JPH04324284A - Memory dimmer - Google Patents

Abstract

PURPOSE:To decrease a time error when dimming control of a plurality of scenes is repeatedly performed. CONSTITUTION:Data A1,..., An of illumination levels for representing brightness of an illuminating lamp 11 are stored in a scene data memory 12. Fading times T11,..., Tn1 and holding times T12,..., Tn2 are set in a time data memory 13. A total sum of the fading and duration times is preset to a time control circuit 18. A control circuit 14 reads a memory content of the scene data memory 12 and the time data memory 13 given to an arithmetic circuit 15 to control the illuminating lamp 11 dimmed. The time control circuit 18 counts down a clock signal from a clock circuit 16 to give an interruption signal to a CPU 41 when a count value becomes 0. In the CPU 41, dimming control from the first scene is repeated in response to the interruption signal.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a device for controlling the brightness of lighting on a stage or the like, and more particularly to a storage dimming device that repeatedly reproduces preset lighting brightness for multiple scenes for each scene. .

0002

2. Description of the Related Art FIG. 7 is a block diagram showing the configuration of a conventional storage dimming device. Brightness data A of lighting lamp 1
1, A2, ..., An are stored in the scene data memory 2 in advance.
is set to The brightness of lighting lamp 1 is determined by each data A1, A
2, ..., An fade time T11, T
21,...,Tn1 is the duration T in each scene
12, T22, . . . , Tn2 are preset in the time data memory 3. The contents stored in the scene data memory 2 and the time data memory 3 are sequentially read out by the control circuit 4 and are calculated by the calculation circuit 5. The arithmetic circuit 5 performs a fade operation on the brightness of the illumination lamp 1 according to the clock signal from the clock circuit 6 so that it becomes the brightness of the next scene. The calculation result in the calculation circuit 5 is given to the dimmer 7. The dimmer 7 drives the illumination lamp 1 to achieve the brightness given by the arithmetic circuit 5.

FIG. 8 is a flow chart for explaining the operation of the control circuit 4 shown in FIG. In step a1, in the current scene buffer provided in the arithmetic circuit 5,
Set new current scene data from the scene data memory 2. Next, in step a2, new next scene data is read from the scene data memory 2 and set in the next scene buffer of the arithmetic circuit 5. Next, in step a3, the calculation circuit 5 calculates the fade time between the current scene and the next scene and the duration of the next scene from the time data memory 3.
time into the data buffer. In this way, preparations for the calculation circuit 5 to perform calculations for fade control are completed.

Next, in step a4, it is determined whether or not a termination signal has been received from the arithmetic circuit 5. The end signal is generated when the fade control from the current scene to the next scene ends and the duration time has elapsed. In step a4, the process waits until the end signal arrives, and when the end signal comes, the operation from step a1 is repeated again.

According to the storage dimming device as shown in FIG.
Light control as shown in FIG. 9 can be performed automatically. After the control circuit 4 reads out the memory contents An;Tn1, Tn2 corresponding to the last scene from the scene data memory 12 and the time data memory 13 and performs dimming control,
Memory contents corresponding to the first scene A1; T11, T12
is read out, and the dimming control is performed repeatedly from the first scene.

The arithmetic circuit 5 shown in FIG.
The illumination level is calculated as shown in FIG. 9 while counting the clock signals from the controller. In the process of this calculation, a slight error occurs in the elapsed time. In the process of controlling dimming for all scenes, the error time accumulates and increases. As a result, this means that, for example, when lighting and music are initially started at the same time and produced, as the scene progresses, the difference between the changes in the music and the lighting becomes larger. When a performance is repeated many times, the timing of the lighting and music may not match at all due to discrepancies.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a storage dimming device that can reduce time errors even when dimming control is performed repeatedly.

[0008]

[Means for Solving the Problems] The present invention provides a lighting load;
A memory that stores data for multiple scenes representing the brightness of the lighting load, the fade control time for transitioning between each scene, and the duration of each scene, and from the first scene to the last scene in a predetermined order. , reads the stored contents including the data representing the brightness of each scene, the fade time and the duration from the memory, controls the dimming so that the lighting load shifts to the brightness according to the data according to the fade time, and after the fade time has elapsed, the above-mentioned The lighting load is dimmed and controlled at a brightness according to the data for the duration, and after the duration elapses, the stored contents for the next scene are read from the memory and dimmed, and after the dimming control for the last scene is completed. A dimming control means repeats the dimming control from the first scene, and measures the elapsed time of the dimming control from the start of the dimming control for the first scene, and the elapsed time is stored in the memory from the first scene. and a time management means for controlling the dimming control means to start dimming control from the first scene when the sum of the fade time and duration up to the last scene is reached. It is a device.

[0009]

According to the present invention, the memory stores data for a plurality of scenes representing the brightness of the lighting load, the fade time for transition between each scene, and the duration for each scene. The dimming control means reads the stored contents from the memory from the first scene to the last scene in a predetermined order and controls the brightness of the lighting load. After completing the dimming control up to the last scene, the dimming control means repeats the dimming control from the first scene. The time management means measures the elapsed time of the dimming control from the start of the dimming control for the first scene. When the elapsed time reaches the sum of the fade time and the duration time, the time management means controls the dimming control means to start dimming control from the first scene. In this way, even if the dimming control is repeated for each scene, it is possible to prevent the time error from increasing.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention. Data A1 representing the illumination level, which is the brightness of the illumination light 11 such as an incandescent lamp, which is the illumination load;
A2, A3, . . . , An are set in advance in the scene data memory 12 for a plurality of scenes. Time data memory 1
3 includes, for each scene, fade times T11, T21, T31, ..., Tn1 for transitioning to each scene, and a duration T12 for continuing each scene after the end of fade control.
T22, T32, . . . , Tn2 are set in advance. The stored contents of the scene data memory 12 and the time data memory 13 are read out for each scene by the control circuit 14.
The signal is applied to the arithmetic circuit 15. The arithmetic circuit 15 calculates the illumination level of the illumination lamp 11 over time according to the clock signal from the clock circuit 16, and provides it to the dimmer 17. The dimmer 17 drives the illumination lamp 11 while performing phase control to control brightness. The time management circuit 18 has fade times T11 and T2 set in the time data memory 13.
1, T31,..., Tn1 and duration T12, T2
2, T32, . . . , Tn2 and the elapsed time from the start of dimming control for the first scene, and when the elapsed time reaches the total time, a control circuit signal is given.

The control circuit 14 includes a central processing unit (hereinafter abbreviated as "CPU") 41 implemented by a microcomputer or the like, and a program memory 42 in which programs for the operation of the CPU 41 are stored. A signal from the time management circuit 18 is given to the CPU 41 as an interrupt signal.

The arithmetic circuit 15 includes a CPU 51 implemented by a microcomputer or the like, and a memory 52 in which programs for the operation of the CPU 51 are stored and a work area and the like are provided. The arithmetic circuit 15 further includes a digital/analog conversion circuit (hereinafter referred to as "D/A").
) 53, a current scene buffer 54, a next scene buffer 55, a time data buffer 56, an interface circuit (hereinafter abbreviated as "I/O") 57, and a counter 58.

FIG. 2 is a block diagram showing the configuration of the time management circuit 18. The time management circuit 18 includes a presettable down counter 61. CPU shown in Figure 1
41 reads the stored contents of the time data memory 13 and calculates the fade times T11, T21, T31,..., Tn1 and the duration T12, T22, T32,..., Tn2.
The total sum is calculated and preset in the down counter 61 as preset data. The down counter 61 counts down the clock signal from the clock circuit 6, and when the count value reaches 0, outputs an interrupt signal to the CPU 41 of the control circuit 15.

The operation of the control circuit 14 is performed as shown in FIG. Start from step b1, step b2
In the step, the stored time data up to the last scene is read out from the time data memory 13 and added. Next, in step b3, the added time data is preset into the time management circuit 18.

Next, in step b4, the arithmetic circuit 15
The new current scene data is read from the scene data memory 12 and set in the current scene buffer 54 of When starting dimming control from the first scene, a dark state is set in which all illumination levels are 0. For intermediate scenes, the data for the scene that was previously subject to dimming control as the next scene is set. Next, in step b5, data for the scene next to the current scene is read from the scene data memory 12 and set in the next scene buffer 55 of the arithmetic circuit 15. In step b4, as the current scene,
When the data for the last scene is set, a blackout scene is set as the next scene. When transitioning directly from the final scene to the first scene without going through a blackout scene,
Of course, it is sufficient to set the data of the first scene as the next scene. Next, in step b6, the fade time to the next scene is read from the time data memory 13 and set in the time data buffer 56 of the arithmetic circuit 15.

The arithmetic circuit 15 includes a current scene buffer 54,
Based on the data set in the next scene buffer 55 and the time data buffer 56, a fade operation expressed by the following equation 1 is performed, and a signal representing the illumination level is derived from the D/A 53 as the result of the operation.

[0017]

[Equation 1] Y=(A2-A1)X/T1+A1 Here, Y
is the illumination level, A1 is the content stored in the current scene buffer 54, A2 is the content stored in the next scene buffer 55, X is the count value of the counter 58, and T1 is the time data buffer 56.
represents the store contents.

The operation of the arithmetic circuit 15 is performed according to FIG. In step c1, the control circuit 14 waits for new data to be set in the current scene, next scene, and time data buffer. When new data is set, the process moves to step c2 and the count value X of the counter 58 is read. Next, in step c3, the output value Y is calculated according to the above equation 1 and derived from the D/A 53. Next, in step c4, it is determined whether the output value Y has reached the level of A2, which is the content stored in the next scene buffer. If this level has not been reached, the operations from step c2 onwards are repeated.

At step c4, when it is determined that the output value Y has reached the stored content A2 of the next scene buffer 55, the counter 58 is reset to count the duration T2. Next, in step c5, the counter value
I Read. Next, in step c6, it is determined whether the counter value X, which is the elapsed time, has reached the duration T2. Steps c5 and c6 are repeated until the duration T2 is reached. When the elapsed time X reaches the duration T2, the operations from step c1 onwards are repeated again.

By the operation shown in FIG. 4, as shown in FIG. 5, from the current scene, Scene 1, to the next scene, Scene 2, the illumination level changes from A1 to A2 with a fade time of T1, and a duration of T2. Control is performed to maintain the state of illumination level A2.

However, in the operation of the arithmetic circuit 15 as shown in FIG. 4, after the end of the fade time T1, it is determined in step c4 whether the output value Y reaches the illumination level A2 of the scene 2. . Therefore, errors may occur in time due to rounding errors associated with digital calculation processing. On the other hand, if the elapse of the fade time T1 is determined by the count value X of the counter 58, there is a possibility that the illumination level will be different from A2.

In this embodiment, the time management circuit 18 performs interrupt operations as shown in steps b8 to b11 in FIG. 3 to prevent accumulation of time errors. That is, in step b8, an interrupt signal is generated from the time management circuit 18. In step b9, the CPU 41 forcibly sets the current scene buffer to 00 (dark scene), the next scene buffer to the first scene, and the time data buffer to the fade time data of the first scene. This completes the preparation for performing dimming control from the first scene. Next, in step b10 and step b11, the same processing as in step b2 and step b3 is performed, and the repeating operation from step b4 is performed again.

FIG. 6 shows a state in which an error time occurs when dimming control is performed from scene 1 to scene n. According to this embodiment, even if such error time accumulates, it can be resolved when returning from the last scene to the first scene.

[0024]

[Effects of the Invention] As described above, according to the present invention, even if the dimming control is repeated for a plurality of scenes, the dimming control can be performed so that the sum of the fade time and duration becomes the preset time. Can be done. Thereby, even if dimming control is performed repeatedly, time errors can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the time management circuit 18 shown in FIG. 1;

FIG. 3 is a flowchart showing the operation of the control circuit 14 shown in FIG. 1;

FIG. 4 is a flowchart showing the operation of the arithmetic circuit 15 shown in FIG. 1;

FIG. 5 is a graph showing the state of dimming control by the arithmetic circuit 15 shown in FIG. 1;

FIG. 6 is a graph for explaining dimming control according to the embodiment shown in FIG. 1;

FIG. 7 is a block diagram showing the electrical configuration of a conventional storage dimming device.

8 is a flowchart showing the operation of the control circuit 4 shown in FIG. 7. FIG.

FIG. 9 is a graph showing the operation of the storage dimming device shown in FIG. 7;

[Explanation of symbols]

11　Lighting light 12 Scene data memory 13 Time data memory 14 Control circuit 15 Arithmetic circuit 16 Clock circuit 17 Dimmer 18 Time management circuit 41,51 CPU 54 Current scene buffer 55 Next scene buffer 56 Time data buffer 58 Counter 61 Down counter

Claims (1)

[Claims] 1. A memory for storing a lighting load, data for a plurality of scenes representing the brightness of the lighting load, a fade control time for transitioning between each scene, and a duration for each scene, and a predetermined order. reads out the stored contents, including data representing the brightness of each scene, fade time and duration, from the memory from the first scene to the last scene, and adjusts the light so that the lighting load shifts to the brightness according to the data according to the fade time. After the fade time has elapsed, the lighting load is dimmed at a brightness according to the data for the duration time, and after the duration time has elapsed, the stored content for the next scene is read from the memory and dimmed, and the last scene is After the dimming control is completed, the dimming control means repeats the dimming control from the first scene, and it measures the elapsed time of the dimming control from the start of the dimming control for the first scene, and stores the elapsed time in a memory. and a time management means for controlling the dimming control means to start dimming control from the first scene when the sum of the fade time and duration from the first scene to the last scene stored in the display is reached. A storage dimming device comprising: