JPH0576156B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to an improvement in a light control device that temporally changes the color of composite light by supplying a light control signal of a predetermined pattern to illumination systems of different colored lights. [Background Art] A light control device is already known in which a light control signal of a predetermined pattern is supplied to illumination systems of different colored lights to temporally change the color of composite light. For example, the color of the composite light can be changed over time by supplying a dimming signal with a pattern as shown in FIG. There is something that makes me In such a device, at time t=t1, the dimming signal supplied to lighting system 1 is at 0 level, the dimming signal supplied to lighting system 2 is at full level, and at time t=t2, the lighting system The dimming signal supplied to the lighting system 1 is at full level, and the dimming signal supplied to the lighting system 2 is at 0 level. However, with such conventional dimmer devices, it is not possible to individually set the phase difference of the dimmer signals supplied to each lighting system, so the color change between times t1 and t2 and t2 and t3 is Even a preset phase difference is determined, and it is impossible to arbitrarily change the pattern of temporal change in the color of the composite light to meet requirements. [Object of the Invention] The present invention provides a light control device that can set an arbitrary phase difference between light control signals supplied to each of two or more lighting systems, each of which emits different colored light. The purpose of this system is to temporally change the color change pattern of the combined light from two or more lighting systems to realize lighting with high performance effects. [Disclosure of the Invention] The configuration of the present invention will be described below. FIG. 1 is a system diagram showing the configuration of the present invention.
As shown in the figure, the present invention is configured by combining a dimming signal generating section, a timing signal generating section, a phase difference setting section, and lighting load driving means for controlling the output level of each lighting system load. Here, the dimming signal generation section generates a dimming signal with a cycle T for each lighting system, for example, and the timing signal generating section generates a dimming signal with a cycle T of the dimming signal.
Generates timing signals within. In addition, the phase difference setting section changes the lighting state by setting the phase difference 1 to n of the dimming signals supplied to each lighting system, and changes the phase difference between the signals supplied to each lighting system from the start of the circuit. The phase difference between the timing signals is set to define the point in time when the timing signal is generated. The last lighting load driving means supplies a dimming signal to the lighting loads of each lighting system to drive them, and is comprised of a control rectifying element such as a thyristor. In the present invention, it is possible to generate a dimming signal having a pattern as shown in FIGS. 2a to 2c, and the phase difference of such a dimming signal can be arbitrarily set for each lighting system. Next, preferred embodiments of the present invention will be described. FIG. 3 shows the main structure of the first embodiment of the present invention. There are two lighting systems, 1 and 2, and each lighting system has counters 1, 2, and 2.
ROMs 1 and 2, D/A converters 1 and 2, and sample and hold circuits SH1 and SH2 are provided. The pattern of the dimming signal supplied to each lighting system is the same (for example, the pattern shown in Figure 4a), and the pattern information of the dimming signal is stored in ROM1,
It is stored in 2. Counters 1 and 2 provided for each lighting system 1 and 2 are preset pull-ring counters that operate synchronously by receiving clock pulses from the same clock generator OSC.
Specify the address of ROM1, 2 and read the information at the specified address. The information (digital information) stored at the specified address in ROMA 1 and 2 is converted into an analog signal via D/A conversion circuits 1 and 2, respectively, and then sent to the sample and hold circuit.
A dimming signal is electroded from SH1 and SH2, and is supplied to a lighting load control means (not shown). The patterns shown in FIGS. 2a to 2c are appropriately adopted as the dimming signals supplied to the lighting load control means, and such patterns of dimming signals are stored in the ROMs 1 and 2. . In addition, counters 1 and 2 both have their initial values set by preset switches.
It has a configuration that can be set by SW1 and SW2.
With this setting, the phase difference of the dimming signal can be arbitrarily set for each lighting load by specifying the address at which reading of the ROMs 1 and 2 is started. FIG. 4b shows an example of a dimming signal pattern supplied to each of the lighting systems 1 and 2 when the phase difference is set to 4/T. FIG. 5 shows the main part of the second embodiment. There are three lighting systems, each of which emits red (R), green (G), and blue (B) colored light. In this embodiment, the second counter 2 is a ternary counter that starts counting from 0, and specifies the address of the RAM to start reading. Also, the first counter 1, which is a hexadecimal counter that starts counting from 0, receives clock pulses from the same clock generator OSC as the second counter 2, and performs a counting operation in synchronization with the clock pulses, but the first counter 1 is 1/3 Since the clock pulse is inputted through the frequency dividing circuit 3, the counting operation speed is 1/3 that of the second counter 2.
RAM that can be rewritten using input means (not shown)
The information read out is added to the output of the first counter 1 in the adder 4, and the output of this added value specifies the address at which reading from the ROM is to be started. When a ROM address is specified, the information stored at the specified address is converted to an analog signal via a D/A converter, and then sent to a multiplexer.
The MPX distributes and outputs the signals to sample and hold circuits SH1 to SH3 provided for each lighting system. The multiplexer MPX operates synchronously with the output signal of the second counter 2, and distributes and outputs the information read from the ROM to each lighting system in a time-sharing manner. In this embodiment, the phase difference between the dimming signals supplied to each lighting system is determined by the second counter 2.
This is possible by setting the RAM address from which to start reading. The diagram explains the operation of this second embodiment, and shows the first counter 1, the second counter 2,
RAM and ROM addresses are shown in hexadecimal notation. The pattern of the dimming signal corresponding to this diagram is shown in Figure 6a in correspondence with the address position stored in the ROM, and the pattern of the dimming signal supplied to each lighting system is also shown in correspondence with the diagram. Chapter 6b
As shown in the figure. In the above embodiment, only an example of application to a lighting system with two or three systems has been explained, but the present invention can also be applied to a multi-system lighting system with four or more systems by appropriately changing or increasing the circuit configuration. Needless to say, it is applicable. Furthermore, the dimming signals that can be controlled by the present invention are not limited to the above examples,
It goes without saying that various patterns of dimming signals can be generated by changing the data stored in the ROM.

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〔Effect of the invention〕

Since the present invention has the above configuration, it is possible to arbitrarily control temporal changes in the overlapping state of the outputs of each lighting system, which could not be obtained with conventional light control devices, by setting the phase difference of the light control signals. , Therefore, a dimming effect aimed at special effects can be obtained. Further, there is an advantage that it can deal with differences in response characteristics between dimming signals and brightness, which occur when loads with different load capacities are provided between lighting systems.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing a schematic configuration of the device of the present invention, FIGS. 2a to 2c are diagrams showing patterns of dimming signals that can be generated by the device of the present invention, and FIG. 3 is a diagram showing a specific example of the device of the present invention. FIG. 4a is a diagram showing an example of the pattern of the dimming signal generated by the embodiment, and FIG. 4b is a diagram showing the pattern of the dimming signal supplied to each lighting system. FIG. 5 is a second embodiment diagram showing a specific configuration of the device of the present invention; FIG. 6A is a diagram showing an example of a pattern of a dimming signal generated by the embodiment; FIG. 6B is a diagram showing an example of a pattern of a dimming signal generated by the embodiment; The figure is a pattern diagram of a dimming signal supplied to each lighting system, and FIG. 7 is a diagram showing an example of a dimming pattern generated by a conventionally known dimming device.

Claims (1)

[Claims] 1 It has at least two lighting systems, each of which emits light of a different color, and a dimming signal of a predetermined pattern is supplied to each of the lighting systems to temporally change the color of the combined light. A dimming device comprising: a dimming signal generating section that generates a dimming signal to be applied to the lighting system; a timing signal generating section that determines the timing of generating the dimming signal; and a timing signal generating section that supplies the dimming signal to each lighting system. and a phase difference setting means for setting a phase difference between the dimming signals, so as to make the cycle of the dimming signals supplied to each of the two or more lighting systems the same, and to set the phase difference of the dimming signals to the same period. What is claimed is: 1. A light control device comprising a phase difference setting means configured to be individually and adjustable.