JP4506480B2 - Light control device - Google Patents

Description

  The present invention relates to a light control device that performs light control of a light source (lighting fixture) installed in a stage, a studio, a hall, or the like.

JP 2000-311791 A

  For example, Patent Document 1 proposes a dimming device including a plurality of dimmers (DIMMERS) that perform dimming of a plurality of light sources by adjusting AC power. In such a dimmer, one light source is connected to one dimmer.

  By the way, in such a light control apparatus, since one light source is connected with respect to one light controller, it is difficult to light-control each light source more than the number of several light control devices, If the light source includes a large light source that consumes more power than the rated power (rated load) of each of the plurality of dimmers, it becomes more difficult to dim each of the plurality of light sources. Further, in such a light control device, if a dimmer having a rated power corresponding to the power consumption of the light source is added, it is difficult to reduce the size and cost of the light control device itself.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a light control device that can control light from a plurality of light sources and that can be reduced in size and cost. It is in.

  The light control device of the present invention includes a plurality of AC power supply sources, a small light source connection state in which each of the plurality of AC power supply sources is independently connected to each of the plurality of small light sources, and a plurality of AC power supply sources. Switching means for selectively switching between a large light source connected state connected in parallel to a large light source that consumes more power than a plurality of small light sources, and a plurality of small light sources and large light sources from a plurality of AC power supply sources, respectively. Control means for controlling the supply period of AC power to the control means, the control means is a length of each supply period of AC power that each of a plurality of AC power supply sources independently supplies to a plurality of small light sources Is supplied to each of the plurality of AC power supply sources connected to the small light source while the AC power supply to the large light source is applied to the plurality of AC power supply sources connected to the large light source over time. Multiple AC power supplies AC power supply in which each source is responsible for alternating supply of AC power to the large light source for each of the plurality of AC power supply sources and is responsible for supplying AC power from the large light source There is provided a command unit that gives an adjustment command to the AC power supply source for adjusting the length of the supply period of the AC power supplied to the large light source by the source during the assigned period.

  According to the light control device of the present invention, in particular, switching means for selectively switching between the small light source connection state and the large light source connection state, and the supply period of AC power to each of the plurality of small light sources and the large light source are controlled. Control means, and the control means provides a small adjustment command for adjusting the length of each supply period of AC power supplied independently by a plurality of AC power supply sources to a plurality of small light sources, respectively. A plurality of AC power supplies are provided to each of the plurality of AC power supply sources connected to the light source, while the AC power supply to the large light source is shared over time with the plurality of AC power supply sources connected to the large light source. AC power for each of the plurality of AC power supply sources is set for each of the plurality of AC power supply sources and AC power for supplying the AC light from the large light source. Within the period of charge Since there is a command section for giving an adjustment command for adjusting the length of the supply period of the AC power supplied to the light source to the AC power supply source, the number of light sources equal to or more than the number of AC power supply sources (Including small light sources and large light sources) can be dimmed, and multiple AC power supply sources with small rated power (rated load) can be dimmed to large light sources with large rated power (rated power consumption) Therefore, the light control device itself can be reduced in size and cost. In addition, according to the light control device of the present invention, the supply of AC power to the large light source can be shared over time with a plurality of AC power supply sources, and each of the plurality of AC power supply sources to the large light source. Thus, it is possible to eliminate the overlapping of the AC power supply periods, and to reduce the heat generation of the plurality of AC power supply sources based on the mutual voltage error of the plurality of AC power supply sources.

  In a preferred example of the light control device of the present invention, the command unit may be configured to set a charge period having a time length equal to each other for each of the plurality of AC power supply sources, The command unit may set a charge period having a time length equal to the period of the AC power to be supplied to the large light source for each of the plurality of AC power supply sources. . According to such a preferable example, it becomes easy to adjust the AC power supplied from each of the plurality of AC power supply sources to the large light source.

  In a preferred example of the light control device of the present invention, the command unit sets one charge period for one AC power supply source among a plurality of AC power supply sources, and synchronizes with the end of one charge period. Then, another charge period for starting the progress may be set for the other AC power supply source among the plurality of AC power supply sources. Composed of first to third AC power supply sources, the command unit sets the first charge period for the first AC power supply source and starts progressing in synchronization with the end of the first charge period The second charge period is set for the second AC power supply source, and the third charge period starting to proceed in synchronization with the end of the second charge period is set as the third AC power supply source. It may be set for each.

  In the light control device of the present invention, the plurality of AC power supply sources may be composed of two AC power supply sources, or may be composed of two or more AC power supply sources. It may consist of three or four AC power sources.

  ADVANTAGE OF THE INVENTION According to this invention, the light control apparatus which can light-control a some light source and can aim at size reduction and cost reduction can be provided.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 9, the dimming device 1 of this example includes a plurality of AC power supply sources 4a, 4b, and 4c, and each of the AC power supply sources 4a, 4b, and 4c is a small light source 2a, 2b, and 2c, respectively. As shown in FIG. 3, the small light source connected state and the AC power supply sources 4a, 4b, and 4c are each one large light source 3 that consumes more power than the small light sources 2a, 2b, and 2c. The switching means 5 for selectively switching the large light source connection state as shown in FIG. 7 connected in parallel with each other, the AC power supply sources 4a, 4b and 4c to the small light sources 2a, 2b and 2c and the large light source 3 respectively. And control means 6 for controlling the AC power supply periods t1, t2 and t3.

  An AC power supply 11 that inputs AC power to each of the AC power supply sources 4a, 4b, and 4c is connected to the AC power supply sources 4a, 4b, and 4c via a feeder line 23. In this example, the AC power supply 11 is a commercial power supply of 50 Hz or 60 Hz. The small light sources 2a, 2b and 2c and the large light source 3 are composed of, for example, a halogen lamp. The rated power consumption of each of the small light sources 2a, 2b, and 2c is 1 kW in this example. The rated power consumption of the large light source 3 is 3 kW in this example. The small light sources 2a, 2b and 2c and the large light source 3 are supplied with AC power from the AC power source 11 via the AC power supply sources 4a, 4b and 4c and the switching means 5, respectively. The small light sources 2a, 2b, and 2c mean power consumption that is relatively smaller than that of the large light source 3.

  The AC power supply sources 4a, 4b and 4c are connected to the AC power source 11 and the switching means 5 via the feeder line 23 and connected to the control means 6 via the signal line 24, etc. Each of the switch elements 22 is provided. The AC power supply sources 4a, 4b, and 4c are turned off by the trigger signals (including the CH1 trigger signal 61, the CH2 trigger signal 62, and the CH3 trigger signal 63) as the adjustment commands from the control means 6, respectively. By being turned on and turned from the on state to the off state, AC power from the AC power supply 11 is supplied to the small light sources 2a, 2b and 2c and the large light source 3, respectively.

  Each of the AC power supply sources 4a, 4b and 4c is assigned a channel (CH) in relation to the control means 6. In this example, the AC power supply source 4a is assigned CH1, and the AC power supply The source 4b is assigned CH2, and the AC power supply source 4c is assigned CH3. The rated power (rated load) of each of the AC power supply sources 4a, 4b, and 4c is 1 kW in this example.

  The switching means 5 includes a plurality of switching devices 21a, 21b and 21c interposed between the AC power supply sources 4a, 4b and 4c, the small light sources 2a, 2b and 2c and the large light source 3. The switches 21a, 21b, and 21c are embodied by, for example, thyristors. In this example, the switching devices 21a, 21b, and 21c are simultaneously operated based on a switching signal from a switching command unit 35 described later. For example, the switching devices 21a, 21b, and 21c are operated. It may be connected to a manual switching operation unit (not shown) that generates a switching signal composed of a pulse signal by manual operation. The switching means 5 is mechanically switched from the large light source connection state to the small light source connection state by manual operation of a switching operation lever or the like instead of the switching devices 21a, 21b and 21c. On the other hand, a plurality of switches that mechanically switch from the small light source connected state to the large light source connected state may be provided.

  The switch 21a is connected to the switch element 22 of the AC power supply source 4a, the small light source 2a, and the large light source 3 via the feeder line 23, and is connected to the switching command unit 35 via the signal line 24. The connection to the large light source 3 of the AC power supply source 4a is switched to the connection to the small light source 2a by operating in response to a switching signal from the switching command unit 35, while the connection of the AC power supply source 4a to the small light source 2a is large. The connection to the light source 3 is switched. The switch 21b is connected to the switch element 22 of the AC power supply source 4b, the small light source 2b, and the large light source 3 via the feeder line 23, and is connected to the switching command unit 35 via the signal line 24. Actuated by a switching signal from the switching command unit 35, the connection of the AC power supply source 4b to the large light source 3 is switched to the connection to the small light source 2b, while the connection of the AC power supply source 4b to the small light source 2b is large. The connection to the light source 3 is switched. The switch 21c is connected to the switch element 22 of the AC power supply source 4c, the small light source 2c, and the large light source 3 via the feeder line 23, and is connected to the switching command unit 35 via the signal line 24. The connection to the large light source 3 of the AC power supply source 4c is switched to the connection to the small light source 2c by operating in response to a switching signal from the switching command unit 35, while the connection of the AC power supply source 4c to the small light source 2c is large. The connection to the light source 3 is switched.

  As shown in FIG. 2, the control means 6 receives a so-called DMX (Digital Multiplex) signal (including DMX256 signal and DMX512 signal) as a dimming signal generated based on the operation of the dimming console 29 or the like. And the AC power supply periods t1 and t2 supplied independently by the AC power supply sources 4a, 4b and 4c to the small light sources 2a, 2b and 2c based on the DMX signal received by the receiver 31 and the DMX signal received by the receiver 31, respectively. And a trigger signal as an adjustment command for adjusting the lengths of t3 to the small light source connected AC power supply sources 4a, 4b and 4c, respectively, while supplying the AC light to the large light source 3 Each of the AC power supply sources 4a, 4b, and 4c supplies AC power to the large light source 3 so that the AC power supply sources 4a, 4b, and 4c in the large light source connected state are shared over time. AC power supply sources in charge of supply of AC power from the large light source 3 while setting charge periods T1, T2 and T3 in charge of supply of AC power to the AC power supply sources 4a, 4b and 4c. Trigger signals as adjustment commands for adjusting the lengths of the supply periods t1, t2 and t3 of the AC power supplied to the large light source 3 in the respective assigned periods T1, T2 and T3 by the 4a, 4b and 4c A switching unit 21a, 21b, and a command unit 33 that is supplied to the power supply sources 4a, 4b, and 4c, and a switching signal between the small light source connection state and the large light source connection state of the AC power supply sources 4a, 4b, and 4c are generated. And a switching command section 35 that gives a switching command to the switching means 5 by transmitting to 21c.

  The command unit 33 operates the switch element 22 of the AC power supply source 4a (ON / OFF operation), the CH1 trigger signal 61, the CH2 trigger signal 62 that operates the switch element 22 of the AC power supply source 4b, and the switch of the AC power supply source 4c. 4, 6, and 8 based on the AC signal from the trigger signal generating unit 41 that generates the CH3 trigger signal 63 that operates the element 22 and the AC power supply 11 that is input to the AC power supply sources 4 a, 4 b, and 4 c. 9 and a synchronous signal generator 42 for generating a synchronous signal 64 composed of a pulse signal at the start and end of each period T of the AC voltage waveform 30 as shown in FIG. 9, and a DMX signal and a synchronous signal generated by the receiver 31. Based on the synchronization signal 64 generated by the unit 42, the trigger signal generating unit 41 generates a CH1 trigger signal 61, a CH2 trigger signal 62, and a CH3 trigger signal. It is provided with an adjustment unit 43 for adjusting the timing of each of rise to 3.

  The trigger signal generating unit 41 is connected to the respective switch elements 22 of the AC power supply sources 4a, 4b, and 4c via different signal lines 24, and CH1 trigger signals 61, CH2 according to the timing adjustment of the adjustment unit 43. A trigger signal 62 and a CH3 trigger signal 63 are generated, respectively.

  As shown in FIGS. 4, 5, and 8, the trigger signal generating unit 41 switches the switching element 22 of the AC power supply source 4 a from the OFF state to the ON state by the first CH1 trigger signal 61 a within the period T, and The switch element 22 of the AC power supply source 4a is changed from the on state to the off state by the second CH1 trigger signal 61b within the period T. As shown in FIGS. 4 and 8, the trigger signal generating unit 41 switches the switching element 22 of the AC power supply source 4b from the OFF state to the ON state by the first CH2 trigger signal 62a within the cycle T, and within the cycle T. The switch element 22 of the AC power supply source 4b is changed from the on state to the off state by the second CH2 trigger signal 62b in FIG. As shown in FIGS. 4 and 8, the trigger signal generating unit 41 switches the switching element 22 of the AC power supply source 4c from the OFF state to the ON state by the first CH3 trigger signal 63a in the cycle T, and within the cycle T. The switch element 22 of the AC power supply source 4c is changed from the ON state to the OFF state by the second CH3 trigger signal 63b in FIG.

  The synchronization signal generating unit 42 includes a detection unit (not shown) that detects the period T of the AC power from the AC power supply 11, and generates the synchronization signal 64 based on the detection result of the detection unit. It is like that. The synchronization signal 64 generated by the synchronization signal generation unit 42 is transmitted to the adjustment unit 43.

  The adjustment unit 43 includes a storage unit 51 that stores a preset program in a freely readable manner, an arithmetic processing unit 52 that reads out the program from the storage unit 51 and performs arithmetic processing based on the read program, a charge period T1, And a counter 53 that counts the progress of T2 and T3 and the supply periods t1, t2, and t3. The arithmetic processing unit 52 is based on the DMX signal received by the receiving unit 31, the synchronization signal 64 generated by the synchronization signal generating unit 42, the program read from the storage unit 51, and information related to the count of the counting unit 53 described above and below. Such judgment, setting, identification, and instruction are performed.

  The adjustment unit 43 dimmes the small light source dimming information for dimming at least one of the small light sources 2a, 2b, and 2c and the large light source 3 to the DMX signal received by the reception unit 31. The large light source dimming information is included, and if it is determined that the DMX signal received by the receiving unit 31 includes the small light source dimming information, the small light source to be dimmed Supply of light quantity information indicating at least one light quantity of 2a, 2b, and 2c from the DMX signal received by the receiving unit 31, and supply for each period T necessary to obtain the light quantity indicated in the identified light quantity information At least one of the periods t1, t2, and t3 is set, and a period T is set in the trigger signal generating unit 41 in synchronization with the start of at least one of the set supply periods t1, t2, and t3. The first time in A trigger signal generation command is given, and a trigger signal generation command for the second time within the period T is given to the trigger signal generation unit 41 in synchronization with the end of at least one of the set supply periods t1, t2, and t3. It has become.

  When the adjustment unit 43 determines that the DMX signal received by the reception unit 31 includes information indicating that the small light source 2a is dimmed, the adjustment unit 43 provides light amount information indicating the amount of light to be dimmed by the small light source 2a. It identifies from the DMX signal received by the receiving unit 31, sets a supply period t1 for each period T necessary to obtain the light quantity indicated in the identified light quantity information, and synchronizes with the start of progress of the set supply period t1 A trigger signal generation command for the first time of the CH1 trigger signal 61 within the cycle T is given to the trigger signal generation unit 41, and the CH1 trigger signal within the cycle T is sent to the trigger signal generation unit 41 in synchronization with the end of the set supply period t1. 61, a second trigger signal generation instruction is given. When the adjustment unit 43 determines that the DMX signal received by the reception unit 31 includes information indicating that the small light source 2b is dimmed, the adjustment unit 43 displays light amount information indicating the amount of light to be dimmed by the small light source 2b. It identifies from the DMX signal received by the receiving unit 31, sets a supply period t2 for each period T necessary for obtaining the light quantity indicated in the identified light quantity information, and synchronizes with the start of progress of the set supply period t2. A trigger signal generation command for the first time of the CH2 trigger signal 62 within the cycle T is given to the trigger signal generation unit 41, and the CH2 trigger signal within the cycle T is transmitted to the trigger signal generation unit 41 in synchronization with the end of the set supply period t2. 62, a second trigger signal generation command is given. When the adjustment unit 43 determines that the DMX signal received by the reception unit 31 includes information indicating that the small light source 2c is to be dimmed, the adjustment unit 43 provides light amount information indicating the amount of light to be dimmed by the small light source 2c. It identifies from the DMX signal received by the receiving unit 31, sets a supply period t3 for each period T necessary for obtaining the light quantity indicated in the identified light quantity information, and synchronizes with the start of progress of the set supply period t3 A trigger signal generation command for the first time of the CH3 trigger signal 63 within the cycle T is given to the trigger signal generation unit 41, and the CH3 trigger signal within the cycle T is sent to the trigger signal generation unit 41 in synchronization with the end of the set supply period t3. 63, a second trigger signal generation command is given.

  When the adjusting unit 43 determines that the small light source dimming information is included in the DMX signal received by the receiving unit 31, the trigger signal generation of the CH1 trigger signal 61, the CH2 trigger signal 62, and the CH3 trigger signal 63 is generated. The commands are individually given to the trigger signal generating unit 41. In such a case, the respective trigger signal generating commands may overlap with each other over time. The trigger signal generation unit 41 to which a signal generation instruction is given may generate a CH1 trigger signal 61, a CH2 trigger signal 62, and a CH3 trigger signal 63, which overlap each other over time.

  When the adjusting unit 43 determines that the large light source dimming information is included in the DMX signal received by the receiving unit 31, the receiving unit 31 receives the light amount information indicating the amount of light to be dimmed by the large light source 3. A period of time T1 in which the AC power supply source 4a is in charge of supplying the AC power of the AC power supply 11 to the large light source 3 is identified from the DMX signal, and progress is started in synchronization with the end of the charge period T1 and the AC power supply 11 The AC power supply source 4b is in charge of supplying the AC power to the large light source 3 and starts to progress in synchronization with the end of the charge period T2 and the charge period T2, and the AC power supply 11 supplies the AC power to the large light source 3. Is alternately set in charge period T3 in which the AC power supply source 4c is in charge, and in the supply period t1 and the charge period T2 in the charge period T1 necessary for obtaining the light quantity indicated by the light quantity information identified from the DMX signal. Oke A supply period t3 in the supply period t2 and the assigned period T3 is set, and the first trigger signal of the CH1 trigger signal 61 in the assigned period T1 is sent to the trigger signal generating unit 41 in synchronization with the start of progress of the set supply period t1. A generation command is given, and a second trigger signal generation command for the CH1 trigger signal 61 in the assigned period T1 is given to the trigger signal generation unit 41 in synchronization with the end of the set supply period t1, and the progress of the set supply period t2 is progressed. A trigger signal generation instruction for the first time of the CH2 trigger signal 62 within the assigned period T2 is given to the trigger signal generating unit 41 in synchronization with the start, and the assigned period to the trigger signal generating unit 41 in synchronization with the end of the set supply period t2. Trigger the second trigger signal generation command of the CH2 trigger signal 62 within T2, and trigger in synchronization with the start of progress of the set supply period t3 The first trigger signal generation command for the CH3 trigger signal 63 in the charge period T3 is given to the signal generation section 41, and the CH3 trigger signal in the charge period T3 is sent to the trigger signal generation section 41 in synchronization with the end of the set supply period t3. 63, a second trigger signal generation command is given.

  The assigned periods T1, T2 and T3 set by the adjustment unit 43 have the same time length, and the period T of the AC power from the AC power supply 11 to be supplied to the large light source 3 Each has an equal length of time.

  The adjustment unit 43 starts and ends the progress of each of the assigned periods T1, T2, and T3 in synchronization with the synchronization signal 64 generated by the synchronization signal generation unit 42. The adjustment unit 43 starts the progress of the charge period T1 in synchronization with the end of the charge period T3, starts the progress of the charge period T2 in synchronization with the end of the charge period T1, and synchronizes with the end of the charge period T2. The progress of the charge period T3 is started.

  The adjustment unit 43 may start the progress of the supply periods t1, t2, and t3 in synchronization with the synchronization signal 64 generated by the synchronization signal generation unit 42. The progress of the supply periods t1, t2, and t3 may be started when a preset set time elapses from the synchronization signal 64. The adjusting unit 43 counts the progress of the supply periods t1, t2, and t3 by the counting unit 53, thereby allowing the CH1 trigger signal 61, the CH2 trigger signal 62, and the CH3 trigger signal 63 generated by the trigger signal generating unit 41 to be detected. The timing of each occurrence is adjusted. The maximum lengths of the supply periods t1, t2, and t3 are equal to the respective lengths of the assigned periods T1, T2, and T3, and are also equal to the length of the period T.

  The command unit 33 operates as described above and below to control the phase of each of the AC power supply sources 4a, 4b, and 4c. Output AC from the AC power supply sources 4a, 4b, and 4c when the AC power of the AC power supply 11 is supplied to the small light sources 2a, 2b, and 2c from the AC power supply sources 4a, 4b, and 4c by the dimmer 1 The voltages are output voltage waveforms 50a, 50b and 50c as shown in FIGS. When the dimmer 1 is alternately supplying the AC power of the AC power supply 11 from the AC power supply sources 4a, 4b and 4c to the large light source 3, the output AC voltage from the AC power supply sources 4a, 4b and 4c is The output voltage waveforms 50a, 50b and 50c are as shown in FIG. Further, the supplied AC power supplied to the large light source 3 by the dimming device 1 is composed of the AC power supplied alternately from the AC power supply sources 4a, 4b and 4c. A supply voltage waveform 55 as shown in FIG. 8 is obtained. Note that “AC INPUT” shown in FIGS. 4, 6, 8, and 9 means AC power from the AC power supply 11 input to the AC power supply sources 4a, 4b, and 4c. “AC OUTPUT” shown in FIG. 9 means the supplied AC power obtained by synthesizing AC power supplied from each of the AC power supply sources 4a, 4b, and 4c to the large light source 3.

  The switching command unit 35 is operated based on the determination result of the DMX signal by the adjustment unit 43. The switching command unit 35 issues a switching signal and simultaneously transmits the switching signal to each of the switching devices 21a, 21b, and 21c, thereby issuing a switching command to the switching unit 5. For example, when the adjustment unit 43 determines that the small light source dimming information is included in the DMX signal, the switching command unit 35 determines whether the AC power supply sources 4a, 4b, and 4c are in the small light source connection state. When it is determined that the small light source is connected, the operation is terminated without generating a switching signal, and when it is determined that the small light source is not connected, a switching signal is generated to generate the switching devices 21a and 21b. And 21c are transmitted simultaneously. In addition, for example, when the adjustment unit 43 determines that the large light source dimming information is included in the DMX signal, the switching command unit 35 determines whether the AC power supply sources 4a, 4b, and 4c are in the large light source connection state. When it is determined that the large light source is connected, the operation is terminated without generating a switching signal, and when it is determined that the large light source is not connected, the switching signal is generated to generate the switching device 21a. , 21b and 21c are transmitted simultaneously.

  Hereinafter, the dimming of the small light source 2a by the dimming device 1 of this example will be described in detail. First, the DMX signal generated based on the operation of the dimming console 29 or the like is received by the receiving unit 31. Here, the DMX signal generated based on the operation of the dimming console 29 or the like includes information for dimming the small light source 2a as the small light source dimming information for convenience of explanation. To do.

  Next, the adjusting unit 43 determines that the DMX signal received by the receiving unit 31 includes information indicating that the small light source 2a is dimmed, and receives light amount information indicating the amount of light to be dimmed by the small light source 2a. The supply period t1 for each period T required for obtaining the light quantity indicated by the identified light quantity information is set in relation to the length of the period T, which is identified from the DMX signal received by the unit 31, and thereby the period T and the supply A ratio (duty ratio) with the period t1 is also determined. The adjustment unit 43 monitors the start timing and end timing of the progress of the supply period t1 in relation to the cycle T of the AC power from the AC power supply 11 based on the synchronization signal 64 from the synchronization signal generating unit 42.

  The switching command unit 35 operates based on the determination result by the adjustment unit 43, and determines whether or not the AC power supply sources 4a, 4b, and 4c are in the small light source connection state via the switching devices 21a, 21b, and 21c, respectively. If it is determined that the small light source is connected, the operation is terminated without generating a switching signal, and if it is determined that the small light source is not connected, the switching signal is generated to generate the switching devices 21a, 21b, and It transmits to each of 21c simultaneously. In response to the switching signal from the switching command unit 35, the switching devices 21a, 21b, and 21c simultaneously connect the AC power supply sources 4a, 4b, and 4c to the small light sources 2a, 2b, and 2c, respectively.

  After the switching means 5 connects the AC power supply sources 4a, 4b, and 4c to the small light sources 2a, 2b, and 2c, the adjusting unit 43 causes the trigger signal generating unit 41 to synchronize the CH1 trigger signal 61 with the start of the period T. The first trigger signal generation command is given and the progress of the supply period t1 is started. The trigger signal generation unit 41 given the first trigger signal generation command generates the first CH1 trigger signal 61a within the period T and passes the signal line 24 to the switch element 22 of the AC power supply source 4a. Send. The switch element 22 of the AC power supply source 4a that has received the first CH1 trigger signal 61a is switched from the OFF state to the ON state, whereby the AC power supply source 4a supplies the AC power from the AC power source 11 to the small light source 2a. Is started. The supply of AC power to the started small light source 2a is continued while the adjustment unit 43 is counting the supply period t1. The adjustment unit 43 gives a trigger signal generation command for the second time of the CH1 trigger signal 61 to the trigger signal generation unit 41 in synchronization with the end of the supply period t1, and generates the trigger signal to which the second trigger signal generation command is given. The unit 41 generates the second CH1 trigger signal 61b within the period T and transmits it to the switch element 22 of the AC power supply source 4a via the signal line 24. The switch element 22 of the AC power supply source 4a that has received the second CH1 trigger signal 61b is changed from the ON state to the OFF state, thereby reducing the AC power of the AC power supply 11 by the AC power supply source 4a in one cycle T. Supply to the light source 2a is terminated. The command unit 33 performs light control of the small light source 2a according to the DMX signal received by the receiving unit 31 by repeating such an operation every period T. When the small light source 2a is dimmed, the adjustment unit 43 may change the supply period t1 every period T. In such a case, the output voltage based on the AC power output from the AC power supply source 4a. The waveform 50a is, for example, a waveform as shown in FIG.

  When the dimming device 1 receives a DMX signal including information indicating that the small light source 2b is dimmed, the dimming device 1 receives the information indicating that the small light source 2a is dimmed and receives the switching means 5 and the AC power. The switching means 5 and the AC power supply source 4b can be operated in the same manner as when the supply source 4a is operated, and when a DMX signal containing information for dimming the small light source 2c is received. Since the switching means 5 and the AC power supply source 4c can be operated in the same manner as when the switching means 5 and the AC power supply source 4a are operated by receiving information indicating that the small light source 2a is dimmed, Detailed description of the dimming of the small light sources 2b and 2c by the dimming device 1 will be omitted.

  Hereinafter, dimming of the large light source 3 by the dimming device 1 of this example will be described in detail. First, the DMX signal generated based on the operation of the dimming console 29 or the like is received by the receiving unit 31. Here, it is assumed that the DMX signal generated based on the operation of the dimming console 29 or the like includes large light source dimming information for convenience of explanation.

  Next, it is determined by the adjustment unit 43 that the DMX signal received by the reception unit 31 includes information indicating that the large light source 3 is dimmed, and the AC power supplied from the AC power supply 11 to the large light source 3 is changed to AC. A charge period T1 to be assigned to the power supply source 4a, and a charge period T2 to start the progress in synchronization with the end of the charge period T1 and to make the AC power supply source 4b take charge of supplying the AC power from the AC power supply 11 to the large light source 3 In addition, a period T3 in which the AC power supply source 4c is in charge of starting the progress in synchronism with the end of the charge period T2 and causing the AC power supply source 4c to handle the supply of the AC power from the AC power supply 11 is set alternately. The light amount information indicating the light amount to be dimmed is identified from the DMX signal received by the receiving unit 31, and the supply period t1 within the assigned period T1 and the assigned period T2 required to obtain the light amount indicated by the identified light amount information Offering in The supply period t3 within the period t2 and the assigned period T3 is set in relation to the respective lengths of the assigned periods T1, T2, and T3, whereby the assigned periods T1, T2, and T3 and the supply periods t1, t2, and t3 are set respectively. The ratio (duty ratio) is also determined. The lengths of the assigned periods T1, T2, and T3 are set to be equal to the length of the period T, respectively.

  The switching command unit 35 operates based on the determination result by the adjustment unit 43, and determines whether or not the AC power supply sources 4a, 4b, and 4c are in the large light source connection state via the switching devices 21a, 21b, and 21c, respectively. When it is determined that the large light source is connected, the operation is terminated without generating a switching signal, and when it is determined that the large light source is not connected, a switching signal is generated to generate the switching devices 21a, 21b, and It transmits to each of 21c simultaneously. The switches 21a, 21b and 21c receive the switching signal from the switching command unit 35 and connect the AC power supply sources 4a, 4b and 4c to the large light source 3 simultaneously with each other.

  After the connection of the AC power supply sources 4a, 4b and 4c to the large light source 3 by the switching means 5, the adjustment unit 43 starts to advance the set assigned period T1 in synchronization with the start of the period T, and the assigned period T1. In synchronization with the start of the progress, the trigger signal generation unit 41 is given a first trigger signal generation command for the CH1 trigger signal 61 and starts to progress in the set supply period t1. The trigger signal generating unit 41 given the first trigger signal generation command generates the first CH1 trigger signal 61a within the assigned period T1, and passes the signal line 24 to the switch element 22 of the AC power supply source 4a. To send. The switch element 22 of the AC power supply source 4a that has received the first CH1 trigger signal 61a is switched from the OFF state to the ON state, whereby supply of AC power from the AC power supply 11 to the large light source 3 by the AC power supply source 4a. Is started. The supply of AC power to the started large light source 3 is continued while the adjustment unit 43 is counting the supply period t1. The adjustment unit 43 gives a trigger signal generation command for the second time of the CH1 trigger signal 61 to the trigger signal generation unit 41 in synchronization with the end of the supply period t1, and generates the trigger signal to which the second trigger signal generation command is given. The unit 41 generates the second CH1 trigger signal 61b within the assigned period T1 and transmits it to the switch element 22 of the AC power supply source 4a via the signal line 24. The switch element 22 of the AC power supply source 4a that has received the second CH1 trigger signal 61b is changed from the ON state to the OFF state, whereby supply of AC power from the AC power supply 11 to the large light source 3 by the AC power supply source 4a. Is terminated. After the end of the supply period t1, the charge period T1 ends in synchronization with the end of the cycle T.

  The adjustment unit 43 starts the progress of the set charge period T2 in synchronization with the end of the charge period T1, and synchronizes with the start of the progress of the charge period T2 in the trigger signal generation unit 41 to the CH2 trigger signal 62. The trigger signal generation command for the second time is given and the progress of the set supply period t2 is started. The trigger signal generation unit 41 given the first trigger signal generation command generates the first CH2 trigger signal 62a in the assigned period T2 and passes the signal line 24 to the switch element 22 of the AC power supply source 4b. To send. The switch element 22 of the AC power supply source 4b that has received the first CH2 trigger signal 62a is switched from the OFF state to the ON state, whereby supply of AC power from the AC power supply 11 to the large light source 3 by the AC power supply source 4b. Is started. The started supply of AC power to the large light source 3 is continued while the supply period t2 is counted by the adjustment unit 43. The adjustment unit 43 gives a trigger signal generation command for the second time of the CH2 trigger signal 62 to the trigger signal generation unit 41 in synchronization with the end of the supply period t2, and generates the trigger signal to which the second trigger signal generation command is given. The unit 41 generates the second CH2 trigger signal 62b within the assigned period T2 and transmits it to the switch element 22 of the AC power supply source 4b via the signal line 24. The switch element 22 of the AC power supply source 4b that has received the second CH2 trigger signal 62b is switched from the ON state to the OFF state, whereby the AC power supply source 4b supplies the AC power from the AC power supply 11 to the large light source 3. Is terminated. After the end of the supply period t2, the charge period T2 ends in synchronization with the end of the cycle T.

  The adjustment unit 43 starts the progress of the set charge period T3 in synchronization with the end of the charge period T2, and synchronizes with the start of the progress of the charge period T3. A trigger signal generation command for the second time is given and the progress of the set supply period t3 is started. The trigger signal generating unit 41 given the first trigger signal generation command generates the first CH3 trigger signal 63a within the assigned period T3 and passes the signal line 24 to the switch element 22 of the AC power supply source 4c. To send. The switch element 22 of the AC power supply source 4c that has received the first CH3 trigger signal 63a is switched from the OFF state to the ON state, whereby supply of AC power from the AC power supply 11 to the large light source 3 by the AC power supply source 4c. Is started. The supply of AC power to the started large light source 3 is continued while the adjustment unit 43 is counting the supply period t3. The adjustment unit 43 gives a trigger signal generation command for the second time of the CH3 trigger signal 63 to the trigger signal generation unit 41 in synchronization with the end of the supply period t3, and generates the trigger signal to which the second trigger signal generation command is given. The unit 41 generates the second CH3 trigger signal 63b within the assigned period T3 and transmits it to the switch element 22 of the AC power supply source 4c via the signal line 24. The switch element 22 of the AC power supply source 4c that has received the second CH3 trigger signal 63b is switched from the ON state to the OFF state, whereby supply of AC power from the AC power supply 11 to the large light source 3 by the AC power supply source 4c. Is terminated. After the end of the supply period t3, the charge period T3 ends in synchronization with the end of the cycle T. The adjustment unit 43 starts the progress of the charge period T1 in synchronization with the end of the charge period T3, and supplies the AC power of the AC power supply 11 from the AC power supply source 4a to the large light source 3 as described above. After that, the AC power supply sources 4b and 4c in the responsible periods T2 and T3 sequentially supply the AC power of the AC power source 11 to the large light source 3 as described above, and thus the AC power supply source 4a, Dimming of the large light source 3 according to the DMX signal received by the receiving unit 31 is performed by repeating the supply of AC power to the large light source 3 by 4b and 4c while changing over time. When the large light source 3 is dimmed, the adjusting unit 43 may change the supply periods t1, t2, and t3 for each of the assigned periods T1, T2, and T3 that are alternately repeated. The output voltage waveforms 50a, 50b, and 50c based on the AC power output from the AC power supply sources 4a, 4b, and 4c are, for example, as shown in FIG.

  The command unit 33 assigns the AC power supply sources 4a, 4b, and 4c over time by setting the charge periods T1, T2, and T3, and the AC power supply sources 4a, 4b in the charge periods T1, T2, and T3, respectively. And 4c can be operated alternately to switch off the switching elements 22 of the AC power supply sources 4a, 4b and 4c for a long period of time in order to dim the large light source 3 according to the DMX signal. The burden on the AC power supply sources 4a, 4b and 4c can be reduced, and heat generation based on the mutual voltage error of the AC power supply sources 4a, 4b and 4c can be reduced.

  According to the light control device 1 of this example, the plurality of AC power supply sources 4a, 4b, and 4c and the AC power supply sources 4a, 4b, and 4c are independently connected to the small light sources 2a, 2b, and 2c, respectively. Selected between the small light source connection state and the large light source connection state in which each of the AC power supply sources 4a, 4b, and 4c is connected in parallel to the large light source 3 that consumes more power than each of the small light sources 2a, 2b, and 2c. Switching means 5 for switching automatically, and control means 6 for controlling supply periods t1, t2 and t3 of AC power from the AC power supply sources 4a, 4b and 4c to the small light sources 2a, 2b and 2c and the large light source 3, respectively. And the control means 6 determines the length of each of the AC power supply periods t1, t2 and t3 supplied independently by the AC power supply sources 4a, 4b and 4c to the small light sources 2a, 2b and 2c, respectively. Adjustment to adjust each The CH1 trigger signal 61, the CH2 trigger signal 62, and the CH3 trigger signal 63 as commands are supplied to the AC power supply sources 4a, 4b, and 4c in the small light source connected state, while supplying the AC power to the large light source 3. Each of the AC power supply sources 4a, 4b, and 4c takes charge of alternating supply of AC power to the large light source 3 so that the AC power supply sources 4a, 4b, and 4c in the large light source connection state are shared over time. The periods T1, T2, and T3 are set for the AC power supply sources 4a, 4b, and 4c, respectively, and the AC power supply sources 4a, 4b, and 4c that are in charge of supplying the AC power of the large light source 3 are in charge of each. CH1 trigger signals 61 and CH2 as adjustment commands for adjusting the lengths of the supply periods t1, t2 and t3 of the AC power supplied to the large light source 3 within the periods T1, T2 and T3. Since the command unit 33 that supplies the Riga signal 62 and the CH3 trigger signal 63 to the AC power supply sources 4a, 4b, and 4c is provided, the number of light sources (smaller) than the number of the AC power supply sources 4a, 4b, and 4c is small. The light sources 2a, 2b and 2c, including the large light source 3) can be dimmed, and the AC power supply sources 4a, 4b and 4c with small rated power (rated load) can be dimmed with large rated power (rated power consumption). Therefore, the light control device 1 itself can be reduced in size and cost. Further, according to the light control device 1, the supply of AC power to the large light source 3 can be shared over time with the AC power supply sources 4a, 4b, and 4c, and the AC power supply sources 4a, 4b, and 4c Overlap of the AC power supply periods t1, t2 and t3 from each to the large light source 3 can be eliminated, and thus AC power supply based on the mutual voltage error of the plurality of AC power supply sources 4a, 4b and 4c. The heat generation of the sources 4a, 4b and 4c can be reduced.

  According to the light control device 1, the command unit 33 sets the assigned periods T1, T2, and T3, which have the same time length, to the AC power supply sources 4a, 4b, and 4c, respectively. The command unit 33 is in charge of a voltage waveform and a current waveform based on the AC power to be supplied to the large light source 3, and in this example, has a time length equal to the period T of the AC voltage waveform 30. Since the periods T1, T2 and T3 are set for each of the AC power supply sources 4a, 4b and 4c, the AC supplied from the AC power supply sources 4a, 4b and 4c to the large light source 3 respectively. Power adjustment is easy.

  In addition, the light modulation apparatus 1 of this example may be equipped with two alternating current power supply sources by which the adjustment instruction | command by the instruction | command part 33 is performed instead of the three alternating current power supply sources 4a, 4b, and 4c, The control unit 33 may include four or more AC power supply sources for which adjustment commands are performed.

It is a conceptual explanatory view of an example of an embodiment of the invention. It is a conceptual explanatory drawing mainly of a control means of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is explanatory drawing of the voltage waveform and pulse signal regarding the example shown in FIG. It is explanatory drawing of the voltage waveform and pulse signal regarding the example shown in FIG. It is explanatory drawing of the voltage waveform and pulse signal regarding the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is explanatory drawing of the voltage waveform and pulse signal regarding the example shown in FIG. It is explanatory drawing of the voltage waveform and pulse signal regarding the example shown in FIG.

Explanation of symbols

1 Light control device 1
2a, 2b, 2c Small light source 3 Large light source 4a, 4b, 4c AC power supply source 5 Switching means 6 Control means 11 AC power source 33 Command section

Claims (5)

  A plurality of AC power supply sources, a small light source connection state in which each of the plurality of AC power supply sources is independently connected to each of a plurality of small light sources, and each of the plurality of AC power supply sources from a plurality of small light sources Switching means for selectively switching between a large light source connected in parallel to a large light source with high power consumption, a switching command to the switching means, and a plurality of small light sources and Control means for controlling the supply period of AC power to each of the light sources, and the switching means is interposed between the plurality of AC power supply sources, the plurality of small light sources, and the large light source, and is controlled. Based on a switching command from the means, the connection of the plurality of AC power supply sources to the respective large light sources is switched to the connection of the plurality of small light sources, while the plurality of small light sources of the plurality of AC power supply sources To each of A plurality of switches for switching the connection to the connection to the large light source, and the control means is a length of each supply period of the AC power supplied by the plurality of AC power supply sources independently to the plurality of small light sources. Is supplied to each of the plurality of AC power supply sources connected to the small light source while the AC power supply to the large light source is applied to the plurality of AC power supply sources connected to the large light source over time. A period of charge for each of the plurality of AC power supply sources is set for each of the plurality of AC power supply sources in order to alternately share the supply of AC power to the large light source. A command unit that gives an adjustment command to the AC power supply source for adjusting the length of the supply period of the AC power supplied to the large light source by the AC power supply source in charge of the supply of AC power AC power supply source And has light control device comprising a switching command unit for providing a switching command to rise to the switching signal to the switching means by transmitting a plurality of switch and small light sources connected state and a large source connected state.   The dimming device according to claim 1, wherein the command unit sets a charge period having a time length equal to each other for each of the plurality of AC power supply sources.   The command unit is configured to set a charge period having a time length equal to a period of AC power to be supplied to the large light source for each of the plurality of AC power supply sources. The light control apparatus of 2.   The command unit sets one charge period for one AC power supply source among a plurality of AC power supply sources, and sets another charge period that starts advancing in synchronization with the end of one charge period. 4. The light control device according to claim 1, wherein the light control device is set for another AC power supply source among the plurality of AC power supply sources. 5.   The plurality of AC power supply sources include first to third AC power supply sources, and the command unit sets the first charge period for the first AC power supply source, A third charge period in which the second charge period starting to proceed in synchronization with the end is set for the second AC power supply source and the progress starts in synchronization with the end of the second charge period. The light control device according to any one of claims 1 to 3, wherein is set for a third AC power supply source.

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