EP1349433A2 - Regeleinrichtung zum Regeln von elektrischen Leuchtmitteln und Scheinwerfer einer solchen Regeleinrichtung - Google Patents
Regeleinrichtung zum Regeln von elektrischen Leuchtmitteln und Scheinwerfer einer solchen Regeleinrichtung Download PDFInfo
- Publication number
- EP1349433A2 EP1349433A2 EP03100570A EP03100570A EP1349433A2 EP 1349433 A2 EP1349433 A2 EP 1349433A2 EP 03100570 A EP03100570 A EP 03100570A EP 03100570 A EP03100570 A EP 03100570A EP 1349433 A2 EP1349433 A2 EP 1349433A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control device
- connection
- temperature sensor
- controller
- voltage source
- 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.)
- Withdrawn
Links
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
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]
- H05B45/10—Controlling the intensity of the light
- H05B45/18—Controlling the intensity of the light using temperature feedback
Definitions
- the present invention relates to a regulating device for regulating of electrical lamps, with a load string, which the Includes bulbs, with a controlled current or Voltage source, which is a connection to the load train, a Connection to a constant current or constant voltage source and has a third connection.
- the invention further relates to a headlamp with a housing, with a lens, with in the housing arranged lamps and with a Control device.
- the Document discloses a PTC element in the load string of LEDs as illuminants.
- the PTC element is used to flow through the Limit LEDs if the vehicle electrical system voltage increases.
- the PTC element also serves to increase Temperatures to limit the current through the LEDs so the Protect LEDs from thermal destruction.
- a PTC element in the Load train that works as a temperature sensor has the Disadvantage that the PTC resistor is not only used as a sensor signal Ambient temperature of the LEDs depends, but also on the Self-heating through the load current, through the LEDs and the PTC element flows. This means that the PTC element is regular incorrectly detects a temperature higher than that Temperature at the location of the LEDs.
- Temperature-dependent current control using a PTC element in the load line is also disadvantageous with large Inaccuracies due to the fact that the PTC elements one uses in the load circuit to act as PTC's for one corresponding load current and the associated heat loss are dimensioned. Corresponding PTC's have tolerances in the Resistance characteristic of up to 25%.
- the PTC element in the load string has a relatively high one Power dissipation.
- FIG Embodiment discloses which regulates the Load current as a function of temperature using an IC module having.
- the IC chip makes it possible through a Current control a defined current limitation in the event of overtemperature to enable.
- the IC module has a thermally dependent one Current characteristic curve, so that when using this module no PTC resistor, and also no external resistor is necessary what is mentioned in the publication as an advantage.
- the IC component also has a third connection, which is used to control the Load current can be used, so that the IC chip controlled current source forms.
- the illuminants used in the load string are dimmed.
- a control device such as that in the exemplary embodiment according to FIG. 6 of said publication is disclosed, solves the aforementioned Problems of a control device with a PTC do not.
- the IC module has a temperature-dependent control thermally dependent current characteristic curve, that is, the temperature of the IC module itself is used as the actual value for setting the Load current used, which has the consequence that the self-heating of the IC component flows into the determined actual value and not the Temperature in the immediate vicinity of the lamp is taken into account.
- the invention is therefore based on the problem of a To propose a control device at which a temperature is recorded can be independent of the self-heating of the Actuator in the control loop.
- the invention is also the Underlying the problem of proposing a headlamp in which temperature-sensitive lamps by means of a control device can be regulated, in which the actual value acquisition is independent can be detected by the self-heating of the actuator.
- the solution according to the invention therefore requires a temperature sensor which is connected via the controller to the third connection of the controlled current or voltage source.
- a temperature sensor which is connected via the controller to the third connection of the controlled current or voltage source.
- Such a connection of the temperature sensor to a controlled current or voltage source is referred to in the prior art (EP 0 891 120 A2) as disadvantageous.
- the controller can have an operational amplifier, which is advantageously connected in such a way that it works as a reversing amplifier.
- the operational amplifier is connected in such a way that it works as an electrometer amplifier.
- the temperature sensor can be a resistance thermometer in particular include a PTC or NTC. Such a thing Resistance thermometer is advantageous in a measuring bridge connected. The is then at the inputs of the controller Bridge voltage of the measuring bridge.
- the temperature sensor can also be a thermocouple, which is advantageous via a compensation box on the controller connected.
- the lamps of the control device can be advantageous light emitting diodes according to the invention in the load train can be connected in series.
- the problem underlying the invention is further exacerbated by this solved that the headlamp a control device according to the Invention for regulating at least some of the lamps has, wherein the temperature sensor within the housing of the Headlights and preferably in the area to be regulated Illuminant is attached.
- the controller and / or the controlled current or Power source inside the headlamp housing be provided.
- the headlight has the advantage that it heats up the controller or the controlled current or voltage source has no influence on the lamps. The power loss of the The controller or the current or voltage sources therefore has no effect on the illuminants.
- the control devices according to the invention according to FIGS. 1 and 2 have a load train 1, a controller 2, and a temperature sensor 3.
- the load string 1 comprises a controlled current source I and three light-emitting diodes 11, 12, 13 connected to it in series.
- the controlled current source I is also connected to an external operating voltage U B.
- the controlled current source I is connected to the controller via a third connection and receives an actuating signal via this third connection.
- the light-emitting diodes 11, 12, 13 connected in series, which on the one hand are connected to the controlled current source, are on the other hand at ground potential.
- the controller 2 comprises an operational amplifier OP which is connected to the ohmic resistors R4, R5 to form a reversing amplifier.
- a reversing amplifier or the wiring and dimensioning of the operational amplifier and the resistors R4, R5 is well known to the person skilled in the art from his specialist knowledge.
- To supply the operational amplifier OP the positive connection for the supply voltage is connected to an external voltage source U K and the negative connection for the supply voltage is connected to ground.
- the signal to be amplified by the operational amplifier OP is present at the non-inverting input operational amplifier and the resistor R4. This signal, which is a voltage, corresponds to the output voltage of the temperature sensor, which differ in the exemplary embodiments according to FIGS. 1 and 2.
- the temperature sensor 3 of the control device it is a temperature sensor 3 which one Resistance thermometer, namely a PTC 31.
- the PTC 31 a measuring bridge known per se to the person skilled in the art is used. Due to the change in resistance of the PTC as a result of a The change in temperature changes the bridge voltage of the Measuring bridge. This bridge voltage is over the Operational amplifier OP is amplified and is present as a control signal Output of controller 2 on. This works via the third connection Signal to the controlled current source I.
- thermocouple depends on the temperature. Consequently causes a change in temperature at the thermocouple the input voltage of the inverting operational amplifier which forms controller 2. Depending on the input signal of the inverting operational amplifier thus results Control signal which at the third connection of the controlled Voltage source I of load string 1 is present.
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Gemäß der Erfindung kann der Regler einen Operationsverstärker aufweisen, der vorteilhaft so geschaltet ist, dass er als Umkehrverstärker arbeitet. Ebenso ist es jedoch denkbar, dass der Operationsverstärker so geschaltet ist, dass er als Elektrometerverstärker arbeitet.
- Fig. 1
- ein Ausführungsbeispiel mit einem Temperatursensor, welcher ein Widerstandsthermometer umfasst,
- Fig. 2
- eine Regeleinrichtung mit einem Temperatursensor, welcher ein Thermoelement umfasst und
- Fig. 3
- den Verlauf des Laststroms in Abhängigkeit der vom Temperatursensor erfassten Temperatur.
Claims (11)
- Regeleinrichtung zum Regeln von elektrischen Leuchtmittel (11, 12, 13) mit einem Laststrang (1), welcher die Leuchtmittel umfasst, mit einer gesteuerten Strom- oder Spannungsquelle (I) welche einen Anschluss zum Laststrang (1) einen Anschluss zu einer Konstantstrom- oder Konstantspannungsquelle (UB) und einem dritten Anschluss aufweist, dadurch gekennzeichnet, dass die Regeleinrichtung einen Regler (2) aufweist, der über den dritten Anschluss mit der gesteuerten Strom- oder Spannungsquelle (I) verbunden und dass der Regler (2) mit einem Temperatursensor (3) als Istwertgeber verbunden ist.
- Regeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Regler (2) einen Operationsverstärker (OP) aufweist.
- Regeleinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Operationsverstärker (OP) so beschaltet ist, dass er als Umkehrverstärker arbeitet.
- Regeleinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Temperatursensor (3) ein Widerstandsthermometer (31) umfasst.
- Regeleinrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Widerstandsthermometer in einer Messbrücke (R1, R2, R3) verschaltet ist.
- Regeleinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Temperatursensor (3) ein Thermoelement (32) umfasst.
- Regeleinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Leuchtmittel Leuchtdioden (11, 12, 13) sind.
- Regeleinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Leuchtmittel (11, 12, 13) im Laststrang (1) in Reihe geschaltet sind.
- Scheinwerfer mit einem Gehäuse, mit einer Lichtscheibe, mit in dem Gehäuse angeordneten Leuchtmittel und mit einer Regeleinrichtung nach einem der Ansprüche 1 bis 8 zum Regeln zumindest eines Teils der Leuchtmittel (11, 12, 13), wobei der Temperatursensor (3) innerhalb des Gehäuses, vorzugsweise im Bereich der zu regelnden Leuchtmittel (11, 12, 13) angebracht ist.
- Scheinwerfer nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der Regler (2) innerhalb des Gehäuses angebracht ist.
- Scheinwerfer nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die gesteuerte Strom- oder Spannungsquelle (I) innerhalb des Gehäuses angebracht ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10214447 | 2002-03-30 | ||
DE10214447A DE10214447A1 (de) | 2002-03-30 | 2002-03-30 | Regeleinrichtung zum Regeln von elektrischen Leuchtmitteln und Scheinwerfer mit einer solchen Regeleinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1349433A2 true EP1349433A2 (de) | 2003-10-01 |
EP1349433A3 EP1349433A3 (de) | 2006-01-11 |
Family
ID=27798268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03100570A Withdrawn EP1349433A3 (de) | 2002-03-30 | 2003-03-07 | Regeleinrichtung zum Regeln von elektrischen Leuchtmitteln und Scheinwerfer einer solchen Regeleinrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1349433A3 (de) |
DE (1) | DE10214447A1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006062484A1 (en) * | 2004-12-08 | 2006-06-15 | Photronfusion Solutions Pte Ltd | Led driver circuit and method of operation |
WO2009033861A1 (de) * | 2007-09-10 | 2009-03-19 | Robert Bosch Gmbh | Ansteuerschaltung |
EP2066149A2 (de) | 2007-11-27 | 2009-06-03 | Stefan Ruppel | LED-Flachleuchte mit wärmeableitender Platine insbesondere für Möbel |
EP2563095A3 (de) * | 2011-08-22 | 2013-03-27 | Panasonic Corporation | Beleuchtungsvorrichtung, Scheinwerferbeleuchtungsvorrichtung und Scheinwerfereinheit und Fahrzeug damit |
WO2013179075A1 (en) * | 2012-05-30 | 2013-12-05 | Elis Mantovani | Adaptive device for regulating the electric energy delivered on an actuator |
EP2685788A1 (de) * | 2012-07-10 | 2014-01-15 | iWatt Inc. | Wärmedrosselnde Stromversorgung für LED-Lasten |
WO2014001987A3 (en) * | 2012-06-25 | 2014-02-27 | Osram Gmbh | Light engine module, related power supply unit and lighting system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004047682A1 (de) * | 2004-09-30 | 2006-04-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | LED-Array |
DE102004055884A1 (de) * | 2004-11-19 | 2006-05-24 | Audi Ag | Leuchteinrichtung für ein Kraftfahrzeug umfassend eine oder mehrere LED's |
JP4397856B2 (ja) * | 2005-06-06 | 2010-01-13 | 株式会社小糸製作所 | 車両用灯具および車両用灯具システム |
DE102006007595B4 (de) * | 2006-02-18 | 2016-09-15 | Volkswagen Ag | Fahrzeuglicht-Steuervorrichtung und Verfahren zum Steuern eines Fahrzeuglichts |
DE102008017483A1 (de) * | 2008-04-03 | 2009-10-08 | Steinel Gmbh | Leuchtenvorrichtung |
DE102008058524B4 (de) * | 2008-11-21 | 2010-11-18 | Herbert Waldmann Gmbh & Co. Kg | Schaltungsanordnung für eine Leuchte mit Leuchtdioden |
DE102021113177A1 (de) | 2021-03-16 | 2022-09-22 | HELLA GmbH & Co. KGaA | Lichtkörper für eine Leuchte eines Fahrzeuges, Leuchte eines Fahrzeuges sowie Verfahren zum Einstellen eines elektrischen Stromes einer Lichtquelle eines Lichtkörpers |
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US5598068A (en) * | 1994-03-18 | 1997-01-28 | Sony/Tektronix Corporation | Light emitting apparatus comprising multiple groups of LEDs each containing multiple LEDs |
EP0891120A2 (de) * | 1997-07-07 | 1999-01-13 | Reitter & Schefenacker GmbH & Co. KG | Schaltungseinrichtung zum Schutz von strombetriebenen Leuchtmittein, insbesondere von LEDs, zu Signal- oder Beleuchtungszwecken |
DE19810827A1 (de) * | 1998-03-12 | 1999-09-16 | Siemens Ag | Schaltung zur temperaturabhängigen Stromversorgung einer LED |
EP0967590A1 (de) * | 1998-06-25 | 1999-12-29 | Hewlett-Packard Company | Optische Anzeigevorrichtung mit Leuchtdioden und Steuerverfahren dafür |
WO2001003474A1 (de) * | 1999-06-30 | 2001-01-11 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Ansteuerschaltung für led und zugehöriges betriebsverfahren |
US6242870B1 (en) * | 1997-10-16 | 2001-06-05 | Fujitsu Limited | Light emitting device driving circuit |
Family Cites Families (3)
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JP3209938B2 (ja) * | 1997-01-10 | 2001-09-17 | 富士通株式会社 | 発光素子の保護装置及び発光素子の保護方法 |
DE19943345A1 (de) * | 1999-09-10 | 2001-03-15 | Hella Kg Hueck & Co | LED-Leuchte |
US7262752B2 (en) * | 2001-01-16 | 2007-08-28 | Visteon Global Technologies, Inc. | Series led backlight control circuit |
-
2002
- 2002-03-30 DE DE10214447A patent/DE10214447A1/de not_active Withdrawn
-
2003
- 2003-03-07 EP EP03100570A patent/EP1349433A3/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5598068A (en) * | 1994-03-18 | 1997-01-28 | Sony/Tektronix Corporation | Light emitting apparatus comprising multiple groups of LEDs each containing multiple LEDs |
EP0891120A2 (de) * | 1997-07-07 | 1999-01-13 | Reitter & Schefenacker GmbH & Co. KG | Schaltungseinrichtung zum Schutz von strombetriebenen Leuchtmittein, insbesondere von LEDs, zu Signal- oder Beleuchtungszwecken |
US6242870B1 (en) * | 1997-10-16 | 2001-06-05 | Fujitsu Limited | Light emitting device driving circuit |
DE19810827A1 (de) * | 1998-03-12 | 1999-09-16 | Siemens Ag | Schaltung zur temperaturabhängigen Stromversorgung einer LED |
EP0967590A1 (de) * | 1998-06-25 | 1999-12-29 | Hewlett-Packard Company | Optische Anzeigevorrichtung mit Leuchtdioden und Steuerverfahren dafür |
WO2001003474A1 (de) * | 1999-06-30 | 2001-01-11 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Ansteuerschaltung für led und zugehöriges betriebsverfahren |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006062484A1 (en) * | 2004-12-08 | 2006-06-15 | Photronfusion Solutions Pte Ltd | Led driver circuit and method of operation |
WO2009033861A1 (de) * | 2007-09-10 | 2009-03-19 | Robert Bosch Gmbh | Ansteuerschaltung |
EP2066149A2 (de) | 2007-11-27 | 2009-06-03 | Stefan Ruppel | LED-Flachleuchte mit wärmeableitender Platine insbesondere für Möbel |
EP2066149A3 (de) * | 2007-11-27 | 2009-08-19 | Stefan Ruppel | LED-Flachleuchte mit wärmeableitender Platine insbesondere für Möbel |
US8766540B2 (en) | 2011-08-22 | 2014-07-01 | Panasonic Corporation | Lighting device, headlamp lighting device, and headlamp unit and vehicle having same |
EP2563095A3 (de) * | 2011-08-22 | 2013-03-27 | Panasonic Corporation | Beleuchtungsvorrichtung, Scheinwerferbeleuchtungsvorrichtung und Scheinwerfereinheit und Fahrzeug damit |
WO2013179075A1 (en) * | 2012-05-30 | 2013-12-05 | Elis Mantovani | Adaptive device for regulating the electric energy delivered on an actuator |
WO2014001987A3 (en) * | 2012-06-25 | 2014-02-27 | Osram Gmbh | Light engine module, related power supply unit and lighting system |
CN104412708A (zh) * | 2012-06-25 | 2015-03-11 | 欧司朗股份有限公司 | 照明引擎模块、相关电源单元以及照明系统 |
CN104412708B (zh) * | 2012-06-25 | 2016-09-07 | 欧司朗股份有限公司 | 照明引擎模块、相关电源单元以及照明系统 |
US9445466B2 (en) | 2012-06-25 | 2016-09-13 | Osram Gmbh | Lighting system with an interface having a power supply unit and at least one light source module |
CN105960056A (zh) * | 2012-06-25 | 2016-09-21 | 欧司朗股份有限公司 | 电源单元和相关照明系统 |
US9554430B2 (en) | 2012-06-25 | 2017-01-24 | Osram Gmbh | Lighting system with an interface having a power supply unit and at least one light source module |
US9609700B2 (en) | 2012-06-25 | 2017-03-28 | Osram Gmbh | Light engine module, related power supply unit and lighting system |
CN105960056B (zh) * | 2012-06-25 | 2018-02-09 | 欧司朗股份有限公司 | 电源单元和相关照明系统 |
EP2685788A1 (de) * | 2012-07-10 | 2014-01-15 | iWatt Inc. | Wärmedrosselnde Stromversorgung für LED-Lasten |
US9060408B2 (en) | 2012-07-10 | 2015-06-16 | Dialog Semiconductor Inc. | Thermal de-rating power supply for LED loads |
Also Published As
Publication number | Publication date |
---|---|
DE10214447A1 (de) | 2003-10-16 |
EP1349433A3 (de) | 2006-01-11 |
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