JP2005158365A - Discharge lamp lighting device and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device which surely shuts off electric power even when a lamp in an discharge state in an outer tube is a load, and also surely shuts off electric power even when a discharge is continued in other parts than the lamp, between the secondary wiring of a lighting device. <P>SOLUTION: The discharge lamp lighting device has a means for detecting a change of irregular electrical characteristics in a discharge state in between a secondary output terminal and a lighting circuit including a lamp in the lighting device, and shuts off its output in response to the output of the detecting means. Particularly, the discharge lamp lighting device detects the discharge state in which the discharge lamp repeatedly dies out and restarts in a sealed arc tube in an outer tube of the high pressure discharge lamp, or the discharge state in which the lamp does not die out while continuing arc discharge at a lamp voltage or a lamp current different from that in normal lighting, and the lighting device shuts off its output. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a discharge lamp lighting device for lighting a HID lamp, and a lighting fixture using the same.

  In recent years, lighting devices for HID lamps are required to be smaller, lighter, and more functional, and are shifting from conventional copper-iron type to electronic type. Usually, an electronic lighting device for an HID lamp adopts a rectangular wave lighting method in order to avoid an acoustic resonance phenomenon. In the rectangular wave lighting method, the current limiting of the lamp current is performed in the high frequency region to reduce the size of the current limiting element, while the polarity of the high frequency current is inverted at a low frequency where no acoustic resonance phenomenon occurs. By supplying a rectangular wave current having only a low-frequency component from which the high-frequency component has been removed by a filter circuit to the lamp, stable lamp lighting can be achieved while avoiding an acoustic resonance phenomenon.

  FIG. 6 shows a block diagram of the electronic lighting device. A DC power supply circuit 1 including a rectifier circuit is connected to the AC power supply Vs, and an inverter circuit 2 that generates a low-frequency rectangular wave is connected to an output end of the DC power supply circuit 1. An output end of the inverter circuit 2 Is connected to the lamp La.

  FIG. 7 shows a circuit diagram more specifically showing the block diagram of FIG. The DC power supply circuit 1 includes a rectifier circuit DB, a step-up chopper circuit including an inductance L0, a diode D0, a switching element Q0, and a control circuit 3, and a capacitor C0. The AC voltage of the AC power supply Vs is rectified and smoothed into a DC voltage. It has the function to do. Since the boost chopper circuit is a general technique, description thereof is omitted.

  The inverter circuit 2 includes switching elements Q1 to Q4, an inductance L1, a capacitor C1, driver ICs (for example, IR2308 manufactured by IR) 4 and 5, and a control circuit 6. The control circuit 6 detects the lamp voltage by the resistors R1 to R4, and switches the switching element Q1 according to the detected lamp voltage based on a preset lamp voltage / lamp power correlation table (hereinafter referred to as V-W table). Execute Q4 ON / OFF control and supply appropriate power to the lamp.

FIG. 8 shows a time chart when the switching elements Q1 to Q4 are lit. The switching elements Q1 and Q2 operate at a low frequency of several tens to several hundreds Hz, and the switching elements Q3 and Q4 operate at a high frequency of several tens KHz, so that a current I _L1 as shown in FIG. 9 flows through the inductance L1. Further, as shown in FIG. 9, a substantially rectangular wave current such as Ila from which the high frequency component of I _L1 is removed by the capacitor C1 flows through the lamp La.
As described above, the inverter circuit has both a function of limiting the lamp current and a function of supplying a rectangular wave current from which a high-frequency component has been removed to the lamp.

Here, the control circuit 6 may use a microcomputer. In this case, the lamp voltage is recognized as a lamp voltage by a value obtained by A / D converting the voltage divided by the resistors R1 to R4 by the microcomputer. That is, in order to detect the lamp voltage, the absolute value of the difference between the both-ends voltage V _R2 of the resistor _R2 and the both-ends voltage V _R4 of the resistor R4 can be recognized as the lamp voltage value.

  In general, an electronic lighting device is equipped with an igniter circuit that generates a high voltage pulse voltage for starting the lamp. In this lighting device, the igniter circuit is composed of switching elements Q1, Q2, an inductor L2, and a capacitor C2. Constitute. Hereinafter, the operation of the igniter circuit when the lamp is started or when the lamp is not connected to the output terminal of the lighting device (hereinafter, these states are collectively referred to as a no-load state) will be described.

  The inductance L2 and the capacitor C2 connected in series resonate when a voltage is applied at a certain frequency f1. Here, f1 is set to several tens KHz to several hundreds KHz in consideration of the operation function of the switching elements Q1, Q2, the size of the inductor L2, the capacitor C2, and the like.

  The switching elements Q1 and Q2 are alternately turned ON / OFF as in the pulse generation section of FIG. 10, and when the switching element Q1 is ON, the output voltage of the DC power supply circuit is composed of the switching element Q1, the inductance L2, and the capacitor C2. Apply to closed circuit. When the switching element Q2 is ON, the electric charge stored in the capacitor C2 is discharged to the closed circuit including the capacitor C2 itself, the inductance L2, and the switching element Q2. By repeating the above operation in response to the signal from the driver IC 4, a high voltage resonance pulse voltage is generated at the connection point between the inductance L 2 and the capacitor C 2. This resonance pulse voltage is applied to one end of the lamp La, causing dielectric breakdown between the electrodes inside the lamp and starting the lamp.

  Although not directly related to the igniter operation, the switching elements Q3 and Q4 are also operated as shown in FIG. 10 in the pulse generation period in order to form a current circuit after starting the lamp.

The igniter operation is provided with an intermittent period in which the operation is stopped for several hundreds of milliseconds after the pulse generation period has continued for several tens of milliseconds in consideration of the startability of the lamp and the burden on the lamp electrode. Further, in order to determine whether the lamp is turned on, the rectangular wave operation shown in FIG. 8 is provided as a Vla discrimination period only for a half period after a pulse generation period of several tens of ms.
The operation of the above igniter circuit is controlled using the control circuit 6 as in the inverter circuit operation.

  Next, the inverter circuit operation when the lamp is lit in the control circuit 6 and the igniter operation when there is no load will be sequentially described with reference to the flowchart of FIG.

  The flow of no-load operation and the flow of the rectangular wave output operation after starting the lamp are as follows: (1) Start, (2) No load, (3) First half-wave cycle, (4) Second half-wave cycle Separate.

  First, after starting the lighting device in step 1-1, in step 2-1, a signal for igniting the circuit is output to the driver ICs 4 and 5 when there is no load. In order to read the lamp voltage Vla1 in step 2-2, a signal for outputting a rectangular wave is output to the driver IC, the lamp voltage Vla1 is read, and no load is determined in step 2-3. The no-load determination is performed by comparing a preset voltage threshold Vmax and the lamp voltage Vla1, and it is determined that there is no load when Vla1> Vmax. At this time, if it is determined that there is no load, the process proceeds to step 2-1, and if it is determined that the lamp is started, the process proceeds to step 2-4. In step 2-4, a V-W table dedicated for immediately after starting the lamp is read, and target values W1 and W2 for the current limiting operation in the first half-wave cycle and the second half-wave cycle are set.

  In step 3-1, while outputting a signal corresponding to the set current limiting operation target value W1 to the driver IC 5, the lamp voltage is read as Vla1 in step 3-2. In step 3-3, the same no-load determination as in step 2-3 is performed. If it is determined that no-load occurs and no-load occurs, the process proceeds to step 2-1. If lighting is continued, it will transfer to step 3-4. In step 3-4, the current limiting operation target value W1 of the next first half-wave cycle is read from the V-W table and set in accordance with Vla1. In step 3-5, the first half-wave cycle operation is completed, and a polarity inversion signal is output to the driver ICs 4 and 5.

  In step 4-1, the ramp voltage is read as Vla2 in step 4-2 while outputting a signal corresponding to the set current limiting operation target value W2 to the driver IC5. In step 4-3, a no-load determination is made such that no load is recognized when Vla2> Vmax. If it is determined that there is no load, etc., the process proceeds to step 2-1. If the lighting is continued, the process proceeds to step 4-4. In step 4-4, the current limit operation target value W2 of the next second half-wave cycle is read from the V-W table and set in accordance with Vla2. In Step 4-5, the second half-wave cycle operation is completed, and a polarity inversion signal is output to the driver ICs 4 and 5, and the process proceeds to Step 3-1. Thereafter, the above operation is repeated.

  In general, a high-pressure discharge lamp tends to increase the lamp voltage as the lighting time elapses from the beginning of lighting. Normally, in the case of a copper-iron type lighting device, when the lamp voltage increases in this way, the re-ignition voltage of the lamp increases, so that the lighting cannot be maintained and the lamp is extinguished.

  On the other hand, in the electronic lighting device, the re-ignition voltage is not generated even at the end of the lamp life compared to the copper-iron lighting device, so that it is difficult for the lighting device to disappear. In this respect, the lamp life was also extended. However, since the lamp does not go out, the burden on the lamp is larger than that of the copper-iron type lighting device, the arc tube inside the lamp is deteriorated, the hermeticity of the sealed portion of the arc tube is lowered, and the inside of the arc tube A so-called leak may occur in which the starting rare gas flows out into the vacuum outer tube. When a starting pulse voltage is applied to such a leaky high-pressure discharge lamp, an arc discharge occurs between the lamp electrode and a conductor of another potential (hereinafter referred to as an outer tube discharge). When the discharge in the tube continued, the lamp base was overheated and could melt, for example, when the base was made of resin. This outer discharge in the outer tube may occur in the copper iron type lighting device as well.

  As countermeasures against such discharge in the outer tube, nitrogen gas is sealed in the outer tube to eliminate vacuum, or a current fuse is placed in the lamp base, and the current fuse is blown by overcurrent to cut off the supplied power Is known (Japanese Patent No. 3126300). However, when nitrogen gas is sealed in the outer tube, there is a negative effect such as a decrease in lamp efficiency compared to the vacuum state. When a current fuse is used, it takes a long time to blow out depending on the overcurrent current value. In some cases, the power supply cannot be reliably shut off during the discharge in the outer tube.

  In addition, in the conventional high pressure discharge lamp lighting device having an igniter circuit, damage to the secondary wiring of the lighting device or incomplete connection (for example, forgetting connection) between the lamp and the secondary side wire should occur. Since the high-voltage pulse voltage generated in the igniter is about 3 to 5 KV, when a cable such as a VVF line is used for the secondary side wiring, the thickness of the insulator covering the conductor of the cable is about 1.0 mm. If this is the case, dielectric breakdown may occur between adjacent conductors and discharge may occur.In such a state, the lamp is in a state similar to that when the lamp is started. Since the same level of power is supplied between the conductors, there is a risk that the discharge will continue between the conductors.

  Therefore, in order to avoid such inconvenience, as described above, even when a failure occurs in the power supply path to the lamp, the dielectric breakdown is not caused between the conductors (the discharge is continued even if the dielectric breakdown occurs). In order to reduce the energy of the high voltage pulse, Japanese Patent Application No. 2003-162606 has taken measures to provide an intermittent interval for generating the high voltage pulse voltage.

However, in the above countermeasures, in the unlikely event that dielectric breakdown occurs between the conductors and power is supplied from the lighting device, the lighting device does not have a means to actively stop power supply. There is a possibility that the supply will continue, and because the energy of the high-pressure pulse is reduced, if the normal lamp is connected to the secondary side of the lighting device, but it is a lamp with poor startability, dielectric breakdown will occur. There was a possibility that it would be difficult to wake up.
Japanese Patent No. 3126300

  The present invention has been devised to solve the above-described problems, and the purpose of the present invention is to reliably cut off the power supply even when the lamp in the discharge state in the outer tube becomes a load, An object of the present invention is to provide a discharge lamp lighting device capable of reliably shutting off power supply even when discharge continues in a portion other than a lamp between secondary wirings of the lighting device.

  In the high pressure discharge lamp lighting device of the present invention, in order to solve the above problems, the discharge state between the tube lamp circuit including the lamp from the secondary output end of the discharge lamp lighting device, the discharge It is characterized by comprising means for detecting irregular electrical characteristic changes, and stopping or reducing the output of the lighting device in accordance with the output of the detection means.

  ADVANTAGE OF THE INVENTION According to this invention, when discharge continues in parts other than a lamp | ramp between the secondary side wiring of a lighting device, an electric power supply can be stopped or reduced reliably. Moreover, even if the lamp in the discharge state in the outer tube becomes a load, the power supply can be reliably stopped or reduced.

  According to a preferred embodiment of the present invention, in the basic circuit configuration of FIG. 7 and the basic operation of FIG. 11, the control circuit 6 includes a processing step in the first half wave cycle and / or the second half wave cycle. By newly adding a process flow that can detect the characteristics of the lamp voltage or lamp current in the in-tube discharge state, the discharge state in the outer tube is detected, and the circuit operation is stopped or the output is reduced.

  Here, in order to detect the discharge state in the outer tube, for example, a means for detecting the value of the lamp voltage or lamp current to detect the extinction of the high pressure discharge lamp and a means for counting the number of extinctions are provided. When the specified number of times is exceeded, the lighting operation is stopped or the output is reduced. Alternatively, it comprises means for detecting the value of the lamp voltage or lamp current and means for counting the number of times the detected value rises and falls with respect to the set threshold value, and stops the lighting operation when the number of times exceeds a specified number. Reduce output. Or a means for detecting the value of the lamp voltage or lamp current and a means for counting and summing the duration or number of times that the detected value is less than or equal to the set threshold value (or greater than or equal to the threshold value). When the number of times exceeds the set value, the lighting operation is stopped or the output is reduced.

  Hereinafter, the principle of the present invention will be described. When the arc tube breaks for some reason in the HID lamp and a discharge state occurs in the outer tube, lamp voltage and current waveforms as shown in FIGS. 12 to 14 are observed. The waveforms of the lamp voltage Vla and the lamp current Ila in the figure are measured at the output end of the test ballast. The test lamp used was a CDM-T150W outer tube discharge state lamp manufactured by Philips, and a rectangular wave lighting type electronic ballast (MHC1501 / 24CK-2E manufactured by Matsushita Electric Works) was used as a test ballast.

In the state of FIG. 12, a steep voltage waveform (re-ignition voltage) is observed immediately after the polarity reversal of the lamp voltage waveform, and the lamp current is steep at the moment when the re-ignition voltage of the lamp voltage disappears immediately after the polarity reversal. A current waveform (overshoot current) was observed. In this state, arc discharge in the lamp was difficult to stabilize, and it went off and restarted repeatedly.
In the state of FIG. 13, half-wave discharge is generated in the lamp, and the arc discharge tends to continue as compared with the state of FIG.
In addition, in the states shown in FIGS. 12 and 13, the lamp voltage was not kept constant but was fluid, in addition to the features listed above.

  The state shown in FIG. 14 was observed when the discharge in the outer tube occurred at the root of the lamp having the shortest distance between the different poles in the lamp, and the arc discharge continued most stably. The lamp voltage was much higher than the rated lamp voltage. That is, this state is a discharge state in which the arc discharge is stably continued in a state where the lamp voltage or the lamp current is different from the waveform or value at the time of normal lighting, and the lamp does not go out.

  In the embodiment described below, attention is paid to the phenomenon peculiar to the discharge in the outer tube, and the lighting device is controlled by detection and the power supply to the lamp is cut off.

  FIG. 1 shows the operation of the first embodiment of the present invention. Among the discharge states in the outer tube, the state represented by FIG. 12 is characterized in that arc discharge is difficult to stabilize, disappears, and restarts repeatedly. This embodiment positively detects the change in electrical characteristics of the lamp in the above state. Specifically, the control circuit 6 is provided with a function of counting the number of times of extinction only when the lamp is extinguished after starting, and stopping the operation of the lighting device when a certain number of times is reached.

  That is, the number of times is counted when it is determined that there is no load in step 3-3 or step 4-3 in FIG. Then, when the number of times reaches a certain threshold A, the circuit operation is stopped, that is, the signal to the driver IC is stopped.

  Specifically, as shown in FIG. 1, when it is determined that there is no load in step 3-3, the number of times of extinction is counted up in step 3-3a. If the number of disappearances is less than the threshold value A in step 3-3-b, the process proceeds to step 2-1, similarly to FIG. When the number of times of extinction reaches the threshold value A in step 3-3b, the circuit operation is stopped in stop step EXIT.

  If it is determined in step 4-3 that there is no load, the number of times of extinction is counted up in step 4-3-a. If the number of disappearances is less than the threshold value A in step 4-3-b, the process proceeds to step 2-1, similarly to FIG. When the number of extinctions reaches the threshold value A in step 4-3-b, the circuit operation is stopped in stop step EXIT.

  FIG. 2 shows the operation of the second embodiment of the present invention. Among the discharge states in the outer tube, in the state represented by FIGS. 12 and 13, the discharge may continue even though the arc discharge is unstable. In such a case, there is a feature that the value of the lamp voltage fluctuates up and down. This embodiment positively detects the change in electrical characteristics of the lamp in the above state.

  After starting the lamp, the control circuit 6 reads the lamp voltage in each of the first half wave cycle and the second half wave cycle. The number of times when the lamp voltage Vla1 read in the first half-wave cycle is higher than a certain threshold value Vref1 and the lamp voltage Vla1 read after that is lower than the threshold value Vref1 is counted. That is, the flow of counting the number of times Vla1 that is read every period changes up and down with respect to a certain threshold value Vref1 and stopping the circuit operation when the number of times reaches a certain number of times B to Step 3-2. Provide between 5 and 5. By providing the same flow also in the second half-wave cycle, it is possible to detect the fluctuation of the lamp voltage more reliably.

  Specifically, as shown in FIG. 2, the lamp voltage Vla1 read in step 3-2 is compared with the set threshold value Vref1. When Vla1> Vref1, flag1 = 1 is set. Only when Vla1 detected in the first half-wave cycle is Vla1 <Vref1 and flag1 = 1 has already been established, the count value of the Vla1 fluctuation count is increased, and the predetermined number of times the Vla1 fluctuation count is present. When B is reached, the circuit operation is stopped. Note that when the value of the Vla fluctuation number is increased, the flag1 is reset to 0.

  Thereby, the fluctuation of the lamp voltage can be detected, and the value of the lamp voltage fluctuates up and down in a state where the discharge is continued while the arc discharge is unstable as represented by FIG. 12 and FIG. The discharge state in the outer tube can be detected by capturing the feature.

  By the way, the detection function can also be used for the purpose of detecting a discharge when a discharge occurs in a portion other than the lamp between the secondary wirings of the lighting device. For example, when a cable is used for the secondary side wiring, a discharge may occur between the conductors of the cable due to the high voltage pulse voltage generated by the lighting device when the conductor film is damaged. At this time, the voltage between the secondary side wirings fluctuates up and down as shown in FIG. Note that FIG. 15 uses a two-wire VVF wire as the secondary wiring, and the high voltage pulse voltage is applied in a state where the distance between the two wires is extremely close without specially treating the tip to be connected to the lamp. In this state, dielectric breakdown occurs, and the lighting device determines that the lamp is lit and supplies power.

  In other words, in the same way as the above countermeasures against discharge in the outer tube, by detecting the fluctuation of the voltage between the secondary side wirings, it is possible to detect the discharge generated between the secondary side wirings other than the lamp, and the electric power after the detection Can be cut off.

  FIG. 3 shows the operation of the third embodiment of the present invention. In the discharge state in the outer tube, in the state represented by FIG. 13, the discharge may be continued while the output in the lighting state is in a half-wave state. In this embodiment, the half-wave state time is counted, and the circuit operation is stopped when a certain set time or more is reached. The comparison with the set time is characterized in that the comparison is made with the accumulated time, not with the time during which the half-wave state has continued.

  Specifically, as shown in FIG. 3, a processing unit for comparing the ramp voltages Vla1 and Vla2 read in each half-wave cycle is inserted between steps 4-2 to 4-5 in FIG. . If the voltage difference between Vla1 and Vla2 is greater than a certain value, it is recognized as half-wave discharge, and the count value of the number of half-waves is increased. When the number of half-waves reaches a set value C, the circuit operation is stopped. The set value of the number of half-waves is calculated from the integration time of the half-wave state until the circuit operation is stopped. That is, half-wave detection is performed by time, but determination is performed by the number of times inside the control circuit 6.

  FIG. 4 shows the operation of the fourth embodiment of the present invention. Among the discharge states in the outer tube, the output of the lighting device may continue at a low lamp voltage or a high lamp voltage in the states represented by FIG. 12, FIG. 13, and FIG. In this embodiment, the circuit operation is stopped when the output of the lighting device is continued at a low lamp voltage or a high lamp voltage.

  A detection function when the state where the lamp voltage Vla1 detected in the first half-wave cycle continues below a certain set value Vlow and a detection function when a state where Vla1 continues above a certain set value Vhigh are provided. Here, Vlow <Vhigh. Even in the detection of the low lamp voltage or the high lamp voltage, the control circuit 6 determines the number of times.

  Specifically, as shown in FIG. 4, the number of times of low Vla1 and the number of times of high Vla1 are respectively set between steps 3-2 and 3-5 with respect to the lamp voltage Vla1 read in step 3-2 of FIG. The circuit operation is stopped when each count reaches a set value D or E. The set value of the number of times is calculated from the duration of the low lamp voltage and the high lamp voltage until the circuit operation is stopped. By providing the same flow in the second half-wave cycle, it is possible to more reliably detect the low lamp voltage and the high lamp voltage state.

  The detection functions of the third and fourth embodiments may be erroneously recognized as a lamp in a discharge state in the outer tube when the discharge immediately after starting the lamp is unstable even if it is a normal lamp. Therefore, a mask function is added so that each detection is not performed for a certain time immediately after the lamp is started. Similar to the above embodiment, the predetermined time immediately after the lamp is started is determined by a certain number of times inside the control circuit 6. As a specific example, the mask function for the half-wave state of the third embodiment is shown in FIG.

  A mask counter is provided immediately before the flow for comparing Vla1 and Vla2, and the mask counter is set to pass through the flow of the half-wave counter until it reaches a certain set value F. The set value of the mask counter is calculated from the masking time.

  In the first to fifth embodiments, the lamp voltage is read in order to detect a change in the electric characteristics of the lamp, but this detection may naturally be performed using other lamp electric characteristics, for example, a lamp current.

  Moreover, it becomes possible to detect the discharge state in the outer tube more reliably by mounting the detection function and the mask function of the first to fifth embodiments in combination.

  The circuit of the lighting device of Examples 1 to 5 may be any circuit that can supply power to the lamp, and may be a copper-iron type, an electronic type or a rectangular wave lighting type, or a high-frequency lighting type. good.

  The present invention can be used in lighting equipment for offices, stores, and general homes.

It is a flowchart which shows the principal part operation | movement of Example 1 of this invention. It is a flowchart which shows the principal part operation | movement of Example 2 of this invention. It is a flowchart which shows the principal part operation | movement of Example 3 of this invention. It is a flowchart which shows the principal part operation | movement of Example 4 of this invention. It is a flowchart which shows the principal part operation | movement of Example 5 of this invention. It is a block diagram which shows schematic structure of the conventional electronic lighting apparatus. It is a circuit diagram which shows the specific structure of the conventional electronic lighting device. It is a wave form diagram which shows the switching operation | movement of the inverter circuit of the conventional electronic lighting device. It is an operation | movement waveform diagram of the load current of the inverter circuit of the conventional electronic lighting device. It is operation | movement explanatory drawing from the time of starting of the conventional electronic lighting device to the time of lighting. It is a flowchart which shows the whole operation | movement of the conventional electronic lighting device. FIG. 6 is a waveform diagram of a lamp voltage and a lamp current in a discharge state in the outer tube. FIG. 6 is a waveform diagram of a lamp voltage and a lamp current in a discharge state in the outer tube. FIG. 6 is a waveform diagram of a lamp voltage and a lamp current in a discharge state in the outer tube. It is a wave form diagram which shows the mode of the fluctuation | variation of the voltage between secondary side wiring.

Explanation of symbols

3-3a Number of times of disappearance counting section 3-3b Number of times of disappearance determination section

Claims (11)

A discharge state between a tube lamp circuit including a lamp from a secondary output end of the lighting device, the device including a means for detecting irregular electrical characteristic change of the discharge, and the lighting device according to the output of the detection means A discharge lamp lighting device characterized in that the output of the lamp is stopped or reduced. The discharge state occurs in the outer tube of the high-pressure discharge lamp and in the sealed arc tube, and includes means for detecting irregular electrical characteristic changes of the high-pressure discharge lamp during the discharge, and according to the output of the detection means A discharge lamp lighting device characterized in that output to a high-pressure discharge lamp is stopped or reduced. The discharge lamp lighting device according to claim 2, wherein the discharge state is a state in which the extinction and the restart are repeated. The discharge state according to claim 2 is a discharge state in which arc discharge is stably continued in a state where the lamp voltage or lamp current is different from the waveform or value at the time of normal lighting, and the lamp does not go out. Discharge lamp lighting device. 4. The device according to claim 3, comprising means for detecting the extinction of the high-pressure discharge lamp by detecting the value of the lamp voltage or lamp current, and a means for counting the number of extinctions, and stops the lighting operation when the number of extinctions exceeds a specified number. Or the discharge lamp lighting device characterized by reducing an output. 5. The lighting device according to claim 4, comprising means for detecting the value of the lamp voltage or lamp current, and means for counting the number of times that the detected value rises and falls with respect to a set threshold value, and the lighting operation is performed when the number of times exceeds a specified number. The discharge lamp lighting device characterized by stopping the output or reducing the output. 7. The discharge lamp lighting device according to claim 5, wherein the lighting device supplies an alternating current output to the lamp, and detects the value of the lamp voltage or the lamp current with both positive and negative polarities. The means for detecting half-wave discharge of the high-pressure discharge lamp and means for integrating and counting the detected duration or number of half-wave discharges according to claim 3 or 4, wherein the duration or number of half-wave discharges is A discharge lamp lighting device characterized by stopping a lighting operation or reducing an output when a set value is exceeded. 5. The means according to claim 3 or 4, comprising means for detecting the value of the lamp voltage or lamp current, and means for integrating and counting the duration or number of times when the detected value is not more than a set threshold, A discharge lamp lighting device characterized in that the lighting operation is stopped or the output is reduced when the number of times exceeds a set value. 5. The method according to claim 3, comprising means for detecting a value of the lamp voltage or lamp current, and means for integrating and counting the duration or number of times when the detected value is equal to or greater than a set threshold value. A discharge lamp lighting device characterized in that the lighting operation is stopped or the output is reduced when the number of times exceeds a set value. The lighting fixture incorporating the lighting device in any one of Claims 1-10.

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