WO2015051592A1

WO2015051592A1 - Control method of multiple lamps

Info

Publication number: WO2015051592A1
Application number: PCT/CN2014/000843
Authority: WO
Inventors: 林铭锋
Original assignee: 东林科技股份有限公司; 林铭锋
Priority date: 2013-10-11
Filing date: 2014-09-15
Publication date: 2015-04-16
Also published as: JP2016536747A; CN104582057A

Abstract

The present invention relates to a control method of multiple lamps, which is applied to a lighting system. The lighting system comprises an input interface, a signal transmission device, multiple signal receiving devices, multiple drive devices, and multiple lamps. The method comprises: the signal transmission device detecting a status of the input interface; the signal transmission device transmitting a corresponding signal according to the detected status; each signal receiving device receiving the signal and detecting a waveform of an alternating current power source; and each signal receiving device transmitting, on at least one base point in a period of the waveform of the alternating current power source, a corresponding control signal to each drive device according to the signal, so as to control the lamps. Therefore, the technical solution provided by the present invention can control simultaneous action of multiple lamps at the same time point.

Description

Multi-lamp control method

Technical field

The invention relates to a lighting system; in particular to a method of controlling multiple lamps.

Background technique

According to the conventional multi-lamp illumination system, there are an input interface provided at the control end, a signal transmission device, and a plurality of signal receiving devices, a plurality of driving devices and a plurality of lamps disposed at the load end. The input interface is electrically connected to the signal transmitting device, and the signal receiving device is connected to the transmitting device, and each of the signal receiving devices is electrically connected to each of the driving device and the luminaire. When the user operates the luminaire by the input interface, the signal transmitting device transmits a signal corresponding to the state of the input interface to the signal receiving device, and each of the signal devices transmits a corresponding control signal to each of the driving devices according to the signal. To control each of the lamps. Thereby, the purpose of controlling multiple lamps is achieved.

However, in actual use, since the signal receiving device is composed of electronic components, the internal signal timing may be due to factors such as manufacturing process differences, temperature changes, voltage instability, and noise interference of the electronic components themselves. The offset produces a timing error such that the signal receiving device each has an error in the time at which the control signal is transmitted, causing the luminaire to operate at different points in time. In particular, when the signal receiving device controls the driving device to repeatedly change the brightness of the light generated by the luminaire, the longer or repeated times of repeated changes, the more obvious the difference in brightness between the lamps, so that the luminaire cannot be maintained at Consistent brightness.

Summary of the invention

The main object of the present invention is to provide a control method for multiple lamps, which can control multiple lamps to operate at the same time.

The object of the present invention and solving the technical problems thereof are achieved by the following technical solutions. In order to achieve the foregoing object, the control method of the multi-lamp provided by the present invention is applied to an illumination system, which includes an input interface, a signal transmission device, a plurality of signal receiving devices, a plurality of driving devices and a plurality of lamps. The signal transmitting device is electrically connected to the input interface, and the signal transmitting device is connected to the signal receiving device. The signal receiving device is electrically connected to the AC power source, and each of the signal receiving devices is electrically connected to each other. The driving device and each of the lamps; the method comprises the following steps: A. the signal transmitting device detects the state of the input interface; B. the signal transmitting device transmits a corresponding signal according to the state detected in step A; Each of the signal receiving devices receives the signal and detects a waveform of the alternating current power source, and each of the signal receiving devices transmits a corresponding control signal to each of the driving signals according to the signal at least one reference point in a period of the waveform of the alternating current power source. Means to control each of the luminaires, wherein the reference of each cycle of the ac power source The point is the same.

The object of the present invention and solving the technical problems thereof can be further achieved by the following technical measures.

In the above method for controlling a plurality of lamps, wherein the step C includes: when each of the signal receiving devices determines that the signal includes a brightness adjustment command, each of the signal receiving devices controls each of the driving devices to cause the light generated by each of the lamps to be And changing between a brightness value and a second brightness value, wherein each of the signal receiving devices controls the driving devices to change the brightness of the light generated by each of the lamps when the reference point is in each cycle of the AC power waveform Difference.

The method for controlling a plurality of luminaires, wherein the step C further includes stopping the control of the change in brightness when each of the signal receiving devices determines that the signal includes a stop command, and recording the brightness value of the light generated by the luminaire, and The recorded brightness value controls the drive to cause the luminaire to produce a bright light having the recorded brightness value.

In the above method for controlling a plurality of lamps, wherein in step C, when each of the signal receiving devices determines that the signal includes a brightness adjustment command, each of the signal receiving devices controls each of the driving devices to cause the light generated by each of the lamps to be between The third brightness value between the first and second brightness values begins to change.

The foregoing multi-lamp control method, wherein the reference point in step C is a zero crossing point in a period of a waveform measured by each of the signal receiving devices.

In the foregoing method for controlling a multi-lamp, wherein the reference point in step C is a peak in a period of a waveform measured by each of the signal receiving devices.

In the foregoing method for controlling a multi-lamp, wherein the signal transmitting device is electrically connected to the AC power source, the signal receiving device is electrically connected to the signal transmitting device; in the step B, the signal transmitting device is detected according to the step A The measured state changes the waveform of the AC power source so that the half-wave period of the waveform of the AC power source has a delayed conduction angle and outputs, and the waveform of the AC power source having the delayed conduction angle constitutes the signal; in step C, each Receiving, by the signal receiving device, the electric energy output by the signal transmitting device, and after determining that the delayed conduction angle exists in the waveform of the electric energy outputted by the signal transmitting device, transmitting a corresponding control signal to each of the driving according to the delayed conduction angle A device to control each of the lamps.

In the foregoing method for controlling a multi-lamp, wherein the input interface includes a switch; in step A, detecting a state in which the switch is turned on or off; and in step B, the signal transmitting device changes the AC power source when the switch is turned on The waveform is generated to produce the delayed conduction angle.

In the foregoing method for controlling a multi-lamp, wherein the signal transmitting device and the signal receiving device are connected by a wireless communication.

Therefore, the present invention has at least the following advantages: by the control method, a plurality of lamps can be controlled to operate at the same time point, and the brightness of each of the lamps is effectively prevented from being inconsistent.

The above description is only an overview of the technical solutions of the present invention, and in order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification, and in order to make the above-mentioned Other objects, features, and advantages will be apparent from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a block diagram of an illumination system to which the first preferred embodiment of the present invention is applied.

Figure 2A is a waveform diagram showing that the positive half-wave trailing edge produces a delayed conduction angle when the switch is turned on.

Figure 2B is a waveform diagram showing that the positive half-wave trailing edge produces a delayed conduction angle when the switch is turned on.

Figure 3 is a flow chart of a first preferred embodiment of the present invention.

4 is a structural diagram of a lighting system to which the second preferred embodiment of the present invention is applied.

[Main component symbol description]

1: Lighting system 10: Input interface

102: switch 104: switch

12: Signal transmitting device 14: Driving device

16: Light-emitting diode module 18: Signal receiving device

182: Phase angle detection circuit 184: Processor

2: Lighting system 20: Input interface

202: switch 22: signal transmission device

222: Controller 224: Wireless signal transmitting unit

24: Drive 26: Fluorescent lamp

28: Signal receiving device 282: Wireless signal receiving unit

284: Processor 286: Waveform Detection Circuit

S: AC power supply

The best way to achieve your invention

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings. Referring to FIG. 1 , an illumination system 1 for applying a first preferred embodiment of the present invention includes an input interface 10 , a signal transmission device 12 , a plurality of driving devices 14 , and a plurality of illuminating devices with the LED module 16 as an example. Signal receiving devices 18. The control method of the multi-lamp shown in Fig. 3 will be described later with respect to the illumination system 1.

The input interface 10 includes a switch 102 and a switch 104. The switch 104 is a normally open push switch that is short-circuited when the user presses.

The signal transmission device 12 is electrically connected to the AC power source S through the switch 102, and the signal transmission device 12 is electrically connected to the switch 104. The switch 102 is used to control the conduction or blocking of power supplied to the signal transmitting device 12. The signal transmitting device 12 detects the state of the switch 104, and when the switch 104 is pressed and turned on, the signal transmitting device 12 changes the waveform of the AC power source S to make a positive half-wave period of the waveform of the AC power source S. Produce a delayed conduction angle and then lose And when the switch 104 is not pressed, the switch 104 is automatically reset to an open state, and the signal transmitting device 12 does not change the waveform of the AC power source S, that is, the waveform output by the signal transmitting device 12 No such conduction angle exists. The angle of the delayed conduction angle is preferably less than or equal to 90 degrees to reduce the harmonics of the alternating current power source S and to reduce the degree of power factor reduction. The waveform of the AC power source S having the delayed conduction angle is configured to transmit an electrical signal by pressing the state of the switch 104.

Referring to FIG. 2A, in the embodiment, when the switch 104 is pressed (such as waveform 1 in FIG. 2A), the signal transmitting device 12 changes the waveform of the AC power source S, and the positive half-wave period of the voltage waveform of the output thereof The trailing edge produces a delayed conduction angle (waveform 2 of Figure 2A). In practice, it can be designed to generate a retarded conduction angle at the leading edge of the positive half-wave period as shown in FIG. 2B, and of course, a negative half-wave front or trailing edge, or a positive half-wave and a negative half-wave period. The leading or trailing edge produces a delayed conduction angle, as well as the identification that the switch 104 is depressed.

The driving device 14 is electrically connected to the signal transmitting device 12 and the AC power source S. The LED modules 16 are electrically connected to the driving device 14, respectively. Each of the LED modules 16 has a plurality of LEDs. The illumination is received by receiving electrical energy output by the drive device 14 to produce bright light. Each of the driving devices 14 receives the electric energy output by the signal transmitting device 12 and converts the electric energy required by each of the LED modules 16 , and each of the driving devices 14 can controllably change the opening of each of the LED modules 16 . Off state and brightness. In this embodiment, each of the driving devices 14 is designed based on a Pulse Width Modulation (PWM) circuit, and the power supplied to each of the LED modules 16 is adjusted by pulse width modulation. The frequency width of the signal. Of course, in actual implementation, each of the driving devices 14 may also be a circuit design for adjusting the voltage magnitude or other adjusting power.

Each of the signal receiving devices 18 includes a phase angle detecting circuit 182 and a processor 184. Each of the phase angle detecting circuits 182 is electrically connected to each of the signal transmitting devices 12 for detecting a waveform of the electrical energy output by the signal transmitting device 12, detecting an angle of the delayed conduction angle, and transmitting the detection result. The processor 184 is provided.

Each of the processors 184 has a plurality of control modes, including a full-bright illumination mode, a default illumination mode, and a brightness adjustment mode, and controls the power output of each of the driving devices 14 in one of the control modes to drive Each of the LED modules 16 generates bright light, and determines the state of the switch 104 by using the result of detecting the delayed conduction angle of the phase angle detecting circuit 182 as a basis for switching the control mode. In order to enable the processor 184 to synchronously control the connected driving devices 14 at the same time point, each of the processors 184 can relatively acquire the period of the AC power source S by using the waveforms detected by the phase angle detecting circuits 182. And taking a reference point from the AC power supply S cycle for synchronization, wherein the reference point of each cycle of the AC power source S is the same. In this embodiment, the first zero crossing in each cycle is used as the reference point, and each processor 184 transmits a corresponding control signal to each of the drives at the reference point. The device 14 controls the actions of the LED modules 16, for example, turning on, off, and changing the brightness. In practice, the peak value in the waveform can also be used as a reference point, and the synchronization effect can also be achieved.

The operation of the control mode is illustrated by a set of processors 184 and drive means 14, wherein:

In the full-bright illumination mode, the processor 184 transmits a control signal at the reference point in the period of the waveform of the AC power source S to control the driving device 14 to drive the LED module 16 to generate a maximum brightness value at a rated power. Bright light.

In the default illumination mode, the processor 184 transmits a control signal at the reference point in the period of the waveform of the AC power source S to control the driving device 14 to drive the LED module 16 to generate a brightness of a default brightness value. In this embodiment, the preset brightness value is initially set to be half of the maximum brightness value, and in the brightness adjustment mode, the preset brightness value is updateable.

In the brightness adjustment mode, the processor 184 is configured to control the brightness of the light generated by the driving device 14 to drive the LED module 16 to be repeated between a first brightness value and a second brightness value, wherein the processor 184 is in the communication. The reference point in each cycle of the power source S controls the driving device 14 to drive the light generated by the LED module 16 to increase or decrease the brightness difference. Until the processor 184 determines that the state of the switch 104 changes, the control changes the brightness, and records the brightness value of the light generated by the LED module 16 at the moment, and replaces the recorded brightness value with the default of the default illumination mode. The brightness value is driven and the LED module 16 is driven to produce a bright light having a new predetermined brightness value. In this embodiment, the first brightness value is a maximum brightness value, and the second brightness value is a minimum brightness value, whereby in the brightness adjustment mode, the brightness of each of the LED modules 16 is at a maximum brightness and a minimum brightness. Change between.

In practice, the light generated by the LED module 16 can be increased or decreased by a third brightness value between the first and second brightness values, and repeated between the first brightness value and the second brightness value. Variety. The third brightness value can be set to one-half of the maximum brightness value. Thereby, when switching to the brightness adjustment mode, the center light is first illuminated to prevent the user from feeling uncomfortable due to too much brightness change. In addition, two zero crossing points or two peaks may be taken in each cycle of the alternating current power source S as reference points for increasing or decreasing the luminance difference.

When the switch 102 is turned on to enable the AC power S to be turned on, the processor 184 is preset to operate in the full-bright illumination mode to make the brightness of the LED module 16 the brightest.

Since the delay conduction angle exists in each of the waveforms of the electric energy outputted by the signal transmission device 12 during the period in which the switch 104 is pressed, the processor 184 can calculate the number of cycles having the delayed conduction angle. The pressing time of the switch being pressed, using the length of the pressing time as an instruction in the electrical signal, and defining that the pressing time is less than a predetermined time (1.2 seconds in the embodiment) is a switching instruction; the pressing time is greater than The predetermined time is a brightness adjustment command.

The processor 184 determines that the electrical signal measured by the phase angle detecting circuit 182 has the switching command, that is, switches to the default lighting mode when the electrical signal is measured at the reference point of the AC power S waveform cycle; when another switching instruction is received, The processor 184 controls each of the driving devices 14 to block the power supplied to each of the LED modules 16 during the reference point of the AC power S waveform cycle, so that each of the LED modules 16 is in an extinguished state; The switching command switches to the full-bright illumination mode at the reference point in the AC power S waveform cycle, and thus cyclically switches.

When the processor 184 determines that the electrical signal has the brightness adjustment command, the processor 184 switches to the brightness adjustment mode at a reference point in the AC power S waveform cycle for the user to change the set preset brightness value. In the brightness adjustment mode, when the processor 184 determines that the state of the switch 104 has changed (defined as a stop command), the control of the change in brightness is stopped.

With the above structure, when the illumination system 1 is applied to a building, the input interface 10 and the signal transmission device 12 can be installed on the wall surface of the building (ie, installed at the control end), and each group of The signal receiving device 18, the driving device 14, and the light emitting diode module 16 are mounted on a wall surface or a ceiling of the building (that is, mounted on the load end). In this way, the signal transmitting device 12 and each of the signal receiving devices 18 need only be connected by two wires connected to the AC power source S. In other words, the waveform corresponding to the state of the switch 104 can be transmitted by using the original wiring of the building. Each of the signal receiving devices 18.

And each of the signal receiving devices 18 determines the state of the switch 104, and sends a corresponding control signal to each of the driving devices 14 at the same time point (ie, a reference point in the waveform period of the AC power source S) to control each of the light emitting diodes. Module 16. Thereby, when a plurality of lamps are controlled, the effect of the synchronous control can be effectively achieved. In particular, for the brightness adjustment mode, if there is no synchronization mechanism, the longer or longer the brightness of the light generated by the LED module 16 is repeated, the more obvious the difference in brightness between the LED modules 16 is. The reference point in the AC power supply S cycle is used for synchronization, and the brightness of the LED module 16 can be effectively maintained.

In practice, each of the LED modules 16 can include a plurality of first LEDs and a plurality of second LEDs, and the color of the first LED is different from the color of the second LED. For example, the light color of the first light emitting diode is a luminescent color system (such as white light, blue light, etc.), and the light color of the second light emitting diode is a warm light color (such as yellow light, red light, etc.).

Each of the driving devices 14 can individually control the brightness ratio of the first light emitting diode and the second light emitting diode, and the brightness ratio refers to the brightness value of the light generated by the first and second light emitting diodes. The ratio of the brightness of the first light-emitting diode to the brightness of the second light-emitting diode can be adjusted to adjust the color temperature of the light generated by each of the light-emitting diode modules 16 .

In the control mode of the processor 184, the full-brightness illumination mode includes first brightness ratio information, and the first brightness ratio information is a brightness ratio of the first and second light-emitting diodes when the full-light illumination mode is recorded. The default illumination mode includes second brightness ratio information, the second brightness The degree ratio information is a brightness ratio of the first and second light emitting diodes when the default illumination mode is recorded.

The control mode of the processor 184 further includes a chromaticity adjustment mode for adjusting the first ratio information or the second ratio information. When the processor 184 operates in the full-bright illumination mode or the default illumination mode, the user continuously presses the switch 104 for more than the set time (4 seconds in this embodiment) to define a chroma adjustment command, the processor 184 When it is determined that the electric signal has a chromaticity adjustment command, the chromaticity adjustment mode is switched to the reference point of the period of the waveform of the AC power supply S. among them:

The chromaticity adjustment mode is to control each of the driving devices 14 to drive each of the LED modules 16 to generate bright light, and repeatedly change each of the light emitting diodes if the brightness value (ie, the maximum brightness value or the preset brightness value) is constant. a brightness ratio of the first light emitting diode of the module 16 and the second light emitting diode, and increasing or decreasing a brightness ratio difference at a reference point in each cycle of the alternating current power source S until the processor 184 determines the When the state of the switch 104 is changed, the change of the brightness ratio of the first and second light emitting diodes is stopped, and the brightness ratio of the first and second light emitting diodes is recorded, and the recorded brightness ratio is replaced by the full brightness illumination. The original first brightness ratio information of the mode or the second brightness ratio information of the original default mode is replaced, and the first and second light emitting diodes are driven to generate bright light having a new brightness ratio. With the reference point in the period of the AC power supply S, the difference in the luminance ratio generated between the LED modules 16 can also be avoided.

In the above embodiment, the state corresponding to the input interface 10 is transmitted by using the waveform of the AC power source S as an electric signal, and another embodiment is provided below, which has the same effect as the synchronization control of the first embodiment.

4 is an illumination system 2 to which a control method for a multi-luminaire according to a second preferred embodiment of the present invention is applied, which has a structure similar to that of the first preferred embodiment, and includes an input interface 20, a signal transmission device 22, and a plurality of The driving device 24 includes a plurality of lamps exemplified by the fluorescent lamps 26 and a plurality of signal receiving devices 28.

The input interface 20 includes a switch 202. The signal transmission device 22 includes a controller 222 and a wireless signal sending unit 224. The controller 222 detects the state of the switch 202 and generates a wireless signal with an instruction according to the switch state. The wireless signal transmitting unit 224 transmits the medium command of the wireless signal, which may be a switching instruction, a brightness adjustment instruction, or a stop instruction.

The driving device 24 is electrically connected to the AC power source S, and is individually connected to the fluorescent lamp 26. In the embodiment, each of the driving devices 24 is a dimmable type ballast, and each of the driving devices 24 is controllable and changeable. The power supplied to the fluorescent lamp 26 is supplied to adjust the brightness or the on/off state of the fluorescent lamp 26.

Each of the signal receiving devices 28 includes a wireless signal receiving unit 282, a processor 284 and a waveform detecting circuit 286, and each of the wireless signal receiving units 282 receives the signal transmitting device 22 for transmitting. The wireless signal is then transmitted to the processor 284. The waveform detecting circuit 286 is electrically connected to the AC power source S for detecting the waveform of the AC power source S, and transmitting the detection result to each of the processors 284, and each of the processors 284 can be relatively obtained. The period of the alternating current power source S is taken from the reference point of the alternating current power source S for synchronization.

Each of the processors 284 is electrically connected to each of the driving devices 24, and each of the processors 284 also has a plurality of control modes built therein, including a full-bright illumination mode, a default illumination mode, and a brightness adjustment mode, and the principle and the first mode of each control mode. The difference is the same in the embodiment, the difference is only in the driving device 24 controlled by the processor 284, and details are not described herein. Similarly, each of the processors 284 transmits a control signal to each of the driving devices 24 at a reference point in the cycle of the waveform of the AC power source, whereby the operation of the fluorescent lamp 26 can be simultaneously controlled, and the device is effectively ensured. The fluorescent lamps 26 have the same brightness.

In summary, the control method of the multi-lamp of the present invention, by using the waveform of the AC power source S as a basis for synchronization, ensures that all signal receiving devices transmit control signals to the driving device to control the lamps at the same time point each time. Effectively aligning the luminaires. It is avoided that the respective lamps do not operate inconsistently when each signal receiving device performs control separately.

In addition, the lighting system uses lamps other than LED modules and fluorescent lamps, but also other types of lamps, such as fluorescent lamps, gas generator lamps, etc. For different types of lamps, only the corresponding driving device is required. The control method of the invention.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. The skilled person can make some modifications or modifications to the equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The invention is not limited to any simple modifications, equivalent changes and modifications of the above embodiments.

Claims

A multi-luminaire control method is characterized in that it is applied to an illumination system, and the illumination system comprises an input interface, a signal transmission device, a plurality of signal receiving devices, a plurality of driving devices and a plurality of lamps, wherein the signal transmission The device is electrically connected to the input interface, and the signal transmitting device is connected to the signal receiving device. The signal receiving device is electrically connected to the AC power source, and each of the signal receiving devices is electrically connected to each of the driving devices and the respective devices. The luminaire; the method includes the following steps:

A. The signal transmitting device detects the state of the input interface;

B. The signal transmitting device transmits a corresponding signal according to the state detected in step A;

C. each of the signal receiving devices receives the signal and detects a waveform of the alternating current power source, and each of the signal receiving devices transmits a corresponding control signal according to the signal to each of the at least one reference point in a period of the waveform of the alternating current power source. a driving device to control each of the lamps, wherein the reference point of each cycle of the alternating current power source is the same.
The method for controlling a multi-lamp according to claim 1, wherein the step C includes: when each of the signal receiving devices determines that the signal includes a brightness adjustment command, each of the signal receiving devices controls each of the driving devices, And causing the brightness generated by each of the lamps to vary between the first brightness value and the second brightness value, wherein each of the signal receiving devices controls each of the driving devices at the reference point in each cycle of the AC power source waveform The brightness produced by each of the luminaires is changed by the brightness difference.
The control method of a multi-lamp according to claim 2, wherein in step C, the signal receiving means further stops controlling the change of the brightness when the signal receiving means determines that the signal includes a stop command, and records that the lamp is generated immediately. The brightness value of the brightness, and controlling the driving device to cause the luminaire to produce a bright light having the recorded brightness value based on the recorded brightness value.
The method of controlling a plurality of luminaires according to claim 2, wherein in the step C, when each of the signal receiving devices determines that the signal includes a brightness adjustment command, each of the signal receiving devices controls each of the driving devices The brightness produced by each of the luminaires begins with a third brightness value between the first and second brightness values.
The multi-lamp control method according to claim 1, wherein the reference point in step C is a zero crossing point in a period of a waveform measured by each of the signal receiving devices.
The multi-lamp control method according to claim 1, wherein the reference point in step C is a peak in a period of a waveform measured by each of the signal receiving devices.
The method of controlling a multi-lamp according to claim 1, wherein the signal transmitting device is electrically connected to the alternating current power source, and the signal receiving device is electrically connected to the signal transmitting device; in step B, the signal is The transmitting device changes the waveform of the AC power source according to the state detected in the step A, so that the half-wave period of the waveform of the AC power source has a delay conduction. After the corner output, the waveform of the AC power source having the delayed conduction angle constitutes the signal; in step C, each of the signal receiving devices receives the power output by the signal transmitting device, and determines the waveform of the power output by the signal transmitting device. After the delay conduction angle is present, a corresponding control signal is transmitted to each of the driving devices according to the delayed conduction angle to control each of the lamps.
The method for controlling a multi-lamp according to claim 7, wherein the input interface comprises a switch; in step A, the state of detecting the on or off of the switch is detected; in step B, when the switch is turned on The signal transmitting device changes a waveform of the alternating current power source to generate the delayed conduction angle.
The method of controlling a multi-lamp according to claim 1, wherein the signal transmitting device and the signal receiving device are connected by a wireless communication.