WO2003088722A1 - Dispositif d'eclairage pour lampe a decharge - Google Patents

Dispositif d'eclairage pour lampe a decharge Download PDF

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Publication number
WO2003088722A1
WO2003088722A1 PCT/JP2002/003654 JP0203654W WO03088722A1 WO 2003088722 A1 WO2003088722 A1 WO 2003088722A1 JP 0203654 W JP0203654 W JP 0203654W WO 03088722 A1 WO03088722 A1 WO 03088722A1
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WO
WIPO (PCT)
Prior art keywords
discharge lamp
peak
circuit
voltage
capacitor
Prior art date
Application number
PCT/JP2002/003654
Other languages
English (en)
Japanese (ja)
Inventor
Osamu Takahashi
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Mitsubishi Electric Lighting 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 Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Lighting Corporation filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to JP2003585483A priority Critical patent/JP4117561B2/ja
Priority to CNB028119010A priority patent/CN100431392C/zh
Priority to PCT/JP2002/003654 priority patent/WO2003088722A1/fr
Publication of WO2003088722A1 publication Critical patent/WO2003088722A1/fr

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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
    • H05B41/2825—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 bridge converter in the final stage
    • 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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions

Definitions

  • the present invention relates to a discharge lamp lighting device for lighting a discharge lamp with high-frequency power from a self-excited inverter circuit, and detects the lighting state with an inexpensive and small detection circuit.
  • the present invention relates to a discharge lamp lighting device capable of protecting a circuit.
  • FIG. 5 shows a circuit diagram of a conventional discharge lamp device.
  • 1 is a DC power supply obtained from a commercial power supply
  • 2 and 3 are switching elements composed of MOSFETs constituting an inverter circuit
  • L100 and L110 are discharge lamp load circuits connected in parallel.
  • the discharge lamp load circuit L100 includes a choke coil 5, a discharge lamp 6, a capacitor 7 connected in parallel to the discharge lamp 6, and a coupling capacitor 8.
  • the discharge lamp load circuit L 110 comprises a choke coil 9, a discharge lamp 10, a capacitor 11 connected in parallel with the discharge lamp 10, and a coupling capacitor 12.
  • CT 4 is a current transformer (hereinafter referred to as CT) connected between the connection point of the two switching elements 2 and 3 and the connection point of the parallel circuit of the discharge lamp load circuits L100 and L110.
  • the secondary windings 4a and 4b are gates and sources of the switching elements 2 and 3 via the resistors 13 and 14 so that the switching elements 2 and 3 are alternately turned ON / OFF with the polarity shown in the figure. Connected between them (shown by broken lines to show the coupling between the primary and secondary windings of CT 4).
  • P 100 is a discharge lamp load circuit.
  • a peak-to-peak voltage detection circuit that detects the peak-to-peak voltage applied to the power supply.
  • P110 is the discharge lamp load circuit.
  • L110 is the choke coil 9 of L110 and the connection point al10 of the discharge lamp 10 is DC. This is a beak-to-beak voltage detection circuit that detects a peak-to-peak voltage applied between the negative electrode b110 of the power supply 1 (shown near the diode 55).
  • 50 and 51 are capacitors connected in series, one end of 50 is connected to the negative electrode of the DC power supply 1 and the other end of 51 is connected to the choke coil 5 and the discharge lamp 6. Connected to a connection point.
  • Reference numeral 52 denotes a diode having an anode connected to the negative electrode of the DC power supply 1 and a power source connected to a connection point between the capacitor 50 and the capacitor 51.
  • the voltage between the beaks is calculated by the inverse ratio of the capacitance value of the capacitor 51 and the capacitor 50. Take out to the anode of 6.
  • 53 and 54 are capacitors connected in series.
  • One end of 53 is the negative electrode of the DC power supply 1 and the other end of 54 is the choke coil 9 and the discharge lamp 10 Is connected to the connection point.
  • Reference numeral 55 denotes a diode having an anode connected to the negative electrode of the DC power supply 1 and a power source connected to a connection point between the capacitor 50 and the capacitor 51.
  • the voltage between the beaks applied between the connection point a 110 and the negative electrode b 110 of the DC power supply 1 is calculated by the inverse ratio of the capacitance value of the capacitors 54 and 53 to the diode 57. Take out to the anode.
  • the cathodes of the diode 56 and the diode 57 are connected, and a capacitor 58 is connected between the connection point and the negative electrode of the DC power supply 1, and the peak-to-peak voltage detection circuits P100, P110 The higher of the two voltages is beak-detected across the capacitor 58 as a DC voltage.
  • HI 00 is a protection circuit that protects the circuit
  • 61 is a zener diode with a power source connected to the connection point of the diodes 56 and 57 with its anode connected through resistors 60 and 59.
  • To the negative terminal of DC power supply 1 6 2 is a thyristor whose gate is connected to the connection point of the resistor 60 and the resistor 61, and its power source is connected to the negative electrode of the DC power supply 1 and its anode is connected to the power source of the diode 63.
  • the anode of the diode 63 is connected to the gate of the switching element 3.
  • Cyris Evening 6 2 The anode is connected to the positive electrode of DC power supply 1 via resistor 64.
  • Fig. 6 shows a configuration example of DC power supply 1 when DC power is obtained from a commercial power supply.
  • the AC power output from the commercial power supply 1a is full-wave rectified by the diode plunger 1b, then smoothed by the smoothing capacitor 1c, and output to the load circuit as DC power. It is composed of
  • the thyristor 62 does not turn on with the voltage of the capacitor 58 obtained when the discharge lamp 6 is normally lit.
  • the voltage rises such as at the end of the life of the discharge lamp, turn on by the voltage obtained at the capacitor 58.
  • the thyristor 62 is turned on, the current flowing from the secondary winding 4b of the CT 4 to the gate of the switching element 3 via the resistor 13 is bypassed via the diode 63 and the thyristor 62. As a result, the switching element 3 is turned off, and oscillation of the circuit stops.
  • the voltage between both ends of the discharge lamps 6 and 10 is about 95 V in normal lighting, for example, about 95 V at 40 W of a Rabbits sunset fluorescent lamp, and about 12 V at 32 WH f discharge lamp.
  • the voltage of the coupling capacitor is about the same as the voltage between both ends of the discharge lamps 6 and 10, so the peak-to-peak voltage detection circuit: The components that make up P100 and P110 are large. And expensive things were needed.
  • the peak-to-peak voltage detection circuit P 100 since the voltage between al OO and bl OO is a high voltage, a capacitor 5 is required to apply this voltage to the gate of the thyristor 62. It is necessary to appropriately select the capacitance ratio between 1 and the capacitor 50 so that the high voltage between a 100 and b 100 is divided across both ends of the capacitor 50. Due to the voltage division, the detection voltages obtained at the time of normal lighting and abnormal lighting are also reduced at the same voltage division ratio, and there has been a problem that it is difficult to sufficiently discriminate against external noise and the like.
  • the voltage between a 100 and b 100 includes the voltage of the coupling capacitor 8 in addition to the voltage of the discharge lamp 6, so that when the discharge lamp 6 is turned on normally and abnormally. There was a problem that a large difference between the detection voltages could not be obtained.
  • the peak-to-peak voltage detection circuit P110 The same applies to the peak-to-peak voltage detection circuit P110. Also, a combined current of the discharge lamp load circuits L100 and L110 flows through CT4, but one of the discharge lamps is removed due to failure due to the life of discharge lamp 6 or discharge lamp 10, etc. In this case, the current flowing through CT 4 decreases, so that the secondary winding voltage of CT 4 also decreases, and the drive voltage of switching elements 2 and 3 decreases, thereby changing the oscillation frequency of the overnight circuit. As a result, the discharge lamp current attached to the remaining discharge lamp load circuit also changes, and accordingly, the peak-to-peak voltage detection circuits P100 and P110 are obtained during normal lighting and abnormal lighting. There was a problem that the voltage also changed.
  • the present invention has been made to solve the above problems, and a first object of the present invention is to provide an inexpensive and compact device that does not require a large and expensive component constituting a peak-to-peak voltage detection circuit. It is an object of the present invention to provide a discharge lamp lighting device.
  • a second object of the present invention is that the difference between the output voltages of the beak-to-beak voltage detection circuit obtained during normal lighting and abnormal lighting has a sufficient margin against external noise and the like, and the reliability of the operation of the protection circuit is improved. It is an object of the present invention to provide a discharge lamp lighting device with a high level.
  • a third object of the present invention is that even if one of the plurality of discharge lamps is removed, the difference between the output voltage of the peak-to-peak voltage detection circuit that detects the normal lighting state and the abnormal lighting state of the remaining discharge lamps is reduced. Same as the detection voltage difference when all discharge lamps are installed, It is an object of the present invention to provide a discharge lamp lighting device capable of eclipsing an abnormal state in a case.
  • a fourth object of the present invention is that even when one of the plurality of discharge lamps is removed, the difference between the output voltage of the peak-to-peak voltage detection circuit that detects the normal lighting state and the abnormal lighting state of the remaining discharge lamps is reduced.
  • a discharge lamp lighting device comprises: a DC power supply; an inverter circuit including a half-bridge circuit having a pair of switching elements for converting DC supplied from the DC power supply to a high-frequency current; And a discharge lamp lighting circuit for lighting the discharge lamp with a high-frequency current from the discharge lamp, wherein the discharge lamp load circuit includes a series circuit of a choke coil, a discharge lamp, a coupling capacitor, and the discharge lamp in parallel.
  • a secondary that is connected to the pair of switching elements via a current limiting element and is connected to the pair of switching elements via a current limiting element, and that outputs a voltage for driving the pair of switching elements.
  • a winding and a beak-to-beak detecting circuit for detecting a peak-to-peak voltage generated in the secondary winding; When it is detected by the detection circuit voltage exceeds a predetermined value, in which a protection circuit to stop oscillation of the Inba Isseki circuit.
  • the components of the peak-to-peak voltage detection circuit can be small and inexpensive.
  • the difference between the beak-to-beak voltage detection voltage obtained during normal lighting and abnormal lighting provides sufficient margin against external noise, etc., and the operation of the protection circuit can be made more reliable.
  • a discharge lamp is lit by a high-frequency current from a DC power supply, a half-bridge circuit having a pair of switching elements for converting a DC supplied from the DC power supply into a high-frequency current,
  • each of the discharge lamp load circuits includes a series circuit of a choke coil, a discharge lamp, a coupling capacitor, and the discharge lamp.
  • a capacitor connected in parallel to the lamp; a pair of the choke coils of each discharge lamp load circuit; a pair of switching elements connected in parallel to each other via a current limiting element; A secondary winding for outputting a driving voltage, a plurality of peak-to-peak voltage detection circuits for detecting voltages generated in the secondary windings between beaks, and a plurality of peak-to-peak voltage detection circuits. And a protection circuit for stopping the oscillation of the above-mentioned circuit when the voltage obtained by wired-ORing the applied voltage exceeds a predetermined value.
  • the components of the peak-to-peak voltage detection circuit can be small and inexpensive.
  • the difference between the peak-to-peak voltage detection voltage obtained during normal lighting and abnormal lighting as the output voltage of the peak-to-peak voltage detection circuit has sufficient margin against external noise, etc., and improves the operation of the protection circuit. be able to.
  • each discharge lamp load circuit and peak-to-peak voltage detection circuit are provided independently, even if one of the discharge lamps is removed, the abnormal lighting state will be maintained under the same conditions as when all the lamps are installed. Can be detected.
  • the peak-to-peak voltage detection circuit includes a series circuit of capacitors connected in series with each other, and a diode connected in parallel to one of the capacitors, and is connected in parallel with the diode.
  • the capacity of one of the above capacitors is less than four times the capacity of the other capacitor. This makes it possible to stably distinguish between normal and abnormal lighting of the discharge lamp, even if there are variations in components, fluctuations in ambient temperature, external noise, and the like.
  • the peak-to-peak voltage detection circuit has a resistor inserted between the connected secondary winding and the capacitor. As a result, it is possible to suppress the parasitic oscillation caused by the inductance component of the secondary winding of the choke coil and the capacitor component of the peak-to-peak voltage circuit, and to increase the difference between the detection voltage when the discharge lamp is normally lit and the abnormal discharge. be able to.
  • a DC power supply, and a DC supplied from the DC power supply are converted into a high-frequency current—an inverter circuit including a half-bridge circuit having a pair of switching elements; and a discharge lamp is lit by the high-frequency current from the inverter circuit.
  • a discharge lamp lighting device comprising: a plurality of discharge lamp load circuits connected in parallel; The path includes a series circuit of a choke coil, a discharge lamp, a coupling capacitor, and a capacitor connected in parallel to the discharge lamp. A pair is provided in each of the choke coils of each of the discharge lamp load circuits, and each is connected via a current limiting element.
  • a secondary winding connected in parallel to the pair of switching elements to output a voltage for driving the pair of switching elements, and a peak-to-peak detection of a composite voltage of voltages generated in the secondary windings.
  • a protection circuit for stopping the oscillation of the inverter circuit when the voltage detected by the beak-to-beak voltage detection circuit exceeds a predetermined value. .
  • the peak-to-peak voltage detection circuit includes a series circuit of capacitors connected in series, a diode connected in parallel to one of the capacitors, and a plurality of connected secondary windings and the capacitor.
  • FIG. 1 is a circuit diagram of a discharge lamp lighting device according to Embodiment 1 of the present invention
  • FIG. 2 is a circuit diagram of a discharge lamp lighting device according to Embodiment 2 of the present invention
  • FIG. 4 is a circuit diagram of a discharge lamp lighting device according to a third embodiment of the present invention.
  • Fig. 4 is a circuit diagram of a discharge lamp lighting device according to a fourth embodiment of the present invention.
  • Fig. 5 is a conventional discharge lamp.
  • FIG. 6 is a circuit diagram of a DC power supply of a conventional discharge lamp lighting device.
  • FIG. 1 is a circuit diagram of a discharge lamp lighting device according to Embodiment 1 of the present invention.
  • 1 is a DC power supply obtained from a commercial power supply
  • 2 and 3 are switching elements composed of MOS FETs constituting an inverter circuit
  • L100 and L110 are discharge lamp load circuits connected in parallel.
  • the discharge lamp load circuit L100 includes a choke coil 5, a discharge lamp 6, a capacitor 7 connected in parallel with the discharge lamp 6, and a coupling capacitor 8.
  • the discharge lamp load circuit L110 includes a choke coil 9, a discharge lamp 10, a capacitor 11 connected in parallel to the discharge lamp 10, and a coupling capacitor 12.
  • the choke coils 5 and 9 of the discharge lamp load circuits L100 and L110 are provided with two secondary windings 5a, 5b, 9a and 9b, respectively.
  • the switching elements 2 and 3 are connected between the gate and the source via the resistances 13 and 15 and the resistances 14 and 16 so as to alternately drive ON / OFF. (In order to show the connection between the primary winding and the secondary winding of the choke coils 5 and 9, they are shown by dashed lines and broken lines.)
  • the circuit constants of the discharge lamp load circuits L100 and L110 are selected to be equal.
  • the resonance frequencies of the discharge lamp load circuits L100 and L110 at the time of lighting are substantially equal, and each of the choke coils 5 and 9 at the time of lighting.
  • the next winding voltage is set to be substantially equal.
  • P100 is a discharge lamp load circuit.
  • a beak-to-peak voltage detection circuit that detects a peak-to-peak voltage (peak-to-peak voltage) generated in the secondary winding 5b of the choke coil 5 of L100.
  • Lighting load circuit L 1 10 Choke coil 9 2 This is a peak-to-peak voltage detection circuit for detecting a peak-to-peak voltage generated in the next winding 9b.
  • 150 and 1501 are capacitors connected in series, one end of the capacitor 150 is connected to the negative electrode of the DC power supply 1, and the other end of 151 is a choke coil. It is connected to the connection point of the secondary winding 5 b of 5 and the resistor 13.
  • Reference numeral 152 denotes a diode whose anode is connected to the negative electrode of the DC power supply 1 and whose cathode is connected to the connection point between the capacitor 150 and the capacitor 151.
  • the peak-to-peak voltage between the secondary windings of the choke coil 5 is taken out to the anode of the diode 156 at the inverse ratio of the capacitance values of the capacitor 151 and the capacitor 150.
  • 1553 and 154 are capacitors connected in series.One end of 153 is connected to the negative pole of the DC power supply 1, and the other end of 154 is connected to the choke coil 9. Connected to the connection point between the secondary winding and the resistor 15.
  • Reference numeral 155 denotes a diode having an anode connected to the negative electrode of the DC power supply 1 and a cathode connected to a connection point between the capacitor 150 and the capacitor 151.
  • the peak-to-peak voltage of the secondary winding of the choke coil 9 is taken out to the anode of the diode 157 at the inverse ratio of the capacitance value of the capacitors 154 and 153.
  • the power sources of the diode 156 and the diode 157 are connected, and a capacitor 158 is connected between the connection point and the negative electrode of the DC power supply 1, and the peak-to-peak voltage detection circuits P100 and P111 The higher of the 0 voltages is detected as a DC voltage across capacitor 158 as a DC voltage.
  • H 100 is a protection circuit that stops the oscillation of the amplifier circuit when the voltage detected by the peak-to-peak voltage detection circuits P 100 and P 110 exceeds a predetermined value.
  • Reference numeral 61 denotes a zener diode having a power source connected to a connection point between the diodes 156 and 157. The zener diode is connected from its anode to the negative electrode of the DC power supply 1 via resistors 60 and 59.
  • Reference numeral 62 denotes a thyristor whose gate is connected to the connection point between the resistor 60 and the resistor 61.
  • the power source is connected to the negative electrode of the DC power supply 1, and the anode is connected to the cathode of the diode 63.
  • the anode of the diode 63 is connected to the gate of the switching element 3.
  • a direct current is supplied from the anode of thyris
  • the fan is connected to the positive electrode of source 1.
  • the discharge lamp 6 when the discharge lamp 6 reaches the end of its life due to exhaustion of the discharge substance of the filament, the voltage between both ends of the discharge lamp 6 increases from the time of normal lighting, and the voltage between both ends of the choke coil 5 also increases.
  • the change in the voltage is detected by a peak-to-peak voltage detection circuit P100 provided in the secondary winding 5b of the choke coil 5, the anode voltage of the diode 156 rises, and the voltage of the capacitor 158 also increases. To rise.
  • the thyristor 62 is obtained when the discharge lamps 6, 10 are operating normally. It does not turn on with the voltage of the capacitor 158, but turns on with the voltage obtained at the capacitor 158 when the voltage rises at the end of the life of the discharge lamp.
  • the thyristor 62 becomes ⁇ N, the current flowing from the secondary windings 5b and 9b of the choke coils 5 and 9 to the gate of the switching element 3 via the resistors 13 and 15 becomes the diode 6 3 Since the signal is bypassed through the thyristor 62, the switching element 3 becomes 0FF, and the oscillation of the inverter circuit stops.
  • the voltages of the secondary windings 5b and 9b of the choke coils 5 and 9 may be selected so as to obtain a voltage larger than the threshold voltage between the gate and the source of the switching element 3.
  • the beak-to-beak voltage detection circuits P 100 and P 110 can be selected to be sufficiently smaller than those provided between a 100 and bl 00, all O and bll 0, respectively.
  • the components of the inter-beak voltage detection circuit P100 and P110 can be small, inexpensive components with low withstand voltage.
  • the voltage of the secondary winding 5b of the choke coil includes the voltage component of the coupling capacitor 8, which has a small voltage change during normal and abnormal lighting of the discharge lamp 6. Since the detection voltage is not high, the difference between the detection voltage at the time of normal lighting and the detection voltage at the time of abnormal lighting can be made large, and the protection circuit H100 can be sufficiently distinguished from external noise or the like.
  • the peak-to-peak voltage detection circuit P110 Even if one of the discharge lamps is removed due to a failure due to the life of the discharge lamp 6 or the discharge lamp 10, the discharge lamp load circuits L100 and L110 are independent. Peak-to-peak voltage detection circuits P100 and P110 that detect the peak-to-peak voltage during normal and abnormal lighting of the discharge lamp generated in the secondary windings 5b and 9b of the coil are also provided independently. Therefore, even if one lamp is removed, an abnormal lighting state can be detected under the same conditions as when all two lamps are installed.
  • the switching element 3 when the switching element 3 is composed of a MOS FET, the reverse withstand voltage between its gate and source is about 20 V to 30 V or less in a commonly available standard product. If the voltage obtained on the secondary windings 5b and 9b of the coils 5 and 9 is selected so as to be smaller than the reverse withstand voltage between the gate and the source, the switching element 3 can be obtained at a low cost as a MOS FET. Standard products that are easy to use can be used. When the discharge lamp of FL 40 was turned on in the present embodiment, the secondary windings 5b and 9b of the yoke coils 5 and 9 averaged 16.5 V oP (33.
  • the detected voltage difference between normal lighting and abnormal discharge is 5 V P -p, but when the detected voltage difference is less than about 1/4 of the above,
  • the protection circuit H 100 has a Zener diode 61 and other parts.
  • the ratio is not less than about 1 to 4.
  • the peak-to-peak voltage detection circuit has a configuration in which a series circuit of capacitors and a diode are connected in parallel to one of the capacitors, and this circuit is provided in the secondary winding of the choke coil. It is preferable that the capacity of the capacitor connected in parallel with the diode of the peak-to-peak voltage detection circuit be approximately four times or less the capacity of the other capacitor. Time identification can be performed stably with respect to component variations, ambient temperature fluctuations, external noise, and the like.
  • the components of the peak-to-peak voltage detection circuit P100, P110 can be made small, inexpensive parts with low withstand voltage, and the detection voltage during normal lighting and abnormal lighting. Can be increased, and the protection circuit H 100 can be made sufficiently distinguishable from external noise and the like.
  • Embodiment 2 Although the present embodiment has shown a case where there are a plurality of discharge lamp load circuits, a single discharge lamp load circuit may be used. Embodiment 2
  • FIG. 2 is a circuit diagram of a discharge lamp lighting device according to Embodiment 2 of the present invention.
  • the same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
  • 31 is a diode in which the anode is connected to the connection point between the discharge lamp 6 and the coupling capacitor 8, and the cathode is connected to the positive electrode of the DC power supply 1, 3
  • Reference numeral 0 denotes a diode having a cathode connected to the connection point between the discharge lamp 6 and the power coupling capacitor 8 and a negative electrode of the DC power supply 1 connected thereto.
  • 32 and 33 are diodes corresponding to the diode 30 and the diode 31 of the discharge lamp 100 in the discharge lamp load circuit L110.
  • Embodiment 3 is a same effect as in the first embodiment.
  • FIG. 3 is a circuit diagram of a discharge lamp lighting device according to Embodiment 3 of the present invention.
  • 70 is a resistor newly inserted between the capacitor 15 1 and the secondary winding 5 b of the choke coil 5, and 71 is the secondary winding of the capacitor 15 4 and the choke coil 9 9b is the newly inserted resistor.
  • the resistors 70 and 71 are the inductance components of the secondary windings 5 b and 9 b of the choke coils 5 and 9 and the capacitor components of the peak-to-peak voltage detection circuits P 100 and P 110. This causes a parasitic oscillation different from that of the discharge lamp load circuit L100, L110, which suppresses the generation of a voltage at both ends of the capacitor 158 that causes the thyristor 62 to malfunction. This is the braking resistance.
  • the resistors 70 and 71 are appropriately selected, the secondary windings of the choke coils 5 and 9 hardly affect the output voltages of the peak-to-peak voltage detection circuits P100 and P110.
  • Parasitic oscillation due to the inductance component of 5b and 9b and the peak-to-peak voltage detection circuit P100 and P110 capacitor can be suppressed, and the difference between the detection voltage when the discharge lamp is normally lit and when it is abnormally discharged is reduced. It is possible to make the protection circuit H100 more sufficiently identifiable with external noise or the like.
  • FIG. 4 is a circuit diagram of a discharge lamp lighting device according to Embodiment 4 of the present invention.
  • the peak-to-peak voltage detection circuit P110 in the third embodiment is shared with the detection circuit P100 to be one.
  • P 120 is a shared peak-to-peak voltage detection circuit, which is a series circuit composed of capacitors 150 and 151 connected in series, and a diode 1502 connected in parallel to the capacitor 150.
  • the newly inserted resistor 70 between the capacitor 15 1 and the secondary winding 5 b and the resistor 70 between the connection point of the resistor 70 and the capacitor 15 1 and the secondary winding 9 b Composed of resistors 71.
  • the voltage generated in the secondary windings 5 b and 9 b of the choke coils 5 and 9 is combined with the input of the inter-beak voltage detection circuit P 120 via the resistors 70 and 71. Therefore, for example, if the discharge lamp 6 is turned on normally and the discharge lamp 10 is turned on abnormally, such as at the end of life, the anode of the diode 156 is output as the output from the beak-to-beak voltage detection circuit P120. Since the combined peak-to-peak voltage at the time of normal lighting and abnormal lighting is obtained, all the discharge lamps can be lit normally if the zener diode 61, resistor 60 and resistor 59 are properly selected. Occasionally, the protection circuit H 100 does not operate, the discharge lamp 6 lights up normally, and the protection circuit H 100 operates only when the discharge lamp 10 lights up abnormally, such as at the end of life, to stop the oscillation of the inverter circuit. Can be done.
  • the protection circuit H 100 operates when the discharge lamp 6 is abnormally discharged at the end of life or the like, when the discharge lamp 10 is normally lit, and when all the discharge lamps are abnormally lit. As a result, oscillation of the inverter overnight circuit can be stopped.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention porte sur un dispositif d'éclairage destiné à une pluralité de lampes à décharge connectées les unes aux autres parallèlement, ce dispositif étant commandé par des circuits inverseurs en demi-pont (2 et 3). L'invention porte également sur un circuit d'éclairage pour lampe à décharge, de faible coût, compact et extrêmement fiable qui est constitué d'un circuit de protection (H100) qui détecte la tension crête à crête générée dans des enroulements secondaires (5a), (5b), (9a) et (9b) de bobines d'arrêt (5) et (9) par des circuits de détection de tension crête à crête (P100) et (P110), ce circuit de protection arrêtant les circuits inverseurs lorsque la tension détectée dépasse une valeur prédéfinie.
PCT/JP2002/003654 2002-04-12 2002-04-12 Dispositif d'eclairage pour lampe a decharge WO2003088722A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2003585483A JP4117561B2 (ja) 2002-04-12 2002-04-12 放電灯点灯装置
CNB028119010A CN100431392C (zh) 2002-04-12 2002-04-12 放电灯点亮装置
PCT/JP2002/003654 WO2003088722A1 (fr) 2002-04-12 2002-04-12 Dispositif d'eclairage pour lampe a decharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/003654 WO2003088722A1 (fr) 2002-04-12 2002-04-12 Dispositif d'eclairage pour lampe a decharge

Publications (1)

Publication Number Publication Date
WO2003088722A1 true WO2003088722A1 (fr) 2003-10-23

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PCT/JP2002/003654 WO2003088722A1 (fr) 2002-04-12 2002-04-12 Dispositif d'eclairage pour lampe a decharge

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JP (1) JP4117561B2 (fr)
CN (1) CN100431392C (fr)
WO (1) WO2003088722A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100462799C (zh) * 2004-05-11 2009-02-18 三星电子株式会社 背光组件、显示装置和用于显示装置的光源的驱动设备
WO2009061564A1 (fr) * 2007-11-05 2009-05-14 General Electric Company Procédé et système pour éliminer une polarisation en courant continu sur des condensateurs électrolytiques et circuit de détection d'arrêt pour un ballast alimenté en courant
CN100525573C (zh) * 2003-11-28 2009-08-05 三菱电机株式会社 放电灯点灯装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6439271A (en) * 1987-08-04 1989-02-09 Mitsubishi Electric Corp Power source equipment
JPH053083A (ja) * 1991-06-25 1993-01-08 Matsushita Electric Works Ltd 遠隔制御システム用スイツチ装置
JPH05205889A (ja) * 1992-01-22 1993-08-13 Tokyo Electric Co Ltd 放電ランプ点灯装置
JPH10335079A (ja) * 1997-05-30 1998-12-18 Mitsubishi Electric Corp 放電灯点灯装置
JP2001006892A (ja) * 1999-06-16 2001-01-12 Ikeda Electric Co Ltd 放電灯点灯装置
JP2001068290A (ja) * 1999-08-26 2001-03-16 Matsushita Electric Works Ltd 放電灯点灯装置
JP2001093690A (ja) * 1999-09-27 2001-04-06 Matsushita Electric Works Ltd 放電灯点灯装置
JP2001284082A (ja) * 2000-04-03 2001-10-12 Sanyo Electric Co Ltd 蛍光灯点灯装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3026681B2 (ja) * 1992-06-30 2000-03-27 三洋電機株式会社 蛍光灯制御装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6439271A (en) * 1987-08-04 1989-02-09 Mitsubishi Electric Corp Power source equipment
JPH053083A (ja) * 1991-06-25 1993-01-08 Matsushita Electric Works Ltd 遠隔制御システム用スイツチ装置
JPH05205889A (ja) * 1992-01-22 1993-08-13 Tokyo Electric Co Ltd 放電ランプ点灯装置
JPH10335079A (ja) * 1997-05-30 1998-12-18 Mitsubishi Electric Corp 放電灯点灯装置
JP2001006892A (ja) * 1999-06-16 2001-01-12 Ikeda Electric Co Ltd 放電灯点灯装置
JP2001068290A (ja) * 1999-08-26 2001-03-16 Matsushita Electric Works Ltd 放電灯点灯装置
JP2001093690A (ja) * 1999-09-27 2001-04-06 Matsushita Electric Works Ltd 放電灯点灯装置
JP2001284082A (ja) * 2000-04-03 2001-10-12 Sanyo Electric Co Ltd 蛍光灯点灯装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100525573C (zh) * 2003-11-28 2009-08-05 三菱电机株式会社 放电灯点灯装置
CN100462799C (zh) * 2004-05-11 2009-02-18 三星电子株式会社 背光组件、显示装置和用于显示装置的光源的驱动设备
WO2009061564A1 (fr) * 2007-11-05 2009-05-14 General Electric Company Procédé et système pour éliminer une polarisation en courant continu sur des condensateurs électrolytiques et circuit de détection d'arrêt pour un ballast alimenté en courant
US7733028B2 (en) 2007-11-05 2010-06-08 General Electric Company Method and system for eliminating DC bias on electrolytic capacitors and shutdown detecting circuit for current fed ballast

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CN1516992A (zh) 2004-07-28
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JP4117561B2 (ja) 2008-07-16

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