EP2339896B1 - Dispositif d'éclairage par lampe à décharge haute pression et accessoire d'illumination - Google Patents

Dispositif d'éclairage par lampe à décharge haute pression et accessoire d'illumination Download PDF

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Publication number
EP2339896B1
EP2339896B1 EP10195984.9A EP10195984A EP2339896B1 EP 2339896 B1 EP2339896 B1 EP 2339896B1 EP 10195984 A EP10195984 A EP 10195984A EP 2339896 B1 EP2339896 B1 EP 2339896B1
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EP
European Patent Office
Prior art keywords
discharge lamp
pressure discharge
voltage
determining
starting
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EP10195984.9A
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German (de)
English (en)
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EP2339896A3 (fr
EP2339896A2 (fr
Inventor
Naoki Komatu
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of EP2339896A3 publication Critical patent/EP2339896A3/fr
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    • 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
    • H05B41/288—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 preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2885—Static converters especially adapted therefor; Control thereof
    • H05B41/2887—Static converters especially adapted therefor; Control thereof characterised by a controllable bridge in the final stage

Definitions

  • the present invention relates to a high pressure discharge lamp lighting device and an illumination fixture.
  • a high pressure discharge lamp lighting device for lighting a high-pressure discharge lamp using light emission by arc discharge in metal vapor has been conventionally proposed (refer to, for example, JPT-2005-507554).
  • Fig. 12 illustrates an example of this type of high pressure discharge lamp lighting device.
  • This type of a high pressure discharge lamp lighting device includes a power converting circuit 1 that appropriately converts a DC voltage inputted from a DC power source E and outputs the converted voltage to a high-pressure discharge lamp DL, a lamp voltage detecting circuit 2 that detects an effective value of a voltage between both ends of the high-pressure discharge lamp DL (hereinafter referred to as a "lamp voltage") V1a and a control circuit 3 that controls the power converting circuit 1 according to the effective value of the lamp voltage V1a detected by the lamp voltage detecting part 2.
  • a battery may be used as the DC power source E, and a well-known DC power circuit that converts AC power inputted from an AC power source (not shown) such as an external commercial power source into DC power having a predetermined voltage may be also used.
  • an AC power source not shown
  • an external commercial power source such as an external commercial power source
  • the power converting circuit 1 includes a full-bridge circuit formed by connecting two series circuits between output ends of the DC power source E in parallel with each other, the series circuits each formed of two elements of switching elements Q1 to Q4, an inductor L1 having one end connected to a connection point between the switching elements Q3, Q4 of one of the above-mentioned series circuits and the other end connected to one end (that is, one electrode) of the high-pressure discharge lamp DL, an autotransformer AT having one end connected to the other end (that is, the other electrode) of the high-pressure discharge lamp DL and the other end connected to a connection point between the switching elements Q1, Q2 of the other of the above-mentioned series circuits, a first capacitor C1 connected to a series circuit formed of the autotransformer AT and the high-pressure discharge lamp DL in parallel, and a second capacitor C2 having one end connected to a tap in the autotransformer AT (that is, between a series wiring and a shunt wiring) and the other end connected to
  • the above-mentioned switching elements Q1 to Q4 each have a parasitic diode and are connected so that a forward direction of the parasitic diode is opposite to a direction of the voltage of the DC power source E.
  • a field effect transistor for example, can be used as each of the switching elements Q1 to Q4.
  • the lamp voltage detecting part 2 may be formed using a voltage dividing resistor (not shown).
  • the lamp voltage detecting part 2 may include a rectifying diode (not shown) or a smoothing capacitor (not shown) as necessity arises.
  • the control circuit 3 is formed of, for example, an integrated circuit called as a microcomputer and turns on/off each of the switching elements Q1 to Q4 of the power converting circuit 1, thereby controlling an output from the power converting circuit 1 to the high-pressure discharge lamp DL.
  • the control circuit 3 described above can be realized according to well-known techniques, detailed illustration and description thereof are omitted.
  • the control circuit 3 When starting lighting of the high-pressure discharge lamp DL, the control circuit 3 first, as shown in Fig. 13 , performs a starting operation P1 of controlling the power converting circuit 1 so as to output a high voltage necessary for starting lighting of the high-pressure discharge lamp DL to the high-pressure discharge lamp DL for a predetermined starting period.
  • the switching elements Q1 Q2, Q4 are turned on/off so that a pair of the high-voltage side switching element Q1 connected to the autotransformer AT and the low-voltage side switching element Q4 connected to the inductor L1, and the low-voltage side switching element Q2 connected to the autotransformer AT are alternately turned on while keeping the high-voltage side switching element Q3 connected to the inductor L1 in an OFF state.
  • the starting operation P1 an operation of gradually changing a frequency for the above-mentioned turning-on/off from a high-frequency side to a low-frequency side of a resonance frequency of a resonance circuit formed of the shunt wiring of the autotransformer AT and the second capacitor C2 for a predetermined time is repeated a predetermined number of times (three times in this figure).
  • a high voltage obtained by increasing a voltage due to resonance of the resonance circuit by the autotransformer AT is outputted to the high-pressure discharge lamp DL.
  • the high voltage causes discharge in the high-pressure discharge lamp DL, thereby starting (that is, activating) lighting of the high-pressure discharge lamp DL.
  • control circuit 3 performs the determining operation P2 of comparing the lamp voltage V1a detected by the lamp voltage detecting part 2 with a predetermined start determining voltage in the state where the power converting circuit 1 is controlled so that a DC voltage is outputted to the high-pressure discharge lamp DL (the lamp voltage V1a becomes a DC voltage) after completion of the starting operation P1.
  • the switching element Q4 is periodically turned on/off.
  • the lamp voltage V1a in the determining operation P2 becomes the same level as an output voltage of the DC power source E when the high-pressure discharge lamp DL in not lighted, and the lamp voltage V1a while the high-pressure discharge lamp DL is lighted is lower than that while the high-pressure discharge lamp DL is not lighted.
  • the start determining voltage is set so that the lamp voltage V1a is smaller than the start determining voltage when the high-pressure discharge lamp DL is lighted and the lamp voltage V1a becomes equal to or larger than the start determining voltage when the high-pressure discharge lamp DL is not lighted.
  • the control circuit 3 starts a steady operation P3 of controlling the power converting circuit 1 so as to keep lighting of the high-pressure discharge lamp DL.
  • the steady operation P3 by performing a similar operation to the determining operation P2 while alternately switching the pair of switching elements Q1 to Q4 to be kept in the OFF state at a relatively low frequency (hereinafter referred to as a "steady frequency"), rectangular wave AC power having the steady frequency is outputted to the high-pressure discharge lamp DL.
  • the control circuit performs a stopping operation P0 of stopping an input of power to the high-pressure discharge lamp DL by keeping all of the switching elements Q1 to Q4 of the power converting circuit 1 in the OFF state for a predetermined time and then, performs a series of operations from the starting operation P1 in the starting period to the determining operation P2 again.
  • JP 2004 273172 A1 discloses a lighting device according to the preamble of claim 1, adapted to light a discharge lamp via a DC-AC converter by raising the voltage of a DC power source by means of a DC-DC converter connected to the DC power source.
  • a voltage inputted from the DC power source drops to a predetermined lower limit voltage or when the extinction of the discharge voltage due to a rise in the output voltage of the DC-DC converter is detected, the operation of the DC-DC converter is stopped.
  • the input voltage of the DC power source reaches a predetermined starting voltage, the operation is resumed.
  • the blinking of the discharge lamp due to the above process is repeated more than a predetermined number of times, the operation of the DC-DC converter is kept stopped.
  • JP 3 305352 B2 shows a lighting device to stably light an electric discharge lamp instantly by providing a voltage decrease restraining capacity and a diode.
  • Parallel to a series circuit of the lamp and a pulse transformer secondary coil a bypass capacity for a high voltage pulse is provided.
  • Electric charge of a capacity is applied onto a secondary side of a pulse transformer PT via a switch so as to form a high voltage pulse, thus starting a lamp.
  • a part of the electric charge of a first capacity is stored in a second capacity, at which a voltage is higher than a voltage of a first capacity.; Electric charge of the second capacity is discharged to the parallel circuit comprising the series circuit and the bypass capacity, through a closed circuit including a diode. Consequently, it is possible to restrain a voltage of the side bypass capacity from being rapidly decreased at the time of starting of the lamp, prevent the lamp from being extinguished, and to stably light the lamp instantly.
  • Figs. 15(a) (b) illustrate a measurement result of a change with time of a current flowing to the high-pressure discharge lamp DL (hereinafter referred to as a "lamp current") (that is, lamp current waveform) in the case of using HCI-TC/E70W/NDL manufactured by OSRAM Corporation as the high-pressure discharge lamp DL.
  • Fig. 15(a) illustrates the case where duration of the starting operation P1 is relatively long and a temperature of each electrode (not shown) of the high-pressure discharge lamp DL sufficiently rises at start of the steady operation P3
  • Fig. 15(b) illustrates the case where duration of the starting operation P1 is relatively short and the temperature of each electrode of the high-pressure discharge lamp DL does not sufficiently rises at start of the steady operation P3.
  • the present invention intends to provide a high pressure discharge lamp lighting device and an illumination fixture that hardly cause going-out immediately after start of the steady operation.
  • a power converting circuit that appropriately converts power inputted from outside and outputs the power to a high-pressure discharge lamp and a control circuit that controls the power converting circuit are provided.
  • the control circuit continues a starting operation of controlling the power converting circuit so as to output a high voltage necessary for start of lighting of the high-pressure discharge lamp to the high-pressure discharge lamp for a predetermined starting period at least while the high-pressure discharge lamp is not lighted, and then, performs a determining operation of comparing an effective value of a voltage between both ends of the high-pressure discharge lamp with a predetermined start determining voltage; when an effective value of the voltage between both ends of the high-pressure discharge lamp is equal to or larger than the start determining voltage in a determining operation, performs the starting operation for the starting period and the determining operation again; and when the effective value of the voltage between both ends of the high-pressure discharge lamp is smaller than the start determining voltage in the determining operation, performs the starting
  • the high-pressure discharge lamp can be lighted again even if the high-pressure discharge lamp goes out in the starting operation after the determining operation in which the effective value of the voltage between both ends of the high-pressure discharge lamp is smaller than the start determining voltage and a temperature of each electrode of the high-pressure discharge lamp can be increased in the starting operation, as compared to the case where the steady operation is started immediately after the determining operation, the high-pressure discharge lamp hardly goes out immediately after start of the steady operation.
  • the control circuit detects the voltage between both ends of the high-pressure discharge lamp while controlling the power converting circuit so as to output a DC voltage to the high-pressure discharge lamp.
  • control circuit reverses a direction of the voltage outputted to the high-pressure discharge lamp in the determining operation for each determining operation.
  • a frequency of the voltage outputted from the power converting circuit to the high-pressure discharge lamp is not changed at least while the high-pressure discharge lamp is lighted.
  • the control circuit decreases duration of the starting operation performed before starting the steady operation as the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is lower.
  • the steady operation when it is assumed that the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is lower and discharge in the high-pressure discharge lamp becomes more stable, the steady operation can be started more rapidly.
  • the control circuit also compares the effective value of the voltage between both ends of the high-pressure discharge lamp with a predetermined stability determining voltage that is lower than the start determining voltage in the determining operation, and immediately starts the steady operation without performing the starting operation again when the effective value of the voltage between both ends of the high-pressure discharge lamp is smaller than the stability determining voltage.
  • the steady operation when it is assumed that the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is sufficiently low and discharge in the high-pressure discharge lamp becomes sufficiently stable, the steady operation can be started rapidly.
  • a power converting circuit that appropriately converts power inputted from outside and outputs the power to a high-pressure discharge lamp, and a control circuit that controls the power converting circuit are provided.
  • the control circuit continues a starting operation of controlling the power converting circuit so as to output a high voltage necessary for start of lighting of the high-pressure discharge lamp to the high-pressure discharge lamp for a predetermined starting period at least while the high-pressure discharge lamp is not lighted, and then, performs a determining operation of comparing an absolute value of a voltage between both ends of the high-pressure discharge lamp with a predetermined stability determining voltage in the state where the power converting circuit is controlled so as to output the DC voltage to the high-pressure discharge lamp; reverses a direction of the voltage outputted to the high-pressure discharge lamp in the determining operation for each determining operation; when the absolute value of the voltage between both ends of the high-pressure discharge lamp is equal to or larger than a stability determining voltage in at least one
  • the starting operation is inserted again at least once between the first determining operation in which the absolute value of the voltage between both ends of the high-pressure discharge lamp is smaller than the stability determining voltage and the steady operation, and a temperature of each electrode of the high-pressure discharge lamp can be increased in the second starting operation, as compared to the case where the steady operation is started immediately after the first determining operation, the high-pressure discharge lamp hardly goes out immediately after start of the steady operation. Further, as compared to the case where the direction of the voltage outputted to the high-pressure discharge lamp is made constant in all determining operations, since a temperature difference between the electrodes of the high-pressure discharge lamp is suppressed, the occurrence of half-wave discharge as a cause of the going-out can be prevented.
  • the voltage outputted from the power converting circuit to the high-pressure discharge lamp while the high-pressure discharge lamp is lighted is a DC voltage
  • the control circuit controls the power converting circuit so as to reverse the direction of the DC voltage outputted to the lighted high-pressure discharge lamp for each starting operation.
  • a ninth aspect of the invention includes the high pressure discharge lamp lighting device according to any of the first to eighth aspects of the present invention and a fixture main body holding the high pressure discharge lamp lighting device.
  • the control circuit performs the starting operation again before starting the steady operation of controlling the power converting circuit so as to keep lighting of the high-pressure discharge lamp.
  • the high-pressure discharge lamp can be lighted again even if the high-pressure discharge lamp goes out in the starting operation after the determining operation in which the effective value of the voltage between both ends of the high-pressure discharge lamp is smaller than the start determining voltage, and the temperature of each electrode of the high-pressure discharge lamp can be increased in the starting operation, as compared to the case where the steady operation is started immediately after the determining operation, the high-pressure discharge lamp hardly goes out immediately after start of the steady operation.
  • the control circuit since the control circuit reverses the direction of the voltage outputted to the high-pressure discharge lamp in the determining operation for each determining operation, as compared to the case where the direction of the voltage outputted to the high-pressure discharge lamp is made constant in all determining operations, a temperature difference between the electrodes of the high-pressure discharge lamp is suppressed Therefore, the occurrence of half-wave discharge as the cause of the going-out can be prevented.
  • the frequency of the voltage outputted from the power converting circuit to the high-pressure discharge lamp is not changed at least while the high-pressure discharge lamp is lighted, as compared to the case where the frequency of a voltage outputted from the power converting circuit to the high-pressure discharge lamp is changed while the high-pressure discharge lamp is lighted, going-out of the high-pressure discharge lamp can be prevented.
  • the control circuit decreases duration of the starting operation performed before starting the steady operation as the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is lower, when it is assumed that the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is lower and discharge in the high-pressure discharge lamp becomes more stable, the steady operation can be started more rapidly.
  • the control circuit since, in the determining operation, the control circuit also compares the effective value of the voltage between both ends of the high-pressure discharge lamp with the predetermined stability determining voltage that is lower than the start determining voltage, and immediately starts the steady operation without performing the starting operation again when the effective value of the voltage between both ends of the high-pressure discharge lamp is smaller than the stability determining voltage, when it is assumed that the effective value of the voltage between both ends of the high-pressure discharge lamp in the determining operation is sufficiently low and discharge in the high-pressure discharge lamp becomes sufficiently stable, the steady operation can be started rapidly.
  • the control circuit in starting lighting of the high-pressure discharge lamp, continues the starting operation of controlling the power converting circuit so as to output the high voltage necessary for start of lighting of the high-pressure discharge lamp to the high-pressure discharge lamp for the predetermined starting period at least while the high-pressure discharge lamp is not lighted, and then, performs the determining operation of comparing the absolute value of the voltage between both ends of the high-pressure discharge lamp with the predetermined stability determining voltage in the state where the power converting circuit is controlled so as to output the DC voltage to the high-pressure discharge lamp; reverses the direction of the voltage outputted to the high-pressure discharge lamp in the determining operation for each determining operation; when the absolute value of the voltage between both ends of the high-pressure discharge lamp is equal to or larger than the stability determining voltage in at least one of the current determining operation and the previous determining operation, performs the starting operation for the starting period and the determining operation again; and when the absolute value of the voltage between both ends of the high-pressure discharge lamp is smaller than the stability
  • the starting operation is inserted again at least once between the first determining operation in which the absolute value of the voltage between both ends of the high-pressure discharge lamp is smaller than the stability determining voltage and the steady operation, and the temperature of each electrode of the high-pressure discharge lamp can be increased in the second starting operation, as compared to the case where the steady operation is started immediately after the first determining operation, the high-pressure discharge lamp hardly goes out immediately after start of the steady operation. Further, as compared to the case where the direction of the voltage outputted to the high-pressure discharge lamp is made constant in all determining operations, the temperature difference between the electrodes of the high-pressure discharge lamp is suppressed, and the occurrence of half-wave discharge as the cause of the going-out can be prevented.
  • the control circuit controls the power converting circuit so as to reverse the direction of the DC voltage outputted to the lighted high-pressure discharge lamp for each starting operation, as compared to the case where the direction of the DC voltage outputted to the lighted high-pressure discharge lamp is made constant in all starting operations, the temperature difference between the electrodes of the high-pressure discharge lamp is suppressed. Therefore, the occurrence of half-wave discharge as the cause of the going-out can be prevented.
  • the control circuit 3 starts its operation (S1), continues the starting operation P1 for a predetermined starting period (S2) and then, controls each of the switching elements Q1 to Q4 of the power converting circuit 1 so as to output a DC voltage to the high-pressure discharge lamp DL to start the determining operation P2 (S3), compares the lamp voltage V1a (strictly speaking, an effective value, that is, an absolute value
  • the present embodiment is different from the conventional example in the following point. That is, when the lamp voltage V1a is smaller than the start determining voltage V1 in the determining operation P2 (Y at S4), the control circuit 3 does not immediately start the steady operation P3, but, as shown in Fig. 1 , performs the starting operation P1 again for a preparing period tp corresponding to the lamp voltage V1a in the determining operation P2 (S6) and then, starts the steady operation P3 (S7). As shown in Fig. 3 , as the lamp voltage V1a is lower, the preparing period tp is decreased.
  • the high-pressure discharge lamp DL can be lighted again even if the lamp DL goes out in the starting operation P1 after the determining operation P2, and a temperature of each electrode of the high-pressure discharge lamp DL can be increased in the starting operation P1, as compared to the case where the steady operation P3 is started immediately after the determining operation P2 as in the conventional example, the high-pressure discharge lamp DL hardly goes out immediately after start of the steady operation P3.
  • duration of the starting operation P1 before the steady operation P3 is decreased as the lamp voltage V1a is lower, when it is assumed that the lamp voltage V1a is lower and discharge in the high-pressure discharge lamp DL is more stable, the steady operation P3 can be started more rapidly.
  • a direction (polarity) of the lamp voltage V1a may be reversed for each determining operation P2. Reversal of the direction of the lamp voltage V1a can be performed, for example, by exchanging control of one pair of diagonally-located switching elements Q1, Q4 of the power converting circuit 1 with control of the other pair of diagonally-located switching element Q2, Q3.
  • Reversal of the direction of the lamp voltage V1a can be performed, for example, by exchanging control of one pair of diagonally-located switching elements Q1, Q4 of the power converting circuit 1 with control of the other pair of diagonally-located switching element Q2, Q3.
  • the starting operation P1 is not limited to those in the conventional example and, as shown in Fig. 4 , in the starting operation P1, the lamp voltage V1a may become an AC voltage having a frequency higher than the frequency in the steady operation P3. In an example in Fig. 4 , an amplitude of the lamp voltage V1a decreases with start of lighting of the high-pressure discharge lamp DL in the starting operation P1. Both of the cases shown in Figs. 1 and 4 , to prevent going-out of the high-pressure discharge lamp DL, it is desired that the starting operation P1 does not allow the frequency of the lamp voltage V1a to change at least while the high-pressure discharge lamp DL is lighted.
  • the starting operation P1 allows power that is 25% of rated power of the high-pressure discharge lamp DL or more to be outputted to the lighted high-pressure discharge lamp DL.
  • the control circuit 3 compares the lamp voltage V1a with the start determining voltage V1 as well as a predetermined stability determining voltage V2 ( ⁇ V1) that is lower than the start determining voltage V1 (S8). Then, when the lamp voltage V1a is equal to or larger than the start determining voltage V1, as in the conventional example, after the stopping operation P0 (S5), the starting operation P1 and the determining operation P2 are performed again.
  • the starting operation P1 is performed again (S6) as in the first embodiment, and then, the steady operation P3 is started (S7). Further, when the lamp voltage V1a is smaller than the stability determining voltage V2 (Y at S8), it is determined that the temperature of the electrodes of the high-pressure discharge lamp DL sufficiently rises and discharge in the high-pressure discharge lamp DL becomes stable, and the steady operation P3 is immediately started without performing the starting operation P1 (S7).
  • a polarity (direction) of the DC voltage to be outputted to the high-pressure discharge lamp DL after lighting of the high-pressure discharge lamp DL in the starting operation P1 and the polarity of the DC voltage to be outputted to the high-pressure discharge lamp DL in the determining operation P2 are reversed for each starting operation P1 and each determining operation P2 (S9).
  • Such polarity reversal can be performed, for example, by exchanging control of one pair of diagonally-located switching elements Q1, Q4 of the power converting circuit 1 with control of the other pair of diagonally-located switching element Q2, Q3.
  • such polarity reversal can be performed by exchanging control of the switching elements Q1, Q2 on an autotransformer AT side with each other and exchanging control of the switching elements Q3, Q4 on an inductor L1 side.
  • the above-mentioned polarity reversal can suppress the temperature difference between the electrodes of the high-pressure discharge lamp DL and prevent the occurrence of half-wave discharge as the cause of going-out, as compared to the case where the polarity of the DC voltage in the determining operation P2 is made constant and the polarity of the DC voltage in the starting operation P1 is made constant as shown in Fig. 8 .
  • the control circuit 3 when the absolute value
  • the control circuit 3 determines whether or not the absolute value
  • the starting operation P1 is inserted again between the first determining operation P2 in which the absolute value
  • the above-mentioned various high pressure discharge lamp lighting devices can be used in illumination fixtures 5 as shown in Fig. 9 to Fig. 11 , respectively.
  • the illumination fixtures 5 in Fig. 9 to Fig. 11 each include the power converting circuit 1, a fixture main body 51 that stores and holds the lamp voltage detecting circuit 2 and the control circuit 3 and a light body 52 that holds the high-pressure discharge lamp DL.
  • the illumination fixture 5 in Fig. 9 and the illumination fixture 5 in Fig. 10 each include an electric supply line 53 that electrically connects the power converting circuit 1 to the high-pressure discharge lamp DL. Since the above-mentioned various illumination fixtures 5 can be realized according to well-known techniques, detailed description thereof is omitted.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (9)

  1. Dispositif d'allumage de lampe à décharge haute pression, comprenant :
    un circuit de conversion de puissance (1) qui convertit une puissance appliquée par une source d'alimentation en courant continu (E) et délivre la puissance à une lampe à décharge haute pression (DL) ; et
    un circuit de commande (3) qui commande le circuit de conversion de puissance (1), dans lequel :
    lors du démarrage d'allumage de la lampe à décharge haute pression (DL), le circuit de commande (3) continue une opération de démarrage (P1) consistant à commander le circuit de conversion de puissance (1) de manière à délivrer une haute tension nécessaire pour le démarrage d'allumage de la lampe à décharge haute pression (DL) à la lampe à décharge haute pression (DL) pendant une période de démarrage prédéterminée au moins tant que la lampe à décharge haute pression (DL) n'est pas allumée,
    caractérisé en ce qu'après l'opération de démarrage (P1), le circuit de commande (3) effectue une opération de détermination (P2) consistant à comparer une valeur efficace d'une tension (V1a) aux bornes de la lampe à décharge haute pression (DL) à une tension de détermination de démarrage prédéterminée ;
    le circuit de commande (3) effectue l'opération de démarrage (P1) pendant la période de démarrage et l'opération de détermination (P2) de nouveau lorsque la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est supérieure ou égale à la tension de détermination de démarrage dans l'opération de détermination (P2) ; et
    le circuit de commande (3) effectue l'opération de démarrage (P1) de nouveau avant de démarrer une opération en régime permanent (P3) consistant à commander le circuit de conversion de puissance (1) de manière à maintenir l'allumage de la lampe à décharge haute pression (DL) lorsque la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est inférieure à la tension de détermination de démarrage dans l'opération de détermination (P2).
  2. Dispositif d'allumage de lampe à décharge haute pression selon la revendication 1, dans lequel, dans l'opération de détermination (P2), le circuit de commande (3) détecte la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) tout en commandant le circuit de conversion de puissance (1) de manière à délivrer une tension continue à la lampe à décharge haute pression (DL).
  3. Dispositif d'allumage de lampe à décharge haute pression selon la revendication 2, dans lequel le circuit de commande (3) inverse le sens de la tension délivrée à la lampe à décharge haute pression (DL) dans l'opération de détermination (P2) pour chaque opération de détermination (P2).
  4. Dispositif d'allumage de lampe à décharge haute pression selon l'une quelconque des revendications 1 à 3, dans lequel, dans l'opération de démarrage (P1), une fréquence de la tension délivrée par le circuit de conversion de puissance (1) à la lampe à décharge haute pression (DL) n'est pas changée au moins tant que la lampe à décharge haute pression (DL) est allumée.
  5. Dispositif d'allumage de lampe à décharge haute pression selon l'une quelconque des revendications 1 à 4, dans lequel, lorsque la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est inférieure à la tension de détermination de démarrage dans l'opération de détermination (P2), le circuit de commande (3) diminue la durée de l'opération de démarrage (P1) effectuée avant le démarrage de l'opération en régime permanent (P3) à mesure que la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) dans l'opération de détermination est plus basse.
  6. Dispositif d'allumage de lampe à décharge haute pression selon l'une quelconque des revendications 1 à 5, dans lequel le circuit de commande (3) compare également la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) à une tension de détermination de stabilité prédéterminée qui est inférieure à la tension de détermination de démarrage dans l'opération de détermination (P2), et démarre immédiatement l'opération en régime permanent (P3) sans effectuer de nouveau l'opération de démarrage (P1) lorsque la valeur efficace de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est inférieure à la tension de détermination de stabilité.
  7. Dispositif d'allumage de lampe à décharge haute pression, comprenant :
    un circuit de conversion de puissance (1) qui convertit une puissance appliquée par une source d'alimentation en courant continu (E) et délivre la puissance à une lampe à décharge haute pression (DL) ; et
    un circuit de commande (3) qui commande le circuit de conversion de puissance (1), dans lequel :
    lors du démarrage d'allumage de la lampe à décharge haute pression (DL), le circuit de commande (3) continue une opération de démarrage (P1) consistant à commander le circuit de conversion de puissance (1) de manière à délivrer une haute tension nécessaire pour le démarrage d'allumage de la lampe à décharge haute pression (DL) à la lampe à décharge haute pression (DL) pendant une période de démarrage prédéterminée au moins tant que la lampe à décharge haute pression (DL) n'est pas allumée,
    caractérisé en ce qu'après l'opération de démarrage (P1), le circuit de commande (3) :
    effectue une opération de détermination (P2) consistant à comparer une valeur absolue d'une tension (V1a) aux bornes de la lampe à décharge haute pression (DL) à une tension de détermination de stabilité prédéterminée dans l'état où le circuit de conversion de puissance (1) est commandé de manière à délivrer une tension continue à la lampe à décharge haute pression (DL) ;
    inverse le sens de la tension délivrée à la lampe à décharge haute pression (DL) dans l'opération de détermination (P2) pour chaque opération de détermination (P2) ;
    effectue l'opération de démarrage (P1) pendant la période de démarrage et l'opération de détermination (P2) de nouveau lorsque la valeur absolue de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est supérieure ou égale à la tension de détermination de stabilité dans au moins une opération parmi l'opération de détermination courante et l'opération de détermination précédente ; et
    démarre une opération en régime permanent (P3) consistant à commander le circuit de conversion de puissance (1) de manière à maintenir l'allumage de la lampe à décharge haute pression (DL) lorsque la valeur absolue de la tension (V1a) aux bornes de la lampe à décharge haute pression (DL) est inférieure à la tension de détermination de stabilité aussi bien dans l'opération de détermination courante que dans l'opération de détermination précédente.
  8. Dispositif d'allumage de lampe à décharge haute pression selon la revendication 7, dans lequel, dans l'opération de démarrage (P1), la tension délivrée par le circuit de conversion de puissance (1) à la lampe à décharge haute pression (DL) tant que la lampe à décharge haute pression (DL) est allumée est une tension continue, et
    le circuit de commande (3) commande le circuit de conversion de puissance (1) de manière à inverser le sens de la tension continue délivrée à la lampe à décharge haute pression (DL) allumée pour chaque opération de démarrage (P1).
  9. Appareil d'éclairage (5) comprenant le dispositif d'allumage de lampe à décharge haute pression selon l'une quelconque des revendications 1 à 8 et un corps principal d'appareil (51) contenant le dispositif d'allumage de lampe à décharge haute pression.
EP10195984.9A 2009-12-22 2010-12-20 Dispositif d'éclairage par lampe à décharge haute pression et accessoire d'illumination Not-in-force EP2339896B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009291315A JP2011134503A (ja) 2009-12-22 2009-12-22 高圧放電灯点灯装置及び照明器具

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EP2339896A2 EP2339896A2 (fr) 2011-06-29
EP2339896A3 EP2339896A3 (fr) 2014-12-31
EP2339896B1 true EP2339896B1 (fr) 2017-09-20

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3305352B2 (ja) * 1992-03-16 2002-07-22 松下電工株式会社 放電灯点灯装置
JP2004273172A (ja) * 2003-03-05 2004-09-30 Matsushita Electric Works Ltd 車両用放電灯点灯装置
JP2004303688A (ja) * 2003-04-01 2004-10-28 Matsushita Electric Works Ltd 放電灯点灯装置
JP5129652B2 (ja) * 2008-05-27 2013-01-30 パナソニック株式会社 放電灯点灯装置

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EP2339896A2 (fr) 2011-06-29
JP2011134503A (ja) 2011-07-07

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