GB2391726B - Improvements in and relating to electronic ballasts - Google Patents

Improvements in and relating to electronic ballasts

Info

Publication number
GB2391726B
GB2391726B GB0218225A GB0218225A GB2391726B GB 2391726 B GB2391726 B GB 2391726B GB 0218225 A GB0218225 A GB 0218225A GB 0218225 A GB0218225 A GB 0218225A GB 2391726 B GB2391726 B GB 2391726B
Authority
GB
United Kingdom
Prior art keywords
relating
electronic ballasts
ballasts
electronic
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.)
Expired - Fee Related
Application number
GB0218225A
Other versions
GB0218225D0 (en
GB2391726A (en
Inventor
Lawrence Samuel Tyson
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.)
Microlights Ltd
Original Assignee
Microlights 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 Microlights Ltd filed Critical Microlights Ltd
Priority to GB0218225A priority Critical patent/GB2391726B/en
Publication of GB0218225D0 publication Critical patent/GB0218225D0/en
Publication of GB2391726A publication Critical patent/GB2391726A/en
Application granted granted Critical
Publication of GB2391726B publication Critical patent/GB2391726B/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
    • H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2881—Load circuits; Control thereof
    • H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
    • H05B41/2883—Load circuits; Control thereof the control resulting from an action on the static converter the controlled element being a DC/AC converter in the final stage, e.g. by harmonic mode starting
    • 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
    • H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2881—Load circuits; Control thereof
    • 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
    • H05B41/382—Controlling the intensity of light during the transitional start-up phase
    • H05B41/388—Controlling the intensity of light during the transitional start-up phase for a transition from glow to arc

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
GB0218225A 2002-08-07 2002-08-07 Improvements in and relating to electronic ballasts Expired - Fee Related GB2391726B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0218225A GB2391726B (en) 2002-08-07 2002-08-07 Improvements in and relating to electronic ballasts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0218225A GB2391726B (en) 2002-08-07 2002-08-07 Improvements in and relating to electronic ballasts

Publications (3)

Publication Number Publication Date
GB0218225D0 GB0218225D0 (en) 2002-09-11
GB2391726A GB2391726A (en) 2004-02-11
GB2391726B true GB2391726B (en) 2005-07-27

Family

ID=9941813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0218225A Expired - Fee Related GB2391726B (en) 2002-08-07 2002-08-07 Improvements in and relating to electronic ballasts

Country Status (1)

Country Link
GB (1) GB2391726B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2397182B (en) * 2002-12-31 2006-05-31 David John Aarons Gas discharge lamp drive circuitry

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319677A (en) * 1996-11-19 1998-05-27 Micro Tech Ltd Discharge lamp starting and operating circuit
GB2338358A (en) * 1998-06-13 1999-12-15 Simsoarica Limited High intensity discharge lamp ballast
WO2000030413A1 (en) * 1998-11-18 2000-05-25 Microlights Limited Improvements to electronic ballasts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319677A (en) * 1996-11-19 1998-05-27 Micro Tech Ltd Discharge lamp starting and operating circuit
GB2338358A (en) * 1998-06-13 1999-12-15 Simsoarica Limited High intensity discharge lamp ballast
WO2000030413A1 (en) * 1998-11-18 2000-05-25 Microlights Limited Improvements to electronic ballasts

Also Published As

Publication number Publication date
GB0218225D0 (en) 2002-09-11
GB2391726A (en) 2004-02-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110807