GB8921325D0 - Electronic ballast circuits - Google Patents

Electronic ballast circuits

Info

Publication number
GB8921325D0
GB8921325D0 GB898921325A GB8921325A GB8921325D0 GB 8921325 D0 GB8921325 D0 GB 8921325D0 GB 898921325 A GB898921325 A GB 898921325A GB 8921325 A GB8921325 A GB 8921325A GB 8921325 D0 GB8921325 D0 GB 8921325D0
Authority
GB
United Kingdom
Prior art keywords
electronic ballast
ballast circuits
circuits
electronic
ballast
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.)
Withdrawn
Application number
GB898921325A
Other versions
GB2224170A (en
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.)
W J PARRY NOTTM Ltd
Original Assignee
W J PARRY NOTTM Ltd
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 W J PARRY NOTTM Ltd filed Critical W J PARRY NOTTM Ltd
Publication of GB8921325D0 publication Critical patent/GB8921325D0/en
Publication of GB2224170A publication Critical patent/GB2224170A/en
Withdrawn legal-status Critical Current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
    • H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
GB8921325A 1988-09-21 1989-09-21 Electronic ballast circuit for discharge lamps Withdrawn GB2224170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888822195A GB8822195D0 (en) 1988-09-21 1988-09-21 Improvements in/related to electronic ballast circuits

Publications (2)

Publication Number Publication Date
GB8921325D0 true GB8921325D0 (en) 1989-11-08
GB2224170A GB2224170A (en) 1990-04-25

Family

ID=10644010

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888822195A Pending GB8822195D0 (en) 1988-09-21 1988-09-21 Improvements in/related to electronic ballast circuits
GB8921325A Withdrawn GB2224170A (en) 1988-09-21 1989-09-21 Electronic ballast circuit for discharge lamps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888822195A Pending GB8822195D0 (en) 1988-09-21 1988-09-21 Improvements in/related to electronic ballast circuits

Country Status (1)

Country Link
GB (2) GB8822195D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112753283A (en) * 2018-07-26 2021-05-04 硅山有限公司 Filtering LED lamp device

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5068570A (en) * 1989-01-26 1991-11-26 Koito Manufacturing Co., Ltd. Lamp lighting circuit with an overload protection capability
JP2587718B2 (en) * 1990-10-01 1997-03-05 株式会社小糸製作所 Lighting circuit for vehicle discharge lamps
JPH0521182A (en) * 1990-12-30 1993-01-29 Toshiba Lighting & Technol Corp Discharge lamp lighting device and luminaire
JP3026681B2 (en) * 1992-06-30 2000-03-27 三洋電機株式会社 Fluorescent light control device
GB2269279A (en) * 1992-08-01 1994-02-02 Coolite Ltd Fluorescent Tube Starting and Operating Circuit
AU3575395A (en) * 1995-10-03 1997-04-28 Sandor Pal Improvements in or relating to an electronic ballast for fluorescent lamps
US5796215A (en) * 1996-01-29 1998-08-18 International Rectifier Corporation Soft start circuit for self-oscillating drivers
US6008590A (en) * 1996-05-03 1999-12-28 Philips Electronics North America Corporation Integrated circuit inverter control having a multi-function pin
SG68587A1 (en) * 1996-07-27 1999-11-16 Singapore Productivity And Sta An electronic ballast circuit
ATE220849T1 (en) * 1997-12-23 2002-08-15 Tridonicatco Gmbh & Co Kg ELECTRONIC BALLAST
US8659233B2 (en) * 2009-10-23 2014-02-25 General Electric Company Fluorescent lamp ballast with electronic preheat circuit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8005271L (en) * 1980-07-18 1981-06-22 Aos Metall Mek Verk KIT AND DEVICE FOR ELIMINATING UNCOMFORTABILITY WHEN VIEWING X-RAY X-RAY FILM
DE3266600D1 (en) * 1981-02-21 1985-11-07 Emi Plc Thorn Lamp driver circuits
US4464606A (en) * 1981-03-25 1984-08-07 Armstrong World Industries, Inc. Pulse width modulated dimming arrangement for fluorescent lamps
NL8102364A (en) * 1981-05-14 1982-12-01 Philips Nv ELECTRICAL DEVICE FOR IGNITING AND POWERING ONE OF TWO PREHEATABLE ELECTRODES GAS AND / OR VAPOR DISCHARGE LAMP.
GB2117192B (en) * 1982-02-26 1986-01-02 Transtar Limited Lamp control circuit
US4686428A (en) * 1985-08-28 1987-08-11 Innovative Controls, Incorporated High intensity discharge lamp self-adjusting ballast system with current limiters and a current feedback loop
US4717863A (en) * 1986-02-18 1988-01-05 Zeiler Kenneth T Frequency modulation ballast circuit
US4751398A (en) * 1986-03-18 1988-06-14 The Bodine Company Lighting system for normal and emergency operation of high intensity discharge lamps
US4704563A (en) * 1986-05-09 1987-11-03 General Electric Company Fluorescent lamp operating circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112753283A (en) * 2018-07-26 2021-05-04 硅山有限公司 Filtering LED lamp device
CN112753283B (en) * 2018-07-26 2024-02-27 硅山有限公司 LED lamp

Also Published As

Publication number Publication date
GB8822195D0 (en) 1988-10-26
GB2224170A (en) 1990-04-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)