EP1843639A1 - Appareil pour une lampe de véhicule à LEDs - Google Patents

Appareil pour une lampe de véhicule à LEDs Download PDF

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Publication number
EP1843639A1
EP1843639A1 EP06007263A EP06007263A EP1843639A1 EP 1843639 A1 EP1843639 A1 EP 1843639A1 EP 06007263 A EP06007263 A EP 06007263A EP 06007263 A EP06007263 A EP 06007263A EP 1843639 A1 EP1843639 A1 EP 1843639A1
Authority
EP
European Patent Office
Prior art keywords
light emitting
emitting module
emitting diode
car lamp
lamp apparatus
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Withdrawn
Application number
EP06007263A
Other languages
German (de)
English (en)
Inventor
Chien-Cheng Lin
I-Nan Lin
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.)
Kwang Yang Motor Co Ltd
Original Assignee
Kwang Yang Motor Co Ltd
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 Kwang Yang Motor Co Ltd filed Critical Kwang Yang Motor Co Ltd
Priority to EP06007263A priority Critical patent/EP1843639A1/fr
Publication of EP1843639A1 publication Critical patent/EP1843639A1/fr
Withdrawn legal-status Critical Current

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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
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • 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
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines

Definitions

  • the present invention generally relates to car lamps, and more particularly to a light emitting diode (LED) car lamp apparatus having a control circuit capable of discovering the variation of electrical properties of a light emitting module while at least one LED unit fails and then forcing the rest of the LED units to lose all of their power supply.
  • LED light emitting diode
  • a lamp driving circuit 4 includes a controller 40 coupled to a plurality of LED lamp strings 41 connected in parallel with each other for controlling the light emitting status of the LED lamp strings 41, and each LED lamp strings 41 is comprised of a plurality of light emitting diodes (LEDs) 410 connected in series with each other. Since manufacturers generally take the consideration of the LED 410 that will break down after being used for a while or by other reasons, the design of a car lamp usually keeps the rest of the LED lamp strings 41 working and shows a specific brightness, if any one of the LED 410 fails, and only the failed LED 410 of its respective LED lamp string 41 will go out. Therefore, drivers still can continue driving the motor vehicle until all of the rest of the LED lamp strings 41 break down or go out or the coverage of the light no longer meets the safe driving requirements, and then the drivers will replace the failed LED lamp strings 41.
  • LEDs light emitting diodes
  • the inventor of the present invention based on years of experience in the related industry to conduct extensive researches and experiments, and finally invented a light emitting diode car lamp apparatus in accordance with the present invention to help drivers to determine the emitting light brightness conveniently and easily, so as to control the timing of replacing the car lamps.
  • a primary objective of the present invention to provide a light emitting diode, car lamp apparatus that comprises a control circuit and a light emitting module, and the control circuit is coupled separately to a power supply unit and the light emitting module.
  • the light emitting module includes a plurality of LED units connected in parallel with each other, and each LED unit is comprised of a plurality of light emitting diodes connected in series with each other.
  • the control circuit sets a tolerance, and the control circuit detects the light emitting module to obtain a detected value.
  • the control circuit will force the rest of the LED units to lose all of their power supply, and thus drivers do not have to determine visually whether or not it is necessary to replace the LED unit, and the invention provides a convenient, simple and easy way to identify whether or not the light emitting diode car lamp apparatus is operating properly, so as to timely maintain or replace the car lamp.
  • the light emitting diode car lamp apparatus 1 comprises a control circuit 10 and a light emitting module 20 (such as a tail lamp module), and the control circuit 10 with a tolerance (such as a conditional content) is coupled separately to a power supply unit 30 (such as a battery) and the light emitting module 20.
  • the light emitting module 20 detects a detected value (such as a current value or a voltage different value), and the light emitting module 20 includes a plurality of LED units 21 (such as LED lamp strings), and the LED units 21 are connected in parallel and jointly connected to the control circuit 10 in series.
  • the detected value of the light emitting module 20 will change. If the LED unit 21 breaks down and the control circuit 10 discovers that the detected value does not match the tolerance, the control circuit 10 will force the rest of the LED units 21 to lose all of their power supply as well as the light emitting characteristic, so that users can easily determine that the LED units 21 in the light emitting diode car lamp apparatus 1 have lost their light emitting effect.
  • the control circuit 10 is divided into a controller unit 11, an induced resistor 12 and a relay unit 13, wherein the controller unit 11 is coupled to the power supply unit 30 and sets a tolerance for a current value or a voltage difference value of a current passing through the light emitting module 20 when several or all of the LED units 21 emit lights, and the induced resistor 12 is coupled separately to the controller unit 11 and the relay unit 13 for detecting the light emitting module 20 to obtain the detected value, and the relay unit 13 is coupled to the light emitting module 20. If any one of the LED units 21 fails and cannot emit light, the controller unit 11 will compare the detected value obtained by the induced resistor 12 with the tolerance. If the detected value does not match the tolerance, the relay unit 13 will disconnect the power supply of the light emitting module 20, so that the light emitting module 20 and the control circuit 10 form a break circuit, and all of the LED units 21 lose their light emitting characteristic.
  • the controller unit 11 is a microcontroller unit having a plurality of pins connected externally, wherein the pins include a first pin 111, a second pin 112, and a third pin 113, and the first pin 111 is coupled to the power supply unit 30, and the first pin 111 and second pin 112 are coupled to both ends of the induced resistor 12 for transmitting back an input value and an output value respectively and comparing the input value and output value from the first pin 111 and second pin 112 to obtain the detected value.
  • the controller unit 11 finds out that the detected value obtained from both ends of the induced resistor 12 does not match the tolerance, the controller unit 11 will drive the relay unit 13 to disconnect the power supply of the light emitting module 20, so that the light emitting module 20 and the control circuit 10 form a break circuit, and all of the LED units 21 lose their light emitting characteristic.
  • the third pin 113 is coupled to the relay unit 13 for noticing the relay unit 13 to disconnect the power supply of the light emitting module 20.
  • the relay unit 13 includes a relay switch 131 and a loop control element 132, and the relay switch 131 is installed between the light emitting module 20 and the induced resistor 12, and the loop control element 132 is coupled separately to the relay switch 131 and the third pin 113, and the loop control element 132 can receive a notice from the third pin 113 to issue a start signal to the relay switch 131 to drive the light emitting module 20 and the control circuit 10 to form a break circuit.
  • the light emitting module 20 includes five sets of LED units connected in parallel with each other and each LED unit 21 includes five light emitting diodes (LEDs) 211 such as LED bulbs connected in series with each other. If any LED 211 of an LED unit 21 breaks down and goes out, then the LED 211 of its respective LED unit 21 will not work anymore and lose its light emitting characteristic.
  • LEDs light emitting diodes
  • the controller unit 11 will compare the current value (which is the detected value) transmitted back from the first pin 111 and the second pin 112 with a current value (which is the tolerance) of a current passing through the light emitting module 20, if not all of the LED units 21 emit light, and the controller unit 11 will send a start signal from the third pin 113 through the loop control element 132 to enable the relay switch 131, so that the relay switch 131 will disconnect the power supply of the light emitting module 20, and the rest four set of LED units 21 connected in parallel with each other will lose their light emitting characteristic as well.
  • the tolerance can be set as a current value or a voltage difference value of a current passing through the light emitting module 20 when a specific quantity of LED units 21 emit light, and the specific quantity is the quantity required for the brightness in compliance with the safe driving requirements, and thus the detected valued obtained by the controller unit 11 from both ends of the induced resistor 12 does not match the tolerance, and the third pin 113 will send the start signal to the relay unit 13 to disconnect the power supply of the light emitting module 20. For example, if any two of the LED units 21 breaks down and cannot emit light, the detected value will remain within the range of the tolerance. In other words, the controller unit 11 still will not drive the relay unit 13 to disconnect the power supply of the light emitting module 20.
  • the present invention just needs to identify whether or not the light emitting diode car lamp apparatus 1 emits light to determine a proper operation of the light emitting diode car lamp apparatus 1, so as to provide a convenient and easy way to determine the light brightness and timely maintain or replace the car lamp.
  • the present invention can be applied to a tail lamp of a transportation means, such that if a small quantity of LED units 21 of the tail lamp breaks down, the whole tail lamp will be forced to stop its operating function, and thus providing drivers a convenient and easy way to determine whether or not the light emitting diode car lamp apparatus 1 is working properly.
  • the control circuit 10 is only a general conceptual name used in the invention, and any measure or element used for detecting the change of the power supply of the light emitting module 20 to force the light emitting module 20 to lose their light emitting function is covered by the scope of the claims of this invention.
EP06007263A 2006-04-06 2006-04-06 Appareil pour une lampe de véhicule à LEDs Withdrawn EP1843639A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06007263A EP1843639A1 (fr) 2006-04-06 2006-04-06 Appareil pour une lampe de véhicule à LEDs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06007263A EP1843639A1 (fr) 2006-04-06 2006-04-06 Appareil pour une lampe de véhicule à LEDs

Publications (1)

Publication Number Publication Date
EP1843639A1 true EP1843639A1 (fr) 2007-10-10

Family

ID=36926822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06007263A Withdrawn EP1843639A1 (fr) 2006-04-06 2006-04-06 Appareil pour une lampe de véhicule à LEDs

Country Status (1)

Country Link
EP (1) EP1843639A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029930B3 (de) * 2009-06-19 2010-11-25 Heraeus Noblelight Gmbh Verfahren zur Erkennung eines Ausfalls zumindest einer LED
JP5266594B1 (ja) * 2012-10-25 2013-08-21 株式会社エム・システム技研 Ｌｅｄランプ、そのｌｅｄランプを含む照明装置、及び、ｌｅｄランプの電流制御方法
US20130304304A1 (en) * 2010-10-26 2013-11-14 Automotive Lighting Reutlingen Gmbh Combination of an on-board power supply control device and at least one light control device of a motor vehicle
CN108534089A (zh) * 2018-04-12 2018-09-14 上海小糸车灯有限公司 日间行车灯联动控制策略和日间行车灯

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6236331B1 (en) * 1998-02-20 2001-05-22 Newled Technologies Inc. LED traffic light intensity controller
US20020140380A1 (en) * 2001-03-28 2002-10-03 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Drive circuit for an LED array
US20030025465A1 (en) * 1999-12-23 2003-02-06 Stmicroelectronics, Inc. LED driver circuit and method
US6570505B1 (en) * 1997-12-30 2003-05-27 Gelcore Llc LED lamp with a fault-indicating impedance-changing circuit
WO2004057924A1 (fr) * 2002-12-19 2004-07-08 Koninklijke Philips Electronics N.V. Pilote de diodes electroluminescentes
US20050116665A1 (en) * 2003-09-09 2005-06-02 Pentair Pool Products, Inc. Controller circuit
WO2005079121A2 (fr) * 2004-02-11 2005-08-25 Peter Bhagat Appareil de commande d'eclairage et procedes associes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570505B1 (en) * 1997-12-30 2003-05-27 Gelcore Llc LED lamp with a fault-indicating impedance-changing circuit
US6236331B1 (en) * 1998-02-20 2001-05-22 Newled Technologies Inc. LED traffic light intensity controller
US20030025465A1 (en) * 1999-12-23 2003-02-06 Stmicroelectronics, Inc. LED driver circuit and method
US20020140380A1 (en) * 2001-03-28 2002-10-03 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Drive circuit for an LED array
WO2004057924A1 (fr) * 2002-12-19 2004-07-08 Koninklijke Philips Electronics N.V. Pilote de diodes electroluminescentes
US20050116665A1 (en) * 2003-09-09 2005-06-02 Pentair Pool Products, Inc. Controller circuit
WO2005079121A2 (fr) * 2004-02-11 2005-08-25 Peter Bhagat Appareil de commande d'eclairage et procedes associes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029930B3 (de) * 2009-06-19 2010-11-25 Heraeus Noblelight Gmbh Verfahren zur Erkennung eines Ausfalls zumindest einer LED
US20130304304A1 (en) * 2010-10-26 2013-11-14 Automotive Lighting Reutlingen Gmbh Combination of an on-board power supply control device and at least one light control device of a motor vehicle
US9308821B2 (en) * 2010-10-26 2016-04-12 Automotive Lighting Reutlingen Gmbh Internal power supply control device having at least one lighting control device for a motor vehicle
JP5266594B1 (ja) * 2012-10-25 2013-08-21 株式会社エム・システム技研 Ｌｅｄランプ、そのｌｅｄランプを含む照明装置、及び、ｌｅｄランプの電流制御方法
WO2014064813A1 (fr) * 2012-10-25 2014-05-01 株式会社エム・システム技研 Lampe à del, dispositif d'éclairage comprenant la lampe à del, et procédé de commande de courant électrique de lampe à del
CN103907209A (zh) * 2012-10-25 2014-07-02 爱模系统有限公司 Led灯、包括该led灯的照明装置、以及led灯的电流控制方法
US8779679B2 (en) 2012-10-25 2014-07-15 M-System Co., Ltd. LED lamp, illumination device including the LED lamp and current control method of the LED lamp
EP2793276A4 (fr) * 2012-10-25 2015-09-23 M system co ltd Lampe à del, dispositif d'éclairage comprenant la lampe à del, et procédé de commande de courant électrique de lampe à del
CN103907209B (zh) * 2012-10-25 2015-10-21 爱模系统有限公司 Led灯、包括该led灯的照明装置、以及led灯的电流控制方法
CN108534089A (zh) * 2018-04-12 2018-09-14 上海小糸车灯有限公司 日间行车灯联动控制策略和日间行车灯

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