JP3849166B2 - Light control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light control device for controlling the brightness of an illumination lamp in a stage or a studio, for example.
[0002]
[Prior art]
Conventionally, in stage lighting, it is necessary to change lighting continuously in time according to scenes and scenes that change with time. Further, in studio lighting such as a television, an image is reproduced through a video system such as a television camera. Therefore, it is necessary to consider brightness and color rendering taking the video system into consideration. In a television studio, the arrangement of lighting lamps (hereinafter referred to as lamps), posture settings, and dimming settings for each lamp are performed for each broadcast program, and the brightness of each lamp is dimmed and controlled as the program progresses. There is a need.
[0003]
Thus, in the stage or studio, a light control device for adjusting the brightness of a plurality of lamps is required. As a light control device used in a stage or a studio, there is a device in which dozens of light control devices are integrated in a rack as described in JP-A-57-187894. This is achieved by storing and fixing a plurality of dimmer unit devices each having an auxiliary power supply device in parallel in a storage box, and connecting each dimmer unit device to a plurality of lighting fixtures by two-wire connection. Thus, a large number of lighting fixtures can be dimmed intensively (prior art 1). This technology uses a plurality of dimmer unit devices in a storage case, and even when only one of the plurality of dimmer unit devices is used, it is moved together with the storage case. I was using it.
[0004]
Alternatively, as described in Japanese Patent Application Laid-Open No. 62-264597, there is a device in which a dimmer unit is independent for each of a plurality of lamp circuits and is used only as a single dimmer unit. This is provided with a remote control unit and a dimming control unit that controls a plurality of lamps in response to a dimming control signal from the remote control unit, so that an illumination chute work can be performed by one person on a temporary stage or the like. Further, the dimming control unit is housed in a portable case that can be carried (prior art 2).
[0005]
[Problems to be solved by the invention]
By the way, in the prior art 1, a plurality of dimmer unit devices are used in a storage case, and even when only one of the plurality of dimmer unit devices is used, each storage case It has to be moved and used, resulting in poor workability and more installation space than necessary.
[0006]
The prior art 2 is intended to be used as a single dimming control unit, and has a drawback that it takes time to set the dimming control unit in a concentrated manner.
[0007]
Therefore, in view of the above problems, the present invention can disperse a plurality of dimmer units when using only a few units, and can be used as a single unit. An object of the present invention is to provide a light control device which can be used by being incorporated in a rack and can be easily set.
[0010]
[Means for Solving the Problems]
Invention by the dimming device according to claim 1 is provided with operating means and the radiating fins to allow hand dimming operation on the front, below the radiating fin and a power input connector and the dimming output connector, as a single A dimming device having a substantially rectangular parallelepiped shape that can be used , and a plurality of units can be arranged adjacent to each other in the horizontal direction, and the plurality of units can be arranged so that the back side is in contact with two rows in the horizontal direction ; A mounting table that is capable of mounting an optical device and includes a power input function for inputting power from an AC power source and a power output connector for supplying power to each of the power input connectors of the plurality of dimmers; It is characterized by comprising.
[0011]
In each of the above explanations, the power input function in the mounting table may be a connector such as a power input plug provided in the mounting table, or provided in the mounting table for directly connecting a power line led from a distribution board or the like. It may be a terminal block. The power output function of the mounting table is performed using a power output connector provided corresponding to a plurality of dimmers.
[0018]
In the description of claims 8 and 9, the plurality of elements that generate heat include, for example, a plurality of power semiconductors such as a thyristor (SCR) and an insulator gate bipolar transistor (IGBT).
[0023]
In the invention of claim 1, wherein the a hand dimming operation means available dimmer as a single heat radiation fins, so disposed on one of the front faces of mutually dimmer, to concentrate multiple use In this case, the back sides can be arranged back to back, and two horizontal rows can be placed.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the invention will be described with reference to the drawings.
1 is a perspective view showing a light control device according to an embodiment of the present invention, FIG. 2 is a perspective view of a mounting table, and FIG. 3 is a perspective view of a light control device.
[0031]
In the light control device shown in FIG. 1, a mounting table 20 for centrally mounting a plurality of (six in the figure) dimmers 10 is provided.
[0032]
The dimmer 10 has a substantially rectangular parallelepiped shape (square prism shape), and as shown in FIG. 3, the dimming operation means 11 such as the dimming volume switch, the dimming signal input connector 12, and the operation state are lit and displayed on one surface thereof. A light emitting diode (LED) 13 is provided, and a power input connector 14 and a dimming output connector 15 are led out. Further, a heat radiating fin 16 is disposed on a surface opposite to the one surface of the dimmer 10. Furthermore, the dimmer 10 can be used as a single unit. For example, a mounting bracket 18 is attached to the upper portion of the dimmer 10 so that it can be hung from a ceiling or a grid in a studio, and a hanger 17 is attached to the mounting bracket 18. The structure can be fixed.
[0033]
The mounting table 20 is configured in a table shape as shown in FIG. 2, and a plurality of (four in the figure) pulleys 25 are attached to the lower side so as to be movable. Needless to say, the pulley 25 need not be provided. Three systems of power input connectors 21, 22 and 23 are led out on one surface of the mounting table 20.
[0034]
The power input connectors 21, 22, and 23 are provided to supply power inputs by three phases and four wires to a plurality (six in the figure) of the dimmer 10. The power input connectors 21, 22, and 23 are connected to power supply connectors of an AC power supply device (not shown).
[0035]
FIG. 4 shows a circuit system diagram of the light control device of FIG. The dimmer 10 is a dimmer that can be used as a single unit that receives power from the power input connector 14 and generates a dimming output voltage at the dimming output connector 15. The dimming output voltage from the dimming output connector 15 energizes at least one lighting fixture (including a lamp) (not shown) as a load. That is, the dimming output connector 15 energizes a plurality of lighting fixtures (including lamps) (not shown) as loads of a branching device (not shown).
[0036]
The mounting table 20 functions as a base for mounting a plurality of dimmers 10 when it is desired to use a plurality of units in a concentrated manner, and distributes the supplied AC power to the plurality of dimmers 10. It functions as a wiring branch box. That is, the mounting table 20 receives power inputs having different phases of R, S, and T by 120 degrees from power input connectors 21, 22, and 23 connected to a three-phase four-wire AC power source (not shown). It is supplied into the mounting table 20 via the table 26. The power input connector 21 has three wires R, N (neutral), and E (earth), and a voltage of 100 V, for example, the same as the commercial power supply voltage is applied between the R and N wires. Similarly, the power input connector 22 has three wires S, N (neutral) and E (earth), and a voltage of 100 V is similarly applied between the S and N wires. The power input connector 23 has three wires of T, N (neutral), and E (ground), and a voltage of 100 V is similarly applied between the T and N wires.
[0037]
The three wires RNE, SNE, and TNE of the respective connectors of the power input connectors 21, 22, and 23 are introduced into the mounting table 20 through the breaker 27, and the two wires RNE, RNE, SNE, and TNE. Connected to and branched from the two, the SNE line and the TNE line, and connected to the two power output connectors 24 for the RNE line, the two power output connectors 24 for the SNE line, and the two power output connectors 24 for the TNE line Is done.
[0038]
Although six dimmers 10 are illustrated so as to be connected to the six power output connectors 24, each dimmer 10 is electrically connected to the three wires of each connector of the six power output connectors 24. As described above, a three-wire power input connector 14 is provided, and a three-wire dimming output connector 15 for taking out as a dimming output is provided.
[0039]
Here, as the dimmer 10 shown in FIG. 1, FIG. 3, or FIG. 4, a phase control type dimmer designed for low noise is used. As a dimmer with a low noise design, for example, there is a dimming device of a tilt rising phase control system. In addition, as a dimmer, there is a dimmer itself equipped with a console / hand operation switching function equipped with an operating means, and if this is used, remote dimming operation can be performed from an illumination console (not shown). Then, the local dimming operation from the dimmer itself becomes possible.
[0040]
FIG. 5 shows an example of the low noise phase control dimmer. One end of the AC power source AC is connected to one end of a lamp LP made of, for example, an incandescent lamp via the low noise dimmer 10, and the other end of the lamp LP is connected to the other end of the AC power source AC. The alternating current (that is, the lamp current) flowing from the alternating current power supply AC to the lamp LP is phase-controlled by the low noise dimmer 10 every half cycle of the power supply, so that dimming control is performed.
[0041]
The low noise dimmer 10 uses, for example, a ramp-up phase control system, and is an SCR formed by connecting two thyristors (hereinafter referred to as SCR) 1 and 2 in parallel so that their polarities are opposite to each other. The phase control circuit a, four diodes D1 to D4 assembled in a bridge shape between one parallel connection point of the two SCR circuits connected in parallel and the other parallel connection point, and current rising characteristics at the time of phase control And a rising slope control circuit b composed of an insulated gate bipolar transistor (hereinafter referred to as IGBT) to be controlled.
[0042]
Next, the circuit operation of FIG. 5 will be described.
The gates P1 and P2 of the SCR1 and SCR2 of the low noise dimmer 10 are supplied with a gate pulse of a power supply half cycle period as shown in FIG. 6 (b) from a timing signal generating circuit (not shown). The waveform is a current waveform with a steep rise as shown in FIG. 6 (a) or FIG. 7. The AC power supply AC is provided with the aforementioned rise slope control circuit b in parallel with the SCR phase control circuit a. For this reason, a base signal (see FIG. 6 (c)) having a rising slope at a timing immediately before the rising edge immediately before the SCR gate signal in FIG. 6 (b) (see FIG. 6 (c)) is sent from the timing signal generating circuit (not shown). Therefore, the IGBT collector-emitter conduction resistance changes with the slope of the base signal waveform during this base signal period, and thereby the lamp current. Waveform rising transition at turn as shown in FIG. 6 (a) or FIG. 7 is a waveform having a gentle slope, thereby to suppress the vibration of the lamp filament can be greatly reduced filament noise. Note that the degree of the rising slope of the lamp current waveform can be changed by changing the width and slope of the base signal shown in FIG.
[0043]
FIG. 7 shows an enlarged lamp current. This lamp current waveform is composed of an IGBT control area having an inclined waveform controlled by the IGBT and a thyristor control area controlled by the SCRs 1 and 2 following this area. Yes.
[0044]
1, the number of dimmers that can be mounted on the mounting table 20 is six. When configuring such a mounting table, the number of dimmers mounted on the mounting table is 2 when the power supply line input from the AC power source to the dimmer is a single-phase three-wire (two systems). It is appropriate to set a multiple, or a multiple of 3 is appropriate when the power supply line input from the AC power supply to the dimmer is a three-phase four-wire (three systems). Next, this will be described.
[0045]
FIG. 8A shows a single-phase three-wire (two systems) and a power feeding system to the dimmer using these. However, the ground wire is omitted. There are U, V, and N (neutral) lines, and U and V are supplied with power inputs that are 180 degrees out of phase with each other. For example, the same voltage 100 V as the commercial AC power supply voltage is applied between the U and N lines. Similarly, a voltage of 100 V is applied between the V and N lines. When the power input is a single-phase three-wire, as shown in FIG. 8 (a), by connecting one dimmer 10 between the U and N lines and between the V and N lines, The supply side is balanced, and power can be supplied efficiently. Therefore, in the case of single-phase three-wire, the number of dimmers to be connected is appropriately a multiple of 2, and accordingly, the number of dimmers mounted on the mounting table is appropriately a multiple of 2.
[0046]
FIG. 8 (b) shows a three-phase four-wire (three systems) and a power feeding system to the dimmer using them. However, the ground wire is omitted. There are R, S, T, and N (neutral) lines, and R, S, and T are supplied with power inputs having phases different from each other by 120 degrees. For example, the same voltage 100 V as the commercial AC power supply voltage is applied between the R and N lines. Similarly, a voltage of 100 V is applied between the S and N lines. A voltage of 100 V is applied between the T and N lines. When the power input is three-phase four-wire, as shown in FIG. 8 (b), one dimmer is provided for each of the R and N lines, between the S and N lines, and between the T and N lines. By connecting 10, the power supply side can be balanced and power can be supplied efficiently. Therefore, in the case of single-phase three-wire, the number of dimmers to be connected is appropriately a multiple of 3, and therefore the number of dimmers mounted on the mounting table is appropriately a multiple of 3.
[0047]
FIG. 9 shows a perspective view of a light control device according to another embodiment of the present invention.
In FIG. 9, ten dimmers 10 can be mounted on the mounting table 20. Ten dimmers 10 are arranged in two rows of five each, and the dimmers arranged in two rows are arranged back to back so that the back sides are in contact with each other. The mounting table 20 is provided with a power output connector 24, a terminal block 26, and a breaker 27. The terminal block 26 corresponds to a two-phase three-wire power input. The wiring system inside the mounting table 20 corresponds to two-phase three-wires, and ten power output connectors 24 are connected to the UNE line and the VNE line five by five.
[0048]
The dimmer 10 to be mounted is configured in a substantially rectangular parallelepiped shape (square column shape) as shown in FIG. 10, and a dimming operation means 11 such as a dimming volume switch, a dimming signal input connector 12, and an operation state are displayed on one surface. LED13 for this is arrange | positioned, and it has the structure by which the radiation fin 16 was arrange | positioned on the same surface. Further, a power input connector 14 and a dimmer output connector 15 are led out below the same surface. As in FIG. 3, the dimmer 10 can be used as a single unit. For example, a mounting bracket 18 is attached to the upper portion of the dimmer 10 so as to be hung from a ceiling or a grid in the studio. The hanger 17 can be fixed.
[0049]
FIG. 11 shows a configuration example when the dimmer according to the present invention is used alone. This is an example in which the dimmer 10 is dispersed from a usage form in which a plurality of dimmers are concentrated on the mounting table 20 as shown in FIG. 1 or 9, and used for, for example, one-point hanging used in a studio. It is. A traveling rail 32 is attached below the grid 31 provided on the ceiling side in the studio, and a plurality of one-point suspension devices 33 that can move in the horizontal direction are attached to the rail 32. The dimmer 10 is mounted on the movable one-point suspension device 33. The one-point suspension device 33 has a cylindrical support body 34 that can be expanded and contracted, and a lighting fixture connector 35 is attached to the tip thereof, and the lighting fixture 36 is attached to the connector 35. For the dimmer 10, a power supply cable 38 is connected from an AC power supply panel (not shown) to the branch connector 37 through the grid 31, and power is supplied from the branch connector 37 to the dimmer 10 through the power supply line. Yes. A connector provided at one end of the feeder line of the dimmer 10 can be detachably and electrically connected to the branching connector 37. A load line 39 is wired from the dimmer 10 to the luminaire connector 35 along the support 34 that can be expanded and contracted.
[0050]
FIG. 11 shows a state in which a plurality of dimmers 10 are mounted on the mounting table 20 and are installed on the floor surface in the studio, as shown in FIG. 1 or FIG. . When installed on the floor in this way, it is possible to obtain the dimmer power from power supply means (power outlet) disposed at a relatively low position such as a wall surface. Alternatively, a configuration in which a plurality of dimmers 10 are mounted on the mounting table 20 may be installed on the grid 31 in the studio.
[0051]
FIG. 12 (a) shows that the casing 17 that covers the dimmer is configured in a triangular prism shape, and the radiation fins 16 are provided over two of the triangular prism surfaces. Power semiconductors 18 and 19 that are heat generation sources are arranged in a distributed manner on the back surface of the radiation fins 16. Thus, heat dissipation efficiency can be increased by dispersing the power semiconductor as a heat source. The power semiconductors 18 and 19 respectively refer to the SCRs 1 and 2 and IGBTs in terms of the dimmer circuit shown in FIG. In FIG. 12 (a), the case has been described in which the casing 17 that encloses the dimmer has a triangular prism shape. However, in the present invention, the casing that encloses the dimmer generally has a polygonal prism shape. It is sufficient that the heat dissipating fins are provided corresponding to two or more surfaces of the plurality of surfaces, and the elements serving as the heat sources are respectively disposed corresponding to the heat dissipating surfaces.
[0052]
If it does in this way, since the thermal radiation efficiency will become good, the dimension of the thermal radiation fin 16 can be made small, and the weight of a dimmer can be made light.
[0053]
Further, when the dimmers 10 configured as shown in FIG. 12 (a) are arranged in a horizontal row as shown in FIG. 13, a dimmer with less heat interference between the adjacent dimmers 10 is realized. can do.
[0054]
For comparison with the present invention of FIG. 12 (a), FIG. 12 (b) shows the configuration of a conventional dimmer. Conventionally, one radiating fin 16 is attached to one surface of a rectangular parallelepiped (quadrangular columnar) housing 17, and a plurality of power semiconductors 18, 19 are arranged on the back surface of the one radiating fin 16. ing. As described above, since two or more power semiconductors that generate heat are arranged on the same surface, for example, the heat of the semiconductor 19 arranged below has a thermal influence on the upper semiconductor 18. Thus, the two semiconductors are easily affected by heat interference. Thus, conventionally, since the heat dissipation efficiency is poor, the size of the heat dissipation fins is increased, and the weight of the dimmer is also increased.
[0057]
【The invention's effect】
According to the first aspect of the present invention, since the local dimming operation means of the dimmer that can be used as a single unit and the heat radiation fin are arranged on one same surface of the dimmer, a plurality of units are concentrated. When used, the back side can be placed back to back, and two horizontal rows can be placed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a light control device according to an embodiment of the present invention.
2 is a perspective view showing a mounting table in FIG. 1. FIG.
FIG. 3 is an exploded perspective view showing the light hanger in FIG. 1 and a hanging hanger when used alone.
4 is a wiring system diagram of the mounting table in FIG. 1. FIG.
FIG. 5 is a circuit diagram of a low noise dimmer used in the dimming device of FIG. 1;
6 is a waveform diagram for explaining the operation of the dimmer in FIG. 5;
7 is an enlarged view of a lamp current waveform for explaining the operation of the dimmer of FIG.
FIG. 8 is a wiring diagram showing a power supply system to a dimmer using single-phase three-wire (two systems) or three-phase four-wire (three systems).
FIG. 9 is a perspective view showing a light control device according to another embodiment of the present invention.
10 is an exploded perspective view showing the light control device in FIG. 9 and a hanging hanger when used alone.
FIG. 11 is a diagram showing a configuration example when the dimmer according to the present invention is used alone.
FIG. 12 is an exploded perspective view showing another embodiment of a heat dissipating fin and a conventional example in the dimmer according to the present invention.
13 is a plan view showing a light control device configured by arranging the light control devices in FIG. 12 in a horizontal row. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Light control device 11 ... Hand light control operation means 14 ... Power input connector 15 ... Light control output connector 16 ... Radiation fin 17 ... Hanger 20 ... Mounting base 21, 22, 23 ... Power input connector 24 ... Power output connector 33 ... Single point lifting device

Claims (1)

Equipped with operating means and heat radiation fins that allow hand dimming operation on the front, and a power input connector and dimming output connector below the heat radiation fins, and can be used as a single unit, and multiple units are adjacent in the horizontal direction A dimming device having a substantially rectangular parallelepiped shape that can be arranged in such a manner that a plurality of units can be arranged so that the back side is in contact with two rows in the horizontal direction ;
A mounting table capable of mounting the dimmer and having a power input function for receiving power from an AC power source and a power output connector for supplying power to each of the power input connectors of the plurality of dimmers When;
A light control device comprising:

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