JP2010165522A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system that simplifies a system structure and is easy to use. <P>SOLUTION: Address data transmitting from a lighting device 11 to a designated range by a visible light communication method is received with a remote controller 12. Remote-controller signals including the address data and dimming data is transmitted from the remote controller 12 to a control device 13. A control signal including the address data is transmitted from the control device 13 to the lighting device 11 through a signal line 21 by superimposing on a PWM signal. The lighting device 11 is dimmed on the basis of the PWM signal of its own address data. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an illumination system that controls dimming of a specific illumination device from among a plurality of illumination devices with a remote controller.

  Conventionally, in a lighting system, for example, it is common to operate a plurality of lighting devices with an operation panel installed on a wall surface or the like. However, if only a specific lighting device is to be operated, the position of the lighting device must be grasped, and the lighting device must be selected and operated on the operation panel. In particular, since the operation panel may be installed in a room other than the room where the lighting device is installed, the operator who operates the operation panel operates the lighting device while checking the lighting effect at the actual lighting location. Difficult to do.

  Also, in remote operation with a portable remote controller, the lighting device can be operated while confirming the lighting effect at the actual lighting location, but among the plurality of lighting devices, the lighting device that illuminates the lighting location is, for example, a layout drawing Therefore, it is necessary to select and operate the lighting device, and there is a problem that it takes time to set the lighting.

  Further, if the lighting device can be remotely operated with a portable remote controller, it is possible to operate while confirming the lighting effect at an actual lighting place. In this case, since a plurality of lighting devices are installed, even if it is attempted to operate only a specific lighting device with the remote controller, if the remote controller and the lighting device do not correspond one-on-one, the lighting device that is not the control target is operated. Will end up. Therefore, for each lighting device, it is necessary to provide an address setting, a transmission function for transmitting address data to the remote control, and a reception function for receiving a remote control signal from the remote control. For transmitting the address data from the illumination device to the remote controller, for example, a visible light communication technique in which the address data is superimposed on the illumination light and transmitted (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-174877 (page 10-12, FIG. 9)

  As described above, in order to remotely control only a specific lighting device from among a plurality of lighting devices by a portable remote control, a transmission function for transmitting address data to the remote control for each lighting device, and a remote control from the remote control It is necessary to provide a reception function for receiving signals. However, although the transmission function can be easily added by using a technique such as visible light communication, a receiver is always required for the reception function, and it is necessary to add a receiver for each lighting device. There is a problem that the system configuration becomes complicated.

  The present invention has been made in view of these points, and an object thereof is to provide a lighting system that can simplify the system configuration and is easy to use.

  The lighting system according to claim 1, wherein the lighting system has its own address, receives a control signal including its own address data in a wired manner and a PWM signal on which the control signal is superimposed, and receives its own address data based on the control signal. A plurality of lighting devices that can be transmitted in a predetermined region with visible light and dimming based on the PWM signal; and address data that is transmitted from the lighting device into the predetermined region with visible light can be received and received A remote control that transmits a remote control signal including address data and dimming data; receives a remote control signal from the remote control and is connected to a plurality of lighting devices by wire, and receives a control signal including address data of the lighting device based on the remote control signal And a control device that transmits the signal in a wired manner superimposed on the PWM signal.

  The lighting device includes, for example, a receiving function for receiving a signal by wire, a light source such as a lamp and an LED, and a lighting device having a function of dimming the light source based on a PWM signal. The visible light that transmits address data to the remote controller is preferably configured so that it can be transmitted within a predetermined area that does not interfere with the visible light transmission area from other lighting devices. For example, the address data is superimposed on the light from the light source. The visible light communication system that transmits the data can be employed. Further, the lighting device performs light control by turning off the light source in the on period of the PWM signal and turning on the light source in the off period.

  The remote control is not a stationary type and can be carried freely. For example, a remote control using a battery as a power source and a notebook computer or the like may be used as long as the following functions are added. The remote control includes a receiving unit function for receiving address data transmitted from the lighting device by visible light within a predetermined transmission area of the lighting device, a storage unit function for storing the received address data, and a dimming of the lighting device. Etc., a transmission unit function for transmitting a remote control signal including address data and dimming data of the lighting device to be operated to the control device, and the like.

  Transmission of signals from the remote control to the control device may be, for example, wireless such as radio waves or infrared rays, or may be wired if the remote control is freely movable.

  For the control device, for example, a reception function for receiving a remote control signal transmitted from the remote control by radio or wire such as radio waves or infrared rays, a control signal including address data of the lighting device based on the remote control signal is superimposed on the PWM signal And the function to send them. Note that the control device can control the lighting device even by setting with a setting device such as an operation panel installed on a wall surface or the like.

  A signal line may be used for the wire used for transmitting a signal from the control device to the lighting device, or a power line carrier system that transmits a signal through a power line connected to each lighting device may be used.

  The illumination system according to claim 2 is the illumination system according to claim 1, wherein the control device uses a control signal to be superimposed on the PWM signal as a pulse signal having a width of 5% or less of one period of the PWM signal. It is.

  If the pulse signal has a width of 5% or less of one period of the PWM signal, the influence of the control signal on the PWM signal on the illumination light of the illumination device is small.

  The illumination system according to claim 3 is the illumination system according to claim 1 or 2, wherein the control device uses the PWM signal when the control signal is not superimposed on the average voltage of the PWM signal when the control signal is superimposed. Is the same as the average voltage.

  If the average voltage of the PWM signal is the same regardless of whether or not the PWM signal is superimposed, the influence of the control signal on the PWM signal on the illumination light of the lighting device is small.

  According to a fourth aspect of the present invention, in the lighting system according to any one of the first to third aspects, the controller is configured to control the control signal within a range where the on-period ratio of the PWM signal is 5% to 95%. The average voltage of the PWM signal is not changed regardless of the presence or absence of the superposition, and the average voltage of the PWM signal is allowed to change due to the superposition of the control signal outside the range of 5% to 95%.

  When the ratio of the on period of the PWM signal is 5% or less, the lighting device is turned on 100%, and when it is 95% or more, the lighting device is turned off. If the average voltage of the PWM signal is not changed regardless of whether or not the control signal is superposed within the range of the ON period of the PWM signal from 5% to 95%, the illumination device by superimposing the control signal on the PWM signal There is little influence on illumination light.

  According to a fifth aspect of the present invention, in the lighting system according to the fourth aspect, the control device superimposes the control signal when the on-period ratio of the PWM signal is within a range from 5% to a predetermined dimming lower limit value. The average voltage of the PWM signal is not changed regardless of the presence or absence of the signal, and the average voltage of the PWM signal is allowed to change due to the superposition of the control signal outside the range from 5% to a predetermined dimming lower limit value.

  The predetermined dimming lower limit value indicates a value at which the brightness does not change when the light from the lighting device is darkened. If the average voltage of the PWM signal is changed regardless of whether or not the control signal is superposed within the range of the ON period of the PWM signal from 5% to a predetermined dimming lower limit value, the superposition of the control signal on the PWM signal is performed. Has little effect on the illumination light of the lighting device.

  A lighting system according to a sixth aspect is the lighting system according to any one of the first to fifth aspects, wherein the control device relates a PWM signal superimposed with a control signal to be transmitted according to the remote control signal to the remote control signal. It is set shorter than the width of the PWM signal on which the control signal to be transmitted is superimposed.

  A control signal may be superimposed on the portion of the PWM signal whose width is shortened.

  Before the other lighting device reacts, the transmission of the PWM signal in which the control signal corresponding to the remote control signal is superimposed is completed, and the influence of the control signal on the PWM signal on the illumination light of the other lighting device is prevented. The

  According to a seventh aspect of the present invention, in the lighting system according to any one of the first to sixth aspects, the control signal is a PWM signal on which a control signal transmitted in response to the remote control signal is superimposed, and the remote control signal is related to the remote control signal. This is different from the peak value of the PWM signal on which the control signal to be transmitted is superimposed.

  It becomes easy to identify the PWM signal on which the control signal is superimposed.

  According to the illumination system of the first aspect, the remote controller receives address data to be transmitted by visible light from the illumination device into a predetermined area, and receives a remote control signal including the address data and the dimming data from the remote controller to the control device. The control signal including the address data of the lighting device is superimposed on the PWM signal from the control device and transmitted to the lighting device by wire, and the lighting device performs dimming based on the PWM signal of its own address data. There is no need to provide a receiver for each device, and the system configuration can be simplified, and an easy-to-use lighting system can be provided.

  According to the illumination system of claim 2, in addition to the effect of the illumination system of claim 1, the control signal to be superimposed on the PWM signal is a pulse signal having a width of 5% or less of one period of the PWM signal. Therefore, the influence on the illumination light of the illumination device due to the superimposition of the control signal on the PWM signal can be reduced.

  According to the illumination system of claim 3, in addition to the effect of the illumination system of claim 1 or 2, the average voltage of the PWM signal when the control signal is superimposed is the same as when the control signal is not superimposed. Since it is the same as the average voltage of the PWM signal, the influence on the illumination light of the illumination device due to the superimposition of the control signal on the PWM signal can be reduced.

  According to the lighting system of the fourth aspect, in addition to the effect of the lighting system according to any one of the first to third aspects, the control is performed when the ratio of the ON period of the PWM signal is in the range of 5% to 95%. The average voltage of the PWM signal is not changed regardless of whether the signal is superimposed or not, and the average voltage of the PWM signal is allowed to change due to the superposition of the control signal outside the range of 5% to 95%. The influence on the illumination light of the illumination device due to the superimposition of the control signal can be reduced.

  According to the lighting system of the fifth aspect, in addition to the effect of the lighting system of the fourth aspect, the control signal is within the range where the on-period ratio of the PWM signal is from 5% to a predetermined dimming lower limit value. In order to allow the average voltage of the PWM signal to change due to the superimposition of the control signal outside the range from 5% to a predetermined dimming lower limit value without changing the average voltage of the PWM signal regardless of whether or not the superimposition is performed. The influence on the illumination light of the illumination device due to the superimposition of the control signal on the PWM signal can be reduced.

  According to the illumination system of the sixth aspect, in addition to the effect of the illumination system according to any one of the first to fifth aspects, the PWM signal on which the control signal to be transmitted according to the remote control signal is superimposed is converted into the remote control signal. Since the control signal to be transmitted is set to be shorter than the width of the superimposed PWM signal regardless of whether the transmission of the PWM signal superimposed with the control signal according to the remote control signal is completed before another lighting device reacts, It is possible to prevent the influence of the control signal on the signal from affecting the illumination light of another illumination device.

  According to the lighting system of the seventh aspect, in addition to the effect of the lighting system according to any one of the first to sixth aspects, a PWM signal on which a control signal to be transmitted in accordance with a remote control signal is superimposed is obtained as a remote control signal. Since the control signal to be transmitted is made different from the peak value of the superimposed PWM signal regardless of whether the control signal is superimposed, the PWM signal on which the control signal is superimposed can be easily identified.

It is explanatory drawing of the illumination system which shows one embodiment of this invention. It is a wave form diagram of the PWM signal transmitted from the control apparatus of a lighting system same as the above. The average voltage of the PWM signal is the same as above, (a) is a waveform diagram in which the control signal is superimposed, and (b) is a waveform diagram in which the control signal is not superimposed. It is a graph which shows the relationship between the ratio of the ON period of a PWM signal, and dimming degree same as the above. The PWM signal to be transmitted in response to the remote control signal is set to be shorter than the response width of the lighting device that receives the control signal to be transmitted regardless of the remote control signal, and (a) is a control signal not related to the remote control signal. FIG. 4B is a waveform diagram of a PWM signal on which a control signal corresponding to a remote control signal is superimposed. It is a wave form diagram which shows that the peak value of the PWM signal which the control signal according to a remote control signal same as the above differs differs.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory diagram of a lighting system, FIG. 2 is a waveform diagram of a PWM signal transmitted from a control device of the lighting system, FIG. 3 shows that the average voltage of the PWM signal is the same, and (a) FIG. 4B is a waveform diagram in which the control signal is superimposed, FIG. 4B is a waveform diagram in which the control signal is not superimposed, FIG. 4 is a graph showing the relationship between the ratio of the ON period of the PWM signal and the dimming degree, and FIG. Indicates that the PWM signal to be transmitted in response to the signal is set to be shorter than the response width of the lighting device that receives the control signal to be transmitted regardless of the remote control signal, and (a) is superimposed with the control signal not related to the remote control signal FIG. 6B is a waveform diagram of a PWM signal on which a control signal corresponding to a remote control signal is superimposed. FIG. 6 shows that the peak values of the PWM signal superimposed on a control signal corresponding to the remote control signal are different. FIG.

  In FIG. 1, the illumination system includes a plurality of illumination devices 11 installed in an illumination space, a remote controller 12 that selects and operates a specific illumination device 11, and a control device 13 that controls the plurality of illumination devices 11. .

  The lighting device 11 adjusts the light source based on a fixture body installed at an installation location such as a ceiling surface, a lighting fixture having a reflector or a louver, a light source such as a lamp or LED, and a PWM (Pulse Width Modulation) signal. A lighting device having a function of

  The lighting device of the lighting device 11 has its own unique address for each lighting device 11, and receives a control signal including its own address data and a PWM signal on which this control signal is superimposed on a signal line 21 as a wire. And a transmission function for transmitting to the remote controller 12 by a visible light communication system in which address data is superimposed on the light from the light source for transmission. The lighting device turns off the light source during the on period of the PWM signal and turns on the light source during the off period to adjust the light.

  The region 22 in which the address data can be transmitted from the lighting device 11 to the remote control 12 is a region where light from the lighting device 11 reaches, but a region that does not interfere with light from other adjacent lighting devices 11 is good. A predetermined region centered on the position directly below the lighting device 11 is preferable.

  In addition, the remote controller 12 is not a stationary type and can be freely carried, for example, a remote controller using a battery as a power source.

  The remote controller 12 receives a receiving unit function (light receiving unit function) that receives address data that is transmitted from the lighting device 11 while being superimposed on light by a visible light communication method within a predetermined transmission area of the lighting device 11. Control unit for storing unit function for storing address data, operation unit function including buttons and keys for operating dimming and setting mode of lighting device 11, and remote control signal including address data and dimming data for operating lighting device 11 13 includes a transmitter function for transmitting to 13.

  For example, radio waves or infrared rays are used for transmission of signals from the remote controller 12 to the control device 13, but may be wired as long as the remote controller 12 can be freely moved.

  The control device 13 includes a control unit 25 that controls the plurality of lighting devices 11, a remote control receiving unit 26 that receives a remote control signal transmitted from the remote controller 12, and a control terminal 27 to which the plurality of lighting devices 11 are connected. The control unit 25, the remote control receiving unit 26, and the control terminal device 27 are connected to each other so as to be communicable with each other using a signal line 21 and a general communication method. Note that a plurality of control terminals 27 may be installed for each lighting block, floor, or the like, and the plurality of control terminals 27 may be connected to the control unit 25 via the signal line 21 so as to communicate with each other.

  The remote control receiving unit 26 receives, for example, a remote control signal transmitted from the remote control 12 by radio such as radio waves or infrared rays, converts the signal into a signal corresponding to the communication method on the signal line 21, and transmits the signal to the control unit 25. To do. For example, one remote control receiving unit 26 is arranged for each of the plurality of lighting devices 11 such as each lighting block or each floor that can receive a remote control signal transmitted from the remote control 12.

  The control terminal 27 is connected to the lighting devices of the plurality of lighting devices 11 through a signal line 21a, receives a signal transmitted from the control unit 25 through the signal line 21, and corresponds to a communication method on the signal line 21a. And is transmitted to each lighting device 11.

  The control unit 25 has the following functions. Each function may work together or work alternatively.

  A function that shifts to a setting mode based on a setting mode signal from the remote controller 12 and transmits address data from each lighting device 11 by a visible light communication method.

  A function of transmitting a control signal including address data of the lighting device 11 to the lighting device 11 by superimposing the control signal on the PWM signal based on a remote control signal including address data and dimming data from the remote controller 12.

  A function in which the control signal to be superimposed on the PWM signal is a pulse signal having a width of 5% or less of one period of the PWM signal.

  A function of making the average voltage of the PWM signal when the control signal is superimposed the same as the average voltage of the PWM signal when the control signal is not superimposed.

  When the ratio of the on period of the PWM signal is within a range of 5% to 95%, the average voltage of the PWM signal is not changed regardless of whether the control signal is superimposed or not, and when the ratio is outside the range of 5% to 95%, the control signal is superimposed. This function allows the average voltage of the PWM signal to change. More preferably, when the ratio of the ON period of the PWM signal is within a range from 5% to a predetermined dimming lower limit value, the average voltage of the PWM signal is not changed regardless of whether or not the control signal is superimposed. A function that allows the average voltage of the PWM signal to change due to the superposition of the control signal outside the range up to the dimming lower limit.

  A function of setting a PWM signal for superimposing a control signal to be transmitted according to a remote control signal to be shorter than a width of the PWM signal for superimposing a control signal to be transmitted regardless of the remote control signal.

  A function of making the PWM signal superimposed with the control signal transmitted in response to the remote control signal different from the peak value of the PWM signal superimposed with the control signal transmitted regardless of the remote control signal.

  In addition, the control unit 25 can control the illumination device 11 by setting with a setting device such as an operation panel installed on a wall surface or the like.

  Next, the operation of the lighting system will be described.

  In the control unit 25, a dimming degree of the plurality of lighting devices 11, a time schedule for switching the dimming degree of the lighting device 11, and the like are set in advance. The plurality of lighting devices 11 receive the PWM signal transmitted from the control unit 25 and illuminate with the dimming degree corresponding to the PWM signal.

  A case where the dimming of a specific lighting device 11 is operated with the remote controller 12 will be described.

  A remote control signal including a setting mode signal from the remote controller 12 when the operator operates the setting mode with the remote controller 12 in a predetermined transmission range centered on a position directly below the specific lighting device 11 that the operator wants to operate. Send.

  The control unit 25 receives a remote control signal including the setting mode signal from the remote controller 12 via the remote control receiving unit 26, and the control unit 25 causes the illumination system to shift from the normal mode to the setting mode.

  When shifting to the setting mode, the control unit 25 superimposes the control signal including the address data of each lighting device 11 on the PWM signal and transmits it to the lighting device 11, and transmits the address data from each lighting device 11 by the visible light communication method. Let

  Thereby, the remote controller 12 in a predetermined transmission range centered on the position directly below the specific lighting device 11 receives, recognizes and stores the address data transmitted by the visible light communication method.

  When the operator operates the dimming level with the remote controller 12, the remote controller 12 transmits a remote control signal including address data and dimming data.

  The control unit 25 receives a remote control signal including address data and dimming data from the remote control 12 via the remote control receiving unit 26. The control unit 25 superimposes a control signal including the address data of the lighting device 11 on the PWM signal adjusted according to the light control data based on the remote control signal including the address data and the light control data, and transmits the control signal to the lighting device 11. To do.

  The lighting device 11 with the corresponding address receives the control signal including the address data and the PWM signal, and changes the light control according to the PWM signal. The lighting devices 11 other than the corresponding address do not receive the control signal including the address data and the PWM signal, and do not change the light control.

  In the dimming operation of the lighting device 11 using the remote controller 12, for example, when the lighting device 11 of the entire lighting block or the floor is turned on, the unnecessary lighting device 11 is turned off, or conversely, the lighting block or Necessary lighting devices 11 can be turned on in a state where the lighting devices 11 of the entire floor are turned off. In the state where the lighting device 11 is turned off, the visible light communication method is used to transmit the address data from the lighting device 11 to the remote controller 12, and therefore the lighting device 11 is turned on once to transmit the address data. Become.

  To end the setting mode, a signal indicating completion is transmitted to the control unit 25 by operating the remote controller 12 after setting, or the control unit 25 receives a remote control signal including address data and operation data transmitted from the remote control 12. As a result, the control unit 25 ends the setting mode.

  As described above, the remote controller 12 receives address data to be transmitted from the lighting device 11 into a predetermined area, and transmits a remote control signal including address data and dimming data from the remote controller 12 to the control device 13. A control signal including address data of the lighting device 11 is superimposed on the PWM signal and transmitted to the lighting device 11 by wire, and the lighting device 11 performs dimming based on the PWM signal of its own address data. It is not necessary to provide a receiver, and the system configuration can be simplified and an easy-to-use lighting system can be provided.

  Next, superposition of the control signal on the PWM signal transmitted from the control unit 25 to the specific lighting device 11 will be described.

  As shown in FIG. 2, for example, a control signal including address data of the lighting device 11 is superimposed on a PWM signal of 100 to 1000 kHz. The control signal may be superimposed on either the on period or the off period of the PWM signal. By superimposing the control signal on the PWM signal, the influence on the illumination light of the illumination device 11 is likely to occur. However, the control signal superimposed on the PWM signal is a pulse signal having a width of 5% or less of one period of the PWM signal. . Thereby, the influence on the illumination light of the illuminating device 11 by the superimposition of the control signal on the PWM signal can be reduced.

  Also, as shown in FIG. 3, the average voltage of the PWM signal when the control signal is superimposed is the same as the average voltage of the PWM signal when the control signal is not superimposed. For example, as shown in FIG. 3 (a), when the control signal is superimposed on the ON period of the PWM signal, the average voltage of the ON period in one cycle is the control signal as shown in FIG. 3 (b). It is the same as the average voltage of the ON period in one cycle of the PWM signal when not superposed. Thereby, the influence on the illumination light of the illuminating device 11 by the superimposition of the control signal on the PWM signal can be reduced.

  Further, as shown in FIG. 4, when the ratio of the ON period of the PWM signal is within a range of 5% to 95%, the average voltage of the PWM signal is not changed regardless of whether the control signal is superimposed or not. Outside the range of%, the average voltage of the PWM signal is allowed to change due to the superposition of the control signal. In the range of 5% to 95%, the brightness changes when the average voltage of the PWM signal changes, but in the range of 0% to 5%, the brightness does not change with 100% lighting, and 95% This is because when the average voltage of the PWM signal changes, there is no problem because the brightness is not changed by turning off the light in the range of ˜100%.

  Further, when the ratio of the on period of the PWM signal is within a range from 5% to a substantially predetermined dimming lower limit value, the average voltage of the PWM signal is not changed regardless of whether the control signal is superimposed or not. Outside the range up to the dimming lower limit, the average voltage of the PWM signal is allowed to change due to the superposition of the control signal. This is because even if the ratio of the on period of the PWM signal is increased, the brightness does not decrease from the substantially predetermined dimming lower limit value. Therefore, the ratio of the on period of the PWM signal is the predetermined dimming lower limit value. This is because there is no problem even if the average voltage of the PWM signal is changed.

  Therefore, when the ratio of the on period of the PWM signal is in the range of 5% to 95%, the average voltage of the PWM signal is not changed regardless of whether the control signal is superimposed or not, more preferably, the ratio of the on period of the PWM signal. Is within the range from 5% to a predetermined dimming lower limit, regardless of whether the control signal is superimposed or not, the average voltage of the PWM signal is not changed, thereby illuminating light from the illumination device 11 by superimposing the control signal on the PWM signal. Can be less affected.

  Further, as shown in FIG. 5 (b), a PWM signal superimposed with a control signal to be transmitted in accordance with a remote control signal is superimposed with a control signal to be transmitted regardless of the remote control signal as shown in FIG. 5 (a). Is set shorter than the width of the PWM signal. That is, the PWM signal on which the control signal to be transmitted according to the remote control signal is superimposed is cut for one cycle or several cycles. Then, the control signal is superimposed on the portion of the PWM signal that has been cut to shorten the width. Thus, before the other lighting device 11 other than the specific lighting device 11 to be operated reacts, the transmission of the PWM signal on which the control signal corresponding to the remote control signal is superimposed is completed, and the control signal to the PWM signal is completed. The influence on the illumination light of the other illumination device 11 due to the superimposition of the can be prevented.

  Further, as shown in FIG. 6, the PWM signal on which the control signal transmitted in response to the remote control signal is superimposed is made different from the peak value of the PWM signal on which the control signal transmitted regardless of the remote control signal is superimposed. For example, the peak value of the PWM signal on which the control signal transmitted in response to the remote control signal is superimposed is made smaller than the peak value of the PWM signal on which the control signal transmitted regardless of the remote control signal is superimposed. Thereby, in the illuminating device 11, the PWM signal on which the control signal is superimposed can be easily identified.

  In addition, as a method for transmitting address data from the lighting device 11 to the remote controller 12, an optical communication method in which the address data is transmitted by light such as infrared light other than illumination light, and a radio method in which the address data is transmitted by radio waves are also employed. Although it is possible, the visible light communication system that transmits address data superimposed on light from a light source does not require an infrared oscillator, a radio oscillator, or the like, and the configuration can be simplified.

11 Lighting equipment
12 Remote control
13 Control device
21 Wired signal lines

Claims (7)

Receives a control signal having its own address and including its own address data in a wired manner and a PWM signal on which this control signal is superimposed, and based on the control signal, sends its own address data to a predetermined area with visible light A plurality of lighting devices capable of transmission and dimming based on PWM signals;
A remote controller capable of receiving address data to be transmitted from a lighting device to a predetermined area with visible light and transmitting a remote control signal including the received address data and dimming data;
A control device that receives a remote control signal from a remote controller and is connected to a plurality of lighting devices by wire, and superimposes a control signal including address data of the lighting device on the PWM signal based on the remote control signal and transmits the signal by wire;
A lighting system comprising: 2. The illumination system according to claim 1, wherein the control device uses a control signal to be superimposed on the PWM signal as a pulse signal having a width of 5% or less of one period of the PWM signal. 3. The lighting system according to claim 1, wherein the control device sets the average voltage of the PWM signal when the control signal is superimposed to be the same as the average voltage of the PWM signal when the control signal is not superimposed. . The control device does not change the average voltage of the PWM signal regardless of whether or not the control signal is superimposed when the ratio of the ON period of the PWM signal is within a range of 5% to 95%, and is outside the range of 5% to 95%. The illumination system according to any one of claims 1 to 3, wherein an average voltage of the PWM signal is allowed to change due to superimposition of the control signal. The control device does not change the average voltage of the PWM signal regardless of whether the control signal is superimposed or not within a range from 5% to a predetermined dimming lower limit value of the on period of the PWM signal. The illumination system according to claim 4, wherein the average voltage of the PWM signal is allowed to change due to the superposition of the control signal outside the range up to the dimming lower limit value. The control device sets the PWM signal on which the control signal to be transmitted in accordance with the remote control signal is superimposed to be shorter than the width of the PWM signal on which the control signal to be transmitted is superimposed regardless of the remote control signal. The illumination system according to any one of 5 to 5. The control signal is such that a PWM signal on which a control signal to be transmitted in accordance with a remote control signal is superimposed is different from a peak value of the PWM signal on which a control signal to be transmitted is superimposed regardless of the remote control signal. The illumination system according to any one of 6 to 6.

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