EP0948241A3 - Method and apparatus for supplying power to light emitting diodes - Google Patents

Method and apparatus for supplying power to light emitting diodes Download PDF

Info

Publication number
EP0948241A3
EP0948241A3 EP99660053A EP99660053A EP0948241A3 EP 0948241 A3 EP0948241 A3 EP 0948241A3 EP 99660053 A EP99660053 A EP 99660053A EP 99660053 A EP99660053 A EP 99660053A EP 0948241 A3 EP0948241 A3 EP 0948241A3
Authority
EP
European Patent Office
Prior art keywords
light emitting
current
emitting diodes
circuit
main circuit
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Withdrawn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
EP99660053A
Other languages
German (de)
French (fr)
Other versions
EP0948241A2 (en
Inventor
Heikki Pienisaari
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.)
Teknoware Oy
Original Assignee
Teknoware Oy
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 Teknoware Oy filed Critical Teknoware Oy
Publication of EP0948241A2 publication Critical patent/EP0948241A2/en
Publication of EP0948241A3 publication Critical patent/EP0948241A3/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Withdrawn legal-status Critical Current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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output

Landscapes

  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention relates to a method and an apparatus for supplying power to light emitting diodes connected to a light emitting diode matrix (MN) comprising one or more parallel connected light emitting diodes or a series connection thereof. The method comprises repeated phases where the amount of current in the main circuit formed of a series connection of the light emitting diode matrix (MN), a switching element (K1) and an inductance (N1) is monitored, the main circuit is opened by the switching element (K1) when the current of the main circuit reaches a predetermined value, whereby the current starts flowing through a zero diode circuit formed of a zero diode (D1) arranged on a circuit, the amount of current in the zero diode circuit is monitored, and the main circuit is closed by the switching element (K1) when the zero diode circuit current reaches a predetermined value.
EP99660053A 1998-03-30 1999-03-25 Method and apparatus for supplying power to light emitting diodes Withdrawn EP0948241A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI980717 1998-03-30
FI980717A FI104034B1 (en) 1998-03-30 1998-03-30 Method and device for supplying power to light emitting diodes

Publications (2)

Publication Number Publication Date
EP0948241A2 EP0948241A2 (en) 1999-10-06
EP0948241A3 true EP0948241A3 (en) 2000-12-27

Family

ID=8551412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99660053A Withdrawn EP0948241A3 (en) 1998-03-30 1999-03-25 Method and apparatus for supplying power to light emitting diodes

Country Status (2)

Country Link
EP (1) EP0948241A3 (en)
FI (1) FI104034B1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106770B (en) * 1999-01-22 2001-03-30 Nokia Mobile Phones Ltd Illuminating electronic device and illumination method
US7071762B2 (en) * 2001-01-31 2006-07-04 Koninklijke Philips Electronics N.V. Supply assembly for a led lighting module
DE10262387B3 (en) * 2002-07-04 2016-01-21 Tridonic Ag Power supply for light-emitting diodes
US8063575B2 (en) 2002-07-04 2011-11-22 Tridonic Jennersdorf Gmbh Current supply for luminescent diodes
DE10230103B4 (en) * 2002-07-04 2012-10-31 Tridonic Ag Power supply for light-emitting diodes
DE102006034371B4 (en) 2006-04-21 2019-01-31 Tridonic Ag Operating circuit and operating method for light-emitting diodes
DE102006030655A1 (en) 2006-04-21 2007-10-25 Tridonicatco Gmbh & Co. Kg Emergency lighting device for operating a light source, in particular an LED
DE102008039351B3 (en) * 2008-08-22 2010-01-28 Osram Gesellschaft mit beschränkter Haftung Circuit arrangement for operating at least one semiconductor light source
WO2010045666A1 (en) 2008-10-20 2010-04-29 Tridonicatco Gmbh & Co Kg Operating connection for light emitting diodes
DE112009002593A5 (en) 2008-10-20 2011-09-29 Tridonic Ag Operating circuit for LEDs
EP2347633A1 (en) 2008-10-20 2011-07-27 Tridonic AG Operating circuit for light-emitting diodes
AT508195B1 (en) * 2009-04-30 2012-03-15 Tridonic Gmbh & Co Kg OPERATING CIRCUIT FOR LIGHT DIODES
DE102009042419B4 (en) * 2009-09-21 2011-12-15 Osram Gesellschaft mit beschränkter Haftung Circuit arrangement for operating at least one LED
DE102010031247A1 (en) * 2010-03-19 2011-09-22 Tridonic Ag Low voltage power supply for a LED lighting system
DE102013207562A1 (en) * 2013-04-25 2014-10-30 Tridonic Gmbh & Co Kg Operating circuit for LEDs with voltage measurement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439151A1 (en) * 1990-01-23 1991-07-31 Hughes Aircraft Company A high efficiency power converter employing a synchronized switching system
DE4022498A1 (en) * 1990-07-14 1992-01-16 Stahl R Schaltgeraete Gmbh Explosion protected warning light - has light element in series circuit, contg. inductance, electronic switch and current
FR2751805A1 (en) * 1996-07-24 1998-01-30 Schneider Electric Sa Self-oscillating step=down converter with complete demagnetisation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439151A1 (en) * 1990-01-23 1991-07-31 Hughes Aircraft Company A high efficiency power converter employing a synchronized switching system
DE4022498A1 (en) * 1990-07-14 1992-01-16 Stahl R Schaltgeraete Gmbh Explosion protected warning light - has light element in series circuit, contg. inductance, electronic switch and current
FR2751805A1 (en) * 1996-07-24 1998-01-30 Schneider Electric Sa Self-oscillating step=down converter with complete demagnetisation

Also Published As

Publication number Publication date
FI104034B (en) 1999-10-29
EP0948241A2 (en) 1999-10-06
FI980717A0 (en) 1998-03-30
FI104034B1 (en) 1999-10-29
FI980717A (en) 1999-10-01

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