GB2256099A - Improvements in electronic ballasts - Google Patents

Improvements in electronic ballasts

Info

Publication number
GB2256099A
GB2256099A GB9209421A GB9209421A GB2256099A GB 2256099 A GB2256099 A GB 2256099A GB 9209421 A GB9209421 A GB 9209421A GB 9209421 A GB9209421 A GB 9209421A GB 2256099 A GB2256099 A GB 2256099A
Authority
GB
United Kingdom
Prior art keywords
fluorescent lamp
switching diode
smoothing capacitor
electronic ballasts
voltage
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
GB9209421A
Other versions
GB2256099B (en
GB9209421D0 (en
Inventor
Siew Ean Wong
Thien Siung Yang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9209421D0 publication Critical patent/GB9209421D0/en
Publication of GB2256099A publication Critical patent/GB2256099A/en
Application granted granted Critical
Publication of GB2256099B publication Critical patent/GB2256099B/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
    • H05B41/26—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
    • 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

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A ballast circuit for a compact fluorescent lamp in which the power factor is increased by the insertion of a high speed switching diode (D2) after the bridge rectifier (D1) but before the smoothing capacitors (C5, C6). The switching diode operates to prevent the current used by the fluorescent lamp being entirely supplied by the smoothing capacitor(s) during those portions of the half cycle when the supply voltage is lower than the DC voltage on the smoothing capacitor(s).
GB9209421A 1990-08-31 1992-04-30 Improvements in electronic ballasts Expired - Fee Related GB2256099B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK208490 1990-08-31
PCT/AU1991/000402 WO1992004808A1 (en) 1990-08-31 1991-08-29 Improvements in electronic ballasts

Publications (3)

Publication Number Publication Date
GB9209421D0 GB9209421D0 (en) 1992-06-24
GB2256099A true GB2256099A (en) 1992-11-25
GB2256099B GB2256099B (en) 1994-10-19

Family

ID=3774930

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9209421A Expired - Fee Related GB2256099B (en) 1990-08-31 1992-04-30 Improvements in electronic ballasts

Country Status (2)

Country Link
GB (1) GB2256099B (en)
WO (1) WO1992004808A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599405B1 (en) * 1992-11-26 1998-02-11 Koninklijke Philips Electronics N.V. Low harmonic power supply for a discharge lamp
EP0606665B1 (en) * 1993-01-12 1997-08-20 Koninklijke Philips Electronics N.V. Circuit arrangement
ES2108201T3 (en) * 1993-01-12 1997-12-16 Philips Electronics Nv BALLAST CIRCUIT.
CN1050493C (en) * 1993-01-16 2000-03-15 浙江照明电器总公司 High power factor electronic lamp with protector for abnormal condition
US5410221A (en) * 1993-04-23 1995-04-25 Philips Electronics North America Corporation Lamp ballast with frequency modulated lamp frequency
SG48019A1 (en) * 1993-04-23 1998-04-17 Koninkl Philips Electronics Nv Power factor correcting circuit
US5404082A (en) * 1993-04-23 1995-04-04 North American Philips Corporation High frequency inverter with power-line-controlled frequency modulation
DE4410492A1 (en) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Circuit arrangement for operating low-pressure discharge lamps
US5608295A (en) * 1994-09-02 1997-03-04 Valmont Industries, Inc. Cost effective high performance circuit for driving a gas discharge lamp load
EP2104402A1 (en) * 2008-03-17 2009-09-23 Chuan Shih Industrial Co., Ldt. Electronic ballast for fluorescent lamps
CN106664770B (en) 2014-03-24 2019-11-29 雷迪半导体有限公司 Converter circuitry of power and its method for converting AC power source
CN111817583B (en) 2017-01-26 2023-12-26 红色半导体公司 power converter circuit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2390068A1 (en) * 1977-05-04 1978-12-01 Gte Sylvania Inc
AU1522383A (en) * 1982-06-01 1983-12-08 Merlin Gerin S.A. (Proprietary) Limited Reduction of harmonics in gas discharge lamp ballasts
DE3308407A1 (en) * 1982-09-14 1984-03-22 Matsushita Electric Works Ltd POWER ADAPTER
AU2708684A (en) * 1983-05-05 1984-11-08 Dubank Electronics Pty. Ltd. Electronic ballast and starter
EP0205287A2 (en) * 1985-06-04 1986-12-17 Thorn Emi Lighting (Nz) Limited Improvements in or relating to switched mode power supplies
JPH01252175A (en) * 1988-03-31 1989-10-06 Toshiba Lighting & Technol Corp Inverter device
AU5076790A (en) * 1989-03-07 1990-09-20 Thorn Emi Plc Switched-mode regulator circuit
WO1991002400A1 (en) * 1989-08-04 1991-02-21 Courier De Mere Henri Edouard Feeding device for converters, free of harmonic distortion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841227A1 (en) * 1988-12-07 1990-06-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh CIRCUIT ARRANGEMENT FOR OPERATING A LOW-PRESSURE DISCHARGE LAMP
ATE102428T1 (en) * 1989-05-02 1994-03-15 Siemens Ag ELECTRONIC BALLAST.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2390068A1 (en) * 1977-05-04 1978-12-01 Gte Sylvania Inc
AU1522383A (en) * 1982-06-01 1983-12-08 Merlin Gerin S.A. (Proprietary) Limited Reduction of harmonics in gas discharge lamp ballasts
DE3308407A1 (en) * 1982-09-14 1984-03-22 Matsushita Electric Works Ltd POWER ADAPTER
AU2708684A (en) * 1983-05-05 1984-11-08 Dubank Electronics Pty. Ltd. Electronic ballast and starter
EP0205287A2 (en) * 1985-06-04 1986-12-17 Thorn Emi Lighting (Nz) Limited Improvements in or relating to switched mode power supplies
JPH01252175A (en) * 1988-03-31 1989-10-06 Toshiba Lighting & Technol Corp Inverter device
AU5076790A (en) * 1989-03-07 1990-09-20 Thorn Emi Plc Switched-mode regulator circuit
WO1991002400A1 (en) * 1989-08-04 1991-02-21 Courier De Mere Henri Edouard Feeding device for converters, free of harmonic distortion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstacts of Japan, E-869, p.59, & JP-A-01 252175(Toshiba), 6 Oct 1989 *

Also Published As

Publication number Publication date
GB2256099B (en) 1994-10-19
GB9209421D0 (en) 1992-06-24
WO1992004808A1 (en) 1992-03-19

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970829