WO2008022270A3 - Method and apparatus for controlling an input voltage to a light emitting diode - Google Patents

Method and apparatus for controlling an input voltage to a light emitting diode Download PDF

Info

Publication number
WO2008022270A3
WO2008022270A3 PCT/US2007/076122 US2007076122W WO2008022270A3 WO 2008022270 A3 WO2008022270 A3 WO 2008022270A3 US 2007076122 W US2007076122 W US 2007076122W WO 2008022270 A3 WO2008022270 A3 WO 2008022270A3
Authority
WO
WIPO (PCT)
Prior art keywords
controlling
input voltage
led
light emitting
emitting diode
Prior art date
Application number
PCT/US2007/076122
Other languages
French (fr)
Other versions
WO2008022270A2 (en
Inventor
Kevin Hebborn
Original Assignee
Dialight Corp
Kevin Hebborn
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 Dialight Corp, Kevin Hebborn filed Critical Dialight Corp
Priority to EP07841024.8A priority Critical patent/EP2054873B1/en
Priority to CA2661208A priority patent/CA2661208C/en
Publication of WO2008022270A2 publication Critical patent/WO2008022270A2/en
Publication of WO2008022270A3 publication Critical patent/WO2008022270A3/en

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
    • H05B45/347—Dynamic headroom control [DHC]
    • 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
    • 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
    • H05B45/395—Linear regulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Led Devices (AREA)

Abstract

A method and apparatus for controlling an input voltage to a light emitting diode (LED) is disclosed. In one embodiment a system for controlling an input voltage to at least one LED includes an energy storage device. The energy storage device is coupled to the at least one LED. A current regulator is coupled the at least one LED for controlling activation and deactivation of the at least one LED. A control circuit is coupled to the current regulator for controlling a power supply providing an input voltage to the energy storage device, wherein the input voltage is provided in accordance with an amount of a headroom voltage measured across the current regulator.
PCT/US2007/076122 2006-08-18 2007-08-16 Method and apparatus for controlling an input voltage to a light emitting diode WO2008022270A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07841024.8A EP2054873B1 (en) 2006-08-18 2007-08-16 Method and apparatus for controlling an input voltage to a light emitting diode
CA2661208A CA2661208C (en) 2006-08-18 2007-08-16 Method and apparatus for controlling an input voltage to a light emitting diode

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83893806P 2006-08-18 2006-08-18
US60/838,938 2006-08-18

Publications (2)

Publication Number Publication Date
WO2008022270A2 WO2008022270A2 (en) 2008-02-21
WO2008022270A3 true WO2008022270A3 (en) 2008-06-19

Family

ID=39083145

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/076122 WO2008022270A2 (en) 2006-08-18 2007-08-16 Method and apparatus for controlling an input voltage to a light emitting diode

Country Status (4)

Country Link
US (1) US7777424B2 (en)
EP (1) EP2054873B1 (en)
CA (1) CA2661208C (en)
WO (1) WO2008022270A2 (en)

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US8027799B2 (en) * 2007-11-28 2011-09-27 Honeywell International Inc. Digital potentiometer system
DE102009018098A1 (en) 2009-04-20 2010-10-21 Austriamicrosystems Ag Charging circuit for a charge storage and method for loading such
EP2315497A1 (en) 2009-10-09 2011-04-27 Nxp B.V. An LED driver circuit having headroom/dropout voltage control and power factor correction
US9491822B2 (en) * 2010-10-01 2016-11-08 Intersil Americas LLC LED driver with adaptive dynamic headroom voltage control
EP2512207B1 (en) * 2011-04-15 2013-06-05 ATLAS Elektronik GmbH Driver circuit and method for powering an LED and illuminant
US8476847B2 (en) 2011-04-22 2013-07-02 Crs Electronics Thermal foldback system
US8669711B2 (en) 2011-04-22 2014-03-11 Crs Electronics Dynamic-headroom LED power supply
US8669715B2 (en) 2011-04-22 2014-03-11 Crs Electronics LED driver having constant input current
US8723425B2 (en) 2011-06-17 2014-05-13 Stevan Pokrajac Light emitting diode driver circuit
DE102011112455A1 (en) * 2011-09-03 2013-03-07 Vision Components Gesellschaft für Bildverarbeitungsysteme mbH Method for supplying power to LED in e.g. camera for image processing system, involves controlling output voltage of switching regulator by measured voltage drop as feedback signal during measuring period
US9578728B2 (en) * 2013-06-18 2017-02-21 Dialight Corporation Long life, fail safe traffic light
DE102014205469A1 (en) * 2014-03-24 2015-09-24 Osram Gmbh Circuit arrangement and method for operating semiconductor light sources
CN106165540B (en) 2014-03-24 2018-12-04 欧司朗股份有限公司 For running the circuit device and method of semiconductor light source
US9520742B2 (en) 2014-07-03 2016-12-13 Hubbell Incorporated Monitoring system and method
US20170151989A1 (en) * 2015-11-30 2017-06-01 Robert W. Daniels Wearable LED warning light a safety device and turn signal lights utility belt
US20170250547A1 (en) * 2016-02-26 2017-08-31 906 Engineering Corporation Supercapacitor supply bank, charging system and methods
NL2019587B1 (en) * 2017-09-20 2019-03-28 Eldolab Holding Bv LED driver and method
EP3540703B1 (en) 2018-03-16 2024-04-24 Carrier Corporation Single stage current controller for a notification appliance
DE102019005029A1 (en) * 2019-07-18 2021-01-21 Giesecke+Devrient Currency Technology Gmbh LIGHT SOURCE DRIVER CIRCUIT, OPTICAL MEASURING DEVICE WITH THE LIGHT SOURCE DRIVER CIRCUIT, DEVICE FOR CHECKING VALUE DOCUMENTS, AND METHOD OF OPERATING A LIGHT SOURCE LOAD USING THE LIGHT SOURCE DRIVER CIRCUIT

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040155844A1 (en) * 2003-02-07 2004-08-12 Whelen Engineering Company, Inc. LED driver circuits

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
JP4177022B2 (en) * 2002-05-07 2008-11-05 ローム株式会社 LIGHT EMITTING ELEMENT DRIVE DEVICE AND ELECTRONIC DEVICE HAVING LIGHT EMITTING ELEMENT
US6690146B2 (en) 2002-06-20 2004-02-10 Fairchild Semiconductor Corporation High efficiency LED driver
JP2005006444A (en) * 2003-06-13 2005-01-06 Japan Aviation Electronics Industry Ltd Power supply device for illumination lamp
JP4163079B2 (en) 2003-09-12 2008-10-08 ローム株式会社 Light emission control circuit
JP4342262B2 (en) 2003-10-03 2009-10-14 アルエイド株式会社 LED lighting control device and LED lighting control method
US7057359B2 (en) * 2003-10-28 2006-06-06 Au Optronics Corporation Method and apparatus for controlling driving current of illumination source in a display system
JP4308158B2 (en) 2004-03-30 2009-08-05 ローム株式会社 Boost control device and electronic device using the same
TWI236169B (en) 2004-11-19 2005-07-11 Quanta Comp Inc Driving device for light emitted diode
US7323828B2 (en) * 2005-04-25 2008-01-29 Catalyst Semiconductor, Inc. LED current bias control using a step down regulator
US7317403B2 (en) 2005-08-26 2008-01-08 Philips Lumileds Lighting Company, Llc LED light source for backlighting with integrated electronics
US20070273681A1 (en) 2006-05-24 2007-11-29 Mayell Robert J Method and apparatus to power light emitting diode arrays

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040155844A1 (en) * 2003-02-07 2004-08-12 Whelen Engineering Company, Inc. LED driver circuits

Also Published As

Publication number Publication date
EP2054873A2 (en) 2009-05-06
EP2054873B1 (en) 2018-04-04
CA2661208C (en) 2013-07-02
EP2054873A4 (en) 2010-04-21
US7777424B2 (en) 2010-08-17
CA2661208A1 (en) 2008-02-21
WO2008022270A2 (en) 2008-02-21
US20080042597A1 (en) 2008-02-21

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