EP2490507A1 - Appareil de commande à DEL - Google Patents

Appareil de commande à DEL Download PDF

Info

Publication number
EP2490507A1
EP2490507A1 EP11001440A EP11001440A EP2490507A1 EP 2490507 A1 EP2490507 A1 EP 2490507A1 EP 11001440 A EP11001440 A EP 11001440A EP 11001440 A EP11001440 A EP 11001440A EP 2490507 A1 EP2490507 A1 EP 2490507A1
Authority
EP
European Patent Office
Prior art keywords
leds
channel
led
channels
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11001440A
Other languages
German (de)
English (en)
Other versions
EP2490507B1 (fr
Inventor
Jochen Suck
Hussein Baydoun
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP11001440.4A priority Critical patent/EP2490507B1/fr
Publication of EP2490507A1 publication Critical patent/EP2490507A1/fr
Application granted granted Critical
Publication of EP2490507B1 publication Critical patent/EP2490507B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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]

Definitions

  • the invention relates to an LED control device, in particular for headlights, via which a plurality of LEDs, that is light-emitting diodes, can be controlled channel by channel, wherein in the various channels in each case a predeterminable maximum number of LEDs can be connected in series. It further relates to an LED lighting system, in particular for headlights, with a plurality of LEDs and such an LED control unit.
  • the light-emitting diodes or LEDs are driven channel by channel, wherein the channels may each comprise a plurality of LEDs connected in series.
  • the channels may each comprise a plurality of LEDs connected in series.
  • LED controllers that can also individually control the LEDs to optimize the illumination and placement of the LEDs in the headlamp. It would be conceivable to switch the LEDs again in series by channel. If the LEDs should also be individually controllable, this could result in the fact that no longer all the associated LEDs are switched on or needed in each channel at the same time. Nevertheless, a respective active channel would always have to provide the energy for all LEDs associated with it, as it has been common practice to short the unneeded LEDs.
  • a common power-free, ie, hard, short circuit with a resistance of substantially 0 ohms would involve the risk of current spikes and damage to the other LEDs. It would be conceivable, instead of a hard short circuit, to provide a soft short circuit with a resistance value> 0 ohm, in which the same electrical power is converted as in a controlled LED. But if several LEDs are deactivated in a respective channel, then the Effectiveness of the entire LED lighting and in particular the relevant control electronics, since for each deactivated LED still required for a driven LED power must be provided in the channel, so no energy is saved. For a particular channel would thus regardless of whether the maximum number of LEDs or only a part of it is required, always the same energy incurred.
  • the invention has for its object to provide an improved LED control device and an improved LED lighting system of the type mentioned that not only allow variable illumination or variably positionable activation of LEDs, but also ensure the highest possible efficiency.
  • this object is achieved in that it is designed so that the LEDs are at least partially individually controllable and switching elements each variable from channel to channel so switchable that the respective controlled LEDs to a minimum number of channels be bundled and thus in each case the maximum number of series-switchable LEDs is controlled in as many channels.
  • the LEDs can now be efficiently interconnected from channel to channel so that the channels can each be operated with their maximum number of LEDs.
  • additional switching elements are provided, via which the LEDs can be switched to the individual channels or the LEDs are bundled to the most effective channel count.
  • the efficiency of the entire LED controller which may include multiple channels, increased by a multiple, since unneeded channels that would otherwise have to supply only a few LEDs can be easily switched off as a result of such channel bundling.
  • the same maximum number of LEDs can be connected in series in the different channels.
  • the LED control unit is designed so that no longer required channels can be switched off due to non-controllable LEDs and / or switching to be controlled LEDs on other channels.
  • an LED controller has two channels each with a maximum of eight LEDs, and a first channel is operated with four active LEDs and four inactive LEDs, while the second channel is operated with three active and five inactive LEDs, with the usual short circuits in the first channel contains four short-circuited LEDs and in the second channel even five short-circuited LEDs.
  • both channels would have to be operated with a total of only seven LEDs switched on, while the remaining LEDs would be short-circuited via resistors.
  • the seven switched-on or activated LEDs which would have to be interconnected to two channels, can now be switched over to the first channel, while the second channel, which is no longer needed, can be switched off.
  • the LED control unit can in particular be designed such that a respective variable in the different channels is assigned to a respective via the switching elements variable from channel to channel LED in each case the same ranking.
  • a respective variable in the different channels is assigned to a respective via the switching elements variable from channel to channel LED in each case the same ranking.
  • the LED control unit can also be designed such that a respective LED can be variably switched over from channel to channel via the variable-ranking switching elements within the various channels.
  • an LED occupying position 1 in a first channel can be switched to any position of a respective further channel.
  • an LED occupying the position 4 of a first channel can be switched over to any position of a further channel.
  • this fourth position of the first channel engaging LED is switchable to any position of the second channel.
  • said LED can be switched to any position of any other channel.
  • the LED control unit can be designed, for example, so that the LEDs can be controlled via only two channels.
  • the LED control device can in particular also be designed such that the LEDs can be controlled via more than two channels.
  • the LED lighting system according to the invention is characterized in that it comprises a multiplicity of LEDs as well as an LED control device according to the invention.
  • the sole figure of the drawing shows the switching principle of an exemplary embodiment of the LED control device according to the invention with a channel bundling of LEDs with a fixed channel order.
  • the LED controller 10 which may be provided in particular for headlights, a plurality of LEDs 12 channel-controlled.
  • a predeterminable maximum number n of LEDs 12 in series switchable in each case a predeterminable maximum number n of LEDs 12 in series switchable.
  • the LED controller 10 is designed so that the LEDs 12 are also individually controllable and switching elements 14 each variable from channel to channel so switchable that the respective controlled LEDs are bundled to a minimum number of channels and thus in as many channels each the maximum number n of series-connected LEDs 12 is controlled.
  • n of LEDs 12 can be connected in series in the different channels A, B,...
  • the LED controller 10 can now be designed in particular so that no longer required channels can be switched off due to non-actuated LEDs 12 and / or a switch to be controlled LEDs on other channels.
  • the LED controller 10 is designed so that a respective switchable over the switching elements 14 from channel to channel LED 12 in the different channels A, B, ... is assigned in each case the same ranking.
  • the LED control unit 10 is designed, for example, so that the LEDs 12 are only two channels A, B can be controlled. In principle, however, the LEDs 12 can also be controlled via more than two channels.
  • the switching principle of an exemplary embodiment of an LED controller 10 is shown with such channel bundling with a fixed ranking and, for example, an interconnection of LEDs 12 between two channels A, B, wherein the LEDs 12 do not change their position in the channels can.
  • the first LED 12 in the channel A can only be switched to the first LED position in the channel B.
  • the remaining LEDs 12 of a respective channel up to the last LED of the maximum number n of LEDs in the channel can only be switched to the fourth position of the second channel B.
  • a corresponding expansion or expansion can take place, so that For example, the provided on the fourth position of the first channel A LED 12 can be switched to the fourth position of any other channel.
  • the various channels A, B may each comprise a DC / DC converter.
  • B switching elements 16 may be provided.

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP11001440.4A 2011-02-21 2011-02-21 Appareil de commande à DEL Active EP2490507B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11001440.4A EP2490507B1 (fr) 2011-02-21 2011-02-21 Appareil de commande à DEL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11001440.4A EP2490507B1 (fr) 2011-02-21 2011-02-21 Appareil de commande à DEL

Publications (2)

Publication Number Publication Date
EP2490507A1 true EP2490507A1 (fr) 2012-08-22
EP2490507B1 EP2490507B1 (fr) 2013-06-19

Family

ID=44310127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11001440.4A Active EP2490507B1 (fr) 2011-02-21 2011-02-21 Appareil de commande à DEL

Country Status (1)

Country Link
EP (1) EP2490507B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516294A1 (de) * 2014-09-22 2016-04-15 Zizala Lichtsysteme Gmbh Verfahren und Schaltungsanordnung zum Speisen einer Serienschaltung von n LED-Einheiten
EP3199863A1 (fr) * 2016-01-26 2017-08-02 Insta GmbH Système de module d'éclairage et éclairage ainsi constitué
DE102016217056A1 (de) 2016-09-08 2018-03-08 Osram Gmbh Spannungsabhängiger Betrieb einzelner Lichtquellen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008060469A2 (fr) * 2006-11-10 2008-05-22 Philips Solid-State Lighting Solutions, Inc. Procédés et appareil pour commander des led reliées en série
US20100264834A1 (en) * 2007-12-07 2010-10-21 Koninklijke Philips Electronics N.V. Led lamp color control system and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008060469A2 (fr) * 2006-11-10 2008-05-22 Philips Solid-State Lighting Solutions, Inc. Procédés et appareil pour commander des led reliées en série
US20100264834A1 (en) * 2007-12-07 2010-10-21 Koninklijke Philips Electronics N.V. Led lamp color control system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516294A1 (de) * 2014-09-22 2016-04-15 Zizala Lichtsysteme Gmbh Verfahren und Schaltungsanordnung zum Speisen einer Serienschaltung von n LED-Einheiten
AT516294B1 (de) * 2014-09-22 2017-01-15 Zkw Group Gmbh Verfahren und Schaltungsanordnung zum Speisen einer Serienschaltung von n LED-Einheiten
US10071672B2 (en) 2014-09-22 2018-09-11 Zkw Group Gmbh Method and circuit arrangement for feeding a series circuit of n LED units
EP3199863A1 (fr) * 2016-01-26 2017-08-02 Insta GmbH Système de module d'éclairage et éclairage ainsi constitué
DE102016217056A1 (de) 2016-09-08 2018-03-08 Osram Gmbh Spannungsabhängiger Betrieb einzelner Lichtquellen

Also Published As

Publication number Publication date
EP2490507B1 (fr) 2013-06-19

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