WO2010041044A3 - Method of operating an led - Google Patents

Method of operating an led Download PDF

Info

Publication number
WO2010041044A3
WO2010041044A3 PCT/GB2009/002443 GB2009002443W WO2010041044A3 WO 2010041044 A3 WO2010041044 A3 WO 2010041044A3 GB 2009002443 W GB2009002443 W GB 2009002443W WO 2010041044 A3 WO2010041044 A3 WO 2010041044A3
Authority
WO
WIPO (PCT)
Prior art keywords
led
point
operating
control system
resistance range
Prior art date
Application number
PCT/GB2009/002443
Other languages
French (fr)
Other versions
WO2010041044A2 (en
Inventor
Sridharan Manickam
Original Assignee
Carbon Innovation Technology Limited
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
Priority claimed from GB0906223A external-priority patent/GB0906223D0/en
Application filed by Carbon Innovation Technology Limited filed Critical Carbon Innovation Technology Limited
Publication of WO2010041044A2 publication Critical patent/WO2010041044A2/en
Publication of WO2010041044A3 publication Critical patent/WO2010041044A3/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]
    • H05B45/20—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]
    • H05B45/10—Controlling the intensity 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
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/28—Circuit arrangements for protecting against abnormal temperature
    • 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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • 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
    • H05B45/345—Current stabilisation; Maintaining constant current
    • 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

Abstract

There is described a method of operating a high power high intensity LED at a point at which it consumes optimum power and delivers highest lumens which comprises operating the LED at the point on the voltage / current characteristic curve past the point at which the LED changes from linear resistance range to negative resistance range. There is also described a circuit and control system for use in the method and a luminary assembly comprising at least one array of high power high intensity LEDs operated with the control system.
PCT/GB2009/002443 2008-10-10 2009-10-10 Method of operating an led WO2010041044A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IN2470/CHE/2008 2008-10-10
IN2470CH2008 2008-10-10
GB0906223A GB0906223D0 (en) 2009-04-13 2009-04-13 Intelligent led street light
GB0906223.3 2009-04-13

Publications (2)

Publication Number Publication Date
WO2010041044A2 WO2010041044A2 (en) 2010-04-15
WO2010041044A3 true WO2010041044A3 (en) 2010-06-03

Family

ID=41566272

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/002443 WO2010041044A2 (en) 2008-10-10 2009-10-10 Method of operating an led

Country Status (1)

Country Link
WO (1) WO2010041044A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040105264A1 (en) * 2002-07-12 2004-06-03 Yechezkal Spero Multiple Light-Source Illuminating System
WO2006017930A1 (en) * 2004-08-18 2006-02-23 Remco Solid State Lighting Inc. Led control utilizing dynamic resistance of leds
US20070091634A1 (en) * 2005-10-24 2007-04-26 Sumitomo Electric Industries, Ltd. Light supply unit, illumination unit, and illumination system
US20080224849A1 (en) * 2007-03-15 2008-09-18 Geno Sirhan Multifunctional lighting system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040105264A1 (en) * 2002-07-12 2004-06-03 Yechezkal Spero Multiple Light-Source Illuminating System
WO2006017930A1 (en) * 2004-08-18 2006-02-23 Remco Solid State Lighting Inc. Led control utilizing dynamic resistance of leds
US20070091634A1 (en) * 2005-10-24 2007-04-26 Sumitomo Electric Industries, Ltd. Light supply unit, illumination unit, and illumination system
US20080224849A1 (en) * 2007-03-15 2008-09-18 Geno Sirhan Multifunctional lighting system

Also Published As

Publication number Publication date
WO2010041044A2 (en) 2010-04-15

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