EP1945006B1 - Circuit avec groupes de branches de diodes électroluminescentes en parallel, en série. - Google Patents

Circuit avec groupes de branches de diodes électroluminescentes en parallel, en série. Download PDF

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Publication number
EP1945006B1
EP1945006B1 EP08100163.8A EP08100163A EP1945006B1 EP 1945006 B1 EP1945006 B1 EP 1945006B1 EP 08100163 A EP08100163 A EP 08100163A EP 1945006 B1 EP1945006 B1 EP 1945006B1
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EP
European Patent Office
Prior art keywords
groups
current source
group
path
current
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.)
Active
Application number
EP08100163.8A
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German (de)
English (en)
Other versions
EP1945006A3 (fr
EP1945006A2 (fr
Inventor
Arne Meinel
Stephan Schröder
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1945006A2 publication Critical patent/EP1945006A2/fr
Publication of EP1945006A3 publication Critical patent/EP1945006A3/fr
Application granted granted Critical
Publication of EP1945006B1 publication Critical patent/EP1945006B1/fr
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Classifications

    • 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

Definitions

  • the invention relates to a light emitting diode circuit arrangement comprising groups of parallel branches, wherein the groups are arranged in series, wherein in at least a first group at least one first branch at least one light emitting diode and at least one second branch does not comprise a light emitting diode and wherein the branches in the other groups at least each comprise a light emitting diode.
  • a circuit arrangement of this kind is for example from the publication with the publication number DE 697 09 206 T2 known.
  • a circuit arrangement for light emitting diodes is disclosed in which in the second branch of the first group, that is the branch without light emitting diode, a resistance element is arranged.
  • the resistance element can be combined with a diode in particular also with a Zener diode.
  • the light-emitting diode circuit arrangement described above is to be developed such that even if the light-emitting diode in the first branch of the first group fails, the remaining light-emitting diodes in the remaining branches can continue to be operated at full power. This is intended to maintain the function of the circuit even if the light emitting diode in the first branch fails.
  • the first controlled current source is intended to adjust the current through the first branch and through the light-emitting diode arranged in the first branch.
  • the adjustment of the current through the first light-emitting diode can be effected independently of the current through the remaining light-emitting diodes.
  • a first resistance component is arranged as a measuring resistor in the first branch of the first group, which is connected to the first controlled current source for regulating the current through the first branch.
  • a circuit arrangement according to the invention may comprise a plurality of first branches in the first group.
  • the circuit arrangement according to the invention can have a further controlled current source.
  • This second controlled current source is preferably arranged in the second branch of the first group.
  • a second resistance component can then be arranged as a measuring resistor. This second resistance device interacts with the second controlled current source. This makes it possible to regulate the current through the series connection of the groups.
  • the current through the branches of the further groups and through the second branch of the first group is essentially predetermined by the second controlled current source
  • the current through the first branch is set by the first current source. The current through the first branch can thus be adjusted independently of the currents through the remaining branches.
  • the current through the first branch of the first group can be adjusted to a desired current of the light-emitting diode of the first branch by means of the first controlled current source.
  • the current through the series connection of the groups can be set so that the same current flows through each branch, in particular the branches of the further groups.
  • an operation of the circuit arrangement according to the invention in case of failure ie when selecting the LEDs in the first branch so possible that by means of the second controlled current source, the current through the series circuit of the other groups is set so that the current through the branches of the other groups as well is great as in trouble-free operation.
  • the failure of the light-emitting diode in the first branch thus has no effect on the light-emitting diode current of the remaining light-emitting diodes. The light emitted by the other LEDs thus remains unaffected.
  • the circuit arrangement according to the invention has a connection VCC for the positive potential of the voltage supply and a connection GND for the negative potential of the supply voltage.
  • VCC for the positive potential of the voltage supply
  • GND for the negative potential of the supply voltage.
  • the circuit arrangement essentially comprises six branches 1, 2, 3, 4, 5, 6 belonging to three groups 1, 2; 3, 4; 5, 6 are summarized with two branches.
  • the two branches of a group are connected in parallel and the groups are connected in series.
  • the first group 1, 2 comprises the two parallel branches 1, 2, which are connected to the connection VCC for the positive potential of the voltage source with the interposition of a resistor element R2sens.
  • the third group 5, 6 comprises the two parallel-connected branches 5, 6, which are connected to the negative potential GND of the voltage source.
  • the second group 3, 4 comprises the two parallel branches 3, 4 which is arranged between the first group 1, 2 and the third group 5, 6.
  • a resistance element R1 sens, a controlled current source lq1 and a light emitting diode D1 is used.
  • the resistance element R1sens serves as a measuring resistor for the controlled current source Iq1.
  • the current, the current source Iq1 is adjusted so that a current flows through the first branch, which corresponds to the nominal current of the light emitting diode D1.
  • a controlled current source lq2 is also provided in the second branch 2 of the first group 1, 2.
  • the second branch 2 comprises no further components.
  • the second controlled current source Iq2 is connected to the second resistance element R2sens.
  • the second resistance element R2sens serves as the second controlled current source Iq2 as a measuring resistor. With the second controlled current source Iq2, a current through the first, second and third group of the circuit arrangement is set.
  • a light-emitting diode D3, D4, D5, D6 is arranged in each case.
  • the second resistance element R2sens and the second controlled current source lq2 are coordinated or adjusted to one another such that the same current flows through all the light-emitting diodes.
  • the second controlled current source lq2 ensures that the remaining light-emitting diodes D3 to D6 are supplied with the same current uninfluenced. As a result, the light emission is maintained.

Landscapes

  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (8)

  1. Agencement de commutation à diodes électroluminescentes comprenant des groupes (1, 2; 3, 4; 5, 6) de branches parallèles (1 à 6), les groupes (1, 2; 3, 4; 5, 6) étant disposés en série, au moins dans un premier groupe (1, 2) au moins une première branche (1) comportant au moins une diode électroluminescente (D1) et au moins une deuxième branche (2) ne comportant pas de diode électroluminescente et les branches (3 à 6) dans les autres groupes (3, 4; 5, 6) comportant au moins une diode électroluminescente (D3 à D6) chaque fois
    caractérisé en ce qu'
    à la première branche (1) du premier groupe (1, 2) une première source de courant commandée (Iq1) est disposée en série par rapport à la diode électroluminescente (D1).
  2. L'agencement de commutation à diodes électroluminescentes selon la revendication 1, caractérisé en ce qu'à la première branche (1) du premier groupe (1, 2) un premier composant de résistance (R1sens) est disposé en tant que résistance de mesure qui est reliée à la première source de courant commandée (Iq1) pour le réglage du courant à travers la première branche (1).
  3. L'agencement de commutation à diodes électroluminescentes selon la revendication 1 ou 2, caractérisé en ce qu'à la deuxième branche (2) du premier groupe (1, 2) une deuxième source de courant commandée (Iq2) est disposée.
  4. L'agencement de commutation à diodes électroluminescentes selon la revendication 3, caractérisé en ce qu'une ligne électrique menant à un groupe (3, 4; 5, 6) disposé en série un deuxième composant de résistance (R2sens) est disposé en tant que résistance de mesure qui est reliée à la deuxième source de courant commandée (Iq2) pour le réglage du courant par le montage en série des groupes (1, 2; 3, 4; 5, 6).
  5. Procédé de fonctionnement d'un agencement de commutation à diodes électroluminescentes selon l'une des revendications 1 à 4, caractérisé en ce qu'au fonctionnement sans perturbations le courant est réglé au moyen de la première source de courant commandée (Iq1) à travers la première branche (1) du premier groupe (1; 2) à un courant de consigne de la diode électroluminescente (D1) de la première branche (1).
  6. Procédé selon la revendication 5, caractérisé en ce qu'au fonctionnement sans perturbations le courant est réglé au moyen de la deuxième source de courant commandée (Iq2) par le montage en série des groupes (1, 2; 3, 4; 5, 6).
  7. Procédé selon la revendication 6, caractérisé en ce que le courant est réglé par le montage en série des groupes (1, 2; 3, 4; 5, 6) de telle manière que le même courant passe par chaque branche (1 à 6) surtout des autres groupes (3, 4; 5, 6).
  8. Procédé selon l'une des revendications 5 à 7, caractérisé en ce qu'en cas de défaillance de la diode électroluminescente (D1) de la première branche (1) le courant est réglé au moyen de la deuxième source de courant commandée (Iq2) par le montage en série des autres groupes (3, 4; 5, 6) de telle manière que le courant à travers les branches (3 à 6) des autres groupes (3, 4; 5, 6) soit égal à celui au fonctionnement sans perturbations.
EP08100163.8A 2007-01-11 2008-01-07 Circuit avec groupes de branches de diodes électroluminescentes en parallel, en série. Active EP1945006B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001716.4A DE102007001716B4 (de) 2007-01-11 2007-01-11 Leuchtdioden-Schaltungsanordnung sowie Verfahren zum Betreiben einer Leuchtdioden-Schaltungsanordnung

Publications (3)

Publication Number Publication Date
EP1945006A2 EP1945006A2 (fr) 2008-07-16
EP1945006A3 EP1945006A3 (fr) 2013-12-04
EP1945006B1 true EP1945006B1 (fr) 2015-02-25

Family

ID=39277281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08100163.8A Active EP1945006B1 (fr) 2007-01-11 2008-01-07 Circuit avec groupes de branches de diodes électroluminescentes en parallel, en série.

Country Status (2)

Country Link
EP (1) EP1945006B1 (fr)
DE (1) DE102007001716B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102261255B1 (ko) 2013-08-28 2021-06-04 엘모스 세미컨덕터 에스이 적어도 하나의 컨슈머에 전기 에너지를 공급하기 위한 또는 적어도 하나의 컨슈머에 대해 전력을 제공하기 위한 장치
DE102014012790B4 (de) 2014-08-27 2023-08-24 Elmos Semiconductor Se Verfahren zur Regelung des Betriebsstromes einer Brückenschaltung
DE102014012787A1 (de) 2014-08-27 2016-03-17 Elmos Semiconductor Aktiengesellschaft Verfahren zur Regelung des Betriebsstromes einer LED-Leuchteneinheit
DE102014012789B4 (de) 2014-08-27 2023-08-24 Elmos Semiconductor Se Vorrichtung zur Regelung des Betriebsstromes einer LED-Leuchteneinheit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9313820U1 (de) * 1993-09-13 1994-01-20 Gebensleben Enno Fahrradbeleuchtung
US5765940A (en) * 1995-10-31 1998-06-16 Dialight Corporation LED-illuminated stop/tail lamp assembly
FR2745458B1 (fr) * 1996-02-28 1998-04-10 Valeo Electronique Perfectionnement aux circuits d'illumination a diodes electroluminescentes, notamment pour vehicules automobiles, feu de signalisation et tableau de commande l'incorporant
DE10025810B4 (de) * 2000-05-24 2014-01-23 SMR Patents S.à.r.l. Leuchteneinheit, insbesondere für Außenrückblickspiegel von Fahrzeugen, vorzugsweise von Kraftfahrzeugen
JP2004090858A (ja) * 2002-09-03 2004-03-25 Toyoda Gosei Co Ltd ストップランプ
US7202608B2 (en) * 2004-06-30 2007-04-10 Tir Systems Ltd. Switched constant current driving and control circuit

Also Published As

Publication number Publication date
EP1945006A3 (fr) 2013-12-04
EP1945006A2 (fr) 2008-07-16
DE102007001716B4 (de) 2015-11-05
DE102007001716A1 (de) 2008-07-17

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