EP0152264A2 - Leuchtstofflampenvorrichtung - Google Patents

Leuchtstofflampenvorrichtung Download PDF

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Publication number
EP0152264A2
EP0152264A2 EP85300761A EP85300761A EP0152264A2 EP 0152264 A2 EP0152264 A2 EP 0152264A2 EP 85300761 A EP85300761 A EP 85300761A EP 85300761 A EP85300761 A EP 85300761A EP 0152264 A2 EP0152264 A2 EP 0152264A2
Authority
EP
European Patent Office
Prior art keywords
discharge tube
electrodes
current
fluorescent lamp
ballast
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Withdrawn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
EP85300761A
Other languages
English (en)
French (fr)
Other versions
EP0152264A3 (de
Inventor
Hidezoh Akutsu
Haruo Yamazaki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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
Priority claimed from JP2215684A external-priority patent/JPS60165037A/ja
Priority claimed from JP59022157A external-priority patent/JPS60165038A/ja
Priority claimed from JP59277224A external-priority patent/JPS61151998A/ja
Application filed by Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Publication of EP0152264A2 publication Critical patent/EP0152264A2/de
Publication of EP0152264A3 publication Critical patent/EP0152264A3/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Withdrawn legal-status Critical Current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
    • H05B41/282—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
    • H05B41/2821—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 by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes

Definitions

  • the present invention relates to a fluorescent lamp device.
  • a discharge tube made by bending a long and slender glass tube into a double U-shpae, and a case with a base is attached to the open end of the lamp envelope.
  • the discharge tube has an electrode at each of its ends and its inner surface has a phosphor coating. Mercury and rare gas are put into the discharge tube.
  • the discharge tube employs an amalgam forming metallic material such as In, BiIn or BiPbSn, which is placed in a stem tube at either of the tube ends. Also, disposed inside the case are a choke coil type ballast and a glow starter.
  • the metallic material forms amalgam with filling-in mercury.
  • the mercury vapor pressure over the amalgam is lower than that of the pure mercury. Therefore, even if the tube temperature rises so high up to around 100°C, the mercury vapor pressure iR:the tube can be adjusted within an optimum range for luminous efficacy of the discharge tube, say around 6 x 10 3 Torr.
  • the compact fluorescent lamp device of this type shows a high overall efficacy of more than 40 lm/W almost comparable to three times that of an incandescent lamp. Furthermore, it is convenient in that it can be used by simply screwing as such into an incandescent lamp socket.
  • the first drawback is that the weight of the fluorescent lamp device is more than 400 g, which is substantially heavier as compared with the incandescent lamp. This is due to the fact that the weight of the choke coil ballast is as large as about 250 g. The fact that the weight of the fluorescent lamp device is large prevents it from coming into wide use on a full scale.
  • the second drawback is that, when particularly the lamp is operated at low ambient temperatures ranging from 0 to 10°C, it shows light flickering for several minites just after lamp ignition. This is a phenomenon which markedly occurs in the lamps using a discharge tube made by bending a slender tube.
  • the flicker phenomenon is caused by the fact that when the lamp is operated with the ordinary ac current, the time required for the discharge to re-ignite differs from one cycle to another and thus the discharge current is varied with cycles.
  • the inventors have made studies to obtain a fluorescent lamp device which would accomplish the above-mentioned objects.
  • the discharge tube is operated with dc current, basically the re-ignition voltage is no longer present with the result that the ratio of the lamp voltage to the power supply voltage is increased and the ballast loss is decreased correspondingly thus reducing the size and weight of the ballast. Also, the dc operation can completely prevent the occurrence of flicker of the light.
  • a discharge tube 10 made by bending a long and slender glass tube into a double U-shape is held in place within a lamp envelope 11.
  • a resistance ballast 12 including an electric lamp having a tungsten filament placed within a glass tube.
  • a white diffusing coating 13 is formed on the inner surface of the lamp envelope 11.
  • a case 14 is attached to the open end of the lamp envelope 11. Then, excluding the resistance ballast 12, the other lamp circuit components which will be described later are all contained within the case 14.
  • An incandescent lamp base 15 is attached to the bottom of the case 14.
  • Fig. 2 shows the construction of the discharge tube 10.
  • electrodes 16 and 17 are respectively held in place by lead wires 18 and 19 and stems 20 and 21 and the discharge tube 10 is coated on the inner surface with a phospher 22.
  • mercury and rare gas e.g., argon are put into the discharge tube 10.
  • an amalgam forming metallic material 24, e.g., In, BiIn or BiPbSn is placed inside a small glass tube 23 at the rear of one of the stems, i.e., the stem 20. When the lamp is operated, the metallic material 24 forms amalgam with mercury.
  • Fig. 3 shows the operating circuit of the fluorescent lamp device described above.
  • numeral 25 designates an ac power source, 26 a full-wave bridge rectifier, and 27 a smoothing capacitor. The ac power is converted to dc power by the full-wave bridge rectifier 26 and the smoothing capacitor 27.
  • Numeral 28 designates a thyristor (PnPn diode) which functions to supply a preheating current to the electrode coil (the cathode) during the lamp starting period.
  • Numeral 29 designates an electronic starter including a pulse transformer 30, a thyristor 31 (PnPn diode), a capacitor 32, a resistor 33 and a diode 34.
  • the discharge tube 10 shown in Fig. 10 When the discharge tube 10 shown in Fig. 10 is first operated by the above-described circuit using as the cathode the electrode 16 arranged close to the amalgam material 24, the occurrence of a cataphoresesis phenomenon in a short period of time is observed. In this case, the cataphoresis phenomenon becomes more marked as the ambient temperature decreases. For instance, in the ambient temperature of 0 to 10°C, the cataphoresis phenomenon occurs in several minutes after lamp ignition and moreover the cataphoresis phenomenon is so eminent that the light output is made dim over the portions amounting to more than 3/4 of the whole area of the discharge tube 10.
  • the presence of the amalgam material 24 on the anode side has the effect of causing a diffusion phenomenon of the mercury from the cathode region to the anode region due to the mercury vapor pressure difference (being higher in the cathode side than in the anode). Accordingly, it is considered that the movement of the mercury from the anode region to the cathode region due to the electrophoresis is cancelled by the moverment of the mercury in the opposite direction due to the diffusion phenomenon provided by the amalgam.
  • Table 2 shows the specifications and characteristics of the compact fluorescent lamp device constructed as shown in Fig. 1 in comparison with the conventional device.
  • the overall efficacy of the embodiment device of this invention attains a level of about 40 lm/W and the weight is also reduced to about one half that of the conventional device. Also, in accordance with the invention the flicker of light is eliminated.
  • the present invention is not intended to be limited to the operation on the resistor ballast; its basic concept is applicable to electronic ballast systems characterized by a compact and light construction and no light flickering as well.
  • present-day commercial electronic ballasts for fluorescent lamps which employ ac high-frequency operating systems such as push-pull type and blocking type inverters have only one drawback of high cost.
  • the present invention offens chopping type electronic operating systems having a simple circuitry and therefore a lower price as compared with the above ac high-frequency systems.
  • Figures 5 and 6 illustrate typical circuits of chopping type ballasts.
  • the circuit in Figure 5 uses dc chopping system in which the discharge tube is operated with almost smoothed dc current.
  • the electrode near to the amalgam material should be taken as anode.
  • numeral 35 desginates a power transistor, 36 a control circuit including a multivibrator, 37 a choke coil, 38 a diode, 39 a capacitor, and 40 a starter device including a glow starter.
  • the circuit in Fig. 6 is ac chopping operating system in which the discharge tube is operated with asymmetric ac current having some dc component as shown in Fig. 7.
  • numeral 41 designates a diode
  • 42 a bidirectional two-terminal thyristor (SSS)
  • 43 a bidirectional two-terminal thyristor
  • 44 a current detection transformer
  • 45 a choke coil
  • 46 a power transistor
  • 47 a capacitor 48 a diode.
  • Both fluorescent lamp devices employing the above chopping type operating systems present a higher overall efficacy of around 50 lm/W than that of the previously mentioned device having the resistor ballast, because of extremely reduced power loss of the electronic ballasts.
  • the chopping type operating circuit features a simple design of one power transistor type and no power transformer, therefore being relatively less costy as compared with the conventional ac high-frequency inverter circuits.
  • the present invention is not intended to be limited to the bent-type compact fluorescent lamp device and it is also applicable to fluorescent lamps of the other types such as the tubular and circ-line types.
  • the studies by the inventors have confiremd that the invention is applicable to such tubular-type copier fluorescent lamps operated under high load conditions.
  • the present invention is basically applicable to devices in which the supply voltage V s is not 100 V.
  • a compact fluorescent lamp device operable at a supply voltage V s of 120 V has been manufactured for trial and it has been confirmed that is overall efficacy is substantially the same level as the devices of the type whose supply voltage V s is 100 V.
  • the mounting position of the amalgam material 24 is not always limited to the rear of the electrode and what is important is the fact that it is positioned close to the electrode which functions as the anode.
  • the discharge tube and the lamp circuit section need not be combined as a unit and the object of the invention, i.e., a fluorescent lamp device which is light in weight and relatively high in overall efficacy can still be realized even if the two are separately mounted in a luminair, for example.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP85300761A 1984-02-08 1985-02-05 Leuchtstofflampenvorrichtung Withdrawn EP0152264A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2215684A JPS60165037A (ja) 1984-02-08 1984-02-08 螢光ランプ装置
JP59022157A JPS60165038A (ja) 1984-02-08 1984-02-08 螢光ランプ装置
JP22156/84 1984-02-08
JP22157/84 1984-02-08
JP59277224A JPS61151998A (ja) 1984-12-25 1984-12-25 螢光ランプ装置
JP277224/84 1984-12-25

Publications (2)

Publication Number Publication Date
EP0152264A2 true EP0152264A2 (de) 1985-08-21
EP0152264A3 EP0152264A3 (de) 1986-06-25

Family

ID=27283738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300761A Withdrawn EP0152264A3 (de) 1984-02-08 1985-02-05 Leuchtstofflampenvorrichtung

Country Status (1)

Country Link
EP (1) EP0152264A3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794301A (en) * 1986-08-19 1988-12-27 Kabushiki Kaisha Toshiba Fluorescent lamp having a convoluted discharge passage and fluorescent lamp apparatus incorporating the same
GB2210520A (en) * 1987-09-28 1989-06-07 Hubbell Inc Starting and operating circuit for a super compact fluorescent lamp
EP0578415A1 (de) * 1992-06-30 1994-01-12 Ge Lighting Limited Gleichstrom gespeicherten Fluoreszenzlampe
GB2314965A (en) * 1996-07-01 1998-01-14 Matsushita Electronics Corp Light-bulb-shaped fluorescent lamp
US6013310A (en) * 1992-09-25 2000-01-11 Sharp Kabushiki Kaisha Method for producing a thin film semiconductor device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE923497C (de) * 1943-02-05 1955-02-14 Patra Patent Treuhand Quecksilber-Niederdruckentladungslampe fuer Gleichstrombetrieb
DE1252801B (de) * 1967-10-26
DE1589137A1 (de) * 1966-09-21 1970-03-12 Egyesuelt Izzolampa Hochbelastete Leuchtstoffroehre neuerer Ausfuehrung
US4173730A (en) * 1978-07-11 1979-11-06 Westinghouse Electric Corp. Compact fluorescent lamp unit having integral circuit means for DC operation
US4268780A (en) * 1980-03-28 1981-05-19 Gte Products Corporation Integrated fluorescent-incandescent lamp assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252801B (de) * 1967-10-26
DE923497C (de) * 1943-02-05 1955-02-14 Patra Patent Treuhand Quecksilber-Niederdruckentladungslampe fuer Gleichstrombetrieb
DE1589137A1 (de) * 1966-09-21 1970-03-12 Egyesuelt Izzolampa Hochbelastete Leuchtstoffroehre neuerer Ausfuehrung
US4173730A (en) * 1978-07-11 1979-11-06 Westinghouse Electric Corp. Compact fluorescent lamp unit having integral circuit means for DC operation
US4268780A (en) * 1980-03-28 1981-05-19 Gte Products Corporation Integrated fluorescent-incandescent lamp assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794301A (en) * 1986-08-19 1988-12-27 Kabushiki Kaisha Toshiba Fluorescent lamp having a convoluted discharge passage and fluorescent lamp apparatus incorporating the same
GB2210520A (en) * 1987-09-28 1989-06-07 Hubbell Inc Starting and operating circuit for a super compact fluorescent lamp
EP0578415A1 (de) * 1992-06-30 1994-01-12 Ge Lighting Limited Gleichstrom gespeicherten Fluoreszenzlampe
US6013310A (en) * 1992-09-25 2000-01-11 Sharp Kabushiki Kaisha Method for producing a thin film semiconductor device
GB2314965A (en) * 1996-07-01 1998-01-14 Matsushita Electronics Corp Light-bulb-shaped fluorescent lamp
US5844357A (en) * 1996-07-01 1998-12-01 Matsushita Electronics Corporation Light-bulb-shaped fluorescent lamp
GB2314965B (en) * 1996-07-01 2001-02-14 Matsushita Electronics Corp Light-bulb-shaped fluorescent lamp
DE19726919C2 (de) * 1996-07-01 2003-03-27 Matsushita Electric Ind Co Ltd Glühbirnenförmige Leuchtstoffröhrenlampe

Also Published As

Publication number Publication date
EP0152264A3 (de) 1986-06-25

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Inventor name: YAMAZAKI, HARUO

Inventor name: AKUTSU, HIDEZOH