WO2008124718A3 - Light emitting diode controller, methods of light emitting diode control, and components for same - Google Patents

Light emitting diode controller, methods of light emitting diode control, and components for same Download PDF

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Publication number
WO2008124718A3
WO2008124718A3 PCT/US2008/059632 US2008059632W WO2008124718A3 WO 2008124718 A3 WO2008124718 A3 WO 2008124718A3 US 2008059632 W US2008059632 W US 2008059632W WO 2008124718 A3 WO2008124718 A3 WO 2008124718A3
Authority
WO
WIPO (PCT)
Prior art keywords
pulse frequency
light emitting
emitting diode
control signal
methods
Prior art date
Application number
PCT/US2008/059632
Other languages
French (fr)
Other versions
WO2008124718A2 (en
Inventor
Tomislav J. Stimac
Original Assignee
Lumination Llc
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 Lumination Llc filed Critical Lumination Llc
Publication of WO2008124718A2 publication Critical patent/WO2008124718A2/en
Publication of WO2008124718A3 publication Critical patent/WO2008124718A3/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]
    • H05B45/20—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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Landscapes

  • Optical Communication System (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A light emitting diode controller comprises a transform processor receiving an illuminance level input and outputting a pulse frequency control signal accounting for a non-linear relationship between illuminance and pulse frequency, and a pulse frequency modulator that drives one or more light emitting diodes using pulse frequency modulation at a pulse frequency corresponding to the pulse frequency control signal. A light emitting diode control method comprises transforming an illuminance level input to a pulse frequency control signal accounting for a non-linear relationship between illuminance and pulse frequency, and driving one or more light emitting diodes using pulse frequency modulation at a pulse frequency corresponding to the pulse frequency control signal. Lookup tables for such controllers and methods are also disclosed.
PCT/US2008/059632 2007-04-10 2008-04-08 Light emitting diode controller, methods of light emitting diode control, and components for same WO2008124718A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91087707P 2007-04-10 2007-04-10
US60/910,877 2007-04-10

Publications (2)

Publication Number Publication Date
WO2008124718A2 WO2008124718A2 (en) 2008-10-16
WO2008124718A3 true WO2008124718A3 (en) 2009-12-30

Family

ID=39522173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/059632 WO2008124718A2 (en) 2007-04-10 2008-04-08 Light emitting diode controller, methods of light emitting diode control, and components for same

Country Status (1)

Country Link
WO (1) WO2008124718A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8373643B2 (en) * 2008-10-03 2013-02-12 Freescale Semiconductor, Inc. Frequency synthesis and synchronization for LED drivers
JP5253309B2 (en) 2009-07-02 2013-07-31 オリンパス株式会社 Microscope system and control method thereof
US8228098B2 (en) 2009-08-07 2012-07-24 Freescale Semiconductor, Inc. Pulse width modulation frequency conversion
US8237700B2 (en) 2009-11-25 2012-08-07 Freescale Semiconductor, Inc. Synchronized phase-shifted pulse width modulation signal generation
US9490792B2 (en) 2010-02-10 2016-11-08 Freescale Semiconductor, Inc. Pulse width modulation with effective high duty resolution
US8599915B2 (en) 2011-02-11 2013-12-03 Freescale Semiconductor, Inc. Phase-shifted pulse width modulation signal generation device and method therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356721A1 (en) * 1988-08-02 1990-03-07 Telectronics N.V. Pacemaker terminal
US5261395A (en) * 1992-03-02 1993-11-16 Cardiac Pacemaker, Inc. Tooless pulse generator to lead connection
US5275620A (en) * 1990-05-21 1994-01-04 Telectronics, N.V. Implantable lead connectors and remote lead assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356721A1 (en) * 1988-08-02 1990-03-07 Telectronics N.V. Pacemaker terminal
US5275620A (en) * 1990-05-21 1994-01-04 Telectronics, N.V. Implantable lead connectors and remote lead assembly
US5261395A (en) * 1992-03-02 1993-11-16 Cardiac Pacemaker, Inc. Tooless pulse generator to lead connection

Also Published As

Publication number Publication date
WO2008124718A2 (en) 2008-10-16

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