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EP2453532A3 - Fluorescent tube converter and protection circuit - Google Patents

Fluorescent tube converter and protection circuit Download PDF

Info

Publication number
EP2453532A3
EP2453532A3 EP11187367A EP11187367A EP2453532A3 EP 2453532 A3 EP2453532 A3 EP 2453532A3 EP 11187367 A EP11187367 A EP 11187367A EP 11187367 A EP11187367 A EP 11187367A EP 2453532 A3 EP2453532 A3 EP 2453532A3
Authority
EP
European Patent Office
Prior art keywords
cap
current
fluorescent tube
molded
electrical contact
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Withdrawn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
EP11187367A
Other languages
German (de)
French (fr)
Other versions
EP2453532A2 (en
Inventor
Ka Tong Lo
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.)
Empress International Ltd
Original Assignee
Empress International 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 Empress International Ltd filed Critical Empress International Ltd
Publication of EP2453532A2 publication Critical patent/EP2453532A2/en
Publication of EP2453532A3 publication Critical patent/EP2453532A3/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Withdrawn legal-status Critical Current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
    • H05B41/26—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
    • 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
    • H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

To permit direct adaptation of a pre-existing light fittings supporting T8 or T12 technologies into a T5 compliant arrangement, a current limiting and control circuit is inserted across electrical terminals (502, 515) in a T5 end-cap adaptor (10). Current limiting devices (PTC1, PTC2), such as a positive temperature coefficient (PTC) thermistor, restrict current flow under conditions where current passed through the electrical terminals exceeds a maximum input current of an electronic ballast (510), such as a T5 fluorescent tube (406). To further accommodate physical sizing of a molded T5 end-cap adaptor (10) and to produce an increase in creepage distance, electrical contact pins (22) extending rearwardly from end-cap adaptor (10) are separated from a peripheral edge of the molded end-cap by an isolating channel (26) formed generally about outermost edges of each electrical contact pin (22).
EP11187367A 2010-11-15 2011-11-01 Fluorescent tube converter and protection circuit Withdrawn EP2453532A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201019265A GB201019265D0 (en) 2010-11-15 2010-11-15 Fluorescent tube converter and protection circuit

Publications (2)

Publication Number Publication Date
EP2453532A2 EP2453532A2 (en) 2012-05-16
EP2453532A3 true EP2453532A3 (en) 2012-09-05

Family

ID=43431443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11187367A Withdrawn EP2453532A3 (en) 2010-11-15 2011-11-01 Fluorescent tube converter and protection circuit

Country Status (2)

Country Link
EP (1) EP2453532A3 (en)
GB (1) GB201019265D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104902628A (en) * 2015-05-20 2015-09-09 苏州雄达顺新节能科技有限公司 LED energy-saving street lamp ballast
USD803784S1 (en) 2016-02-19 2017-11-28 Dinesh Wadhwani Electric lamp socket pin
CN108650727A (en) * 2018-03-23 2018-10-12 深圳市电明科技股份有限公司 A kind of LED light device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5744912A (en) * 1996-06-26 1998-04-28 So; Gin Pang Electronic ballast having an oscillator shutdown circuit for single or multiple fluorescent tubes for lamps
CN2899382Y (en) * 2006-04-28 2007-05-09 上海大学 Split socket type electronic inductance ballast
GB2434041A (en) * 2006-01-06 2007-07-11 Erg Ltd Adapter set for fluorescent tubes
GB2453113A (en) * 2007-09-25 2009-04-01 Ronald Deakin Fluorescent tube adaptor
GB2454500A (en) * 2007-11-09 2009-05-13 Ronald Deakin Adaptor for fluorescent tubes having an independent power input

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7747881B2 (en) 2006-08-14 2010-06-29 Globalfoundries Inc. System and method for limiting processor performance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5744912A (en) * 1996-06-26 1998-04-28 So; Gin Pang Electronic ballast having an oscillator shutdown circuit for single or multiple fluorescent tubes for lamps
GB2434041A (en) * 2006-01-06 2007-07-11 Erg Ltd Adapter set for fluorescent tubes
CN2899382Y (en) * 2006-04-28 2007-05-09 上海大学 Split socket type electronic inductance ballast
GB2453113A (en) * 2007-09-25 2009-04-01 Ronald Deakin Fluorescent tube adaptor
GB2454500A (en) * 2007-11-09 2009-05-13 Ronald Deakin Adaptor for fluorescent tubes having an independent power input

Also Published As

Publication number Publication date
EP2453532A2 (en) 2012-05-16
GB201019265D0 (en) 2010-12-29

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Legal Events

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RIC1 Information provided on ipc code assigned before grant

Ipc: H05B 41/285 20060101ALI20120731BHEP

Ipc: H01R 33/94 20060101AFI20120731BHEP

Ipc: E04C 3/17 20060101ALI20120731BHEP

STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 20130306