EP2595458A1 - Fluoreszenzlampe - Google Patents

Fluoreszenzlampe Download PDF

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Publication number
EP2595458A1
EP2595458A1 EP11189419.2A EP11189419A EP2595458A1 EP 2595458 A1 EP2595458 A1 EP 2595458A1 EP 11189419 A EP11189419 A EP 11189419A EP 2595458 A1 EP2595458 A1 EP 2595458A1
Authority
EP
European Patent Office
Prior art keywords
lamp
circuit
fluorescent tube
connections
power supply
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Withdrawn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
EP11189419.2A
Other languages
English (en)
French (fr)
Inventor
Hui Zhu
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.)
Dahwa International Ltd
Original Assignee
Dahwa 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 Dahwa International Ltd filed Critical Dahwa International Ltd
Priority to EP11189419.2A priority Critical patent/EP2595458A1/de
Priority to PCT/EP2012/062151 priority patent/WO2013072079A1/en
Publication of EP2595458A1 publication Critical patent/EP2595458A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • H05B41/02—Details
    • 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
    • H05B41/282—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

Definitions

  • the present invention relates to a lamp.
  • such lamps generally comprise a fluorescent tube, being tubular in shape and containing gas.
  • Such lamps are provided with internal electrodes, or filaments, of a starter device, and of a reactor, more commonly known as a ballast, which is conveniently connected to the mains electricity supply.
  • the ballast is used, in conventional fluorescent lamps, to regulate the flow of current that arrives at the electrodes of the lamp, effectively regulating the emission of light that occurs in the gas inside the tube of the lamp.
  • Electronic ballasts for fluorescent lamps perform the function of generating alternating current at high frequency, regulating the flow thereof through the lamp.
  • Such conventional fluorescent lamps are not devoid of drawbacks among which is the fact that they reach excessively high temperatures.
  • the aim of the present invention is to provide a lamp that solves the above mentioned technical problem, compensates for the drawbacks and overcomes the limitations of the known art by making it possible to reduce the operating temperatures, thus reducing consumption and increasing the average lifetime.
  • Another object of the invention is to provide a lamp that is capable of offering the widest guarantees of reliability and safety in use.
  • Another object of the invention is to provide a lamp that is easy to implement and economically competitive when compared to the known art.
  • a lamp comprising a fluorescent tube which contains gas and a circuit to supply power and control said lamp, said fluorescent tube comprising connections at its ends, said connections being connected to filaments inside said fluorescent tube, characterized in that it comprises a short circuit at the ends of said connections of said fluorescent tube.
  • the lamp generally designated by the reference numeral 1
  • the lamp comprises a fluorescent tube 7 and a power supply and control circuit of the lamp 1.
  • the fluorescent tube 7 comprises, at its ends, connections 11, 12, 21, 22, connected, inside the fluorescent tube 7, to filaments 13 and 23.
  • the connections 11, 12, 21, 22 are, outside the fluorescent tube 7, connected to the power supply and control circuit of the lamp 1.
  • the lamp 1 comprises a short circuit 10, 20 at the ends of the connections 11, 12, 21, 22 of the fluorescent tube 7.
  • the power supply and control circuit of the lamp 1 comprises a filter 2 for electromagnetic interference, a rectifier circuit 3, an integrated circuit 4, an inverter circuit 5 and a resonant circuit 6.
  • the lamp 1 comprises moreover a passive power factor correction circuit 8.
  • the power supply and control circuit of the lamp 1 is designed to perform the function of electronic ballast.
  • Such circuit is adapted to generate high voltage, advantageously in the range comprised between 95 and 260 Volts, at high frequency to supply power to the lamp 1, while regulating the flow of current through the lamp 1 in the meantime.
  • the resonant circuit 5 is adapted to manage the switching on of the fluorescent tube 7 by way of suitable heating of the filaments 13, 23 thereof; such switching on occurs advantageously after a delay of 3 seconds.
  • the alternating voltage of the power supply is converted to direct current by the rectifier circuit 3. Since fluorescent lamps need high voltage power supply and high frequencies, an inverter circuit 5 is used which is adapted to supply such power supply voltage to the lamp 1. In addition a filter 2 is present for the electromagnetic interference generated by such circuits.
  • the power supply and control circuit of the lamp comprises the passive power factor correction circuit 8.
  • the passive power factor correction circuit 8 is adapted to reduce harmonic distortions in current, reduce electromagnetic interference and improve electromagnetic compatibilities.
  • the increase in the power factor also facilitates the implementation of filters for electromagnetic interference.
  • the passive power factor correction circuit 8 is moreover adapted to keep the sinusoidal wave form of the power supply current of the lamp 1 as similar as possible to the sinusoidal wave form of the power supply voltage, thus reducing the distortion and the phase difference of the current wave with respect to the voltage wave, by way of the feedback connection 9 between the fluorescent tube 7 and the passive power factor correction circuit 8.
  • the integrated circuit 4 Based on the value of the peak factor, the integrated circuit 4 implements functions to prevent damage to the lamp 1, by identifying situations wherein the filaments 13, 23 of the fluorescent tube 7 burn out and cutting the power supply thereof, protecting the lamp 1 and preventing damage to the fluorescent tube 7 in the event of possible current surges.
  • the peak factor is also used to identify the average voltage for the inverter circuit 5.
  • the power supply and control circuit of the lamp 1 provides for the application of fuses, advantageously of the "restorable" type.
  • Such circuit moreover provides for the separation of the current lines that carry high intensity current signals from the lines that carry low intensity current signals.
  • the electric current flows from a connection 31 to a connection 32 through a filament 33, then passing through an outer condenser 38 and then from a connection 42 to a connection 41 through a filament 43.
  • the filaments 33 and 43 offer an internal resistance to the passage of current, they heat up.
  • a passage of electrons occurs in the direction 39 in the gas present in the tube of the lamp.
  • the filaments 33 and 43 tend to heat up further, owing to both the passage of current between the connections at the ends of the filaments, and the passage of charges that occurs in the gas in the tube of the lamp. Excessive heating of the filaments 33 and 43 and of the lamp generally involve increased energy consumption.
  • the short circuits 10 and 20 that are provided respectively at the ends of the connections 11, 12 and 21, 22 make it possible to eliminate the resistance to the flow of current offered by the filaments 13 and 23, therefore reducing the passage of current from the connection 11 to the connection 21, through the filament 13, the connection 12, the outer condenser 18, the connection 22 and the filament 23. In this manner the filaments tend to not undergo evident heating, as a consequence also limiting the energy consumption of the lamp 1 and improving both the illumination and the efficiency.
  • the internal temperature of the fluorescent tube 7 of the lamp 1 settles at around 38°C, the temperature at which the luminophor content in the tube presents the maximum efficiency.
  • the filaments 13 and 23 tend to heat up less, in order to switch on the lamp 1 it is necessary to provide high power supply voltages at high frequency, so as to ensure the passage of electric current between the filaments 13 and 23, which is constituted by the passage of electrons through the gas contained in the fluorescent tube 7 of the lamp 1, in the direction 19.
  • the ability to correct the power factor is also aimed at improving the operation of the power supply and control circuit of the lamp, against the use of high frequency, high power supply voltages. Such ability to correct the power factor is ensured by the presence of the feedback 9 between the fluorescent tube 7 and the passive power factor correction circuit 8.
  • the lamp achieves the intended aim and objects in that it makes it possible to have a lower operating temperature, improve lighting efficiency, extend the duration of the average lifetime and reduce energy consumption.
  • Another advantage of the lamp, according to the invention consists in that it prevents overheating of the filaments of the lamp.
  • a further advantage of the lamp, according to the invention consists in that it prevents damage to the circuit if the filaments of the lamp burn out.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP11189419.2A 2011-11-16 2011-11-16 Fluoreszenzlampe Withdrawn EP2595458A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11189419.2A EP2595458A1 (de) 2011-11-16 2011-11-16 Fluoreszenzlampe
PCT/EP2012/062151 WO2013072079A1 (en) 2011-11-16 2012-06-22 Fluorescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11189419.2A EP2595458A1 (de) 2011-11-16 2011-11-16 Fluoreszenzlampe

Publications (1)

Publication Number Publication Date
EP2595458A1 true EP2595458A1 (de) 2013-05-22

Family

ID=46397233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11189419.2A Withdrawn EP2595458A1 (de) 2011-11-16 2011-11-16 Fluoreszenzlampe

Country Status (2)

Country Link
EP (1) EP2595458A1 (de)
WO (1) WO2013072079A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151854A1 (de) * 1971-10-19 1973-04-26 Original Hanau Quarzlampen Schaltanordnung fuer elektrodenwendel von entladungslampen
EP0338109A1 (de) * 1988-04-20 1989-10-25 Zumtobel Aktiengesellschaft Vorschaltgerät für eine Entladungslampe
EP0600340A1 (de) * 1992-12-04 1994-06-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Passive Schaltungsanordnung zur Verbesserung des Leistungsfaktor
US5581161A (en) * 1994-07-13 1996-12-03 Gong; Mingfu DC coupled electronic ballast with a larger DC and smaller AC signal
EP0750447A1 (de) * 1995-06-22 1996-12-27 ECKERLE INDUSTRIE-ELEKTRONIK GmbH Schaltungsanordnung zur Zündung einer Leuchtstofflampe
WO2002096163A2 (de) * 2001-05-23 2002-11-28 Innolux Gmbh Leuchtstofflampenschaltung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50014893D1 (de) 2000-01-18 2008-02-14 Infineon Technologies Ag Mikroprozessoranordnung und Verfahren zum Betreiben einer Mikroprozessoranordnung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151854A1 (de) * 1971-10-19 1973-04-26 Original Hanau Quarzlampen Schaltanordnung fuer elektrodenwendel von entladungslampen
EP0338109A1 (de) * 1988-04-20 1989-10-25 Zumtobel Aktiengesellschaft Vorschaltgerät für eine Entladungslampe
EP0600340A1 (de) * 1992-12-04 1994-06-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Passive Schaltungsanordnung zur Verbesserung des Leistungsfaktor
US5581161A (en) * 1994-07-13 1996-12-03 Gong; Mingfu DC coupled electronic ballast with a larger DC and smaller AC signal
EP0750447A1 (de) * 1995-06-22 1996-12-27 ECKERLE INDUSTRIE-ELEKTRONIK GmbH Schaltungsanordnung zur Zündung einer Leuchtstofflampe
WO2002096163A2 (de) * 2001-05-23 2002-11-28 Innolux Gmbh Leuchtstofflampenschaltung

Also Published As

Publication number Publication date
WO2013072079A1 (en) 2013-05-23

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