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CA2032057A1 - Circuit and method for improved dimming of gas discharge lamps - Google Patents

Circuit and method for improved dimming of gas discharge lamps

Info

Publication number
CA2032057A1
CA2032057A1 CA002032057A CA2032057A CA2032057A1 CA 2032057 A1 CA2032057 A1 CA 2032057A1 CA 002032057 A CA002032057 A CA 002032057A CA 2032057 A CA2032057 A CA 2032057A CA 2032057 A1 CA2032057 A1 CA 2032057A1
Authority
CA
Canada
Prior art keywords
circuit
gas discharge
discharge lamps
lamp
providing
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
CA002032057A
Other languages
French (fr)
Other versions
CA2032057C (en
Inventor
Charles R. Sullivan
Joel S. Spira
David G. Luchaco
Scott R. Jurell
Eric R. Motto
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.)
Lutron Electronics Co Inc
Original Assignee
Lutron Electronics Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24208510&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2032057(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/553,201 external-priority patent/US5041763A/en
Application filed by Lutron Electronics Co Inc filed Critical Lutron Electronics Co Inc
Publication of CA2032057A1 publication Critical patent/CA2032057A1/en
Application granted granted Critical
Publication of CA2032057C publication Critical patent/CA2032057C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2858—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A control system for providing electrical power from a source to at least one gas discharge lamp comprises a circuit for providing to the lamp an ac component of current at a first frequency and a circuit for simulta-neously providing to the lamp an ac component of current at a second, and substantially lower, frequency. There is established a composite current waveform in the lamp which substantially eliminates the occurrence of visible stria-tions.
CA002032057A 1990-07-13 1990-12-12 Circuit and method for improved dimming of gas discharge lamps Expired - Lifetime CA2032057C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US553,201 1990-07-13
US07/553,201 US5041763A (en) 1989-12-22 1990-07-13 Circuit and method for improved dimming of gas discharge lamps

Publications (2)

Publication Number Publication Date
CA2032057A1 true CA2032057A1 (en) 1992-01-14
CA2032057C CA2032057C (en) 2001-04-17

Family

ID=24208510

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002032057A Expired - Lifetime CA2032057C (en) 1990-07-13 1990-12-12 Circuit and method for improved dimming of gas discharge lamps

Country Status (4)

Country Link
JP (1) JP2727476B2 (en)
CA (1) CA2032057C (en)
DE (1) DE4039498B4 (en)
GB (1) GB2246034B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269279A (en) * 1992-08-01 1994-02-02 Coolite Ltd Fluorescent Tube Starting and Operating Circuit
JP3543236B2 (en) * 1995-03-06 2004-07-14 株式会社キジマ Push-pull inverter
EP0765107B1 (en) * 1995-09-25 2001-12-19 Koninklijke Philips Electronics N.V. circuit arrangement for avoiding striations
TW381409B (en) * 1996-03-14 2000-02-01 Mitsubishi Electric Corp Discharging lamp lighting device
FI101188B1 (en) * 1997-01-03 1998-04-30 Helvar Oy Electronic connector for discharge lamp provided with lamp power measurement by means of DC signal
GB0330019D0 (en) * 2003-12-24 2004-01-28 Powell David J Apparatus and method for controlling discharge lights
JP2010218963A (en) 2009-03-18 2010-09-30 Panasonic Electric Works Co Ltd Low-pressure discharge lamp lighting device and lighting apparatus using the same
US8167676B2 (en) 2009-06-19 2012-05-01 Vaxo Technologies, Llc Fluorescent lighting system
DE102010063867A1 (en) * 2010-12-22 2012-06-28 Tridonic Gmbh & Co Kg Ignition control and ignition detection of gas discharge lamps

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543136A (en) * 1940-11-19 1942-02-11 Smith & Sons Ltd S Improvements in electric lighting apparatus
GB1202505A (en) * 1968-03-01 1970-08-19 Matsushita Electronics Corp Fluorescent lamp device
GB1568310A (en) * 1976-12-13 1980-05-29 Kuroi Kosan Kk Discharge lamp lighting devices
US4158793A (en) * 1977-07-11 1979-06-19 Lewis Gary D Gas discharge lamp control circuit
FR2416617A1 (en) * 1978-02-07 1979-08-31 Signaux Entr Electriques CONVERTER FOR THE POWER SUPPLY OF DISCHARGE LAMPS, AND MORE GENERALLY OF ARC LAMPS, AND ITS APPLICATION TO PROJECTORS FOR SUCH LAMPS
US4415839A (en) * 1981-11-23 1983-11-15 Lesea Ronald A Electronic ballast for gaseous discharge lamps
FI65524C (en) * 1982-04-21 1984-05-10 Helvar Oy FOER REFRIGERATION FOER MATNING AVERAGE REQUIREMENTS FOR FLUORESCENT LAMPS
US4535399A (en) * 1983-06-03 1985-08-13 National Semiconductor Corporation Regulated switched power circuit with resonant load
JP2625793B2 (en) * 1987-12-28 1997-07-02 松下電器産業株式会社 Fluorescent lighting device
NL8800288A (en) * 1988-02-08 1989-09-01 Nedap Nv BALLAST FOR A FLUORESCENT LAMP.
US4916362A (en) * 1988-04-05 1990-04-10 Neon Dynamics Corporation Excitation supply for gas discharge tubes
US5144205A (en) * 1989-05-18 1992-09-01 Lutron Electronics Co., Inc. Compact fluorescent lamp dimming system
US5001386B1 (en) * 1989-12-22 1996-10-15 Lutron Electronics Co Circuit for dimming gas discharge lamps without introducing striations

Also Published As

Publication number Publication date
DE4039498B4 (en) 2006-06-29
GB2246034A (en) 1992-01-15
JP2727476B2 (en) 1998-03-11
GB9026931D0 (en) 1991-01-30
GB2246034B (en) 1994-12-14
JPH06302393A (en) 1994-10-28
DE4039498A1 (en) 1992-01-16
CA2032057C (en) 2001-04-17

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry