WO2008102479A1 - 負荷駆動回路、集積回路、ｄｃ－ｄｃコンバータ、および負荷駆動方法 - Google Patents

負荷駆動回路、集積回路、ｄｃ－ｄｃコンバータ、および負荷駆動方法 Download PDF

Info

Publication number
WO2008102479A1
WO2008102479A1 PCT/JP2007/070733 JP2007070733W WO2008102479A1 WO 2008102479 A1 WO2008102479 A1 WO 2008102479A1 JP 2007070733 W JP2007070733 W JP 2007070733W WO 2008102479 A1 WO2008102479 A1 WO 2008102479A1
Authority
WO
WIPO (PCT)
Prior art keywords
load driving
light emitting
load
circuit
emitting diode
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.)
Ceased
Application number
PCT/JP2007/070733
Other languages
English (en)
French (fr)
Inventor
Chihiro Watanabe
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to CN2007800503403A priority Critical patent/CN101589539B/zh
Priority to US12/448,773 priority patent/US8134253B2/en
Publication of WO2008102479A1 publication Critical patent/WO2008102479A1/ja
Anticipated expiration legal-status Critical
Ceased 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]
    • H05B45/40—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
    • H05B45/32—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
    • H05B45/37—Converter circuits

Landscapes

  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Dc-Dc Converters (AREA)

Abstract

　本発明の負荷制御回路は、複数の発光ダイオード（４）を直列に接続して構成されると共に互いに並列に接続されたそれぞれの発光ダイオードライン（３－１、…、３－Ｎ）に流れる電流のオン・オフを、ＰＷＭ制御する負荷制御回路（２０）であって、いずれかの発光ダイオードライン（３－１、…、３－Ｎ）に流れる電流のオン・オフのタイミングと、少なくとも一つの他の発光ダイオードライン（３－１、…、３－Ｎ）に流れる電流のオン・オフのタイミングと、を互いにずらしている。これにより、負荷を制御する時に用いるＰＷＭ制御信号の周波数選定の自由度を下げず、周辺回路の追従を妨げず、かつ、音鳴りを防止する負荷駆動回路を提供する。
PCT/JP2007/070733 2007-02-21 2007-10-24 負荷駆動回路、集積回路、ｄｃ－ｄｃコンバータ、および負荷駆動方法 Ceased WO2008102479A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2007800503403A CN101589539B (zh) 2007-02-21 2007-10-24 负载驱动电路、集成电路、直流-直流变换器、及负载驱动方法
US12/448,773 US8134253B2 (en) 2007-02-21 2007-10-24 Load driving circuit, integrated circuit, DC-DC converter, and load driving method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007041319 2007-02-21
JP2007-041319 2007-02-21

Publications (1)

Publication Number Publication Date
WO2008102479A1 true WO2008102479A1 (ja) 2008-08-28

Family

ID=39709762

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/070733 Ceased WO2008102479A1 (ja) 2007-02-21 2007-10-24 負荷駆動回路、集積回路、ｄｃ－ｄｃコンバータ、および負荷駆動方法

Country Status (3)

Country Link
US (1) US8134253B2 (ja)
CN (1) CN101589539B (ja)
WO (1) WO2008102479A1 (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009159265A (ja) * 2007-12-26 2009-07-16 Sharp Corp パルス信号遅延回路及びｌｅｄ駆動回路
ITBS20080235A1 (it) * 2008-12-22 2010-06-23 St Microelectronics Srl Circuito elettronico di alimentazione
CN101932172A (zh) * 2009-06-22 2010-12-29 理察·蓝德立·葛瑞 功率改善方法及其照明装置
JP2011192399A (ja) * 2010-03-11 2011-09-29 Panasonic Electric Works Co Ltd Ｌｅｄ点灯回路
JP2011249145A (ja) * 2010-05-27 2011-12-08 New Japan Radio Co Ltd Ｌｅｄ駆動回路
US20120098869A1 (en) * 2010-10-22 2012-04-26 Himax Analogic, Inc. Light Emitting Diode Circuit, Light Emitting Diode Driving Circuit, and Method for Driving Light Emitting Diode Channels
CN103280189A (zh) * 2013-05-17 2013-09-04 深圳市华星光电技术有限公司 一种led调光电路
JP2014209171A (ja) * 2013-03-26 2014-11-06 株式会社ジャパンディスプレイ 表示装置及び電子機器
JP2016514940A (ja) * 2013-03-28 2016-05-23 日本テキサス・インスツルメンツ株式会社 電圧レギュレータ
JP2020198243A (ja) * 2019-06-04 2020-12-10 ローム株式会社 Ｌｅｄ駆動装置及び表示装置、並びにｌｅｄ駆動装置の制御装置

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7843146B2 (en) * 2008-01-28 2010-11-30 Global Mixed-Mode Technology Inc. LED dimming control circuit
JP5301923B2 (ja) * 2008-08-20 2013-09-25 ローム株式会社 負荷駆動装置、照明装置、表示装置
US8471486B2 (en) * 2010-04-21 2013-06-25 Taiwan Semiconductor Manufacturing Company, Ltd. Energy-saving mechanisms in multi-color display devices
KR101189253B1 (ko) * 2010-11-10 2012-10-09 매그나칩 반도체 유한회사 고정위상 모드를 갖는 디지털 ｐｗｍ방식에서 디밍 신호를 이용한 ｄｃ－ｄｃ 컨버터용 ｐｗｍ 신호 생성회로 및 이를 이용한 ｌｅｄ 구동회로
TWI424782B (zh) * 2010-11-12 2014-01-21 Au Optronics Corp 光源系統與發光二極體驅動方法
KR20120084555A (ko) * 2011-01-20 2012-07-30 삼성전자주식회사 다채널 펄스 폭 변조(ｐｗｍ) 신호 생성 장치 및 방법, 이를 구비하는 ｌｅｄ 시스템
CN103340017B (zh) 2011-01-28 2015-04-22 首尔半导体株式会社 Led驱动电路封装
TWI434275B (zh) * 2011-09-13 2014-04-11 Au Optronics Corp 顯示器及直流/直流轉換器控制方法
CN103249212A (zh) * 2012-05-10 2013-08-14 湖北云川光电科技有限公司 多模组led路灯智能恒流系统
US10240456B2 (en) * 2013-03-15 2019-03-26 Merlin Technology, Inc. Inground device with advanced transmit power control and associated methods
US9425619B2 (en) 2013-03-15 2016-08-23 Merlin Technology, Inc. Advanced inground device power control and associated methods
EP2814300B1 (en) * 2013-06-10 2021-12-01 Helvar Oy Ab A driver for a light source
CN104008733A (zh) * 2014-06-17 2014-08-27 深圳市华星光电技术有限公司 升压电路、led背光驱动电路以及液晶显示器
WO2015193071A1 (en) * 2014-06-17 2015-12-23 Koninklijke Philips N.V. Led lamp device having two or more light strings
US9872346B2 (en) * 2015-05-15 2018-01-16 Cypress Semiconductor Corporation Phase controller apparatus and methods
CN104930387A (zh) * 2015-06-11 2015-09-23 合肥鑫晟光电科技有限公司 Led灯条结构及其控制方法、背光模组、液晶显示装置
CN104934012B (zh) * 2015-07-20 2018-01-09 深圳市华星光电技术有限公司 一种多时序生成电路及液晶显示器
CN107567145A (zh) * 2017-09-26 2018-01-09 宗仁科技(平潭)有限公司 Led闪灯控制电路、芯片及led灯具
DE102019105953A1 (de) * 2019-03-08 2020-09-10 HELLA GmbH & Co. KGaA Steuer- und/oder Regelungsmittel, Schaltungsanordnung und Verfahren zur Ansteuerung von Leuchtdioden in einem Leuchtdiodenfeld
US11032886B2 (en) * 2019-07-31 2021-06-08 Novatek Microelectronics Corp. Light emitting diode driver and driving method thereof
US11994023B2 (en) 2021-06-22 2024-05-28 Merlin Technology, Inc. Sonde with advanced battery power conservation and associated methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000201474A (ja) * 1998-09-11 2000-07-18 Linear Technol Corp スイッチングレギュレ―タにおけるタイミングおよびスロ―プ補償を制御するための回路および方法
JP2001297399A (ja) * 2000-04-14 2001-10-26 Yazaki Corp 信号灯制御装置及び方法
JP2005173487A (ja) * 2003-12-15 2005-06-30 Olympus Corp 蛍光顕微鏡およびコンピュータプログラム
JP2006039169A (ja) * 2004-07-27 2006-02-09 Tatsuo Nakano 発光ダイオード表示装置
JP2006050894A (ja) * 2004-08-06 2006-02-16 Stmicroelectronics Sa Ｄｃ／ｄｃコンバータによる複数負荷の給電
JP2006318773A (ja) * 2005-05-13 2006-11-24 Matsushita Electric Works Ltd Ｌｅｄ照明システムおよび照明器具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6882329B2 (en) 2001-09-28 2005-04-19 Canon Kabushiki Kaisha Drive signal generator and image display apparatus
US20040001040A1 (en) 2002-06-28 2004-01-01 Kardach James P. Methods and apparatus for providing light to a display
JP4525287B2 (ja) 2004-10-14 2010-08-18 ソニー株式会社 発光素子駆動装置および表示装置
CN1909754B (zh) * 2005-08-05 2011-05-18 硕颉科技股份有限公司 光源装置与其可调光的发光二极管控制电路
US7183957B1 (en) * 2005-12-30 2007-02-27 Cirrus Logic, Inc. Signal processing system with analog-to-digital converter using delta-sigma modulation having an internal stabilizer loop

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000201474A (ja) * 1998-09-11 2000-07-18 Linear Technol Corp スイッチングレギュレ―タにおけるタイミングおよびスロ―プ補償を制御するための回路および方法
JP2001297399A (ja) * 2000-04-14 2001-10-26 Yazaki Corp 信号灯制御装置及び方法
JP2005173487A (ja) * 2003-12-15 2005-06-30 Olympus Corp 蛍光顕微鏡およびコンピュータプログラム
JP2006039169A (ja) * 2004-07-27 2006-02-09 Tatsuo Nakano 発光ダイオード表示装置
JP2006050894A (ja) * 2004-08-06 2006-02-16 Stmicroelectronics Sa Ｄｃ／ｄｃコンバータによる複数負荷の給電
JP2006318773A (ja) * 2005-05-13 2006-11-24 Matsushita Electric Works Ltd Ｌｅｄ照明システムおよび照明器具

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009159265A (ja) * 2007-12-26 2009-07-16 Sharp Corp パルス信号遅延回路及びｌｅｄ駆動回路
US8427008B2 (en) 2008-12-22 2013-04-23 Stmicroelectronics S.R.L. Electronic power supply circuit
ITBS20080235A1 (it) * 2008-12-22 2010-06-23 St Microelectronics Srl Circuito elettronico di alimentazione
CN101932172A (zh) * 2009-06-22 2010-12-29 理察·蓝德立·葛瑞 功率改善方法及其照明装置
JP2011019389A (ja) * 2009-06-22 2011-01-27 Richard Landry Gray パワー改善方法及びその照明装置
JP2011192399A (ja) * 2010-03-11 2011-09-29 Panasonic Electric Works Co Ltd Ｌｅｄ点灯回路
JP2011249145A (ja) * 2010-05-27 2011-12-08 New Japan Radio Co Ltd Ｌｅｄ駆動回路
US20120098869A1 (en) * 2010-10-22 2012-04-26 Himax Analogic, Inc. Light Emitting Diode Circuit, Light Emitting Diode Driving Circuit, and Method for Driving Light Emitting Diode Channels
JP2014209171A (ja) * 2013-03-26 2014-11-06 株式会社ジャパンディスプレイ 表示装置及び電子機器
JP2016514940A (ja) * 2013-03-28 2016-05-23 日本テキサス・インスツルメンツ株式会社 電圧レギュレータ
US11557967B2 (en) 2013-03-28 2023-01-17 Texas Instruments Incorporated Voltage regulator with adaptive feed-forward compensation for periodic loads
CN103280189A (zh) * 2013-05-17 2013-09-04 深圳市华星光电技术有限公司 一种led调光电路
US9743499B2 (en) 2013-05-17 2017-08-22 Shenzhen China Star Optoelectronics Technology Co., Ltd Dimming circuit for LED
JP2020198243A (ja) * 2019-06-04 2020-12-10 ローム株式会社 Ｌｅｄ駆動装置及び表示装置、並びにｌｅｄ駆動装置の制御装置
JP7258662B2 (ja) 2019-06-04 2023-04-17 ローム株式会社 Ｌｅｄ駆動装置及び表示装置、並びにｌｅｄ駆動装置の制御装置

Also Published As

Publication number Publication date
US20100090530A1 (en) 2010-04-15
CN101589539B (zh) 2012-10-17
US8134253B2 (en) 2012-03-13
CN101589539A (zh) 2009-11-25

Similar Documents

Publication Publication Date Title
WO2008102479A1 (ja) 負荷駆動回路、集積回路、ｄｃ－ｄｃコンバータ、および負荷駆動方法
US8427081B2 (en) Driving apparatus of light emitting diode and driving method thereof
US8217587B2 (en) LED driver circuit
US8076872B2 (en) Light emitting diode circuit and arrangement and device
CN104837237B (zh) 车辆用灯具及其驱动装置、控制方法
WO2005094300A3 (en) System and method for driving a plurality of loads
WO2008086050A3 (en) Electronic circuit for driving a diode load
US20080100234A1 (en) Light source driving circuit and driving method thereof
WO2005089302A3 (en) Constant current class 3 lighting system
EP2147574A1 (en) Driver device for leds
US9210748B2 (en) Systems and methods of driving multiple outputs
JP2011034547A (ja) 定電流装置およびそれを用いたｌｅｄ装置
KR20170102434A (ko) 복수의 출력을 포함하는 차량의 발광 디바이스용 전력 공급 장치
US10143055B2 (en) Illuminating device for vehicles
US9485815B2 (en) Backlight driving circuit and liquid crystal display with the same
EP2574150A1 (en) Power supply device and luminaire
JP6504448B2 (ja) 変調装置および照明器具
JP7189598B2 (ja) 照明装置
US20120235596A1 (en) Led drivers with audible noise elimination and associated methods
JP2013062032A (ja) 照明装置
JP2014505964A (ja) 直列／並列の固体照明デバイス用のランプ制御されたドライバ
JP6785955B2 (ja) 電力バックアップ装置を含む照明システム
KR101503977B1 (ko) 발광 다이오드 조명 구동 장치 및 방법
US8487550B2 (en) Multi-channel LED driver circuit
KR20130008103A (ko) 공용 인덕터를 이용한 다중 구조의 부스트 회로

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780050340.3

Country of ref document: CN

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

Ref document number: 07830467

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 12448773

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07830467

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP