JP5001694B2 - Discharge lamp lighting device and lighting system - Google Patents

Description

  The present invention relates to a discharge lamp lighting device and a lighting system using a lighting fixture equipped with the discharge lamp lighting device.

  Conventionally, supply to the discharge lamp as the cumulative lighting time elapses so that the luminous flux of the discharge lamp is kept constant by compensating for the decrease in the luminous flux of the discharge lamp due to factors such as aging and dirt accompanying the elapsed cumulative lighting time. A discharge lamp lighting device that gradually increases power is provided (see, for example, Patent Document 1).

  Here, in order to perform the control according to the cumulative lighting time as described above, a time counting unit for measuring the cumulative lighting time is provided, and when the discharge lamp is replaced with a new one, the cumulative lighting time in the timing unit is set to 0. It is necessary to return to (reset).

As a timing for resetting the cumulative lighting time, conventionally, the cumulative lighting time is reset when the life of the discharge lamp is detected, or when the reset operation unit manually operated by the user is operated. Or reset.
JP 2001-15276 A

  However, if the cumulative lighting time is reset when the life of the discharge lamp is detected, there is a problem that the cumulative lighting time is not reset when the discharge lamp is replaced before the life of the discharge lamp is detected. there were.

  In addition, when resetting the cumulative lighting time using the reset operation unit, if the reset operation unit is provided in the discharge lamp lighting device, a separate component constituting the reset operation unit is required, and the reset operation unit is a separate device. However, there is a problem that a separate equipment such as a signal line for communication between the device and the discharge lamp lighting device is required.

  The present invention has been made in view of the above reasons, and its purpose is to provide a discharge lamp lighting device capable of diverting existing signal lines for dimming signals to control other than dimming and on / off, and An object of the present invention is to provide an illumination system using the discharge lamp lighting device.

The invention of claim 1 is a lighting unit for lighting a discharge lamp, a receiving unit for receiving a dimming signal which is a PWM signal inputted from the outside and indicating a dimming ratio of the discharge lamp, and a light source which is lit by the lighting unit. A timing unit that counts the cumulative lighting time of the lamp, a control unit that controls the lighting unit based on the cumulative lighting time measured by the timing unit and the dimming signal received by the receiving unit, and the reception unit A command detection unit that detects that the dimming signal satisfies a predetermined command condition set in advance, and the timing unit is turned on when the command detection unit detects that the dimming signal satisfies the command condition The time is returned to the initial value, and the command condition is that a switch for setting the duty ratio of the dimming signal to 0% and a switch for setting the duty ratio of the dimming signal to a predetermined duty ratio are a predetermined time limit. Repeated twice alternately at intervals of less than And characterized in that.

  According to this invention, equipment such as an existing signal line for the dimming signal can be used for control for returning the cumulative lighting time to the initial value.

The invention of claim 2 is a lighting unit for lighting a discharge lamp, a receiving unit for receiving a dimming signal which is a PWM signal inputted from the outside and instructing a dimming ratio of the discharge lamp, and a light source lit by the lighting unit. A timing unit that counts the cumulative lighting time of the lamp, a control unit that controls the lighting unit in any of a plurality of operation modes, and a dimming signal received by the receiving unit is predetermined for each operation mode. A command detection unit that detects that the command condition is satisfied, and the control unit is turned on as an operation mode so as to compensate for a decrease in luminous flux as the cumulative lighting time elapses based on the cumulative lighting time measured by the time measuring unit. At least an operation mode for controlling the lighting unit, and an operation mode for controlling the lighting unit so that the light output of the discharge lamp is a light output corresponding to the dimming signal received by the receiving unit. Corresponding to the operation mode It is those for switching the operation mode when it decrees satisfy is detected by the command detection section in the operation mode corresponding to the finger age condition, the command condition, the switching of the duty ratio of the dimming signal and 0% The switching to set the duty ratio of the dimming signal to a predetermined duty ratio predetermined for each operation mode is alternately repeated twice at intervals less than a predetermined time limit .

  According to this invention, equipment such as an existing signal line for dimming signals can be used for control for switching the operation mode.

  The invention of claim 3 is the invention of claim 1 or claim 2, further comprising a no-load detection unit for detecting a no-load state in which the discharge lamp is removed from the lighting unit, and the command detection unit is a no-load detection unit It is characterized in that it operates only during a period during which no load condition is detected.

  According to this invention, even when the same dimming signal is transmitted from the dimming device to a plurality of discharge lamp lighting devices all at once, control for returning the cumulative lighting time to the initial value and control for switching the operation mode By removing the discharge lamp of the discharge lamp lighting device that is desired to be the target, any discharge lamp lighting device can be the target of the control.

  Invention of Claim 4 is the discharge lamp lighting device as described in any one of Claims 1-3, respectively, and at least 1 lighting fixture which has the fixture main body in which the discharge lamp lighting device was accommodated, and each And a light control device that transmits a light control signal to each of the lighting fixtures.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, the dimming device includes at least one command switch that receives an operation input by a user in association with each command condition, and any one of the command switches is A dimming signal that satisfies a command condition associated with the command switch is transmitted when operated.

  According to the present invention, the dimming signal satisfying the command condition is compared with the case where the operation of a certain procedure or the strict operation is required to output the dimming signal satisfying the command condition from the dimming device. The operation to output from becomes easy.

  According to the first aspect of the present invention, the time measuring unit returns the accumulated lighting time to the initial value when the command detecting unit detects that the dimming signal satisfies the predetermined command condition. The equipment such as the signal line can be used for the control for returning the cumulative lighting time to the initial value.

  According to the invention of claim 2, when the command detecting unit detects that the dimming signal satisfies the command condition corresponding to one of the plurality of operation modes, the control unit corresponds to the command condition. Therefore, it is possible to divert equipment such as an existing signal line for the dimming signal to control for switching the operation mode.

  According to the invention of claim 3, since the command detection unit operates only during a period in which the no-load detection unit detects the no-load state, the same dimming is performed simultaneously from the dimming device to the plurality of discharge lamp lighting devices. Even if a signal is being transmitted, any discharge lamp can be removed by removing the discharge lamp of the discharge lamp lighting device that is to be subject to control of returning the cumulative lighting time to the initial value or switching of the operation mode. A lighting device can be the target of the control.

  According to the invention of claim 5, since the light control device has a command switch that receives an operation input by the user, and transmits the light control signal that satisfies the command condition when the command switch is operated, the light control device Compared to the case where an operation of a certain procedure or a strict operation is required to output a dimming signal that satisfies the command condition, the dimming device can easily operate a dimming signal that satisfies the command condition.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 2, the discharge lamp lighting device 1 of the present embodiment supplies a discharge lamp La by supplying AC power to the discharge lamp La, and controls the frequency of the output of the lighting circuit 2 to control the discharge lamp La. And a receiving circuit 4 that receives a dimming signal that is input from the outside and indicates the dimming ratio of the discharge lamp La.

  The lighting circuit 2 outputs the rectifying / smoothing circuit 21 that rectifies and smoothes the AC voltage of the commercial power supply AC and converts it into a DC voltage, the boosting chopper circuit 22 that boosts the output voltage of the rectifying and smoothing circuit 21, and the boosting chopper circuit 22. And an inverter circuit 23 for converting a DC voltage into an AC voltage and supplying the converted voltage to the discharge lamp La. The inverter circuit 23 includes a series circuit of two switching elements Q1 and Q2 composed of, for example, field effect transistors connected between the output terminals of the boost chopper circuit 22, a connection point between the switching elements Q1 and Q2, and one of the discharge lamps La. And a series circuit of a resonance / current limiting inductor L1 and a DC cut capacitor C1 connected between one end of the filament and a drive unit 23a for alternately turning on and off the switching elements Q1 and Q2. One end of the other filament of the discharge lamp La is connected to the output terminal on the low voltage side of the boost chopper circuit 22, and a preheating and resonance capacitor C2 is connected between the other ends of the filament of the discharge lamp La. That is, the inverter circuit 23 is a known half-bridge circuit.

  The control circuit 3 is composed of, for example, a microcomputer, and a control unit 31 that controls the light output of the discharge lamp La by controlling the frequency at which the drive unit 23a turns on and off the switching elements Q1 and Q2 (hereinafter referred to as “operation frequency”). And a storage unit 32 that is composed of a nonvolatile memory such as an EEPROM and stores the accumulated lighting time. Specifically, the control unit 31 inputs a PWM signal having a duty ratio according to a ratio of power supplied to the discharge lamp La to rated power (hereinafter referred to as “light control ratio”) to the drive unit 23a. The drive unit 23a alternately turns on and off the switching elements Q1 and Q2 at an operating frequency corresponding to the duty ratio of the input PWM signal. The operating frequency is controlled within a range higher than the resonant frequency (hereinafter simply referred to as “resonant frequency”) of a resonant circuit composed of the capacitors C1 and C2, the inductor L1, and the discharge lamp La. Becomes closer to the resonance frequency, the power supplied to the discharge lamp La increases.

  In addition, the control unit 31 includes a timer circuit, measures the lighting time of the discharge lamp La, and updates the cumulative lighting time stored in the storage unit 32 as appropriate. That is, the control circuit 3 of the present embodiment is also a time measuring unit in the claims. The timing for starting the measurement of the lighting time may be a timing at which preheating of the discharge lamp La is started, or may be a timing at which the lighting of the discharge lamp La is stable. In this embodiment, since a timer circuit included in a general microcomputer is used, the number of parts is reduced as compared with a case where a timer is separately provided.

  The control unit 31 includes an initial illuminance correction mode for controlling the power supplied to the discharge lamp La according to only the cumulative lighting time regardless of the dimming signal, and the discharge lamp La according to only the dimming signal regardless of the cumulative lighting time. A dimming mode for controlling the power supplied to the lamp and a combination of controlling the power supplied to the discharge lamp La according to the dimming signal, but using the upper limit of the power supplied to the discharge lamp La as the power corresponding to the cumulative lighting time The operation mode can be switched between three modes.

  Here, when the discharge lamp La is rated-lit, the ratio of the luminous flux to the luminous flux at the time of a new article (hereinafter referred to as “light output”) is obtained as the cumulative lighting time elapses as shown in the upper graph of FIG. Along with this, it decreases monotonously. In the initial illumination correction mode, the control unit 31 of the present embodiment gradually increases the dimming ratio as the cumulative lighting time elapses as shown in the lower graph of FIG. 3 and FIG. This compensates for the decrease in the light output, and maintains a substantially constant light output. For example, the dimming ratio when the cumulative lighting time is 0, which is the initial value, is 70%, and the dimming ratio is 100 at a predetermined cumulative lighting time (12000 hours in the figure) at which the light output at the rated lighting is 70%. %, The light output is kept substantially constant until the predetermined cumulative lighting time by gradually increasing the dimming ratio as the cumulative lighting time elapses. In obtaining the dimming ratio from the cumulative lighting time, a data table may be used or a calculation formula may be used. In the combined mode, the upper limit value of the dimming ratio (hereinafter referred to as the “dimming upper limit value”) is used as the dimming ratio in the initial illuminance correction mode, and the dimming ratio exceeding the upper dimming limit value is indicated. When a dimming signal is input, the dimming ratio is set as the dimming upper limit value. That is, after the predetermined cumulative lighting time (12000 hours in the figure) when the dimming upper limit is 100%, the operation in the combined mode is the same as the operation in the external dimming mode.

  The receiving circuit 4 is connected to the light control device 5 through, for example, a two-wire signal line SL, and is provided to eliminate the polarity of the light control signal as shown in FIG. A diode bridge DB to which SL is connected and a photocoupler PC having an input terminal connected to the output terminal of the diode bridge DB via resistors R1 and R2 and a protective Zener diode ZD. The receiving circuit 4 includes voltage dividing resistors R3 and R4 that divide the constant voltage VD, and a capacitor C1 connected between both ends of the voltage dividing resistor R4 on the low voltage side. The voltage at the connection point is smoothed by the capacitor C1 and input to the control unit 31 of the control circuit 3. The output end of the photocoupler PC is connected between both ends of the voltage dividing resistor R4 on the low voltage side. The dimming signal is a PWM signal having a duty ratio corresponding to the instructed dimming ratio. The higher the duty ratio (on duty) of the dimming signal, the lower the analog voltage signal is input from the receiving circuit 4 to the control circuit 3. . The control unit 31 of the control circuit 3 includes an A / D conversion circuit, and the analog voltage is A / D converted and read by the A / D conversion circuit.

  As shown in FIG. 6, the dimming device 5 has a fader 51a made of, for example, a slide-type variable resistor, a dimming signal on / off switch 51b made of, for example, a dip switch, and a dimming signal on / off switch 51b. If the dimming signal ON / OFF switch 51b is ON, the duty ratio according to the knob position of the fader 51a is set to 0% (that is, the dimming signal is not output). A dimming signal generation unit 52 that outputs the dimming signal and a pair of output terminals 53a and 53b to which the signal line SL is connected. One output terminal 53b is connected to the ground, and the dimming signal generator 52 is connected to the other output terminal 53a.

  As a relationship between the duty ratio of the dimming signal and the instructed dimming ratio, for example, as shown in FIG. 7, a duty ratio of 0% to 5% is associated with a dimming ratio of 100%, and 85% to 95%. % Duty ratio is associated with a dimming ratio of 25%, which is the lower limit of the dimming ratio, and a duty ratio of 5% to 85% is linearly associated with a dimming ratio of 100% to 25%. A duty ratio of% to 100% is associated with light extinction. That is, when the dimming signal having a duty ratio of less than 95% is input to the receiving circuit 4 during the operation in the external dimming mode or the combination mode, the control unit 31 corresponds the dimming ratio to the duty ratio. When the dimming ratio (however, the dimming ratio below the dimming upper limit in the combined mode) and the dimming signal with a duty ratio of 95% or more is input to the receiving circuit 4, the operation of the drive unit 23a is stopped. The discharge lamp La is turned off. In the initial illuminance correction mode, the discharge lamp La is not turned off even if a dimming signal with a duty ratio of 95% or more is input to the receiving circuit 4 (see FIG. 4).

  The control unit 31 also resets the cumulative lighting time and switches between the operation modes when a dimming signal that changes so as to satisfy certain corresponding command conditions is input. That is, the control unit 31 of this embodiment is also a command detection unit.

  More specifically, as shown in FIG. 1, the control unit 31 performs control for switching (resetting) the cumulative lighting time to 0, which is the initial value, from the duty ratio of the dimming signal being 0% or switching the operation mode. When switching to a predetermined duty ratio for each control (100% in resetting the cumulative lighting time shown in FIG. 1; hereinafter referred to as “specific duty ratio”), an operation for the control ( In the example of FIG. 1, an operation reception state for receiving an operation for resetting the cumulative lighting time) is entered, and counting of the operation time is started. When the operation time is less than the predetermined time limit (5 seconds in the figure), that is, after the dimming signal is switched to the specific duty ratio, the duty ratio of the dimming signal is switched to 0% again after the time limit is exceeded. Then, 1 is added to the operation count stored in the RAM of the control unit 31, and the operation time is reset and time is counted again from 0. Thereafter, in the same manner, the duty ratio of the dimming signal is switched to the other of 0% and the specific duty ratio within the time limit since the duty ratio of the dimming signal was switched to 0% or the specific duty ratio last time. If the operation count number is 2 or less, 1 is added to the operation count number. When the dimming signal is switched as described above (that is, the dimming signal duty ratio is switched from 0% to the specific duty ratio) in the state where the operation count number is 3, the operation count number and the operation time are changed. Are reset to 0, and the operation acceptance state is terminated, and the control in which the operation has been accepted is executed (in the example of FIG. 1, the cumulative lighting time is reset). When the operation time reaches the time limit without switching the duty ratio of the dimming signal as described above, the control unit 31 executes the control in which the operation has been accepted as shown in FIG. Without returning the operation count number and the operation time to 0, the operation acceptance state is terminated.

  In order to output the dimming signal as described above, the operation to be performed on the dimming device 5 is to first perform an operation of setting the duty ratio of the dimming signal to 0%, and then to the duty ratio of the dimming signal. The procedure of performing the operation of setting the duty ratio of the dimming signal to 0% within the time limit after performing the operation to set the specific duty ratio is repeated twice at intervals within the time limit. An operation for setting the duty ratio of the dimming signal to the specific duty ratio should be performed within the time limit. At this time, only the operation of the fader 51a may be performed, or the dimming signal on / off switch 51b is operated or the power of the dimming device 5 is turned on / off in a state where the knob position of the fader 51a is set to the position corresponding to the specific duty ratio. May be performed.

  In this embodiment, the specific duty ratio for switching to the initial illuminance correction mode is set to 80%, the specific duty ratio for switching to the external dimming mode is set to 60%, and the specific duty ratio for switching to the combined mode is specified. The duty ratio is 40% as shown in FIG.

  According to the above configuration, existing facilities such as the signal line SL and the light control device 5 can be used for control other than light control such as resetting the cumulative lighting time and switching the operation mode by remote control.

  In addition, when the duty ratio of the dimming signal changes in a predetermined pattern, the cumulative lighting time is reset and the operation mode is switched.Therefore, the cumulative lighting time is reset and the operation mode is switched to the duty ratio of the dimming signal. There is no need to occupy a range.

  As shown in FIG. 10, the discharge lamp lighting device 1 of the present embodiment includes a socket 61 that is electrically connected to the discharge lamp lighting device 1 and electrically and mechanically connected to the discharge lamp La, and a discharge lamp. The lighting device 6 can be used for the lighting device 6 including the lighting device 1 and the fixture main body 62 holding the socket 61. In the example of FIG. 10, the lower surface of the instrument main body 62 is white, for example, and distributes the light of the discharge lamp La. In this embodiment, since the instruction for resetting the cumulative lighting time is performed by the dimming signal, a conventional product that does not perform initial illuminance correction is used as the fixture main body 62 of the lighting fixture 6, and a switch for resetting the cumulative lighting time. It can be diverted without performing processing for adding etc. Moreover, the lighting fixture 6 using the discharge lamp lighting device 1 as described above can constitute a lighting system using a plurality of the lighting fixtures 6 together with the light control device 5.

  In the light control device 5, a command switch 51c for resetting the cumulative lighting time is provided as shown in FIG. 11, or one operation switch is provided for each operation mode as shown in FIG. Command switches 51d to 51f for switching may be provided. That is, when the command switches 51c to 51f are operated by the user, the dimming signal generation unit 52 outputs a dimming signal with a duty ratio of 0% for one second regardless of the position of the knob of the fader 51a. After that, the operation of outputting the dimming signal having the specific duty ratio corresponding to the operated command switches 51c to 51f for one second is repeated twice. If this configuration is adopted, the cumulative lighting time can be reset and the operation mode can be switched simply by operating the command switches 51d to 51f, and the operation becomes easy.

  Further, as already described, in this embodiment, since the duty ratio of the dimming signal of 95% to 100% is not associated with the dimming ratio, the command condition is that the duty ratio of the dimming signal is in the above range. It can also be used as For example, as shown in FIG. 13, when the dimming signal having a duty ratio of 95% or more and less than 97% is input, the control unit 32 switches to the external dimming mode, and the dimming ratio is 97% or more and less than 99%. When the light signal is input, the mode is switched to the combined mode, and when the light control signal having a duty ratio of 99% or more is input, the mode may be switched to the initial illuminance correction mode. Since the dimming signal having a duty ratio of 95% to 100% is also an instruction to turn off the discharge lamp La, in the above case, the discharge lamp La is turned off when the operation mode is switched. When this configuration is adopted, the time required for switching the operation mode is shortened compared to the case where the operation mode is switched by switching the dimming signal in a predetermined procedure. Further, in this case, a command switch 51c for resetting the cumulative lighting time as shown in FIG. 11 and command switches 51d to 51f for switching the operation mode as shown in FIG. 12 are provided. The movable range of the knob and the circuit are configured so that the duty ratio in the range of 100% to 100% cannot be specified, and the duty ratio corresponding to the operated command switches 51d to 51f is only when the command switches 51d to 51f are operated. It is also possible to prevent switching of the operation mode due to an erroneous operation of the fader 51a by outputting a dimming signal of 95% to 100%.

  Here, as shown in FIG. 14, when a plurality of discharge lamp lighting devices 1 are connected to the dimming device 5, the dimming signal of the dimming device 5 is transmitted to all the discharge lamp lighting devices 1. Thus, with the above configuration, it is impossible to reset the cumulative lighting time only with one discharge lamp lighting device 1. Therefore, as shown in FIG. 15, there are provided no-load detection circuits 71 and 72 for detecting the no-load state in which the discharge lamp La is removed, and only the period during which the no-load state is detected by the no-load detection circuit 7. The control unit 31 may accept an instruction to reset the cumulative lighting time by the dimming signal. That is, during the period when the no-load detection circuits 71 and 72 are not detecting the no-load state, the operation acceptance state is not set even if the duty ratio of the dimming signal is switched from 0% to 100%. Since such no-load detection circuits 71 and 72 can be realized by a known technique, detailed description and illustration thereof are omitted. By adopting this configuration, if the discharge lamp La is removed only in the discharge lamp lighting device 1 for which the cumulative lighting time is desired to be reset, the cumulative lighting time can be selectively reset only in any discharge lamp lighting device 1. .

  When the drive unit 23a accepts an analog voltage signal, as shown in FIG. 16, the PWM signal output from the control unit 31 is smoothed and a voltage value corresponding to the duty ratio of the PWM signal is obtained. A smoothing unit 33 that inputs an analog voltage signal to the driving unit 23a may be provided.

  Further, depending on the configuration of the control unit 31, the receiving circuit 4 may be omitted and the dimming signal may be directly input to the control unit 31. In this case, the control unit 31 also serves as a receiving unit in the claims.

  Furthermore, switching of the operation mode may be omitted, and the operation mode may be, for example, only the combined mode or only the initial illuminance correction mode. Here, even when the operation mode is only the initial illuminance correction mode and the dimming signal is not used to control the dimming ratio, the existing lighting of the signal line SL and the dimmer 5 can be reset by remote control. Therefore, the fixture body of the lighting fixture can be diverted without performing processing for adding a switch for resetting the cumulative lighting time, etc. There is an advantage that you can.

It is explanatory drawing which shows operation | movement when the accumulation lighting time is reset in this embodiment. It is a circuit block diagram which shows the same as the above. It is explanatory drawing which shows the relationship between the cumulative lighting time of a discharge lamp, light output, and the light control ratio in an initial stage illumination intensity correction mode in the same as the above. It is explanatory drawing which shows operation | movement same as the above. It is a circuit diagram which shows a receiving circuit same as the above. It is a block diagram which shows a light control apparatus same as the above. It is explanatory drawing which shows the relationship between the duty ratio of the light control signal in the same as above, and the light control ratio. It is explanatory drawing which shows operation | movement when cumulative lighting time is not reset in the same as the above. It is explanatory drawing which shows operation | movement when an operation mode is switched to a combination mode in the same as the above. It is a front view which shows an example of the lighting fixture using the same as the above. It is a block diagram which shows the light modulation apparatus in another form same as the above. It is a block diagram which shows the light modulation apparatus in another form same as the above. It is explanatory drawing which shows operation | movement of another form same as the above. It is a block diagram which shows an example of the usage pattern same as the above. It is a circuit block diagram which shows another form same as the above. It is a circuit block diagram which shows another form same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge lamp lighting device 2 Lighting circuit 3 Control circuit 4 Receiving circuit 5 Light control device 51c-51f Command switch 61 Socket 62 Appliance main body 71, 72 No-load detection circuit

Claims (5)

A lighting part for lighting the discharge lamp;
A receiving unit that receives a dimming signal that is a PWM signal that is input from the outside and instructs the dimming ratio of the discharge lamp;
A timekeeping section that times the cumulative lighting time of the discharge lamps lit by the lighting section;
A control unit for controlling the lighting unit based on the cumulative lighting time measured by the time measuring unit and the dimming signal received by the receiving unit;
A command detection unit that detects that the dimming signal received by the reception unit satisfies a predetermined command condition set in advance;
The timekeeping unit returns the cumulative lighting time to the initial value when the command detection unit detects that the dimming signal satisfies the command condition ,
The command condition is that the switching to set the duty ratio of the dimming signal to 0% and the switching to set the duty ratio of the dimming signal to the predetermined duty ratio are alternately repeated twice at intervals less than the predetermined time limit. the discharge lamp lighting apparatus, characterized in that it. A lighting part for lighting the discharge lamp;
A receiving unit that receives a dimming signal that is a PWM signal that is input from the outside and instructs the dimming ratio of the discharge lamp;
A timekeeping section that times the cumulative lighting time of the discharge lamps lit by the lighting section;
A control unit that controls the lighting unit in any of a plurality of operation modes;
A command detection unit that detects that the dimming signal received by the reception unit satisfies a predetermined command condition predetermined for each operation mode;
The control unit
As the operation mode, the receiving unit receives the operation mode for controlling the lighting unit so as to compensate for the decrease in the luminous flux with the passage of the cumulative lighting time based on the cumulative lighting time timed by the clocking unit, and the light output of the discharge lamp. And at least an operation mode for controlling the lighting unit so as to obtain a light output according to the dimming signal,
When the dimming signal detects that the command condition corresponding to one of the operation modes is detected by the command detection unit, the operation mode is switched to the operation mode corresponding to the command condition ,
The command condition is that an interval between the switching for setting the duty ratio of the dimming signal to 0% and the switching for setting the duty ratio of the dimming signal to a predetermined duty ratio predetermined for each operation mode is less than a predetermined time limit. The discharge lamp lighting device is characterized by being alternately repeated twice . With a no-load detection unit that detects the no-load state where the discharge lamp is removed from the lighting part,
The discharge lamp lighting device according to claim 1, wherein the command detection unit operates only during a period in which the no-load state is detected by the no-load detection unit. Each of the discharge lamp lighting device according to any one of claims 1 to 3, and at least one lighting fixture having a fixture main body in which the discharge lamp lighting device is housed,
Irradiation Akifumi stem, characterized in that it comprises a dimming device transmits a respective dimming signal to each luminaire. The light control device has at least one command switch that is associated with the command condition and receives an operation input by the user, and the command associated with the command switch when any command switch is operated. irradiation Akifumi stem of claim 4, wherein the transmitting a satisfying dimming signal.

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