WO2005038828A3 - A current sharing scheme and device for multiple ccf lamp operation - Google Patents

A current sharing scheme and device for multiple ccf lamp operation Download PDF

Info

Publication number
WO2005038828A3
WO2005038828A3 PCT/US2004/032738 US2004032738W WO2005038828A3 WO 2005038828 A3 WO2005038828 A3 WO 2005038828A3 US 2004032738 W US2004032738 W US 2004032738W WO 2005038828 A3 WO2005038828 A3 WO 2005038828A3
Authority
WO
WIPO (PCT)
Prior art keywords
lamps
current sharing
lamp operation
sharing scheme
balancing transformers
Prior art date
Application number
PCT/US2004/032738
Other languages
French (fr)
Other versions
WO2005038828A2 (en
Inventor
Xiaoping Jin
Original Assignee
Microsemi 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 Microsemi Corp filed Critical Microsemi Corp
Priority to AT04794179T priority Critical patent/ATE458382T1/en
Priority to JP2006534250A priority patent/JP4658061B2/en
Priority to EP04794179A priority patent/EP1671521B1/en
Priority to DE602004025593T priority patent/DE602004025593D1/en
Priority to KR1020067006590A priority patent/KR101085579B1/en
Priority to CN2004800348936A priority patent/CN1887034B/en
Publication of WO2005038828A2 publication Critical patent/WO2005038828A2/en
Publication of WO2005038828A3 publication Critical patent/WO2005038828A3/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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • H05B41/245—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency for a plurality of lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers

Abstract

A ring balancer comprising a plurality of balancing transformers (102) facilitates current sharing in a multi-lamp backlight system. The balancing transformers (102) have respective primary windings separately coupled in series with designated lamps (104) and have respective secondary windings coupled together in a closed loop. The secondary windings conduct a common current (Ix) and the respective primary windings conduct proportional currents to balance currents among the lamps (104). The ring balancer facilitates automatic lamp striking and the lamps (104) can be advantageously driven by a common voltage source (100).
PCT/US2004/032738 2003-10-06 2004-10-05 A current sharing scheme and device for multiple ccf lamp operation WO2005038828A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT04794179T ATE458382T1 (en) 2003-10-06 2004-10-05 POWER SHARING SCHEMATIC AND DEVICE FOR MULTIPLE CCF LAMP OPERATION
JP2006534250A JP4658061B2 (en) 2003-10-06 2004-10-05 Current distribution method and apparatus for operating a plurality of CCF lamps
EP04794179A EP1671521B1 (en) 2003-10-06 2004-10-05 A current sharing scheme and device for multiple ccf lamp operation
DE602004025593T DE602004025593D1 (en) 2003-10-06 2004-10-05 CIRCUIT SCHEME AND DEVICE FOR MULTIPLE CCF LAMP OPERATION
KR1020067006590A KR101085579B1 (en) 2003-10-06 2004-10-05 A current sharing scheme and device for multiple ccf lamp operation
CN2004800348936A CN1887034B (en) 2003-10-06 2004-10-05 A current sharing scheme and device for multiple CCF lamp operation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50893203P 2003-10-06 2003-10-06
US60/508,932 2003-10-06

Publications (2)

Publication Number Publication Date
WO2005038828A2 WO2005038828A2 (en) 2005-04-28
WO2005038828A3 true WO2005038828A3 (en) 2005-12-08

Family

ID=34465091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/032738 WO2005038828A2 (en) 2003-10-06 2004-10-05 A current sharing scheme and device for multiple ccf lamp operation

Country Status (10)

Country Link
US (5) US7294971B2 (en)
EP (1) EP1671521B1 (en)
JP (1) JP4658061B2 (en)
KR (1) KR101085579B1 (en)
CN (1) CN1887034B (en)
AT (1) ATE458382T1 (en)
DE (1) DE602004025593D1 (en)
ES (1) ES2340169T3 (en)
TW (1) TWI276370B (en)
WO (1) WO2005038828A2 (en)

Families Citing this family (127)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6114814A (en) * 1998-12-11 2000-09-05 Monolithic Power Systems, Inc. Apparatus for controlling a discharge lamp in a backlighted display
JP2004335443A (en) * 2003-02-10 2004-11-25 Masakazu Ushijima Inverter circuit for discharge tube for multiple lamp lighting, and surface light source system
US7589478B2 (en) * 2003-02-10 2009-09-15 Masakazu Ushijima Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system
US7187139B2 (en) * 2003-09-09 2007-03-06 Microsemi Corporation Split phase inverters for CCFL backlight system
ATE458382T1 (en) 2003-10-06 2010-03-15 Microsemi Corp POWER SHARING SCHEMATIC AND DEVICE FOR MULTIPLE CCF LAMP OPERATION
US7141933B2 (en) * 2003-10-21 2006-11-28 Microsemi Corporation Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel
WO2005045311A2 (en) * 2003-11-03 2005-05-19 Monolithic Power Systems, Inc. Driver for light source having integrated photosensitive elements for driver control
US7183724B2 (en) * 2003-12-16 2007-02-27 Microsemi Corporation Inverter with two switching stages for driving lamp
TWI254270B (en) * 2004-01-15 2006-05-01 Hon Hai Prec Ind Co Ltd Lighting apparatus formed by serially driving lighting units
US7468722B2 (en) 2004-02-09 2008-12-23 Microsemi Corporation Method and apparatus to control display brightness with ambient light correction
JP4658110B2 (en) * 2004-03-19 2011-03-23 昌和 牛嶋 Discharge tube parallel lighting system for surface light source
JP4101228B2 (en) * 2004-03-19 2008-06-18 昌和 牛嶋 Discharge tube parallel lighting system for surface light source
US7112929B2 (en) 2004-04-01 2006-09-26 Microsemi Corporation Full-bridge and half-bridge compatible driver timing schedule for direct drive backlight system
US7250731B2 (en) * 2004-04-07 2007-07-31 Microsemi Corporation Primary side current balancing scheme for multiple CCF lamp operation
US7755595B2 (en) 2004-06-07 2010-07-13 Microsemi Corporation Dual-slope brightness control for transflective displays
US7368880B2 (en) 2004-07-19 2008-05-06 Intersil Americas Inc. Phase shift modulation-based control of amplitude of AC voltage output produced by double-ended DC-AC converter circuitry for powering high voltage load such as cold cathode fluorescent lamp
US7323829B2 (en) * 2004-08-20 2008-01-29 Monolithic Power Systems, Inc. Minimizing bond wire power losses in integrated circuit full bridge CCFL drivers
JP4866397B2 (en) * 2004-09-01 2012-02-01 昌和 牛嶋 Parallel lighting module and balancer coil for discharge tubes
JP4219340B2 (en) * 2004-09-01 2009-02-04 昌和 牛嶋 Parallel lighting module and balancer coil for discharge tubes
JP4561254B2 (en) * 2004-09-03 2010-10-13 セイコーエプソン株式会社 Device management system
JP2006108667A (en) * 2004-09-30 2006-04-20 Greatchip Technology Co Ltd Inverter transformer
TWI318084B (en) 2004-10-13 2009-12-01 Monolithic Power Systems Inc Methods and protection schemes for driving discharge lamps in large panel applications
CN101668374A (en) * 2004-11-05 2010-03-10 太阳诱电株式会社 Lamp-lighting apparatus
JP2006156338A (en) * 2004-11-05 2006-06-15 Taiyo Yuden Co Ltd Lamp lighting device
US20060119293A1 (en) * 2004-12-03 2006-06-08 Chun-Kong Chan Lamp load-sharing circuit
TWI345430B (en) * 2005-01-19 2011-07-11 Monolithic Power Systems Inc Method and apparatus for dc to ac power conversion for driving discharge lamps
US7560872B2 (en) * 2005-01-31 2009-07-14 Intersil Americas Inc. DC-AC converter having phase-modulated, double-ended, half-bridge topology for powering high voltage load such as cold cathode fluorescent lamp
US7564193B2 (en) 2005-01-31 2009-07-21 Intersil Americas Inc. DC-AC converter having phase-modulated, double-ended, full-bridge topology for powering high voltage load such as cold cathode fluorescent lamp
US7173382B2 (en) * 2005-03-31 2007-02-06 Microsemi Corporation Nested balancing topology for balancing current among multiple lamps
US7061183B1 (en) * 2005-03-31 2006-06-13 Microsemi Corporation Zigzag topology for balancing current among paralleled gas discharge lamps
US20060244395A1 (en) * 2005-05-02 2006-11-02 Taipale Mark S Electronic ballast having missing lamp detection
TWI326564B (en) * 2005-05-03 2010-06-21 Darfon Electronics Corp Power supply circuit for lamp and transformer therefor
TWI330346B (en) * 2005-06-15 2010-09-11 Chi Mei Optoelectronics Corp Liquid crystal display, backlight module and lamp driving apparatus thereof
US7196483B2 (en) * 2005-06-16 2007-03-27 Au Optronics Corporation Balanced circuit for multi-LED driver
TWI284332B (en) 2005-07-06 2007-07-21 Monolithic Power Systems Inc Equalizing discharge lamp currents in circuits
US7439685B2 (en) * 2005-07-06 2008-10-21 Monolithic Power Systems, Inc. Current balancing technique with magnetic integration for fluorescent lamps
TWI350128B (en) * 2005-08-10 2011-10-01 Au Optronics Corp Lamp drive circuit
US7446485B2 (en) * 2005-08-24 2008-11-04 Beyond Innovation Technology Co., Ltd. Multi-lamp driving system
US7420829B2 (en) 2005-08-25 2008-09-02 Monolithic Power Systems, Inc. Hybrid control for discharge lamps
CN100426056C (en) * 2005-08-26 2008-10-15 鸿富锦精密工业（深圳）有限公司 Multiple lamp tube driving system and method
US7253569B2 (en) * 2005-08-31 2007-08-07 02Micro International Limited Open lamp detection in an EEFL backlight system
US7291991B2 (en) * 2005-10-13 2007-11-06 Monolithic Power Systems, Inc. Matrix inverter for driving multiple discharge lamps
CN1953631A (en) * 2005-10-17 2007-04-25 美国芯源系统股份有限公司 A DC/AC power supply device for the backlight application of cold-cathode fluorescent lamp
US7372213B2 (en) * 2005-10-19 2008-05-13 O2Micro International Limited Lamp current balancing topologies
US7423384B2 (en) 2005-11-08 2008-09-09 Monolithic Power Systems, Inc. Lamp voltage feedback system and method for open lamp protection and shorted lamp protection
KR101147181B1 (en) * 2005-11-17 2012-05-25 삼성전자주식회사 Inverter circuit, backlight assembly and liquid crystal display having the same
KR101147179B1 (en) * 2005-11-17 2012-05-25 삼성전자주식회사 Inverter circuit, backlight, and lcd
KR101242124B1 (en) * 2005-11-30 2013-03-12 삼성디스플레이 주식회사 Back light assembly and liquid crystal display unit using the same
KR101164199B1 (en) * 2005-11-30 2012-07-11 삼성전자주식회사 Inverter circuit, backlight device, and liquid crystal display device using the same
KR20070059721A (en) * 2005-12-07 2007-06-12 삼성전자주식회사 Inverter circuit, back light assembly and liquid crystal display device having the same
US7394203B2 (en) * 2005-12-15 2008-07-01 Monolithic Power Systems, Inc. Method and system for open lamp protection
KR20070074999A (en) * 2006-01-11 2007-07-18 삼성전자주식회사 Apparatus for driving lamp and liquid crystal display having the same
US8344658B2 (en) * 2006-01-19 2013-01-01 International Rectifier Corporation Cold-cathode fluorescent lamp multiple lamp current matching circuit
US7268500B2 (en) * 2006-01-20 2007-09-11 Logah Technology Corp. Control device for multiple lamp currents of liquid crystal display backlight source
US7429835B2 (en) * 2006-02-07 2008-09-30 Himax Technologies Limited Backlight module driver circuit
JP2007280916A (en) * 2006-03-17 2007-10-25 Taiyo Yuden Co Ltd Lamp lighting device
JP4664226B2 (en) 2006-04-04 2011-04-06 スミダコーポレーション株式会社 Discharge tube drive circuit
US7619371B2 (en) * 2006-04-11 2009-11-17 Monolithic Power Systems, Inc. Inverter for driving backlight devices in a large LCD panel
JP2007288872A (en) 2006-04-13 2007-11-01 Rohm Co Ltd Inverter device, light-emitting apparatus employing same, and image display apparatus
US7804254B2 (en) * 2006-04-19 2010-09-28 Monolithic Power Systems, Inc. Method and circuit for short-circuit and over-current protection in a discharge lamp system
US7830100B2 (en) * 2006-04-28 2010-11-09 Ampower Technology Co., Ltd. System for driving a plurality of lamps
TWI391029B (en) * 2007-12-31 2013-03-21 Ampower Technology Co Ltd System for driving a plurality of discharge lamps
JP4841481B2 (en) 2006-05-18 2011-12-21 スミダコーポレーション株式会社 Balance transformer
JP2007317503A (en) * 2006-05-25 2007-12-06 Sanken Electric Co Ltd Discharge lamp lighting device
CN101080128B (en) * 2006-05-26 2012-10-03 昂宝电子（上海）有限公司 Cycle framework driving system and method of multi-tube CCFL and/or EEFL
US7420337B2 (en) * 2006-05-31 2008-09-02 Monolithic Power Systems, Inc. System and method for open lamp protection
JP4870484B2 (en) * 2006-06-26 2012-02-08 スミダコーポレーション株式会社 Inverter transformer
KR100721170B1 (en) 2006-07-03 2007-05-23 삼성전기주식회사 Current balance curcuit
US7569998B2 (en) 2006-07-06 2009-08-04 Microsemi Corporation Striking and open lamp regulation for CCFL controller
JP4584880B2 (en) 2006-07-27 2010-11-24 スミダコーポレーション株式会社 Inverter circuit
JP4784648B2 (en) * 2006-07-28 2011-10-05 パナソニック株式会社 Discharge lighting system
DE102006040026B4 (en) * 2006-08-25 2015-06-18 Minebea Co., Ltd. Transformer for current balancing
JP2008066071A (en) * 2006-09-06 2008-03-21 Taiyo Yuden Co Ltd Lamp driving device
KR20080024000A (en) * 2006-09-12 2008-03-17 삼성전자주식회사 Backlight module, driving circuit for light emitting device and liquid crystal display
TW200814853A (en) * 2006-09-13 2008-03-16 Greatchip Technology Co Ltd Current balanced circuit for discharge lamp
US8054001B2 (en) * 2006-09-18 2011-11-08 O2Micro Inc Circuit structure for LCD backlight
TWI314743B (en) * 2006-09-28 2009-09-11 Darfon Electronics Corp Transformer and multi-lamp driving circuit using the same
TWI382384B (en) * 2006-10-25 2013-01-11 Gigno Technology Co Ltd Inverter and driving device of backlight module
US7893628B2 (en) * 2006-11-22 2011-02-22 Minebea Co., Ltd. Electronic circuit for operating a plurality of gas discharge lamps at a common voltage source
KR100849795B1 (en) * 2007-03-26 2008-07-31 삼성전기주식회사 Current balancing circuit which can be easy electrical connecting
GB2447963B (en) * 2007-03-29 2011-11-16 E2V Tech High frequency transformer for high voltage applications
KR100826413B1 (en) * 2007-04-27 2008-04-29 삼성전기주식회사 Multi-lamp driving apparatus
CN101311793B (en) * 2007-05-25 2010-07-07 群康科技(深圳)有限公司 Backlight module
US8058809B2 (en) * 2007-07-02 2011-11-15 O2Micro, Inc. Circuits and methods for balancing current among multiple loads
CN101365280B (en) * 2007-08-09 2014-03-12 皇家飞利浦电子股份有限公司 Lamp driving circuit
JP2009044915A (en) * 2007-08-10 2009-02-26 Sanken Electric Co Ltd Power supply device
CN101409972B (en) * 2007-10-12 2016-10-05 昂宝电子（上海）有限公司 For multiple cold cathode fluorescence lamps and/or the drive system of external-electrode fluorescent lamp and method
US20100057627A1 (en) * 2008-09-04 2010-03-04 Lutnick Howard W Non-firm orders in electronic marketplaces
CN101453818B (en) * 2007-11-29 2014-03-19 杭州茂力半导体技术有限公司 Discharge lamp circuit protection and regulation apparatus
TWI409739B (en) * 2008-01-22 2013-09-21 Innolux Corp Flat display and backlight module thereof
DE102008005792B4 (en) 2008-01-23 2010-04-08 Minebea Co., Ltd. Electronic circuit and method for operating a plurality of gas discharge lamps at a common voltage source
TW200948201A (en) * 2008-02-05 2009-11-16 Microsemi Corp Arrangement suitable for driving floating CCFL based backlight
TWI408636B (en) * 2008-02-14 2013-09-11 Au Optronics Corp Light driving circuit device and backlight device
KR100945998B1 (en) * 2008-04-11 2010-03-09 삼성전기주식회사 Multi-lamps driver having current balancing fuction and sencing fuction
TWM341229U (en) * 2008-04-23 2008-09-21 Darfon Electronics Corp Backlight module
JP2010029058A (en) 2008-06-05 2010-02-04 Rohm Co Ltd Inverter device, drive device for fluorescent lamp and control method thereof, light-emitting apparatus employing them, and display
JP4586905B2 (en) * 2008-08-13 2010-11-24 ソニー株式会社 Light emitting diode drive device
US8093839B2 (en) 2008-11-20 2012-01-10 Microsemi Corporation Method and apparatus for driving CCFL at low burst duty cycle rates
US8189313B1 (en) * 2008-12-03 2012-05-29 Analog Devices, Inc. Fault detection and handling for current sources
KR20100066603A (en) * 2008-12-10 2010-06-18 삼성전자주식회사 Power supply device and control method of the same
CN201369869Y (en) * 2009-01-16 2009-12-23 国琏电子（上海）有限公司 Multi lamp-tube driving circuit
DE102009005018B3 (en) * 2009-01-17 2010-05-27 Minebea Co., Ltd. Electronic circuit for breakup of current from source in pre-determined ratio, has bipolar transistors whose bases are connected with each other by base resistance, where one of bases is connected directly with load
DE102009008657B3 (en) * 2009-02-12 2010-07-22 Minebea Co., Ltd. Electric circuit for operating gas-discharge lamp at alternating current power source, has ring exhibiting half of high impedance earth connections from virtual point to earth potential over detection circuit when lamp is provided in ring
US7944152B2 (en) * 2009-05-13 2011-05-17 Chicony Power Technology Co., Ltd. Two-stage balancer for multi-lamp backlight
US8350488B2 (en) 2009-06-30 2013-01-08 Microsemi Corporation Integrated backlight control system
KR101101656B1 (en) 2009-08-25 2011-12-30 삼성전기주식회사 Current balance circuit having protection function and power supply
KR101053408B1 (en) * 2010-02-23 2011-08-01 삼성전기주식회사 Driver for back light unit
CN102195510B (en) * 2010-03-08 2014-09-03 苏州奥曦特电子科技有限公司 Single-switch oscillating inverter
DE102010023928A1 (en) * 2010-06-09 2011-12-15 Minebea Co., Ltd. Electric circuit for operating lamp with alternating current source for backlight unit of LCD in flat TV, has pattern lamp secondary winding connected with high impedance ground connections
US8816606B2 (en) * 2010-06-15 2014-08-26 Microsemi Corporation Lips backlight control architecture with low cost dead time transfer
US9030119B2 (en) 2010-07-19 2015-05-12 Microsemi Corporation LED string driver arrangement with non-dissipative current balancer
DE102010041618A1 (en) 2010-09-29 2011-12-22 Osram Gesellschaft mit beschränkter Haftung Circuit configuration for operating semiconductor light sources e.g. LEDs, has series capacitor switched between electrical energy converter and input terminal of rectifiers in one of operation strands
DE102010041613A1 (en) 2010-09-29 2012-03-29 Osram Ag Circuit device for operating semiconductor light sources, has current-compensated choke switched between switch and rectifier, where leakage inductance of current-compensated choke is used as converter inductance
DE102010041632A1 (en) 2010-09-29 2012-03-29 Osram Gesellschaft mit beschränkter Haftung Circuit arrangement for operating at least two semiconductor light sources
CN103262650B (en) 2010-10-24 2016-06-01 美高森美公司 Synchronization Control to LED strip driver
US9614452B2 (en) 2010-10-24 2017-04-04 Microsemi Corporation LED driving arrangement with reduced current spike
US8432104B2 (en) 2010-12-09 2013-04-30 Delta Electronics, Inc. Load current balancing circuit
DE102010063867A1 (en) * 2010-12-22 2012-06-28 Tridonic Gmbh & Co Kg Ignition control and ignition detection of gas discharge lamps
US8754581B2 (en) 2011-05-03 2014-06-17 Microsemi Corporation High efficiency LED driving method for odd number of LED strings
CN103477712B (en) 2011-05-03 2015-04-08 美高森美公司 High efficiency LED driving method
WO2014007803A1 (en) * 2012-07-02 2014-01-09 Alejandro Cavolina Toroidal transformer transistor driver for electrical ballast
CA2818547C (en) * 2012-09-18 2014-08-12 Ming Zheng Multi-coil spark ignition system
US10085316B2 (en) * 2015-09-16 2018-09-25 Philips Lighting Holding B.V. Circuit for LED driver
CN105140010B (en) * 2015-09-23 2017-04-12 四川菲博斯科技有限责任公司 Ring transformer
CN105118632B (en) * 2015-09-23 2017-04-12 四川菲博斯科技有限责任公司 Transformer
ITUB20169852A1 (en) * 2016-01-07 2017-07-07 Massimo Veggian EQUIPMENT AND METHOD OF TRANSFORMATION OF ALTERNATE ELECTRICITY
CN109996366A (en) * 2017-12-29 2019-07-09 简斯任 LED illumination system with dimming function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574222A (en) * 1983-12-27 1986-03-04 General Electric Company Ballast circuit for multiple parallel negative impedance loads
US4663570A (en) * 1984-08-17 1987-05-05 Lutron Electronics Co., Inc. High frequency gas discharge lamp dimming ballast
US6717371B2 (en) * 2001-07-23 2004-04-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast for operating at least one low-pressure discharge lamp
US6765354B2 (en) * 2000-10-09 2004-07-20 Tridonicatco Gmbh & Co. Kg Circuitry arrangement for the operation of a plurality of gas discharge lamps

Family Cites Families (182)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429162A (en) 1943-01-18 1947-10-14 Boucher And Keiser Company Starting and operating of fluorescent lamps
US2440984A (en) * 1945-06-18 1948-05-04 Gen Electric Magnetic testing apparatus and method
US2572258A (en) 1946-07-20 1951-10-23 Picker X Ray Corp Waite Mfg X-ray tube safety device
US2968028A (en) * 1956-06-21 1961-01-10 Fuje Tsushinki Seizo Kabushiki Multi-signals controlled selecting systems
US2965799A (en) 1957-09-26 1960-12-20 Gen Electric Fluorescent lamp ballast
US3141112A (en) 1962-08-20 1964-07-14 Gen Electric Ballast apparatus for starting and operating electric discharge lamps
DE1671007B2 (en) * 1965-11-23 1971-04-08 MANGAN ZINC FERRITE CORE WITH HIGH INITIAL PERMEABILITY
US3676734A (en) * 1968-11-15 1972-07-11 Tokai Rika Co Ltd Electric circuit for rapidly igniting a discharge tube
US3597656A (en) * 1970-03-16 1971-08-03 Rucker Co Modulating ground fault detector and interrupter
US3611021A (en) 1970-04-06 1971-10-05 North Electric Co Control circuit for providing regulated current to lamp load
US3683923A (en) * 1970-09-25 1972-08-15 Valleylab Inc Electrosurgery safety circuit
US3742330A (en) 1971-09-07 1973-06-26 Delta Electronic Control Corp Current mode d c to a c converters
US3737755A (en) 1972-03-22 1973-06-05 Bell Telephone Labor Inc Regulated dc to dc converter with regulated current source driving a nonregulated inverter
US3936696A (en) 1973-08-27 1976-02-03 Lutron Electronics Co., Inc. Dimming circuit with saturated semiconductor device
US3944888A (en) * 1974-10-04 1976-03-16 I-T-E Imperial Corporation Selective tripping of two-pole ground fault interrupter
US4060751A (en) 1976-03-01 1977-11-29 General Electric Company Dual mode solid state inverter circuit for starting and ballasting gas discharge lamps
US4051410A (en) * 1976-09-02 1977-09-27 General Electric Company Discharge lamp operating circuit
US6002210A (en) 1978-03-20 1999-12-14 Nilssen; Ole K. Electronic ballast with controlled-magnitude output voltage
US4388562A (en) * 1980-11-06 1983-06-14 Astec Components, Ltd. Electronic ballast circuit
US4353009A (en) 1980-12-19 1982-10-05 Gte Products Corporation Dimming circuit for an electronic ballast
US4523130A (en) * 1981-10-07 1985-06-11 Cornell Dubilier Electronics Inc. Four lamp modular lighting control
US4463287A (en) * 1981-10-07 1984-07-31 Cornell-Dubilier Corp. Four lamp modular lighting control
US4700113A (en) 1981-12-28 1987-10-13 North American Philips Corporation Variable high frequency ballast circuit
US4441054A (en) * 1982-04-12 1984-04-03 Gte Products Corporation Stabilized dimming circuit for lamp ballasts
US4630005A (en) 1982-05-03 1986-12-16 Brigham Young University Electronic inverter, particularly for use as ballast
US4567319A (en) * 1982-12-28 1986-01-28 Plastiflex Company International Lightweight current-carrying hose
US4698554A (en) 1983-01-03 1987-10-06 North American Philips Corporation Variable frequency current control device for discharge lamps
JPS60518A (en) * 1983-06-16 1985-01-05 Hayashibara Takeshi Device for responding dropped voltage at nonlinear section of diode
US4562338A (en) 1983-07-15 1985-12-31 Osaka Titanium Co., Ltd. Heating power supply apparatus for polycrystalline semiconductor rods
JPS60139541A (en) * 1983-12-27 1985-07-24 Fuji Heavy Ind Ltd Clutch torque controller of solenoid clutch of vehicle
JPS60163397A (en) * 1984-02-03 1985-08-26 シャープ株式会社 Device for firing fluorescent lamp
US4567379A (en) 1984-05-23 1986-01-28 Burroughs Corporation Parallel current sharing system
US6472827B1 (en) 1984-10-05 2002-10-29 Ole K. Nilssen Parallel-resonant inverter-type fluorescent lamp ballast
US4672300A (en) * 1985-03-29 1987-06-09 Braydon Corporation Direct current power supply using current amplitude modulation
BE902709A (en) * 1985-06-20 1985-12-20 Backer Adrien Sa METHOD AND DEVICE FOR MONITORING LIGHT BEACONS.
US4780696A (en) 1985-08-08 1988-10-25 American Telephone And Telegraph Company, At&T Bell Laboratories Multifilar transformer apparatus and winding method
GB2179477B (en) 1985-08-23 1989-03-30 Ferranti Plc Power supply circuit
US4622496A (en) 1985-12-13 1986-11-11 Energy Technologies Corp. Energy efficient reactance ballast with electronic start circuit for the operation of fluorescent lamps of various wattages at standard levels of light output as well as at increased levels of light output
US4686059A (en) * 1986-02-12 1987-08-11 First Brands Corporation Antimony tartrate corrosion inhibitive composition for coolant systems
DK339586D0 (en) * 1986-07-16 1986-07-16 Silver Gruppen Prod As ELECTRONIC BALLAST
DE3783551T2 (en) * 1986-10-17 1993-07-15 Toshiba Kawasaki Kk POWER SUPPLY DEVICE FOR DISCHARGE LOAD.
US4766353A (en) 1987-04-03 1988-08-23 Sunlass U.S.A., Inc. Lamp switching circuit and method
US4761722A (en) 1987-04-09 1988-08-02 Rca Corporation Switching regulator with rapid transient response
JPH061413B2 (en) 1987-07-16 1994-01-05 ニシム電子工業株式会社 Ferro-resonant transformer for three-phase constant voltage
JPH01189897A (en) * 1988-01-26 1989-07-31 Tokyo Electric Co Ltd Discharge lamp lighting device
US4902942A (en) 1988-06-02 1990-02-20 General Electric Company Controlled leakage transformer for fluorescent lamp ballast including integral ballasting inductor
JPH0722055B2 (en) * 1988-06-29 1995-03-08 ニシム電子工業株式会社 Ferro-resonant three-phase constant voltage transformer device
US4847745A (en) * 1988-11-16 1989-07-11 Sundstrand Corp. Three phase inverter power supply with balancing transformer
US4912372A (en) * 1988-11-28 1990-03-27 Multi Electric Mfg. Co. Power circuit for series connected loads
US5057808A (en) 1989-12-27 1991-10-15 Sundstrand Corporation Transformer with voltage balancing tertiary winding
US5030887A (en) * 1990-01-29 1991-07-09 Guisinger John E High frequency fluorescent lamp exciter
US5036255A (en) 1990-04-11 1991-07-30 Mcknight William E Balancing and shunt magnetics for gaseous discharge lamps
KR960006714B1 (en) * 1990-05-28 1996-05-22 가부시끼가이샤 도시바 Semiconductor device fabrication process
US5173643A (en) 1990-06-25 1992-12-22 Lutron Electronics Co., Inc. Circuit for dimming compact fluorescent lamps
US6121733A (en) 1991-06-10 2000-09-19 Nilssen; Ole K. Controlled inverter-type fluorescent lamp ballast
US6127785A (en) 1992-03-26 2000-10-03 Linear Technology Corporation Fluorescent lamp power supply and control circuit for wide range operation
US5563473A (en) 1992-08-20 1996-10-08 Philips Electronics North America Corp. Electronic ballast for operating lamps in parallel
EP0587923A1 (en) * 1992-09-14 1994-03-23 U.R.D. Co. Ltd. High-frequency constant-current feeding system
GB9223440D0 (en) * 1992-11-09 1992-12-23 Tunewell Transformers Ltd Improvements in or relating to an electrical arrangement
JP3304449B2 (en) * 1992-12-11 2002-07-22 松下電工株式会社 Discharge lamp lighting device
US5349272A (en) 1993-01-22 1994-09-20 Gulton Industries, Inc. Multiple output ballast circuit
US5434477A (en) 1993-03-22 1995-07-18 Motorola Lighting, Inc. Circuit for powering a fluorescent lamp having a transistor common to both inverter and the boost converter and method for operating such a circuit
US5485057A (en) * 1993-09-02 1996-01-16 Smallwood; Robert C. Gas discharge lamp and power distribution system therefor
DE4333253A1 (en) 1993-09-30 1995-04-06 Deutsche Aerospace Circuit arrangement for adapting an unbalanced line system to a balanced line system
US5475284A (en) 1994-05-03 1995-12-12 Osram Sylvania Inc. Ballast containing circuit for measuring increase in DC voltage component
US5539281A (en) * 1994-06-28 1996-07-23 Energy Savings, Inc. Externally dimmable electronic ballast
US5574356A (en) 1994-07-08 1996-11-12 Northrop Grumman Corporation Active neutral current compensator
US5574335A (en) 1994-08-02 1996-11-12 Osram Sylvania Inc. Ballast containing protection circuit for detecting rectification of arc discharge lamp
JP2891449B2 (en) * 1994-08-03 1999-05-17 株式会社日立製作所 Discharge lamp lighting device
US5615093A (en) * 1994-08-05 1997-03-25 Linfinity Microelectronics Current synchronous zero voltage switching resonant topology
US5557249A (en) 1994-08-16 1996-09-17 Reynal; Thomas J. Load balancing transformer
KR0137917B1 (en) 1994-10-28 1998-05-15 김광호 Back-light driving circuit of liquid crystal display element
US5519289A (en) * 1994-11-07 1996-05-21 Jrs Technology Associates, Inc. Electronic ballast with lamp current correction circuit
US5652479A (en) 1995-01-25 1997-07-29 Micro Linear Corporation Lamp out detection for miniature cold cathode fluorescent lamp system
US5754012A (en) 1995-01-25 1998-05-19 Micro Linear Corporation Primary side lamp current sensing for minature cold cathode fluorescent lamp system
JP3543236B2 (en) 1995-03-06 2004-07-14 株式会社キジマ Push-pull inverter
KR0148053B1 (en) 1995-05-12 1998-09-15 김광호 Backlight driving control device and its driving control method of liquid crystal display elements
DE69530077T2 (en) 1995-07-31 2003-11-27 St Microelectronics Srl Start circuit, MOS transistor with such a circuit
EP0766500B1 (en) * 1995-09-27 2001-12-12 Koninklijke Philips Electronics N.V. Ballast with balancer transformer for fluorescent lamps
US6198238B1 (en) 1995-12-07 2001-03-06 Borealis Technical Limited High phase order cycloconverting generator and drive means
JP3292229B2 (en) 1995-12-11 2002-06-17 レシップ株式会社 Power supply for sign light
TW381409B (en) * 1996-03-14 2000-02-01 Mitsubishi Electric Corp Discharging lamp lighting device
US5636111A (en) 1996-03-26 1997-06-03 The Genlyte Group Incorporated Ballast shut-down circuit responsive to an unbalanced load condition in a single lamp ballast or in either lamp of a two-lamp ballast
US5619402A (en) 1996-04-16 1997-04-08 O2 Micro, Inc. Higher-efficiency cold-cathode fluorescent lamp power supply
US5825133A (en) 1996-09-25 1998-10-20 Rockwell International Resonant inverter for hot cathode fluorescent lamps
US5828156A (en) * 1996-10-23 1998-10-27 Branson Ultrasonics Corporation Ultrasonic apparatus
US5912812A (en) * 1996-12-19 1999-06-15 Lucent Technologies Inc. Boost power converter for powering a load from an AC source
TW408558B (en) * 1996-12-25 2000-10-11 Tec Corp Power supply device and discharge lamp lighting apparatusv
JPH10199687A (en) 1997-01-08 1998-07-31 Canon Inc Fluorescent lamp inverter device
US5882201A (en) * 1997-01-21 1999-03-16 Salem; George Dental debridement method and tool therefor
GB9701687D0 (en) * 1997-01-28 1997-03-19 Tunewell Technology Ltd Improvements in or relating to an a.c. current distribution system
US5930121A (en) * 1997-03-14 1999-07-27 Linfinity Microelectronics Direct drive backlight system
US5923129A (en) * 1997-03-14 1999-07-13 Linfinity Microelectronics Apparatus and method for starting a fluorescent lamp
US6441943B1 (en) 1997-04-02 2002-08-27 Gentex Corporation Indicators and illuminators using a semiconductor radiation emitter package
US6281636B1 (en) 1997-04-22 2001-08-28 Nippo Electric Co., Ltd. Neutral-point inverter
US5914842A (en) 1997-09-26 1999-06-22 Snc Manufacturing Co., Inc. Electromagnetic coupling device
US6188553B1 (en) 1997-10-10 2001-02-13 Electro-Mag International Ground fault protection circuit
US6020688A (en) * 1997-10-10 2000-02-01 Electro-Mag International, Inc. Converter/inverter full bridge ballast circuit
US6181066B1 (en) * 1997-12-02 2001-01-30 Power Circuit Innovations, Inc. Frequency modulated ballast with loosely coupled transformer for parallel gas discharge lamp control
US6072282A (en) 1997-12-02 2000-06-06 Power Circuit Innovations, Inc. Frequency controlled quick and soft start gas discharge lamp ballast and method therefor
JPH11233285A (en) 1998-02-18 1999-08-27 Aibis:Kk Light modulation control device
JP3832074B2 (en) * 1998-02-24 2006-10-11 松下電工株式会社 Discharge lamp lighting device
JP3559162B2 (en) 1998-04-21 2004-08-25 アルパイン株式会社 Driving method of backlight lamp
US6043609A (en) * 1998-05-06 2000-03-28 E-Lite Technologies, Inc. Control circuit and method for illuminating an electroluminescent panel
US5892336A (en) * 1998-05-26 1999-04-06 O2Micro Int Ltd Circuit for energizing cold-cathode fluorescent lamps
US6445141B1 (en) 1998-07-01 2002-09-03 Everbrite, Inc. Power supply for gas discharge lamp
JP4153592B2 (en) * 1998-07-09 2008-09-24 松下電工株式会社 Discharge lamp lighting device
US6181553B1 (en) * 1998-09-04 2001-01-30 International Business Machines Corporation Arrangement and method for transferring heat from a portable personal computer
US6181084B1 (en) * 1998-09-14 2001-01-30 Eg&G, Inc. Ballast circuit for high intensity discharge lamps
US6181083B1 (en) 1998-10-16 2001-01-30 Electro-Mag, International, Inc. Ballast circuit with controlled strike/restart
US6127786A (en) 1998-10-16 2000-10-03 Electro-Mag International, Inc. Ballast having a lamp end of life circuit
US6169375B1 (en) 1998-10-16 2001-01-02 Electro-Mag International, Inc. Lamp adaptable ballast circuit
US6037720A (en) 1998-10-23 2000-03-14 Philips Electronics North America Corporation Level shifter
US6150772A (en) 1998-11-25 2000-11-21 Pacific Aerospace & Electronics, Inc. Gas discharge lamp controller
US6114814A (en) 1998-12-11 2000-09-05 Monolithic Power Systems, Inc. Apparatus for controlling a discharge lamp in a backlighted display
US6900600B2 (en) 1998-12-11 2005-05-31 Monolithic Power Systems, Inc. Method for starting a discharge lamp using high energy initial pulse
US6137240A (en) 1998-12-31 2000-10-24 Lumion Corporation Universal ballast control circuit
US6108215A (en) 1999-01-22 2000-08-22 Dell Computer Corporation Voltage regulator with double synchronous bridge CCFL inverter
US6104146A (en) 1999-02-12 2000-08-15 Micro International Limited Balanced power supply circuit for multiple cold-cathode fluorescent lamps
FI990375A (en) * 1999-02-22 2000-12-07 Nokia Networks Oy Procedure for testing circuit board mounts and a circuit board
US6049177A (en) * 1999-03-01 2000-04-11 Fulham Co. Inc. Single fluorescent lamp ballast for simultaneous operation of different lamps in series or parallel
WO2000054558A1 (en) 1999-03-09 2000-09-14 Koninklijke Philips Electronics N.V. Circuit arrangement
US6198234B1 (en) * 1999-06-09 2001-03-06 Linfinity Microelectronics Dimmable backlight system
JP2001006888A (en) * 1999-06-21 2001-01-12 Koito Mfg Co Ltd Discharge lamp lighting circuit
US6259615B1 (en) 1999-07-22 2001-07-10 O2 Micro International Limited High-efficiency adaptive DC/AC converter
US6804129B2 (en) 1999-07-22 2004-10-12 02 Micro International Limited High-efficiency adaptive DC/AC converter
US6198236B1 (en) * 1999-07-23 2001-03-06 Linear Technology Corporation Methods and apparatus for controlling the intensity of a fluorescent lamp
US6320329B1 (en) 1999-07-30 2001-11-20 Philips Electronics North America Corporation Modular high frequency ballast architecture
US6218788B1 (en) 1999-08-20 2001-04-17 General Electric Company Floating IC driven dimming ballast
US20020030451A1 (en) * 2000-02-25 2002-03-14 Moisin Mihail S. Ballast circuit having voltage clamping circuit
US6472876B1 (en) 2000-05-05 2002-10-29 Tridonic-Usa, Inc. Sensing and balancing currents in a ballast dimming circuit
WO2001089271A1 (en) * 2000-05-12 2001-11-22 O2 Micro International Limited Integrated circuit for lamp heating and dimming control
WO2001090686A1 (en) * 2000-05-19 2001-11-29 Zygo Corporation In-situ mirror characterization
US6522558B2 (en) * 2000-06-13 2003-02-18 Linfinity Microelectronics Single mode buck/boost regulating charge pump
US6307765B1 (en) 2000-06-22 2001-10-23 Linfinity Microelectronics Method and apparatus for controlling minimum brightness of a fluorescent lamp
US6469454B1 (en) * 2000-06-27 2002-10-22 Maxim Integrated Products, Inc. Cold cathode fluorescent lamp controller
US6215256B1 (en) * 2000-07-07 2001-04-10 Ambit Microsystems Corporation High-efficient electronic stabilizer with single stage conversion
US6310444B1 (en) 2000-08-10 2001-10-30 Philips Electronics North America Corporation Multiple lamp LCD backlight driver with coupled magnetic components
US6459215B1 (en) 2000-08-11 2002-10-01 General Electric Company Integral lamp
US6494587B1 (en) 2000-08-24 2002-12-17 Rockwell Collins, Inc. Cold cathode backlight for avionics applications with strobe expanded dimming range
US7142082B2 (en) 2000-09-14 2006-11-28 Matsushita Electric Works, Ltd. Electromagnetic device and high-voltage generating device and method of producing electromagnetic device
US6433492B1 (en) 2000-09-18 2002-08-13 Northrop Grumman Corporation Magnetically shielded electrodeless light source
US6680834B2 (en) * 2000-10-04 2004-01-20 Honeywell International Inc. Apparatus and method for controlling LED arrays
JP2002175891A (en) * 2000-12-08 2002-06-21 Advanced Display Inc Multi-lamp type inverter for backlight
US6501234B2 (en) 2001-01-09 2002-12-31 02 Micro International Limited Sequential burst mode activation circuit
US6420839B1 (en) * 2001-01-19 2002-07-16 Ambit Microsystems Corp. Power supply system for multiple loads and driving system for multiple lamps
US6417631B1 (en) * 2001-02-07 2002-07-09 General Electric Company Integrated bridge inverter circuit for discharge lighting
TW478292B (en) * 2001-03-07 2002-03-01 Ambit Microsystems Corp Multi-lamp driving system
US6459216B1 (en) 2001-03-07 2002-10-01 Monolithic Power Systems, Inc. Multiple CCFL current balancing scheme for single controller topologies
US6509696B2 (en) * 2001-03-22 2003-01-21 Koninklijke Philips Electronics N.V. Method and system for driving a capacitively coupled fluorescent lamp
DE10115388A1 (en) * 2001-03-28 2002-10-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Control circuit for an LED array
KR100815890B1 (en) 2001-03-31 2008-03-24 엘지.필립스 엘시디 주식회사 Method Of Winding Coil and Transformer and Invertor for Liquid Crystal Display Using The Same
US6628093B2 (en) 2001-04-06 2003-09-30 Carlile R. Stevens Power inverter for driving alternating current loads
US6570344B2 (en) * 2001-05-07 2003-05-27 O2Micro International Limited Lamp grounding and leakage current detection system
JP2002367835A (en) * 2001-06-04 2002-12-20 Toko Inc Inverter transformer
US6515881B2 (en) * 2001-06-04 2003-02-04 O2Micro International Limited Inverter operably controlled to reduce electromagnetic interference
US6630797B2 (en) 2001-06-18 2003-10-07 Koninklijke Philips Electronics N.V. High efficiency driver apparatus for driving a cold cathode fluorescent lamp
TWI256860B (en) * 2001-06-29 2006-06-11 Hon Hai Prec Ind Co Ltd Multi-tube driving system
US6486618B1 (en) 2001-09-28 2002-11-26 Koninklijke Philips Electronics N.V. Adaptable inverter
US6559606B1 (en) * 2001-10-23 2003-05-06 O2Micro International Limited Lamp driving topology
JP2003133095A (en) * 2001-10-30 2003-05-09 Mitsubishi Electric Corp Discharge lamp lighting device
US6703796B2 (en) * 2001-11-09 2004-03-09 Ambit Microsystems Corp. Power supply and inverter used therefor
TW556860U (en) 2001-12-14 2003-10-01 Taiwan Power Conversion Inc Current equalizer back light plate
US6781326B2 (en) * 2001-12-17 2004-08-24 Q Technology Incorporated Ballast with lamp sensor and method therefor
US6936977B2 (en) * 2002-01-23 2005-08-30 Mihail S. Moisin Ballast circuit having enhanced output isolation transformer circuit with high power factor
US20030141829A1 (en) * 2002-01-31 2003-07-31 Shan-Ho Yu Current equalizer assembly for LCD backlight panel
US6930893B2 (en) 2002-01-31 2005-08-16 Vlt, Inc. Factorized power architecture with point of load sine amplitude converters
TW595263B (en) * 2002-04-12 2004-06-21 O2Micro Inc A circuit structure for driving cold cathode fluorescent lamp
US6969958B2 (en) * 2002-06-18 2005-11-29 Microsemi Corporation Square wave drive system
TWI277371B (en) * 2002-06-26 2007-03-21 Darfon Electronics Corp Inverter for driving multiple discharge lamps
JP3951176B2 (en) 2002-09-06 2007-08-01 ミネベア株式会社 Discharge lamp lighting device
JP2004335443A (en) * 2003-02-10 2004-11-25 Masakazu Ushijima Inverter circuit for discharge tube for multiple lamp lighting, and surface light source system
US6870330B2 (en) * 2003-03-26 2005-03-22 Microsemi Corporation Shorted lamp detection in backlight system
US6936975B2 (en) 2003-04-15 2005-08-30 02Micro International Limited Power supply for an LCD panel
TW200501829A (en) 2003-06-23 2005-01-01 Benq Corp Multi-lamp driving system
US7187139B2 (en) 2003-09-09 2007-03-06 Microsemi Corporation Split phase inverters for CCFL backlight system
ATE458382T1 (en) 2003-10-06 2010-03-15 Microsemi Corp POWER SHARING SCHEMATIC AND DEVICE FOR MULTIPLE CCF LAMP OPERATION
US7141933B2 (en) * 2003-10-21 2006-11-28 Microsemi Corporation Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel
TWM245517U (en) * 2003-10-30 2004-10-01 Quanta Comp Inc Computer device and its modular structure
TW200517014A (en) * 2003-11-10 2005-05-16 Kazuo Kohno Drive circuit for lighting fixture
US7183724B2 (en) * 2003-12-16 2007-02-27 Microsemi Corporation Inverter with two switching stages for driving lamp
US7250731B2 (en) 2004-04-07 2007-07-31 Microsemi Corporation Primary side current balancing scheme for multiple CCF lamp operation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574222A (en) * 1983-12-27 1986-03-04 General Electric Company Ballast circuit for multiple parallel negative impedance loads
US4663570A (en) * 1984-08-17 1987-05-05 Lutron Electronics Co., Inc. High frequency gas discharge lamp dimming ballast
US6765354B2 (en) * 2000-10-09 2004-07-20 Tridonicatco Gmbh & Co. Kg Circuitry arrangement for the operation of a plurality of gas discharge lamps
US6717371B2 (en) * 2001-07-23 2004-04-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Ballast for operating at least one low-pressure discharge lamp

Also Published As

Publication number Publication date
CN1887034A (en) 2006-12-27
EP1671521A4 (en) 2007-06-13
US20110181204A1 (en) 2011-07-28
JP4658061B2 (en) 2011-03-23
US20050093471A1 (en) 2005-05-05
EP1671521A2 (en) 2006-06-21
EP1671521B1 (en) 2010-02-17
US7560875B2 (en) 2009-07-14
TW200520626A (en) 2005-06-16
US20050093472A1 (en) 2005-05-05
US7242147B2 (en) 2007-07-10
US7294971B2 (en) 2007-11-13
KR101085579B1 (en) 2011-11-25
WO2005038828A2 (en) 2005-04-28
DE602004025593D1 (en) 2010-04-01
ES2340169T3 (en) 2010-05-31
CN1887034B (en) 2011-03-23
TWI276370B (en) 2007-03-11
JP2007507855A (en) 2007-03-29
US20090267521A1 (en) 2009-10-29
US7932683B2 (en) 2011-04-26
US20080061711A1 (en) 2008-03-13
ATE458382T1 (en) 2010-03-15
KR20070021988A (en) 2007-02-23
US8222836B2 (en) 2012-07-17

Similar Documents

Publication Publication Date Title
WO2005038828A3 (en) A current sharing scheme and device for multiple ccf lamp operation
TW200517014A (en) Drive circuit for lighting fixture
WO2005101920A3 (en) A primary side current balancing scheme for multiple ccf lamp operation
TW200701142A (en) Electrical circuit for use with light source, transformer circuit, lighting panel, and method to balance current flows
CN104519642B (en) Lighting device
EP2237645B1 (en) Current balancing apparatus, power supply apparatus, lighting apparatus, and current balancing method thereof
US7285921B2 (en) Electric current balancing device
US9000673B2 (en) Multi-channel two-stage controllable constant current source and illumination source
TW200703383A (en) Equalizing discharge lamp currents in circuits
US20120019156A1 (en) Led string driver with non-dissipative reactance balancer
TW200605731A (en) Fluorescent lamp driver and liquid crystal display apparatus
TW200610444A (en) Module of parallel lighting for electric discharge lamps, and balancer coil
TW200705502A (en) Balanced current lamp module and multi-lamp circuit
US7365502B2 (en) Device for driving light sources
TW200601903A (en) Discharge lamp lighting circuit
TW200601902A (en) Discharge lamp lighting circuit
TW200608552A (en) A fault protection scheme for CCFL integrated circuits
TW200623964A (en) An apparatus for driving cold-cathode fluorescent lamp
TW200709735A (en) Multi-lamp driving system
US20080116823A1 (en) Current-balancing apparatus for lamps
TW200741284A (en) Power supply for discharge lamp and the current balance device thereof
MX2010000381A (en) Improvements in or relating to gas discharge lamps.
TW200743410A (en) Balancing transforming circuit for cold cathode fluorescent lamps
US7944152B2 (en) Two-stage balancer for multi-lamp backlight
KR100738013B1 (en) Electric current balancing device

Legal Events

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

Ref document number: 200480034893.6

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006534250

Country of ref document: JP

Ref document number: 1020067006590

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2004794179

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2004794179

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1020067006590

Country of ref document: KR