EP2104402A1 - Elektronisches Vorschaltgerät für Gasentladungslampen - Google Patents

Elektronisches Vorschaltgerät für Gasentladungslampen Download PDF

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Publication number
EP2104402A1
EP2104402A1 EP08004962A EP08004962A EP2104402A1 EP 2104402 A1 EP2104402 A1 EP 2104402A1 EP 08004962 A EP08004962 A EP 08004962A EP 08004962 A EP08004962 A EP 08004962A EP 2104402 A1 EP2104402 A1 EP 2104402A1
Authority
EP
European Patent Office
Prior art keywords
filament
unit
circuit
lamp
capacity
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Withdrawn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
EP08004962A
Other languages
English (en)
French (fr)
Inventor
Chao-Chin Yeh
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.)
Chuan Shih Industrial Co Ldt
Original Assignee
Chuan Shih Industrial Co Ldt
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 Chuan Shih Industrial Co Ldt filed Critical Chuan Shih Industrial Co Ldt
Priority to EP08004962A priority Critical patent/EP2104402A1/de
Publication of EP2104402A1 publication Critical patent/EP2104402A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation

Definitions

  • the present invention relates to a gas discharge fluorescence lamp, and more particularly to a electric discharge light regulation matching circuit that operates with filaments.
  • a conventional light-regulation type gas discharge fluorescent lamp or a conventional light-regulation type electronic ballast for fluorescent lamps utilizes IC chips and conventional standard light regulator having electric control switch, such as TRIAC, for light regulation.
  • electric control switch such as TRIAC
  • the gas discharge fluorescent lamp includes a lamp tube and a plastic case, in which the lamp tube is received.
  • the primary objective of the present invention is to provide an electronic circuit that matches hot cathode fluorescent lamps to prevent the flicker problem of the electric control switch connecting light regulation lamp.
  • the circuit includes an end of a filament connecting an end of a charge capacity to heat the filament directly.
  • the circuit further has functions of reusing power and preventing temperature rising.
  • the secondary objective of the present invention is to provide a matching circuit for light regulation of a gas discharge fluorescent lamp, which may prevent the temperature rising in the plastic case.
  • a electric discharge light regulation matching circuit that operates with filaments includes a resonance unit, a converter unit, a charge circuit, a half-bridge output unit and a lamp.
  • the resonance unit includes a first capacity and a second capacity in series connection, and including a first inductance in parallel connection with the first capacity and in series connection with the second capacity.
  • the converter unit is connected to the resonance unit to convert an AC current to a DC current.
  • the charge circuit includes at least a charge capacity connected to the converter unit.
  • the half-bridge output unit includes two electric control switches in series connection, each of which has a control terminal connected to an oscillation unit respectively.
  • the lamp which is connected to the charge circuit, includes a first filament and a second filament therein, wherein the first filament has an end connected to the charge capacity to heat the first filament directly that may prevent a flicker problem of the lamp connecting the electric control switch and may provide functions of recycling power and preventing temperature rising.
  • a matching circuit 10 for light regulation of a hot cathode gas discharge fluorescent lamp which may match a standard light regulator to perform the function of light regulation.
  • the matching circuit 10 includes a resonance unit 11, a converter unit 21, a charge circuit 31, a half-bridge output unit 41, and a lamp 51.
  • the resonance unit 11 includes a first capacity C1 and a second capacity C2 in series connection, and includes a first inductance L1 in parallel connection with the first capacity C1 and in series connection with the second capacity C2.
  • the converter unit 21 is connected to the resonance unit 11 to convert an AC current to a DC current.
  • the converter unit 21 is a bridge rectifier.
  • the charge circuit 31 includes a charge capacity Cc connected to the converter unit 21.
  • the half-bridge output unit 41 includes two electric control switches Q1, Q2 in series connection and connected to the charge circuit 31.
  • Each of the electric control switches Q1, Q2 has a control terminal G, and each of the control terminals G is connected to an oscillation unit 45.
  • the electric control switches Q1, Q2 are transistors
  • the oscillation units 45 are RL oscillating circuits including a resistor R and an inductance L in series connection.
  • a voltage feedback unit 46 which is connected to the charge circuit 31, includes a second inductance L2 and three capacities C3, C4, and C5.
  • the lamp 51 which is connected to the charge circuit 31, has two filaments 52, 53 therein, wherein an end of the first filament 52 is connected to an end of the charge capacity Cc, therefore, the first filament 31 works as a damping resistor of the charge circuit 31.
  • An end of the second filament 53 is connected to the voltage feedback unit 46.
  • the lamp 51 is a gas discharge fluorescent lamp having a plastic case (not shown).
  • the matching circuit 10 of the present invention is provided in the plastic case, and the lamp 51 is left out of the plastic case.
  • the plastic case of the gas discharge fluorescent lamp is a conventional element, so we do not describe the detail here.
  • the power go through the resonance unit 11, the converter unit 21, the charge circuit 31 and the half-bridge output unit 41 to charge the charge capacity Cc and to light the lamp 51.
  • the input power is dropping gradually and generates a "ringing" effect that causes a great ringing wave.
  • the first filament 52 works as the damping resistor to reduce the ringing wave.
  • the heat generated by the ringing wave acting on the first filament 52 may heat the filament 52 itself for heat recycling.
  • the filament which may replace the damping resistor, may prevent the damping resistor heating in the plastic case that the temperature in the plastic case may be kept in a normal condition.

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  • Circuit Arrangements For Discharge Lamps (AREA)
EP08004962A 2008-03-17 2008-03-17 Elektronisches Vorschaltgerät für Gasentladungslampen Withdrawn EP2104402A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08004962A EP2104402A1 (de) 2008-03-17 2008-03-17 Elektronisches Vorschaltgerät für Gasentladungslampen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08004962A EP2104402A1 (de) 2008-03-17 2008-03-17 Elektronisches Vorschaltgerät für Gasentladungslampen

Publications (1)

Publication Number Publication Date
EP2104402A1 true EP2104402A1 (de) 2009-09-23

Family

ID=39769504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08004962A Withdrawn EP2104402A1 (de) 2008-03-17 2008-03-17 Elektronisches Vorschaltgerät für Gasentladungslampen

Country Status (1)

Country Link
EP (1) EP2104402A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395776A1 (de) * 1989-05-02 1990-11-07 Siemens Aktiengesellschaft Elektronisches Vorschaltgerät
WO1992004808A1 (en) * 1990-08-31 1992-03-19 Siew Ean Wong Improvements in electronic ballasts
DE4410492A1 (de) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
US6255785B1 (en) * 1999-10-25 2001-07-03 Changgen Yang High power factor electronic ballast with low lamp current peak ratio
EP1345311A2 (de) * 2002-03-15 2003-09-17 VLM S.p.A. Entladungslampenreaktanz mit hohem Leistungsfaktor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395776A1 (de) * 1989-05-02 1990-11-07 Siemens Aktiengesellschaft Elektronisches Vorschaltgerät
WO1992004808A1 (en) * 1990-08-31 1992-03-19 Siew Ean Wong Improvements in electronic ballasts
DE4410492A1 (de) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen
US6255785B1 (en) * 1999-10-25 2001-07-03 Changgen Yang High power factor electronic ballast with low lamp current peak ratio
EP1345311A2 (de) * 2002-03-15 2003-09-17 VLM S.p.A. Entladungslampenreaktanz mit hohem Leistungsfaktor

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