JP2728414B2 - Light control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light control device for performing a lighting effect on a stage or a studio.

2. Description of the Related Art Generally, a large number of lighting loads are used in a stage, a studio, or the like, and the light control level of each of a plurality of predetermined lighting load groups (hereinafter, referred to as channels) is adjusted in a control room or the like. Is controlled intensively. In a light control device used for performing such light control, a light control data relating to a light control level of each channel for each scene to be produced (hereinafter, referred to as a scene) is stored in a storage device which is previously contained therein. The dimming data is stored and read out for each scene so that the lighting load of each channel is set to a desired dimming state.

The transition between scenes is performed by a so-called cross-fade operation in which the fade-out of the current scene and the fade-in of the next scene are performed in parallel. With this cross fade, the two still scenes of the current scene and the next scene can be loosely connected. In manual crossfading, a crossfader that takes care of the fade-out of the current scene and a crossfader that takes care of the fade-in of the next scene are used. The two crossfaders are arranged in parallel such that their scales are in opposite directions. Therefore, by simultaneously moving the two crossfaders in the same direction, crossfading can be realized.

In the crossfader, a scale indicating a reproduction rate of a dimming level of a scene assigned to each crossfader (hereinafter, referred to as a crossfading level) is, for example, 0% to 100%.
It is written as%. That is, set the crossfader to 0
By operating in the direction from 100% to 100%, the fade-in operation of the scene covered by the crossfader can be performed, and conversely, by operating in the direction from 100% to 0%, the scene can be changed. A fade-out operation can be realized.

In recent years, for example, crossfades are manually performed at the time of rehearsals of performances. At this time, the time required for operation of the crossfader (hereinafter, referred to as fade time) is stored in a storage device. The time is read out to automatically implement crossfading. The fade time is
This is the time required for the crossfade level to change between 0% and 100%.

FIG. 8 shows a change during reproduction of the crossfade level when automatic crossfade is performed. For example, in the storage device, the fade time TF1,
TF2 is stored, and when the crossfading is started at time t0, the crossfading level becomes 100% at time t1 after elapse of the fading time TF1 from time t0.
Reach That is, the transition between scenes ends in the period from time t0 to t1. When the cross fade is instructed at time t2 and the fade out of the current scene is instructed, the cross fade level becomes 0% at time t3 after a lapse of the fade time TF2 from time t2. At this time, the fade-in of the next scene is performed at the same time, and the cross fade level of the next scene is 0% at time t2.
At time t3, it is 100%.

Since the storage device stores the fade times TF1 and TF2 as described above, the cross fade level at times other than the times t0, t1, t2, and t3 must be obtained by calculation. Normally, such calculation is performed such that the cross-fade level changes linearly with respect to the fade time as shown in FIG.

However, the operation of the crossfader at the time of rehearsal is not limited to an operation that is necessarily changed in proportion to time, and there are cases where the crossfader is operated faster or slower in the middle of the crossfader. In order to realize such a cross fade, it is necessary to manually operate the cross fader even in the actual operation to correct the cross fade level. With such a method, it is not possible to accurately reproduce a crossfade level that is complicatedly changed during rehearsal.

In order to solve such a problem, in another prior art, at the time of rehearsal, that is, at the time of manual operation of the crossfader, the crossfader output is periodically sampled, and the crossfader output corresponding to each time is stored in a storage device. ing. FIG. 9 shows a change in the crossfade level at the time of the reproduction, that is, in the case where the storage contents of the storage device are read and the crossfade is automatically performed. That is, at each time t10, t11, t12,... For each sampling period Δt, the crossfading level L0, L1, L2,.
Are determined, and as a result of determining the crossfade level at a plurality of times during one crossfade operation, a non-linear change in the crossfade level with respect to time can be reproduced.

However, in order for the change in the dimming level of the lighting load to feel smooth, the above-mentioned sampling period Δt is 50 msec.
The following must be selected. For example, a large-capacity memory is required to realize a crossfade for several minutes, which is not practical.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems, and to realize a non-linear cross-fading characteristic without unnecessarily increasing stored data. An optical device is provided.

Means for Solving the Problems The present invention provides a crossfader for manually performing a fade operation of a lighting load, a timing unit for performing a timing operation and generating a timing pulse, and a crossfader output provided. A level detecting means for outputting a cross-fader output in synchronization with a timing pulse when the output signal changes by passing through any one of a plurality of predetermined reference levels; Interpolating the approximate level of the crossfader output from the storage means in which the output is also stored, and from the output data of the timing means which are temporally adjacent to each other and the output data of the corresponding level detection means in the storage contents of the storage means. Interpolation operation means, one of a cross fader output and an interpolation operation means output, and a predetermined illumination Multiplying the load of the dimming level, a light control device which comprises a multiplication means for determining a dimming level when fade operation of the lighting load.

In the present invention, when the fade operation of the lighting load is manually performed using the crossfader, the output of the level detecting means and the output of the time measuring means are stored in the storage means. The level detector outputs the crossfader output in synchronization with a timing pulse generated by the timer when the crossfader output changes by passing through one of a plurality of predetermined reference levels. The output of the timing means is stored together with the output of the level detection means in the storage means.

When the fade operation is automatically performed on the lighting load based on the storage contents of the storage means, the approximate level of the crossfader output is obtained from the time-measuring means output data which is temporally adjacent and the corresponding level detection means output data. Is calculated by the interpolation calculation means. As a result, it is possible to realize a cross-fade operation non-linearly with respect to time without unnecessarily increasing the data stored in the storage means.

The predetermined dimming level of the lighting load is multiplied by the multiplying means by one of the cross fader output and the output of the interpolation calculating means, and the dimming level at the time of the fade operation of the lighting load is obtained.

Embodiment FIG. 1 is a block diagram showing a basic configuration of a light control device 1 according to one embodiment of the present invention. In the light control device 1, the control of the light control level is performed for each group of a plurality of lighting loads 2 (hereinafter referred to as channels).
Dimming data corresponding to the dimming level of each channel in each scene corresponding to each scene of the performance to be produced is input in advance to the scene memories 3a and 3b. Scenes to be produced are provided with scene numbers such as 0, 1, 2,... In a chronological order. For example, the scene memory 3a stores dimming data of scenes with odd scene numbers. The scene memory 3b stores dimming data of a scene having an even scene number. Hereinafter, a set of light control data corresponding to all channels of each scene is referred to as scene data.

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

On the crossfaders 5a and 5b, a scale indicating a crossfade level (0% to 100%) is written, and the crossfaders 5a and 5b are arranged so that the scales are opposite to each other. Therefore, by operating the crossfaders 5a and 5b in the same direction and simultaneously, the scenes stored in the scene memory 3b are changed in accordance with the fade-in / fade-out of the scene corresponding to the scene data stored in the scene memory 3a. Fade out / fade in of the scene corresponding to the data is performed.

The output of the crossfader 5a is provided to a level detector 7a via a line 6a. The level detection unit 7a is also provided with a timing signal via a line 9a from a timer 8 which is a timing means for performing a timing operation and generating a timing signal. The output of the level detector 7a is provided to a fade memory 10a as storage means. The fade memory 10a is also provided with data relating to the measured time from the timer 8 via a line 11a.

In the level detector 7a, the output level of the crossfader 5a (hereinafter, referred to as crossfade level A) is set to a plurality of predetermined reference levels (for example, 0%, 10%, 20%,..., 100 of the crossfader level). %)
When the time passes, the crossfade level A is applied to the fade memory 10a in synchronization with the timing signal, and at the same time, the time measured by the timer 8 to be output to the line 11a is stored in the fade memory 10a.

The output of the fade memory 10a is supplied to a cross fade level calculator (hereinafter referred to as a calculator) 12 serving as an interpolation calculator.
a, the output of which is supplied to the terminal T1a of the switching switch 13a.
Has been given to. The terminal T2a of the switching switch 13a is connected to the line 6a via the line 14a, and thus receives the output of the cross feeder 5a.

The common terminal T3a of the switching switch 13a is connected to the multiplier 15a. The multiplier 15a is also provided with the output of a playback scene buffer 16a that sequentially reads out and holds the scene data of the scene currently being played back from the scene memory 3a. The crossfading level is derived from the common terminal T3a of the switching switch 13a, and therefore the multiplier 15a multiplies the crossfading level by the dimming level. The output of the multiplier 15a is provided to one input terminal 17a of the adder 17. The reproduction scene buffer 16a holds the 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. .

Regarding the crossfader 5b, a configuration similar to the configuration related to the crossfader 5a described above is provided,
In FIG. 1, the reference numerals of the corresponding parts are indicated by adding a suffix b. In the following, the output level of the crossfader 5b is referred to as crossfading level B.

The switching switches 13a and 13b are in the state shown by solid lines in FIG. 1 during rehearsal and in the state shown by broken lines in actual operation. As a result, the crossfaders 5a and 5b are provided to the multipliers 15a and 15b during rehearsal.
Are output, and the outputs of the operation units 12a and 12b are supplied during the actual production.

The adder 17 performs an addition operation on the outputs of the multipliers 15a and 15b. The output of the adder 17 is supplied to a plurality of dimmers provided for each channel through a sample and hold circuit 18.
Given to 19. Each dimmer 19 is connected to a plurality of lighting loads 2 of each channel.

Scene data of one scene is read from the scene memories 3a and 3b into the reproduction scene buffers 16a and 16b, respectively.
Such a playback scene buffer 16a, 16b includes a control unit 20.
, Respectively. The reproduction scene buffers 16a and 16b output the address signals from the reproduction scene buffers 16a and 16b.
The dimming level for each channel is sequentially output. The address signal output from the control unit 20 is also supplied to the sample and hold circuit 18. The sample-and-hold circuit 18 includes, for example, a plurality of analog switches corresponding to the respective channels, and the plurality of analog switches are sequentially and selectively turned on by an address signal. In other words, the dimming level of each channel is sampled and held in a time-series manner. The dimming level for each channel thus held is supplied to the dimmer 19 corresponding to each channel as a control signal.

The dimmer 19 includes, for example, a thyristor and a triac, and the lighting load is controlled by controlling the firing angle of the thyristor and the triac by a control signal provided from the sample and hold circuit 18. 2 is performed, whereby the plurality of lighting loads 2 are brought into a dimming state corresponding to the scene data.

FIG. 2 is a block diagram showing a basic configuration of the calculation unit 12a. After changing through one of the reference levels predetermined by the level detection unit 7a as described above, the cross-level A when the timing signal is given and the cross-level A
Is stored in the fade memory 10a and the time measured by the timer 8 is stored, so that temporally discontinuous data is stored. In the calculation unit 12a, an interpolation calculation is performed on the discontinuous data.
The calculation unit 12a includes a parameter setting unit 31 for setting a parameter Δ described below for performing such interpolation calculation.
Is provided. The parameter Δ is a parameter relating to the time for maintaining the same crossfading level as described later.

The output of the parameter setting unit 31 is given to the comparator 32. The comparator 32 is also provided with the output of a counter 33, to which a clock signal is supplied from a clock generator. The comparator 32 outputs a detection pulse when the output of the parameter setting unit 31 (that is, the parameter Δ) matches the output of the counter 33, and the detection pulse is given to the up-down counter 35. The output of comparator 32 is also provided to counter 33 as a reset signal. Thus, the counter 33 repeats the counting operation until the count value reaches the parameter Δ.

The count value of the up-down counter 35 is incremented or decremented by one each time a detection pulse is given. Whether the operation in the up-down counter 35 is an addition operation or a subtraction operation is determined by an operation control signal provided from an operation setting unit 36 described later.

The output of the up-down counter 35 is supplied to a digital / analog (hereinafter, referred to as D / A) converter 37 and converted into an analog signal. The D / A converter 37 is a fade memory 1
Crossfade level given from 0a is 0% to 100%
In the case of changing to 100 steps, it is sufficient to be able to cope with the input of 7 bits. That is, up-down counter 35
If the input from is (0000000) ₂ , its output will be at the voltage level corresponding to the crossfading level 0%,
When (1100100) ₂ (= 100), an analog voltage level corresponding to the crossfading level of 100% is output. However, the suffix “2” indicates that the number in parentheses is a binary number.

The configuration of the calculation unit 12b is also the same as the configuration shown in FIG.

Fig. 3 shows crossfaders 5a and 5b during rehearsal.
Is a graph showing a change in the crossfade level A which is operated sufficiently slowly compared with the generation cycle of the timing signal (for example, 1 sec) and is led to the line 6a at this time. FIG. 3 shows a change in the crossfading level A with respect to the time measured by the timer 8. With reference to FIG. 3, a description will be given of the operation of writing the crossfade level A to the fade memory 10a and the data related thereto during the rehearsal.

In the level detection section 7a, levels corresponding to 0%, 10%, 20%,..., 100% of the crossfading level are set as reference levels. The level detector 7a compares the output level of the crossfader 5a (crossfade level A) with the reference level, and when the crossfade level A passes one of the reference levels, the timing given thereafter. At the timing of the signal, the crossfade level A at that time, that is, the time when the timing signal is given, is given to the fade memory 10a. At this time, the measured time derived from the timer 8 to the line 11a is simultaneously written into the fade memory 10a. When the cross faders 5a and 5b are operated to change the cross fade level A output from the cross fader 5a as shown in FIG. 3, data shown in Table 1 is written into the fade memory 10a, for example.

At the start of the operation of the crossfader 5a from 0% to 100%, when the level detector 7a detects an increase in the crossfade level A, the level detector 7a gives 0% as the crossfade level A to the fade memory 10a. . At this time, the time T ₀ measured by the timer 8 is equal to the cross fade level A (0
%) Is stored in the fade memory 10a.

When the crossfade level A changes after passing 10%, the level detector 7a gives the crossfade level A at that time to the fade memory 10a when a timing signal is given after the passage is detected. However, since the change in the crossfade level A is sufficiently slow as compared with the generation cycle of the timing signal, the crossfade level A given to the fade memory 10a at this time is a value near 10%. The cross full Aid level A (10%) is the time given to the Fuedomemori 10a, at the same time, the counted time T ₁ of the timer 8 is written to Fuedomemori 10a.

Similarly, crossfade level A (20%, ..., 100
%) Along with measured time T ₂ of the timer 8 at the time of cross-off Aid level A is the respective level, ..., T ₁₀ is stored in the Fuedomemori 10a.

In time the counting time of the timer 8 is T _11, when an operation directed to 0% from the scale 100% cross fader 5a is started, the Fuedomemori 10a counted time T ₁₁ with cross full Aid level A (100%) is It is memorized. Thereafter, when the cross fader 5a is operated toward the scale 0%, the cross fade level A (90%, 80%,.
%) In response to the measured time T _12, T ₁₃ of each cross full Aid level A with the timer 8, ..., T ₂₁ Yuku is sequentially written into Fuedomemori 10a. At this time, the data shown in Table 2 is written in the fade memory 10b. In the same manner, the data of each cross fade between scenes is stored in the fade memory in accordance with the operation of the cross faders 5a and 5b.
Written to 10a, 10b. However, the clock times T ₀ , T ₁ ,... In Tables 1 and 2 are the same clock times.

FIG. 4 shows that the crossfader 5a has the timer 8 connected to the line 9a.
7 is a graph showing a change in the crossfading level A when the operation is performed sufficiently fast compared to the period of the timing signal derived in FIG. In the level detector 7a, when the passage of the reference level of the cross-fade level A is detected, when the timing signal is given, the cross-fade level A at that time is given to the fade memory 10a so as to be given to the fade memory 10a. The crossfade level A does not necessarily include values near all reference levels. At the time corresponding to each of the times T _{0 to} T ₆ of the timer 8, when the first timing signal is given after the crossfade level A changes after passing through any one of the reference levels, the fade memory 10 a Indicates the crossfading level A (0
%, 50%, 100%, 100%, 70%, 35%, 0%).
At this time, the measured time T ₀ through T ₆ are simultaneously stored. Thus, the data shown in Table 3 is written to the fade memory 10a, and the data shown in Table 4 is written to the fade memory 10b. However, the clock times T _{0 to} T ₆ in FIG. 4 are independent of the clock times T ₀ , T ₁ ,... In FIG. Therefore, the clock times T ₀ , T ₁ ,... Displayed in Tables 3 and 4 and T shown in Tables 1 and 2
₀ , T ₁ , ... do not have a subordinate relationship. The measured time T ₀ of Table 3 and Table 4, T _1, ... are each the same clocking time.

FIG. 5 shows the operation of the crossfaders 5a and 5b.
It is a graph which shows the change of the crossfading level A when the operation direction is changed in one crossfading operation | movement. However, it is assumed that the change of the cross fade level A is sufficiently slow as compared with the generation cycle of the timing signal. When the crossfade level A passes one of the reference levels, the level detector 7a provides the crossfade level A at that time to the fade memory 10a, so that the crossfade level A falls and the reference level is reduced. Also when passing through one, the writing of the cross fade level A to the fade memory 10a is performed. In response to the change of the cross fade level A as shown in FIG.
The data shown in Table 5 is written to the fade memory 10a, and the data shown in Table 6 is similarly written to the fade memory 10b. However, the time T ₀ shown in FIG.
T ₁ ,... Are independent of any of the clock times T ₀ , T ₁ ,. Tables 5 and 6
The clock times T ₀ , T ₁ ,... Shown in the table are the same.

FIG. 6 is a diagram for explaining the operation of the calculation unit 12a, and shows the output level of the calculation unit 12a. At the time of the actual operation, the contents stored in the fade memory 10a are given to the arithmetic unit 12a. The cross fade level A stored in the fade memory 10a is a so-called discontinuous value having a certain level substantially determined by the reference level set in the level detecting section 7a. If the output of the fade memory 10a is used as it is as a cross-fading level, the cross-fading level changes in a stepwise manner, as indicated by a curve 11 shown by a virtual line in FIG. The arithmetic unit 12a performs linear interpolation between the discontinuous data in the fade memory 10a as described above.

The parameter Δ calculated by the parameter setting unit 31 in FIG. 2 corresponds to the clock time T _i (where i is an integer), the clock time T _{i + 1} , and the clock times T _i and T _{i + 1.} cross off stored in Fuedomemori 10a Aid level V _i, V _{i + 1}
According to It is expressed as From the comparator 32, the parameter Δ
Every time interval corresponding to, the detection pulse is to be given to the up-down counter 35, the output of the D / A converter 37 is increased from the time corresponding to the counted time T _i of the timer 8 by 1% Eventually, the crossfading level V _{i +1 is} reached at the time of the clock time T _{i +1} of the timer 8. In this way, the cross fade level output from the calculation unit 12a changes smoothly as indicated by l2 in FIG.

When V _{i + 1} > V _i (2), the operation unit setting unit 36 outputs an operation control signal such that the operation in the up-down counter 35 is an addition operation, and V _{i + 1} <V _i .. (3), an operation control signal is output such that the operation is a subtraction operation. As a result, the third rehearsal
In the actual operation, the reproduction of the crossfade level can be performed with respect to the change of the crossfade level as shown in FIGS. 4, 5 and 6.

As described above, in the present embodiment, the level detectors 7a, 7
Reference level and crossfader 5 predetermined in b
a, 5b is compared with the crossfading level A, B output, the crossfading level A, at the timing of the timing signal after the passage of the reference level of the crossfading level A, B is detected B and the time measured by the timer 8 are stored in the fade memories 10a and 10b. The so-called discontinuous crossfade levels A and B stored in this way are subjected to interpolation processing in the calculation units 12a and 12b. In this way, a non-linear change in the crossfading level can be reproduced even with relatively little data. Furthermore, since the crossfades levels A and B and the measured time are stored in the fade memories 10a and 10b in association with each other,
Even if the crossfade levels A and B do not monotonically increase or decrease in one crossfade operation,
Such a cross-fading operation can be reproduced.

Even when the time required for crossfading is long, the data stored in the fade memories 10a and 10b does not increase unnecessarily, so that the storage capacity of the fade memories 10a and 10b can be selected to be relatively small. .

FIG. 7 is a block diagram showing a basic configuration of a light control device 51 according to another embodiment of the present invention. This embodiment is the same as the first embodiment.
The description is similar to that of the embodiment, and therefore the corresponding parts are denoted by the same reference numerals.

In the present embodiment, the dimming level corresponding to each scene can be input to the scene memories 3a and 3b during the rehearsal using the preset fader unit 41.

The output of the preset feeder section 41 is supplied to terminals T4a and T4b of the switching switches 42a and 42b via lines 46a and 46b. The output of the playback scene buffers 16a and 16b is
The signals are given to terminals T5a and T5b of the switching switches 42a and 42b, respectively. The common terminal T of the switching switches 42a and 42b
6a, the crossfade level derived to T6b is the multiplier 15a,
Given to 15b.

The outputs of the multipliers 15a and 15b are input terminals 17a and 17b of the adder 17.
And also to the detection units 43a and 43b. The detectors 43a and 43b are configured to include, for example, an analog / digital converter and the like.
Is converted to a digital signal, and the line 44a,
It is provided to the scene memories 3a and 3b via 44b.

The scene memories 3a and 3b are further provided with write signals from the level detectors 7a and 7b via lines 45a and 45b. This write signal has a crossfade level A, B of 100
%, The level detectors 7a and 7b synchronize with this.
Output from In the scene memories 3a and 3b, when this write signal is given, the outputs of the detectors 43a and 43b are fetched and stored therein.

At the time of rehearsal, the switching switches 42a and 42b
The state shown by the solid line in FIG. 7 is selected. Accordingly, the output of the preset feeder section 41 is connected to the line 46a,
From the switching switches 42a, 42b via 46b, the multipliers 15a, 15
given to b. The preset feeder section 41 is configured to include a preset feeder array capable of setting the dimming level of at least two scenes. For example, the lighting load is controlled by the dimming level derived from the line 46a. When the dimming control of No. 2 is performed, the line 46
The dimming level to be derived to b can be set.
When the crossfading operation from the current scene to the next scene is performed in this manner, the preset fader section 41 sets the preset fader for realizing the dimming level of the current scene and the dimming level of the next scene. Has been made. An address signal is supplied from the control unit 20 to the preset feeder unit 41, and the preset level of the channel preset feeder corresponding to the address signal is led out to lines 46a and 46b.

The crossfader 5a is operated and its output level is 0%
, The multiplier 15a multiplies the dimming level derived from the preset fader section 41 to the line 46a by the crossfading level A output from the crossfader 5a. At this time, for example, when the dimming level led out to the line 46b is zero, the lighting load 2 gradually shifts from the unlit state to the dimming level led out by the preset feeder unit 41 to the line 46a.

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

When the crossfade level A drops slightly from 100%, the level detector 7a synchronizes with the line 45a.
Is derived. Thus, the output of the multiplier 15a is written to the scene memory 3a via the detection unit 43a and the line 44a. The dimming data written at this time is
Multiplier 15a when crossfade level A is almost 100%
Output, the preset feeder section 41
This corresponds to the dimming level derived in a.

When performing crossfading from the current scene to the next scene by operating the crossfaders 5a and 5b, the crossfading level A changes from 100% to 0%, so that the preset fader section 41 leads the light control to the line 46a. The current scene corresponding to the level is faded out, and the preset fader section
The next scene 41 corresponding to the dimming data derived on line 46b is faded in.

When the cross fade level B reaches 100%, the operator next operates the preset fader row corresponding to the line 46a to set the dimming level of the next scene. Then, 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 the same operation, it becomes possible to write the dimming data at the time of rehearsal.

At the time of the actual operation, the common terminals T6a and T6b of the switching switches 42a and 42b are connected to the terminals T5a and T5b, respectively (ie, the state shown by the broken line in FIG. 7). Thus, at the time of rehearsal at the time of actual production, the dimming level set in the preset feeder section 41 is reproduced without operating the preset feeder section 41, that is, automatically. As described above, in the present embodiment, it is not necessary to input the dimming data before performing the rehearsal to the scene memories 3a and 3b, and the dimming data can be sequentially input at the time of the rehearsal. The time required can be saved.

Effect of the Invention As described above, according to the present invention, it is possible to realize non-linear cross-fade characteristics without unnecessarily increasing stored data, so that lighting effects can be performed more effectively. become.

Further, since the output of the level detection means and the output of the timekeeping means are stored in the storage means in association with each other, even when the crossfader output does not monotonously increase / decrease, such crossfading characteristics are reproduced. It becomes possible.

Further, since the predetermined dimming level of the lighting load is multiplied by one of the crossfader output and the output of the interpolation calculating means by the multiplying means, the dimming level at the time of the fade operation of the lighting load is properly obtained. Can be

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a light control device 1 according to an embodiment of the present invention, FIG. 2 is a block diagram showing a basic configuration of a calculation unit 12a, and FIGS. FIG. 6 is a diagram for explaining the operation of the light control device 1 at the time of rehearsal, FIG. 6 is a diagram for explaining the operation of the calculation unit 12a, and FIG. 7 is a light control device 51 according to another embodiment of the present invention. 8 and 9 are diagrams for explaining the prior art. 1,51… Dimming device, 3a, 3b …… Scene memory, 5a, 5b ……
Cross fader, 7a, 7b: Level detector, 8: Timer, 10a, 10b: Faded memory, 12a, 12b: Operation unit

Claims (1)

(57) [Claims] 1. 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 crossfader outputs provided with a crossfader output, wherein a plurality of predetermined crossfader outputs are provided. When the level changes after passing through any one of the reference levels, the level detecting means for outputting the crossfader output in synchronization with the timing pulse, and when the level detecting means output is stored, the output of the timing means is also stored. Interpolating means for interpolating the approximate level of the cross-fader output from the output data of the time-measuring means and the output data of the level detecting means corresponding thereto in the storage contents of the memory means; Multiply either one of the crossfader output and the output of the interpolation calculation means with the dimming level of the predetermined lighting load , Dimmer, characterized in that it comprises a multiplication means for determining a dimming level when fade operation of the lighting load.