WO1995002311A1 - Lampe fluorescente non stroboscopique a economie d'energie - Google Patents

Lampe fluorescente non stroboscopique a economie d'energie Download PDF

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Publication number
WO1995002311A1
WO1995002311A1 PCT/GB1993/002496 GB9302496W WO9502311A1 WO 1995002311 A1 WO1995002311 A1 WO 1995002311A1 GB 9302496 W GB9302496 W GB 9302496W WO 9502311 A1 WO9502311 A1 WO 9502311A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
fluorescent lamp
stroboscopic
tube
fluorescent
Prior art date
Application number
PCT/GB1993/002496
Other languages
English (en)
Inventor
Lu Zhenping
Original Assignee
Kadesum Limited
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 Kadesum Limited filed Critical Kadesum Limited
Priority to AU56550/94A priority Critical patent/AU5655094A/en
Publication of WO1995002311A1 publication Critical patent/WO1995002311A1/fr

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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/2325—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
    • 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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/234—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps to eliminate stroboscopic effects, e.g. feeding two lamps with different phases

Definitions

  • This invention is a type of fluorescent lamp, and in particular a type of non-stroboscopic energy-saving fluorescent lamp.
  • the ordinary fluorescent lamps in use now normally include four parts, namely, a fluorescent tube, a ballast, a starter and a lamp bracket.
  • the fluorescent tube is a glass tube whose inner wall is covered with a layer of fluorescent powder and its two ends with filament electrodes are sealed. A given amount of argon, or other inert gases, and a small quantity of mercury or amalgam is added into the vacuum tube.
  • ballasts There are two types of ballasts, i.e. the induction type and the electronic type.
  • the fluorescent lamp with the induction ballast flashes one hundred or one hundred and twenty times per second due to the alternative current (AC) of 50 or 60 Hz used. This phenomenon which is called the stroboscopic effect affects human vision.
  • AC alternative current
  • the fluorescent tube requires a optimum current value which gives best lighting efficiency.
  • part of the current will exceed this optimum value causing higher consumption of electricity.
  • the fluorescent lamp with induction ballast is hard to start in the area where voltage is lower than the standard voltage. Therefore, in the past twenty or thirty years many engineers and technicians have attempted to solve this problem.
  • Philips of Holland first developed an electronic ballast which works with such high frequency as 30 to 60 kHz in the early 1980's. Its appearance attracted people's attention immediately for its higher lighting efficiency and its capability of starting at lower voltage. However, it has not effectively eliminated the high frequency stroboscopic effect and the low frequency stroboscopic effect is also not completely eliminated. It only modulates a high frequency on the frequency of the mains supply. Consequently it has both the low frequency stroboscopic effect of 50 or 60 Hz and the high frequency stroboscopic effect of 30 to 60 kHz. The difference is that its low frequency stroboscopic effect is not as strong as that of the induction ballast and that its influence on human vision is less serious.
  • An object of this invention is to improve the ordinary fluorescent lamp by converting the current passing through the tube from AC into stable DC in order to provide a type of non-stroboscopic energy-saving fluorescent lighting which not only can reduce the energy consumption of the ballast and improve the tube's light efficiency but also is characterized by non-stroboscopic effect and low- voltage start-up.
  • Embodiments of this invention can eliminate the dark area at the positive electrode of the fluorescent tube caused by the migration of mercury from the positive electrode to the negative electrode under direct current. This is achieved through thermal diffusion of mercury by using fluorescent tube of suitable inert gas pressure and a thermal insulating lamp cover.
  • a type of non-stroboscopic energy-saving fluorescent lamp consists of a fluorescent tube with suitable amount of inert gas, a DC electronic ballast and a thermal insulating lamp cover.
  • the DC electronic ballast is made up of a voltage doubler or a multiple booster rectifier, a step-down circuit, a bridge rectifier filter, a transistor regulator circuit and a protective circuit. Between the voltage doubler, or the multiple booster rectifier, and the bridge rectifier filter there is a unilateral conductive circuit.
  • One electrode of the bridge rectifier filter is connected to one electrode of the fluorescent tube. Its other electrode is connected to the other electrode of the tube through the protective circuit, the unilateral conductive circuit and the transistor regulator circuit.
  • the protective circuit, the unilateral conductive circuit, the transistor regulator circuit and the fluorescent tube are connected in series.
  • Figure 1 is the flow chart of the non-stroboscopic energy- saving fluorescent lamp.
  • the mains supply passing through the voltage doubler or multiple booster rectifier is converted into high voltage and starts the tube. Once the tube is started, due to the high internal resistance of the doubler and multiple booster rectifier, the high voltage is no longer supplied.
  • the working current then passes through the step-down circuit, the bridge rectifier, the protective circuit, the unilateral conductive circuit and the transistor regulator circuit to the fluorescent tube.
  • FIG. 1 is the circuit diagram of the non-stroboscopic energy-saving fluorescent lamp.
  • Dotted-Line Frame 1 in it is the voltage doubler or the multiple booster rectifier.
  • Dotted-Line Frame 2 in it is the step-down circuit.
  • Dotted-Line Frame 3 in it is the bridge rectifier filter.
  • Dotted-Line Frame 4 in it is the transistor regulator circuit.
  • Dotted-Line Frame 5 in it is the protective circuit.
  • Dotted-Line Frame 6 in it is the unilateral conductive circuit and the filament-preheating starter circuit is obtained by connecting the starter and the resistor (R5) in series.
  • the fluorescent tube is covered by suitable thermal insulating lamp cover.
  • a diode (D5) is connected between the positive electrode of the bridge rectifier (D4) and the filter condenser (C5) so that the filter condenser (C5) does not discharge in order to lessen the shock of current to the filament when it is preheated.
  • FIG. 5 shows that the starter and the resistor (R5) are connected to the filaments at the two ends of the fluorescent tube.
  • Figure 6 shows that the starter and the resistor (R5) are omitted and the fluorescent tube is initiated by cold start-up.
  • the positive electrode of the bridge rectifier filter is connected to the electrode at one end of the fluorescent tube through the protective circuit, the unilateral conductive circuit and the transistor regulator circuit and its negative electrode is connected to the electrode at the other end of the fluorescent tube.
  • the positions of the protective circuit, the unilateral conductive circuit, the transistor regulator circuit and the fluorescent tube which are connected in series may be inter-changed except the unilateral conductive circuit must be always at the positive end of the bridge rectifier circuit.
  • the DC electronic ballast starts the tube by applying high voltage to its electrodes and converts AC into stable DC. It works as follows: the high voltage produced by the voltage doubler or the multiple booster rectifier is applied to the two ends of the fluorescent tube to start the tube.
  • the tube Because of the great internal resistance of the circuit of the voltage doubler or the multiple booster rectifier, once the tube is started it no longer supplies high voltage.
  • the mains supply stepped down by the step-down circuit, after passing through the bridge rectifier filter, the protective circuit, the unilateral conductive circuit, the transistor regulator circuit is supplied to the fluorescent tube.
  • the original AC is already converted into DC with stable working voltage after passing through the step-down circuit and the bridge rectifier filter.
  • the protective circuit, the unilateral conductive circuit, the transistor regulator circuit it is now a smooth and more stable DC to be supplied to the tube.
  • the stroboscopic phenomenon is eliminated.
  • the fluorescent tube is energized with DC for some time, the brightness at the tube's positive electrode will decrease due to the migration of mercury. This problem is solved through thermal diffusion of mercury by using a thermal insulating lamp cover and a fluorescent tube with inert gas pressure not exceeding 300 pa.
  • the above-mentioned step-down circuit is obtained by connecting in parallel the condenser (C4) and the resistor (Rl).
  • the working voltages of ordinary fluorescent tubes range from 45V to 110V.
  • Resistor (Rl) is used to discharge the condenser (C4) so that the mains plug is not electrified after it is disconnected.
  • the above- mentioned protective circuit is obtained by connecting in parallel a current-limiting resistor (R6) and a thyristor delay circuit which is formed by a thyristor (V2), a diode (D7), a resistor (R7), a stabilovolt (W) and an electrolytic capacitor (C7).
  • D7 and R7 are connected to the positive electrode of V2; W is connected to the control electrode of V2; C7 is connected to the negative electrode of V2.
  • the transistor triode (VI) functions as a regulator tube.
  • R6 is a current-limiting resistor. When the fluorescent tube is just started, the discharge current of the condenser (C5) is comparatively great and it may burn the transistor (VI).
  • the current flow goes to the tube through the resistor (R6) where a step-down of more than 10 volts occurs.
  • the current generated by the step- down of more than 10 volts goes to the electrolytic capacitor (C7) through the resistor (R7).
  • W is switched on and the thyristor (V2) is also switched on.
  • the current flow goes on to the tube through the thyristor (V2) and the step-down at the resistor (R6) disappears.
  • the electrolytic capacitor (C7) is discharged through the diode (D7) and the thyristor (V2) and is ready for another charge.
  • the resistor (R6) consumes less electricity so that the thyristor delay circuit can be omitted (see Diagram 3), namely, V2, D7,R7, W and C7 can be omitted.
  • the starter and the resistor (R5) can also be connected between the filaments at the two ends of the fluorescent tube.
  • the starter can be replaced by a relay. If the starter and the resistor (R5) are omitted, the fluorescent tube can be initiated by cold start-up (see Diagram 5) .
  • This invention changes the working current of fluorescent tube from the original AC to stable DC, hence getting rid of the annoying stroboscopic phenomenon. In addition, it offers energy-saving effect.
  • the reason lies in the fact that DC can be adjusted close to the optimum current value which results in the best light efficiency of the fluorescent tube.
  • the DC electronic ballast itself consumes less energy than the induction ballast.
  • the 40W fluorescent lamp Diode D is 1N4007; triode VI is 3DD15A or SDD13005; thyristor V2 is MCR 100-6 stabilovolt W is 2CW54; condensers C1-C3 are 0.01 ⁇ F 630V C4 is 9 ⁇ F 250V; electrolytic capacitor C5 is 150 ⁇ F 330V C6 is 100 uF 16V; C7 is 22 uF 10V; resistor Rl is 220K; R2 is 330K; R3 , R4 are 2K; R5 is 51 ohm; R6 is 100 ohm; R7 is 100K.
  • the 9W fluorescent lamp Diode D is 1N4007; triode VI is DD01A or SDD13003; condenser C1-C3 are 0.01 ⁇ F 630V; C4 is 2.4 juF 250V; electrolytic capacitor C5 is 40 F 330V; C6 is 100 ⁇ F 16V; resistor Rl is 220K; R2 is 330K; R3 , R4 are 3K; R5 , R6 are 51 ohm.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Une lampe fluorescente de type non stroboscopique, à économie d'énergie, se compose d'un tube fluorescent renfermant une quantité appropriée de gaz inerte, comprenant un ballast électronique à courant continu et un revêtement de tube isolant thermique. Le ballast électronique à courant continu se compose d'un doubleur de tension ou d'un redresseur-survolteur multiple, d'un circuit abaisseur de tension, d'un filtre de redresseur à pont, d'un circuit régulateur du transistor, d'un circuit conducteur unilatéral et d'un circuit protecteur de façon à avoir une haute tension lorsqu'on allume le tube et à convertir le courant alternatif en courant continu stable au moment où le courant de service alimente le tube. Ce type de lampe fluorescente élimine l'effet stroboscopique de façon à ne pas nuire à la vision de l'homme. De plus, elle a un effet significatif en matière d'économie d'énergie, le tube a une durée de vie plus longue, et elle peut être allumée à basse tension. On pense que ce type de lampe fluorescente offre plusieurs avantages importants par rapport aux lampes fluorescentes ordinaires.
PCT/GB1993/002496 1993-07-06 1993-12-06 Lampe fluorescente non stroboscopique a economie d'energie WO1995002311A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56550/94A AU5655094A (en) 1993-07-06 1993-12-06 A non-stroboscopic energy-saving fluorescent lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN93112478.6 1993-07-06
CN 93112478 CN1031842C (zh) 1993-07-06 1993-07-06 无频闪节能荧光灯装置

Publications (1)

Publication Number Publication Date
WO1995002311A1 true WO1995002311A1 (fr) 1995-01-19

Family

ID=4990086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/002496 WO1995002311A1 (fr) 1993-07-06 1993-12-06 Lampe fluorescente non stroboscopique a economie d'energie

Country Status (5)

Country Link
CN (1) CN1031842C (fr)
AU (1) AU5655094A (fr)
MX (1) MX9403932A (fr)
TW (1) TW276310B (fr)
WO (1) WO1995002311A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1003355A1 (fr) * 1998-11-10 2000-05-24 Yousef Husni Barikhan Circuit d'amor age booster pour lampe à décharge
DE10125510A1 (de) * 2001-05-23 2002-12-05 Innolux Gmbh Leuchtstofflampenschaltung
GB2448560A (en) * 2007-04-20 2008-10-22 Cyden Ltd Drive circuit for discharge tube

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1101532C (zh) * 1999-10-10 2003-02-12 陆镇平 无频闪直流荧光灯
CN1310575C (zh) * 2003-05-23 2007-04-11 陆镇平 无频闪节能直流荧光灯
JP5294903B2 (ja) * 2008-08-21 2013-09-18 パナソニック株式会社 負荷制御装置及びそれを備えた負荷制御システム
CN105953083A (zh) * 2016-05-30 2016-09-21 王松来 一种无频闪无辐射无蓝光危害的直流荧光灯

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2036795A1 (de) * 1970-07-24 1972-01-27 Kaiser W Schaltung zum Zünden und Unterhalten von Gasentladungen
EP0134282A1 (fr) * 1983-02-14 1985-03-20 GTE Products Corporation Circuit de ballast électronique
US5072160A (en) * 1988-07-13 1991-12-10 Yang Tai Her Device for periodically alternating bulb polarities of a DC fluorescent lighting system
GB2265773A (en) * 1992-04-03 1993-10-06 Hubbell Inc Low loss, electronic ballast for discharge lamps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2036795A1 (de) * 1970-07-24 1972-01-27 Kaiser W Schaltung zum Zünden und Unterhalten von Gasentladungen
EP0134282A1 (fr) * 1983-02-14 1985-03-20 GTE Products Corporation Circuit de ballast électronique
US5072160A (en) * 1988-07-13 1991-12-10 Yang Tai Her Device for periodically alternating bulb polarities of a DC fluorescent lighting system
GB2265773A (en) * 1992-04-03 1993-10-06 Hubbell Inc Low loss, electronic ballast for discharge lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1003355A1 (fr) * 1998-11-10 2000-05-24 Yousef Husni Barikhan Circuit d'amor age booster pour lampe à décharge
DE10125510A1 (de) * 2001-05-23 2002-12-05 Innolux Gmbh Leuchtstofflampenschaltung
GB2448560A (en) * 2007-04-20 2008-10-22 Cyden Ltd Drive circuit for discharge tube

Also Published As

Publication number Publication date
CN1079282A (zh) 1993-12-08
CN1031842C (zh) 1996-05-22
AU5655094A (en) 1995-02-06
TW276310B (fr) 1996-05-21
MX9403932A (es) 1995-01-31

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