JPH0329154B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a light control device that controls the light of a stage or the like.

BACKGROUND ART FIG. 1 is a block diagram of a conventional light control device. The channel selection circuit 1 generates a channel selection signal for sequentially selecting preset fader sections PF1, PF2, and PF3 by generating a clock signal and performing a counting operation. Further, a channel selection signal from the channel selection circuit 1 is given to a sample hold/drive circuit section 5. The preset fader sections PF1 to PF3 are for setting respective dimming levels of the lighting loads L1 to Ln connected to the sample hold/drive circuit section 5. For example, the preset fader section PF1 is set to each lighting load L for one scene.
Set the illuminance from 1 to Ln and press the preset fader section.
PF2 sets the illuminance of each lighting load L1 to Ln in the next scene. The cross fader section 3 crosswise switches the dimming levels of the lighting loads L1 to Ln set in the preset fader sections PF1 to PF3, respectively. The cross calculation circuit 4 receives the preset fader signals from the preset fader sections PF1 to PF3 and the cross fader signal from the cross fader section 3, and controls the sample hold/drive circuit section 5. The sample hold/drive circuit section 5 includes a sample hold circuit section and a drive circuit corresponding to each of the lighting loads L1 to Ln. The control signal from the cross calculation circuit 4 is given to the sample hold circuit of the sample hold/drive circuit section 5 selected by the channel selection signal from the channel selection circuit 1, sampled and held, and connected to the sample hold circuit. Operate the drive circuit. The drive circuit dims any of the lighting loads L1-Ln connected to it.

With the circuit configuration as described above, it is possible to create load dimming signals for controlling a large number of loads by time division.

FIG. 2 is an electrical circuit diagram of each preset fader section PF1, PF2, PF3 shown in FIG. Preset faders 1PF to nPF correspond to each lighting load L.
The analog multiplexer circuit 21 is operated by a channel selection signal from the channel selection circuit 1, and provides the outputs of the preset faders 1PF to nPF to the cross calculation circuit 4.

FIG. 3 is an electrical circuit diagram of the crossfader section 3 and arithmetic circuit 4 shown in FIG. 1. Cross feeder section 3 includes master feeder MF and cross feeder
It has CAF and CBF. Crossfader CAF,
The CBF is equipped with a pair of variable resistors, each variable resistor can be operated individually, and these two
When two variable resistors are operated in the same direction, one signal from the two variable resistors increases and the other signal decreases. The cross calculation circuit 4 is
Multiplication operations XA, XB, adder K, and switching circuit
Has SWA and SWB. The switching circuit SWA turns on switches 1A, 2A, and 3A, respectively, according to the scene selection signal, and turns on the preset faders PF1 and PF.
2. Give each output of PF3 to one input terminal of multiplier XA. The other input terminal of multiplier XA is connected to the output terminal of crossfader CAF. The switching circuit SWB switches switch 1 according to the scene selection signal.
Turn on B, 2B, and 3B, respectively, and apply each output of preset faders PF1, PF2, and PF3 to multiplier XB.
to one input terminal of The other input terminal of multiplier XB is connected to the output terminal of crossfader CBF.

A voltage V is applied to the master fader MF, and the output of the master fader MF is the cross fader CAF,
Given to the CBF input terminal. master feder
MF is for raising or lowering the dimming level of the lighting loads L1 to Ln as a whole.

Multiplier XA multiplies the output of crossfader CAF and the output of switching circuit SWA, and multiplier XB multiplies the output of crossfader CBF and the output of switching circuit SWB. Adder K adds the output of multiplier XA and the output of multiplier XB.

Here, switching circuits SWA, SWB, adder XA,
The outputs of XB and adder K are signals representing the ratio of the dimming level, with the minimum value being 0% and the maximum value being 100%. It is a signal that expresses the ratio in a range, and the output of the switching circuit SWA is PA, the output of the switching circuit SWB is PB, the output of the crossfader CAF is CA, and the output of the crossfader CBF is
Let the output of CB be the output of the master feeder MF, and the output of the master feeder MF be M, then the output K1 of the adder is expressed by the following first equation.

K1=(PA×CA+PB×CB)×M (1) The relationship between the output K1 and each output of the crossfader CAF and CBF will be explained with reference to the graph shown in FIG. In this case, the output CA of the crossfader CAF and the output CB of the crossfader CBF are set so that the relationship between CA+CB=100% (2) is maintained.
Operate CBF in the same direction and at the same time. In FIG. 5, line l2 shows PA×CA of the first equation, and line l3 shows PB×CB of the first equation. However, PA=80%...(3) PB=60%...(4), and the output M of the master feeder MF is 100%. The output K1 from the adder K in Fig. 3 under such setting conditions of CA, CB, PA, and PB is:
It becomes as shown by line l1 in FIG.

Figure 4 shows the sample hold/hold ratio in Figure 1.
3 is a detailed block diagram of the drive circuit section 5. FIG. Each lighting load L1-Ln is connected to a sample hold/drive circuit section 51-5n, respectively. Analog multiplexer circuit MP5 is channel selection circuit 1
The sample hold/drive circuits 51 to 5n are selected by the channel selection signal from the adder K to the selected sample hold/drive circuits 51 to 5n.
gives the output from The selected sample hold/drive circuits 51 to 5n are connected to each of the lighting loads L1 to 5n.
Dimming Ln.

For example, the crossfader CAF in Figure 3,
Crossfader CAF due to wrong CBF operation.
Each output CA, CB of CBF may be CA+CB<100%...(5) or CA+CB>100%...(6). Crossfader at this time
The relationship between the output CA of CAF and the output K1 of adder K is shown in FIG. In FIG. 6, the line l6 is the output PA of the switching circuit SWA of FIG. 3, which indicates 80%, and the line l7 is the output PB of the switching circuit SWB, which indicates 60%. Line l4 is when CA+CB>100%...(7), and the output CB of the crossfader CBF
Fixed to 100% and output of crossfader CAF
Output of adder K when CA is operated from 0 to 100%
Indicates K1. Line l5 is the output CB of the crossfader CBF when CA+CB<100%...(8)
is fixed at 0%, and the output CA of the crossfader CAF is
Output K1 of adder K when operated from 0 to 100%
shows. As can be seen from FIG. 6, the adder K
The output K1 level of the crossfader CAF,
Compared to each level of output PA of line l6 and output PB of line l7 under CBF,
It has become less than that. This is the third
When operating the crossfaders CAF and CBF shown in the figure, the preset faders PF1 to PF1 shown in Figure 1 are subordinate to the crossfaders CAF and CBF.
The level set in PF3 and, for example, 60% to 80
Levels other than between % may be sent from adder K. When an output of such a level is sent from the adder K, the dimming level becomes abnormally dark or bright. The crossfader CAF and CBF cannot be used separately because the problem of dimming level drop or jump occurs.

Purpose The purpose of the present invention is to solve the above-mentioned technical problem,
To provide a light control device which eliminates drop in light control level or jump when each cross fader is moved independently of each other.

Means for Solving the Problems The first invention described in claim 1 is a preset fader section provided for each of a plurality of stages, and the preset fader section of each stage is provided with a plurality of preset fader sections. Including a plurality of preset faders 1PF, 2PF, ..., nPF that each derive a signal representing a predetermined dimming level of the lighting loads L1, L2, ..., Ln as a percentage of minimum 0% or more and maximum value 100% or less, Such preset fader sections PF1, PF2, PF3, and the preset fader sections PF1, PF2, PF.
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; a signal representing the ratio CA from the crossfader CAF; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first calculation circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, a symbol representing the dimming level ratio PB from the switching circuit SWB, and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to signals representing PA and PB, when CA+CB>100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. Derive a signal representing the ratio 100-CA from circuit B1. When CA+CB>100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio 100-CB from the second calculation circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB≦100%, the first changeover switch SW1 derives a signal representing the ratio CB from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CB from the crossfader CBF. This is a light control device characterized by controlling the changeover switches SW1 and SW2 in such a manner to derive a signal representing the light intensity.

The second invention described in claim 2 is a preset fader section provided for each of a plurality of stages, and the preset fader section of each stage is provided for a plurality of lighting loads L1, L2, . . . Such a preset fader includes a plurality of preset faders 1PF, 2PF, ..., nPF each deriving a signal representing a predetermined dimming level of Ln as a percentage of a minimum value of 0% or more and a maximum value of 100% or less. parts PF1, PF2, PF3; and the preset fader parts PF1, PF2, PF.
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; a signal representing the ratio CA from the crossfader CAF; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first arithmetic circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, a symbol representing the dimming level ratio PB from the switching circuit SWB, and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to the signals representing PA and PB, when CA+CB<100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio 100−CB from the second arithmetic circuit B2,
The second changeover switch SW2 derives a signal representing the ratio CB from the crossfader CBF. When CA+CB<100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second The changeover switch SW2 derives a signal representing the ratio 100−CA from the first arithmetic circuit B1. When CA+CB≧100%, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second The changeover switch SW2 is a light control device characterized in that it derives a signal representing the ratio CB from the crossfader CBF and controls the changeover switches SW1 and SW2 in this manner.

A third aspect of the present invention as set forth in claim 3 is a preset fader section provided for each of a plurality of stages, and the preset fader section of each stage is provided for a plurality of lighting loads L1, L2, . . . Such a preset fader includes a plurality of preset faders 1PF, 2PF, ..., nPF each deriving a signal representing a predetermined dimming level of Ln as a percentage of a minimum value of 0% or more and a maximum value of 100% or less. parts PE1, PE2, PE3, and the preset fader parts PF1, PF2, PF.
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; a signal representing the ratio CA from the crossfader CAF; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first calculation circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, a symbol representing the dimming level ratio PB from the switching circuit SWB, and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to signals representing PA and PB, when CA+CB≧100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. When CA+CB≧100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio 100−CB from the second arithmetic circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB<100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio 100−CB from the second arithmetic circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB<100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. The light control device is characterized in that it derives a signal representing the ratio 100-CA from the circuit B1 and controls the changeover switches SW1 and SW2 in this manner.

Embodiment FIG. 7 shows an embodiment of the first invention described in claim 1, and a second embodiment of the invention described in claim 2.
FIG. 7 is a block diagram common to an embodiment of the invention and an embodiment of a third invention described in claim 3; However, the overall configuration of this embodiment is the same as that shown in FIG. 1 above. In FIG. 7, components corresponding to those shown in FIG. 3 are given the same reference numerals. A voltage V is applied to the master fader MF, and its output terminal is connected to the input terminals of the cross faders CAF and CBF. The output terminal of the crossfader CAF is connected to the contact a1 of the switch SW1 and the input terminal of the arithmetic circuit B1. The output terminal of the crossfader CBF is connected to the contact b2 of the switch SW2 and the input terminal of the arithmetic circuit B2. The output terminal of the arithmetic circuit B1 is connected to the contact a2 of the switch SW2. Arithmetic circuit B2
The output terminal of is connected to contact b1 of switch SW1. The arithmetic circuits B1 and B2 are configured, for example, as shown in FIG. 7A. In FIG. 7A, when a signal representing a ratio x% is applied to an inverter 71, a signal representing a ratio 100-x is derived from an adder 72.

Returning to Figure 7, contact c1 of switch SW1 is connected to one input terminal of multiplier XA, and switch SW1 is connected to one input terminal of multiplier XA.
Contact c2 of SW2 is connected to one input terminal of multiplier XB. Switch SW1 is switching control circuit A
The switch SW2 is controlled by the switching control circuit A2. Switching circuit SWA,
The SWB has a preset fader PF shown in Figure 1.
The outputs of PF1 to PF3 are respectively given. The output of switching circuit SWA is applied to the other input terminal of multiplier XA. The output of the switching circuit SWB is given to the other input terminal of the multiplier XB. Adder K adds the output of multiplier XA and the output of multiplier XB, and supplies the result to sample hold/drive circuit section 5 shown in FIG. 1 as a drive means. A scene selection signal for selecting a scene is given to the switching circuits SWA and SWB, and each switch 1A, 2A, 3A, 1
B, 2B, and 3B can be switched.

Hereinafter, the operation of the circuit shown in FIG. 7 will be explained regarding the first invention recited in claim 1. Crossfader CAF output to CA, crossfader CBF
Let the output of switch SW1 be S1, and the output of switch SW2 be S2.

When CA+CB>100%...(9), by switching switch SW1 or switch SW2, S1+S2=100%...(10) Controlled by switching control circuits A1 and A2 and multipliers XA and XB so that S1+S2=100%...(10) Outputs S1 and S2 are given respectively. In addition, switching of switches SW1 and SW2 is as follows:
It is controlled by the magnitude of the output PA of the preset faders PF1 to PF3 sent out from the switching circuit SWA of the cross faders CAF and CBF and the output PB of the preset faders PF1 to PF3 sent out from the switching circuit SWB. In other words, when PA≧PB (11), priority is given to output CA, and when PA<PB (12), priority is given to output CB. In other words, when giving priority to output CA, output CB is switched to 100-CA, and when giving priority to output CB, output CA is switched to 100-CB.

For example, set output CB to 50%, master fader
Fix the MF output M to 100% and output
Assume that CA is moved from 0 to 100%. When the output CA of the crossfader CAF is in the range of 0 to 50%, the same output as the conventional one is sent from the adder K. For example, if the outputs CA, CB, PA, and PB are CA=25%...(13) CB=50%...(14) PA=80%...(15) PB=60%...(16) The output K2 of the adder K is K2=80×25+60×50=50(%) (17).

Next, the output CA of crossfader CAF is 50% ~
We will explain the case where it is in the 100% range. For example, if the outputs CA, CB, PA, and PB are CA=75%...(18) CB=50%...(19) PA=80%...(20) PB=60%...(21) Output of adder K in conventional Figure 3
K1 is K1 = 80 x 75 + 60 x 50 = 90 (%) ... (22).

On the other hand, the output K2 of the adder K in FIG. 7 in one embodiment of the first invention is K2=80×75+60×25=75(%) (23). In this way, the output K2 of the adder K in FIG.
By switching the switch SW2 to the arithmetic circuit B1, the following calculation is performed: S2=100−CA (24), which becomes smaller than K1 in the 22nd equation.

Now, referring to the graphs shown in Figures 8 and 9, the following conditions are established: PA≧PB...(25), CA+CB>100%...(26), and CA+CB≦100%...(27) The operation of switching the switches SW1 and SW2 will be explained below.

(b) First control example When PA≧PB and …(28) CA＋CB＞100% …(29), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact a2.

When PA<PB and ...(30) CA+CB>100% ...(31), contact c1 of switch SW1 becomes contact b1,
The contact c2 of the switch SW2 is set to the contact b2.

When PA≧PB and …(32) CA＋CB≦100% …(33), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact b2.

When PA<PB and ...(34) CA+CB≦100% ...(35), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact b2.

By such switching operations of switches SW1 and SW2, the output CA and adder K when fixed at CB = 50% ... (36) PA = 80% ... (37) PB = 60% ... (38) The output of K2
Figure 8 shows the relationship between output CA and output K2 when fixed at CB = 50% ... (39) PA = 60% ... (40) PB = 80% ... (41) is shown in Figure 9. In Figure 8, line l81 shows the level of output K2 of adder K when output CA changes between 0 and 50%, and line l83 shows the output
The level of the output K2 of the adder K is shown when CA changes between 50% and 100%. Line l82 indicated by a broken line is the output K1 of the conventional adder K when the output CA changes between 50% and 100%.
Indicates the level of

Also, in Figure 9, line l91 is the output of adder K when output CA changes between 0 and 50%.
Shows the level of K2, line l93 output CA is 50
Output of adder K when changing between ~100%
Indicates the level of K2. Line l92 also shown as a dashed line
shows the level of the output K1 of the conventional adder K when the output CA changes between 50% and 100%.

Next, regarding the second invention recited in claim 2, the operation of the circuit shown in FIG. 7 will be described.

(b) Second control example When PA≧PB and …(42) CA＋CB＞100% …(43), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact b2.

When PA<PB and...(44) CA+CB>100%...(45), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact b2.

When PA≧PB and …(46) CA+CB≦100% …(47), contact c1 of switch SW1 becomes contact b1,
The contact c2 of the switch SW2 is set to the contact b2.

When PA<PB and...(48) CA+CB≦100%...(49), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact a2.

By such switching operations of switches SW1 and SW2, the output CA and adder K when fixed at CB = 50% ... (50) PA = 80% ... (51) PB = 60% ... (52) The output of K2
Figure 10 shows the relationship between CB = 50% ... (53) PA = 60% ... (54) PB = 80% ... (55) Output CA and output of adder K when fixed at K2
FIG. 11 shows the relationship between

In FIG. 10, line l101 shows the level of output K2 when output CA changes between 0 and 50%, and line l103 shows the level of output K2 when output CA changes between 50% and 100%.
Indicates the level of output K2 when changing between %. Furthermore, a line l102 indicated by a broken line indicates the level of the output K1 of the conventional adder K when the output CA changes between 0 and 50%.

Also, in Figure 11, line l111 is the output
It shows the level of output K2 when CA changes between 0 and 50%, and line l113 shows the level of output K2 when CA changes between 0 and 50%.
Indicates the level of output K2 when changing between %. Furthermore, a line l112 indicated by a broken line indicates the level of the output K1 of the conventional adder K when the output CA changes between 0 and 50%.

Furthermore, regarding the third invention recited in claim 3, the operation of the circuit shown in FIG. 7 will be explained.

(c) Third control example When PA≧PB and …(56) CA＋CB＞100% …(57), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact a2.

When PA<PB and...(58) CA+CB>100%...(59), contact c1 of switch SW1 becomes contact b1,
The contact c2 of the switch SW2 is set to the contact a2.

When PA≧PB and …(60) CA+CB≦100% …(61), contact c1 of switch SW1 becomes contact b1,
The contact c2 of the switch SW2 is set to the contact a2.

When PA<PB and ...(62) CA+CB≦100% ...(63), contact c1 of switch SW1 becomes contact a1,
The contact c2 of the switch SW2 is set to the contact a2.

By such switching operations of switches SW1 and SW2, the output CA and adder K when fixed at CB = 50% ... (64) PA = 80% ... (65) PB = 60% ... (66) The output of K2
Figure 12 shows the relationship between output CA and output K2 when fixed at CB = 50% ... (67) PA = 60% ... (68) PB = 80% ... (69) is shown in FIG.

In FIG. 12, line l121 shows the level of output K2 when output CA changes between 0 and 50%, and line l123 shows the level of output K2 when output CA changes between 50 and 100%.
Indicates the level of output K2 when changing between .
In addition, the line l122 shown as a broken line has an output CA of 0 to
It shows the level of the output K1 of the conventional adder K when it changes between 100%.

Also, in Figure 13, line l131 is the output
Output K2 when CA changes between 0 and 100%
The dashed line l132 indicates the output level.
The level of the output K1 of the conventional adder K is shown when CA changes between 0 and 100%.

In addition, in this embodiment, the preset fader is set to 3.
Although the number of stages is used, the number of stages is not limited to three and may be any other number of stages.

Effects According to the first invention described in claim 1, when the ratios CA and CB become CA+CB>100% while operating the cross faders CAF and CBF, the dimming level ratios PA and PB are When PA≧PB, CB is switched to 100-CA, and when PA<PB, CA is switched to 100-CB for crossfade control, so the dimming level is set to PA.
It will not grow beyond the range set by and PB.

Therefore, even if the cross faders CAF and CBF are operated independently, each lighting load L1, L2,
..., there is no jump in the dimming level where the dimming level of Ln becomes abnormally bright, and the technical problems with conventional dimming devices have been solved, and the crossfader CAF,
Free dimming operation using CBF is possible.

According to the second invention described in claim 2, when the ratios CA and CB become CA+CB<100% while operating the cross faders CAF and CBF, the dimming level ratios PA and PB become PA≧ When PB, CA is switched to 100-CA, and when PA<PB, CB is switched to 100-CA for crossfade control, so the dimming level is PA
It does not become smaller than the range set by and PB.

Therefore, even if the cross faders CAF and CBF are operated independently, each lighting load L1, L2,
..., there is no dip in the dimming level where the dimming level of Ln becomes abnormally dark, and the technical issues with conventional dimming devices have been solved, and the crossfader CAF,
Free dimming operation using CBF is possible.

According to the third invention described in claim 3, when the ratios CA and CB become CA+CB≧100% while operating the cross faders CAF and CBF, the dimming level proportions PA and PB become PA≧ When PB, switch CB to 100-CA, and when PA < PB, switch CA to 100-CB for crossfade control. If the ratio CA, CB becomes CA + CB < 100%, the dimming level ratio PA and When PB is PA≧PB, CA is switched to 100-CB, and when PA<PB, CB is switched to 100-CA for crossfade control, so the dimming level is PA
Do not exceed the range set by and PB.

Therefore, even if the cross faders CAF and CBF are operated independently, each lighting load L1, L2,
..., there is no dip in the dimming level that makes the Ln dimming level abnormally dark, and there is no jump in the dimming level that becomes bright, and the technical problems with conventional dimming devices have been solved, and it is possible to freely use crossfader CAF and CBF. Dimming operation is possible.

In particular, in stage lighting, when there is a cross change between scenes, the cross faders CAF and CBF are fixed together and do not move relative to each other, and even if they are moved with some deviation, the preset fader does not want to change the level due to the scene change. The output will remain at the same level and will not become brighter. In addition, the output of the preset fader whose level you want to change slightly is controlled between the output levels of the preset fader within the transition scene, and the lighting load may become abnormally dark or bright during the cross transition. This eliminates the need for light control, making it easier to perform dimming operations.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the entire conventional dimming device, Fig. 2 is an electric circuit diagram of the preset fader sections PF1 to PF3 shown in Fig. 1, and Fig. 3 is the cross fader section shown in Fig. 1. 3 and the electric circuit diagram of the cross operation circuit 4, FIG. 4 is a detailed block diagram of the sample hold/drive circuit section shown in FIG. 1, and FIG.
6 and 6 are graphs for explaining the operation of a conventional light control device, FIG. 7 is an electric circuit diagram common to each of the embodiments of the first, second, and third inventions, and FIG. 7A is the arithmetic circuit B shown in FIG.
1, B2 circuit diagram, FIGS. 8 and 9 are graphs for explaining the operation of the first invention, FIGS. 10 and 11 are graphs for explaining the operation of the embodiment of the second invention, FIGS. 12 and 13 are graphs for explaining the operation of the embodiment of the third invention. CAF, CBF...Cross fader, A1, A2
...Switching control circuit, B1, B2...Arithmetic circuit,
SW1, SW2...changeover switch, PF1 to PF3
...Preset fader section, SWA, SWB ... switching circuit, XA, XB ... multiplier, K ... adder,
5...Sample hold/drive circuit, L1 to Ln
...Lighting load.

Claims (1)

[Scope of Claims] 1. A preset fader section provided for each of a plurality of stages, wherein the preset fader section of each stage adjusts the predetermined dimming level of a plurality of lighting loads L1, L2, ..., Ln. Such preset fader sections PF1, PF2, including a plurality of preset faders 1PF, 2PF, ..., nPF each derive a signal representing a minimum value of 0% or more and a maximum value of 100% or less.
PF3 and the preset fader sections PF1, PF2, PF
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first calculation circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, a symbol representing the dimming level ratio PB from the switching circuit SWB, and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to signals representing PA and PB, when CA+CB>100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. Derive a signal representing the ratio 100-CA from circuit B1. When CA+CB>100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio 100-CB from the second calculation circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB≦100%, the first changeover switch SW1 derives a signal representing the ratio CB from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CB from the crossfader CBF. A light control device characterized in that the changeover switches SW1 and SW2 are controlled in such a manner to derive a signal representing the light intensity. 2. A preset fader section provided for each of a plurality of stages, and the preset fader section of each stage adjusts the predetermined dimming level of the plurality of lighting loads L1, L2, ..., Ln to a minimum value of 0%. Such preset fader sections PF1, PF2, including a plurality of preset faders 1PF, 2PF, ..., nPF each deriving a signal expressed at a ratio of 100% or more of the maximum value, respectively.
PF3 and the preset fader sections PF1, PF2, PF
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; a signal representing the ratio CA from the crossfader CAF; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first calculation circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, and responds to a signal representing the dimming level ratio PB from the switching circuit SWB and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to the signals representing PA and PB, when CA+CB<100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio 100−CB from the second arithmetic circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB<100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. When CA+CB≧100%, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CBF. A light control device characterized in that the changeover switches SW1 and SW2 are controlled in such a manner so as to derive a signal representing a ratio CB of . 3 A preset fader section provided for each of a plurality of stages, and the preset fader section of each stage adjusts the predetermined dimming level of the plurality of lighting loads L1, L2, ..., Ln to a minimum value of 0%. Such preset fader sections PF1, PF2, including a plurality of preset faders 1PF, 2PF, ..., nPF each deriving a signal expressed at a ratio of 100% or more of the maximum value, respectively.
PF3 and the preset fader sections PF1, PF2, PF
It is equipped with switching circuits SWA and SWB that select the outputs of each stage of 3 in pairs and derive them as signals representing the dimming level proportions PA and PB, and a pair of variable resistors. can be operated individually, and when these two variable resistors are operated in the same direction, one of the signals from the variable resistors is derived to increase and the other signal to decrease. cross fader
CAF, CBF, each of these signals is 0%
These represent the ratios CA and CB of 100% or less, and when two variable resistors are operated in the same direction and at the same time, such a crossfader CAF, CBF where CA + CB = 100%.
and a first arithmetic circuit B1 which responds to a signal representing the ratio CA from the crossfader CAF, calculates the ratio BC1, BC1=100−CA, and derives the calculation result BC1, and which represents the ratio CB from the crossfader CBF. A second arithmetic circuit B2 that responds to the signal, calculates the ratio BC2, BC2 = 100-CB, and derives the calculation result BC2; a signal representing the ratio CA from the crossfader CAF; The first changeover switch SW1 switches between the signal representing the ratio BC2 and the signal representing the ratio S1, and the signal representing the ratio CB from the crossfader CBF and the signal representing the ratio BC1 from the first calculation circuit B1. , a second changeover switch SW2 that derives a signal representing the ratio S2, and changeover control circuits A1 and A that control the switching in the changeover switches SW1 and SW2, respectively.
2, and in response to a signal representing the dimming level ratio PA from the switching circuit SWA and a signal representing the ratio S1 from the first changeover switch SW1, the dimming level ratio PXA, PXA=PA×S1 is determined. A first multiplier XA calculates and derives a calculation result PXA, and responds to a signal representing the dimming level ratio PB from the switching circuit SWB and a signal representing the ratio S2 from the second changeover switch SW2. , a second multiplier XB that calculates the dimming level ratio PXB, PXB=PB×S2 and derives the calculation result PXB, and the dimming level ratio from the multipliers XA and XB.
In response to the signals representing PXA and PXB, an adder K calculates the dimming level ratio K2, K2=PXA+PXB, and derives the calculation result K2, and a signal representing the dimming level ratio K2 from the adder K. In response, each lighting load L1, L2,...,Ln
The switching control circuits A1 and A2 include a driving means 5 for driving the dimming so that the dimming level corresponds to K2.
Signals representing ratios CA and CB from CAF and CBF,
Percentage of dimming level from switching circuits SWA and SWB
In response to signals representing PA and PB, when CA+CB≧100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. Derive a signal representing the ratio 100-CA from circuit B1. When CA+CB≧100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio 100-CB from the second calculation circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB<100% and PA≧PB, the first changeover switch SW1 derives a signal representing the ratio 100−CB from the second arithmetic circuit B2,
The second changeover switch SW2 is the crossfader CBF
When CA+CB<100% and PA<PB, the first changeover switch SW1 derives a signal representing the ratio CA from the crossfader CAF, and the second changeover switch SW2 derives a signal representing the ratio CA from the crossfader CAF. A dimmer device characterized in that it derives a signal representative of the ratio 100-CA from the circuit B1 and controls the changeover switches SW1, SW2 in such a manner.