CA2346782A1 - Apparatus for dimming a fluorescent lamp with a magnetic ballast - Google Patents

Apparatus for dimming a fluorescent lamp with a magnetic ballast Download PDF

Info

Publication number
CA2346782A1
CA2346782A1 CA002346782A CA2346782A CA2346782A1 CA 2346782 A1 CA2346782 A1 CA 2346782A1 CA 002346782 A CA002346782 A CA 002346782A CA 2346782 A CA2346782 A CA 2346782A CA 2346782 A1 CA2346782 A1 CA 2346782A1
Authority
CA
Canada
Prior art keywords
current
fluorescent lamp
line voltage
controlled dimmer
pwm
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.)
Granted
Application number
CA002346782A
Other languages
French (fr)
Other versions
CA2346782C (en
Inventor
Barna Szabados
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.)
1263357 Ontario Inc
Original Assignee
1263357 Ontario Inc.
Barna Szabados
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 1263357 Ontario Inc., Barna Szabados filed Critical 1263357 Ontario Inc.
Publication of CA2346782A1 publication Critical patent/CA2346782A1/en
Application granted granted Critical
Publication of CA2346782C publication Critical patent/CA2346782C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Abstract

A current controlled dimmer for controlling the output intensity of a fluorescent lamp with a magnetic ballast. The current controlled dimmer generates an AC current which follows the shape of the AC line voltage for the fluorescent lamp. The light intensity output of the fluorescent lamp is controlled by varying the amplitude of the AC current.
The AC current is generated using a pulse width modulator (PWM) to modulate the AC line voltage. The current controlled dimmer (10) utilizes a feedback control loop which applies proportional and integral (PI) control to the PWM modulation. In another embodiment of the current controlled dimmer, the AC current is generated by rectifying the AC line voltage and modulating the rectified voltage by a pulse width modulator (PWM) into positive and negative cycles to generate a 60 Hz AC current signal.
CA002346782A 1998-10-16 1999-10-15 Apparatus for dimming a fluorescent lamp with a magnetic ballast Expired - Fee Related CA2346782C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/173,067 US6121734A (en) 1998-10-16 1998-10-16 Apparatus for dimming a fluorescent lamp with a magnetic ballast
US09/173,067 1998-10-16
PCT/CA1999/000964 WO2000024232A1 (en) 1998-10-16 1999-10-15 Apparatus for dimming a fluorescent lamp with a magnetic ballast

Publications (2)

Publication Number Publication Date
CA2346782A1 true CA2346782A1 (en) 2000-04-27
CA2346782C CA2346782C (en) 2004-04-27

Family

ID=22630395

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002346782A Expired - Fee Related CA2346782C (en) 1998-10-16 1999-10-15 Apparatus for dimming a fluorescent lamp with a magnetic ballast

Country Status (7)

Country Link
US (1) US6121734A (en)
EP (1) EP1120022B1 (en)
AT (1) ATE247374T1 (en)
AU (1) AU6184999A (en)
CA (1) CA2346782C (en)
DE (1) DE69910415T2 (en)
WO (1) WO2000024232A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6538395B2 (en) * 1999-10-15 2003-03-25 1263357 Ontario Inc. Apparatus for dimming a fluorescent lamp with a magnetic ballast
US6407515B1 (en) * 1999-11-12 2002-06-18 Lighting Control, Inc. Power regulator employing a sinusoidal reference
US6472876B1 (en) * 2000-05-05 2002-10-29 Tridonic-Usa, Inc. Sensing and balancing currents in a ballast dimming circuit
DE60115292T2 (en) 2001-01-22 2006-08-10 Koninklijke Philips Electronics N.V. BALLASTERUNG AND METHOD FOR SUPPLYING A FLUORESCENT LAMP
US6573664B2 (en) * 2001-05-31 2003-06-03 Koninklijke Philips Electronics N.V. High efficiency high power factor electronic ballast
US7141938B2 (en) * 2001-05-31 2006-11-28 Koninklijke Philips Electronics N.V. Power control device, apparatus and method of controlling the power supplied to a discharge lamp
ITRM20020124A1 (en) * 2002-03-06 2003-09-08 Sisti Lighting S P A De ELECTRONIC DEVICE FOR ADJUSTING THE POWER SUPPLY APPLIED TO A LOAD, OR DIMMER.
US7042170B2 (en) * 2003-05-31 2006-05-09 Lights Of America, Inc. Digital ballast
JP2005011634A (en) * 2003-06-18 2005-01-13 Nec Mitsubishi Denki Visual Systems Kk Backlight system
GB2405540B (en) * 2003-08-27 2006-05-10 Ron Shu-Yuen Hui Apparatus and method for providing dimming control of lamps and electrical lighting systems
US6969955B2 (en) * 2004-01-29 2005-11-29 Axis Technologies, Inc. Method and apparatus for dimming control of electronic ballasts
KR100993673B1 (en) * 2004-06-28 2010-11-10 엘지디스플레이 주식회사 Apparatusfor and method of driving lamp of liquid crystal display device
GB2418786B (en) * 2004-10-01 2006-11-29 Energy Doubletree Ltd E Dimmable lighting system
US8390211B2 (en) * 2005-10-17 2013-03-05 Abl Ip Holding Llc Constant lumen output control system
US7372213B2 (en) * 2005-10-19 2008-05-13 O2Micro International Limited Lamp current balancing topologies
JP2007234522A (en) * 2006-03-03 2007-09-13 Minebea 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
US7477025B2 (en) * 2007-04-23 2009-01-13 Fsp Technology Inc. Power control circuit for adjusting light
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
US8350494B2 (en) * 2009-02-09 2013-01-08 GV Controls, LLC Fluorescent lamp dimming controller apparatus and system
EP2497341B1 (en) 2009-11-02 2018-09-12 Genesys Global LLC Electronic ballast circuit for lamps
KR101993379B1 (en) * 2012-09-11 2019-06-26 삼성전자주식회사 Method and Apparatus for controlling output voltage of inverter driving motor
DK3294043T3 (en) * 2016-09-13 2019-05-06 Xylem Europe Gmbh Control algorithm for an electronic dimming ballast of a UV lamp
CN111954341B (en) * 2020-09-03 2022-12-09 广州彩熠灯光股份有限公司 Double-frequency control device and method and LED stage lamp

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DE3044406A1 (en) * 1979-12-04 1981-08-27 Zumtobel AG, 6850 Dornbirn CIRCUIT ARRANGEMENT FOR OPERATION OR FOR CONTROLLING THE POWER ATTENDED FROM A SUPPLY NETWORK AT LEAST ONE CONSUMER
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Also Published As

Publication number Publication date
EP1120022B1 (en) 2003-08-13
DE69910415D1 (en) 2003-09-18
EP1120022A1 (en) 2001-08-01
US6121734A (en) 2000-09-19
AU6184999A (en) 2000-05-08
CA2346782C (en) 2004-04-27
DE69910415T2 (en) 2004-06-24
WO2000024232A1 (en) 2000-04-27
ATE247374T1 (en) 2003-08-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20161017