JPS5855638B2 - Shoumeiseigyosouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting control device used, for example, on a stage or in a studio, and more particularly to a lighting control device that can selectively obtain desired dimming characteristics.

In general, the dimming characteristics of dimming devices used in theaters, television studios, etc., that is, the relationship between the fader scale and the dimming intensity (brightness), is almost always an approximate square characteristic (Munsell curve) shown by the solid line in Figure 1. be.

In terms of visibility, this approximate square characteristic becomes a straight line as shown by the dotted line in the figure, and when the degree of dimming is visible to the human eye or when performing a dimming operation, it is necessary to use appropriate dimming. It is said to be a characteristic.

However, it is considered inappropriate to perform the crossover using colored lights such as red and blue in horizontal lighting on stages and studios.

Further, in an image captured by a television camera, it is not appropriate to fade in or fade out the illumination due to the difference in camera sensitivity and visibility.

Conventionally, as a means of solving this kind of problem, for example, in the preset method using faders, each channel is sent to each dimming control signal input terminal of the preset fader in each dimming system (channel) of a plurality of lighting lamps and dimming units. A changeover switch is provided, and the changeover switch allows switching to a plurality of types of cross faders having different dimming characteristics (scale vs. dimming control signal) to obtain desired dimming characteristics.

Note that the same applies to a light control device having a memory.

As described above, in the conventional device, it is necessary to manually switch the dimming characteristics each time while performing predetermined lighting control for each scene, which is inconvenient in terms of operation.

An object of the present invention is to provide a lighting control device that can automatically switch control characteristics to desired ones stored in a memory in advance in accordance with lighting conditions.

Hereinafter, details of the present invention will be clarified by examples shown in the drawings.

FIG. 2 shows one embodiment of the present invention, and FIG. 3 is a partially detailed view of FIG.

First, the case of writing scene data will be explained.

The level of the dimming control signal is set on the faders F1 to Fn of each channel.

The dimming control signal of each channel of F1 to Fn is scanned by an analog multiplexer MRI, and is scanned by an AD converter AD.
bit) b.

-b, is converted into a time-division digital dimming control signal.

The digital dimming and light control signal becomes a serial dimming control signal in units of the dimming control signal.

In this case, the switch S in the figure is set to the on state, and the AD
Output (digital dimming control signal) register REG (A)
loaded into.

REG (4) holds dimming control signals (scene data) for all channels.

The scene data of REG(A) is applied to the digital-to-analog converter DA(A) by the digital multiplexer MR(4) for each dimming control signal, and is converted into a time-division serial analog dimming control signal.

This serial dimming control signal is sent to FG(A), which includes a plurality of linear approximation function generators and a switching section.

Details of FG (4) and FG (B) and their surroundings are shown in FIG.

F gOs F g 1 s F g□ is, for example, the fourth
With three types of broken line approximation function generators as shown in Figures a and b, the output of DA(4) is F g Q s F g 1 y
It is input to F2.

The cutting edge of F g Q s F g 1 y F g □ and the output of DA (4) (output that does not go through the broken line approximation function generator) are analog switches AS1-A.

It is input to the adder AAD through As2-A, As3-A, and As4-A.

Each analog switch above has an analog switch selection signal,
In other words, the binary codes b, jb, and are switched via the decoder DEC(A).

The same applies to FG(2).

Returning to Fig. 2, these switching codes b, , b are specified by the dimming characteristic specifying section FSW provided corresponding to each channel (select a broken line approximation function generator).
Similarly to the dimming control signal, it is scanned by multiplexer MR2 in synchronization with MHI and held in register REG(a).

Then, it is scanned again by the multiplexer MR (a),
The signal is given to the decoder DEC(A) in a time-divisional manner.

That is, a polygonal approximation function generator is selected for each series dimming control signal.

In other words, the linear approximation function generator is switched and selected in time-division winter time for the time-division series dimming control signal.

As a result, the dimming characteristics of each channel are specified.

The output of the adder AAD is synchronized with the multiplexers MRI and MR(A) by the demultiplexer DMR, and distributed and held to predetermined analog hold circuits AHR1 to n of the analog hold circuit group AHR corresponding to the number of channels, and is used for dimming control. A signal is output.

At this time, CF (4) is set to 100 units using a changeover switch.

The dimming control signal of F is held in AHRl of the first channel of AHH, and the dimming control signal of Fn is held in AHRn of nth channel of AHR.

In this state, the address number (scene number) entered from the controller CNT to the memory controller ME-C
And when a write command is issued, each channel's dimming control signal (
scene data) and a dimming custom designation signal (analog switch selection signal) are stored in the memory ME.

In this way, the required number of scene data and the switching selection signal added thereto are stored.

Next, a case will be described in which a plurality of written scene data and switching selection signals are read out and an illumination scene is reproduced.

First, switch S is opened.

Here, the specification of the address (scene number) of the scene data from the controller CNT, the read command, the desired scene data, and the switching selection signal are optionally sent to the register R.
EG (A) and RE c, (a) or RFC (B) and RE G (b).

Both read data are sent to the multiplexer MR (a)
Or MR song.

Scanned by MR (b) and time-divisionally input to DA converter DA (A) and decoder DEC (A) or DA song, DEC ■, each dimming control signal is stored in advance and read out at the same time by a switching selection signal. , the dimming control signal is selectively converted into a function through a polygonal approximation function generator, and outputted as DMR→AHR via an adder and AAD.

In the figure, CF (4), (to the east are joining faders that control the multiplication output of DA (4), DA (Bl).

For example, CF (At scale "100" (control signal 100%), CF (Bl scale "0" (control signal 0%)
), the scene data held in REG(4) is output at xoo%, and conversely, CF(4)="0"CF■
= In "i o o", the scene data of REG■ is 10
It is set to be output at 0%.

Then, simultaneous cross operation of crossfaders CF(A)CF■ (CF'(A) "100" → "O", CF(2)
is to change by the same value from “0” to “100”),
The scene data of REG (4) and the scene data of REG (B) are rotated again.

FIG. 5 shows another embodiment, and FIG. 6 is a partially detailed view thereof.

In this example, nonlinear DA converters DA(AI) and DA(A2L DA(A
3) and DA (Bl).

DA(B2) and DA(B3) are provided, and each dimming control signal (scene data) held in REG(4) or REG(B) is transmitted to DA(AI), DA(A2L DA(A3)
Or DA(BIL DA(B2), DA(B3) M
In addition to introducing the output of R(A) or MR(Bl, a switching section AS(A)', AS(
Bl' is provided, and as described above, it is opened and closed in a time-divisional manner using a switching selection signal to obtain different dimming characteristics.

FIG. 7 shows yet another embodiment.

In the first and second embodiments described above, a switching section and a nonlinear element are provided in a time-division series dimming control signal circuit, and the switching section switches in accordance with the time-division timing to send a dimming control signal to the nonlinear element. However, in this embodiment, a nonlinear element (F is inserted, and the switching parts Ask) and AS(B
) is an example of selectively switching to obtain different dimming characteristics.

Note that the invention is not limited to the above embodiments.

That is, although the above-mentioned embodiment illustrated the case where the present invention is applied to a dimming control device, the present invention is not limited to this, and the vertical position of the lighting equipment,
It can also be applied to control the lighting equipment itself, such as the rotation angle, as needed.

Of course, various modifications can be made without changing the gist of this invention.

As explained above, the present invention includes a load (such as a lamp or a light fixture), a controller that controls the load (a dimming unit, a single drive motor, etc.), and a controller that supplies a variable control signal to the controller. A signal generator (faders, etc.), a plurality of function signal generators (linear approximation function generator, nonlinear DA converter, etc.) each corresponding to multiple types of control characteristics (for example, dimming characteristics), and the above control signal generator. a storage device that stores the control signal of the function signal generator and sequentially stores which of the function signal generators to use according to a change in the scene; The lighting control device reads out a control signal, selects a specific function signal generator, and supplies the control signal read out through the signal generator to the controller.

Therefore, according to the present invention, it is possible to automatically switch control characteristics to desired ones stored in memory in advance according to lighting conditions, so that, unlike conventional devices, for example, predetermined lighting control can be performed for each scene. There is no need to manually switch the dimming characteristics etc. each time the lighting control is performed, and it is possible to provide a lighting control device that has effects such as being extremely easy to operate, simple in configuration, and inexpensive. .

[Brief explanation of the drawing]

FIG. 1 is a curve diagram showing the relationship between the Feta scale and the dimming level shown for detailed explanation of the present invention, FIG. 2 is a block diagram showing the configuration of one embodiment of the present invention, and FIG. 4 at b is a diagram showing an example of the broken line approximation function generator of the same embodiment, FIG. 5 is a block diagram showing the configuration of another embodiment of the present invention, and FIG. Partial detail of Figure 5, No. 7
The figure is a block diagram showing the configuration of yet another embodiment of the present invention.

Claims (1)

[Claims] 1 a load, a controller that controls the load, a control signal generator that supplies variable control signals to the controller, a plurality of function signal generators each corresponding to a plurality of types of control characteristics, and the control signal a storage device that stores control signals of the generator and sequentially stores which of the functional signal generators to use according to changes in the scene; The lighting control is characterized in that the control signal is read out through the signal generator, the specific function signal generator is selected, and the control signal read out through the signal generator is supplied to the controller. Device.