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EP1071312A3 - PWM driving method - Google Patents

PWM driving method Download PDF

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Publication number
EP1071312A3
EP1071312A3 EP00250222A EP00250222A EP1071312A3 EP 1071312 A3 EP1071312 A3 EP 1071312A3 EP 00250222 A EP00250222 A EP 00250222A EP 00250222 A EP00250222 A EP 00250222A EP 1071312 A3 EP1071312 A3 EP 1071312A3
Authority
EP
European Patent Office
Prior art keywords
current
driving method
pwm driving
continuous operation
maximum permissible
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Withdrawn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
EP00250222A
Other languages
German (de)
French (fr)
Other versions
EP1071312A2 (en
Inventor
Peter Hobik
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1071312A2 publication Critical patent/EP1071312A2/en
Publication of EP1071312A3 publication Critical patent/EP1071312A3/en
Withdrawn legal-status Critical Current

Links

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
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Control Of El Displays (AREA)

Abstract

Die Erfindung betrifft ein PWM-Ansteuerverfahren sowie eine entsprechende Ansteuereinrichtung zur Beeinflussung der Helligkeit von Leuchtkörpern oder Leuchtmitteln, umfassend eine Spannungs-oder Stromquelle zur Erzeugung von Strompulsen, wobei die Stromstärke IMAX der Strompulse größer als die maximal zulässige Stromstärke IG für Dauerbetrieb ist, wobei der arithmetische Mittelwert gleich der maximal zulässigen Stromstärke IG für Dauerbetrieb ist.

Figure 00000001
The invention relates to a PWM control method and a corresponding control device for influencing the brightness of luminous elements or illuminants, comprising a voltage or current source for generating current pulses, the current intensity I MAX of the current pulses being greater than the maximum permissible current strength I G for continuous operation, the arithmetic mean being equal to the maximum permissible current I G for continuous operation.
Figure 00000001
EP00250222A 1999-07-19 2000-07-07 PWM driving method Withdrawn EP1071312A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19933733A DE19933733B4 (en) 1999-07-19 1999-07-19 PWM driving
DE19933733 1999-07-19

Publications (2)

Publication Number Publication Date
EP1071312A2 EP1071312A2 (en) 2001-01-24
EP1071312A3 true EP1071312A3 (en) 2001-08-16

Family

ID=7915244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00250222A Withdrawn EP1071312A3 (en) 1999-07-19 2000-07-07 PWM driving method

Country Status (2)

Country Link
EP (1) EP1071312A3 (en)
DE (1) DE19933733B4 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027478A1 (en) * 2000-06-02 2001-12-06 Hella Kg Hueck & Co Lighting device for a motor vehicle
GB2377099B (en) * 2001-06-29 2004-12-29 Motorola Inc Lighting system and method
FR2831382B1 (en) * 2001-10-19 2008-12-26 Valeo Vision ELECTROLUMINESCENT DIODE LIGHTING OR SIGNALING DEVICE
DE102007002809A1 (en) 2007-01-18 2008-07-24 Hella Kgaa Hueck & Co. Method for pulsed operation of lighting unit with light emitting diodes for motor vehicles, involves dephasing of pulse mode of two light-emitting diodes of two groups
DE102007031800A1 (en) * 2007-07-07 2009-01-08 Bayerische Motoren Werke Aktiengesellschaft Automotive lighting system
DE102009000289A1 (en) 2008-02-08 2009-08-20 Volkswagen Ag Controlled light intensity illumination assembly and method of controlling light intensity
WO2010041265A2 (en) * 2008-06-26 2010-04-15 Ledtrics Lighting Private Limited Led driver and lighting system using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005311A1 (en) * 1978-03-10 1979-11-14 Lear Siegler, Inc. Method and apparatus for regulating the power supplied to an electrical load
FR2711884A1 (en) * 1993-10-29 1995-05-05 Solartec Sarl Signalling device, in particular for road, aeronautical or maritime signalling
US5783909A (en) * 1997-01-10 1998-07-21 Relume Corporation Maintaining LED luminous intensity
US5850126A (en) * 1997-04-11 1998-12-15 Kanbar; Maurice S. Screw-in led lamp
DE19918336A1 (en) * 1999-04-22 2000-11-02 Sickinger Monika Light source from several LEDs connected in series

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837484B2 (en) * 1979-09-25 1983-08-16 日産自動車株式会社 Automotive electronic meter brightness control device
DE3903047A1 (en) * 1989-02-02 1990-08-09 Priesemuth W ARRANGEMENT FOR DETERMINING THE BRAKE CONDITION OF VEHICLES
JPH0732941A (en) * 1993-07-15 1995-02-03 Alps Electric Co Ltd Protective circuit of lighting system for automobile
DE4444728A1 (en) * 1994-12-15 1995-09-21 Telefunken Microelectron Operation of automobile brake lamps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0005311A1 (en) * 1978-03-10 1979-11-14 Lear Siegler, Inc. Method and apparatus for regulating the power supplied to an electrical load
FR2711884A1 (en) * 1993-10-29 1995-05-05 Solartec Sarl Signalling device, in particular for road, aeronautical or maritime signalling
US5783909A (en) * 1997-01-10 1998-07-21 Relume Corporation Maintaining LED luminous intensity
US5850126A (en) * 1997-04-11 1998-12-15 Kanbar; Maurice S. Screw-in led lamp
DE19918336A1 (en) * 1999-04-22 2000-11-02 Sickinger Monika Light source from several LEDs connected in series

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FRISCH & AL: "Lumineszenzdioden im getakteten Betrieb", ELEKTRONIK, vol. 31, no. 23, November 1982 (1982-11-01), münchen, pages 55 - 59, XP002159398 *

Also Published As

Publication number Publication date
EP1071312A2 (en) 2001-01-24
DE19933733A1 (en) 2001-01-25
DE19933733B4 (en) 2010-10-21

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