JPH0381994A - Dimming device - Google Patents

Abstract

PURPOSE:To accomplish dimming with excellent operating easiness by summing up the dimming level, at the time of scene changeover by cross fader for every channel, and the modification data level from a modification data generating device by a dimming data generating device. CONSTITUTION:Data is read to a CA side memory buffer 2a or a CB side memory buffer 2b one bit after another in conformity to a channel select signal S from a control part 2e, and fed to a cross fader computing part 4 together with a cross fade level set by a cross fader 3, followed by computation between the two, and dimming level C at the time of scene changeover is emitted. The level modification data + or -m set by a modification control part 5a is, on the other hand, accommodated in a modification memory buffer 5b and added to the level C by an adding circuit 6. The result therefrom is converted by a D/A converter 7 into analog data and given to an applicable dimmer by a demultiplexer 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a light control device suitable for controlling lighting in theaters, halls, studios, and the like.

BACKGROUND OF THE INVENTION FIG. 3 is a block diagram showing a general configuration of a light control device used in theaters, halls, studios, etc. The light control device 41 includes a light control unit 42 and a light control console 43. The light control unit 42 is a lighting load circuit w
The lighting load circuits W1 to Wn consist of a plurality of dimmers PL, P2゜..., Prr provided corresponding to the dimmers PL, W2+-+WII, and the lighting load circuits W1 to Wn correspond to the corresponding dimmers Pl.
~Pn individually.

The light control console 43 is provided with an operation section 44, a storage section 45, a control section 46, a calculation section 47, a signal output section 48, and the like. The operation unit 44 is equipped with input means such as a plurality of numeric keys and wheels, and is used to set load combinations (channels) and lighting levels corresponding to lighting effects for each scene in advance, and to input set data. is stored in the storage unit 45.

The control unit 46 sequentially reads the data in synchronization with the progress of the program, and the calculation unit 47 calculates the necessary dimming level from the read data and applies these data to a cross fader (not shown) to display data from one scene. Plan the transition to the next scene I\. The signal output unit 48 creates dimming signals S1 to Sri based on the dimming level and outputs them to the dimmers P1 to P1.
rr, and dimming control is sequentially executed.

On the other hand, on stage, the situation changes due to the exchange of props and props, and many P4 keys occur where the previously stored dimming data must be corrected and rewritten. However, since it is difficult in terms of time to perform such a correction work during playback, a method has been adopted in which the dimming level is corrected in the form of a negative hour correction.

No. 4 [2I] is a block diagram showing a circuit configuration of a conventional dimming device 41 having such a temporary correction function, and parts corresponding to those in FIG. 3 are given the same reference numerals. The lighting load circuits w l and W set by the input operation unit 44
2, . . . , Wn dimming level data is stored in the channel level storage section 45c, sequentially read out to the CA side memory buffer 45a and the CB side memory buffer 45b, and is subjected to crossfade calculation by the crossfader calculation section 47. Then, the calculation results are converted into analog data by a digital/analog converter 48, and the dimming signals s1 to Srl are sequentially distributed and input to the dimmers P1 to Prs via a demultiplexer 49. .

The light control device 41 has input means (U
! A correction operation section 51 in which a U (not shown) is arranged is provided. The correction operation section 51 uses the CA side memory buffer 45a.
Alternatively, the CB side memory buffer 45b is selected, and the currently read data is corrected and rewritten. Thereafter, the crossfader calculation section 47 performs calculation and crossfade operation using the above correction data, and derives the dimming level data converted into analog data to the dimmers Pi to Prl.

FIG. 5(1) and FIG. 5(2) are graphs showing such a correction operation of the light control device 41.

For example, in Fig. 5 <1>, one channel CH
The dimming level of rr is set to level v1 at time t1 and to level v2 at time t2, which is cross-faded by scene change, and the data for this is stored in the CA side memory buffer 45a and CB@memory buffer 4.
5b, data from the CA side memory buffer 45a is set to the fader CA of a crossfader (not shown), and data from the CB side memory buffer 45b is set to the fader CB.

At this time, fader CA is 100 (%) and fader CB is 0 (%), so at time t1 CAf
The dimming level based on the data from the il memory buffer 45a is output, and at time t2 when the cross-fade ends, the dimming level based on the data from the CB side memory buffer 45b is output.

Now, if the memory buffer 45a on the CA side is selected at time t1 and the level is corrected from vl to v3, the cross-fade operation is completed and CA=0 (S's),
The change in the dimming level of the channel CHrr up to time t2 when CB=100 (%) changes as shown in the graph represented by line Zll to line Z12.

Further, in FIG. 5(2), it is assumed that the dimming level is set to level v4 at time t3, and then cross-faded to level v6 at time t4. Now, if we select the CB side memory buffer 45b at time t3 and correct the level at time t4 after the crossfade ends from v6 to v5, then the crossfade operation ends and CA=O(%). , CB=1(LO(9≦〉)The change in the dimming level up to time t4 changes as shown in the graph represented by line 113 to line 114.

Problems to be Solved by the Invention As described above, the correction method according to the conventional technology directly and absolutely converts the input data to the cross-fade calculation unit 47, that is, the data read from the CA-side memory buffer 45a or the CB-side memory buffer 45b. It was a method to modify at the level.

This is a method of modifying the currently output dimming level or the target dimming level for one crossfade process, so it is relatively easy to modify one crossfade process, but on the other hand, It is limited to one scene change period.

In addition, in such a modification, the slope of the graph differs between before and after the modification. In other words, the rate of change in the brightness of the lighting is different before and after the correction, and the lighting is extremely flat.

Regarding the correction method, the characteristics desired by the user (director) of the light control device are indicated by the virtual line 11 in Fig. 5 (1> and Fig. 5 (2)).
It goes without saying that the level after correction as shown in 51!16 is a parallel shift of the level before correction. However, in order to obtain such characteristics with the conventional function, it is necessary to , that is, the times tl, t2 . . . when the crossfade starts or ends. t3. . . . each time the memory buffer 45a or the memory buffer 4
The data must be read out to 5b' and corrected, resulting in complicated operations and problems such as hindering the smooth progress of the performance. A technical challenge has been to create a light control device that solves these problems.

The present invention has been made to solve the above-mentioned problems, and its purpose is to adjust the lighting load by adjusting the level of any channel before a crossfade operation accompanying a scene change or during playback. It is an object of the present invention to provide a light control device that prevents the rate of change of light level from undesirably fluctuating and that makes the level correction effective over a plurality of scenes or all scenes of the light level.

Means for Solving the Problems The present invention includes a control device for dimming control of a lighting load, and a correction data generating means for generating correction data for correcting dimming control data set by the control device. The control device includes: a first dimming data generating means and a second dimming data generating means each generating dimming data for each continuous time range of the lighting load group; A crossfader that converts the M control state from dimming data of one time segment to dimming data of another time segment, and each fader output of the crossfader and dimming from the first and second dimming data generation means. a first dimming control data generating means for performing fade calculations between the corrected data from the corrected data generating means and the first dimming control data based on the calculated results; and a second dimming vI control data generating means for adding the dimming control data and generating the second dimming control data so that the illumination load is dimmed.

Function: The light control device according to the present invention has a first light control data generating means and a second light control data generating means in the control device at the time of cross-fade of the lighting load.
The data output from the dimming data generating means and the crossfader are fade-calculated by the first dimming control data generating means to generate first dimming control data, and the data is combined with the corrected data from the corrected data generating means. The second dimming control data is added to the first dimming control data by the second dimming control data generating means to generate the second dimming i,
II control data is generated, and the lighting load is dimmed and controlled based on the second dimming control]n data.

Embodiment FIG. 1 is a block diagram showing the electrical configuration of a dimming device 1 according to an embodiment of the present invention. The dimmer 1 includes dimmers P1, P2, .・
..., a predetermined calculation between Pr1 (generally referred to as P), the dimming control section 2, the crossfader 3, and the outputs from the dimming control section 2 and the crossfader 3. a cross-fade calculation unit 4 that performs the adjustment, a level correction control unit 5 that is a correction data generation means that corrects the dimming level for each channel, and a level correction control unit 5 that converts the output of the level correction control unit 5 into the pre-correction data that has already been set. a second adder circuit 6 as a second dimming control data generating means to add to the dimmer P; a digital/analog converter 7 to convert the output of the second adder circuit 6 into analog data; The demultiplexer 8 distributes and supplies dimming signals sl, s2, . . . , sr+.

The dimmer P uses, for example, a semiconductor AC switching element, is individually phase-controlled by the dimming signals s1, ~Sn, and corresponds to the lighting load circuits W1 to Wn (generally referred to as W). > is energized with power at a desired dimming level. Each lighting load circuit W includes a plurality of lighting loads LL,
L2. ..., Ln is connected.

The dimming control section 2 includes a memory buffer 2a as a first dimming data generation means, a memory buffer 2b as a second dimming data generating means, an input operation section 2c, a channel level storage section 2d, and a signal flow of the entire device. and a control section 2e that controls the timing. The input operation unit 2C is equipped with input means such as a plurality of numeric keys, wheels, and switches (not shown), and inputs data about combinations of load circuits W for each gene, so-called channels, which are set based on a predetermined program. and dimming level data for each channel are set, and these data are stored in the channel level storage section 2d.

The above data is sequentially changed to CAII! by the channel selection signal S from the control section 2e. The signal is read out to the memory buffer 2a or the CB side memory buffer 2b, and inputted to the crossfader calculation unit 4 together with the crossfader level set by the crossfader 3, and a predetermined calculation is performed between the two.

The crossfader 3 consists of a pair of faders CA and CB. When you operate a commonly engaged knob and move one fader (for example, fader CA) from 0% to 100%, the other fader (for example, fader CA) changes from 0% to 100%. Fader CB), on the other hand, is cross-connected to each other so that it becomes 100%-0%.

The crossfader calculation unit 4, which is the first dimming control data generation means, includes a pair of multiplication circuits 4a and 4b corresponding to the CA side memory buffer 2a and the fader CA, and the CBg memory buffer 2b and the fader CB, and a first addition circuit. 4C and
A pair of analog/digital converters 4 ci v 4 e
It is made up of.

The multiplication circuits 4a and 4b input data Da and Db from the CA side memory buffer 2a and the CB side memory buffer 2b according to the channel selection signal S from the control unit 2e.
A pair of faders CA and CB forming crossfader 3
The following two multiplications Ca-Da, Cb-Db ・=(
1), and the first addition circuit 4 (addition C= (
Ca-Da) + (Cb-Db> - (2) is executed. The calculation result C is sent to one input terminal of the second addition circuit 6, which is the second dimming control data generation means connected to the next stage. Correction data (±m) from the correction control unit 5, which will be described below, is input to the other input terminal.

The modification control section 5 includes a modification operation section 5a and a modification buffer memory 5b. The correction operation section 1 5 is the input operation section 2
With a configuration similar to c, level correction data 10 m is set for the dimming level of the channel currently being output in the direction of addition (increase in dimming level), and level correction data rn is set in the direction of subtraction (decrease in level). The level correction data (±m) set by the correction operation section 5a is stored together with the channel data in the correction memory buffer 5b, and read out by the channel selection signal S from the control section 2e.

The read level correction data (±m) is input to the second addition circuit n6, and addition C+m −=<3) is executed together with the calculation result C in the crossfader calculation section 4, and the addition result is digitally/ After being converted into analog data by the analog converter 7, the data is provided to the respective corresponding dimmers P by the demultiplexer 8. As a result, the level can be easily corrected even when the dimming level of one channel is currently being output, and since the setting and calculation of the correction level are performed in synchronization with the channel selection signal S from the control section 2e, Correction levels can be set for each individual channel.

FIG. 2 is a graph showing the operation of this embodiment.

Now, the dimming level of a certain channel CHrr is at time t1.
Assume that the level v1 is set to level v2 at time t2 by a cross-fade operation after time t1. The change in the dimming level of channel CHrr at this time is shown by a graph represented by line 11.

Here, the dimming level v1 of channel CHn is increased by level m (vl+rn) or decreased (vl-m).
At time t1, the 1121st correction operation section 5
If the dimming level is corrected from V to v l +m via the second addition circuit 6 by manipulating a, the subsequent change in the dimming level will be the graph shown by line 12, and the line before correction will be 11 and always maintains a constant level difference rn, and reaches the dimming level v2+-m. This consists of data C from the crossfader calculation section 4 and data (±r) from the correction control section 5.
It goes without saying that n) is always added by the second addition circuit 6. Therefore, even after level correction, the slope of the level change remains the same.

It is exactly the same when the dimming level is corrected from vl to vl-m, and the change in dimming level at this time becomes the graph shown by line 13, and the dimming level v 2- r
Reach n. In either case, it is equivalent to parallel movement of the line 11 before correction, and the rate of change in brightness remains unchanged before and after correction. Therefore, the lighting performance is performed smoothly and is constant over the entire period.

The above explanation was about level correction before the start of a crossfade, but correction can also be made during a crossfade, that is, during a scene change, and the operation and situation after correction are the same.

In this way, the light control device according to the present invention allows the light control level to be modified at any point in time, and moreover, the light control device according to the present invention can adjust the light control level at any time.
Alternatively, the correction value is valid over the entire scene.

Effects of the Invention As described above, the light control device according to the present invention generates second light control data based on the light control level at the time of scene change by the cross fader set for each channel and the correction data from the correction data generating means. The desired dimming level is obtained by adding the values using a means.

Therefore, the level difference between the dimming level obtained after modification and the dimming level before modification is always constant, and the rate of change in brightness of the illumination before and after modification remains unchanged. Therefore, smooth lighting performance is achieved. Furthermore, since the level correction operation of the light control device according to the present invention can be performed at any time, the correction operation for multiple scenes or all scenes becomes simple and easy, and a light control device with extremely high operability is realized. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a light control device according to an embodiment of the present invention, FIG. 2 is a graph showing its operation, and FIG. 3 is a block diagram showing a general structure of the light control device. FIG. 4 is a graph showing the operation, and FIG. 5 is a graph showing the correction operation of the light control device 41. DESCRIPTION OF SYMBOLS 1... Light control device, 2... Light control control part, 2a, 2b.
...Memory buffer, 2c...Input operation section, 2d...
-Memory, 2e...Control unit, 3...Cross fader, 3a. 3b... A pair of faders forming a crossfader,
4...Cross fader operation section, 4a, 4b...Multiplication circuit, 4c...First addition circuit, 4f...Second addition circuit, 5...Modification control section, 5a...Modification operation Section, 5b
...Modification memory buffer, L1-Ln...Lighting load circuit, P1-Prt...Dimmer

Claims (1)

[Scope of Claims] A dimming control device comprising: a control device that controls dimming of a lighting load; and a correction data generation means that generates correction data for correcting dimming control data set by the control device. The control device includes: a first dimming data generating means and a second dimming data generating means each generating dimming data for each continuous time range of the lighting load group; and a dimming control state. A crossfader that converts dimming data of one time segment to dimming data of another time segment, and between each fader output of the crossfader and dimming data from the first and second dimming data generation means. and a first dimming control data generating means for performing fade calculations respectively at and outputting first dimming control data based on the calculation results, the corrected data from the corrected data generating means and the first dimming control data. and second dimming control data generating means for adding the second dimming control data and controlling the dimming of the lighting load.