WO2009044340A3 - Method and circuit arrangement for determining the light output level of a led - Google Patents

Method and circuit arrangement for determining the light output level of a led Download PDF

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Publication number
WO2009044340A3
WO2009044340A3 PCT/IB2008/053977 IB2008053977W WO2009044340A3 WO 2009044340 A3 WO2009044340 A3 WO 2009044340A3 IB 2008053977 W IB2008053977 W IB 2008053977W WO 2009044340 A3 WO2009044340 A3 WO 2009044340A3
Authority
WO
WIPO (PCT)
Prior art keywords
led
circuit arrangement
determining
power value
pth
Prior art date
Application number
PCT/IB2008/053977
Other languages
French (fr)
Other versions
WO2009044340A2 (en
Inventor
Gian Hoogzaad
Original Assignee
Nxp Bv
Gian Hoogzaad
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 Nxp Bv, Gian Hoogzaad filed Critical Nxp Bv
Publication of WO2009044340A2 publication Critical patent/WO2009044340A2/en
Publication of WO2009044340A3 publication Critical patent/WO2009044340A3/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
    • H05B31/00—Electric arc lamps
    • H05B31/48—Electric arc lamps having more than two electrodes
    • H05B31/50—Electric arc lamps having more than two electrodes specially adapted for ac
    • 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]
    • H05B45/20—Controlling the colour of the light
    • H05B45/24—Controlling the colour 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]
    • H05B45/20—Controlling the colour of the light
    • 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]
    • H05B45/20—Controlling the colour of the light
    • H05B45/28—Controlling the colour of the light using temperature feedback

Abstract

The invention provides a method for determining the light output level of a light emitting diode (LED), the LED being operated with a voltage over the LED and a current through the LED. The method uses obtaining (100) an LED input electrical power value (Pin) to the LED, obtaining (102) an a thermal power value (Pth), and determining (104) a LED output power from at least the input electrical power value (Pin) and the thermal power value (Pth). The thermal power value (Pth) is obtained using a temperature difference value between the temperature values measured at two different locations and a thermal resistance value (Rth). The invention also provides a circuit arrangement using the method, a LED driver IC using the circuit arrangement and a lighting system with at least one LED and such a circuit arrangement.
PCT/IB2008/053977 2007-10-02 2008-09-30 Method and circuit arrangement for determining the light output level of a led WO2009044340A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07117732.3 2007-10-02
EP07117732 2007-10-02

Publications (2)

Publication Number Publication Date
WO2009044340A2 WO2009044340A2 (en) 2009-04-09
WO2009044340A3 true WO2009044340A3 (en) 2009-08-06

Family

ID=40526779

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/053977 WO2009044340A2 (en) 2007-10-02 2008-09-30 Method and circuit arrangement for determining the light output level of a led

Country Status (1)

Country Link
WO (1) WO2009044340A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120029435A (en) 2009-05-20 2012-03-26 코닌클리즈케 필립스 일렉트로닉스 엔.브이. Light module
EP2296436B1 (en) 2009-09-07 2018-11-14 Nxp B.V. System and method for output flux measurement of a light emitting diode
US8605763B2 (en) 2010-03-31 2013-12-10 Microsoft Corporation Temperature measurement and control for laser and light-emitting diodes
TWI518736B (en) * 2010-03-31 2016-01-21 Ａｔｓ自動模具系統股份有限公司 Light generator systems and methods
CN105704858B (en) * 2010-11-05 2018-03-23 香港城市大学 Driver for two or more parallel connection LED lamp strings
US10342446B2 (en) 2011-11-30 2019-07-09 Welch Allyn, Inc. Thermal powered medical device
DE102013207525A1 (en) * 2013-04-25 2014-10-30 Zumtobel Lighting Gmbh Method and circuit arrangement for operating an LED light source
AT517625A1 (en) * 2015-09-07 2017-03-15 Mat Center Leoben Forschung Gmbh Method and device for monitoring a semiconductor module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1339263A1 (en) * 2002-02-22 2003-08-27 Oxley Developments Company Limited Led drive circuit and method
US20040021859A1 (en) * 2002-08-01 2004-02-05 Cunningham David W. Method for controlling the luminous flux spectrum of a lighting fixture
US20060028155A1 (en) * 2004-08-09 2006-02-09 Dialight Corporation Intelligent drive circuit for a light emitting diode (LED) light engine
WO2009026983A1 (en) * 2007-08-24 2009-03-05 Ledon Lighting Gmbh Method for determining the luminous flux of a light source

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1339263A1 (en) * 2002-02-22 2003-08-27 Oxley Developments Company Limited Led drive circuit and method
US20040021859A1 (en) * 2002-08-01 2004-02-05 Cunningham David W. Method for controlling the luminous flux spectrum of a lighting fixture
US20060028155A1 (en) * 2004-08-09 2006-02-09 Dialight Corporation Intelligent drive circuit for a light emitting diode (LED) light engine
WO2009026983A1 (en) * 2007-08-24 2009-03-05 Ledon Lighting Gmbh Method for determining the luminous flux of a light source

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
FARKAS G ET AL: "Electric and thermal transient effects in high power optical devices", SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENT SYMPOSIUM, 2004. TWEN TIETH ANNUAL IEEE SAN JOSE, CA, USA MARCH 9-11, 2004, PISCATAWAY, NJ, USA,IEEE, 9 March 2004 (2004-03-09), pages 169 - 177, XP010714815, ISBN: 978-0-7803-8364-7 *
LAN KIM ET AL: "Implementation of Side Effects in Thermal Characterization of RGB Full-Color LEDs", IEEE ELECTRON DEVICE LETTERS, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 28, no. 7, 1 July 2007 (2007-07-01), pages 578 - 580, XP011186070, ISSN: 0741-3106 *
LAN KIM ET AL: "Thermal Resistance Analysis of High Power LEDs with Multi-chip Package", ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE 2006, 56TH SAN DIEGO, CA MAY 30 - JUNE 2, 2006, PISCATAWAY, NJ, USA,IEEE, 30 May 2006 (2006-05-30), pages 1076 - 1081, XP010923516, ISBN: 978-1-4244-0152-9 *
LAN KIM ET AL: "Thermal resistance measurement of LEDswith multi-chip packages", SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENT SYMPOSIUM, TWENTY-SEC OND ANNUAL IEEE DALLAS, TX USA MARCH 14-16, 2006, PISCATAWAY, NJ, USA,IEEE, 14 March 2006 (2006-03-14), pages 186 - 190, XP010912402, ISBN: 978-1-4244-0153-6 *
POPPE A ET AL: "Multi-domain simulation and measurement of power LED-s and power LED assemblies", SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENT SYMPOSIUM, TWENTY-SEC OND ANNUAL IEEE DALLAS, TX USA MARCH 14-16, 2006, PISCATAWAY, NJ, USA,IEEE, 14 March 2006 (2006-03-14), pages 191 - 198, XP010912403, ISBN: 978-1-4244-0153-6 *
TREURNIET T ET AL: "Thermal management in color variable multi-chip led modules", SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENT SYMPOSIUM, TWENTY-SEC OND ANNUAL IEEE DALLAS, TX USA MARCH 14-16, 2006, PISCATAWAY, NJ, USA,IEEE, 14 March 2006 (2006-03-14), pages 173 - 177, XP010912400, ISBN: 978-1-4244-0153-6 *

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Publication number Publication date
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