EP3038433A2 - Module d'eclairage del, feu de signalisation comprenant un tel module d'eclairage et procede de fonctionnement d'un tel module d'eclairage - Google Patents

Module d'eclairage del, feu de signalisation comprenant un tel module d'eclairage et procede de fonctionnement d'un tel module d'eclairage Download PDF

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Publication number
EP3038433A2
EP3038433A2 EP15199957.0A EP15199957A EP3038433A2 EP 3038433 A2 EP3038433 A2 EP 3038433A2 EP 15199957 A EP15199957 A EP 15199957A EP 3038433 A2 EP3038433 A2 EP 3038433A2
Authority
EP
European Patent Office
Prior art keywords
leds
light module
during operation
light
led
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
EP15199957.0A
Other languages
German (de)
English (en)
Other versions
EP3038433B1 (fr
EP3038433A3 (fr
Inventor
Jan Depke
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.)
Pintsch GmbH
Original Assignee
Pintsch Bamag AG
Pintsch Bamag Antriebs und Verkehrstechnik GmbH
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 Pintsch Bamag AG, Pintsch Bamag Antriebs und Verkehrstechnik GmbH filed Critical Pintsch Bamag AG
Priority to RS20220947A priority Critical patent/RS63645B1/sr
Priority to HRP20221261TT priority patent/HRP20221261T1/hr
Publication of EP3038433A2 publication Critical patent/EP3038433A2/fr
Publication of EP3038433A3 publication Critical patent/EP3038433A3/fr
Application granted granted Critical
Publication of EP3038433B1 publication Critical patent/EP3038433B1/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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • 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
    • H05B45/12—Controlling the intensity of the light using optical feedback

Definitions

  • the invention relates to an LED light module, a signal light with such a light module, in particular for rail, water, air or road traffic and a method for operating such a light module.
  • LEDs light-emitting diodes
  • Traffic lights, marker lights and vehicle lights which here lights are understood for all types of land, water and air vehicles.
  • the total failure of an LED can be detected by a combined current-voltage monitoring.
  • this type of monitoring does not make it possible to detect a change in the luminous flux (degradation) caused, for example, by aging of the LEDs.
  • LED light modules i. Arrangements with usually multiple LEDs and other elements such as Vorschaltikien for operating the LEDs to be provided with a Radiozeit93er that detects the actual operating life of the LEDs. If a certain operating time is reached, the LEDs are replaced, regardless of whether the light emitted by them is still sufficient to fulfill the possibly prescribed requirements or not. This procedure leads to regular replacement of LEDs, which still work correctly.
  • the US 6,078,148 describes a controller for a transformer having primary and secondary windings with a plurality of turns and taps for changing the number of effective turns and thus a LED full-wave power.
  • the taps are controlled as a function of an operating parameter of the LEDs for maintaining the light output LEDs above a predetermined level based on a combination of measurements of voltages and currents on the LEDs.
  • the EP 0 974 947 A1 shows a traffic signal with at least one signal generator whose light source is formed by arranged in the form of a matrix LEDs, and with a monitoring device for checking the LEDs on their error-free operating state, which arranged in the beam path of the LEDs and a light sensor associated with this evaluation for comparing a light sensor signal generated by the light sensor having a predetermined setpoint corresponding to a normal operating state of the light-emitting diodes.
  • the DE 10 2005 032 719 A1 shows a traffic signal with at least one light-emitting diode having signal generator for emitting a light signal, with a control unit for controlling, evaluation and monitoring of the signal generator, with lines for power supply and lines for data transmission between the controller and the signal generators, and with a circuit device for controlling the signal generator, and each signal generator arranged in its immediate vicinity circuit device, wherein the signal generator are connected via a the power supply lines and the data transmission lines having wiring harness with the control unit.
  • the DE 10 2010 026 012 A1 has a signal generator for generating different colored light points with RGB LEDs on an optical sensor for fail-safe monitoring of the color locus and the light level of the signal generator on.
  • To operate a fan shows DE 10 2010 013 310 A1 an output circuit connected to an output of a ballast for supplying a lighting module with electrical energy, wherein both the fan and a control circuit for supplying electrical energy are connected to the output circuit.
  • the invention has for its object to provide an LED light module with a monitoring unit and a signal lamp equipped therewith, in which the monitoring unit with minimum material costs and therefore can be made particularly cost-effective.
  • the invention is also based on the object of specifying a method for operating an LED light module, which can be carried out in a cost-saving manner while ensuring a high degree of operational reliability.
  • the LED light module according to the invention does not require a separate power supply of the monitoring unit, but this can use the light module with pulse width modulation of the supplied power to monitor the emitted luminous flux and thereby to dispense with a complex out-calculation of stray light components, which are miterutzt of conventional monitoring units ,
  • FIG. 1 is very schematic illustrates the basic idea of the invention, according to which a strand 10 of series-connected LEDs of a corresponding LED light module, in particular a light module for signal lights of road and rail transport, in a conventional manner via a line 12, a current with a certain voltage and then a portion of the supplied current via a parallel to at least some of the LEDs of the strand circuit for operating a monitoring unit 14 is used.
  • the monitoring unit 14 can detect certain operating parameters of the light module, such as the current flowing through the string during operation, the voltage dropping across the string, the temperature in the vicinity of the string and the luminous flux generated by the string, and characteristic values for these operating parameters to a higher level Output evaluation unit 16.
  • the monitoring unit 14 can be completely powered by the power supply of the LED string so that advantageously dispensed with a separate power supply and thus in particular when the light module is used in signal lights for rail transport, sometimes quite considerable amounts of cable can be saved.
  • Means such as voltage meters for the forward LED voltage may be provided, which are connected in parallel to one or more LEDs 18 of the strand 10. These means can be powered during operation of the light module via the power supply 20 of the LEDs.
  • the higher-level evaluation unit 16 is supplied via the power supply of the LED string, thus avoiding a scattered light detection in particular pulsed switched off LED string.
  • the necessary modern components such as e.g. Temperature or photosensor and microcontroller, have such a low power consumption, that it has no significant effect on the luminous flux of the LED strand when a branch of the power supply to the units 14 and 16 is diverted via said parallel circuit.
  • an LED string 10 of the type in question for example, eight LEDs in series with a current consumption of 350 mA
  • a Photo sensor as means for detecting a further operating parameter and a corresponding microcontroller for evaluating the signal of the photo sensor have a current consumption in the range of about 1 to 2 mA. It has been found that a circuit according to the invention works particularly well, in particular, when the current consumption of the units 14 and 16 is more than 20 times smaller than the current consumption of the LED string, preferably about 50 to 100 times smaller.
  • FIG. 2 an embodiment of the invention is shown, in which case two operating parameters detected and used to monitor and control the LED string in the inventive manner.
  • the units of the Fig. 1 corresponding units were with the also in Fig. 1 provided reference numerals.
  • the light module shown forms in this embodiment, a unit that can be installed in particular in a signal light and powered externally via a line 12.
  • the LED string is formed by a number of serially connected LEDs 18, only a few of which are shown, with the supply voltage and current being controlled by a ballast 20.
  • the ballast unit 20, like the evaluation unit 16 is part of the light module, but, like the evaluation unit 16, can also be arranged outside the actual light module. Evaluation unit 16 and ballast unit can be part of a single control unit.
  • power is supplied to a monitoring unit 14 at a first location via a circuit parallel to the series connection of the LEDs 18, wherein the various rectangular signals symbolically represented in the figure are intended to indicate that the current is pulse width modulated.
  • the monitoring unit 14 in this embodiment comprises a photosensor 24, which is arranged in the light module and detects a proportional to the luminous flux, which is generated during operation of the LEDs, value.
  • the LEDs are typically arranged rotationally symmetric, and the light module is provided with a header or lens, whereby a part of the emitted light is reflected back, which can then be detected by the photosensor 24.
  • the monitoring unit 14 further comprises, in this embodiment, two voltmeters 26 which, together with respective shunt resistors 28 and lines 30, enable indirect current measurement of the current flowing through the LED string in operation.
  • a voltmeter which measures the total voltage drop across the LED string, which may be particularly advantageous in light modules for use in signal lights for rail traffic.
  • the advantages of a combined current-voltage monitoring in the monitoring of LED strings are known and, for example in the EP 1 992 524 A2 , the contents of which are hereby incorporated by reference.
  • means provided for detecting the current and / or the voltage may be pulsed with power via the power supply of the LEDs.
  • the values which are representative of the current flowing through the LED string and the current value proportional to the luminous flux emitted during the operation of the LEDs and measured by the photosensor 24 are fed to the evaluation unit 16, which is in this case Embodiment comprises a microcontroller 32 and a controller 34, which is designed to output a control value to the ballast unit 20.
  • the evaluation unit 16 does not have its own power supply, as in the case of previously known light modules, but advantageously, just like the monitoring unit 14, it is fed by the current fed to the LEDs 18.
  • the evaluation unit 16 can generate a corresponding control signal, by means of which the ballast unit 20 causes the current supplied to the LEDs to increase so that the desired luminous flux results.
  • the evaluation unit 16 is designed to directly or indirectly control the current supplied to the LED string as a function of the so-called “further operating parameter", in this case the luminous flux, ie to influence the current either directly as part of a more complex control circuit or with a separate unit, here the Vorschaltmaschine 20 to communicate and transmit this information, which are the basis for a control of the current, and so indirectly control the power.
  • the so-called “further operating parameter” in this case the luminous flux, ie to influence the current either directly as part of a more complex control circuit or with a separate unit, here the Vorschaltmaschine 20 to communicate and transmit this information, which are the basis for a control of the current, and so indirectly control the power.
  • the actual current detection is dual-channel, thus redundant, so that incorrect measurements are practically excluded because the microcontroller 32 may be designed so that it can generate a corresponding error message in case of deviations between the two signals representative of the actual current then in a conventional manner to a parent body, for example, a maintenance center, can be transmitted.
  • the pulse-width modulated operation provided in a preferred embodiment of the invention has two significant further advantages. It is unnecessary in those cases in which the means for detecting at least one further operating parameter a photosensor as in Fig. 2 include, a complex calculation of the scattered light component, since the sensor is only in operation by the supply according to the invention via the LED current, even if the LEDs are turned on, in which case stray light components can be neglected. Light falling on the sensor when the LEDs are turned off between two current pulses is not included in the usual summation by the sensor, so advantageously low cost standard photosensors that sum light to output a reading over a certain period of time are used can be.
  • the evaluation unit 16 can check whether the photosensor 24 or the voltmeter 26 deliver signals during the time between two current pulses, from which then a malfunction of the photosensor and / or the voltmeter closed and in per se known Way a corresponding error message can be generated.
  • the evaluation unit 16 has virtually a function for testing the means for detecting the at least one further operating parameter. It is therefore checked whether the signals output by the ammeter and / or the photosensor show a course which corresponds to the course of the pulse-width-modulated current.
  • the invention allows in a particularly simple and cost-effective manner for the first time the realization of a particularly secure monitoring of the correct functioning of an LED light module, as three different monitoring methods - monitoring the voltage drop across the LED string, monitoring the current flowing through the strand and detection of the delivered Luminous flux proportional value - can be combined.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
  • Led Device Packages (AREA)
EP15199957.0A 2014-12-23 2015-12-14 Module d'eclairage del, feu de signalisation comprenant un tel module d'eclairage et procede de fonctionnement d'un tel module d'eclairage Active EP3038433B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RS20220947A RS63645B1 (sr) 2014-12-23 2015-12-14 Led svetlosni modul, signalno svetlo sa takvim svetlosnim modulom, kao i postupak rada takvog svetlosnog modula
HRP20221261TT HRP20221261T1 (hr) 2014-12-23 2015-12-14 Led svjetlosni modul, signalno svijetlo sa takvim svjetlosnim modulom, kao i postupak rada takvog svjetlosnog modula

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014119623.6A DE102014119623A1 (de) 2014-12-23 2014-12-23 LED-Lichtmodul, Signalleuchte mit einem solchen Lichtmodul sowie Verfahren zum Betreiben eines solchen Lichtmoduls

Publications (3)

Publication Number Publication Date
EP3038433A2 true EP3038433A2 (fr) 2016-06-29
EP3038433A3 EP3038433A3 (fr) 2016-07-27
EP3038433B1 EP3038433B1 (fr) 2022-07-13

Family

ID=54979405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15199957.0A Active EP3038433B1 (fr) 2014-12-23 2015-12-14 Module d'eclairage del, feu de signalisation comprenant un tel module d'eclairage et procede de fonctionnement d'un tel module d'eclairage

Country Status (10)

Country Link
EP (1) EP3038433B1 (fr)
DE (1) DE102014119623A1 (fr)
DK (1) DK3038433T3 (fr)
ES (1) ES2928388T3 (fr)
HR (1) HRP20221261T1 (fr)
HU (1) HUE060173T2 (fr)
LT (1) LT3038433T (fr)
PL (1) PL3038433T3 (fr)
PT (1) PT3038433T (fr)
RS (1) RS63645B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4016495A1 (fr) * 2020-12-18 2022-06-22 Siemens Mobility GmbH Procédé de diagnostic de commande

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19754222A1 (de) 1997-12-06 1999-06-10 Volkswagen Ag Vorrichtung zur Funktionskontrolle von Lumineszenzdioden
EP0974947A1 (fr) 1998-07-23 2000-01-26 Siemens Aktiengesellschaft Appareil de signalisation lumineuse et procédé de contrôle de l'appareil de signalisation
US6078148A (en) 1998-10-09 2000-06-20 Relume Corporation Transformer tap switching power supply for LED traffic signal
DE102005032719A1 (de) 2005-07-13 2007-01-25 Siemens Ag Lichtsignalanlage, insbesondere für den Straßenverkehr
EP1992524A1 (fr) 2006-03-03 2008-11-19 Toyota Jidosha Kabushikikaisya Vehicule et dispositif d'informations de vehicule
DE102010013310A1 (de) 2010-03-29 2011-09-29 Panasonic Electric Works Vossloh-Schwabe Gmbh Betriebsschaltung zum Betreiben eines Lüfters für ein Leuchtmodul
DE102010026012A1 (de) 2010-06-29 2011-12-29 Siemens Aktiengesellschaft LED-Lichtsignal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783909A (en) * 1997-01-10 1998-07-21 Relume Corporation Maintaining LED luminous intensity
US7740371B1 (en) * 1998-03-19 2010-06-22 Charles A. Lemaire Method and apparatus for pulsed L.E.D. illumination for a camera
WO2007142947A2 (fr) * 2006-05-31 2007-12-13 Cree Led Lighting Solutions, Inc. Dispositif d'éclairage avec contrôle des couleurs et procédé d'éclairage
DE102007021836A1 (de) * 2007-05-07 2008-11-20 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh LED Anordnung für Lichtsignalgeber insbesondere für Bahnübergänge sowie Lichtsignalgeber insbesondere für Bahnübergänge mit einer solchen LED-Anordnung
US8618737B2 (en) * 2008-03-17 2013-12-31 Eldolab Holding B.V. LED assembly, LED fixture, control method and software program
AU2014259974B2 (en) * 2013-04-30 2018-04-19 Digital Lumens, Incorporated Operating light emitting diodes at low temperature

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19754222A1 (de) 1997-12-06 1999-06-10 Volkswagen Ag Vorrichtung zur Funktionskontrolle von Lumineszenzdioden
EP0974947A1 (fr) 1998-07-23 2000-01-26 Siemens Aktiengesellschaft Appareil de signalisation lumineuse et procédé de contrôle de l'appareil de signalisation
US6078148A (en) 1998-10-09 2000-06-20 Relume Corporation Transformer tap switching power supply for LED traffic signal
DE102005032719A1 (de) 2005-07-13 2007-01-25 Siemens Ag Lichtsignalanlage, insbesondere für den Straßenverkehr
EP1992524A1 (fr) 2006-03-03 2008-11-19 Toyota Jidosha Kabushikikaisya Vehicule et dispositif d'informations de vehicule
DE102010013310A1 (de) 2010-03-29 2011-09-29 Panasonic Electric Works Vossloh-Schwabe Gmbh Betriebsschaltung zum Betreiben eines Lüfters für ein Leuchtmodul
DE102010026012A1 (de) 2010-06-29 2011-12-29 Siemens Aktiengesellschaft LED-Lichtsignal

Also Published As

Publication number Publication date
DE102014119623A1 (de) 2016-06-23
DK3038433T3 (da) 2022-10-24
ES2928388T3 (es) 2022-11-17
HRP20221261T1 (hr) 2022-12-09
EP3038433B1 (fr) 2022-07-13
PT3038433T (pt) 2022-10-17
HUE060173T2 (hu) 2023-02-28
PL3038433T3 (pl) 2022-12-27
RS63645B1 (sr) 2022-10-31
LT3038433T (lt) 2022-11-10
EP3038433A3 (fr) 2016-07-27

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