | WO2006066530A1 (de) |
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-
2005
- 2005-12-01 JP JP2007547156A patent/JP4778523B2/ja active Active
- 2005-12-01 EP EP05822978.2A patent/EP1828671B1/de active Active
- 2005-12-01 US US11/666,455 patent/US7621667B2/en active Active
- 2005-12-01 WO PCT/DE2005/002169 patent/WO2006066530A1/de active Application Filing
- 2005-12-01 CN CN2005800441643A patent/CN101087976B/zh active Active
- 2005-12-20 TW TW094145263A patent/TWI358512B/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO2006066530A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101087976A (zh) | 2007-12-12 |
TW200632248A (en) | 2006-09-16 |
DE102004062990A1 (de) | 2006-07-06 |
CN101087976B (zh) | 2010-06-16 |
WO2006066530A1 (de) | 2006-06-29 |
JP2008524862A (ja) | 2008-07-10 |
US20080117647A1 (en) | 2008-05-22 |
TWI358512B (en) | 2012-02-21 |
EP1828671B1 (de) | 2015-07-15 |
US7621667B2 (en) | 2009-11-24 |
JP4778523B2 (ja) | 2011-09-21 |
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