EP2490507B1 - Appareil de commande à DEL - Google Patents
Appareil de commande à DEL Download PDFInfo
- Publication number
- EP2490507B1 EP2490507B1 EP11001440.4A EP11001440A EP2490507B1 EP 2490507 B1 EP2490507 B1 EP 2490507B1 EP 11001440 A EP11001440 A EP 11001440A EP 2490507 B1 EP2490507 B1 EP 2490507B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leds
- channel
- channels
- led
- 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.)
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Classifications
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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]
Definitions
- the invention relates to an LED control unit, in particular for headlights, via which a plurality of LEDs, that is light emitting diodes, can be controlled channel by channel, wherein in each case a predeterminable maximum number of LEDs in series is switchable. 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.
- WO 2008/060469 A2 is an LED control device, in particular for headlamps described, via which a plurality of LEDs channel by channel can be controlled. In each case, a predefinable maximum number of LEDs can be connected in series in the various channels.
- a comparable LED control unit is in the US 2010/264834 A1 described.
- 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 number of channels.
- 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 shorted 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 device can in particular be designed such that a respective respective ranking is assigned to a respective one of the switching elements variably from channel to channel switchable LED in the different channels. This results in a channel bundling of LEDs with fixed channel ranking, in which a respective controlled LED regardless of which channel it is assigned to each, always occupying the same ranking. For example, an LED that occupies position 1 in a respective channel can only be switched back to position 1 of a respective other channel.
- 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.
- a switching of the LEDs from channel to channel is possible, in which the LEDs can additionally also change their position in the respective channel.
- an LED occupying position 1 in a first channel may be moved to any position of a particular channel another channel can be switched.
- This also applies to any other LED of a particular channel up to the last of the maximum number of LEDs provided in the channel in question.
- 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.
Claims (8)
- Appareil de commande pour diodes électroluminescentes (10), en particulier pour phare frontal, au moyen duquel une pluralité de diodes électroluminescentes (14) peuvent être pilotées par canaux, dans lequel un nombre maximum prédéterminé (n) de diodes électroluminescentes (12) sont susceptibles d'être branchées en série respectivement dans différents canaux (A, B), caractérisé en ce que
l'appareil de commande (10) est réalisé de telle façon que les diodes électroluminescentes (12) peuvent également être au moins partiellement individuellement pilotées, et peuvent être commutées, via des éléments de commutation (14), chacune de manière variable d'un canal à un autre canal de telle façon que les diodes électroluminescentes (12) respectivement pilotées sont groupées en un nombre minimum de canaux et que l'on pilote ainsi dans un nombre aussi grand que possible de canaux respectivement le nombre maximum (n) de diodes électroluminescentes (12) capables d'être branchées en série. - Appareil de commande pour diodes électroluminescentes selon la revendication 1,
caractérisé en ce que le même nombre maximum (n) de diodes électroluminescentes (12) sont capables d'être respectivement branchées en série dans les différents canaux (A, B). - Appareil de commande pour diodes électroluminescentes selon la revendication 1 ou 2,
caractérisé en ce qu'il est réalisé de telle façon que des canaux, qui ne sont plus nécessaires en raison de diodes électroluminescentes (12) qui ne doivent plus être pilotées et/ou en raison d'une commutation de diodes électroluminescentes (12) à piloter vers d'autres canaux, peuvent être coupés. - Appareil de commande pour diodes électroluminescentes selon l'une des revendications précédentes,
caractérisé en ce qu'il est réalisé de telle façon que le même ordre hiérarchique est toujours associé dans les différents canaux (A, B) à une diode électroluminescente (12) respective qui peut être commutée de manière variable d'un canal un autre canal via les éléments de commutation (14). - Appareil de commande pour diodes électroluminescentes selon l'une des revendications 1 à 3,
caractérisé en ce qu'il est réalisé de telle façon qu'une diode électroluminescente respective (12) peut être commutée de manière variable d'un canal à un autre canal au moyen des éléments de commutation (14) avec un ordre hiérarchique variable à l'intérieur des différents canaux (A, B). - Appareil de commande pour diodes électroluminescentes selon l'une des revendications précédentes,
caractérisé en ce qu'il est réalisé de telle façon que les diodes électroluminescentes (12) peuvent être pilotées via au moins deux canaux (A, B). - Appareil de commande pour diodes électroluminescentes selon l'une des revendications précédentes,
caractérisé en ce qu'il est réalisé de telle façon que les diodes électroluminescentes (12) peuvent être pilotées via plus de deux canaux. - Système lumineux à diodes électroluminescentes, en particulier pour phare frontal, comprenant une pluralité de diodes électroluminescentes (12) et un appareil de commande pour diodes électroluminescentes (10) selon l'une des revendications précédentes.
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 EP2490507A1 (fr) | 2012-08-22 |
EP2490507B1 true 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) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT516294B8 (de) | 2014-09-22 | 2017-02-15 | Zkw Group Gmbh | Verfahren und Schaltungsanordnung zum Speisen einer Serienschaltung von n LED-Einheiten |
DE102016101307B4 (de) * | 2016-01-26 | 2019-03-14 | Insta Gmbh | Beleuchtungsmodulsystem sowie daraus aufgebaute Leuchte |
DE102016217056A1 (de) | 2016-09-08 | 2018-03-08 | Osram Gmbh | Spannungsabhängiger Betrieb einzelner Lichtquellen |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602007007804D1 (de) * | 2006-11-10 | 2010-08-26 | Philips Solid State Lighting | Verfahren und vorrichtung zur steuerung von hintereinandergeschalteten led |
ES2369233T3 (es) * | 2007-12-07 | 2011-11-28 | Koninklijke Philips Electronics N.V. | Método y sistema de control del color de lámparas led. |
-
2011
- 2011-02-21 EP EP11001440.4A patent/EP2490507B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
EP2490507A1 (fr) | 2012-08-22 |
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