JP4944658B2 - 発光ダイオード用駆動回路 - Google Patents

発光ダイオード用駆動回路 Download PDF

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Publication number
JP4944658B2
JP4944658B2 JP2007096592A JP2007096592A JP4944658B2 JP 4944658 B2 JP4944658 B2 JP 4944658B2 JP 2007096592 A JP2007096592 A JP 2007096592A JP 2007096592 A JP2007096592 A JP 2007096592A JP 4944658 B2 JP4944658 B2 JP 4944658B2
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JP
Japan
Prior art keywords
led
voltage
string
circuit
power converter
Prior art date
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Active
Application number
JP2007096592A
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English (en)
Japanese (ja)
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JP2008166674A (ja
Inventor
林益勝
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.)
Macroblock Inc
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Macroblock Inc
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Publication date
Application filed by Macroblock Inc filed Critical Macroblock Inc
Publication of JP2008166674A publication Critical patent/JP2008166674A/ja
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Publication of JP4944658B2 publication Critical patent/JP4944658B2/ja
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel array of LEDs
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
JP2007096592A 2006-12-29 2007-04-02 発光ダイオード用駆動回路 Active JP4944658B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW095150085 2006-12-29
TW095150085A TW200829082A (en) 2006-12-29 2006-12-29 LED driving circuit

Publications (2)

Publication Number Publication Date
JP2008166674A JP2008166674A (ja) 2008-07-17
JP4944658B2 true JP4944658B2 (ja) 2012-06-06

Family

ID=39582915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007096592A Active JP4944658B2 (ja) 2006-12-29 2007-04-02 発光ダイオード用駆動回路

Country Status (4)

Country Link
US (1) US7479738B2 (enExample)
JP (1) JP4944658B2 (enExample)
KR (1) KR100907300B1 (enExample)
TW (1) TW200829082A (enExample)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
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DE202006021248U1 (de) * 2005-01-12 2014-02-13 Resmed Limited Stirnstützen für Gesichtsmasken
US8278830B2 (en) * 2008-07-15 2012-10-02 Intersil Americas Inc. Dynamic headroom control for LCD driver
KR100887637B1 (ko) * 2008-11-20 2009-03-11 유동준 광고표시장치
US8174212B2 (en) * 2008-11-30 2012-05-08 Microsemi Corp.—Analog Mixed Signal Group Ltd. LED string driver with light intensity responsive to input voltage
ITBS20080235A1 (it) 2008-12-22 2010-06-23 St Microelectronics Srl Circuito elettronico di alimentazione
CN201391794Y (zh) * 2009-03-21 2010-01-27 冯学经 带电池盒的led灯串装置
TW201105172A (en) 2009-07-30 2011-02-01 Advanced Connectek Inc Light emitting diode (LED) device and driving method thereof
US20110134021A1 (en) * 2009-12-08 2011-06-09 Nxp B.V. Method and apparatus for led driver color-sequential scan
CN102102828B (zh) * 2009-12-18 2014-02-05 华映视讯（吴江）有限公司 发光二极管模组
KR101661891B1 (ko) * 2009-12-22 2016-10-05 엘지디스플레이 주식회사 발광 다이오드 어레이의 구동 장치 및 구동 방법, 및 이를 이용한 액정 표시 장치
JP5533642B2 (ja) * 2010-12-27 2014-06-25 Ｎｋワークス株式会社 Ｌｅｄ駆動回路
KR101282072B1 (ko) * 2011-07-15 2013-07-05 주식회사 디엠비테크놀로지 Ｌｅｄ 패널의 과전압 보호장치 및 그 보호방법
KR101285644B1 (ko) * 2011-11-11 2013-07-12 주식회사 티엘아이 전류 감지 방식 엘이디 조명장치
KR101340295B1 (ko) * 2012-05-07 2013-12-11 주식회사 티엘아이 온도의 변화에 대하여 전류량의 변동을 완화하는 엘이디 조명장치
USRE47776E1 (en) * 2012-10-08 2019-12-17 Signify Holding B.V. Methods and apparatus for compensating a removal of LEDs from an LED array
USRE47969E1 (en) * 2012-10-08 2020-04-28 Signify Holding B.V. Methods and apparatus for compensating a removal of LEDs from an LED array
CN103345903B (zh) * 2013-07-15 2015-09-02 深圳市华星光电技术有限公司 一种led背光系统及显示装置
CN104333933B (zh) * 2013-07-22 2017-04-12 全汉企业股份有限公司 发光二极管驱动装置及应用其的发光二极管照明系统
US9318360B2 (en) 2013-10-11 2016-04-19 Applied Materials, Inc. Linear high packing density for LED arrays
US9273995B2 (en) * 2014-02-04 2016-03-01 Excelitas Technologies Philippines, Inc. Light emitting diode output power control
TWI768667B (zh) * 2021-01-20 2022-06-21 緯創資通股份有限公司 直下式背光發光二極體顯示器與發光控制方法
CN114882852A (zh) * 2022-05-07 2022-08-09 Tcl华星光电技术有限公司 画面异常调整方法、装置、服务器及存储介质
US12028949B2 (en) * 2022-05-27 2024-07-02 Stmicroelectronics S.R.L. LED array driver with channel to channel and channel to ground external pin short detection
CN119881729B (zh) * 2025-03-24 2025-07-29 上海艾为微电子技术有限公司 一种led的灯压检测装置、方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1322139A1 (en) * 2001-12-19 2003-06-25 Toyoda Gosei Co., Ltd. LED lamp apparatus for vehicles
JP2003218459A (ja) * 2002-01-22 2003-07-31 Fujitsu Access Ltd 光出力調整方法
JP2004311635A (ja) * 2003-04-04 2004-11-04 Olympus Corp 駆動装置及びそれを用いた照明装置、並びに、その照明装置を用いた表示装置
JP2005026431A (ja) * 2003-07-01 2005-01-27 Hunet Inc 発光ダイオード駆動回路
WO2005022596A2 (en) * 2003-08-27 2005-03-10 Osram Sylvania Inc. Driver circuit for led vehicle lamp
JP2005286290A (ja) * 2004-03-02 2005-10-13 Fuji Photo Film Co Ltd 発光素子の駆動制御方法および装置、並びに電子機器
US7045974B2 (en) 2004-08-19 2006-05-16 Radiant Opto-Electronics Corporation LED optical energy detection and feedback system
US7276861B1 (en) * 2004-09-21 2007-10-02 Exclara, Inc. System and method for driving LED
JP2006186243A (ja) * 2004-12-28 2006-07-13 Fuji Photo Film Co Ltd レーザー光源、色光源およびこれを用いた光走査型カラープロジェクター装置
DE602005025972D1 (de) * 2005-02-11 2011-03-03 St Microelectronics Srl Vorrichtung zur Versorgung einer mehrzweigigen Leuchtdiodenschaltung
JP2006303093A (ja) 2005-04-19 2006-11-02 Sony Corp Ｌｅｄ駆動装置
JP4657799B2 (ja) 2005-05-11 2011-03-23 株式会社リコー 発光ダイオード駆動回路
US7888881B2 (en) * 2005-07-28 2011-02-15 Exclara, Inc. Pulsed current averaging controller with amplitude modulation and time division multiplexing for arrays of independent pluralities of light emitting diodes
US20080001547A1 (en) * 2005-09-20 2008-01-03 Negru Sorin L Driving parallel strings of series connected LEDs
KR100917623B1 (ko) * 2006-02-13 2009-09-17 삼성전자주식회사 Ｌｅｄ 구동장치

Also Published As

Publication number Publication date
KR20080063012A (ko) 2008-07-03
TWI315165B (enExample) 2009-09-21
US20080157687A1 (en) 2008-07-03
JP2008166674A (ja) 2008-07-17
KR100907300B1 (ko) 2009-07-13
US7479738B2 (en) 2009-01-20
TW200829082A (en) 2008-07-01

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