EP2611263A3 - Circuits and methods for driving LED light sources - Google Patents

Circuits and methods for driving LED light sources Download PDF

Info

Publication number
EP2611263A3
EP2611263A3 EP12180381.1A EP12180381A EP2611263A3 EP 2611263 A3 EP2611263 A3 EP 2611263A3 EP 12180381 A EP12180381 A EP 12180381A EP 2611263 A3 EP2611263 A3 EP 2611263A3
Authority
EP
European Patent Office
Prior art keywords
power
operable
led light
switch
transformer
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Withdrawn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
EP12180381.1A
Other languages
German (de)
French (fr)
Other versions
EP2611263A2 (en
Inventor
Yan Tiesheng
Lin Feng
Li Youling
Kuo Ching-Chuan
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.)
O2Micro Inc
Original Assignee
O2Micro Inc
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 CN201110447599.XA external-priority patent/CN102548143B/en
Priority claimed from US13/369,620 external-priority patent/US9030122B2/en
Application filed by O2Micro Inc filed Critical O2Micro Inc
Publication of EP2611263A2 publication Critical patent/EP2611263A2/en
Publication of EP2611263A3 publication Critical patent/EP2611263A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology

Abstract

A driving circuit for controlling power of a light-emitting diode (LED) light source includes a transformer, a switch controller, and a dimming controller. The transformer has a primary winding operable for receiving input power from an AC/DC converter and a secondary winding operable for providing output power to the LED light source. The switch controller coupled between an optical coupler and the primary winding is operable for receiving a feedback signal indicative of a target level of a current flowing through the LED light source from the optical coupler, and for controlling input power to the primary winding according to the feedback signal. The dimming controller coupled to the secondary winding is operable for receiving a switch monitoring signal indicative of an operation of a power switch coupled between an AC power source and the AC/DC converter, and for regulating the output power of the transformer by adjusting the feedback signal according to the switch monitoring signal.
EP12180381.1A 2011-12-28 2012-08-14 Circuits and methods for driving LED light sources Withdrawn EP2611263A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110447599.XA CN102548143B (en) 2011-12-28 2011-12-28 Drive circuit, dimmer controller and method for electrically controlling light-emitting diode (LED) light source
US13/369,620 US9030122B2 (en) 2008-12-12 2012-02-09 Circuits and methods for driving LED light sources

Publications (2)

Publication Number Publication Date
EP2611263A2 EP2611263A2 (en) 2013-07-03
EP2611263A3 true EP2611263A3 (en) 2014-03-05

Family

ID=46800026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12180381.1A Withdrawn EP2611263A3 (en) 2011-12-28 2012-08-14 Circuits and methods for driving LED light sources

Country Status (4)

Country Link
EP (1) EP2611263A3 (en)
JP (1) JP2013140931A (en)
BR (1) BR102012033492A2 (en)
IN (1) IN2012DE00931A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014065389A1 (en) 2012-10-25 2014-05-01 Semiconductor Energy Laboratory Co., Ltd. Central control system
CN104902610B (en) * 2014-03-04 2017-07-21 通嘉科技股份有限公司 Dimming controlling method and related backlight controller
WO2015161379A1 (en) * 2014-04-24 2015-10-29 Tomas Rodinger Dimmable led light
EP3007521A3 (en) * 2014-10-08 2016-06-01 O2Micro, Inc. Driving circuit with dimming controller for driving light sources
SK972016A3 (en) * 2016-11-09 2018-06-01 Miroslav Labaš Method of gradually lighting and extinguishing bulbs of any kind
CN108834263B (en) * 2018-07-27 2023-09-12 深圳市明微电子股份有限公司 Voltage-adjustable dimming control circuit and system
CN109257848A (en) * 2018-10-22 2019-01-22 上海炬佑智能科技有限公司 Light source driving circuit, light source driving method and flight time distance measuring sensor
CN109661075A (en) * 2019-01-28 2019-04-19 上海电力学院 Single-stage AC-DC multi output no electrolytic capacitor high-power LED drive circuit
CN111885764B (en) * 2020-07-15 2022-05-17 宁波公牛光电科技有限公司 Power supply circuit and lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100148691A1 (en) * 2008-12-12 2010-06-17 O2Micro, Inc. Driving circuit with dimming controller for driving light sources
US7759881B1 (en) * 2008-03-31 2010-07-20 Cirrus Logic, Inc. LED lighting system with a multiple mode current control dimming strategy
US20100225249A1 (en) * 2009-03-04 2010-09-09 Richtek Technology Corporation LED Driver with Direct AC-DC Conversion and Control, and Method and Integrated Circuit Therefor
US20110109230A1 (en) * 2009-11-11 2011-05-12 Osram Sylvania Inc. Ballast Circuit for LED-Based Lamp Including Power Factor Correction with Protective Isolation
US20110227496A1 (en) * 2008-12-12 2011-09-22 O2Micro, Inc. Circuits and methods for driving light sources

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7759881B1 (en) * 2008-03-31 2010-07-20 Cirrus Logic, Inc. LED lighting system with a multiple mode current control dimming strategy
US20100148691A1 (en) * 2008-12-12 2010-06-17 O2Micro, Inc. Driving circuit with dimming controller for driving light sources
US20110227496A1 (en) * 2008-12-12 2011-09-22 O2Micro, Inc. Circuits and methods for driving light sources
US20100225249A1 (en) * 2009-03-04 2010-09-09 Richtek Technology Corporation LED Driver with Direct AC-DC Conversion and Control, and Method and Integrated Circuit Therefor
US20110109230A1 (en) * 2009-11-11 2011-05-12 Osram Sylvania Inc. Ballast Circuit for LED-Based Lamp Including Power Factor Correction with Protective Isolation

Also Published As

Publication number Publication date
JP2013140931A (en) 2013-07-18
IN2012DE00931A (en) 2015-09-04
EP2611263A2 (en) 2013-07-03
BR102012033492A2 (en) 2015-05-05

Similar Documents

Publication Publication Date Title
EP2611263A3 (en) Circuits and methods for driving LED light sources
RU2014106854A (en) SYSTEM AND METHOD OF EMBODIMENT OF DECREASING THE BRIGHTNESS CONDUCTED ON THE BASIS OF THE NETWORK SIGNAL, A SOLID SOLID LIGHTING MODULE
EP2521423A3 (en) Circuits and methods for driving light sources
JP5810305B2 (en) Lighting device and lighting apparatus
JP2017523580A5 (en)
WO2011005579A3 (en) Illumination device including leds and a switching power control system
MX2013012800A (en) Dimming for constant current led driver circuit.
EP2506682A3 (en) Light driving apparatus
GB2475634B (en) Configurable LED driver/dimmer for solid state lighting applications
JP2014524130A5 (en)
EP2498579A3 (en) Controllers, systems and methods for controlling dimming of light sources
WO2010027817A3 (en) Power factor correction in and dimming of solid state lighting devices
WO2014008062A3 (en) Systems and methods for low-power lamp compatibility with a leading-edge dimmer and a magnetic transformer
EP2547173A3 (en) Illumination light communication device, and illumination apparatus and system including same
RU2013134172A (en) METHOD AND DEVICE FOR LIMITING POSITIVE AND NEGATIVE EMISSIONS OF CURRENT IN THE LIGHT POWER SIGNAL FORMER
EP2563094A3 (en) Circuits and methods for driving light sources
NZ619848A (en) Led light controller system and method
RU2013140391A (en) DEVICE AND METHOD FOR MATCHING INPUT SIGNAL FOR CONTROL OF LIGHT POWER REGULATION WITH A DRIVER OF LIGHTING WITH REGULATION OF LIGHT POWER WITH ELECTRICAL INSULATION
EP2496058A3 (en) Illumination system
EP2947964A3 (en) Device for driving light emitting diode module and method for driving light emitting diode module
GB201300495D0 (en) Circuits and methods of driving light sources
MX340611B (en) Analog circuit for color change dimming.
KR20150001033A (en) Power supplying apparatus
US8803437B2 (en) Switching mode pulsed current supply for driving LEDS
EP2552180A3 (en) Lighting device and illumination apparatus using same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: H05B 33/08 20060101AFI20140128BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140906