JPS63150887A - Dimmer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field The present invention relates to a light control device.

BACKGROUND TECHNOLOGY As shown in FIG. 12, a light control device used on a stage or in a studio has multiple lighting loads 1a, 1b=1c.
, 2 a+21), 2 ct..., and lighting load 1
The dimming signals sl, s2, S corresponding to the individual brightness of
3, . . . (indicated by reference numeral S when collectively referred to) is a dimming control device 3a which is a plurality of dimming signal generating means.

3b, 3c, ... (when used collectively, refer to reference mark 3)
1), a dimming signal S derived from the dimming controller 3;
The power energization amount of the light control unit 2 to the lighting load 1 is controlled according to the output level of the light control unit 2 to obtain a desired lighting effect.゛Usually, the light control device 3 is the light control console 4.
and the individual lighting loads 1a, 1b, lc,...
The brightness of the light is set in advance by the dimming operation device 3.

In such a prior art light control device, it is necessary to match the second input level of the light control unit and the output level of the light control device 3, and as shown in FIG. If the output level of the dimming signal of the controller 5a is variable in the range of O to IOV, the input level of the corresponding dimming unit 6a must also be in the range of O to IOV, as shown by the virtual line at b. If a mismatch occurs in the mutual input and output levels due to such correspondence, the dimmer controller 5
The light control unit 6 does not follow the lighting level set in
A problem arises in that the desired lighting effect cannot be obtained.

On the other hand, the level range of the signal output level of the dimming controller 5 is as follows:
OV-10V, 0V-12V, 0V-5■, or 0
The range of input levels of the dimming unit 6 is also the same. Therefore, there is an inconvenience in that a dimmer operating device capable of controlling a certain dimmer unit or a dimmer unit connected to a certain dimmer operating device are limited to the same signal system.

In addition, when it becomes necessary to combine a dimmer operating device and a dimmer unit with different signal systems, that is, mutually different input/output levels, as shown in FIG. 6b, it was necessary to interpose an interface 8 as a signal conversion means to convert the signal level and match the signal levels of both sides. However, conventionally, such an interface 8 The input level and output level are fixed and cannot be used if the dimmer unit or dimmer operator changes, and is compatible with the interaction between all dimmer operators and dimmer units included in the operator console. Creating an interface for this purpose requires a great deal of effort and time, and the production cost is high.

Furthermore, in dimming control of stage lighting, etc., the output S does not linearly follow the input P; rather, the output S follows the input P in a curved manner, for example, S = P' (k≠
0), a so-called square law characteristic is often required.

Therefore, it is difficult to convert the dimming signals from the dimming controllers 3 and 5, which have a linear linear variation characteristic, into a signal having a multiplicative characteristic, and further connect it to the dimming unit 2.6, which has a different signal system. Met.

OBJECTIVES Therefore, an object of the present invention is to solve the above-mentioned problems, and to enable dimmer operators with different signal systems and dimmer units to be arbitrarily connected, while still achieving a predetermined curve. It is an object of the present invention to provide a light control device equipped with a signal converting means for converting into an electrical signal having a level that changes in a manner similar to the above.

Embodiment FIG. 1 is a block diagram showing the electrical configuration of a light control device according to an embodiment of the present invention.

A dimmer, a plurality of lighting loads 16a, 16b,
16c, . Dimming operation devices 12a, 12b.

12c, . Interface 13a as a signal conversion means for converting and outputting an electrical signal having a level that changes in a curved manner over a range
, 13b, 13e, =..., 13n (indicated by reference numeral 13 when collectively referred to), and the lighting load 16 is powered so that the brightness corresponds to the second change range of the electrical signal input from the interface 13. dimmer unit 15 awl 5 b, 15 as a plurality of power energizing means
c, .

In FIG. 1, for example, the dimming operation 512a, interface 13a, 511 light unit) 15a with the same subscript a are one dimming system J? a is formed, thereby controlling the dimming of the lighting load 16a with the same suffix a. Next, one interface 13a is illustrated in FIG.
The operation will be explained with reference to FIG.

FIG. 2 is a block diagram showing the interface configuration of an embodiment of the present invention. The interface 13a includes an input level conversion circuit 21m, a characteristic modification circuit 22m, and an output level conversion circuit 23a. The input level conversion circuit 21a converts the level Vi of the dimming signal input from the dimming operation device 12a via the line No. 1 into the characteristic conversion circuit 22a.
The output level converting circuit 23a is a circuit for adapting the input level of the line ! The signal derived from line 3 is received, the level is converted to match the input level of the dimming unit 15, and the line! This is a circuit for deriving 4.

FIG. 3 is an electrical circuit diagram of the input level conversion circuit 21a. The input level conversion circuit 21a is provided with an rIS1 selector switch SWI which is input level setting means, and the first
The amplification degree of the operational amplifier A1 is changed by selectively connecting the resistors Ril to Rin using the changeover switch SWI, and between the input signal level Vil and the output signal level Vo1 of the input level conversion circuit 21a, Vol = −V it is set.
The linear proportionality constant k is determined so that the following relationship (=il) holds true.

In FIG. 3, the output voltage ■a1 of the operational amplifier A1 is as follows: Val = [R2/Ri(n)]・Vil =1
2) However, R1(n) represents the resistance value of the resistor selected by the first changeover switch SWI. Above output voltage Va1
When is positive, it is output via diode D1.

If it is negative, it is inverted through the second operational amplifier A2 with an amplification factor of 1 and output through the diode D2, and its output voltage Vol is equal to the absolute value Iva11 of the output voltage Val of the first operational amplifier A1, and Vo = 1Val l=
IV ill l・[R2/R1(n)]...(3) Since the resistance R2 is constant, by selecting a predetermined resistance Ri(n) with the first changeover switch SW1,
The input signal level Vil can be converted to the specified input level (0 to 10V in this embodiment) of the characteristic conversion circuit.

FIG. 4 is a block diagram of the characteristic conversion circuit 22a. In this embodiment, for example, the specified input level and specified output level of the characteristic conversion circuit 22a are both 0 to IOV, and a desired index is preset from the outside. By giving k,
Between the input signal level ■1 and the output signal level vO, Vo/10 = (V i/10 )'
=14) is set so that the following relationship holds true. In the fourth equation, the input signal level Vi is equal to the output level Vol of the input level conversion circuit 21a described above, and the output signal level V
o is input to an output level conversion circuit 23a, which will be described later.

FIG. 5 shows a graph illustrating various values of the index in the fourth equation.

FIG. 6 is a circuit diagram showing another embodiment of the characteristic conversion circuit 22a. It should be noted that the inverting input terminal of operational amplifier A5 has a bias voltage it! vl, v2, v3, diodes D3, D4, D5 and resistor R11
, R12, and R13 are connected. In Fig. 6, vl<v2<v3...(5)
By setting these voltage values appropriately, the input signal level Vi2 vs. output signal level Vo
Characteristic 1 of 2 shows a polygonal line characteristic as shown in the graph of FIG. 7, for example.

In the circuit shown in Fig. 6, three bias power supplies v1 to v3 are used to give the output signal a polygonal characteristic.
Of course, the number is not limited to three, and by increasing the number of bias power supplies, the characteristics of the output signal shown in FIG. 7 can be made into a smoother curve.

FIG. 8 is an electrical circuit diagram of the output level conversion circuit 23a. Figure 8 shows the input level conversion circuit 2 shown in Figure 3 above.
1 a I: They are similar and their actions are the same. That is, the resistors Rol and Ro2 are changed by the second changeover switch SW2.
, -, Ron are selectively connected and the amplification degree of the third operational amplifier A3 is changed so that the input signal level Vi2 (equal to the output signal Vo of the characteristic conversion circuit 22a shown in FIG. Vo2=-(R6/Ro(n)1・
Vi2 = 16). However, Ro(n) represents the resistance value of the resistor selected by the second changeover switch SW2.

When the above output Vo2 has a negative sign, it is output to the one pole side of the sign conversion switch SW3 and connected to a dimming unit (not shown). The code conversion switch SW3 is provided to match the sign of the input to the dimming unit 15a to which the output level conversion circuit 23a is connected. When the dimming unit) 15a requests a dimming signal with a positive sign, the sign conversion switch SW3 is switched to the p-pole side, and the output Va2 of the third operational amplifier A3 is transmitted through the fourth operational amplifier A4 with an amplification of 1. It may be connected to the signal that is inverted and output to the p-pole side of the code conversion switch SW3.

FIG. 9 shows an input level conversion circuit 3 according to another embodiment of the present invention.
1a is an electrical circuit diagram. The input level conversion circuit 31a shown in FIG. 9 is the input level conversion circuit 21a shown in FIG.
It has the same circuit configuration as , and corresponding parts are given the same reference numerals. What should be noted in this embodiment is the changeover switch SW used in the input level conversion circuit 21a't' shown in FIG.
1, a multiplexer 25 capable of switching a plurality of channels is used instead.

The selection connection of resistors Ril to Rin by the multiplexer 25 is Fin! This input level setting signal is derived from the input level conversion instruction section 27 in the control section 26. As a result, the input level conversion circuit 31a according to this embodiment can realize the setting of the input level using one multiplexer, and the device can be made smaller.

FIG. 10 is an electrical circuit diagram of an output level conversion circuit 33a according to another embodiment of the present invention. The output level conversion circuit 33a shown in FIG. 10 has the same circuit configuration as the output level conversion circuit 23m shown in tJS8, and it should be noted that corresponding parts are given the same reference numerals. @8 Selector switch SW2 used in the illustrated output level conversion circuit 23a. Instead of SW3, a multiplexer 28 capable of switching a plurality of channels is used to select the resistor Ro and set the amplification degree of the operational amplifier A3.
9 to perform code conversion of the signal.

The selection connection of the resistors Rol to Ron by the multiplexer 28 is the line! This output level setting signal is derived from the output level conversion instruction section 41 in the control section 26. Further, the code conversion of the signal by the multiplexer 29 is performed by a code conversion signal applied via the line 111, and this code conversion signal is derived from the code conversion instruction section 42 in the control section 26. As a result, the output level conversion circuit 33a according to this embodiment has the following characteristics:
The setting of the output level and the code conversion of the signal can be realized by the multiplexers 28 and 29, and the device can be made smaller.

Since the input level conversion circuit 31a shown in FIG. 9 and the output level conversion circuit 33a of this embodiment perform the necessary operations in accordance with external control signals, programming of the device can be easily implemented. can do.

FIG. 11 is a block diagram showing the electrical configuration of a dimming VC device according to another embodiment of the present invention. What should be noted in this embodiment is the predetermined timing, that is, the counter 6
The operation of each part constituting the light control device 61 is made to proceed according to the cut 6.

Multiple dimming controls 51m, 5lb, 51c+...
(Indicated by reference numeral 51 when used collectively) is a line! 1
1~! The input level conversion circuit 5 is selected by the first multiplexer 52a in the input channel selection section 52 via the
Selectively connected to 3. Further, the dimming units (58a, 58b, 58c+, etc., collectively referred to as reference numeral 58) corresponding to the dimming operation device 51 are selectively connected by the fifth multiplexer 56a in the output channel selection section 56. . The first multiplexer 52a and the fifth multiplexer 5
The selective increment of 6a is performed by counting the counter 66.

One dimmer operating device 51, ie, one channel, is connected to a dimmer unit 58 at the following timing. Furthermore, F55 multiplexer 56g and individual dimming unit 5
Sample and hold circuits 57a and 57b interposed between
, 57c, . . . (indicated by reference numeral 57 when collectively referred to) are for holding output data until the counter 66 scans all channels once.

At the same time, the input level conversion signal is sent to the second multiplexer 53a in the input level conversion circuit 53 from the input level conversion instruction unit 62 to the second multiplexer 53a via the line Tsukuda 12 for each count of 1, that is, for each channel. A characteristic conversion signal is supplied to the characteristic conversion circuit 54 from a characteristic conversion instruction section 63 via the line logic 13, and an output level conversion signal is supplied to the third multiplexer 55a in the output level conversion circuit 55 as an output level conversion instruction. The fourth multiplexer 55d receives a code conversion signal from the code conversion instruction unit 65 via line 15 as necessary.

The data of these conversion signals are transmitted in advance to each conversion instruction unit 62 to
The data is written in a memory (not shown) in the counter 65, and is sequentially read out every time the counter 66 counts. In this way, for each count, the channel selection, the level conversion signal necessary for the channel, the characteristic conversion signal, and the code conversion signal as necessary are given to each circuit, and the dimming signal for the corresponding channel is created and output to the corresponding dimming unit.

In this way, according to this embodiment, a light control device that performs a desired light control operation according to a predetermined program is realized.

Effects As described above, according to the present invention, there is provided a dimming signal generating means for deriving a dimming signal having a level that changes over a first variation range corresponding to the individual brightness of a lighting load; receiving the dimming signal between the power energizing means by means of an electric signal over a range of change, and adjusting the level of the dimming signal over a first range of change in a predetermined curved shape over a second range of change; A plurality of signal conversion means for converting and outputting electrical signals having varying levels are interposed. As a result, the dimming signal generating means and the power energizing means, which have different dimming signal systems, can be connected without any problem, and the operability is improved.

[Brief explanation of the drawing]

FIG. 1 is a plotter diagram showing the electrical configuration of a dimming device H according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of an interface 13a according to an embodiment of the present invention, and FIG. 3 is an input level diagram. FIG. 4 is a block diagram of the characteristic conversion circuit 22a, FIG. 5 is a graph showing its output characteristics, FIG. 6 is a circuit diagram showing an embodiment of the characteristic conversion circuit, and FIG. 7 is an electric circuit diagram of the conversion circuit 21a. 8 is an electric circuit diagram of the output level conversion circuit 23a, and FIG. 9 is an electric circuit diagram of the input level conversion circuit 31a according to the embodiment of the present invention.
FIG. 10 shows an output level conversion circuit 3 according to another embodiment of the present invention.
3a is an electric circuit diagram, FIG. 11 is a block diagram showing the electrical configuration of a dimming device according to an embodiment of the present invention, and FIG. 12 is a block diagram showing the electrical configuration of a dimming device according to the prior art. , FIG. 13 and FIG. 14 are diagrams showing the prior art. 1111...Dimmer device, 2.15.58...Dimmer unit), 3. S, 12.51...Dimmer operation device, 1
3...Interface, 21a, 31a, 53...
- Input level conversion circuit, 22a, 54... Characteristic conversion circuit, 23a, 33a - Output level conversion circuit, 25, 28
．． 29, 52a, 53a, 55a, 56a...Multiplexer, 2G...Control unit, 27.62...Input level conversion instruction unit, 41.64...Output level conversion instruction unit, 42.65... - Code conversion instruction section, 63...characteristic conversion instruction section, SW1 to SW3 changeover switch, A1-A4
...Operation amplifier agent Patent attorney Keiichi Saikyo@Figure 5 Figure 6 Figure 7 Input Vi2

Claims (1)

[Scope of Claims] A lighting load; a dimming signal generating means for deriving a dimming signal having a level that changes over a first variation range corresponding to the brightness of the lighting load; and from the dimming signal generating means. signal converting means for receiving the dimming signal and converting the level of the dimming signal over the first change range into an electrical signal having a level that changes in a predetermined curve shape over the second change range; and means for receiving an electrical signal that varies over a second variation range of the input electrical signal, and energizing the lighting load so that the brightness corresponds to the received electrical signal. Light control device.