JP4899967B2 - Discharge lamp lighting device, lighting fixture and lighting system - Google Patents

Description

  The present invention relates to a discharge lamp lighting device using a plurality of types of high-pressure discharge lamps as compatible lamps, a lighting fixture using the same, and a lighting system.

  Conventionally, as a high-pressure discharge lamp lighting device for lighting a high-pressure discharge lamp (HID lamp), a copper-iron type ballast has been mainly used. However, in recent years, electronic ballasts using many electronic components aimed at reducing the weight, size and function of ballasts are becoming mainstream. This electronic ballast will be briefly described below.

  FIG. 16 shows a block diagram of the electronic ballast. A DC power supply circuit section A including a rectifier circuit is connected to the AC power supply Vs, an inverter circuit section B capable of adjusting and controlling the power supplied to the discharge lamp is connected to the output terminal, and a discharge lamp DL is connected to the output terminal. Has been. The inverter circuit unit B converts the output of the DC power supply circuit unit A into a low-frequency AC voltage and supplies it to the discharge lamp DL, and controls the operation of the lighting circuit unit C according to the state of the discharge lamp DL. And a control circuit unit D for performing the above.

  In such a conventional lighting device, when lighting HID lamps having different rated powers, it is necessary to use a high-pressure discharge lamp lighting device suitable for the lamp to be lit. For this reason, when it is desired to change the light output in accordance with the application, it is necessary to replace the discharge lamp lighting device in addition to the lamp. For these reasons, the high-pressure discharge lamp lighting device has been desired to have a performance capable of lighting a plurality of HID lamps with rated power.

Therefore, Patent Documents 1 to 4 propose a high-pressure discharge lamp lighting device for loading a plurality of types of HID lamps, and Japanese Patent Application Laid-Open No. 2003-229289 (Patent Document 1) sets a predetermined tube voltage of the HID lamp. Means for determining the load type by measuring the time until the value exceeds the value, and in Japanese Patent Application Laid-Open No. 2005-310676 (Patent Document 2), means for determining the load type based on the transient change of the lamp voltage after starting the HID lamp. Furthermore, Japanese Patent Laid-Open No. 2006-302830 (Patent Document 3) discloses means for discriminating a load type from a plurality of determination criteria using a transient change in lamp voltage after the start of the HID lamp, and in addition, Japanese Patent Laid-Open No. 2006-73439. The gazette (Patent Document 4) discloses a means for discriminating a load type using a transient change in lamp voltage after starting the HID lamp and electrical characteristics after sufficiently stabilizing. To have.
JP 2003-229289 A JP 2005-310676 A JP 2006-302830 A JP 2006-73439 A

  Japanese Patent Application Laid-Open No. 2003-229289 (Patent Document 1) discloses various lamp discrimination methods, and the lamp discrimination is performed by the time until a certain characteristic reaches a predetermined value after starting the lamp. In this case, the lamp is lit without knowing the lamp type from when the lamp is started until it is determined. Usually, the lamp voltage is low immediately after the lamp is started because the lamp temperature is low and the vapor pressure of the inclusions in the lamp cannot be obtained sufficiently. In this low lamp voltage region, the discharge lamp lighting device generally outputs a constant current. The output current value needs to be set to a value that can appropriately heat the lamp body and the lamp electrode, but the value varies depending on the lamp power type because the dimensions of the lamp body and the lamp electrode are different. If this output current is too low, it takes time to heat the electrode, and during that time, thermionic emission from the electrode is insufficient, and a strong electric field is formed on the front surface of the electrode, resulting in intense sputtering by ions. This sputtering causes tungsten, which is an electrode material, to adhere to the lamp tube wall and cause blackening, leading to a decrease in lamp luminous flux. Further, when the current is insufficient, the peak value of the re-ignition voltage generated when the polarity of the supplied power is reversed becomes high, and when the voltage supplied from the lighting device is exceeded, the lamp is extinguished. On the other hand, if the current is too large, the lamp electrode is excessively heated, causing the electrode material to evaporate. As in the case of sputtering, the lamp tube wall is blackened, leading to a decrease in the lamp luminous flux. For this reason, the output current value after starting is set to an optimum value by checking the lamp life characteristics. However, in the method disclosed in Japanese Patent Application Laid-Open No. 2003-229289 (Patent Document 1), since the lamp power type is not known until the lamp is determined after the lamp is started, optimal power supply cannot be performed.

  On the other hand, it may be possible to set an intermediate value between the optimum values of a plurality of lamp types to be discriminated until the lamp is discriminated. Concerned. Furthermore, when there are more than three lamp types, or when the rated power difference between the lamps to be discriminated is large, even if the output current is set to the middle, the difference from the optimum value becomes large, and the life characteristics are greatly deteriorated. Become. In particular, when the lamp start is shortly after the last lamp extinguishment, that is, at the time of high temperature restart, there is a case where a current higher than the optimum value is supplied to a lamp that is already at a high temperature, and there is a problem that severe electrode consumption occurs.

  Japanese Patent Laying-Open No. 2005-310676 (Patent Document 2) discloses a method for discriminating a lamp power type in accordance with a transient change of a lamp. In this case as well, there is a problem that the lamp cannot be lit with the optimum power until the lamp is identified.

  Furthermore, Japanese Patent Laying-Open No. 2006-302830 (Patent Document 3) similarly discloses a method of performing discrimination based on a plurality of criteria when discriminating a lamp power type according to a transient change of a lamp. Specifically, a method is disclosed that uses the rate of change at two time points immediately after starting the lamp and immediately before reaching stable lighting. In this case, there is a concern that the lamp is not discriminated until the lamp is nearly stable, the time during which the lamp is not optimally lighted becomes long, and the life characteristics are worsened.

  In addition, Japanese Patent Application Laid-Open No. 2006-73439 (Patent Document 4) discloses a method for discriminating a load type using a transient change of a lamp voltage after starting an HID lamp and an electric characteristic after sufficiently stable. Has been. Also in this case, since the determination is not performed until the lighting of the lamp is sufficiently stabilized, there is a concern about deterioration of the lamp life characteristics. Furthermore, when the lamp is determined after the lamp has stabilized, if the lamp power is changed according to the determination result, the light output of the lighting device changes. There is also a problem that makes the user feel uncomfortable.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to enable optimum lamp lighting at the time of high temperature restart, in which electrodes are easily consumed, and to improve the lamp life characteristics. An object of the present invention is to provide a discharge lamp lighting device capable of discriminating the lamp type while maintaining it.

  In order to solve the above-described problems, the present invention provides a power conversion circuit that converts power from a DC power source and supplies power to a high-pressure discharge lamp, a lighting control circuit that controls power supplied to the power conversion circuit, and a discharge control circuit. A detecting means for detecting the electrical characteristics of the electric lamp by the detecting means, a determining means for determining the rated power of the discharge lamp from the electric characteristics detected from the detecting means, a means for measuring the time from the turn-off of the discharge lamp to the next lighting, A discharge lamp lighting device that includes a means for storing a determination result, and that targets a high-pressure discharge lamp of a plurality of rated power types as a load, and that is connected to any one of them to be lit. If the time is shorter than the predetermined time, the power supplied to the power conversion circuit is controlled based on the previous determination result, and the connected high-pressure discharge lamp is turned on.

  According to the present invention, the turn-off time from the turn-off of the discharge lamp to the next turn-on is measured, and when the turn-off time is shorter than a preset time, the discharge lamp is turned on based on the previous determination result. Further, it is possible to avoid lighting the discharge lamp with a supply power different from the optimum value at the time of high temperature restart, and it is possible to keep the lamp life characteristics favorable.

(Embodiment 1)
FIG. 1 shows a circuit diagram of Embodiment 1 of the present invention. The electrolytic capacitor C01 is applied with a DC voltage obtained by rectifying and smoothing a commercial AC power source using, for example, a boost chopper circuit. As shown in FIG. 2, this direct-current voltage is generally the lamp end-to-end voltage (no-load secondary voltage) V02 = about 300V, which is required for starting the HID lamp.

  The control power supply circuit 1 is composed of a series circuit of step-down resistors R01 and R02 and Zener diodes ZD1 and ZD2, and generates voltages Vcc1 and Vcc2 to be supplied to the control circuit.

  The step-down chopper circuit 2 includes a switching element Q01, a regenerative diode D01, an inductor L01, and a capacitor C02. When the switching element Q01 switches at a high frequency, the DC voltage accumulated in the electrolytic capacitor C01 is necessary for the lamp DL. Convert to electricity. The polarity inversion circuit 3 is composed of a full bridge circuit of switching elements Q02, Q03, Q04, and Q05. Under the control of the full bridge control circuit, the DC voltage of the capacitor C02 of the step-down chopper circuit 2 is several tens Hz to several hundreds Hz. Convert to low frequency. The igniter circuit 4 includes a pulse transformer and a pulse generation circuit, and generates a high-pressure pulse (about 3 to 5 kV) necessary for starting the lamp.

  The constant Wla circuit 5 detects the lamp power Wla by detecting the current value supplied from the constant voltage of the electrolytic capacitor C01 to the load side by the resistor R05, and converts it into an arbitrary voltage value by the amplifier circuit OP1, and the resistor R1. And converted into a DC voltage by a DC conversion circuit comprising a capacitor C1. The converted DC voltage value and the value obtained by converting the PWM signal output from the microcomputer M into the DC voltage value by the resistor R2 and the capacitor C2 are compared by the error amplifier OP2. The comparator CP2 compares the voltage value output by comparison with the triangular wave high-frequency signal generated by the high-frequency oscillation circuit 7, thereby generating a drive signal for the switching element Q01 of the step-down chopper circuit 2. A Zener diode connected to the output terminal of the constant WLa circuit 5 determines the maximum value of the output voltage of the error amplifier OP2.

  Further, the constant Ila circuit 6 controls the lamp current Ila at a low impedance immediately after the lamp DL is started. This circuit detects the current value flowing through the lamp DL by detecting the current value flowing through the lamp DL by the resistor R06 and calculating the difference between the detected value and the voltage value detected by the resistor R05. . That is, since the reference ground of this circuit is provided on the negative potential side of the electrolytic capacitor C01, the resistor R06 has not only the lamp current value but also the discharge current value from the electrolytic capacitor C01 detected by the resistor R05. In order to detect this, the current flowing through the lamp DL is detected by calculating the difference between the value detected by the resistor R05 and the value detected by the resistor R06 by the differential amplifier OP3.

  Next, the detected voltage is converted into a DC voltage by a DC conversion circuit composed of a resistor R3 and a capacitor C3, and a reference voltage value obtained by dividing the control power supply voltage Vcc1 is compared with a differential amplifier OP4, whereby a step-down chopper circuit. The second switching element Q01 is controlled.

  The high-frequency oscillation circuit 7 includes comparators CP1, CP2, CP3, a CR charge / discharge circuit, and the like, and oscillates a high-frequency signal for on / off control of the switching element Q01 of the step-down chopper circuit 2 The width is controlled to receive the outputs of the constant Wla circuit 5 and the constant Ila circuit 6 and realize the output characteristics of FIG. 3 or FIG.

  FIG. 3 shows the output characteristics when the lamp of the lighting circuit of this embodiment is in the initial start state. After the lamp is started, it is driven in a constant Ila region indicated by a dotted line in FIG. 3 until the lamp is first discriminated. The optimum value is 1.4 A for a 70 W lamp and 0.9 A for a 35 W lamp, whereas in this embodiment, 1.1 A, which is between both current values until the lamp is first determined. Lights on. After the lamp voltage rises, the operation shifts to a constant Wla operation, but the power value is determined according to the lamp discrimination result. The above-described constant Ila circuit 6 controls the constant Ila area of FIG. 3, and the constant Wla circuit 5 controls the constant Wla area.

  The discharge lamp discriminating circuit 8 detects the lamp voltage Vla of the discharge lamp DL and discriminates a plurality of types of discharge lamps. For example, it is composed of a general-purpose microcomputer M such as PIC12F675 (8-bit microcomputer with A / D conversion function / flash memory) manufactured by Microchip, and the voltage at the voltage dividing point of resistors R03 and R04 is monitored. A constant Wla region of Vla ≧ 60V in FIG. 3 is realized by detecting the voltage and varying the pulse width of the PWM signal output to the CR integrating circuit of the capacitor C2 and the resistor R2 according to the detected value. Is controlling. The PWM signal is output from the second pin of the microcomputer M. The first pin is a power supply terminal, and the eighth pin is a ground terminal. Furthermore, the 7th pin is set as an input, and reads the lamp voltage value obtained from the voltage across the capacitor C02.

  The discharge lamp discriminating circuit 8 also serves as a discrimination result holding unit and a turn-off time measuring unit 9. An electrolytic capacitor C6 is connected to the power supply terminal of the microcomputer M. If the control power supply voltage Vcc2 falls below a certain value after the power supply of the discharge lamp lighting device is cut off, the microcomputer M determines that the lamp is turned off and starts measuring the turn-off time. The mode is shifted to the power consumption mode, and the operation is continued with the electric charge accumulated in the electrolytic capacitor C6. The measurement of the lamp turn-off time continues until the lamp is sufficiently cooled and can be regarded as the first start. During this time, the microcomputer M continues to hold the previous lamp discrimination result.

  Next, a method for determining the rated power type of the lamp will be described.

  FIG. 13 shows the rising characteristics of the lamp voltage Vla after starting the lamps of the 35 W and 70 W lamps. FIG. 14 shows the time required from Vla = 30 V to Vla = 40 V for various 35 W and 70 W lamps. As can be seen from FIG. 14, it is possible to discriminate between the 35 W lamp and the 70 W lamp at about 6 seconds.

  The operation flow of the discharge lamp lighting device of this embodiment is shown in FIG. When power is supplied to the lighting device in step # 1, first, the measurement time from the previous power OFF (extinguishment) is checked to determine whether it is the initial start or restart (step # 2). If a sufficient time has passed since the last power-off (turned off) and it can be determined that the lamp is almost at room temperature, it is determined that it is the first start rather than a restart, and the lamp is determined in step # 4. The power control mode for is set and the lamp is started in step # 7. Thereafter, after starting confirmation (step # 10), lamp type determination (step # 13) is performed based on the transient change characteristic of the lamp voltage. In accordance with the result determined here, the lamp control is changed to stabilize the lighting of the lamp and record the lamp determination result (steps # 14 and # 15). The output characteristics of the lighting device at this time are as shown in FIG.

  On the other hand, if it is determined in step # 2 that the lamp is hot shortly after the previous power OFF (extinguishment), it is determined that the lamp is hot instead of the initial start, and the result determined at the previous lighting is determined. Reference is made (step # 3), and power control at the time of lamp rise is performed according to the result (steps # 5 and # 6). Further, the referenced lamp discrimination is continuously held. As a result, it is possible to avoid excessive input of electric power (current) when starting the lamp when the lamp is restarted at a high temperature, and it is possible to keep the lamp life characteristics favorable. The output characteristics of the lighting device at this time are as shown in FIG. When the previous determination result is 70 W, 1.4 A is selected as the optimum value, and when 35 W, 0.9 A is selected as the optimum value. In this manner, by referring to the previous determination result at the time of restart, it is possible to perform a constant Ila operation suitable for each lamp.

  When the lamp is turned off in step # 17, measurement of the lamp turn-off time is started in step # 18. The measurement of the extinguishing time and the determination result holding are performed until the lamp reaches substantially room temperature and can be regarded as a first start. In this way, the time required for the lamp to be sufficiently cooled even after the power supplied to the discharge lamp lighting device is cut off is operated by the extinguishing time measuring means and the discrimination result holding means operating. Sometimes, even when there is no power supply to the discharge lamp lighting device, the lamp can be optimally lit with reference to the previous determination result.

  Although it is possible to control the reference of the previous lamp determination result even at the initial start, it is necessary to provide a special means for holding the determination result over a long period of time, which increases the size of the lighting device. There is a problem that causes an increase in cost. In addition, in the case of the first start, if control is performed only with the result of the previous determination, when the lamp is replaced, a different lamp power may be input. Necessary. On the other hand, in the case of the present embodiment, the lamp power control at the time of high temperature restart that affects the lamp life characteristics is performed according to the previous determination result, so that the lamp life characteristics are kept good and the size is further reduced. An inexpensive discharge lamp lighting device with a lamp discrimination function can be provided.

(Embodiment 2)
Since the ballast in Embodiment 2 of the present invention is almost the same as that used in Embodiment 1, redundant description is omitted. In the present embodiment, a turn-off time measuring means and a determination result holding means 9 as shown in FIG. 6 are provided. The microcomputer M of the discharge lamp discriminating circuit 8 is set to analog input for the 3rd and 4th pins and to binary output for the 5th and 6th pins. In the case of 35 W, a voltage is applied to the capacitor C8 via the resistor R10. This voltage application is maintained while the lamp is lit. Thereafter, when the power source of the discharge lamp lighting device is cut off, the charge charged in the capacitor C7 or C8 is discharged through the resistor R7 or R8. The discharge time is determined by the capacitances of the capacitors C7 and C8 and the resistance values of the resistors R7 and R8. This discharge time is set to a length sufficient for the lamp to be turned off and cooled. Then, when the power of the discharge lamp lighting device is turned on, the previous discrimination result can be known by referring to the voltage of the capacitor C7 or C8, and the time from the previous extinction can also be determined by the voltage value level of the capacitor. I understand. In this case, the microcomputer M does not have to keep operating while holding the power supply as in the first embodiment.

(Embodiment 3)
Since the configuration of the discharge lamp lighting device according to Embodiment 3 of the present invention is the same as that used in Embodiment 1 or 2 (FIG. 1 or FIG. 6), redundant description is omitted. The operation flow of the lighting device of this embodiment is shown in FIG. Since this operation flow is almost the same as the flow shown in the first embodiment, a duplicate description is omitted. In the present embodiment, the flow is the same as that of the first embodiment in the case of the initial start, and the output characteristics are the same as those in FIG. On the other hand, at the time of restart, in steps # 5a and # 6a, the selection of the power supplied to the lamp is not switched based on only the previous lamp discrimination result, but from the previous power-off to the current power-on. The power supply to the lamp is set with reference to the turn-off time. The output characteristics in this case are as shown in FIG. T in the figure is the turn-off time. When the turn-off time is less than 60 seconds, the lamp is very hot, and the lamp current Ila that is input at the time of restarting is kept low. By doing so, the lamp life characteristics can be further improved.

(Embodiment 4)
Since the configuration of the discharge lamp lighting device according to the fourth embodiment of the present invention is almost the same as that used in the first embodiment, a duplicate description is omitted. In the present embodiment, a switch SW1 is provided as the discharge lamp attachment / detachment detection means 10 as shown in FIG. The switch SW1 is opened / closed according to the removal / attachment of the discharge lamp DL, and the opening / closing is monitored by an input terminal of the microcomputer M (set to the fifth pin in this case).

  FIG. 10 shows an operation flow of the lighting device. Since this operation flow is almost the same as the flow shown in the first embodiment, a duplicate description is omitted. In the present embodiment, when the attachment / detachment of the lamp is detected in step # 2a, the lamp determination is performed again regardless of the length of the turn-off time. This makes it possible to prevent the lamp power from being set erroneously with reference to the previous determination result when the lamp is detached during the extinguishing time measurement. That is, there is no problem of using the previous determination result as a high-temperature restart even though the newly installed lamp is cold.

(Embodiment 5)
Since the configuration of the discharge lamp lighting device in Embodiment 5 of the present invention is the same as that used in Embodiment 1 or 2 (FIG. 1 or FIG. 6), redundant description is omitted. FIG. 11 is an operation flow of the lighting device. In order to detect the attachment / detachment of the lamp as in the fourth embodiment, the electric characteristics of the lamp are used in the fifth embodiment. Specifically, if there is a large difference between the extinguishing time estimated from the lamp electrical characteristics at the time of restarting in step # 19 and the actually measured extinguishing time, it is determined that the lamp has been detached, and step # 20. The lamp is newly determined. In this case, unlike the fourth embodiment, a special lamp attachment / detachment detection unit is not required, and an inexpensive lighting device can be provided.

(Embodiment 6)
Since the configuration of the discharge lamp lighting device according to the sixth embodiment of the present invention is the same as that used in the first embodiment (FIG. 1), a duplicate description is omitted. FIG. 12 is an operation flow of the lighting device. After starting the lamp, it is checked in step # 2b whether the previous lamp discrimination result is held. If the hold is not performed, the lamp determination is performed from step # 4 without performing the restart determination of step # 2. As a result, when the lamp discrimination result cannot be held for some reason, it is possible to avoid a problem of supplying lamp power different from that of the lamp connected as a load, and to provide a highly reliable lighting device. .

  Thus, when the means for storing the previous determination result does not hold the previous determination result, a new determination is made after the lamp is lit, so that the discharge lamp lighting device is installed and the first lighting or Even when a sufficient time has passed since the lamp was turned on last time and the means for storing the previous determination result has stopped operating, no problem occurs.

(Embodiment 7)
FIG. 15 shows a structural example of a lighting fixture using the discharge lamp lighting device of the present invention. (A), (b) is an example applied to a spotlight, (c) is an example applied to a downlight. In the figure, 11 is an electronic ballast storing a circuit of a lighting device, and 12 is a high pressure discharge lamp. The lamp body 13 is a wiring. In any lighting fixture, a plurality of types of high-pressure discharge lamps such as 35 W and 70 W can be appropriately selected and mounted. A plurality of these lighting fixtures may be combined to construct an illumination system, and a plurality of different types of high-pressure discharge lamps may be used in combination depending on the required illuminance, emission color, design, and the like.

  By using the discharge lamp lighting device of the present invention in these lighting fixtures and lighting systems, it is possible to accurately determine the lamp power type and to light the lamp while maintaining good lamp life characteristics. As a result, the user can change the power type of the lamp according to the application, and can easily obtain the necessary light output according to the application.

It is a circuit diagram which shows the circuit structure of Embodiment 1 of this invention. It is a wave form diagram which shows the no-load secondary voltage of Embodiment 1 of this invention. It is a characteristic view which shows the output characteristic at the time of the lamp | ramp initial start of Embodiment 1 of this invention. It is a flowchart which shows operation | movement of Embodiment 1 of this invention. It is a characteristic view which shows the output characteristic at the time of the lamp restart of Embodiment 1 of this invention. It is a circuit diagram which shows the circuit structure of Embodiment 2 of this invention. It is a flowchart which shows operation | movement of Embodiment 3 of this invention. It is a characteristic view which shows the output characteristic at the time of the lamp | ramp restart of Embodiment 3 of this invention. It is a circuit diagram which shows the circuit structure of Embodiment 4 of this invention. It is a flowchart which shows operation | movement of Embodiment 4 of this invention. It is a flowchart which shows operation | movement of Embodiment 5 of this invention. It is a flowchart which shows operation | movement of Embodiment 6 of this invention. It is a characteristic view which shows an example of the lamp voltage rising characteristic at the time of starting. It is explanatory drawing which shows an example of a lamp classification discrimination method. It is a perspective view which shows the external appearance of the lighting fixture of this invention. It is a block diagram of the conventional lighting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control power supply circuit 2 Step-down chopper circuit 3 Polarity inversion circuit 4 Igniter circuit 5 Constant Wla circuit 6 Constant Ila circuit 7 High frequency oscillation circuit 8 Discharge lamp discrimination circuit 9 Light extinction time measurement means and discrimination result holding means 10 Discharge lamp attachment / detachment detection means

Claims (10)

A power conversion circuit for converting power from a DC power source to supply power to the high-pressure discharge lamp, a lighting control circuit for controlling the power supplied to the power conversion circuit, and detecting the electrical characteristics of the discharge lamp, and detecting means A plurality of rated powers, including a discriminating means for discriminating the rated power of the discharge lamp from the electrical characteristics detected from the above, a means for measuring the time from when the discharge lamp is extinguished until the next lighting, and a means for storing the previous discrimination result. This is a discharge lamp lighting device that targets various types of high-pressure discharge lamps and lights them by connecting one of them, and if the measured time is shorter than the preset time, A discharge lamp lighting device characterized by controlling the power supplied to the power conversion circuit and lighting a connected high-pressure discharge lamp. 2. The discharge lamp lighting device according to claim 1, wherein the preset time is a length in which the discharge lamp is cooled after being extinguished and becomes substantially stable. 3. The discharge lamp lighting device according to claim 1 or 2, wherein means for measuring a time from when the discharge lamp is extinguished until the next lighting and means for storing the previous determination result are supplied power to the discharge lamp lighting device. A discharge lamp lighting device that operates for a certain period of time even when the lamp is stopped. 4. The discharge lamp lighting device according to claim 3, wherein the time during which the means for measuring the time from the turn-off of the discharge lamp to the next turn-on and the means for storing the previous determination result is at least after the discharge lamp is turned off. A discharge lamp lighting device characterized in that it is long enough to be cooled and become almost stable. The discharge lamp lighting device according to any one of claims 1 to 4, wherein when the measured time from the turn-off of the discharge lamp to the next turn-on is shorter than a predetermined time, the previous determination result and the measurement time A discharge lamp lighting device that controls power supplied to the discharge lamp until the discharge lamp is lit stably according to the above. It is a discharge lamp lighting device in any one of Claims 1-5, Comprising: Furthermore, it has a means to detect attachment / detachment of a discharge lamp, and when the said means detects attachment / detachment of a discharge lamp, from the extinction of a discharge lamp. A discharge lamp lighting device characterized by detecting the electrical characteristics of a discharge lamp by a detection means regardless of the time until the next lighting, and determining the rated power of the discharge lamp from the detected electrical characteristics. 7. The discharge lamp lighting device according to claim 6, wherein the means for detecting the attachment / detachment of the discharge lamp detects the attachment / detachment from the electric characteristic detected by the electric characteristic detecting means for the discharge lamp. . The discharge lamp lighting device according to any one of claims 1 to 7, wherein when the means for storing the previous determination result does not hold the previous determination result, the electric characteristic of the discharge lamp is detected by the detection means. A discharge lamp lighting device characterized by detecting and determining a rated power of a discharge lamp from detected electrical characteristics. A lighting fixture comprising the discharge lamp lighting device according to any one of claims 1 to 8. The lighting system containing the discharge lamp lighting device or lighting fixture in any one of Claims 1-9.

Images