Lighting device and lighting system

Abstract

Lighting device (10a-f) in a mesh net (20), wherein the mesh net (20) comprises the lighting device (10a-f) and other lighting devices (10b-f), wherein the lighting device comprises the following: a device communicator (12) that wirelessly sends and receives a command relating to the actuation of the lighting device (10a-f); and a device control device (13) comprising a first communication mode in which the lighting device (10a-f) and a communication terminal mutually send and receive the command, and a second communication mode in which the lighting device (10a-f) and one of the other lighting devices (10b-f) mutually send and receive the command, wherein the device control device (13) is capable of executing the command received in the first communication mode and the command received in the second communication mode, wherein, when the device communicator (12) receives the command originating from a first communication terminal (50) and affecting several lighting devices (10a-f) (the lighting device (10a-f) and other lighting devices (10b-f)) via one of the other lighting devices (10b-f) in the second communication mode: the device control unit (13) executes the command received in the second communication mode if the device control unit (13) is not communicating in the first communication mode with a second communication terminal (60) that is different from the first communication terminal (50), and maintains a current operating state without executing the command received in the second communication mode if the device control unit (13) is communicating with the second communication terminal (60) in the first communication mode.

Description

[Technical field]

[0001] The present disclosure relates to lighting devices forming a mesh network and a lighting system. [General state of the art]

[0002] Traditionally, lighting systems are known in which multiple lighting devices with a communication function form a mesh network. A mesh network is a network in which multiple devices establish a wireless communication channel among themselves.

[0003] As a lighting system of this type, document JP 2014-60078 A discloses a lighting system including a plurality of lighting devices, each having a wireless device, a plurality of wireless terminals that communicate with the lighting devices, and a management server that manages the lighting devices. In this lighting system, individual adjacent lighting devices can communicate with each other, and the plurality of lighting devices form a mesh network.

[0004] Document US 2013 / 0293118 A1 discloses a lighting device comprising a light emitting unit, a receiving unit for receiving information from an adjacent lighting device and a control unit.

[0005] Document US 2008 / 0 265 799 A1 discloses a network that controls illuminance and pattern in response to light, sound and motion.

[0006] DE 20 2012 104 206 U1 discloses a control system for lighting network, that the system contains some terminal control devices connected to the lighting, the described terminal control device is divided into several groups. [Summary of the invention][Technical problem]

[0007] In the lighting system disclosed in JP 2014-60078 A, a command for operating the lighting devices is sent from the management server to each of the lighting devices through a communication channel of the mesh network. Such transmission of the command through the communication channel of the mesh network enables the individual lighting devices to be operated collectively in a similar manner.

[0008] However, if the individual lighting devices are operated together in a similar manner, the lighting devices may enter an operating state that is not intended by others operating under the current operating state of the lighting devices, thereby adversely affecting current operation in some cases. For example, if the lighting devices are turned off together even if a person is currently working with the lighting devices turned on, problems of disrupting current work may arise and cause inconvenience to the user.

[0009] In view of the foregoing, the present disclosure provides, for example, lighting devices that eliminate an adverse effect on work currently being performed under a current operating condition when the lighting devices are collectively operated through a communication channel of a mesh network. [Solution to the task]

[0010] One aspect of a lighting device according to the present disclosure is a lighting device in a mesh network, the mesh network including the lighting device and other lighting devices. The lighting device includes a device communicator that wirelessly transmits and receives a command related to an operation of the lighting device; and a device controller having a first communication mode in which the lighting device and a communication terminal mutually transmit and receive the command, and a second communication mode in which the lighting device and one of the other lighting devices mutually transmit and receive the command, wherein the device controller is capable of executing the command received in the first communication mode and the command received in the second communication mode.When the device communicator receives the command originating from a first communication terminal and affecting the lighting device and the other lighting devices via one of the other lighting devices in the second communication mode, the device controller executes the command received in the second communication mode when the device controller is not in communication with a second communication terminal different from the first communication terminal in the first communication mode, and maintains a current operating state without executing the command received in the second communication mode when the device controller is in communication with the second communication terminal in the first communication mode.

[0011] Furthermore, an aspect of a lighting system according to the present disclosure includes the plurality of lighting devices. [Advantageous effects of the invention]

[0012] For example, it is possible to provide lighting devices that eliminate an adverse effect on work performed under a current operating condition when the lighting devices are operated jointly through a communication channel of a mesh network. [Brief description of the drawings] Fig. 1 illustrates a lighting system and a plurality of lighting devices according to Embodiment 1, with an example of a mesh network formed by the plurality of lighting devices; Fig. 2 illustrates an example of an external appearance of each of the lighting devices according to Embodiment 1; Fig. 3 is a block diagram illustrating a control configuration of each of the lighting devices according to Embodiment 1; Fig. 4 is a block diagram illustrating a control configuration of a communication terminal that communicates with the lighting devices according to Embodiment 1; Fig. 5 illustrates lighting states of the lighting devices in Embodiment 1, including (a) an illustration of a state in which the lighting devices constituting the mesh network have all been turned on, and (b) an illustration of a case in which a turn-off command is supplied to the individual lighting devices; Fig. 6 is a flowchart for determining whether to turn on or off the lighting devices in Embodiment 1; Fig. 7 illustrates lighting states of a plurality of lighting devices in Embodiment 2 in a case where a turn-off command is supplied to the lighting devices constituting a mesh network; and Fig. 8 is a flowchart for determining whether to turn on or off the lighting devices in Embodiment 2. [Description of embodiments]

[0013] In the following, lighting devices and a lighting system according to embodiments will be described with reference to the accompanying drawings. It should be noted that each of the embodiments described below illustrates a specific preferred example of the present disclosure. Therefore, the numerical values, shapes, materials, structural components, arrangement, and connection of the structural components mentioned in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the structural components in the following embodiments, the one not recited in an independent claim defining the broadest spirit of the present disclosure will be described as any structural component.

[0014] Furthermore, each of the figures is a schematic view and is not necessarily illustrated in an accurate manner. Furthermore, in each of the figures, substantially the same structures are assigned the same reference numerals, and redundant descriptions of such structures are omitted or simplified. [Embodiment 1]Design of lighting system and lighting devices

[0015] Fig. 1 illustrates a lighting system 100 and a plurality of lighting devices 10a, 10b, 10c, 10d, 10e and 10f according to Embodiment 1 with an example of the mesh network 20 (in Fig. 1 with dashed lines), which is formed by the lighting devices 10a to 10f.

[0016] The lighting system 100 includes a plurality of lighting devices 10a to 10f that have a communication function. In this lighting system 100, adjacent ones of the plurality of lighting devices 10a to 10f (for example, the lighting devices 10b and 10d) communicate with each other to establish a wireless communication channel, thereby forming a mesh network. Note that this mesh network 20 may not necessarily be formed between the adjacent lighting devices, but rather between the lighting devices that are a predetermined number of hops apart from each other within a wireless communication range.

[0017] Furthermore, the lighting devices 10a to 10f can communicate with the communication terminals 50 and 60 (first communication terminal 50 and second communication terminal 60), each of which is operated by multiple users. The communication terminals 50 and 60 are configured to automatically connect communicatively to the lighting devices 10a to 10f located in their vicinity. Fig. 1, the communication terminal 50 is communicatively connected to the lighting device 10a and the communication terminal 60 is communicatively connected to the lighting device 10d.

[0018] Fig. 2 illustrates an example of an external appearance of each of the lighting devices 10a to 10f. Fig. 3 is a block diagram illustrating a control configuration of each of the lighting devices 10a to 10f.

[0019] Each of the lighting devices 10a to 10f is, for example, a ceiling light as shown in Fig. 2, and installed in a building material (ceiling) of a house or the like. The lighting devices 10a to 10f each include a device main body 15 and a bell 16 covering the main body 15. The bell 16 is formed of a translucent resin material. As shown in Fig. 3, the device main body 15 includes the light source 11, the device communicator 12, and the device controller 13.

[0020] The light source 11 comprises a plurality of light-emitting diodes that emit, for example, white light, red light, green light, or blue light. The device controller 13 controls the dimming and / or tinting of the light source 11.

[0021] The device communicator 12 includes an antenna and a wireless communication circuit. The device communicator 12 of one lighting device wirelessly sends and receives a command concerning the operations of the lighting devices 10a to 10f to and from the device communicator 12 of another lighting device. For example, the lighting device 10b can communicate with the lighting devices 10a, 10d, and 10e adjacent to the lighting device 10b. Furthermore, the device communicator 12 of each of the lighting devices 10a to 10f can also communicate with the communication terminal 50 or 60. The system of such communication can include, for example, a system for communicating in a 2.4 GHz frequency band, such as Bluetooth (registered trademark) under IEEE 802.15.1 standards.

[0022] The device controller 13 includes a CPU, a RAM, and a ROM that stores a program. The CPU executes the program stored in the RAM so that the controller 13 performs the control and functions described herein. The device controller 13 has multiple communication modes (first communication mode M1 and second communication mode M2) for communicating with other lighting devices via the device communicator 12. The first communication mode M1 is a communication mode in a case where each of the lighting devices 10a to 10f and the communication terminal 50 or 60 communicate with each other. The second communication mode M2 ​​is a communication mode in a case where a plurality of lighting devices 10a to 10f constituting the mesh network 20 send and receive the command from each other.The device controller 13 can send and receive the command using both the first communication mode M1 and the second communication mode M2 ​​at the same time. The device controller 13 executes the command received in the first communication mode M1 and the command received in the second communication mode M2 ​​according to the usage conditions of the lighting devices 10a to 10f.

[0023] Fig. 4 is a block diagram illustrating a control configuration of each of the communication terminals 50 and 60 that communicate with the lighting devices 10a to 10f.

[0024] Each of the communication terminals 50 and 60 is, for example, a tablet terminal or a smartphone and includes the operation button 54, the display 51, the terminal communicator 52, and the terminal controller 53.

[0025] The operation button 54 is, for example, a touch-sensitive screen for inputting a command to operate the lighting devices 10a to 10f. The display 51 is, for example, a liquid crystal monitor for displaying an operating state of each of the lighting devices 10a to 10f and whether or not the lighting devices 10a to 10f should enter the mesh network 20. The terminal communicator 52 includes an antenna and a wireless communication circuit. The terminal controller 53 includes a CPU, a RAM, and a ROM. The terminal controller 53 executes a program stored in the ROM, which causes the controller to perform the functions and control described herein. The terminal controller 53 operates in the first communication mode M1 to communicate with each of the lighting devices 10a to 10f.

[0026] Commands related to the operations of the lighting devices 10a to 10f, such as turning on, turning off, dimming, tinting, and resetting, are sent and received between the communication terminals 50 and 60 and the lighting devices 10a to 10f in the first communication mode M1, and among the lighting devices 10a to 10f in the second communication mode M2, respectively. Further, in addition to these commands, authentication information items such as an address assigned to each of the lighting devices 10a to 10f and a network encryption key are sent and received between the communication terminals 50 and 60 and the lighting devices 10a to 10f, and among the lighting devices 10a to 10f.

[0027] For example, by sending the command related to the operation of the lighting device 10b while simultaneously designating the address, it is possible to operate the lighting device 10b alone. Furthermore, by assigning the address to the plurality of lighting devices 10a to 10f as a group, it is possible to collectively operate a group consisting of the lighting devices 10a to 10f. In addition, a predetermined one or all of the on, off, dimming, tinting, and reset commands may be set in advance so that the lighting devices 10a to 10f are collectively operated.

[0028] In principle, these commands are sent from the communication terminal 50 or 60 and affect multiple lighting devices 10a to 10f through communication channels of the mesh network 20. For example, if a predetermined command is sent from the communication terminal 50 to the lighting device 10a in the first communication mode M1, the lighting device 10a sends the received command to the lighting device 10b in the second communication mode M2. The lighting device 10b not only executes the received command but also sends this command to the lighting devices 10d and 10e in the second communication mode M2.

[0029] Meanwhile, in the present embodiment, the lighting devices 10a to 10f communicating in the first communication mode M1 are set to ignore the command received from other lighting devices and not execute it. For example, the lighting device 10d communicating with the communication terminal 60 in the first communication mode M1 does not execute the command received from the communication terminal 50 in the second communication mode M2 ​​and maintains a current operation state. Furthermore, even though the lighting device 10a accepts the command received in the first communication mode M1 once, it does not execute the command but maintains the current operation state because it is in direct communication with the communication terminal 50 in the first communication mode M1.

[0030] In other words, in the lighting devices 10a to 10f according to the present embodiment, when the lighting devices 10a to 10f are to be operated jointly, it is taken into account that people are working in a current operating state of the lighting devices communicating in the first communication mode M1 (for example, the lighting devices 10a and 10d), and therefore this operating state is maintained. In this way, an adverse effect on work is eliminated. Operating lighting devices

[0031] Now, with reference to Fig. 5 and Fig. 6 describes how a plurality of lighting devices 10a to 10f forming a mesh network 20 are operated when a turn-off command is delivered to the lighting devices 10a to 10f. Here, the description is directed to a case where a person working near the lighting device 10a turns off other lighting devices 10b to 10f to save power.

[0032] Fig. 5 illustrates illumination states of lighting devices 10a to 10f and Fig. 6 is a flowchart for determining whether the lighting devices 10a to 10f are to be turned on or off.

[0033] First, as in (a) of Fig. 5, the plurality of lighting devices 10a to 10f forming the mesh network 20 are all switched on (S11 in Fig. 6).

[0034] Used in this state as in (b) of Fig. 5 illustrates, a person working near the lighting device 10a uses the communication terminal 50 to send a turn-off command to the lighting device 10a for the purpose of turning off other lighting devices 10b to 10f.

[0035] First, the operation of the lighting device 10a, which has received the turn-off command directly from the communication terminal 50, will be described with reference to Fig. 6 described.

[0036] The lighting device 10a receives the switch-off command from the communication terminal 50 in the first communication mode M1 (S12 in Fig. 6). Thereafter, the lighting device 10a determines whether it is connected to any communication terminal in the first communication mode M1 (S13 in Fig. 6) is in communication. At this time, the lighting device 10a once accepts the off-command received in the first communication mode M1. Meanwhile, since the lighting device 10a is in communication with the communication terminal 50 in the first communication mode M1 (Yes in S13), the lighting device 10a does not execute the off-command received in the first communication mode M1 but maintains the current operating state. At the same time, the lighting device 10a transmits the off-command to the lighting devices 10b and 10c adjacent to the lighting device 10a in the second communication mode M2. Otherwise, the lighting device 10a remains on until it receives another off-command.

[0037] Now, the operation of the lighting devices 10b to 10f that have received the turn-off command via a lighting device different from them will be explained also with reference to Fig. 6 described.

[0038] The lighting devices 10b and 10c each receive the switch-off command from the lighting device 10a in the second communication mode M2 ​​(S12 in Fig. 6). Thereafter, the lighting devices 10b and 10c determine whether they are connected to any communication terminal in the first communication mode M1 (S13 in Fig. 6) are in communication. At this time, the lighting devices 10b and 10c are not in communication with any communication terminal in the first communication mode M1 (No in S13) and therefore both execute the switch-off command received in the second communication mode M2 ​​(S14 in Fig. 6). Simultaneously, the lighting devices 10b and 10c transmit the switch-off commands to the lighting devices 10d, 10e, and 10f adjacent to the lighting devices 10b and 10c in the second communication mode M2.

[0039] The lighting devices 10d, 10e and 10f receive the switching-off commands from the lighting devices 10b and 10c in the second communication mode M2 ​​(S12 in Fig. 6). Thereafter, the lighting devices 10d, 10e and 10f determine whether they are communicating with any communication terminal in the first communication mode M1 (S13 in Fig. 6) are in communication. At this time, the lighting devices 10e and 10f are not in communication with any communication terminal in the first communication mode M1 (No in S13) and therefore both execute the switch-off command received in the second communication mode M2 ​​(S14 in Fig. 6).

[0040] On the other hand, the lighting device 10d is communicating with the communication terminal 60 in the first communication mode M1 (Yes in S13), and thus ignores the off-command received in the second communication mode M2 ​​and does not execute it to maintain the current operating state. Furthermore, the lighting device 10d also notifies the communication terminal 50 via response information that the received off-command is not to be executed by causing this response information to appear. The communication terminal 50 is notified of this response information using the second communication mode M2 ​​used in the communication channels in the mesh network 20 and the first communication mode M1 used in the communication channel between the lighting device 10a and the communication terminal 50.

[0041] In other words, in the lighting devices 10a to 10f according to the present embodiment, as shown in (b) of Fig. 5 illustrates that even when a person working near the lighting device 10a uses the communication terminal 50 to deliver a turn-off command to the lighting devices 10a to 10f together, the lighting devices 10a and 10d located near the communication terminals 50 and 60 are set not to be turned off. Brief description

[0042] As described above, in the lighting devices 10a to 10f according to the present embodiment, when the device communicator 12 receives a command originating from the first communication terminal 50 and affecting a plurality of lighting devices 10a to 10f via a lighting device different from the lighting device including this device communicator 12 in the second communication mode M2, the device controller 13 executes the command received in the second communication mode M2 ​​when the lighting device including this device controller 13 is not in communication with the second communication terminal 60 different from the first communication terminal 50 in the first communication mode M1, and maintains the current operation state without executing the command received in the second communication mode M2 ​​when the lighting device,which comprises this device control device 13, is in communication with the second communication terminal 60 in the first communication mode M1.,

[0043] Thus, in the case of jointly operating the lighting devices 10a to 10f using the communication channel of the mesh network 20 with the first communication terminal 50 serving as the originator, it is possible to prevent an adverse effect on work under a lighting device located near the second communication terminal 60 (lighting device 10d in (b) of Fig. 5), to suppress.

[0044] In the present embodiment, the state of “being in communication in the first communication mode M1” includes not only a period in which a command is sent and received in the first communication mode M1, but also a session from the time the communication terminal 50 or 60 and the lighting devices 10a to 10f are connected in the first communication mode M1 until the time they are disconnected.

[0045] Further, for example, when the device communicator 12 in the lighting device 10a receives a command originating from the first communication terminal 50 and affecting a plurality of lighting devices 10a to 10f from the first communication terminal 50 in the first communication mode M1, the device controller 13 may not only maintain the current operation state without executing the command received in the first communication mode M1, but also transmit the command to the lighting devices 10b to 10f other than the lighting device 10a in the second communication mode M2.

[0046] This makes it possible to both maintain the current operating state of the lighting device 10a located near the first communication terminal 50 and cause the other lighting devices 10b, 10c, 10e, and 10f to execute the command together. Furthermore, even if the command is inadvertently delivered to the lighting device 10a, the lighting device 10a maintains the current operating state, so that an adverse effect on current work under the lighting device 10a can be suppressed.

[0047] Moreover, when the device controller 13 does not execute the command received in the second communication mode M2, the device controller 13 may notify the first communication terminal 50 of the information that the command is not to be executed.

[0048] Thus, the information notified to the first communication terminal 50 provides detection that another lighting device is present that may interfere with the current work when the command is executed, and thus the command has not been executed in that lighting device.

[0049] Furthermore, the lighting system 100 according to the present embodiment comprises a plurality of lighting devices 10a to 10f.

[0050] With this lighting system 100, in the case of jointly operating the lighting devices 10a to 10f through the communication channel of the mesh network 20 with the communication terminal 50 serving as the originator, it is possible to suppress an adverse effect on a work under the lighting device 10d located near the communication terminal 60. [Embodiment 2]Design of lighting system and lighting devices

[0051] In the lighting system 100 according to Embodiment 2, the lighting devices 10a to 10f that have received a command directly from the communication terminal 50 are set to follow this command.

[0052] For example, when the device communicator 12 in the lighting device 10a receives a command originating from the first communication terminal 50 and affecting a plurality of lighting devices 10a to 10f from the first communication terminal 50 in the first communication mode M1, the device controller 13 is configured not only to execute the command received in the first communication mode M1, but also to transmit this command to the lighting devices 10b to 10f, which are different from the lighting device 10a, in the second communication mode M2. Operating lighting devices

[0053] With reference to Fig. 7 and Fig. 8 follows a description of the operation of a plurality of lighting devices 10a to 10f when a command to turn off the lighting devices 10a to 10f is delivered. Note that the description here is directed to a case where a person who has been working on a floor where the lighting devices 10a to 10f are installed finishes work there and therefore turns off all the lighting devices 10a to 10f.

[0054] Fig. 7 illustrates illumination states of illumination devices 10a to 10f and Fig. 8 is a flowchart for determining whether the lighting devices 10a to 10f are to be turned on or off.

[0055] First, the plurality of lighting devices 10a to 10f forming the mesh network 20 were all turned on (S21 in Fig. 8).

[0056] Used in this state as in Fig. 7 illustrates, a person working near the lighting device 10a uses the communication terminal 50 to send a turn-off command to the lighting device 10a for the purpose of turning off all of the lighting devices 10a to 10f.

[0057] First, the operation of the lighting device 10a, which has received the turn-off command directly from the communication terminal 50, will be described with reference to Fig. 8 described.

[0058] The lighting device 10a receives the switch-off command from the communication terminal 50 in the first communication mode M1 (S22 in Fig. 8). Thereafter, the lighting device 10a determines whether it is connected to any communication terminal in the first communication mode M1 (S23 in Fig. 8) is in communication. At this time, the lighting device 10a is in communication with the communication terminal 50 in the first communication mode M1 (Yes in S23) and therefore executes the switch-off command received in the first communication mode M1 (S25 in Fig. 8). At the same time, the lighting device 10a transmits the switch-off command in the second communication mode M2 ​​to the lighting devices 10b and 10c adjacent to it.

[0059] Now, the operation of the lighting devices 10b to 10f that have received the turn-off command via a lighting device different from them will be explained also with reference to Fig. 8 described.

[0060] The lighting devices 10b and 10c each receive the switch-off command from the lighting device 10a in the second communication mode M2 ​​(S22 in Fig. 8). Therefore, the lighting devices 10b and 10c determine whether the turn-off command has been received in the first communication mode M1 or not (S23 in Fig. 8). The lighting devices 10b and 10c have not received the turn-off command in the first communication mode M1, but have received it in the second communication mode M2. Therefore, the operation proceeds to the next step, and the lighting devices 10b and 10c determine whether they are communicating with any communication terminal in the first communication mode M1 (S24 in Fig. 8) are in communication. At this time, the lighting devices 10b and 10c are not in communication with any communication terminal in the first communication mode M1 (No in S24) and therefore both execute the switch-off command received in the second communication mode M2 ​​(S25 in Fig. 8). At the same time, each of them transmits the switch-off command in the second communication mode M2 ​​to the adjacent lighting devices 10d, 10e, and 10f.

[0061] The lighting devices 10d, 10e and 10f receive the switch-off command from the lighting devices 10b and 10c in the second communication mode M2 ​​(S22 in Fig. 8). Therefore, the lighting devices 10d, 10e and 10f determine whether the turn-off command has been received in the first communication mode M1 or not (S23 in Fig. 8). The lighting devices 10d, 10e, and 10f have not received the turn-off command in the first communication mode M1 (No in S23) but in the second communication mode M2. Therefore, the operation proceeds to the next step, and the lighting devices 10d, 10e, and 10f determine whether they are communicating with any communication terminal in the first communication mode M1 (S24 in Fig. 8) are in communication.

[0062] At this time, the lighting devices 10e and 10f are not in communication with any communication terminal in the first communication mode M1 (No in S24) and therefore both execute the turn-off command received in the second communication mode M2 ​​(S25 in Fig. 8).

[0063] On the other hand, the lighting device 10d communicates with the communication terminal 60 in the first communication mode M1 (Yes in S24), and thus ignores the off command received in the second communication mode M2 ​​and does not execute it to maintain the current operating state. Furthermore, the lighting device 10d also notifies the communication terminal 50 via response information that the received off command is not to be executed by causing this response information to appear.

[0064] In other words, in the lighting devices 10a to 10f according to the present embodiment, as shown in Fig. 7 illustrates that even when a person working near the lighting device 10a uses the communication terminal 50 to collectively deliver a turn-off command to the lighting devices 10a to 10f, the lighting device 10d located near the communication terminal 60 is set not to be turned off. Brief description

[0065] As described above, in the lighting devices 10a to 10f according to the present embodiment, when the device communicator 12 receives a command originating from the first communication terminal 50 in the second communication mode M2 ​​via a lighting device different from the lighting device including this device communicator 12, the device controller 13 executes the command received in the second communication mode M2 ​​when the lighting device including this device controller 13 is not in communication with the second communication terminal 60 in the first communication mode M1, and maintains the current operation state without executing the command received in the second communication mode M2 ​​when the lighting device including this device controller 13is in communication with the second communication terminal 60 in the first communication mode M1.

[0066] Thus, in the case of jointly operating the lighting devices 10a to 10f through the communication channel of the mesh network 20 with the first communication terminal 50 serving as the originator, it is possible to suppress an adverse effect on work under a lighting device located near the second communication terminal 60 (lighting device 10d in Fig. 7).

[0067] Further, for example, when the device communicator 12 in the lighting device 10a receives a command originating from the first communication terminal 50 and affecting a plurality of lighting devices 10a to 10f from the first communication terminal 50 in the first communication mode M1, the device controller 13 of the lighting device 10a can not only execute the command received in the first communication mode M1 but also transmit the command to the lighting devices 10b to 10f other than the lighting device 10a in the second communication mode M2.

[0068] This makes it possible to cause the lighting device 10a located near the first communication terminal 50, as well as other lighting devices 10b, 10c, 10e and 10f (except the lighting device 10d located in Fig. 7) execute the command.

[0069] Furthermore, the lighting system 100 according to the present embodiment comprises a plurality of lighting devices 10a to 10f.

[0070] With this lighting system 100, in the case of jointly operating the lighting devices 10a to 10f through the communication channel of the mesh network 20 with the communication terminal 50 serving as the originator, it is possible to suppress an adverse effect on a work under the lighting device 10d located near the communication terminal 60.

[0071] The foregoing description is directed to embodiments of lighting devices 10a to 10f and the lighting system 100. However, the present disclosure is not limited to the foregoing embodiments. For example, the present disclosure covers a mode achieved by making various modifications that those skilled in the art can devise to the foregoing embodiments, and a mode that can be achieved by any combination of the structural components and functions in the embodiments, as long as the spirit of the present disclosure is not deviated.

[0072] Although the lighting devices 10a to 10f are operated by the command from the communication terminal 50 in Embodiment 1, for example, there is no particular limitation. The lighting devices 10a to 10f can be operated by a command from the communication terminal 60 in the first communication mode M1. Furthermore, a management server that manages the lighting devices 10a to 10f can be provided in the lighting system 100, and the lighting devices 10a to 10f can be operated by a command from the management server using the first communication mode.

[0073] Furthermore, although the lighting device 10d and the communication terminal 60 are communicatively connected to each other in Embodiments 1 and 2, there is no particular limitation in this regard. It may also be possible to provide a roaming function in the communication terminal 60 and enable the communicative connection of the communication terminal 60 that has been moved and other lighting devices 10b, 10c, 10e, and 10f to each other in the first communication mode M1. Furthermore, the communicative connection is not necessarily accomplished automatically, but may be accomplished by manually operating the communication terminals 50 and 60.

[0074] Furthermore, although the description in Embodiment 1 focused on an example of a short-range wireless communication system using Bluetooth (registered trademark), there is no particular limitation. It is also possible to use communication systems such as WiFi (registered trademark), infrared communication, Wi-SUN (registered trademark), or Zigbee.

[0075] Furthermore, although the description in Embodiment 1 is directed to an example in which the ceiling lamp is used as the lighting devices 10a to 10f, there is no particular limitation in this regard. A light-emitting diode (LED) base lamp or an LED ceiling spotlight, or other types of lighting, may also be used without departing from the intended scope of the present disclosure. [List of reference symbols] 10a, 10b, 10c, 10d, 10e, 10f Lighting device 12 Device Communicator 13 Device control device 20 mesh net 50 first communication device 60 second communication terminal 100 lighting system M1 first communication mode M2 second communication mode

Claims

[1] Lighting device (10a-f) in a mesh network (20), the mesh network (20) comprising the lighting device (10a-f) and other lighting devices (10b-f), the lighting device comprising: a device communicator (12) that wirelessly sends and receives a command relating to an actuation of the lighting device (10a-f); and a device control device (13) having a first communication mode in which the lighting device (10a-f) and a communication terminal mutually send and receive the command, and a second communication mode in which the lighting device (10a-f) and one of the other lighting devices (10b-f) mutually send and receive the command, wherein the device control device (13) is capable of executing the command received in the first communication mode and the command received in the second communication mode, wherein, when the device communicator (12) receives the command originating from a first communication terminal (50) and affecting a plurality of lighting devices (10a-f) (the lighting device (10a-f) and other lighting devices (10b-f)) via one of the other lighting devices (10b-f) in the second communication mode: the device control device (13) executes the command received in the second communication mode when the device control device (13) is not in communication with a second communication terminal (60) different from the first communication terminal (50) in the first communication mode, and maintains a current operating state without executing the command received in the second communication mode when the device control device (13) is in communication with the second communication terminal (60) in the first communication mode. [2] The lighting device (10a-f) according to claim 1, wherein, when the device communicator (12) receives the command originating from the first communication terminal (50) and affecting the plurality of lighting devices (10a-f) (the lighting device (10a-f) and the other lighting devices (10b-f)) from the first communication terminal (50) in the first communication mode: the device control means (13) maintains the current operating state without executing the command received in the first communication mode, and transmits the command to one of the other lighting devices (10b-f) in the second communication mode. [3] The lighting device (10a-f) according to claim 1, wherein, when the device communicator (12) receives the command originating from the first communication terminal (50) and affecting the plurality of lighting devices (10a-f) (the lighting device (10a-f) and the other lighting devices (10b-f)) from the first communication terminal (50) in the first communication mode: the device control means (13) executes the command received in the first communication mode and transmits the command in the second communication mode to one of the plurality of lighting devices (10a-f) different from the lighting device (10a-f). [4] The lighting device (10a-f) according to any one of claims 1 to 3, wherein, when the device control means (13) does not execute the command received in the second communication mode, the device control means (13) notifies the first communication terminal (50) of the information that the command is not to be executed. [5] Lighting device (10a-f) according to one of claims 1 to 4, wherein the command is a switch-off command for switching off the lighting device (10a-f). [6] Lighting system (100) comprising: the plurality of lighting devices (10a-f) according to one of claims 1 to 5.

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