SG131814A1 - Apparatus and method for regulating white leds - Google Patents

Apparatus and method for regulating white leds

Info

Publication number
SG131814A1
SG131814A1 SG200508327-4A SG2005083274A SG131814A1 SG 131814 A1 SG131814 A1 SG 131814A1 SG 2005083274 A SG2005083274 A SG 2005083274A SG 131814 A1 SG131814 A1 SG 131814A1
Authority
SG
Singapore
Prior art keywords
white leds
regulating white
regulating
leds
white
Prior art date
Application number
SG200508327-4A
Other languages
English (en)
Inventor
Mingkwang Han
Footshen Wong
Vlad Popescu
Winson Wong
Jacky Lin
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
Application filed by O2Micro Inc filed Critical O2Micro Inc
Publication of SG131814A1 publication Critical patent/SG131814A1/en

Links

Classifications

    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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
    • 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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
SG200508327-4A 2005-10-20 2005-12-22 Apparatus and method for regulating white leds SG131814A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/254,467 US7948455B2 (en) 2005-10-20 2005-10-20 Apparatus and method for regulating white LEDs

Publications (1)

Publication Number Publication Date
SG131814A1 true SG131814A1 (en) 2007-05-28

Family

ID=37984831

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200508327-4A SG131814A1 (en) 2005-10-20 2005-12-22 Apparatus and method for regulating white leds

Country Status (4)

Country Link
US (1) US7948455B2 (zh)
CN (2) CN100501830C (zh)
SG (1) SG131814A1 (zh)
TW (1) TWI314806B (zh)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI270219B (en) * 2005-03-08 2007-01-01 Addtek Corp Driving circuit and method of tuning a driving voltage of a light-emitting device through a feedback mechanism
TWI354966B (en) * 2006-10-19 2011-12-21 Richtek Technology Corp Backlight control circuit
KR100833764B1 (ko) * 2007-01-22 2008-05-29 삼성에스디아이 주식회사 직류-직류 컨버터를 갖는 유기 전계 발광 표시 장치
TWI362639B (en) * 2007-01-31 2012-04-21 Richtek Technology Corp Backlight control circuit with flexible configuration
EP2123128B1 (en) * 2007-03-15 2013-06-05 Philips Intellectual Property & Standards GmbH Driver circuit for loads such as led, oled or laser diodes
US7683553B2 (en) * 2007-05-01 2010-03-23 Pacifictech Microelectronics, Inc. LED current control circuits and methods
JP2009025735A (ja) * 2007-07-23 2009-02-05 Hitachi Displays Ltd 画像表示装置
DE102007051793B4 (de) * 2007-10-30 2009-08-27 Texas Instruments Deutschland Gmbh LED-Treiber mit adaptivem Algorithmus für Speicherkondensatorvorladung
KR100951258B1 (ko) * 2008-06-03 2010-04-02 삼성전기주식회사 발광 소자의 구동 회로
TWI406595B (zh) * 2008-07-25 2013-08-21 Richtek Technology Corp LED driver and controller for its use
TWI468080B (zh) * 2008-07-31 2015-01-01 Richtek Technology Corp LED drive device and method
CN101646282B (zh) * 2008-08-04 2014-07-02 立锜科技股份有限公司 Led驱动器及其控制器
TWI408643B (zh) * 2008-09-18 2013-09-11 Richtek Technology Corp Ｌｅｄ顯示系統及其控制方法以及該ｌｅｄ顯示系統的驅動器及其控制方法
CN101719345B (zh) * 2008-10-09 2012-12-05 立锜科技股份有限公司 Led显示系统及其控制方法以及该系统的驱动器及控制方法
CN101739943B (zh) * 2008-11-11 2013-09-18 立锜科技股份有限公司 改善led显示系统效能的电流调节器及方法
TWI398189B (zh) * 2008-12-23 2013-06-01 Novatek Microelectronics Corp 用以驅動電流驅動元件之驅動電路與其方法
DE102009004722A1 (de) * 2009-01-15 2010-07-22 Austriamicrosystems Ag Spannungswandler, Schaltungsanordnung und Verfahren zur Spannungswandlung
US8058810B2 (en) 2009-05-07 2011-11-15 Linear Technology Corporation Method and system for high efficiency, fast transient multi-channel LED driver
US8149373B2 (en) * 2009-05-28 2012-04-03 Chunghwa Picture Tubes, Ltd. Liquid crystal display
KR101658209B1 (ko) * 2009-06-26 2016-09-21 페어차일드코리아반도체 주식회사 Ｌｅｄ 발광 장치 및 그 구동 방법
KR101067142B1 (ko) * 2009-08-31 2011-09-22 삼성전기주식회사 선택적 피드백용 발광 다이오드 전류 제어모듈, 이를 사용하는 발광 다이오드 구동장치 및 구동방법
US8283876B2 (en) * 2009-09-17 2012-10-09 Dialog Semiconductor Gmbh Circuit for driving an infrared transmitter LED with temperature compensation
KR101064462B1 (ko) * 2009-11-17 2011-09-15 삼성모바일디스플레이주식회사 Ｄｃ―ｄｃ컨버터 및 이를 이용한 유기전계발광표시장치
US8400131B2 (en) * 2010-03-09 2013-03-19 Analog Devices, Inc. Voltage converter and LED driver circuits with progressive boost, skip, and linear mode operation
KR101788218B1 (ko) * 2011-01-06 2017-10-20 삼성디스플레이 주식회사 Ｄｃ-ｄｃ 컨버터 및 이를 이용한 이동통신 단말기
KR101871906B1 (ko) * 2011-06-30 2018-06-28 삼성디스플레이 주식회사 Ｄｃ-ｄｃ 컨버터 및 이를 포함한 유기전계발광 표시장치
CN102332243A (zh) * 2011-09-16 2012-01-25 明基电通有限公司 电源转换器及相关显示系统
US9013110B2 (en) * 2011-11-30 2015-04-21 Atmel Corporation Circuit for driving light emitting elements
US20130169610A1 (en) * 2011-12-30 2013-07-04 Stmicroelectronics (Shenzhen) R&D Co. Ltd. Driving circuit and display device
US8890045B2 (en) 2012-03-01 2014-11-18 Avago Technologies General Ip (Singapore) Pte. Ltd. Optical encoder with a current regulating circuit for a light emitter
US9119250B2 (en) * 2012-05-04 2015-08-25 Osram Sylvania Inc. Dimmable multichannel driver for solid state light sources
KR101985872B1 (ko) * 2012-06-27 2019-06-04 삼성전자주식회사 Ｌｅｄ 구동 장치, ｌｅｄ 구동 방법 및 컴퓨터 판독가능 기록매체
CN102930830B (zh) * 2012-10-30 2016-01-20 南京中电熊猫液晶显示科技有限公司 一种改善扫描式背光不均的方法
US9310644B2 (en) 2013-03-11 2016-04-12 Shenzhen China Star Optoelectronics Technology Co., Ltd Liquid crystal display, LED backlight source, and the driving method thereof
CN103117046A (zh) * 2013-03-11 2013-05-22 深圳市华星光电技术有限公司 液晶显示器、led背光源及其驱动方法
EP2790470B1 (en) * 2013-04-08 2018-03-21 Dialog Semiconductor GmbH Programmable current source with optimized compliance region for efficient backlighting in portable applications
TWI550570B (zh) * 2014-05-30 2016-09-21 鉅坤電子股份有限公司 發光二極體電源電路及其燈泡
US9614380B2 (en) * 2014-10-10 2017-04-04 Intersil Americas LLC Hysteretic current mode buck-boost control architecture
CN104602396B (zh) * 2014-11-21 2017-05-24 深圳市海思半导体有限公司 一种wled驱动器和驱动控制方法
EP3065280B1 (en) * 2015-03-03 2019-05-15 Tridonic GmbH & Co KG Operating device for a light emitting means and method of controlling an operating device
US10073167B2 (en) * 2015-05-22 2018-09-11 Texas Instruments Incorporated High speed illumination driver for TOF applications
KR102502208B1 (ko) * 2015-07-28 2023-02-22 삼성디스플레이 주식회사 직류-직류 변환기 및 이의 구동방법
CN106787844B (zh) * 2016-06-21 2023-06-30 中国工程物理研究院应用电子学研究所 紧凑型激光电源
CN106658829B (zh) * 2016-11-18 2018-05-22 佛山市谱德电子科技有限公司 一种背光源控制电路及显示装置
EP3393206B1 (en) * 2017-04-21 2024-09-18 Infineon Technologies AG Pixel selection method for a light-source matrix driver
KR102543063B1 (ko) * 2017-11-28 2023-06-14 삼성전자주식회사 외장 커패시터를 사용하지 않는 전압 레귤레이터 및 이를 포함하는 반도체 장치
CN109976436B (zh) * 2017-12-27 2021-03-23 瑞昱半导体股份有限公司 电压检测器与通信电路
CN109272947A (zh) * 2018-11-28 2019-01-25 厦门天马微电子有限公司 背光组件、显示装置和背光组件的驱动方法
US11682961B2 (en) * 2020-03-02 2023-06-20 Texas Instruments Incorporated Current regulator system
JPWO2021251375A1 (zh) * 2020-06-09 2021-12-16
CN114120926B (zh) * 2020-09-01 2023-03-10 元太科技工业股份有限公司 电压调节电路、电压调节方法及显示装置
TWI752610B (zh) 2020-09-01 2022-01-11 元太科技工業股份有限公司 電壓調節電路、電壓調節方法及顯示裝置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001143867A (ja) * 1999-11-18 2001-05-25 Nec Corp 有機ｅｌ駆動回路
JP3957150B2 (ja) * 2001-02-08 2007-08-15 セイコーインスツル株式会社 Ｌｅｄ駆動回路
US6690146B2 (en) * 2002-06-20 2004-02-10 Fairchild Semiconductor Corporation High efficiency LED driver
TWI237515B (en) * 2002-08-14 2005-08-01 Rohm Co Ltd Organic EL element drive circuit and organic EL display device using the same
KR100511788B1 (ko) * 2002-08-28 2005-09-02 엘지.필립스 엘시디 주식회사 일렉트로-루미네센스 표시패널의 데이터 구동장치
US6836157B2 (en) * 2003-05-09 2004-12-28 Semtech Corporation Method and apparatus for driving LEDs
JP3953443B2 (ja) * 2003-07-08 2007-08-08 ローム株式会社 昇降圧ｄｃ−ｄｃコンバータ及びこれを用いたポータブル機器
JP4342262B2 (ja) * 2003-10-03 2009-10-14 アルエイド株式会社 Ｌｅｄ点灯制御装置、ｌｅｄ点灯制御方法

Also Published As

Publication number Publication date
CN100501830C (zh) 2009-06-17
CN1953029A (zh) 2007-04-25
CN101488324A (zh) 2009-07-22
US7948455B2 (en) 2011-05-24
US20070091036A1 (en) 2007-04-26
TW200717392A (en) 2007-05-01
TWI314806B (en) 2009-09-11
CN101488324B (zh) 2011-01-26

Similar Documents

Publication Publication Date Title
SG131814A1 (en) Apparatus and method for regulating white leds
GB2421367B (en) Lighting apparatus and method
EP1965712A4 (en) DEVICE AND METHOD FOR INTRODUCING IMPLANTS
EP2082355A4 (en) METHOD AND DEVICE FOR IDENTIFYING FACIAL AREAS
EP2137028A4 (en) APPARATUS AND METHOD FOR CONTROLLING A HEADLIGHT
GB0501688D0 (en) Method and apparatus
GB0506186D0 (en) Apparatus and method
GB0621488D0 (en) Apparatus and method
GB0526501D0 (en) Method and Apparatus
HK1174769A1 (zh) 控製器及其方法
TWI350701B (en) Method and apparatus for adjusting saturation level
GB0611868D0 (en) Method and apparatus
GB0605136D0 (en) Apparatus and method
GB0513613D0 (en) Apparatus and method
GB0508695D0 (en) Apparatus and method
GB0502318D0 (en) Apparatus and method
EP1856733A4 (en) METHOD FOR LED MICRO PACKAGING AND MICRO PACKAGING
GB0401389D0 (en) Illumination method and apparatus
GB0517531D0 (en) Method and apparatus
GB0509526D0 (en) Method and apparatus
GB0504469D0 (en) Method and apparatus
GB0502053D0 (en) Moving lighting effect and apparatus and method therefor
GB0509450D0 (en) Method and apparatus
GB2430277B (en) Methods and apparatus for constant-current regulation
TWI349491B (en) White balance method and image adjusting apparatus