JPH01186593A - Dimming device - Google Patents

Abstract

PURPOSE:To effectively make illumination display by making interpolation operation of the approximation level of a cross-fader output from clock means output data timely adjoining and level detection means output data corresponding to the former data. CONSTITUTION:The output of a cross-fader 5a is given to a fading memory 10a which is a memory means via a level detection part 7a, and the timer time outputted with a timer 8 is recorded in a memory 10a. The output of the memory 10a is given to a cross-fading level operation part 12a which is an interpolation operation means, and the output of the part 12a is sent to a terminal T1a of a switch 13a. A common terminal T3a of the switch 13a is connected to a multiplication machine 15a, and the output of a regeneration scene buffer 16a reading out from the memory 3a and keeping a memory is also given to the machine 15a. Consequently the multiplication of a cross-fading level and a dimming level is conducted in the machine 15a. The addition of the outputs of machines 15a and 15b is conducted in an adder 17, and outputted to a dimmer 19 via a sample holding circuit 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a light control device for performing lighting effects on stages, studios, and the like.

BACKGROUND ART In general, a large number of lighting loads are used on stages, studios, etc., and they are divided into groups of predetermined lighting loads (
The dimming level of each channel (hereinafter referred to as channel) is centrally controlled in a control room or the like. A dimmer device used in places where such dimming control is performed uses a storage device that contains in advance dimming data regarding the dimming level of each channel for each scene to be produced (hereinafter referred to as a scene). The dimming data is read out for each scene to set the lighting load of each channel to a desired dimming state.

The scene closing transition is performed by a so-called cross-fade operation in which the current scene fades out and the next scene fades in in parallel.

This cross-fade allows you to create two scenes between the current scene and the next scene.
Manual crossfading, which can gently connect two still scenes, uses a crossfader that is responsible for fading out the current scene and a crossfader that is responsible for fading in the next scene. Said 2
The two crossfaders are arranged in parallel so that their scales are in opposite directions. Therefore, a cross fade can be realized by simultaneously moving two cross faders in the same direction.

The crossfader has a scale that indicates the reproduction rate of the dimming level of the scene that each crossfader is responsible for (hereinafter referred to as crossfade level), for example from 0% to 100.
It is written as %.

That is, by operating the crossfader in the direction from 0% to 100%, it is possible to perform a fade-in operation for the scene that the crossfader is responsible for, and conversely, by operating the crossfader in the direction from 100% to 0%. It is possible to achieve a scene fade-out operation.

Recently, for example, when rehearsing a performance, a manual crossfade is performed, and the time required to operate the crossfader (hereinafter referred to as fade time) is stored in a storage device, and during the actual performance, it is stored in the storage device. The fade time is read out and cross-fade is automatically realized. The fade time is the time required for the crossfade level to change between 0% and 100%.

FIG. 8 shows how the cross-fade level changes during playback when automatic cross-fade is performed. For example, a storage device may have a fade time TFI.
, TF2 are stored, and when a crossfade is started at time to, the fade time TF is stored from time to.
The cross-fade level reaches 100% at time t1 after 1 has elapsed. That is, if a cross-fade is instructed to fade out the current scene at 0 time t2 when the transition between scenes ends in the period from time tO to t1, the cross-fade is instructed to fade out at time t3 after the fade time TF2 has elapsed from time t2. The fade level will be 0%. At this time, the next scene is being faded in at the same time, and the cross-fade level of the next scene is 0% at time t2 and 10% at time t3.
It is 0%.

The storage device has fade times TF1 and TF as described above.
2 is stored, the times 10, 11, t2 . t3
The crossfade level at times other than the above must be calculated by calculation. Normally, such calculations are performed so that the cross-fade level changes linearly with respect to the fade time, as shown in FIG.

However, the operation of the crossfader during rehearsal is not necessarily limited to operations that change in proportion to time, but may involve operating the crossfader quickly or slowly during the crossfading. In order to achieve such a loss fade, it is necessary to manually operate the cross fader and correct the cross fade level even during the actual performance. Fade levels cannot be accurately reproduced.

In order to solve such problems, other prior art
During rehearsal, that is, when manually operating the crossfader, the crossfader output is periodically sampled,
The crossfader output corresponding to each time is stored in the storage device. FIG. 9 shows changes in the cross-fade level at the time of reproduction, that is, at t% when the contents stored in the storage device are read out and the cross-fade is automatically performed. That is, the sampling period Δ is set at each time tto, ti1 . tt2. . . . Crossfade levels LO, Ll, L2. ... is determined, and as a result of determining the cross-fade level at multiple times during one cross-fade operation, it is possible to reproduce a non-linear change in the cross-fade level with respect to time.

However, in order to feel smooth changes in the dimming level of the lighting load, the sampling period Δt mentioned above must be 50m5.
ec or less, and a large capacity memory is required to realize, for example, a crossfade lasting several minutes, which is impractical.

Problems to be Solved by the Invention The purpose of the present invention is to solve the above-mentioned technical problems and to make it possible to realize non-linear or loss fade characteristics without unnecessarily increasing stored data. An object of the present invention is to provide a light control device.

Problems and Means for Solving the Problems The present invention provides a crossfader for manually performing a fade operation of a lighting load, a timekeeping means for performing a timekeeping operation and generating a timing pulse, and a crossfader output. level detection means for outputting a crossfader output in synchronization with the timing pulse when the signal changes passing through any one of a plurality of predetermined reference levels; and a timekeeping means for storing the output of the level detection means. The approximate level of the crossfader output is calculated by interpolation from the storage means in which the output is also stored, and the temporally adjacent clock means output data and the corresponding level detection means output data in the memory contents of the storage means. This is a light control device characterized in that it includes an interpolation calculation means.

Operation In the present invention, when a crossfader is used to manually perform a fade operation of the lighting load, the storage means stores both the level detection means output and the time measurement means output. The level detection means outputs the crossfader output in synchronization with a timing pulse generated by the timer when the crossfader output passes through any one of a plurality of predetermined reference levels. The clock means output is stored together with the level detection means output when it is stored in the storage means.

When automatically performing a fade operation of the lighting load based on the memory contents of the storage means, the approximate level of the crossfader output is calculated from the temporally adjacent output data of the clock means and the corresponding output data of the level detection means. is calculated in the interpolation calculation means.

This prevents the data stored in the storage means from increasing unnecessarily, and it is possible to realize a non-linear loss fade operation with respect to time.

Embodiment FIG. 1 is a block diagram showing the basic configuration of a light control device 1 which is an embodiment of the present invention. In the light control device 1, the light control level of each of the plurality of lighting loads 2 is controlled for each predetermined group (hereinafter referred to as a channel). Light control data corresponding to the light control level of each channel in each scene is input in advance to the scene memories 3a and 3b, corresponding to each scene of the performance to be performed. The scenes to be produced are 0.1, 2, etc. in chronological order. Scene numbers are assigned as follows, for example scene memory 3.
The dimming data for scenes with odd scene numbers is stored in a, and the dimming data of scenes with even scene numbers is stored in the scene memory 3b. In the following, a set of dimming data corresponding to all channels of each scene will be referred to as scene data.

The light control device 1 is also provided with cross frames 5a and 5b. The crossfader 5a is a crossfader for setting the reproduction rate (hereinafter referred to as crossfade level) of the scene data stored in the scene memory 3a, and the talosfender 5b is a crossfader for setting the reproduction rate of the scene data stored in the scene memory 3b. This is a crossfader for setting the crossfade level.

The loss faders 5a and 5b have scales indicating cross fade levels (0% to 100%), and the cross faders 5a and 5b are arranged so that the scales are in opposite directions. Therefore, the crossfader 5a
, 5b in the same direction at the same time, the scene corresponding to the scene data stored in the scene memory 3b fades in/out as the scene corresponding to the scene data stored in the scene memory 3b fades in/out. A fade out/fade in is performed.

The output of the Talosph kneader 5a is given to the level detector 7a via a line 6a. The level detection section 7a is also supplied with a timing signal via a line 9a from a timer 8, which is a timekeeping means that performs a timekeeping operation and generates a timing signal. The output of the level detection section 7a is
The data is given to a fade memory 10a which is a storage means. The fade memory 10a is also provided with data relating to the clocked time from the timer 8 via line 11a.

In the level detection section 7a, the output level of the crossfader 5a (hereinafter referred to as crossfade level A) is set at a plurality of predetermined reference levels (for example, 0%, 10%, 20%, . . . of the crossfade level). 100%), the crossfade level A is stored in the fade memory 10a in synchronization with the timing signal.
, and at the same time, the measured time output by the timer 8 to the line lla is stored in the fade memory 10a.

The output of the fade memory 10a is sent to a cross-fade level calculation section (hereinafter referred to as the calculation section) 1 which is an interpolation calculation means.
2a, and its output is given to the terminal T 1 a of the changeover switch 13a.

The terminal T 2 a of the changeover switch 13a is connected to the line 14
It is connected to line 6a via line 6a, and is therefore given the output of crossfader 5a.

The common terminal T3a of the changeover switch 13a is connected to the multiplier 15.
The zero multiplier 15a connected to the 0 multiplier 15a is also supplied with the output of a reproduction scene buffer 16a that sequentially reads and holds scene data of a scene currently being reproduced from the scene memory 3a. Changeover switch 13a
A cross-fade level is derived from the common terminal T3a, and therefore multiplier 1.5a multiplies the cross-fade level and the dimming level. The output of such a multiplier 15a is sent to the adder 1
7 is applied to one input terminal 172t.

The reproduction scene buffer 16a holds scene data, and selectively converts the dimming data of each channel into a dimming level represented by an analog voltage level according to an address signal to be described later, and outputs the converted dimming level.

The crossfader 5b has the same configuration as the crossfader 5a described above, and in FIG. 1, corresponding parts are shown with subscripts added to the reference numbers. . Further, in the following, the output level of the crossfader 5b will be referred to as a crossfade level B.

The changeover switches 13a, 13b are in the state shown by solid lines in FIG. 1 during rehearsal, and are in the state shown by broken lines during the actual performance. by this,
The multipliers 15a, 15b are supplied with the outputs of the crossfaders 5a, 5b during rehearsal, and are supplied with the outputs of the calculation units 12a, 12b during the actual performance.

The adder 17 performs an addition operation on the outputs of the multipliers 15a and 15b. The output of the adder 17 is applied via a sample and hold circuit 18 to one of a plurality of dimmers provided in association with each channel. Each dimmer has one
A plurality of lighting loads 2 for each channel are connected.

Scene data for one scene is read out from the scene memories 3a and 3b into the reproduction scene buffers 16a and 16b, respectively. Such playback scene buffers 16a, 16b
are given address signals from the control section 20, respectively. In response to this address signal, the reproduction scene buffers 16a and 16b sequentially output the dimming level for each channel. The address signal output by the control section 20 is also provided to the sample and hold circuit 18. The sample and hold circuit 18 is configured to include, for example, a plurality of analog switches corresponding to each channel, and the plurality of analog switches are sequentially and selectively turned on by an address signal, so to speak, in a time-series manner. The dimming level of each channel is sampled and held. The dimming level for each channel held in this way is given as a control signal to the dimmer 19 corresponding to each channel.

The dimmer 19 is configured to include, for example, a thyristor or a triac, and the firing angles of the thyristor or triac are controlled by a control signal given from the sample and hold circuit 18, so that the illumination load 2
Therefore, duty control regarding the hand power is performed, and as a result, the plurality of lighting loads 2 are brought into a dimming state corresponding to the scene data.

FIG. 2 is a block diagram showing the basic configuration of the calculation section 12a. The fade memory 10a stores a reference level of 1 predetermined in the level detection section 7a as described above.
Since the cross-fade level A when the timing signal is applied after passing through one and changing, and the time measured by the timer 8 at the time when the cross-fade level A is stored in the fade memory 10a are stored. In other words, temporally discontinuous data is stored. Arithmetic unit 12a
In , an interpolation operation is performed on the discontinuous data. The calculation unit 12a is provided with a parameter setting unit 31 for setting a parameter Δ, which will be described later, for performing such interpolation calculations. The parameter Δ is a parameter related to the time to maintain the same cross-fade level, as will be described later.

The output of the parameter setting section 31 is given to a comparator 32. The comparator 32 is also supplied with the output of a counter 33, and the counter 33 is supplied with a clock generator 34.
A clock signal is supplied from The comparator 32 outputs a detection pulse when the output of the parameter setting section 31 (ie, parameter Δ) and the output of the counter 33 match, and the detection pulse is given to the up/down counter 35. The output of comparator 32 is also given to counter 33 as a reset signal. As a result, the counter 33 repeats the counting operation fY until its count value reaches the parameter Δ.

In the up/down counter 35, the count value is increased or decreased by 1 each time a detection pulse is applied. Whether the operation in the up/down counter 35 is an addition operation or a subtraction operation is determined by an operation control signal given from an operation setting section 36, which will be described later.

The output of the up/down counter 35 is given to a digital/analog (hereinafter referred to as D/A) converter 37 and converted into an analog signal. It is sufficient for the D/A converter 37 to be able to handle a 7-bit input when the cross-fade level given from the fade memory 10a changes in 100 steps from 0% to 100%. In other words, the input from the up/down counter 35 is (0000000)2
, the output has a crossfade level of 0%
The voltage level corresponds to (1100100)2
(=100), an analog voltage level corresponding to a cross-fade level of 100% is output.

However, the subscript "2" indicates that the numbers in parentheses are binary numbers.

The configuration of the calculation unit 12b is also similar to the configuration shown in the second diagram.

Figure 3 shows the crossfaders 5a and 5 during rehearsal.
b is the generation period of the timing signal (for example, 1 sec>
The operation is sufficiently slow compared to the line 6 at this time.
3 is a graph showing changes in the cross-fade level A derived from FIG. FIG. 3 shows the change in the cross-fade level A with respect to the time measured by the timer 8. Referring to FIG. 3, fade memory 10 during rehearsal
The cross-fade level A for a and the data write operation related thereto will be explained.

The level detection unit 7a uses 0%, 10%, 20%, . . . of the cross-fade level as the reference level.

A level corresponding to 100% is set. The level detection section 7a compares the output level of the crossfader 5a (crossfade level A) with a reference level.
When the cross-fade level A passes one of the reference levels, the cross-fade level A at that point in time, that is, at the time when the timing signal is applied, is applied to the fade memory 10a at the timing of the timing signal applied thereafter. At this time, the measured time derived from the timer 8 to the line 11a is simultaneously written into the fade memory 10a. When operating the crossfaders 5a and 5b to change the crossfade level A output by the crossfader 5a as shown in the third diagram, the fade memory 10
For example, the data shown in Table 1 is written to a.

When the level detection section 7a detects an increase in the cross-fade level A when the scale of the cross-fader 5a moves from O% to 100%, the level detection section 7a detects the fade memory 10.
Give 0% as crossfade level A to a. The time T0 measured by the timer 8 at this time is stored in the fade memory 10a together with the cross-fade level A (0%).

When the cross-fade level A changes by passing through 10%, the level detecting section 7a supplies the cross-fade level A at that point to the fade memory 10a when a timing signal is applied after the passage is detected. However, since the change in the cross-fade level A is sufficiently slow compared to the generation cycle of the timing signal, the cross-fade level A given to the fade memory 10a at this time becomes a value in the vicinity of 10%. When this cross-fade level A (10%) is applied to the fade memory 10a, the time T counted by the timer 8 is simultaneously written to the fade memory 10a.

Similarly, crossfade level A (20%).

..., 100%) and crossfade level A.
The time measured by the timer 8 at the time T2. reaches each level. ...,T. is stored in the fade memory 10a.

When the clock time of the timer 8 reaches T, when the operation of the scale of the Talosph kneader 5a from 100% to 0% starts, the fade memory 10a stores the clock time TI together with the cross-fade level A (100%). be done. After this, if you move the crossfader 5a toward the scale O%, the crossfade level A (9
0%, 80%.

. . , 0%), the time measured by the timer 8 is T, , , T,) along with each cross-fade level A.

..., T2. are sequentially written into the fade memory 10a. At this time, the data shown in Table 2 is written into the fade memory 10b. Thereafter, as the crossfaders 5a and 5b are operated, data for each crossfade between each scene is stored in the fade memories 10a and 10b.
written to. However, the measured times T o, T + , . . . in Tables 1 and 2 are the same measured times.

(Margins below) Table 1 Table 2 Figure 4 shows that the crossfader 5a is set to line 9, and timer 8 is set to line 9.
3 is a graph showing a change in the cross-fade level A when the operation is sufficiently fast compared to the cycle of the timing signal derived in FIG.

In the level detection unit 7a, after the passing of the reference level of the cross-fade level A is detected, when a timing signal is applied, the cross-fade level A at that time is detected.
In order to provide the fade memory 10a with When the first timing signal is given after the cross-fade level A passes through one of the reference levels and changes, the fade memory 10a stores the cross-fade level A (0%, 50%,
100%, 100%, 70%.

35%, 0%) are stored. At this time, the measured times T0 to T6 are simultaneously stored. In this way, the data shown in Table 3 is written into the fade memory 10a, and the data shown in Table 4 is written into the fade memory 10b. However, the measured time To in Figure 4
~T@ is the measured time T o, T + ,... in Figure 3.
It is independent. Therefore, the measured time T0°TI,... shown in Tables 3 and 4 does not have a dependent relationship with T,, T1,... shown in Tables 1 and 2. . Also, the measured time T in Tables 3 and 4. , T
5. ... are the same measured time.

Table 3 Table 4 Figure 5 shows the steps for operating the crossfaders 5a and 5b.
It is a graph showing a change in the cross-fade level A when the operation direction is changed during one cross-fade operation. However, the change in crossfade level A is
It is assumed that the cycle is sufficiently slow compared to the generation cycle of the timing signal.

When the cross-fade level A passes one of the reference levels, the level detection unit 7a supplies the cross-fade level A at that time to the fade memory 10a, so that the cross-fade level A decreases to one of the reference levels. , the cross-fade level A is also written to the fade memory 10a. In response to the change in the loss fade level A as shown in Figure 5, the data shown in Table 5 is written in the fade memory 10a, and the data shown in Table 6 is written in the fade memory 10b. written. However, the measured time T o shown in Figure 5,
T + , . . . are independent of any of the measured times T o, T I, . . . shown in FIGS. 3 and 4. In addition, the measured time T shown in Tables 5 and 6,
, TI, . . . are the same.

(Margins below) Table 5 Table 6 Figure 6 is a diagram for explaining the operation of the calculation unit 12a, and shows the output level of the calculation unit 12a. The cross-fade level A stored in the fade memory 10a is a so-called discontinuous value having a constant level almost determined by the reference level set in the level detection section 7a. When the output of such a fade memory 10a is used as it is as a cross-fade level, the cross-fade level changes in a so-called auxiliary manner, as shown by a curve Q1 shown by an imaginary line in FIG. Put away.Arithmetic unit 12a
In this step, linear interpolation is performed between each piece of discontinuous data as described above in the fade memory 10a.

The parameter Δ calculated in the parameter setting unit 31 in FIG.
By the cross-fade level V=, Vl-+ stored in the fade memory 1()a corresponding to, it is expressed as follows. Therefore, since the comparator 32 provides a detection pulse to the up/down counter 35 at every time interval corresponding to the parameter Δ, the output of the D/A converter 37 corresponds to the time T counted by the timer 8. T9. is increased by 1% from the time T9.
At time 1, the crossfade level becomes 11.

In this way, the cross-fade level output by the calculation unit 12a changes smoothly as shown at 12 in the sixth figure.

The calculation section setting section 36 is configured as follows: 1. ．． In the case of (2), output a calculation control signal that makes the calculation in the up-down counter 35 an addition calculation, and ■1□<V 1 ...(3)
If so, an arithmetic control signal is output that makes the arithmetic operation a subtraction arithmetic operation. This allows the third
With respect to changes in the loss fade level as shown in FIGS. 4, 5, and 5, it is possible to reproduce the loss fade level with great fidelity during the actual production.

As described above, in this embodiment, the level detection section 7a,
7b, a predetermined reference level is compared with the crossfade levels A and B output by the crossfaders 5a and 5b, and the timing signal after the crossfade levels A and H are detected to have passed the reference level is compared. Crossfade levels A, B, and timer 8 with timing
The measured time is stored in the fade memory 10a and lob. The so-called discontinuous loss fade levels A and B stored in this manner are stored in a calculation unit 12a.

Interpolation processing is performed in step 12b. In this way, a non-linear change in cross-fade level can be reproduced even with a relatively small amount of data. Further, the fade memories 10a and 10b have a crossfade level A,
Since B and time measurement are stored in association with each other, crossfade level A
, B do not monotonically increase or decrease, such a loss fade operation can be reproduced.

Furthermore, even if the cross-fade takes a long time, the data stored in the fade memories 10a and 10b will not increase unnecessarily, so the storage capacity of the fade memories 10a and 10b can be selected to be relatively small. It becomes like this.

FIG. 7 is a block diagram showing the basic configuration of a light control device 51 which is another embodiment of the present invention. This example is based on the first example described above.
Similar and corresponding parts to the embodiments will therefore be described with the same reference numerals.

In this embodiment, the preset fader section 41 can be used to input the dimming level corresponding to each scene into the scene memories 3a and 3b during rehearsal.

The output of the preset fader section 41 is on lines 46a and 4.
6b to terminals T4a and T4b of the changeover switches 42a and 42b. Furthermore, the outputs of the playback scene buffers 16a, 161:+ are given to terminals T5a, T5b of the changeover switches 42a, 42b, respectively. Further, the cross-fade level derived from the common terminal T6=t, T6b of the changeover switches 42a and 42b is applied to the multipliers 15a and 15b.

The outputs of the multipliers 15a, 15b are given to the input terminals 17a, 17b of the adder 17, and the detection units 43a,
43b is also given. The detection units 43a and 43b are
For example, it is configured to include an analog/digital converter, etc., and converts the outputs of multipliers 15a and 15b into digital signals and supplies them to scene memories 3a and 3b via lines 44εL and 44b, respectively.

The scene memories 3a and 3b further include a level detection section 7a.
, 7b via lines 45a, 45b. When the cross-fade levels A and B decrease from 100%, this write signal is detected by the level detection section 7a in synchronization with this.

It is output from 7b. When the scene memories 3a and 3b receive this write signal, the outputs of the detection sections 43a and 43b are taken in and stored therein.

During rehearsal, the selector switch 42a.

42b is selected to be in the state shown by the solid line in FIG. Therefore, the output of the preset fader section 41 is sent via lines 46a and 46b to the changeover switches 42a and 42b, and then to the multiplier 15a.

15b. The preset fader section 41 is configured to include a preset fader row that can set the dimming levels of at least two scenes, and for example, the dimming control of the lighting load 2 is controlled by the dimming level derived to the line 46a. In cases where
The dimming level to be derived on line 46b can be set.

When cross-fading from the current scene to the next scene is performed in this way, the preset fader section 4
1, preset fader settings are made to realize the dimming level of the current scene and the dimming level of the next scene. The preset fader section 41 is supplied with an address signal from the control section 20, and the setting level of the preset fader of the channel corresponding to this address signal is derived to lines 46a and 46b.

Crossfader 5a is operated and its output level is 0%
When changing from 100% to 100%, the multiplier 15a multiplies the dimming level derived from the preset fader section 41 to the line 46a by the cross-fade level A output from the cross-fader 5a. At this time, for example, if the dimming level guided to the line 46b is zero, the lighting load 2 gradually transitions from the off state to the dimming level guided by the preset fader section 41 to the line 46a.

When the cross-fade level A reaches 100%, the operator operates the preset fader row fj corresponding to the line 46b included in the preset fader section 41 to set the dimming level for the next scene. When a crossfade between the current scene and the next scene is performed, the crossfade level A output from the crossfader 5a changes from 100% to 0%, and the crossfade level B output from the crossfader 5b changes from 0% to 0%. It changes from to 100%.

When the crossfade level A slightly decreases from 100%, in synchronization with this, the level detection unit 7a outputs line 4.
A write signal is derived at 5a.

This raises the power n+? s15. The output of a is detected by the detection unit 43
a and line 44a to the scene memory 3rL. The dimming data written at this time is applied to the multiplier 15a where the cross-fade level A is approximately 100%.
Therefore, it corresponds to the dimming level output by the preset fader section 41 to the line 46a.

When crossfading from the current scene to the next scene by using the crossfaders 5a and 5b, is the crossfade level A 100? 6 to 0%, the current gene corresponding to the dimming level that the preset fader section 41 outputs to line 16a is faded out, and the preset fader section 41 changes to line 4.
The next scene corresponding to the dimming data derived in step 6b is faded in.

When crossfade level B reaches 100%, t's
The person f'P then operates the preset fader row corresponding to line 46a to further set the dimming level for the next scene. When the next cross-fade is performed, the dimming level derived from the preset fader section 41 to the line 46b is written into the scene memory 3b.

By sequentially performing similar (i) operations, it becomes possible to write dimming data during rehearsal.

During actual production, the common terminals T 6 a and T 6 b of the changeover switches 42a and 42b are connected to the terminal T5, respectively.
a, connected to T5t+ (that is, the state shown by the broken line in FIG. 7), so that the dimming level set in the preset fader section 41 is changed to the preset fader section 4 during rehearsal during the actual performance.
1, that is, it will be played automatically. In this way, in this embodiment, it is not necessary to input the dimming data into the scene memories 3a and 3b before rehearsal, and it is possible to input the dimming data sequentially during the rehearsal. This will save you time.

Effects of the Invention As described above, by applying the present invention, it becomes possible to realize non-linear or loss fade characteristics without unnecessarily increasing the stored data, and lighting effects can be performed more effectively. It becomes like this.

In addition, since the output of the level detection means and the output of the timekeeping means are stored in correspondence with each other in the memory r2, even when the crossfader output does not monotonically increase/decrease, such a loss fade It becomes possible to reproduce the characteristics.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration 3 of a light control device 1 which is an embodiment of the present invention, FIG. 2 is a block diagram showing the basic configuration of the calculation section 12a, and FIGS. The figure is a diagram for explaining the movement Ip of the light control device 1 during rehearsal, and FIG. 6 shows the movement f? of the calculation unit 12 EL. FIG. 7 is a block diagram showing the basic configuration of a light control device 51 which is another embodiment of the present invention, and FIGS. 8 and 9 are diagrams explaining the prior art. It is. 1.51... Light control device, 3a, 3b... Scene memory, 5a, 5b... Cross fader, 7a, 7b...
・Level detection section, 8...Timer, 10a, 10b...
・Fade memory, 12a, 12b... Arithmetic department agent Patent attorney Number of strokes Keiichi Figure 2 Figure 3 Time measurement Figure 4 Figure 5 Time measurement Figure 6 Time measurement

Claims (1)

[Scope of Claims] A crossfader for manually performing a fade operation of a lighting load; a timekeeping means for performing a timekeeping operation and generating a timing pulse; and a plurality of reference levels to which a crossfader output is given and at which the crossfader output is predetermined. level detection means that outputs the crossfader output in synchronization with the timing pulse when the level detection means output changes through any one of the timing pulses; and storage means that also stores the time measurement means output when the level detection means output is stored. and an interpolation calculation means for calculating an approximate level of the cross fader output by interpolation from temporally adjacent time measurement means output data and corresponding level detection means output data in the stored content of the storage means. Light control device.