EP3525552B1 - Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule - Google Patents

Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule Download PDF

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Publication number
EP3525552B1
EP3525552B1 EP18155962.6A EP18155962A EP3525552B1 EP 3525552 B1 EP3525552 B1 EP 3525552B1 EP 18155962 A EP18155962 A EP 18155962A EP 3525552 B1 EP3525552 B1 EP 3525552B1
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EP
European Patent Office
Prior art keywords
luminous
circuit arrangement
parallel
strings
string
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.)
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Application number
EP18155962.6A
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German (de)
English (en)
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EP3525552A1 (fr
Inventor
Christian Guth
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.)
ZKW Group GmbH
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ZKW Group GmbH
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Publication date
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Priority to EP18155962.6A priority Critical patent/EP3525552B1/fr
Priority to CN201910103130.0A priority patent/CN110139421A/zh
Publication of EP3525552A1 publication Critical patent/EP3525552A1/fr
Application granted granted Critical
Publication of EP3525552B1 publication Critical patent/EP3525552B1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Definitions

  • the invention relates to a circuit arrangement for alternately switching on and off at least two lighting strands connected electrically in parallel for a vehicle headlight, comprising a parallel circuit, having at least two lighting strands connected electrically in parallel, each lighting strand consisting of a number of light sources electrically connected in series with one another, at least one energy source for supplying the parallel circuit, wherein a first of the at least two electrically parallel-connected lighting strands has a working area with a lower voltage limit and an upper voltage limit for operating the first lighting strand, and wherein a second of the at least two electrically parallel-connected lighting strands has a working area with a lower voltage limit and an upper voltage limit Operation of the second lighting strand, the upper voltage limit of the first lighting strand being below the lower voltage limit of the second lighting strand, the first lighting strand being connected in series with a switching element.
  • Circuit arrangements for switching lighting strands on and off alternately are from the documents EP 3 193 564 A1 as well as US 2018/014368 A1
  • the invention further relates to a lighting device with a circuit arrangement according to the invention and a vehicle headlight with a lighting device according to the invention.
  • An object of the invention is therefore to create a reliable and cost-effective circuit arrangement which makes it possible to effect a change in the operation of at least two strands based on the presence of only a single switching signal.
  • a number of means a number which can be, for example, one, two, three, four or more, in particular six, eight, ten, twelve or more than twelve.
  • the person skilled in the art is able to select the number of respective light sources in accordance with the intended use of the circuit arrangement.
  • all light sources of the LED lighting strands are identical in construction and in particular are equipped with a fixed forward voltage.
  • the number of LEDs connected in series in the lighting strands differs from one another, and in particular it can be provided that the LEDs of all lighting strands are identical in construction. In this way, lighting strands can be created in a very efficient and simple manner that have different working areas in terms of their operating voltage.
  • the number of LEDs connected in series in the at least two lighting strands is the same, with the forward voltages of the LEDs of the two lighting strands differing from one another, in such a way that the upper voltage limit of the first lighting strand is below the lower voltage limit of the second light strand.
  • the energy source is a constant current source.
  • the strings can have the same rated current, and the output current of the constant current source can be rated current, so that only one string can be supplied at a time.
  • the switching element is a relay or a transistor, in particular a MOSFET or a bipolar transistor.
  • the switching voltage of the switching element is between 5 V and 24 V.
  • the voltage provided by the energy source in the parallel connection is between 2 and 60 V, in particular between 5 and 24 V. This operating range is particularly advantageous for use in the automotive sector.
  • the invention further relates to a lighting device, comprising at least one circuit arrangement according to the invention, and to a vehicle headlight, in particular a motor vehicle headlight, comprising a lighting device according to the invention.
  • Figure 1 a schematic representation of a circuit arrangement according to the invention.
  • Figure 1 shows a circuit arrangement 1 according to the invention.
  • the circuit arrangement 1 is set up and includes for the alternating switching on and off of at least two lighting strands 2 and 3 connected electrically in parallel for a vehicle headlight a parallel circuit 4, having at least two lighting strands electrically connected in parallel, namely a first lighting strand 2 and a second lighting strand 3, and at least one energy source 5 for supplying the parallel circuit 4.
  • the first lighting strand 2 has a working area with a lower voltage limit and an upper voltage limit for operating the first lighting strand, which are given by the sums of the lower voltage limits or upper voltage limits of the light sources 7 connected in series in the strand, which can in particular be designed as LEDs.
  • the second lighting strand 3 has an increased number of light sources compared to the first lighting strand 2 and thus the lower and upper voltage limits for operating the second lighting strand 3 are correspondingly higher than in the first lighting strand 2.
  • the number and voltage values of the lamps are selected so that the lower voltage limit of the second lighting strand 3 is above the upper voltage limit of the first lighting strand 2.
  • the first lighting strand 2 is connected in series with a switching element 6, which is designed to be switched between an electrically conductive and an electrically blocking state via an external switching signal S ext .
  • the parallel circuit 4 is connected to the energy source 5 in such a way and/or the energy source 5 is designed in such a way that when the switching element 6 is in a conductive state, the voltage U p applied to the parallel circuit 4 lies within the working range of the first lighting strand 2 and thereby the first lighting strand 2 is switched on and the second lighting strand 3 is switched off, and that in a non-conducting state of the switching element 6, the voltage Up applied to the parallel circuit 4 is raised towards the working range of the second lighting strand 3 and thus the first lighting strand 2 is switched off and the second lighting strand 3 is switched on .
  • the total forward voltage i.e.
  • the working range of the first lighting strand 2 can be between 13.5 V and 17.5 V (the lower voltage limit here is therefore 13.5 V and the upper voltage limit is therefore 17, 5 V) and when using ten LED light sources in the second lighting strand 3, the working range of the second lighting strand is between 27 V and 35V (the lower voltage limit here is therefore 27 V and the upper voltage limit is therefore 35 V).
  • switching the switching element 6 through causes the voltage of the constant current source to adjust in such a way that the rated current flows into the first strand 2.
  • the voltage will therefore be between 13.5 V and 17.5 V and will not exceed this value since the nominal current I N is already flowing. Only when the switching element 6 is switched off will it interrupt the connection to the first lighting strand 2, whereby the voltage Up is increased until the rated current I N flows through the second strand 3.
  • the voltage Up is now within the working range of the second lighting strand 3.

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (11)

  1. Circuit (1) pour l'allumage et l'extinction alternés d'au moins deux chaînes lumineux montés électriquement en parallèle pour un phare de véhicule, comprenant
    - un circuit parallèle, présentant au moins deux chaînes lumineuses montés électriquement en parallèle, chaque chaîne lumineux étant constitué d'un certain nombre de sources lumineuses (7) montées électriquement en série les unes avec les autres,
    - au moins une source d'énergie (5) pour alimenter le circuit parallèle (4),
    un premier (2) des au moins deux chaînes lumineux (2, 3) montés électriquement en parallèle présentant une zone de travail avec une limite inférieure de tension et une limite supérieure de tension pour le fonctionnement du premier chaîne lumineux (2),
    et un deuxième (3) des au moins deux chaînes lumineux (2, 3) montés électriquement en parallèle présentant une zone de travail avec une limite inférieure de tension et une limite supérieure de tension pour le fonctionnement du deuxième chaîne lumineux (3), la limite supérieure de tension du premier chaîne lumineux (2) étant inférieure à la limite inférieure de tension du deuxième chaîne lumineux (3), la première chaîne lumineuse étant connectée en série avec un élément de commutation (6), le circuit (1) étant conçu pour provoquer un changement de fonctionnement d'au moins deux chaînes (2, 3) à l'aide d'un seul signal de commutation externe (Sext), le circuit parallèle (4) étant connecté à la source d'énergie (5) et/ou la source d'énergie (5) étant conçue de telle sorte,
    - en ce que, dans un état conducteur de l'élément de commutation (6), la tension appliquée au circuit parallèle (4) se situe à l'intérieur de la plage de fonctionnement du premier chaîne lumineux (2) et que, de ce fait, le premier chaîne lumineux (2) est allumé et le deuxième chaîne lumineux (3) est éteint, et
    - en ce que, dans un état non conducteur de l'élément de commutation (6), la tension appliquée au circuit parallèle (4) est augmentée jusqu'à la zone de travail du deuxième cordon lumineux (3) et ainsi le premier cordon lumineux (2) est éteint et le deuxième cordon lumineux (3) est allumé.
  2. Circuit (1) selon la revendication 1, dans lequel toutes les sources lumineuses (7) des branches lumineuses sont des LED.
  3. Circuit (1) selon la revendication 2, dans lequel les LED de tous les chaînes lumineux (2, 3) sont de construction identique.
  4. Circuit (1) selon la revendication 2 ou 3, dans lequel le nombre de LED montées en série dans les branches lumineuses (2, 3) diffère.
  5. Circuit (1) selon la revendication 2, dans lequel le nombre de DEL montées en série dans les au moins deux branches lumineuses (2, 3) est identique, les tensions directes des DEL des deux branches lumineuses (2, 3) différant les unes des autres.
  6. Circuit (1) selon l'une des revendications précédentes, dans lequel la source d'énergie (5) est une source de courant constant.
  7. Circuit (1) selon l'une des revendications précédentes, dans lequel l'élément de commutation (6) est un relais ou un transistor, en particulier un transistor MOSFET ou un transistor bipolaire.
  8. Circuit (1) selon l'une des revendications précédentes, dans lequel la tension de commutation (6) de l'élément de commutation est comprise entre 5V et 24V.
  9. Circuit (1) selon l'une des revendications précédentes, dans lequel la tension fournie par la source d'énergie (5) et appliquée au circuit parallèle (4) est comprise entre 2V et 60V.
  10. Dispositif lumineux comprenant au moins un circuit (1) selon l'une quelconque des revendications précédentes.
  11. Projecteur de véhicule, notamment de véhicule automobile, comprenant un dispositif lumineux selon la revendication 10.
EP18155962.6A 2018-02-09 2018-02-09 Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule Active EP3525552B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18155962.6A EP3525552B1 (fr) 2018-02-09 2018-02-09 Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule
CN201910103130.0A CN110139421A (zh) 2018-02-09 2019-02-01 交替接通和关断车头灯的至少两电并联灯支路的电路装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18155962.6A EP3525552B1 (fr) 2018-02-09 2018-02-09 Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule

Publications (2)

Publication Number Publication Date
EP3525552A1 EP3525552A1 (fr) 2019-08-14
EP3525552B1 true EP3525552B1 (fr) 2023-10-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18155962.6A Active EP3525552B1 (fr) 2018-02-09 2018-02-09 Agencement de circuit destiné à l'activation et à la désactivation successive l'une après l'autre d'au moins deux faisceaux lumineux connectés électriquement en parallèle pour un phare de véhicule

Country Status (2)

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EP (1) EP3525552B1 (fr)
CN (1) CN110139421A (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100525562C (zh) * 2007-02-17 2009-08-05 深圳市纯英新时代科技有限公司 Led灯组件电路单元与复合串联型led灯电路
US8710754B2 (en) * 2011-09-12 2014-04-29 Juno Manufacturing Llc Dimmable LED light fixture having adjustable color temperature
JP2014157744A (ja) * 2013-02-15 2014-08-28 Panasonic Corp 発光回路、発光モジュール及び照明装置
DE102013207245B4 (de) * 2013-04-22 2015-12-03 Osram Gmbh Ansteuerung von Halbleiterleuchtelementen sowie Lampe, Leuchte oder Leuchtsystem mit einer solchen Ansteuerung
CN106605449B (zh) * 2014-09-08 2019-06-04 西铁城时计株式会社 Led驱动电路
EP3245846A1 (fr) * 2015-01-13 2017-11-22 Philips Lighting Holding B.V. Fonctionnement d'éléments d'éclairage à del commandé par un élément photosensible

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Publication number Publication date
EP3525552A1 (fr) 2019-08-14
CN110139421A (zh) 2019-08-16

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