WO2008029445A1 - Appareil d'éclairage à lampe à décharge - Google Patents

Appareil d'éclairage à lampe à décharge Download PDF

Info

Publication number
WO2008029445A1
WO2008029445A1 PCT/JP2006/317518 JP2006317518W WO2008029445A1 WO 2008029445 A1 WO2008029445 A1 WO 2008029445A1 JP 2006317518 W JP2006317518 W JP 2006317518W WO 2008029445 A1 WO2008029445 A1 WO 2008029445A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge lamp
lighting
circuit
discharge
inrush current
Prior art date
Application number
PCT/JP2006/317518
Other languages
English (en)
Japanese (ja)
Inventor
Satoshi Kominami
Toshiaki Kurachi
Kenichirou Takahashi
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to PCT/JP2006/317518 priority Critical patent/WO2008029445A1/fr
Publication of WO2008029445A1 publication Critical patent/WO2008029445A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
    • 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
    • H05B41/2806—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 without electrodes in the vessel, e.g. surface discharge lamps, electrodeless discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention relates to a lighting device for an external electrode type discharge lamp that is lit by a dielectric barrier discharge, and in particular, a discharge lamp is provided with a lighting period and a non-lighting period, and is adjusted by changing the time ratio between these periods.
  • the present invention relates to a discharge lamp lighting device that performs light lighting.
  • FIG. 8 is a block diagram showing a conventional configuration of a discharge lamp lighting device using dielectric barrier discharge.
  • a conventional discharge lamp lighting device includes a lighting circuit 100 including a DC power source 110, an inverter circuit 120, a dimming control circuit 130, and a step-up transformer 140, and a discharge lamp 150.
  • the inverter circuit 120 includes a rectangular wave signal generation circuit 121, a drive circuit 122, and a switching circuit 123.
  • the drive circuit 122 includes a rectangular wave signal Vp (see FIG. 9A) having a predetermined frequency (for example, 25 kHz) generated by the rectangular wave signal generation circuit 121, and a PWM (Pulse Width Modulation) from the dimming control circuit 130.
  • Vp rectangular wave signal
  • PWM Pulse Width Modulation
  • the switching circuit 123 Based on the drive signal Vd from the drive circuit 122, the switching circuit 123 converts the DC voltage supplied from the DC power supply 110 into a rectangular wave voltage Vr (see FIG. 9 (d)) having a predetermined frequency (for example, 25 kHz), and boosts the voltage. Output to transformer 140. [0005]
  • the step-up transformer 140 boosts the rectangular wave voltage Vr applied to the primary coil to a high voltage (for example, lkV) rectangular wave voltage Vs (see FIG. 9 (e)), so that both electrodes of the discharge lamp 150 Apply between them and turn on the discharge lamp 150.
  • dimming is performed by changing the duty ratio of the PWM signal Vdim.
  • a first period Ton (lighting period) in which the rectangular wave voltage Vs is applied and a second period Toff (light-out period) in which the rectangular wave voltage Vs is not applied are provided.
  • Dimming (hereinafter referred to as “burst dimming”) for adjusting the brightness (light emission luminance) of the discharge lamp 150 by changing the time ratio (ratio) of the period is performed. For example, if the duty ratio TonZ (Ton + Toff) is set to 70%, the rectangular wave voltage Vs is applied only during a period of 70% of the predetermined period (Ton + Toff). Is 70%.
  • Patent Document 1 discloses a technique for suppressing unnecessary radiation noise by grounding an external electrode provided on the surface of a discharge lamp, particularly in a lamp using an internal / external dielectric noria discharge.
  • Patent Document 2 discloses an example of another countermeasure against unnecessary radiation noise. According to Patent Document 2, especially when a plurality of discharge lamps are lit by a plurality of lighting circuits, the phase of the voltage waveform applied to each discharge lamp is asynchronous with each other and the output power to each lamp is adjusted independently. A technique for suppressing unnecessary radiation noise is disclosed. Patent Document 1: JP 2000-106148 A
  • Patent Document 2 JP-A-8-146198 Disclosure of the invention
  • the above-described conventional discharge lamp lighting device is relatively effective in suppressing unwanted radiation noise in a 100% lighting state (hereinafter referred to as “all-light lighting”) that does not require dimming lighting. .
  • all-light lighting a 100% lighting state
  • all-light lighting a 100% lighting state
  • the new radiation that unnecessary radiation noise cannot be sufficiently suppressed. The problem was revealed.
  • the present invention has been made in view of powerful circumstances, and is suitable for a discharge lamp lighting device using a dielectric barrier discharge. Another object of the present invention is to provide a discharge lamp lighting device that can sufficiently suppress unnecessary radiation noise.
  • the inventor of the present invention examined the cause of unnecessary radiation noise generated during dimming in a lighting device using a dielectric barrier discharge. As a result, the rectangular wave voltage was turned off during burst dimming. We found that this is due to the inrush current that occurs when the force changes to ON. Based on this fact, the present inventor has conceived the idea of suppressing the inrush current to the discharge lamp generated during burst dimming in order to suppress unnecessary radiation noise during dimming! did.
  • the discharge lamp lighting device is a device that lights a discharge lamp that emits light by dielectric barrier discharge.
  • the discharge lamp lighting device applies dimming lighting by applying a rectangular wave high-frequency voltage to the discharge lamp, providing the discharge lamp with a lighting period and an extinguishing period, and changing the time ratio between the lighting period and the extinguishing period.
  • an inductive element is connected in series between the discharge lamp and the lighting circuit. With this configuration, inductive elements limit the inrush current that flows each time the discharge lamp re-lights after the extinguishing period when dimming lighting is performed by changing the time ratio between the lighting period and the extinguishing period. Radiation noise is suppressed.
  • the inrush current suppression action can reduce power consumption, and it is possible to suppress unnecessary radiation noise while improving the circuit efficiency of the lighting circuit.
  • the impedance of the inductive element is set so that the value at a measurement frequency of 100 MHz is 200 ⁇ or more and 22 k ⁇ or less.
  • inrush current can be suppressed more efficiently. Therefore, unnecessary radiation noise can be efficiently suppressed.
  • the lighting circuit may include a step-up transformer!
  • an inductive element is connected in series between the discharge lamp and the step-up transformer.
  • the discharge gas sealed in the discharge lamp preferably contains xenon and substantially does not contain mercury. Since the discharge gas sealed in the discharge lamp is xenon, it is excellent in ionization and excitation efficiency during discharge and can be a high-intensity light source. In addition, since the discharge gas does not contain mercury, adverse effects on the environment can be reduced.
  • the inrush current that flows through the discharge lamp every time the discharge lamp re-lights after the extinguishing period is applied to the discharge lamp. It is limited by the inductive element or resistance element (inrush current suppression circuit) connected in series, which can greatly reduce unnecessary radiation noise during dimming.
  • FIG. 1 is a block diagram showing an example of a discharge lamp lighting device according to the present invention.
  • FIG. 2 Cross section of the discharge lamp of the present invention
  • FIG. 3 is a circuit diagram showing an example of a lighting circuit in the discharge lamp of the present invention.
  • FIG. 5 is a diagram showing another configuration example of the discharge lamp
  • FIG. 6 is a diagram showing still another configuration example of the discharge lamp.
  • FIG. 8 is a block diagram showing the configuration of a conventional discharge lamp lighting device
  • FIG. 9 Waveform diagrams at various parts of a conventional discharge lamp lighting device
  • the inventor of the present application conducted extensive research to elucidate the cause of unnecessary radiation noise, and as a result, measured the current I flowing through the discharge lamp with a resolution higher than the resolution for measuring the frequency of the voltage Vs applied to the discharge lamp.
  • the spike-like current described below is the cause of unwanted radiation noise.
  • the inventor of the present application newly noticed the discovery of the spike-like current, and came to the present invention based on this discovery.
  • FIG. 7 is a diagram schematically showing a waveform of a high-pressure rectangular wave voltage Vs applied to a discharge lamp that emits light by dielectric barrier discharge and a flowing current I.
  • Fig. 7 (a) shows 100% luminance, that is, the waveform when all the lights are on
  • Fig. 7 (b) shows the waveform when burst dimming.
  • Fig. 7 (a) when all the lights are on, an almost constant pulse current flows when the polarity of the high-voltage rectangular wave voltage Vs is reversed.
  • spike-like inrush current Isp flows in the first pulse current when the discharge lamp 10 is turned on again after the extinguishing period, and then it is the same as when all lights are turned on. Pulse current Ip flows (see enlarged view A in Fig. 7 (b)).
  • the peak value of the spike-like inrush current shown in Fig. 7 (b) may be 3 to 5 times the peak value of the pulse current.
  • This phenomenon does not occur in other cold cathode lamps or the like, or even if it occurs, a large spike-shaped inrush current does not flow so far.
  • This phenomenon occurs when the voltage applied to the dielectric barrier discharge lamp is a rectangular wave voltage. This phenomenon is considered to be peculiar to discharge lamps. In other words, the cold cathode lamp is a resistive load, but the dielectric barrier discharge lamp is a capacitive load. Therefore, a spike-like inrush current tends to flow at the start of discharge of the charge accumulated in the capacitive load. It is considered to be.
  • spike-like inrush current is one cause of unnecessary radiation noise based on the above-described event.
  • the present inventor has conceived the idea of suppressing spike-like inrush current in order to suppress unnecessary radiation noise, and has devised a discharge lamp lighting device shown below.
  • FIG. 1 is a block diagram showing an embodiment of a discharge lamp lighting device of the present invention.
  • the discharge lamp lighting device is a device that drives a discharge lamp 10 that emits light by dielectric barrier discharge, and has a burst dimming function.
  • the discharge lamp lighting device includes a DC power supply 40, an inverter circuit 50, a dimming control circuit 60,
  • the lighting circuit 20 including the step-up transformer 70 is provided.
  • an inrush current suppression circuit 30 that suppresses an inrush current flowing into the discharge lamp 10 is connected in series between the lighting circuit 20 and the discharge lamp 10.
  • the inrush current suppression circuit 30 limits the inrush current to the discharge lamp 10 and suppresses unnecessary radiation noise.
  • FIG. 2 shows an example of the configuration of the discharge lamp 10.
  • FIG. 2 (a) is a side sectional view
  • FIG. 2 (b) is an axial sectional view at the central portion of the discharge lamp 10.
  • the discharge lamp 10 is a mixed gas containing xenon as a discharge gas in a cylindrical arc tube 11 formed of borosilicate glass, soda glass or the like having excellent transmittance in visible light (wavelength: 380 ⁇ m to 770 nm). Is enclosed and formed.
  • the sealing pressure is set in the range of 5 to 40 kPa, for example.
  • the mixed gas components other than xenon are helium, neon, argon, krypton, etc., and the mixing ratio is 6: 4, for example.
  • a phosphor 15 is applied to the inner surface of the arc tube 11.
  • Inside one end of the arc tube 11 is an internal electrode 12 made of metal such as tungsten or nickel.
  • the lead wire 13 is electrically led out of the arc tube 11.
  • an external electrode 14 made of metal such as aluminum or copper is disposed outside the arc tube 11.
  • the DC power supply 40 is configured by a DC / DC converter using a smoothing rectifier circuit, a chopper circuit, a DC voltage source (battery), etc., and rectifies a commercial AC power supply voltage to generate DC power. Pressure and output to the inverter circuit 50.
  • the inverter circuit 50 includes a rectangular wave signal generation circuit 51, a drive circuit 52, and a switching circuit 53.
  • the rectangular wave signal generation circuit 51 generates a rectangular wave signal Vp having a predetermined frequency and outputs it to the drive circuit 52.
  • the frequency of the rectangular wave signal Vp determines the lighting frequency of the discharge lamp 10 and is set in the range of 10 to: LOOkHz.
  • the drive circuit 52 generates a drive signal Vd based on the rectangular wave signal Vp input from the rectangular wave signal generation circuit 51 and the dimming signal Vdim input from the dimming control circuit 60, and supplies the driving signal Vd to the switching circuit 53. Output.
  • the switching circuit 53 is connected to the DC power supply 40, converts the DC voltage supplied from the DC power supply 40 to the rectangular wave voltage Vr based on the drive signal Vd input from the drive circuit 52, and converts the converted rectangular wave. Apply voltage Vr to the primary side (primary coil) of step-up transformer 70.
  • the step-up transformer 70 boosts the rectangular wave voltage Vr applied to the primary coil to a high-voltage rectangular wave voltage Vs and applies it between both electrodes of the discharge lamp 10 via the inrush current suppression circuit 30. .
  • the voltage value of the high-voltage rectangular wave voltage Vs is about 1 to 3 kV.
  • the dimming control circuit 60 receives an instruction signal Sig for instructing an increase in the emission luminance of the discharge lamp 10 and a decrease in Z, and performs dimming according to the instruction signal Sig.
  • An optical signal Vdim is generated and output to the drive circuit 52.
  • the instruction signal Sig is a signal having a signal level of, for example, 0 to 5 V inputted from the outside, and the signal level indicates a set value of the light emission luminance of the discharge lamp 10.
  • the dimming signal Vdim is a PWM signal with a frequency lower than the frequency of the rectangular wave signal Vp, and its frequency is set to 100 to lkHz.
  • the pulse width of the dimming signal Vdim changes according to the instruction signal Sig.
  • the inrush current suppression circuit 30 is composed of an inductive element.
  • the inrush current suppression circuit 30 suppresses the inrush current that flows through the discharge lamp 10 when the discharge lamp 10 is turned on again after the extinguishing period (OFF) during burst dimming and Thus, it has an impedance that does not affect the current flowing through the discharge lamp 10.
  • inrush current suppression The circuit 30 preferably has an impedance of 200 ⁇ or more at a measurement frequency of 100 MHz.
  • FIG. Figure 3 shows the configuration of a push-pull lighting circuit.
  • FIG. 4 shows voltage waveforms at various parts of the lighting circuit 20 of FIG.
  • the operation of the lighting circuit 20 will be described with reference to FIGS.
  • the rectangular wave signal generation circuit 51 generates a rectangular wave signal Vp having a predetermined frequency (for example, 25 kHz) shown in FIG.
  • the rectangular wave signal generation circuit 51 can be constituted by a timer IC or the like, for example.
  • the drive circuit 52 includes a flip-flop circuit 54, an AND circuit 55, and a NOR circuit 56.
  • the rectangular wave signal Vp from the rectangular wave signal generation circuit 51 is input to the CK terminal as a clock signal
  • the dimming signal Vdim from the dimming control circuit 60 is input to the D terminal as a data signal. Entered.
  • the flip-flop circuit 52 captures the signal level of the data signal (dimming signal Vdim) at the rising edge of the clock signal (rectangular wave signal Vp), holds the captured signal level at other than the rising edge, and outputs a non-inverted output signal.
  • Q and inverted output signal ZQ are output.
  • the AND circuit 55 inputs the non-inverted output signal Q from the flip-flop circuit 54 and the rectangular wave signal Vp from the rectangular wave signal generation circuit 51, and outputs the drive signal Vdl shown in Fig. 4 (c). To do.
  • the NOR circuit 56 inputs the inverted output signal ZQ from the flip-flop circuit 54 and the rectangular wave signal Vp from the rectangular wave signal generation circuit 51, and outputs the drive signal Vd2 shown in FIG. 4 (d).
  • the drive signals Vdl and Vd2 are signals having opposite polarities, and when the drive signal Vdl is high level, the drive signal Vd2 is low level. Conversely, when the drive signal Vdl is low level, the drive signal Vd2 is high level.
  • the switching circuit 53 includes FETs 57 and 58.
  • the drive signals Vdl and Vd2 are input to the gates of the FETs 57 and 58, respectively.
  • the FETs 57 and 58 are alternately turned ON and OFF according to the drive signals Vdl and Vd2, respectively, and the rectangular wave voltages Vrl and Vr2 shown in FIGS. 4 (e) and (f) are applied to the primary side of the step-up transformer 70.
  • the dimming control circuit 60 includes a triangular wave generation circuit 61 and a comparator 62.
  • the triangular wave generation circuit 61 outputs a triangular wave signal of, for example, 250 Hz, which determines the frequency of burst dimming, to the comparator 62.
  • the triangular wave generating circuit 61 can be composed of, for example, an OP amplifier. Co
  • the triangular wave signal from the triangular wave generating circuit 61 is inputted to the inverting input of the comparator 62, and the instruction signal Sig for instructing the increase of the emission luminance Z of the discharge lamp 10 is inputted to the non-inverting input.
  • the comparator 62 compares the triangular wave signal with the instruction signal Sig, and outputs a dimming signal Vdim of 250 Hz having a noise width corresponding to the instruction signal Sig to the drive circuit 52.
  • the step-up transformer 70 is composed of a primary winding and a secondary winding.
  • a DC power supply 40 and FETs 57 and 58 of a switching circuit 53 are connected to the primary side of the step-up transformer 70, and a discharge lamp 10 is connected to the secondary side via an inrush current suppression circuit 30.
  • the step-up transformer 70 uses the rectangular wave voltages Vrl and Vr2 input to the primary side according to the step-up ratio determined by the ratio of the primary and secondary windings to the high voltage rectangle shown in Fig. 4 (g). The voltage is increased to a wave voltage Vs (for example, lkV) and applied to the discharge lamp 10.
  • Vs for example, lkV
  • a rectangular wave voltage is used instead of a sine wave voltage. This is because the xenon excimer emission increases and more ultraviolet rays are emitted when the rectangular wave voltage is used, so that the light emission efficiency is improved.
  • an inrush current suppression circuit 30 is connected in series between the discharge lamp 10 and the step-up transformer 70.
  • the effect of the inrush current suppression circuit 30 will be described.
  • the measurement was performed at 25 kHz, using a liquid crystal backlight unit using two discharge lamps with 2 lkPa of 6: 4 xenon-argon mixed gas in an arc tube with an inner diameter of 2 mm, an outer diameter of 2.6 mm, and a length of 160 mm. It was lit with a square wave of lkV. The frequency of burst dimming is 250Hz.
  • the inrush current suppression circuit 30 is an inductive element with an impedance of 600 ⁇ at a measurement frequency of 100 MHz. Are connected to the discharge lamp 10 in series.
  • Unnecessary radiated noise is regulated in various ways depending on the equipment, but here is the standard for measurement methods complied by the International Special Committee on Radio Interference of the International Electrotechnical Commission (IEC). Unwanted radiation noise was measured by a method compliant with CISPR25. Table 1 shows the results measured by the CISPR25 method.
  • Table 1 shows the results of measuring broadband unwanted radiation noise in each frequency band. Normally, CISPR25 ⁇ koo! /, The regulation of unwanted radiation noise is in the frequency range of 150kHz to 1GHz, and there is a regulation of unwanted radiation noise in a specific discrete frequency range. Only the measured frequency range is displayed as a representative.
  • the impedance value of the inductive element of the inrush current suppression circuit 30 is changed to reduce unnecessary radiation noise.
  • Table 2 shows the measurement results. Except for the impedance value of the inrush current suppression circuit 30, the measurement sample and measurement method are the same as in Table 1.
  • the upper limit value of impedance at 100 MHz that can suppress spike-like inrush current is not limited to 2000 ⁇ .
  • Table 2 the effect of reducing unwanted radiation noise cannot be expected even if the impedance is too high.
  • the impedance at 100 MHz is too large, the normal pulse current waveform may be affected and the luminous efficiency of the discharge lamp 10 may change.
  • the inventor of the present application As a result of the measurement, it was found that the impedance of the inrush current suppression circuit 30 is preferably not less than 200 ⁇ and not more than 22 k ⁇ in practice when the measurement frequency is 100 MHz.
  • the measurement was performed by connecting ten inductive elements (product number: BLM21BD222SN1L, manufactured by Murata Manufacturing Co., Ltd.) having an impedance of 2.2 k ⁇ at 100 MHz as the inrush current suppression circuit 30 in series.
  • the upper limit of the impedance at 100MHz may exceed 22k ⁇ ! /.
  • the reason for specifying the impedance value of the inductive element in the 100 MHz band in the present invention is that the spike-like inrush current is not affected by the pulse current in FIG. It is for suppressing.
  • the inrush current suppression circuit 30 having impedance in the discharge lamp operating frequency band (kHz band, for example, 10 kHz or more and 100 kHz or less) is inserted, the pulse current in FIG. Efficiency is reduced.
  • the pulse current is not intended for the increased pulse current (starting current in this document), which is the subject of JP-A-6-96891. Impedance is specified for spike-like currents that occur in a much shorter time.
  • an inductive element having the above impedance range (value at 100 MHz is 200 ⁇ or more and 22 k ⁇ or less) has a small impedance value in the lighting frequency range (kHz band, for example, 10 kHz or more and 100 kHz or less). This had almost no effect on the luminous efficiency and circuit efficiency.
  • FIG. 2 shows a force that shows a configuration in which one internal electrode 12 is disposed inside the discharge lamp 10 force arc tube 11 and one external electrode 14 is disposed outside the arc tube 11.
  • a rare gas discharge lamp having a plurality of internal electrodes 12 and a rare gas discharge lamp having a plurality of external electrodes 14 are not limited to the configuration shown in FIG.
  • the configuration of the discharge lamp is such that the internal electrode 12 is disposed at one end of the arc tube 11 and a plurality of external electrodes 14a, 14b, as in the discharge lamp 81 shown in FIG. ⁇ 14h emits light
  • a configuration arranged outside the tube 11 may also be used.
  • the internal electrodes 12a and 12b may be disposed at both ends of the arc tube 11, and one external electrode 14 may be disposed outside the arc tube 11.
  • the internal electrodes 12a, 12b are arranged at both ends of the arc tube 11, and a plurality of external electrodes 14a, 14b,.
  • positioned outside may be sufficient.
  • the axial cross section at the center of the discharge lamps 81, 82, 83 is the same as in FIG. 2 (b). Further, three or more internal electrodes 12 may be provided.
  • the shape of the external electrode 14 of the discharge lamp 10 may be away from the arc tube 11 which does not need to be in contact with the outer surface of the arc tube 11, or may be of the planar shape shown in FIG. It is not limited to anything.
  • the external electrode 85 having a concave cross section in the tube axis direction is disposed outside the arc tube 11 so as to partially cover the circumferential direction of the arc tube 11. It may be configured.
  • the external electrode 14 may be wound around the outer surface of the arc tube 11 in a spiral manner.
  • the discharge gas sealed in the arc tube 11 is a mixed gas containing xenon.
  • the discharge gas may not be a mixed gas but may be a gas of 100% xenon.
  • the lighting circuit 20 has been described with the lighting circuit having the push-pull method and the configuration, other methods such as a half-bridge method and a full-bridge method may be used. In this case, it goes without saying that the configuration of the boosting transformer 70 changes.
  • the rectangular wave signal generation circuit 51, the drive circuit 52, and the dimming control circuit 53 may have other configurations, for example, a single microcomputer. Further, a PWM signal may be directly input from the outside as the instruction signal Sig from the outside. In this case, the instruction signal Sig may be input to the drive circuit 52 as the dimming signal Vdim.
  • a force using FETs 57 and 58 as a switching element of the switching circuit 53 may be another switching element, for example, a bipolar transistor.
  • the discharge lamp lighting device can be used as a light source for various purposes, and is particularly useful as a backlight for a liquid crystal display or the like, a light source for reading a document for a scanner or a copy, and the like.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

L'invention concerne un appareil d'éclairage à lampe à décharge, qui utilise la décharge de barrière diélectrique, lequel appareil comprend un circuit d'allumage (20) qui applique une tension haute fréquence ayant une forme d'onde rectangulaire à une lampe à décharge (10) pour faire varier un rapport temporel de périodes de temps d'éclairage en marche et d'éclairage arrêté établi pour la lampe à décharge, fournissant ainsi une lumière modulée ; et un élément inductif (30) qui est connecté en série entre la lampe à décharge (10) et le circuit d'allumage (20) et qui a une valeur d'impédance entre 200 ohms et 22 kilo-ohms à une fréquence de 100 MHz. L'élément inductif (30) supprime le courant d'appel circulant dans la lampe à décharge (10) pendant la fourniture de la lumière modulée, réduisant ainsi le bruit radiant non souhaité.
PCT/JP2006/317518 2006-09-05 2006-09-05 Appareil d'éclairage à lampe à décharge WO2008029445A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/317518 WO2008029445A1 (fr) 2006-09-05 2006-09-05 Appareil d'éclairage à lampe à décharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/317518 WO2008029445A1 (fr) 2006-09-05 2006-09-05 Appareil d'éclairage à lampe à décharge

Publications (1)

Publication Number Publication Date
WO2008029445A1 true WO2008029445A1 (fr) 2008-03-13

Family

ID=39156890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/317518 WO2008029445A1 (fr) 2006-09-05 2006-09-05 Appareil d'éclairage à lampe à décharge

Country Status (1)

Country Link
WO (1) WO2008029445A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011120450A (ja) * 2009-10-30 2011-06-16 Tdk Corp ワイヤレス給電装置、ワイヤレス電力伝送システムおよびそれらを利用したテーブルと卓上ランプ
JP2011120451A (ja) * 2009-10-28 2011-06-16 Tdk Corp ワイヤレス給電装置、ワイヤレス電力伝送システムおよびそれらを利用したテーブルと卓上ランプ
US8772977B2 (en) 2010-08-25 2014-07-08 Tdk Corporation Wireless power feeder, wireless power transmission system, and table and table lamp using the same
US8829727B2 (en) 2009-10-30 2014-09-09 Tdk Corporation Wireless power feeder, wireless power transmission system, and table and table lamp using the same
WO2018235307A1 (fr) * 2017-06-22 2018-12-27 株式会社東芝 Dispositif de génération d'ozone et alimentation électrique pour dispositif de génération d'ozone

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0339300U (fr) * 1989-08-25 1991-04-16
JPH0696891A (ja) * 1992-09-10 1994-04-08 Toshiba Lighting & Technol Corp 放電灯点灯装置
JPH06295790A (ja) * 1993-04-12 1994-10-21 Ikeda Densoo Kk 放電灯点灯装置
JP2003323994A (ja) * 2002-05-07 2003-11-14 Matsushita Electric Ind Co Ltd 放電灯点灯装置
JP2004055523A (ja) * 2002-05-31 2004-02-19 Matsushita Electric Ind Co Ltd 放電灯点灯装置
JP2004281367A (ja) * 2003-02-28 2004-10-07 Matsushita Electric Ind Co Ltd 光源装置およびそれを用いた液晶ディスプレイ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0339300U (fr) * 1989-08-25 1991-04-16
JPH0696891A (ja) * 1992-09-10 1994-04-08 Toshiba Lighting & Technol Corp 放電灯点灯装置
JPH06295790A (ja) * 1993-04-12 1994-10-21 Ikeda Densoo Kk 放電灯点灯装置
JP2003323994A (ja) * 2002-05-07 2003-11-14 Matsushita Electric Ind Co Ltd 放電灯点灯装置
JP2004055523A (ja) * 2002-05-31 2004-02-19 Matsushita Electric Ind Co Ltd 放電灯点灯装置
JP2004281367A (ja) * 2003-02-28 2004-10-07 Matsushita Electric Ind Co Ltd 光源装置およびそれを用いた液晶ディスプレイ

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011120451A (ja) * 2009-10-28 2011-06-16 Tdk Corp ワイヤレス給電装置、ワイヤレス電力伝送システムおよびそれらを利用したテーブルと卓上ランプ
JP2011120450A (ja) * 2009-10-30 2011-06-16 Tdk Corp ワイヤレス給電装置、ワイヤレス電力伝送システムおよびそれらを利用したテーブルと卓上ランプ
US8829727B2 (en) 2009-10-30 2014-09-09 Tdk Corporation Wireless power feeder, wireless power transmission system, and table and table lamp using the same
US8772977B2 (en) 2010-08-25 2014-07-08 Tdk Corporation Wireless power feeder, wireless power transmission system, and table and table lamp using the same
WO2018235307A1 (fr) * 2017-06-22 2018-12-27 株式会社東芝 Dispositif de génération d'ozone et alimentation électrique pour dispositif de génération d'ozone
JP2019006620A (ja) * 2017-06-22 2019-01-17 株式会社東芝 オゾン発生装置、およびオゾン発生装置用の電源装置

Similar Documents

Publication Publication Date Title
JP4744064B2 (ja) 管外電極蛍光ランプ用バックライトアセンブリ及びその駆動方法並びに液晶表示装置
EP1768468A2 (fr) Dispositif d' éclairage à lampe à forte décharge, et appareil d' éclairage
JP4853638B2 (ja) 高圧放電灯点灯装置
WO2008029445A1 (fr) Appareil d'éclairage à lampe à décharge
KR101539581B1 (ko) 광원 구동 방법, 이를 수행하기 위한 광원 어셈블리 및 이를 갖는 액정 표시 장치
JPWO2007125704A1 (ja) 誘電体バリア放電ランプ点灯装置および誘電体バリア放電ランプの点灯本数検知方法
US20040100209A1 (en) Electric discharge lamp and electric discharge lamp drive apparatus
JP2009110681A (ja) 高圧放電灯点灯装置及び光源装置
JP2003100482A (ja) 誘電体バリア放電ランプ点灯装置
US6605905B2 (en) Discharge lamp driving apparatus and lighting fixture using the apparatus
JP5262647B2 (ja) 高圧放電灯点灯装置、プロジェクタ及び高圧放電灯の始動方法
JP2009059645A (ja) 放電ランプ点灯装置
JP2004039264A (ja) ランプ点灯システム
JP2010010088A (ja) 補助光源付き高圧放電灯用点灯装置の始動回路、該始動回路を用いた点灯装置並びに該点灯装置を用いた光源装置
JPWO2006087853A1 (ja) 放電灯点灯装置
JP3446099B2 (ja) 放電灯点灯装置
JPH08288084A (ja) ネオン放電ランプ点灯回路装置
JP5035002B2 (ja) 希ガス蛍光ランプ点灯装置
JP2005071857A (ja) 誘電体バリア放電ランプ点灯装置
US8167676B2 (en) Fluorescent lighting system
JP2006120502A (ja) 高圧放電灯点灯装置
JP2002075682A (ja) 放電灯点灯装置
JP5035422B2 (ja) 放電管点灯装置
JP2002289390A (ja) 放電灯装置
JP2005259493A (ja) 放電灯の調光方法及び放電灯点灯装置

Legal Events

Date Code Title Description
DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 06797424

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 06797424

Country of ref document: EP

Kind code of ref document: A1