JP2005209541A - Discharge lamp lighting device, lighting fixture, and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device, a lighting fixture, and a lighting system in which clocking errors on accumulated lighting hours between a plurality of discharge lamp lighting devices can be decreased. <P>SOLUTION: This device is provided with a lighting hour counting part 14 that counts zero-cross timing of voltage variation pattern of the alternate current supplied by outside commercial power source, a lighting hour memory part 15 composed of nonvolatile memories that accumulatively memorizes the values counted by the lighting hour counter 14, and a lighting adjustment control part 17 that adjusts the brightness of the discharge lamp 5 in accordance with the counted value of the zero-cross timing memorized in the lighting hour memory part 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

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

  The brightness (luminous flux) of a discharge lamp used for illumination decreases with the passage of lighting time when supplying constant power. For example, when the brightness at the beginning of the life of the discharge lamp is set to 100%, the brightness at the end of the life is reached. It is known that the brightness decreases to about 70%. Therefore, a discharge lamp lighting device having an initial illuminance correction function for adjusting the brightness of the discharge lamp is known so that a constant brightness can be obtained even at the end of the life of the discharge lamp in which the illuminance has decreased with the passage of lighting time. (For example, refer to Patent Document 1). This discharge lamp lighting device cumulatively measures the time during which power is supplied to the discharge lamp lighting device as the discharge lamp lighting time, and uses the previously known discharge lamp brightness deterioration characteristics over time. Thus, the amount of power supplied to the discharge lamp is adjusted according to the cumulative lighting time so that the brightness of the discharge lamp becomes constant. That is, when the brightness at the end of the life is reduced to about 70% (maintenance rate 70%), the discharge lamp is lit at 70% output, that is, the dimming ratio 70% at the beginning of lighting of the discharge lamp. The output is gradually increased with the lapse of lighting time of the discharge lamp so as to maintain the illuminance.

  FIG. 15 is a block diagram for explaining the configuration of the discharge lamp lighting device 101 according to the background art. A discharge lamp lighting device 101 shown in FIG. 15 includes a diode bridge 102 for rectifying the commercial AC power supply AC, an inverter circuit 104 that supplies power to the discharge lamp 103 attached to the discharge lamp lighting device 101, and an inverter circuit. Inverter control circuit 106 that controls the operation of 104, the illuminance correction control unit 107 that controls the operation of inverter control circuit 106 to realize the above-described initial illuminance correction function, and inverter control circuit 106 and illuminance correction control unit 107 And a control power supply circuit 108 for supplying an operation power supply voltage.

  The illuminance correction control unit 107 includes a lighting time counter 109, a lighting time storage unit 110, a dimming table 111, and a dimming control unit 112, and stores, for example, a program for executing the initial illuminance correction function or dimming A ROM (Read Only Memory) used as the table 111, a RAM (Random Access Memory) that temporarily stores data generated during or after the execution of the program, and an EEPROM (Electrically) that is a non-volatile memory used as the lighting time storage unit 110 An Erasable and Programmable Read Only Memory) and a timer module used as the lighting time counter 109 are constituted by a so-called single-chip microcontroller integrated on one chip. An oscillator 113 for supplying an operation clock of the microcontroller is connected to the illuminance correction control unit 107.

  When the commercial AC power supply AC is supplied to the discharge lamp lighting device 101, the operation power supply voltage is supplied from the control power supply circuit 108 to the inverter control circuit 106 and the illuminance correction control unit 107.

  The lighting time counter 109 is supplied with the operating power supply voltage from the control power supply circuit 108 (at the same time, the inverter control circuit 106 starts oscillation of the inverter circuit 104 and the discharge lamp 103 is turned on), and the timer module passes the elapsed time. The counting time is cumulatively stored in the lighting time storage unit 110. When the operation power supply voltage is not supplied from the control power supply circuit 108 (at the same time, the discharge lamp 103 is turned off), the elapsed time counting is ended.

  As a result, the time during which power is supplied to the discharge lamp lighting device is cumulatively counted as the lighting time of the discharge lamp 103, and the cumulative lighting time is after the power supply by the commercial AC power supply AC is lost. Is also stored in the lighting time storage unit 110.

  The dimming table 111 stores in advance a cumulative lighting time of the discharge lamp 103 and a dimming ratio corresponding to the cumulative lighting time. In addition, the dimming table 111 is set to increase the dimming ratio with the passage of time so as to suppress the decrease in luminous flux and maintain the light output from the discharge lamp constant regardless of the cumulative lighting time. .

Then, the dimming control unit 112 outputs a control signal to the inverter control circuit 106 to turn on the discharge lamp 103 at a dimming ratio corresponding to the cumulative lighting time stored in the lighting time storage unit 110, and the inverter circuit By adjusting the power for lighting from 104 to the discharge lamp 103, the brightness of the discharge lamp is adjusted, and the initial illuminance correction is performed.
JP 2001-15276 A

  By the way, as described above, when the lighting time counter 109 is configured using a built-in timer module or software counter of the microcontroller, the time measurement accuracy is determined by the oscillator 113 that supplies the operation clock of the microcontroller. As the oscillator 113, a crystal oscillator or a ceramic oscillator is used. However, there is an error of about 0.5% in the oscillation period of these resonators, and this error becomes a problem when the time is cumulatively counted as described above. Now, assuming that the error of the oscillator is ± 0.5% and the rated life of the discharge lamp is 12000 hours, an error of ± 60 hours at maximum occurs after 12000 hours, which is the rated life of the discharge lamp. Then, when a plurality of lighting fixtures having such a notification function are installed in the same space and the power is turned on / off by the same switch, the time value of the cumulative lighting time at the end of the lifetime between the lighting fixtures is calculated. Since the difference is 120 hours at the maximum, there is a disadvantage that the brightness of the discharge lamp can be adjusted with a variation of 120 hours depending on the fixtures even though the fixtures are installed in the same space at the same time. .

  Further, in such a lighting fixture, it is conceivable to provide a notification function for notifying the user of the end of life of the discharge lamp, for example, based on the cumulative lighting time, but there are a plurality of lighting fixtures having such a notification function. When installed in the same space and the power is turned on / off by the same switch, even if it is a lighting device installed at the same time in the same space, some devices have a notification function with a variation of 120 hours. As a result of being able to operate, there is a disadvantage that the user is confused or uncomfortable.

  The present invention is an invention made in view of such a problem, and provides a discharge lamp lighting device, a lighting fixture, and a lighting system capable of reducing a time error in cumulative lighting time among a plurality of discharge lamp lighting devices. The purpose is to provide.

  In order to achieve the above object, a discharge lamp lighting device according to the first means of the present invention includes a power supply receiving unit that receives an input of an AC power supply, and is obtained from an AC power supply received by the power supply receiving unit. A discharge lamp lighting device for causing the discharge lamp to emit light by supplying power to the discharge lamp, the counting unit counting the periodic feature points of the AC power supply voltage waveform received by the power supply receiving unit, and the counting And a dimming control unit that adjusts the brightness of the discharge lamp according to the first count value cumulatively counted by the unit.

  Further, in the above-described discharge lamp lighting device, the dimming control unit adjusts the brightness of the discharge lamp so as to suppress a decrease in brightness with the passage of light emission time in the discharge lamp. It is a feature.

  In the above-described discharge lamp lighting device, the dimming control unit has a turn-off mode for turning off the discharge lamp in a state where the input of the AC power is received by the power supply receiving unit, and the counting unit is In the light-off mode, the first count value is not counted.

  Furthermore, in the above-described discharge lamp lighting device, when the first count value is equal to or greater than a lifetime determination value set in advance as a value indicating the lifetime of the discharge lamp, the discharge lamp has reached the lifetime. It is further characterized by further comprising a notification unit for notification.

  The above-described discharge lamp lighting device further includes a count instruction receiving unit that receives a count start instruction for instructing a count start of a second count value for controlling the brightness of the discharge lamp. The unit further starts counting the feature points as the second count value when the counting instruction receiving unit receives the counting start instruction, and the dimming control unit is configured to start the counting by the counting unit. A setting unit for setting the adjustment content for adjusting the brightness of the discharge lamp according to the count value of 2, and the second by the counting unit based on the adjustment content set in the setting unit It further comprises a schedule control unit for adjusting the brightness of the discharge lamp according to the count value.

  And in the above-mentioned discharge lamp lighting device, when the input of the AC power supply is received by the power supply receiving unit, the discharge lamp lighting device further comprises a preheating unit for starting preheating of the filament for lighting in the discharge lamp, the counting unit, When the input of the AC power supply is received by the power reception unit, the feature point counting is further started as a third count value, and the dimming control unit is configured to count the third count counted by the counting unit. When the count value reaches a preset start determination value, light emission of the discharge lamp is started.

  Furthermore, the lighting fixture which concerns on the 2nd means of this invention is a lighting fixture provided with the discharge lamp and the discharge lamp lighting device which lights a discharge lamp, The said discharge lamp lighting device is a discharge lamp in any one of the above-mentioned It is a lighting device.

  And the illumination system which concerns on the 3rd means of this invention collectively supplies the several discharge lamp lighting device which each supplies electric power to a several discharge lamp, and supply of the alternating current power to the said several discharge lamp lighting device A switch for turning on and off, wherein the plurality of discharge lamp lighting devices are any one of the discharge lamp lighting devices described above.

  A discharge lamp lighting device having such a configuration, and a lighting fixture and a lighting system using the same, by cumulatively counting periodic feature points of an AC power supply voltage waveform common to other discharge lamp lighting devices, Since the cumulative lighting time of the discharge lamp is timed, it is possible to reduce the timing error of the cumulative lighting time between the plurality of discharge lamp lighting devices.

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

(First embodiment)
FIG. 1 is a diagram illustrating an example of a configuration of an illumination system according to the first embodiment of the present invention. A lighting system 1 shown in FIG. 1 is a lighting system used in a room A of a building, for example, and includes a plurality of lighting fixtures 2, wiring for supplying an AC voltage Vac from a commercial power source to each lighting fixture 2, and a plurality of lighting fixtures. The switch SW1 that turns on and off the supply of the AC voltage Vac to the lighting fixtures 2 at once is provided. FIG. 2 is a perspective view showing an example of the appearance of the lighting fixture 2 shown in FIG. The luminaire 2 shown in FIG. 2 emits light as a luminaire main body 3, a connector 4 for attaching the discharge lamp 5 to the luminaire 2, and a display unit for notifying the user that the discharge lamp 5 has reached the end of its life. And a diode (LED) D1. A discharge lamp lighting device 6 is stored inside the lighting fixture body 3.

  FIG. 3 is a block diagram for explaining an example of the configuration of the discharge lamp lighting device 6 housed in the luminaire main body 3 shown in FIG. The discharge lamp lighting device 6 shown in FIG. 3 includes terminal blocks T1 and T2 that receive an input of an AC voltage Vac from a commercial power source, a diode bridge 7 that rectifies the AC voltage Vac, and a discharge lamp 5 that is attached to the discharge lamp lighting device 6. Inverter circuit 8 for supplying power to the lighting circuit, inverter control circuit 9 for controlling the operation of the inverter circuit 8, and an illuminance correction control unit for controlling the operation of the inverter control circuit 9 to realize the above-described initial illuminance correction function 10. A control power supply circuit 11 that supplies an operation power supply voltage to the inverter control circuit 9 and the illuminance correction control unit 10, an oscillator 12 that supplies an operation clock signal to the illuminance correction control unit 10, and a zero-cross detection circuit 13 Prepare. The illuminance correction control unit 10 includes a lighting time counter 14, a lighting time storage unit 15, a dimming table 16, a dimming control unit 17, and a notification unit 18.

  The inverter circuit 8 includes switching elements Q1, Q2, Q3 including capacitors L1, L2, a diode D2, a MOSFET, and the like, and capacitors C1, C2. A series circuit of an inductor L1 and a switching element Q1 is connected between the output terminals of the diode bridge 7. Further, a series circuit of a diode D2 and a smoothing capacitor C1 is connected between both ends of the switching element Q1, and the inverter circuit 8 is driven by using the smoothing capacitor C1 as a power source.

  Further, switching elements Q2 and Q3 are connected in series between both ends of the smoothing capacitor C1, and between the both ends of the switching element Q3 on the low voltage side, a DC cut capacitor C2, a resonance inductor L2 and a discharge lamp 5 are connected. A series circuit is connected. Further, between the non-power supply side terminals of the filaments provided at both ends of the discharge lamp 5, a capacitor C3 that constitutes a resonance circuit together with the inductor L2 is connected. Switching elements Q2 and Q3 are alternately turned on and off at a high frequency by inverter control circuit 9.

  The operation of the inverter circuit 8 is well known, and the output voltage from the diode bridge 7 is boosted by a boost chopper circuit constituted by an inductor L1, a switching element Q1, a diode D2, and a smoothing capacitor C1, and the switching elements Q2, Q3 Are alternately turned on and off to cause an alternating current to flow through the discharge lamp 5. Here, since the inductor L2 and the capacitor C3 exist in the power supply path to the discharge lamp 5, the discharge lamp depends on the relationship between the ON / OFF cycle of the switching elements Q2 and Q3 and the resonance frequency by the inductor L2 and the capacitor C3. The amount of energy supplied to 5 can be controlled, and the brightness of the discharge lamp 5 can be adjusted.

  The zero cross detection circuit 13 detects a zero cross timing at which the AC voltage Vac becomes 0 V as a periodic feature point of the AC voltage Vac, and outputs a detection signal Vout to the lighting time counter 14. FIG. 4 is a circuit diagram illustrating an example of the configuration of the zero-cross detection circuit 13. The zero cross detection circuit 13 shown in FIG. 4 is configured using a comparator 19. As shown in FIG. 5, the voltage VA obtained by dividing the rectified voltage V0 obtained by full-wave rectification of the AC voltage Vac by the diode bridge 7 by the comparator 19 using the resistors R1 and R2 is predetermined. When the reference voltage Vd becomes lower than the reference voltage Vd, the detection signal Vout indicating the zero cross timing is changed to a high level in a pulse form and output to the lighting time counter 14. The reference voltage Vd is set so that an appropriate pulse signal can be obtained as the detection signal Vout.

  The zero cross detection circuit 13 may be configured to output the detection signal Vout using a half-wave rectified waveform of the AC voltage Vac instead of the voltage VA. Further, the zero-cross detection circuit 13 may detect a timing at which the AC voltage Vac peaks as a periodic feature point of the AC voltage Vac.

  The illuminance correction control unit 10 stores, for example, a program for executing the initial illuminance correction function and a program for informing the life of the discharge lamp 5, or a ROM (Read Only Memory) used as the dimming table 16. RAM (Random Access Memory) that temporarily stores data generated during or after execution of the program, EEPROM (Electrically Erasable and Programmable Read Only Memory) that is a non-volatile memory used as the lighting time storage unit 15, and lighting time A counter module used as the counter 14 is constituted by a so-called single-chip microcontroller in which one counter chip is integrated. And the said microcontroller functions as the lighting time counter 14 and the light control part 17 by executing the program for performing an initial illumination correction | amendment function, and executes the program for alert | reporting the lifetime of the discharge lamp 5 This functions as the notification unit 18.

  The lighting time counter 14 counts the pulse of the detection signal Vout output from the zero cross detection circuit 13, that is, the zero cross timing of the AC voltage Vac, and cumulatively stores the counted value in the lighting time storage unit 15. In the dimming table 16, a count value of zero cross timing corresponding to the cumulative lighting time in the discharge lamp 5 and a dimming ratio corresponding to the cumulative lighting time are associated in advance. In addition, the dimming table 16 controls the dimming ratio over time so as to suppress the decrease in luminous flux with the lapse of the light emission time of the discharge lamp 5 and to maintain the light output from the discharge lamp 5 constant regardless of the cumulative lighting time. It is set to be raised with.

  The dimming control unit 17 controls the inverter control circuit 9 to turn on the discharge lamp 5 at a dimming ratio corresponding to the count value (first count value) of the zero cross timing stored in the lighting time storage unit 15. Output a signal.

  A light emitting diode D <b> 1 is connected to the notification unit 18, and the notification unit 18 uses a zero cross timing count value stored in the lighting time storage unit 15 as a value indicating the life of the discharge lamp 5 in advance. When it is detected that the value exceeds the determination value, the light emitting diode D1 is caused to emit light to notify that the discharge lamp 5 has reached the end of its life.

  Next, the operation of the lighting system 1, the lighting fixture 2, and the discharge lamp lighting device 6 configured as described above will be described. First, in FIG. 1, when the user turns on the switch SW <b> 1, the AC voltage Vac starts to be simultaneously supplied to the plurality of lighting fixtures 2 installed in the room A, and the terminal block T <b> 1 of the discharge lamp lighting device 6 provided in each lighting fixture 2. , T2 accepts AC voltage Vac.

  Next, in each discharge lamp lighting device 6, the AC voltage Vac received by the terminal blocks T1 and T2 is rectified by the diode bridge 7 to become a rectified voltage V0. Then, the power supply voltage for circuit operation generated from the rectified voltage V0 is supplied to the inverter control circuit 9 and the illuminance correction control unit 10 by the control power supply circuit 11, and the inverter circuit according to the control signal from the inverter control circuit 9 8 starts oscillating and power supply to the discharge lamp 5 is started, and the discharge lamp 5 is turned on. On the other hand, the zero cross detection circuit 13 detects the detection signal Vout indicating the zero cross timing based on the voltage VA generated from the rectified voltage V0. Is set to a high level in a pulse form and output to the lighting time counter 14. Further, the zero cross timing is counted by the lighting time counter 14, and the counted value is accumulated and stored in the lighting time storage unit 15.

  Thereby, while the discharge lamp 5 is lit, the zero cross timing of the AC voltage Vac is cumulatively counted. Since the zero cross timing is counted twice in one cycle of the AC voltage waveform, for example, if the power supply frequency is 50 Hz, one count of the zero cross timing corresponds to 10 msec. As a result, the accumulated count value of the zero cross timing is free. The accumulated lighting time of the electric lamp 5 will be represented.

  In this case, the same AC voltage Vac is supplied to each discharge lamp lighting device 6, and the zero cross timing is counted by each discharge lamp lighting device 6 based on the AC waveform of the same AC voltage Vac. The lighting device 6 measures the cumulative lighting time of the discharge lamp 5 in a state synchronized with the AC voltage Vac as a reference, and can reduce the counting error of the cumulative lighting time among the plurality of discharge lamp lighting devices 6.

  Then, the dimming control unit 17 outputs a control signal to the inverter control circuit 9 in order to light the discharge lamp 5 at a dimming ratio corresponding to the accumulated count value of the zero cross timing stored in the lighting time storage unit 15. The brightness of the discharge lamp 5 is adjusted by adjusting the lighting power from the inverter circuit 8 to the discharge lamp 5, and the initial illuminance correction is performed. In this case, variation in brightness adjustment by correcting the initial illuminance of the discharge lamp 5 among the plurality of lighting fixtures 2 installed in the room A shown in FIG. 1 is reduced.

  Furthermore, when the notification unit 18 detects that the count value of the zero cross timing stored in the lighting time storage unit 15 is equal to or greater than a lifetime determination value set in advance as a value indicating the lifetime of the discharge lamp 5. The light emitting diode D1 emits light so as to notify the notification unit 18 that the discharge lamp 5 has reached the end of its life. In this case, since the variation in the timing at which the light emitting diode D1 emits light is reduced among the plurality of lighting fixtures 2 installed in the room A shown in FIG. 1, the user is confused or uncomfortable. It is suppressed.

  FIG. 6 is a diagram for explaining a timing error of the cumulative lighting time among the plurality of discharge lamp lighting devices 6 in the discharge lamp lighting device 6 shown in FIG. First, in the lighting system 1 shown in FIG. 1, for example, in the lighting fixture 2 indicated by the symbol B and the lighting fixture 2 indicated by the symbol C, the lighting fixture 2 indicated by the symbol B is shown in FIG. 6 may start counting the voltage VA from the timing TB shown in FIG. 6, and the lighting fixture 2 indicated by the symbol C may start counting the voltage VA from the timing TC shown in FIG. In this case, the appliance that has started counting from the timing TB counts the time from the zero-cross timing of the timing TB ′, and the appliance that has started counting from the timing TC measures the time from the zero-cross timing of the timing TC ′. / 2 period is an error. That is, when the power supply frequency is 50 Hz, a difference of 10 msec occurs.

  Since it is considered that the same thing can occur when the switch SW1 is turned off, when the switch SW1 is turned on and off once a day, a difference of 20 msec at maximum occurs. As a result, the lighting time of the discharge lamp 5 is 10 hours per day, and a time difference of 20 seconds at maximum can occur after lighting for 10,000 hours (after 1000 days). On the other hand, in the discharge lamp lighting device 101 shown in FIG. 15 according to the background art, a time difference of up to 100 hours may occur between the devices after lighting for 10000 hours due to the accuracy (± 0.5%) of the oscillator 12. As described above, in the illumination system 1, the luminaire 2, and the discharge lamp lighting device 6 illustrated in FIGS. 1, 2, and 3, the periodic characteristics of the AC power supply voltage waveform that is common among the plurality of discharge lamp lighting devices 6. By counting the points, the accumulated lighting time of the discharge lamp 5 is timed, so that the time counting error of the accumulated lighting time among the plurality of discharge lamp lighting devices 6 can be reduced.

  In addition, although the alerting | reporting part 18 showed the structure which alert | reports to a user that the discharge lamp 5 reached lifetime by making the light emitting diode D1 light-emit, display means other than a light emitting diode may be used. For example, it is good also as a structure which alert | reports by emitting a sound using a buzzer etc. In addition, the notification unit 18 may be configured to include, for example, a voice synthesis IC (Integrated Circuit), an amplifier, a speaker, and the like as a voice notification unit for reporting by voice that the discharge lamp 5 has reached the end of its life. Moreover, the alerting | reporting part 18 is good also as what alert | reports that the discharge lamp 5 reached the lifetime by changing the brightness of the discharge lamp 5 so that a user can recognize. The notification unit 18 includes a notification signal output unit that outputs a notification signal for notifying that the discharge lamp 5 has reached the end of its life, for example, a display device provided outside the lighting fixture 2, It is good also as a structure which alert | reports that the discharge lamp 5 reached the lifetime by transmitting a notification signal with respect to a computer etc.

(Second Embodiment)
Next, a lighting system, a lighting fixture, and a discharge lamp lighting device according to a second embodiment of the present invention will be described. FIG. 7 is a diagram illustrating an example of a configuration of an illumination system according to the second embodiment of the present invention. The lighting system 1a shown in FIG. 7 is, for example, a lighting system used in a room A of a building. The switch SW1 for turning on and off the supply of the AC voltage Vac to the lighting fixtures 2a at once and a reset switch SW2 for outputting a reset signal for instructing each of the lighting fixtures 2a to reset the counter. 7 is different from the lighting fixture 2 shown in FIG. 2 in that the lighting fixture 2a includes a discharge lamp lighting device 6a instead of the discharge lamp lighting device 6. Since the other structure is the same as that of the lighting fixture 2 shown in FIG.

  FIG. 8 is a block diagram for explaining an example of the configuration of the discharge lamp lighting device 6a. The discharge lamp lighting device 6a shown in FIG. 8 differs from the discharge lamp lighting device 6 shown in FIG. 1 in the following points. That is, in the discharge lamp lighting device 6a shown in FIG. 8, the illuminance correction control unit 10a further includes a schedule management counter 20 and a schedule setting unit 21, and the schedule management counter 20 is connected to the reset switch SW2. Yes. The illuminance correction control unit 10 a includes a dimming control unit 17 a instead of the dimming control unit 17, and includes a lighting time counter 14 a instead of the lighting time counter 14.

  Since the other configuration is the same as that of the discharge lamp lighting device 6 shown in FIG. 3, the description thereof will be omitted, and the characteristic points of the present embodiment will be described below.

  When the user turns on the switch SW1, the schedule management counter 20 is supplied with the AC voltage Vac to the discharge lamp lighting device 6a, and the control power supply circuit 11 supplies the power supply voltage for circuit operation to the illuminance correction control unit 10a. Then, the pulse signal of the detection signal Vout output from the zero-cross detection circuit 13 starts counting from zero as a schedule count value (second count value). The schedule management counter 20 resets the count value when detecting that the reset switch SW2 is turned on by the user, and again uses the pulse signal of the detection signal Vout output from the zero-cross detection circuit 13 as the schedule count value. Start counting from zero. In this case, for example, if the AC voltage Vac is 50 Hz, one count of the schedule count value corresponds to 10 msec, and the schedule management counter 20 measures the elapsed time since the switch SW1 or the reset switch SW2 is turned on. It will be.

  The schedule setting unit 21 is a storage unit configured by, for example, an EEPROM, and stores schedule data (adjustment content) for controlling the brightness of the discharge lamp 5 such as lighting, extinguishing, and dimming of the discharge lamp 5 in advance. Has been. The schedule data is obtained by associating the schedule count value of the schedule management counter 20 with the control content of the discharge lamp 5. For example, “(1) Count value 0 to 1439999: FULL lighting (initial illumination correction state), ( 2) Count value 1440000 (corresponding to 4 hours) to 1799999: Dimming lighting, (3) Count value 1800000 (corresponding to 5 hours) to 4319999: FULL lighting (initial illuminance correction state), (4) Count value 4320000 (12 (Corresponding to time) to 4679999: dimming on, (5) count value 4680000 (corresponding to 13 hours) or more: off.

  The discharge lamp lighting device 6a includes an interface circuit configured to be able to transmit and receive data to and from an external device such as a personal computer connected to the outside, and the user uses an external device such as a personal computer. The schedule data may be set in the schedule setting unit 21 via the interface circuit. The interface circuit may be a wireless communication interface such as an infrared remote controller. Moreover, the schedule setting part 21 is comprised by setting switches, such as a dip switch, for example, and it is good also as a structure which a user sets schedule data using a setting switch.

  Similarly to the dimming control unit 17, the dimming control unit 17 a is configured to turn on the discharge lamp 5 at a dimming ratio corresponding to the count value of the zero cross timing stored in the lighting time storage unit 15. In addition to outputting a control signal, the discharge lamp 5 is turned on, turned off, dimmed, etc. based on the control contents of the schedule data corresponding to the schedule count value with reference to the schedule management counter 20 and the schedule setting unit 21. In order to achieve this, a control signal is output to the inverter control circuit 9.

  Similarly to the lighting time counter 14 shown in FIG. 3, the lighting time counter 14a cumulatively stores the count value of the zero cross timing of the AC voltage Vac in the lighting time storage unit 15, and the dimming control unit 17a causes the discharge lamp 5 to In the extinguished mode, the zero cross timing is not counted. Thereby, the lighting time counter 14a can count the time when the discharge lamp 5 is lit by the dimming control unit 17a as the cumulative lighting time.

  Next, operations of the lighting system 1a, the lighting fixture 2a, and the discharge lamp lighting device 6a configured as described above will be described. First, in FIG. 7, when the user turns on the switch SW1, the AC voltage Vac is simultaneously supplied to the plurality of lighting fixtures 2a installed in the room A, and the terminal block T1 of the discharge lamp lighting device 6a provided in each lighting fixture 2a. , T2 accepts AC voltage Vac.

  Next, in each discharge lamp lighting device 6a, power supply to the discharge lamp 5 is started in the same manner as the discharge lamp lighting device 6 shown in FIG. 3, and is stored in the lighting time storage unit 15 by the dimming control unit 17a. On the other hand, the discharge lamp 5 is lit at a dimming ratio corresponding to the count value of the zero cross timing (lighting in the initial illumination correction state), while the zero cross detection circuit 13 causes the detection signal Vout indicating the zero cross timing to be high in a pulse shape The level is output to the lighting time counter 14a. Further, the zero cross timing is counted by the lighting time counter 14 a and the counted value is accumulated and stored in the lighting time storage unit 15.

  Next, when the reset switch SW2 is turned on by the user together with the time signal at 8:00 am, the number of pulse signals of the detection signal Vout output from the zero cross detection circuit 13 by the schedule management counter 20 is changed to the schedule count value ( The second count value is counted from zero. In this case, the user may turn on the switch SW1 together with the time signal of 8:00 am instead of turning on the reset switch SW2 together with the time signal of 8:00 am.

  Next, based on the schedule count value of the schedule management counter 20 and the schedule data of the schedule setting unit 21, the dimming control unit 17a sets the schedule count value from 0 to 1439999, that is, from 8:00 to 12:00. During this period, the discharge lamp 5 is lit in the initial illuminance correction state and the schedule count value is 1440000 (corresponding to 4 hours) to 1799999, that is, from 12:00 to 13:00, the discharge lamp 5 reduces the current consumption. Therefore, the discharge lamp 5 is FULL-lit in the initial illuminance correction state and the schedule count value is 4320000 between the time when the dimming is performed and the schedule count value is 1800000 (corresponding to 5 hours) to 4319999, that is, before 13:00 to 20:00 (Corresponding to 12 hours) to 4679999, Between time ie 20 to before the 21 o'clock, the discharge lamp 5 is lit dimming order to reduce the current consumption, the schedule count value is 4680000, i.e. becomes 21:00, is turned off.

  As a result, the user can perform scheduled operations such as lighting, extinguishing, and dimming based on the schedule data of the schedule setting unit 21 only by turning on the switch SW1 or the reset switch SW2 in accordance with the time signal.

  In this case, the AC voltage Vac is supplied, and the zero cross timing is counted by each discharge lamp lighting device 6a based on the AC waveform of the same AC voltage Vac. The discharge lamp lighting device 6a uses the AC voltage Vac as a reference. Since the elapsed time from when the switch SW1 or the reset switch SW2 is turned on is measured in a synchronized state, the deviation of the schedule count value among the plurality of discharge lamp lighting devices 6a is reduced. As a result, each discharge lamp lighting device Differences in timing of lighting, extinguishing, and dimming operation based on schedule data between 6a are reduced, and the user is less confused and uncomfortable.

  In addition, by setting schedule data for 24 hours as the schedule data of the schedule setting unit 21, the switch SW1 or the reset switch SW2 is turned on once according to the time signal, and then daily schedule operation is continuously performed. It can also be done. In this case, the time accuracy of the schedule operation depends on the frequency of the AC voltage Vac, but since the frequency accuracy of the commercial power supply is about ± 0.1%, the accuracy is higher than the error of the oscillator ± 0.5%. The time accuracy of the schedule operation can be improved as compared with the discharge lamp lighting device 101 illustrated in FIG. 15 according to the background art.

(Third embodiment)
Next, an illumination system, an illumination fixture, and a discharge lamp lighting device according to a third embodiment of the present invention will be described. FIG. 9 is a diagram illustrating an example of a configuration of an illumination system according to the third embodiment of the present invention. The illumination system 1b shown in FIG. 9 is different from the illumination system 1 shown in FIG. 1 in that the illumination system 1b includes an illumination fixture 2b instead of the illumination fixture 2. 9 is different from the lighting fixture 2 shown in FIG. 2 in that the lighting fixture 2b includes a discharge lamp lighting device 6b instead of the discharge lamp lighting device 6. Since the other structure is the same as that of the lighting fixture 2 shown in FIG.

  FIG. 10 is a block diagram for explaining an example of the configuration of the discharge lamp lighting device 6b. The discharge lamp lighting device 6b shown in FIG. 10 differs from the discharge lamp lighting device 6 shown in FIG. 1 in the following points. That is, in the discharge lamp lighting device 6b shown in FIG. 10, the illuminance correction control unit 10b includes a dimming control unit 17b instead of the dimming control unit 17a, and a lighting control counter 20a instead of the schedule management counter 20. Instead of providing the schedule setting unit 21, a dip switch SW3 for setting a counter value is connected to the dimming control unit 17b.

  Since the other configuration is the same as that of the discharge lamp lighting device 6a shown in FIG.

  In the lighting control counter 20a, when the user turns on the switch SW1, the AC voltage Vac is supplied to the discharge lamp lighting device 6b, and the control power supply circuit 11 supplies the power supply voltage for circuit operation to the illuminance correction control unit 10b. Then, the pulse signal of the detection signal Vout output from the zero cross detection circuit 13 starts counting from zero as the lighting control count value (second count value). In this case, for example, if the AC voltage Vac is 50 Hz, one count of the lighting control count value corresponds to 10 msec, and the lighting control counter 20a measures the elapsed time after the switch SW1 is turned on. .

  The dimming control unit 17b compares the lighting control count value of the lighting control counter 20a with the count setting value set in the dip switch SW3 by the user, and turns on when the count value exceeds the count setting value. In order to light the discharge lamp 5 at a dimming ratio corresponding to the count value of the zero cross timing stored in the time storage unit 15, a control signal is output to the inverter control circuit 9 to light the discharge lamp 5.

  Next, operations of the lighting system 1b, the lighting fixture 2b, and the discharge lamp lighting device 6b configured as described above will be described. First, in the lighting system 1b shown in FIG. 9, for example, the user sets the dip switch SW3 of the lighting fixture 2b indicated by the group D in advance to the counter setting value “300” (corresponding to 3 seconds), and the lighting indicated by the group E. The dip switch SW3 of the fixture 2b is set to a counter set value “700” (corresponding to 7 seconds), and the dip switch SW3 of the luminaire 2b shown as group F is set to a counter set value “1100” (corresponding to 11 seconds). Keep it. Thereby, the counter setting value of the dip switch SW3 is set to a larger counter setting value for the lighting fixtures 2b belonging to the group farther from the entrance of the room A.

  Next, in FIG. 9, when the user turns on the switch SW1, the AC voltage Vac is started to be supplied simultaneously to the plurality of lighting fixtures 2b installed in the room A, and the terminal block of the discharge lamp lighting device 6b provided in each lighting fixture 2b. AC voltage Vac is accepted by T1 and T2, and in each discharge lamp lighting device 6b shown in FIG. 10, counting of the zero cross timing is started by the lighting control counter 20a. The dimming control unit 17b is in the extinguishing mode until the count value of the lighting control counter 20a reaches the count set value set in the dip switch SW3.

  FIG. 11 is a timing chart for explaining the operation of the discharge lamp lighting device 6b belonging to each of the groups D, E, and F. First, when the count value of the lighting control counter 20a in each discharge lamp lighting device 6b reaches “300” (3 seconds), the dimming control unit in the discharge lamp lighting device 6b of the group D closest to the entrance of the room A 17b, a control signal is output to the inverter control circuit 9 to light the discharge lamp 5 at a dimming ratio corresponding to the count value of the zero cross timing stored in the lighting time storage unit 15, and the discharge lamp 5 Lights in the correction state.

  Next, when the count value of the lighting control counter 20a in each discharge lamp lighting device 6b reaches “700” (7 seconds), in the discharge lamp lighting devices 6b of the group E that is next to the group D from the entrance of the room A. The dimming control unit 17b outputs a control signal to the inverter control circuit 9 to turn on the discharge lamp 5 at a dimming ratio corresponding to the count value of the zero cross timing stored in the lighting time storage unit 15, The electric lamp 5 is turned on in the initial illuminance correction state.

  Next, when the count value of the lighting control counter 20a in each discharge lamp lighting device 6b reaches “1100” (11 seconds), the adjustment is performed in the discharge lamp lighting devices 6b of the group F farthest from the entrance of the room A. The light control unit 17b outputs a control signal to the inverter control circuit 9 to turn on the discharge lamp 5 at a dimming ratio corresponding to the count value of the zero cross timing stored in the lighting time storage unit 15, and the discharge lamp 5 Lights up in the initial illumination correction state.

  Thereby, the discharge lamp lighting device 6b can change the time from when the user turns on the switch SW1 until the discharge lamp 5 is lit according to the count set value set in the dip switch SW3. Therefore, for example, when the user sets the counter setting value of the dip switch SW3 in advance so that the lighting apparatus 2b belonging to the group far from the entrance of the room A has a larger value, the user can set the switch setting value. When SW1 is turned on, the discharge lamp 5 is lit as it goes from the front to the back, so that a simple effect can be obtained.

  As shown in FIG. 12, for example, various sensors such as a human body sensor S1 including a pyroelectric sensor may be used instead of the switch SW1 in the illumination system 1b. Moreover, although the dimming control part 17b showed the example which makes the discharge lamp 5 light when the count value of the lighting control counter 20a reaches the count set value set in the DIP switch SW3, it has reached the count set value. In such a case, the discharge lamp 5 may be turned off.

(Fourth embodiment)
Next, a lighting system, a lighting fixture, and a discharge lamp lighting device according to a fourth embodiment of the present invention will be described.

  Conventionally, when a discharge lamp is lit, a preheating process for facilitating the start of discharge by preheating the filament of the discharge lamp and a voltage for starting discharge light emission to the discharge lamp after applying the preheating process for a predetermined time are applied. 2. Description of the Related Art There is known a discharge lamp lighting device including a lighting sequence for performing a starting process and a lighting process for causing the discharge lamp to perform steady discharge light emission after the starting process is continued for a predetermined time. FIG. 16 is a circuit diagram of a timing generation circuit that generates the timing of the lighting sequence in the discharge lamp lighting device according to the background art.

  The timing generation circuit 114 shown in FIG. 16 includes a constant current output circuit 115 including, for example, a constant current power source, a current mirror circuit, a constant current source CTA, and the like, and a capacitor 116 charged by the constant current from the constant current output circuit 115. And the voltage dividing resistors 117, 118, and 119 for generating the reference voltages Vy and Vs for detecting the start timing of the starting process and the lighting process by dividing the power supply voltage, and the charging voltage Vc of the capacitor 116 is the reference voltage Vy. A comparator 120 that outputs a START signal indicating the start timing of the starting process when exceeded, and a comparator 121 that outputs a LIGHT signal indicating the start timing of the lighting process when the charging voltage Vc of the capacitor 116 exceeds the reference voltage Vs; It has.

  And, as shown in FIG. 17, in the discharge lamp lighting device according to such a background art, when the power is turned on, it becomes a preheating step, while charging of the capacitor 116 is started and the charging voltage Vc is increased. When the charging voltage Vc reaches the reference voltage Vy, the process proceeds to the starting process, and when the charging voltage Vc reaches the reference voltage Vs, the process proceeds to the lighting process. In a discharge lamp lighting device using such a timing generation circuit 114, the lighting sequence timing varies due to variations in the capacitance of the capacitor 116. Therefore, when a plurality of discharge lamp lighting devices having such a lighting sequence are installed in the same space, after the switch is turned on, depending on the discharge lamp lighting device, for example, a variation of about several hundred msec is required. May occur, and the user may feel uncomfortable.

  FIG. 13 is a diagram illustrating an example of a configuration of an illumination system according to the fourth embodiment of the present invention. The illumination system 1 shown in FIG. 1 is different from the illumination system 1c shown in FIG. 13 in that the illumination system 1c includes an illumination fixture 2c instead of the illumination fixture 2. 13 differs from the lighting fixture 2 shown in FIG. 2 in that the lighting fixture 2c includes a discharge lamp lighting device 6c instead of the discharge lamp lighting device 6. Since the other structure is the same as that of the lighting fixture 2 shown in FIG.

  FIG. 14 is a block diagram for explaining an example of the configuration of the discharge lamp lighting device 6c. The discharge lamp lighting device 6c shown in FIG. 14 is different from the discharge lamp lighting device 6 shown in FIG. 3 in the following points. That is, the discharge lamp lighting device 6c shown in FIG. 14 includes a dimming control unit 17c instead of the dimming control unit 17, and the illuminance correction control unit 10c further includes a lighting sequence counter 20b.

  Since the other configuration is the same as that of the discharge lamp lighting device 6 shown in FIG. 3, the description thereof will be omitted, and the characteristic points of the present embodiment will be described below.

  When the user turns on the switch SW1, the lighting sequence counter 20b is supplied with the AC voltage Vac to the discharge lamp lighting device 6c, and the control power supply circuit 11 supplies the power supply voltage for circuit operation to the illuminance correction control unit 10. Then, the counting of the pulse signal of the detection signal Vout output from the zero cross detection circuit 13 is started from zero as a sequence count value (third count value). In this case, for example, if the AC voltage Vac is 50 Hz, one count of the schedule count value corresponds to 10 msec, and the lighting sequence counter 20b measures the elapsed time after the switch SW1 is turned on.

  The dimming control unit 17c executes a lighting sequence for lighting the discharge lamp 5 based on the count value of the lighting sequence counter 20b. Specifically, the dimming control unit 17c sets in advance to indicate a start start count value that is set in advance to indicate the timing for starting the discharge light emission of the discharge lamp 5, and to indicate the timing to cause the discharge lamp 5 to emit light in a steady state. The lighting start count value thus obtained is compared with the sequence count value of the lighting sequence counter 20b, and the filaments F1 and F2 are preheated by a preheating circuit (not shown) until the sequence count value reaches the start start count value. When the sequence count value reaches the start start count value, a control signal is output to the inverter control circuit 9 to start the discharge light emission to the discharge lamp 5 and the voltage for starting the discharge light emission is supplied from the inverter control circuit 9 to the discharge lamp 5. When the sequence count value reaches the lighting start count value, zero stored in the lighting time storage unit 15 In order to light the discharge lamp 5 at the dimming ratio corresponding to the count value of the loss timing, and outputs a control signal to the inverter control circuit 9, to light the discharge lamp 5.

  Next, operations of the lighting system 1c, the lighting fixture 2c, and the discharge lamp lighting device 6c configured as described above will be described. First, in FIG. 13, when the user turns on the switch SW1, the AC voltage Vac is simultaneously supplied to the plurality of lighting fixtures 2c installed in the room A, and the terminal block T1 of the discharge lamp lighting device 6c provided in each lighting fixture 2c. , T2 accepts AC voltage Vac.

  Next, referring to FIG. 14, in each discharge lamp lighting device 6c, the lighting sequence counter 20b starts counting the zero cross timing as a sequence count value. The filaments F1 and F2 are preheated by a preheating circuit (not shown) until the sequence count value of the lighting sequence counter 20b reaches the start start count value.

  Next, when the sequence count value of the lighting sequence counter 20b reaches the start start count value, the dimming control unit 17c outputs a control signal to the inverter control circuit 9 to start the discharge light emission in the discharge lamp 5, and the inverter A voltage for starting discharge emission is supplied from the inverter circuit 8 to the discharge lamp 5 in accordance with the control signal output from the control circuit 9.

  Next, when the sequence count value of the lighting sequence counter 20b reaches the lighting start count value, the dimming control unit 17c uses the dimming ratio corresponding to the count value of the zero cross timing stored in the lighting time storage unit 15. In order to light the discharge lamp 5, a control signal is output to the inverter control circuit 9, and the discharge lamp 5 is lighted in the initial illuminance correction state.

  In this case, in the illumination system 1c shown in FIG. 13, when the switch SW1 is turned on by the user, each discharge lamp lighting device 6c counts the zero cross timing based on the AC waveform of the same AC voltage Vac. Since the elapsed time after the switch SW1 is turned on is measured as the sequence count value of the lighting sequence counter 20b in a state in which the lighting device 6c is synchronized with the AC voltage Vac as a reference, the interval between the plurality of discharge lamp lighting devices 6c is measured. As a result of suppressing the deviation in the timing of starting discharge light emission and the timing of starting lighting in the initial illuminance correction state to less than ½ of the power cycle (10 msec at 50 Hz), giving the user a sense of discomfort is reduced.

It is a figure which shows an example of a structure of the illumination system which concerns on the 1st Embodiment of this invention. It is a perspective view which shows an example of the external appearance of the lighting fixture shown in FIG. It is a block diagram for demonstrating an example of a structure of the discharge lamp lighting device stored in the inside of the lighting fixture main body shown in FIG. It is a circuit diagram which shows an example of a structure of a zero cross detection circuit. FIG. 5 is a diagram for explaining the operation of the zero-cross detection circuit shown in FIG. 4. It is a figure for demonstrating the time measurement error of the cumulative lighting time between the some discharge lamp lighting devices shown in FIG. It is a figure which shows an example of a structure of the illumination system by the 2nd Embodiment of this invention. It is a block diagram for demonstrating an example of a structure of the discharge lamp lighting device shown in FIG. It is a figure which shows an example of a structure of the illumination system by the 3rd Embodiment of this invention. It is a block diagram for demonstrating an example of a structure of the discharge lamp lighting device shown in FIG. It is a timing chart for demonstrating operation | movement of the discharge lamp lighting device shown in FIG. It is a figure which shows the modification which used the sensor as a switch in the illumination system shown in FIG. It is a figure which shows an example of a structure of the illumination system by the 4th Embodiment of this invention. It is a block diagram for demonstrating an example of a structure of the discharge lamp lighting device shown in FIG. It is a block diagram for demonstrating the structure of the discharge lamp lighting device which concerns on background art. It is a circuit diagram of the timing generation circuit which produces | generates the timing of the lighting sequence in the discharge lamp lighting device which concerns on background art. FIG. 17 is a diagram for explaining the operation of the timing generation circuit shown in FIG. 16.

Explanation of symbols

1, 1a, 1b, 1c Lighting system 2, 2a, 2b, 2c Lighting fixture 5 Discharge lamp 6, 6a, 6b, 6c Discharge lamp lighting device 7 Diode bridge 8 Inverter circuit 9 Inverter control circuit 10, 10a, 10b, 10c Illuminance Correction control unit 11 Control power supply circuit 12 Oscillator 13 Zero cross detection circuit 14, 14a Lighting time counter (counting unit)
15 lighting time storage unit 16 dimming table 17 dimming control unit 17a, 17b dimming control unit (schedule control unit)
17c Light control unit 18 Notification unit 19 Comparator 20 Schedule management counter (counting unit)
20a Counter for lighting control (counter)
20b Counter for lighting sequence (counter)
21 Schedule setting part (setting part)
S1 human body sensor SW1 switch (counting instruction receiving means)
SW2 reset switch (counting instruction receiving means)
SW3 DIP switch (setting unit)
T1, T2 terminal block (power supply reception part)

Claims (8)

A discharge lamp lighting device comprising a power supply receiving unit for receiving an input of an AC power supply, and causing the discharge lamp to emit light by supplying power obtained from the AC power supply received by the power supply receiving unit to the discharge lamp,
A counting unit for counting periodic feature points of the AC power supply voltage waveform received by the power supply receiving unit;
A discharge lamp lighting device comprising: a dimming control unit that adjusts the brightness of the discharge lamp according to the first count value cumulatively counted by the counting unit.   2. The discharge lamp according to claim 1, wherein the dimming control unit adjusts the brightness of the discharge lamp so as to suppress a decrease in brightness with the passage of light emission time in the discharge lamp. Lighting device. The dimming control unit has a turn-off mode for turning off the discharge lamp in a state where the input of the AC power supply is received by the power supply receiving unit,
The discharge lamp lighting device according to claim 1, wherein the counting unit does not count the first count value in the extinguishing mode.   When the first count value is equal to or greater than a lifetime determination value set in advance as a value indicating the lifetime of the discharge lamp, the first count value further includes a notifying unit for notifying that the discharge lamp has reached the lifetime. The discharge lamp lighting device according to claim 1. Further comprising a count instruction receiving means for receiving a count start instruction for instructing a count start of the second count value for controlling the brightness of the discharge lamp;
The counting unit further starts counting the feature points as the second count value when the counting start instruction is received by the counting instruction receiving unit,
The dimming control unit is set in the setting unit and a setting unit for setting adjustment contents for adjusting the brightness of the discharge lamp according to the second count value by the counting unit. The schedule control part which adjusts the brightness of the discharge lamp according to the 2nd count value by the counting part based on the contents of adjustment is further provided. The discharge lamp lighting device according to 1. When the input of the AC power supply is received by the power supply receiving unit, further comprising a preheating unit for starting preheating of the filament for lighting in the discharge lamp,
The counting unit further starts counting the feature points as a third count value when the input of the AC power supply is received by the power receiving unit,
The dimming control unit is configured to start light emission of the discharge lamp when the third count value counted by the counting unit reaches a preset start determination value. The discharge lamp lighting device according to any one of claims 1 to 5.   A lighting fixture comprising a discharge lamp and a discharge lamp lighting device for lighting the discharge lamp, wherein the discharge lamp lighting device is the discharge lamp lighting device according to any one of claims 1 to 6. . A plurality of discharge lamp lighting devices that respectively supply power to a plurality of discharge lamps;
A switch for collectively turning on and off the supply of AC power to the plurality of discharge lamp lighting devices,
The lighting system according to claim 1, wherein the plurality of discharge lamp lighting devices are the discharge lamp lighting devices according to claim 1.

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