EP2341512B1 - Lamp à décharge gazeuse integrée - Google Patents

Lamp à décharge gazeuse integrée Download PDF

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Publication number
EP2341512B1
EP2341512B1 EP10014656A EP10014656A EP2341512B1 EP 2341512 B1 EP2341512 B1 EP 2341512B1 EP 10014656 A EP10014656 A EP 10014656A EP 10014656 A EP10014656 A EP 10014656A EP 2341512 B1 EP2341512 B1 EP 2341512B1
Authority
EP
European Patent Office
Prior art keywords
light source
housing
control module
module
burner
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.)
Not-in-force
Application number
EP10014656A
Other languages
German (de)
English (en)
Other versions
EP2341512A1 (fr
Inventor
Christian Johann
Lars Dabringhausen
Thomas Jaiser
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2341512A1 publication Critical patent/EP2341512A1/fr
Application granted granted Critical
Publication of EP2341512B1 publication Critical patent/EP2341512B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • 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
    • F21S41/17—Discharge 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the present invention relates to a light source with a gas discharge lamp.
  • the light source comprises a control module with a driver circuit, an ignition module for generating a high voltage and a gas-filled burner, in which an arc is ignited and maintained between two electrodes.
  • the invention also relates to a lighting device for a motor vehicle with such a light source.
  • a light source of the type mentioned is for example from the WO 2004/083900 A1 , of the EP 1 273 848 A1 or the WO 2004/084250 A1 known.
  • a noble gas or a gas mixture is contained in a burner, which can also be referred to as a discharge vessel or inner bulb. Between two protruding into the interior of the burner electrodes is a voltage is applied so that an arc is formed between the electrodes, which leads to a light emission, and the arc can be maintained during the operation of the light source.
  • a driver circuit of a control module or a control unit of the gas discharge lamp from the battery voltage of 12 V or 24 V generates an intermediate voltage of a few 100 V to over 1000 V, for example. About 1200 V, between two potentials of -700 V and +500 V. issue.
  • an ignition module of the gas discharge lamp generates an ignition voltage (high voltage) for the burner, which can be several kilovolts, for example in the range between 10 kV and 25 kV, in particular in the range of 23 kV.
  • the ignition voltage is applied to the electrodes.
  • the voltage applied to the electrodes can be reduced to an operating voltage (AC) of only a few volts, for example to a voltage of 43 V or 85 V at 400 Hz.
  • the operating voltage is supplied by a driver circuit of the control module.
  • the ignition voltage is preferably generated by stepping up the operating voltage.
  • the control module is arranged separately and spatially separated from the burner.
  • the ignition module is integrated in the known light sources either in the control module or arranged directly on the burner and / or a base of the gas discharge lamp.
  • the operating voltage generated by the control module is conducted via a shielded line to the burner or to the ignition module and applied to the electrodes.
  • the decentralized arrangement of the control module has in the known gas discharge lamps especially thermal reasons.
  • the driver circuit formed in the control module comprises a plurality of electronic components which generate a considerable amount of heat during operation of the light source. This can be better dissipated at a distance to the burner, at lower ambient temperatures.
  • the ignited and maintained in the interior of the burner arc generated very high temperatures, which are in the range of several 100 ° C and can even reach 1,000 ° C or more. These high temperatures would lead to impairment or even damage to the driver circuit or their electronic components, if the control module would be located in close proximity to the burner.
  • a disadvantage of the known light sources is the relatively large space requirement due to the separate and spatially separated from the rest of the light source control module.
  • the required shielded connection line between the control module and the remaining light source (burner or ignition module) for additional costs and increased effort during assembly. Due to the transmitted via the connecting line AC signals and the electromagnetic radiation caused thereby, it is necessary that the connecting line is well shielded against electromagnetic radiation. This is done, for example, by a metal mesh or metal-plastic braid surrounding the connecting line. However, this braid must meet a variety of requirements, which leads to relatively high costs for the shielded connection line.
  • the mesh must be designed to be flexible so that a relative movement of the burner relative to the light source Control module through the shielded connection line is not or not significantly affected. Otherwise, a reliable movement, in particular a uniform movement, of the light module can not be ensured or it requires particularly strong forces and particularly large and heavy drive units.
  • the present invention has the object, a light source comprising a gas discharge lamp compact as possible, small-sized, easy to handle and inexpensive to design.
  • control module the ignition module and the burner are mounted on a common carrier system and combined into one unit.
  • the control module in the vicinity of the burner namely arranged on a common carrier system of the light source.
  • the gas discharge lamp has a lower power and thus also a lower heat development during operation than conventional gas discharge lamps previously used in motor vehicle lighting devices.
  • the gas discharge lamp of the light source according to the invention has a reduced by about 20% to 30% compared to conventional gas discharge lamps electrical power.
  • the gas discharge lamp of the light source according to the invention has a power of about 25 watts, for example.
  • the reduced power results in lower arc temperatures, significantly less waste heat, and the power loss of the control module also decreases.
  • the reduced luminous flux due to the reduced power does not necessarily lead to a poorer illumination of the road or other areas in front of the motor vehicle. Rather, it is possible to achieve an illumination comparable to more powerful conventional gas discharge lamps by optimizing the other components of the motor vehicle lighting device equipped with the power-reduced gas discharge lamp.
  • the components of the illumination device to be optimized include, for example, a primary optic (for example a reflector), a secondary optic (for example a projection lens), a cover plate of a housing and any other components of the illumination device influencing the light distribution.
  • the reduced power of the gas discharge lamp causes the gas discharge lamp to generate significantly less waste heat during operation than conventional gas discharge lamps. Only then is it possible to fasten the control module in the vicinity of the burner to a common carrier system without the control module or its driver circuit or the electronic components being restricted in their function or even being damaged.
  • An advantage of the light source according to the invention is that no separate, separate from the rest of the gas discharge lamp control module, for example in the form of a Control unit with its own control unit housing, is present, which must be arranged in the vehicle.
  • the control module, ignition module and burner to form a common unit, the connecting lines between the control module and the burner or ignition module.
  • the individual modules of the light source namely control module, ignition module and burner, can be manufactured as separate modules and tested individually. In the final manufacturing process, all modules are then mounted in or on the common carrier system. In this way, it would also be possible, for example, to combine different modules to different light sources for different applications and customer requirements, without each requiring a complete redevelopment of a light source. Instead, a new light source can be assembled from proven modules that have already been individually tested. This can significantly reduce development time and costs.
  • the carrier system comprises a housing, in particular a metal housing.
  • the housing is preferably made of a metal sheet, in particular an aluminum sheet, bent or as a metal die-cast housing, in particular die-cast aluminum, formed.
  • the control module and the ignition module are in a common housing of the carrier system arranged.
  • the burner would be attached to the housing via the ignition module, with leads or wires connecting the electrodes of the burner to the interior of the housing and the control module or ignition module disposed therein.
  • the housing can also fulfill the functions of protection against moisture, dirt and mechanical stress, heat dissipation (cooling or cooling) and EMC shielding.
  • the carrier system thus not only serves to attach the control module, ignition module and burner, but at the same time as a housing, heat sink and EMC shielding.
  • the housing has means for increasing a heat release to the environment.
  • the housing may, for example, be equipped with cooling fins or cooling pins or other elements which increase the surface which can be used for heat dissipation.
  • the surface of the housing has a high emissivity of, for example,> 0.7, in particular of> 0.9.
  • the emissivity of a body indicates how much radiation it emits in comparison to an ideal heat radiator, a so-called black body.
  • emissivities such as a directional spectral emissivity, a hemispherical spectral emissivity, a directional total emissivity, or a hemispherical total emissivity.
  • emissivity is understood to mean the total hemispheric emissivity. This is according to the present embodiment above 0.7, in particular above 0.9.
  • the emissivity of the housing can by a suitable surface treatment can be improved. To improve the emissivity of the housing, this can be painted with suitable paints, for example.
  • the paints should behave in the infrared wavelength range ideally as a "black spotlight", the paints should therefore absorb the heat radiation as completely as possible and release it to the environment.
  • Decisive in this embodiment is that the emissivity of the surface of the housing by suitable treatment is greater than the corresponding untreated surface (base material).
  • Untreated, aluminum has an emissivity of approx. 0.15.
  • an emissivity of approximately 0.7 may already be sufficient, but it is preferably above 0.9.
  • modules of the light source in the upper region of the carrier system, which can endure high temperatures without impairment of function or the risk of damage.
  • the ignition module or the electrical circuit of the ignition module at the top of the carrier system.
  • Modules that can not be subjected to high thermal loads should be mounted as low as possible on the carrier system.
  • a plug of the control module or ignition module should be arranged as far down as possible on the carrier system. The plug can also be arranged outside the housing.
  • the present invention also includes automotive lighting devices having at least one light source according to the invention.
  • the lighting device is preferably as a motor vehicle headlight educated.
  • a lighting device for motor vehicles is designated in its entirety by the reference numeral 1.
  • the lighting device 1 is formed in the illustrated embodiment as a motor vehicle headlight.
  • the lighting device 1 may also be designed as a light or the like.
  • the headlight 1 comprises a housing 2, which is preferably made of plastic.
  • the headlight housing 2 has a light exit opening, which is closed by a transparent cover 4.
  • the cover 4 is made of colorless plastic or glass.
  • the disk 4 may be formed as a so-called clear disk without optically effective profiles (for example, prisms). Alternatively, the disc 4 may be provided at least partially with optically effective profiles.
  • the light modules 5, 6 are arranged inside the headlight housing 2 movable.
  • the light modules 5, 6 are to produce a desired light distribution, such as a low beam, a high beam, a city light, a highway, a motorway light, a fog light, a static or dynamic Kurvenlicht- or any other static and / or or adaptive light distribution formed.
  • the light modules 5, 6 generate the desired light function either alone or in combination with each other by the light module 5 of each individual light module; 6 supplied partial light distributions are superimposed to the desired light distribution.
  • the light modules 5, 6 can be designed as a reflection module and / or as a projection module. Of course, more or less than the two illustrated light modules 5, 6 may be provided in the headlight housing 2.
  • the light module 5, 6 off FIG. 2 is designed as a projection module. It comprises a light source 7 which emits electromagnetic radiation, preferably light visible to the human eye.
  • the light module 5, 6 comprises a primary optics 8 in the form of a reflector for bundling the emitted light.
  • the light source 7 is of the Rear side of the reflector 8 ago introduced into a receiving opening formed in the apex of the reflector 8 and fixed there, for example, bayonet.
  • a lamp base 9 is provided on the light source 7.
  • the light emitted by the light source 7 and focused by the reflector 8 light is imaged by a secondary optics 10, which is formed for example as a projection lens, on the roadway in front of the motor vehicle.
  • the lens 10 is fixed by means of a lens holder 11 at the front edge of the reflector 8. If the light distribution to be generated by the light module 5, 6 has a horizontal light-dark boundary (for example in the case of a low-beam distribution or a fog light distribution), a diaphragm arrangement 12 is arranged between the primary optics 8 and the secondary optics 10, the upper edge 13 of which is projected from the projection lens 10 as a light-dark boundary Roadway is projected in front of the motor vehicle.
  • the course of the upper edge 13 of the diaphragm arrangement 12 can be varied to produce a variable or adaptive light distribution.
  • the diaphragm arrangement 12 in its entirety is pivotable about an axis of rotation 15 which is at a distance from an optical axis 14 of the light module 5, 6 and extending transversely thereto. In this way, the diaphragm 12 can be moved out of or out of the beam path, and the light distribution emitted by the light module 5, 6 can be switched between a dimmed light distribution (for example low beam) and a non-dimmed light distribution (for example high beam).
  • a dimmed light distribution for example low beam
  • a non-dimmed light distribution for example high beam
  • the light source used in the light module 5, 6 7 is in detail in FIG. 3 shown.
  • the light source 7 comprises a gas discharge lamp and a control module 16 with a driver circuit for generating an intermediate voltage or an operating voltage for the gas discharge lamp, an ignition module 17 for generating a high voltage (ignition voltage) from the intermediate voltage and a gas-filled burner 18.
  • the burner 18 is preferably with filled with a noble gas or gas mixture. In the burner 18 protrude two electrodes 19, 20, between which an arc is ignited for the operation of the light source 7 and maintained for the duration of the operation of the light source 7.
  • the gas-filled burner 18 (so-called inner glass bulb) is in turn arranged inside a preferably air-filled glass bulb 24 (so-called outer glass bulb).
  • Both the burner 18 and the glass bulb 24 are preferably made of a quartz glass.
  • the lines 25, 26 are guided through the base 9 in the interior of the housing 21 and there connected to the control module 16 and / or the ignition module 17.
  • control module 16, the ignition module 17 and the burner 18 are attached to a common carrier system 21 and combined into one unit.
  • the support system 21 in addition to the attachment of the sub-components 16, 17 and the functions of a housing for the electrical circuits of the control module 16 and the ignition module 17 and the function of a heat sink, on the waste heat of the electronic components of the control module 16 and / or the ignition module 17th is delivered to the environment.
  • the housing 21 protects the circuits or electronic components of the control module 16 and the ignition module 17 from dirt, moisture and mechanical damage.
  • the housing 21 provides an EMC shield so that electromagnetic interference from outside does not affect the circuits or electronic components of the control module 16 and the ignition module 17 and on the other hand, electromagnetic interference of the circuits or electronic components of the control module 16 and the ignition module 17 not on outside circuits and components act.
  • the electronic components of the circuits of the control module 16 and the ignition module 17 are arranged on one or more printed circuit boards 22, mechanically fixed and electrically contacted. About formed on the circuit board 22 traces, the two modules 16, 17 with each other and with other components for power supply and / or signal transmission in electrical connection.
  • the other components are, for example, a plug or socket element 23, which is formed on the underside of the printed circuit board 22 and protrudes through an opening in the housing 21 to the outside.
  • a corresponding socket or plug element in FIG.
  • a connecting line via which the light source 7 and the control module 16 and the ignition module 17 with a higher-level control unit, for example, a so-called body controller, as well as for power to a power supply, such as a motor vehicle battery, in communication.
  • a higher-level control unit for example, a so-called body controller
  • the control module 16 it is possible for the first time to place the control module 16 in the immediate vicinity of the light source To position burner 18 without causing thermal problems or overheating of the electronic components of the control module 16. This is made possible by the fact that the burner 18 has a reduced lamp power compared to conventional gas discharge lamps.
  • the high packing density of the light source 7 according to the invention is possible because the reduced power of the light source 7 makes thermal management manageable from an economic point of view.
  • the various subcomponents of the light source 7 according to the invention, namely the control module 16, the ignition module 17 and the burner 18, can be manufactured and tested as separate modules. In the final manufacturing process then all required modules are mounted in the common carrier system 21.
  • the light source 7 allows a particularly compact construction of a gas discharge lamp. Due to the small size, it is recommended for cooling to increase the proportion of radiated heat energy by appropriate measures. For this purpose, it is possible to carry out the surface of the housing 21 with a particularly high emissivity (for example 0.9).
  • the particularly high emissivity can be achieved, for example, by painting the housing 21 with suitable paints. The paints must behave in the infrared range ideally like a "black spotlight".

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (8)

  1. Source de lumière (7) ayant une lampe à décharge gazeuse, comprenant
    - un module de commande (16) muni d'un montage de commutation,
    - un module d'allumage (17) pour produire une haute tension, ainsi que
    - un brûleur rempli de gaz (18), dans lequel entre deux électrodes (19, 20) un arc lumineux est allumé et maintenu,
    tandis que le module de commande (16), le module d'allumage (17) et le brûleur (18) sont fixés à un système de support commun (21) et sont réunis en une unité, caractérisée en ce que la source de lumière (7) présente un culot (9), qui est conçu de telle manière que la source de lumière (7) est apte à être fixée par baïonnette par l'intermédiaire du culot (9) dans un orifice d'accueil formé sur une face postérieure d'un réflecteur (8).
  2. Source de lumière (7) selon la revendication 1, caractérisée en ce que le système de support comprend un boîtier, en particulier un boîtier métallique.
  3. Source de lumière (7) selon la revendication 2, caractérisée en ce que le boîtier présente des moyens pour augmenter un dégagement de chaleur dans l'environnement.
  4. Source de lumière (7) selon la revendication 2 ou 3, caractérisée en ce que la surface du boîtier présente un coefficient d'émission supérieur à 0,7, en particulier supérieur à 0,9.
  5. Source de lumière (7) selon l'une des revendications 1 à 4, caractérisée en ce que la surface du boîtier est vernie.
  6. Source de lumière (7) selon l'une des revendications 1 à 5, caractérisée en ce que le module d'allumage est disposé, dans la source de lumière se trouvant en position de fonctionnement, au-dessus du module de commande et/ou du brûleur, dans le système de support.
  7. Dispositif d'éclairage (1) pour un véhicule automobile, comprenant au moins une source de lumière (7) selon l'une des revendications 1 à 6.
  8. Dispositif d'éclairage (1) selon la revendication 7, caractérisé en ce que le dispositif d'éclairage (1) est configuré comme un projecteur de véhicule automobile.
EP10014656A 2009-12-22 2010-11-16 Lamp à décharge gazeuse integrée Not-in-force EP2341512B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060778 2009-12-22
DE102010019679A DE102010019679A1 (de) 2009-12-22 2010-05-07 Lichtquelle mit einer Gasentladungslampe und Beleuchtungseinrichtung für ein Kraftfahrzeug mit einer solchen Lichtquelle

Publications (2)

Publication Number Publication Date
EP2341512A1 EP2341512A1 (fr) 2011-07-06
EP2341512B1 true EP2341512B1 (fr) 2013-03-27

Family

ID=43929120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10014656A Not-in-force EP2341512B1 (fr) 2009-12-22 2010-11-16 Lamp à décharge gazeuse integrée

Country Status (4)

Country Link
US (1) US9431204B2 (fr)
EP (1) EP2341512B1 (fr)
CN (1) CN102102839B (fr)
DE (1) DE102010019679A1 (fr)

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Also Published As

Publication number Publication date
CN102102839B (zh) 2015-02-18
US9431204B2 (en) 2016-08-30
CN102102839A (zh) 2011-06-22
US20110148299A1 (en) 2011-06-23
DE102010019679A1 (de) 2011-06-30
EP2341512A1 (fr) 2011-07-06

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