WO2009114279A3 - Led driver with dynamic power management - Google Patents

Led driver with dynamic power management Download PDF

Info

Publication number
WO2009114279A3
WO2009114279A3 PCT/US2009/035284 US2009035284W WO2009114279A3 WO 2009114279 A3 WO2009114279 A3 WO 2009114279A3 US 2009035284 W US2009035284 W US 2009035284W WO 2009114279 A3 WO2009114279 A3 WO 2009114279A3
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
led
tail
output voltage
led driver
Prior art date
Application number
PCT/US2009/035284
Other languages
French (fr)
Other versions
WO2009114279A2 (en
Inventor
Bin Zhao
Jack W. Cornish
Brian B. Horng
Victor K. Lee
Andrew M. Kameya
Original Assignee
Freescale Semiconductor 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
Application filed by Freescale Semiconductor Inc. filed Critical Freescale Semiconductor Inc.
Priority to JP2010550741A priority Critical patent/JP2011515027A/en
Publication of WO2009114279A2 publication Critical patent/WO2009114279A2/en
Publication of WO2009114279A3 publication Critical patent/WO2009114279A3/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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • 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]

Abstract

Power management in a light emitting diode (LED) system (100) having a plurality of LED strings (102) is disclosed. A voltage source provides an output voltage to drive the LED strings (102). An LED driver (114) monitors the tail voltages of the active LED strings to identify the minimum, or lowest, tail voltage and adjusts the output voltage of the voltage source based on the lowest tail voltage. The LED driver (114) can adjust the output voltage so as to maintain the lowest tail voltage at or near a predetermined threshold voltage so as to ensure that the output voltage is sufficient to properly drive each active LED string with a regulated current in view of pulse width modulation (PWM) performance requirements without excessive power consumption.
PCT/US2009/035284 2008-03-12 2009-02-26 Led driver with dynamic power management WO2009114279A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010550741A JP2011515027A (en) 2008-03-12 2009-02-26 LED driver with dynamic power management

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3605308P 2008-03-12 2008-03-12
US61/036,053 2008-03-12
US12/056,237 US7825610B2 (en) 2008-03-12 2008-03-26 LED driver with dynamic power management
US12/056,237 2008-03-26

Publications (2)

Publication Number Publication Date
WO2009114279A2 WO2009114279A2 (en) 2009-09-17
WO2009114279A3 true WO2009114279A3 (en) 2009-12-17

Family

ID=41062297

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/035284 WO2009114279A2 (en) 2008-03-12 2009-02-26 Led driver with dynamic power management

Country Status (3)

Country Link
US (1) US7825610B2 (en)
JP (1) JP2011515027A (en)
WO (1) WO2009114279A2 (en)

Families Citing this family (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2068599B1 (en) * 2007-12-03 2011-04-27 Sirio Panel S.P.A. Circuit arrangement for generating a pulse width modulated signal for driving electrical loads
US8115414B2 (en) * 2008-03-12 2012-02-14 Freescale Semiconductor, Inc. LED driver with segmented dynamic headroom control
US8106604B2 (en) * 2008-03-12 2012-01-31 Freescale Semiconductor, Inc. LED driver with dynamic power management
US8634941B2 (en) 2008-04-01 2014-01-21 Infineon Technologies Austria Ag System and method for multi-channel control system
TWI391028B (en) * 2008-04-18 2013-03-21 Novatek Microelectronics Corp Light emitting diode module
WO2009129581A1 (en) * 2008-04-24 2009-10-29 Indice Pty Ltd Power control
US8035314B2 (en) * 2008-06-23 2011-10-11 Freescale Semiconductor, Inc. Method and device for LED channel managment in LED driver
KR101289639B1 (en) * 2008-07-04 2013-07-30 엘지디스플레이 주식회사 Apparatus and Method for Driving Light Source in Back Light Unit
US8547321B2 (en) * 2008-07-23 2013-10-01 Apple Inc. LED backlight driver synchronization and power reduction
US8279144B2 (en) * 2008-07-31 2012-10-02 Freescale Semiconductor, Inc. LED driver with frame-based dynamic power management
JP5256943B2 (en) * 2008-09-01 2013-08-07 サンケン電気株式会社 LED lighting device
US8957601B2 (en) 2008-09-18 2015-02-17 Lumastream Canada Ulc Configurable LED driver/dimmer for solid state lighting applications
US8373643B2 (en) * 2008-10-03 2013-02-12 Freescale Semiconductor, Inc. Frequency synthesis and synchronization for LED drivers
US8004207B2 (en) * 2008-12-03 2011-08-23 Freescale Semiconductor, Inc. LED driver with precharge and track/hold
US8035315B2 (en) * 2008-12-22 2011-10-11 Freescale Semiconductor, Inc. LED driver with feedback calibration
US8049439B2 (en) * 2009-01-30 2011-11-01 Freescale Semiconductor, Inc. LED driver with dynamic headroom control
US8493003B2 (en) * 2009-02-09 2013-07-23 Freescale Semiconductor, Inc. Serial cascade of minimium tail voltages of subsets of LED strings for dynamic power control in LED displays
US8179051B2 (en) * 2009-02-09 2012-05-15 Freescale Semiconductor, Inc. Serial configuration for dynamic power control in LED displays
CN101848574A (en) * 2009-03-27 2010-09-29 北京京东方光电科技有限公司 Drive device of light emitting diode backlight source and brightness adjustment method
US8040079B2 (en) * 2009-04-15 2011-10-18 Freescale Semiconductor, Inc. Peak detection with digital conversion
US8427069B2 (en) * 2009-06-22 2013-04-23 Polar Semiconductor, Inc. Current-regulated power supply with soft-start protection
US8081199B2 (en) * 2009-06-26 2011-12-20 Panasonic Corporation Light emitting element drive apparatus, planar illumination apparatus, and liquid crystal display apparatus
KR100941509B1 (en) * 2009-06-30 2010-02-10 주식회사 실리콘마이터스 Reference voltage generation device, control device comprising the reference voltage generation device and led light emitting device using the control device
KR101708371B1 (en) * 2009-07-16 2017-03-09 삼성디스플레이 주식회사 Backlight unit and display apparatus having the same
US8305007B2 (en) * 2009-07-17 2012-11-06 Freescale Semiconductor, Inc. Analog-to-digital converter with non-uniform accuracy
US8228098B2 (en) * 2009-08-07 2012-07-24 Freescale Semiconductor, Inc. Pulse width modulation frequency conversion
US7843242B1 (en) 2009-08-07 2010-11-30 Freescale Semiconductor, Inc. Phase-shifted pulse width modulation signal generation
US8334662B2 (en) * 2009-09-11 2012-12-18 Iwatt Inc. Adaptive switch mode LED driver
US8378586B2 (en) * 2009-10-01 2013-02-19 Microsemi Corporation Distributed architecture voltage controlled backlight driver
US8466628B2 (en) * 2009-10-07 2013-06-18 Lutron Electronics Co., Inc. Closed-loop load control circuit having a wide output range
TW201115314A (en) * 2009-10-30 2011-05-01 De-Zheng Chen Intelligent DC power supply circuit
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
US8169245B2 (en) * 2010-02-10 2012-05-01 Freescale Semiconductor, Inc. Duty transition control in pulse width modulation signaling
DE102010031239A1 (en) 2010-03-19 2011-09-22 Tridonic Ag LED control with clocked constant current source
TWI402805B (en) * 2010-04-20 2013-07-21 Chunghwa Picture Tubes Ltd Voltage converter and driving method for use in a backlight module
CN201718080U (en) * 2010-04-22 2011-01-19 国琏电子（上海）有限公司 LED backlight source driving system
KR101121956B1 (en) * 2010-04-29 2012-03-09 주식회사 실리콘웍스 Driver IC for electrical road and driving method thereof
JP5595126B2 (en) * 2010-06-03 2014-09-24 ローム株式会社 LED driving device and electronic apparatus equipped with the same
WO2011156691A1 (en) * 2010-06-10 2011-12-15 Maxim Integrated Products, Inc. Current sensing for led drivers
CN102281665B (en) * 2010-06-11 2014-07-02 瑞鼎科技股份有限公司 Control circuit, light-emitting diode driver using control circuit and control method
US9491822B2 (en) * 2010-10-01 2016-11-08 Intersil Americas LLC LED driver with adaptive dynamic headroom voltage control
TWI429320B (en) * 2010-10-27 2014-03-01 Mstar Semiconductor Inc Feedback regulating circuit
JP5592769B2 (en) * 2010-12-07 2014-09-17 株式会社アイテックシステム Lighting device
US8599915B2 (en) 2011-02-11 2013-12-03 Freescale Semiconductor, Inc. Phase-shifted pulse width modulation signal generation device and method therefor
US8680787B2 (en) 2011-03-15 2014-03-25 Lutron Electronics Co., Inc. Load control device for a light-emitting diode light source
EP2512207B1 (en) * 2011-04-15 2013-06-05 ATLAS Elektronik GmbH Driver circuit and method for powering an LED and illuminant
US8669715B2 (en) 2011-04-22 2014-03-11 Crs Electronics LED driver having constant input current
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
TWI437908B (en) * 2011-05-17 2014-05-11 Leadtrend Tech Corp Driving circuit having current balancing functionality
US9468055B2 (en) * 2011-10-24 2016-10-11 Alpha And Omega Semiconductor Incorporated LED current control
JP5962017B2 (en) * 2012-01-11 2016-08-03 サンケン電気株式会社 Light emitting element driving device
KR101397778B1 (en) * 2012-03-21 2014-05-20 삼성전기주식회사 Light emitting driving apparatus
KR101397786B1 (en) * 2012-03-21 2014-05-20 삼성전기주식회사 Light emitting diode driving apparatus
US9144126B2 (en) * 2012-08-22 2015-09-22 Allegro Microsystems, Llc LED driver having priority queue to track dominant LED channel
GB2511092A (en) * 2013-02-22 2014-08-27 Multiload Technology Ltd Power supply apparatus
EP3132326B1 (en) * 2013-10-08 2019-12-25 Texas Instruments Incorporated Serial bus voltage compensation
KR20150116303A (en) * 2014-04-07 2015-10-15 엘지전자 주식회사 Image display apparatus, server and method for operating the same
CN104267249A (en) * 2014-10-09 2015-01-07 长智光电（四川）有限公司 Device for measuring voltage difference between LED string lights
CN106297618A (en) * 2015-06-08 2017-01-04 无锡晶哲科技有限公司 A kind of algorithm reducing seven segment digital tubes operating power consumption
JP6635689B2 (en) * 2015-06-23 2020-01-29 ローム株式会社 Illumination device, control circuit thereof, control method, and display device using the same
ITUB20159821A1 (en) * 2015-12-31 2017-07-01 St Microelectronics Srl ELECTRONIC CIRCUIT TO DRIVE LED STRINGS INCLUDING A PLURALITY OF ADJUSTMENT MODULES THAT OPERATE IN SEQUENCE
US9867245B2 (en) 2015-12-31 2018-01-09 Stmicroelectronics S.R.L. Electronic circuit for driving LED strings so as to reduce the light flicker
US9867242B1 (en) * 2016-12-12 2018-01-09 Datalogic Usa, Inc. System and method of operating a constant current light-emitting diode pulsing drive circuit
JP7189804B2 (en) * 2019-02-26 2022-12-14 ローム株式会社 Light-emitting element driving device, light-emitting element driving system, and light-emitting system
CN110351922B (en) * 2019-05-30 2021-06-11 鹰潭阳光照明有限公司 Intelligent dimmable LED lamp
WO2021241451A1 (en) * 2020-05-29 2021-12-02 株式会社小糸製作所 Vehicle lighting system
TWI746153B (en) * 2020-06-18 2021-11-11 聯詠科技股份有限公司 Led driver and precharging method thereof
CN112927662B (en) * 2021-03-09 2022-08-05 重庆惠科金渝光电科技有限公司 Driving method and driving circuit of display panel
US11750205B1 (en) * 2022-04-11 2023-09-05 Nxp B.V. Current digital-to-analog converter with distributed reconstruction filtering

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003332624A (en) * 2002-05-07 2003-11-21 Rohm Co Ltd Light emitting element drive device and electronic apparatus having light emitting element
US20040233144A1 (en) * 2003-05-09 2004-11-25 Rader William E. Method and apparatus for driving leds
JP2005116199A (en) * 2003-10-03 2005-04-28 Arueido Kk Led lighting control device, and led lighting control method
US20080054815A1 (en) * 2006-09-01 2008-03-06 Broadcom Corporation Single inductor serial-parallel LED driver

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162444A (en) 1977-07-08 1979-07-24 Tuscan Corporation Peak level detector
JPS60158780A (en) 1984-01-27 1985-08-20 Sony Corp Display
US4615029A (en) 1984-12-03 1986-09-30 Texas Instruments Incorporated Ring transmission network for interfacing control functions between master and slave devices
US4686640A (en) 1984-12-12 1987-08-11 Honeywell Inc. Programmable digital hysteresis circuit
JP2856744B2 (en) 1988-12-02 1999-02-10 株式会社東芝 Peak detection circuit
JPH0754335B2 (en) 1989-01-31 1995-06-07 富士通株式会社 Peak value detection circuit
US5508909A (en) 1994-04-26 1996-04-16 Patriot Sensors And Controls Method and systems for use with an industrial controller
US5723950A (en) 1996-06-10 1998-03-03 Motorola Pre-charge driver for light emitting devices and method
US6281822B1 (en) 1999-05-28 2001-08-28 Dot Wireless, Inc. Pulse density modulator with improved pulse distribution
JP2001215913A (en) * 2000-02-04 2001-08-10 Toko Inc Lighting circuit
AU2002340265A1 (en) 2001-10-19 2003-04-28 Clare Micronix Integrated Systems Inc. Matrix element precharge voltage adjusting apparatus and method
US6864641B2 (en) * 2003-02-20 2005-03-08 Visteon Global Technologies, Inc. Method and apparatus for controlling light emitting diodes
EP1658757A4 (en) 2003-08-27 2007-12-26 Osram Sylvania Inc Driver circuit for led vehicle lamp
TWI264179B (en) 2004-02-17 2006-10-11 Sunplus Technology Co Ltd Circuit and method for pulse width modulation
JP4606190B2 (en) * 2004-03-30 2011-01-05 ローム株式会社 VOLTAGE CONTROL DEVICE, VOLTAGE CONTROL METHOD, AND ELECTRONIC DEVICE USING THE SAME
JP4621212B2 (en) 2005-01-07 2011-01-26 富士通株式会社 Data transmission device
WO2006086652A2 (en) 2005-02-07 2006-08-17 California Micro Devices Automatic voltage selection for series driven leds
US7262724B2 (en) 2005-03-31 2007-08-28 Freescale Semiconductor, Inc. System and method for adjusting dynamic range of analog-to-digital converter
JP4704103B2 (en) * 2005-05-16 2011-06-15 ローム株式会社 Constant current driving circuit, electronic device using the same, and light emitting diode driving method
US7847783B2 (en) * 2005-10-11 2010-12-07 O2Micro International Limited Controller circuitry for light emitting diodes
JP2007220855A (en) * 2006-02-16 2007-08-30 Matsushita Electric Ind Co Ltd Led lighting circuit
WO2008144961A1 (en) * 2007-05-31 2008-12-04 Texas Instruments Incorporated Regulation for led strings
US7511545B1 (en) 2007-09-13 2009-03-31 Delphi Technologies, Inc. Analog duty cycle replicating frequency converter for PWM signals
JP5525451B2 (en) * 2007-11-16 2014-06-18 アレグロ・マイクロシステムズ・エルエルシー Electronic circuit for driving a plurality of series connected light emitting diode arrays
US20090187925A1 (en) * 2008-01-17 2009-07-23 Delta Electronic Inc. Driver that efficiently regulates current in a plurality of LED strings
US8106604B2 (en) 2008-03-12 2012-01-31 Freescale Semiconductor, Inc. LED driver with dynamic power management
US8115414B2 (en) 2008-03-12 2012-02-14 Freescale Semiconductor, Inc. LED driver with segmented dynamic headroom control
US8035314B2 (en) 2008-06-23 2011-10-11 Freescale Semiconductor, Inc. Method and device for LED channel managment in LED driver
US8279144B2 (en) 2008-07-31 2012-10-02 Freescale Semiconductor, Inc. LED driver with frame-based dynamic power management
US8373643B2 (en) 2008-10-03 2013-02-12 Freescale Semiconductor, Inc. Frequency synthesis and synchronization for LED drivers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003332624A (en) * 2002-05-07 2003-11-21 Rohm Co Ltd Light emitting element drive device and electronic apparatus having light emitting element
US20040233144A1 (en) * 2003-05-09 2004-11-25 Rader William E. Method and apparatus for driving leds
JP2005116199A (en) * 2003-10-03 2005-04-28 Arueido Kk Led lighting control device, and led lighting control method
US20080054815A1 (en) * 2006-09-01 2008-03-06 Broadcom Corporation Single inductor serial-parallel LED driver

Also Published As

Publication number Publication date
JP2011515027A (en) 2011-05-12
US7825610B2 (en) 2010-11-02
WO2009114279A2 (en) 2009-09-17
US20090230891A1 (en) 2009-09-17

Similar Documents

Publication Publication Date Title
WO2009114279A3 (en) Led driver with dynamic power management
WO2010074879A3 (en) Led driver with feedback calibration
EP1986470A3 (en) Apparatus amd method to provide a hybrid linear/switching current source, such as for high-efficiency, wide dimming range light emitting diode (LED) backlighting
DE60306624D1 (en) CIRCUIT TO CONTROL A LIGHTING DIODE FIELD
WO2010148113A3 (en) Continuous step driver
WO2008086050A3 (en) Electronic circuit for driving a diode load
WO2008084771A1 (en) Light emitting device and method for driving light emitting device
TW200802234A (en) Liquid crystal display driving system having light emitting diodes
WO2011097175A3 (en) Integrated electronic device for controlling light emitting diodes
WO2005015957A3 (en) Power supply for led airfield lighting
WO2008154069A3 (en) High efficiency power controller for solid state lighting
TW200644728A (en) Circuit and method for serial powering of a LED string
WO2012076953A3 (en) Mains dimmable led driver circuits
WO2013186655A3 (en) Self-adjusting lighting driver for driving lighting sources and lighting unit including self-adjusting lighting driver
CA2311435A1 (en) Capacitor regulated high efficiency driver for light emitting diode
JP6029121B2 (en) LED drive circuit
KR20140018835A (en) Solid state lighting driver with thdi bypass circuit
WO2009062015A3 (en) Led light output linearization
WO2009028058A1 (en) Light emitting control device and the like
CN202268152U (en) Backlight constant-current and constant-voltage driving circuit for display screen
CN102740540A (en) Light emitting diode driving system
US8253341B2 (en) Light emitting diode lamp and control circuit thereof
KR101160154B1 (en) Unidirectional lighting emitting diode module device with reduction to harmonics distortion
TWI445444B (en) Led driving circuit
CN202425163U (en) Input voltage adaptive circuit for LED (Light Emitting Diode) light source

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09719804

Country of ref document: EP

Kind code of ref document: A2

WWE Wipo information: entry into national phase

Ref document number: 2010550741

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09719804

Country of ref document: EP

Kind code of ref document: A2