Illumination system, lighting apparatus, control method, and program

Abstract

To provide an illumination system capable of preventing the timing lag among multiple lighting apparatuses to shift into a dimming status.SOLUTION: An illumination system 10 includes: multiple lighting apparatuses 20; and an illumination control device 30 that transmits via radio a control signal to multiple lighting apparatuses 20 upon detecting a person. Each of the multiple lighting apparatuses 20 is configured to shift into a first dimming status based on the received control signal, to start count of control retention time, during the period from the second timing immediately before the first timing when the control retention time count ends to the first timing, transmit via radio a notification signal to the other lighting apparatuses 20 to notify that the control retention time count is about to end, and to shift into second dimming status darker than the first dimming status from a first dimming status at the first timing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lighting system, a lighting fixture, a control method, and a program. [Background technology]

[0002] There is known a technology for controlling lighting fixtures using a human presence sensor. In the lighting control system described in Patent Document 1, when a human body detection sensor detects a person, the lighting fixture is turned on with 100% light output and a control signal is transmitted to the adjacent lighting fixture via a signal line, so that the adjacent lighting fixture is turned on with 50% light output. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-283282 Summary of the Invention [Problem to be solved by the invention]

[0004] In a lighting system using a motion sensor, when the motion sensor detects a person, each of the multiple lighting fixtures generally goes into a bright dimmed state and returns to a dimmed state after a predetermined time has passed. Here, if each of the multiple lighting fixtures counts the predetermined time, there may be a discrepancy in the timing at which the multiple lighting fixtures go into a dimmed state.

[0005] The present invention provides a lighting system and the like that can reduce the lag in timing at which a plurality of lighting fixtures enter a dim dimming state. [Means for solving the problem]

[0006] A lighting system according to one embodiment of the present invention includes a plurality of lighting fixtures and a lighting control device that wirelessly transmits control signals to the plurality of lighting fixtures upon detecting a person, wherein each of the plurality of lighting fixtures transitions to a first dimming state based on the received control signal and starts counting a control hold time, wirelessly transmits a notification signal to the other lighting fixtures to notify them that counting of the control hold time will end between a second timing immediately before a first timing at which counting of the control hold time ends and the first timing, and transitions from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing.

[0007] A lighting device according to one embodiment of the present invention comprises a light source, a wireless communication unit that receives a control signal wirelessly transmitted by a lighting control device when it detects a person, and an information processing unit that controls the light source to a first dimming state based on the received control signal and starts counting a control hold time, wherein the information processing unit wirelessly transmits a notification signal to other lighting devices using the wireless communication unit to notify them that counting of the control hold time will end, between a second timing immediately before a first timing at which counting of the control hold time ends and the first timing, and controls the light source from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing.

[0008] A control method according to one aspect of the present invention is a control method executed by a lighting fixture, and includes the steps of receiving a control signal wirelessly transmitted when a lighting control device detects a person, controlling a light source provided in the lighting fixture to a first dimming state based on the received control signal and starting counting a control hold time, wirelessly transmitting a notification signal to other lighting fixtures to notify them that counting of the control hold time will end, between a second timing immediately before a first timing at which counting of the control hold time ends and the first timing, and controlling the light source from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing.

[0009] A program according to one aspect of the present invention is a program for causing the lighting device to execute the control method. Effect of the Invention

[0010] The lighting system etc. of the present invention can reduce the lag in the timing at which a plurality of lighting fixtures enter a dim dimming state. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing a functional configuration of a lighting system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing an indoor space to which the lighting system according to the embodiment is applied. [Diagram 3] FIG. 3 is a sequence diagram of a first operation example of the lighting system according to the embodiment. [Figure 4] FIG. 4 is a sequence diagram of a second operation example of the lighting system according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. In addition, among the components in the following embodiments, components that are not described in the independent claims will be described as optional components.

[0013] In addition, each drawing is a schematic diagram and is not necessarily a precise illustration. In addition, in each drawing, the same reference numerals are used for substantially the same configuration, and duplicated explanations may be omitted or simplified.

[0014] (Embodiment) [composition] First, the configuration of a lighting system according to an embodiment will be described. FIG. 1 is a block diagram showing a functional configuration of a lighting system according to an embodiment. FIG. 2 is a diagram showing an indoor space to which a lighting system according to an embodiment is applied. As shown in FIGS. 1 and 2, a lighting system 10 includes a plurality of lighting fixtures 20 and a lighting control device 30. The number of the plurality of lighting fixtures 20 included in the lighting system 10 is not particularly limited. It is sufficient that the lighting system 10 includes at least one lighting fixture 20.

[0015] Illumination device 20 is a base light or the like that is installed on the ceiling of indoor space 50 and illuminates indoor space 50. The form of illumination device 20 is not particularly limited, and may be a ceiling light, a downlight, a spotlight, or the like. Illumination device 20 specifically includes wireless communication unit 21, light source 22, information processing unit 23, and storage unit 24.

[0016] Wireless communication unit 21 is a wireless communication circuit that enables lighting fixture 20 to perform wireless communication (more specifically, radio wave communication) with lighting control device 30. Specifically, wireless communication unit 21 performs wireless communication in accordance with a communication standard such as BLE (Bluetooth (registered trademark) Low Energy), Wi-Fi (registered trademark), or Zigbee (registered trademark), but the communication standard is not particularly limited.

[0017] The light source 22 irradiates white light into the indoor space 50 so that the lighting device 20 illuminates the indoor space 50. The light source 22 is realized by, for example, an LED (Light Emitting Diode) element, but may be realized by other light emitting elements such as a semiconductor laser, an organic EL (Electro-Luminescence), or an inorganic EL.

[0018] Information processing unit 23 performs light emission control of lighting device 20 (light source 22). Light emission control includes on / off control, dimming control, color adjustment control, and light distribution control. Information processing unit 23 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit. The functions of information processing unit 23 are realized by hardware such as a microcomputer or processor constituting information processing unit 23 executing a computer program (software) stored in storage unit 24.

[0019] The storage unit 24 is a storage device that stores various information necessary for the information processing unit 23 to execute light emission control, such as a computer program executed by the information processing unit 23. The storage unit 24 is realized by, for example, a semiconductor memory.

[0020] The lighting control device 30 is a lighting control device integrated with a human presence sensor 31. The lighting control device 30 is installed on a ceiling or a wall of an indoor space 50, and controls lighting fixtures 20 when it detects a person. The lighting control device 30 includes the human presence sensor 31, a wireless communication unit 32, an information processing unit 33, and a memory unit 34.

[0021] The human presence sensor 31 detects a person located in the indoor space 50. The human presence sensor 31 is realized by, for example, a pyroelectric sensor (infrared sensor) that detects infrared rays emitted from a human body. The human presence sensor 31 may also be realized by an image sensor (camera) that captures an image of the indoor space 50.

[0022] The wireless communication unit 32 is a wireless communication circuit that enables the lighting control device 30 to perform wireless communication (more specifically, radio wave communication) with multiple lighting fixtures 20. Specifically, the wireless communication unit 32 performs wireless communication in accordance with a communication standard such as BLE, Wi-Fi (registered trademark), or Zigbee (registered trademark), but the communication standard is not particularly limited.

[0023] The information processing unit 33 performs information processing for controlling the lighting device 20 when a person is detected by the motion sensor 31. The information processing unit 33 is realized by, for example, a microcomputer, but may also be realized by a processor or a dedicated circuit. The functions of the information processing unit 33 are realized by hardware such as a microcomputer or a processor constituting the information processing unit 33 executing a computer program (software) stored in the storage unit 34.

[0024] The storage unit 34 is a storage device that stores various information used by the information processing unit 33, such as computer programs executed by the information processing unit 33. The storage unit 34 is realized by, for example, a semiconductor memory.

[0025] [Example 1] Next, a first operation example of lighting system 10 will be described. Fig. 3 is a sequence diagram of the first operation example of lighting system 10. Note that Fig. 3 describes a case where there are three lighting fixtures 20 as an example, and in the following description of the first operation example, when distinguishing between the lighting fixtures 20, they will be referred to as lighting fixture 20a, lighting fixture 20b, or lighting fixture 20c.

[0026] Each of the lighting devices 20 is initially in the second dimming state (S11a, S11b, and S11c). The second dimming state is, for example, an off state (dimming rate of 0%), but may also be a dimming rate of 20%. The second dimming state is a relatively dark dimming state.

[0027] When a person is detected by the motion sensor 31 (S12), the information processing unit 33 of the lighting control device 30 wirelessly transmits a control signal to the multiple lighting devices 20 to transition the multiple lighting devices 20 to the first dimming state for a control hold time (predetermined time) (S13). Specifically, the information processing unit 33 wirelessly transmits the control signal to the multiple lighting devices 20 using the wireless communication unit 32. The first dimming state is a dimming state that is brighter than the second dimming state. The first dimming state is, for example, a dimming rate of 100%, but may also be a dimming rate of 80%, for example.

[0028] 3, arrows are drawn to indicate that the control signal is transmitted from lighting control device 30 to each of the multiple lighting fixtures 20, but the control signal may be transmitted in any manner in step S13. For example, the multiple lighting fixtures 20 and lighting control device 30 may form a wireless mesh network, and the control signal transmitted by lighting control device 30 may be relayed to lighting fixture 20a and received by lighting fixture 20b.

[0029] Each of the plurality of lighting devices 20 receives the control signal using wireless communication unit 21. Each of the plurality of lighting devices 20 transitions from the second dimming state to the first dimming state based on the received control signal (S14a, S14b, and S14c). More specifically, information processing unit 23 of each of the plurality of lighting devices 20 controls light source 22 to transition from the second dimming state to the first dimming state based on the received control signal.

[0030] Furthermore, information processor 23 of each of lighting devices 20 starts counting the control hold time defined in the received control signal (S15a, S15b, and S15c). The length of the control hold time is, for example, from several tens of seconds to several tens of minutes, but is not particularly limited. Note that the transition from the second dimming state to the first dimming state and the start of counting the control hold time are triggered by the reception of the control signal.

[0031] When the information processor 23 of each of the lighting devices 20 finishes counting the control retention time (S16a, S16b, and S16c), it controls the light source 22 to change from the first dimming state to the second dimming state. Each of the lighting devices 20 transitions from the first dimming state to the second dimming state (S17a, S17b, and S17c). Note that the count value is reset (initialized) when the counting ends.

[0032] In this way, when the motion sensor 31 detects a person, the lighting system 10 transitions the multiple lighting devices 20 to the first dimming state for the control retention time (predetermined period), and then controls the multiple lighting devices 20 to return to the second dimming state, which is darker than the first dimming state, after the control retention time has elapsed. In other words, when the motion sensor 31 detects a person, the lighting system 10 can cause the multiple lighting devices 20 to emit light brightly only for the control retention time.

[0033] [Example 2] In operation example 1, because information processing unit 23 of each of the multiple lighting devices 20 counts the control retention time, there is a possibility that the counts will vary and there will be a shift in the timing at which the multiple lighting devices 20 change from the first dimming state to the second dimming state. It is believed that the longer the control retention time, the more noticeable the shift in timing will be.

[0034] Therefore, a description will be given of an operation example 2 that can suppress lag in the timing at which the plurality of lighting devices 20 change from the first dimming state to the second dimming state. Fig. 4 is a sequence diagram of the operation example 2 of the lighting system 10. Note that Fig. 4 describes, as an example, a case in which the plurality of lighting devices 20 is three, and in the following description of the operation example 2, when distinguishing between the plurality of lighting devices 20, they will be referred to as lighting device 20a, lighting device 20b, or lighting device 20c.

[0035] The processes from step S11 to steps S15a, S15b, and S15c are the same as those in the first operation example.

[0036] Here, in operation example 2, each of the multiple lighting devices 20 has a function of wirelessly transmitting a notification signal to the other lighting devices 20 to notify them that the control hold time count will end, X seconds before the end of the control hold time count.

[0037] 4, because the counting of lighting fixture 20b is scheduled to end earliest among the multiple lighting fixtures 20, information processing unit 23 of lighting fixture 20b wirelessly transmits a notification signal to lighting fixture 20a and lighting fixture 20c X seconds (X>0) before the timing when the counting of the control hold time ends (S18). Note that the multiple lighting fixtures 20 that are controlled when motion sensor 31 detects a person are grouped in advance, and in step S18, lighting fixture 20b wirelessly transmits a notification signal to the other lighting fixtures 20 that belong to the same group (i.e., lighting fixture 20a and lighting fixture 20c).

[0038] 4, arrows are drawn to indicate that the notification signal is transmitted from lighting fixture 20b to each of lighting fixture 20a and lighting fixture 20c, but the notification signal may be transmitted in any manner in step S18. For example, the multiple lighting fixtures 20 may form a wireless mesh network, and a control signal transmitted by lighting fixture 20b may be relayed to lighting fixture 20a and received by lighting fixture 20c.

[0039] Thereafter, when the counting of the control hold time ends (S19b), information processor 23 of lighting device 20b controls light source 22 to change from the first dimming state to the second dimming state. In other words, lighting device 20b transitions from the first dimming state to the second dimming state (S20b).

[0040] Meanwhile, when the notification signal is received by wireless communication unit 21, information processing unit 23 of lighting device 20a resets (initializes) the count value and stops counting (S19a), and controls light source 22 to change from the first dimming state to the second dimming state. That is, upon receiving the notification signal, lighting device 20a immediately transitions from the first dimming state to the second dimming state (S20a). Similarly, when the notification signal is received by wireless communication unit 21, information processing unit 23 of lighting device 20c resets (initializes) the count value and stops counting (S19c), and controls light source 22 to change from the first dimming state to the second dimming state. That is, upon receiving the notification signal, lighting device 20a immediately transitions from the first dimming state to the second dimming state (S20c).

[0041] Here, X seconds is set to, for example, a time that is substantially the same length as the time from when lighting device 20b transmits the notification signal to when lighting device 20a (lighting device 20c) transitions to the second dimming state. The length of X seconds is, for example, a time of about tens of milliseconds to a few seconds, and is determined specifically through experiments or calculations. As a result, X seconds after the notification signal is transmitted, multiple lighting devices 20 simultaneously transition to the second dimming state.

[0042] In this way, according to the second operation example, the lighting system 10 can reduce the lag in the timing at which the multiple lighting devices 20 change from the first dimming state to the second dimming state.

[0043] In the second operation example, the notification signal is described as being transmitted X seconds in advance. However, if the lag in the timing at which the plurality of lighting devices 20 transition to the second dimming state is reduced more than in the first operation example, the notification signal may be transmitted simultaneously with the end of counting the control hold time. The notification signal may be transmitted between the second timing immediately prior to the first timing at which the counting of the control hold time ends and the first timing (including the first timing). The second timing may be, for example, 1000 ms, 500 ms, 100 ms, 50 ms, or 10 ms before the first timing. The term "immediately prior" in the second timing immediately prior to the first timing is used in a broad sense, not in a strict sense.

[0044] [Variations] In the above operational examples 1 and 2, it has been described that the control holding time is specified in the control signal (in other words, the control signal includes information indicating the control holding time). However, the control holding time may be stored (registered) in advance in memory 24 of multiple lighting fixtures 20 at the time of initial configuration or the like, and it is not essential that the control holding time be specified in the control signal.

[0045] When the control hold time is specified in the control signal, the user only needs to change the setting in lighting control device 30 when changing the control hold time, which has the advantage that the setting change is easier than when it is necessary to change the setting in each of multiple lighting fixtures 20. When the control hold time is pre-stored in memory unit 24 of multiple lighting fixtures 20, information indicating the control hold time can be omitted from the control signal, which has the advantage that the amount of information in the control signal can be reduced.

[0046] In addition, the dimming ratio in the first dimming state is specified in the control signal (in other words, the control signal includes information indicating the dimming ratio), but it may be stored (registered) in advance in the memory units 24 of the multiple lighting fixtures 20 during initial configuration, etc., and it is not essential that the dimming ratio in the first dimming state be specified in the control signal.

[0047] When the dimming ratio in the first dimming state is specified in the control signal, the user only needs to change the setting in lighting control device 30 when changing the dimming ratio, which has the advantage that the setting change is easier than a configuration that requires changing the setting of each of multiple lighting devices 20. When the dimming ratio in the first dimming state is pre-stored in memory unit 24 of multiple lighting devices 20, information indicating the dimming ratio can be omitted from the control signal, which has the advantage that the amount of information in the control signal can be reduced.

[0048] Furthermore, in the operation examples 1 and 2, it has been described that after the control holding time has elapsed, lighting device 20 returns to the dimmed state it was in before receiving the control signal. However, after the control holding time has elapsed, lighting device 20 may transition to a predetermined dimmed state that is unrelated to the dimmed state of lighting device 20 before receiving the control signal. In other words, it is not essential that the dimmed state be restored.

[0049] Furthermore, when the lighting devices 20 receive a control signal again from the lighting control device 30 while counting the control retention time (i.e., when a person is detected again by the motion sensor 31), the lighting devices 20 reset the count value and restart counting the control retention time. This realizes an extension of the first dimming state.

[0050] It is also possible that lighting system 10 includes another lighting control device 30 in addition to lighting control device 30, and multiple lighting fixtures 20 are targets of control by lighting control device 30 and the other lighting control device 30. In such a case, when the multiple lighting fixtures 20 are counting the control retention time based on a control signal received from lighting control device 30, if they receive another control signal from the other lighting control device 30 (i.e., if a person is detected by the motion sensor 31 of the other lighting control device 30), they reset the count value and restart counting the control retention time. This realizes an extension of the first dimming state.

[0051] [Effects, etc.] Hereinafter, examples of inventions that can be obtained from the disclosure of this specification will be given, and the effects and the like that can be obtained from the inventions will be described.

[0052] Invention 1 is a lighting system 10 comprising a plurality of lighting fixtures 20 and a lighting control device 30 that wirelessly transmits a control signal to the plurality of lighting fixtures 20 upon detecting a person, wherein each of the plurality of lighting fixtures 20 transitions to a first dimming state based on the received control signal and starts counting a control hold time, and wirelessly transmits a notification signal to the other lighting fixtures 20 to notify them that counting of the control hold time will end between a second timing immediately before the first timing at which counting of the control hold time ends and the first timing, and transitions from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing.

[0053] In such lighting system 10, lighting fixture 20b, which finishes counting the control hold time earliest among the multiple lighting fixtures 20, transmits a notification signal to the other lighting fixtures 20a when or immediately before the count ends. If the other lighting fixtures 20a transition to the second dimming state upon receiving the notification signal, lighting system 10 can reduce discrepancies in the timing at which the multiple lighting fixtures 20 transition to the second dimming state.

[0054] Invention 2 is the lighting system 10 of Invention 1, in which each of the plurality of lighting devices 20 transitions from the first dimming state to the second dimming state before the first timing when the notification signal is received before the first timing.

[0055] In such a lighting system 10, lighting device 20a, upon receiving a notification signal from lighting device 20b, transitions to the second dimming state at a timing close to that of lighting device 20b without waiting for the arrival of the first timing, thereby reducing the lag in the timing at which multiple lighting devices 20 transition to the second dimming state.

[0056] Invention 3 is a lighting system 10 of Invention 1 or 2, in which the multiple lighting fixtures 20 are grouped in advance, and each of the multiple lighting fixtures 20 wirelessly transmits a notification signal to the other lighting fixtures 20 belonging to the same group when the control hold time count ends.

[0057] Such a lighting system 10 can reduce variance in the timing at which a plurality of lighting devices 20 that have been grouped in advance enter the second dimming state.

[0058] A fourth aspect of the present invention is the lighting system 10 of any one of the first to third aspects, wherein the control hold time is specified in a control signal wirelessly transmitted by the lighting control device 30.

[0059] In such a lighting system 10, the user can easily change the control hold time by changing the settings of the lighting control device 30.

[0060] A fifth aspect of the present invention is the lighting system 10 of any one of the first to third aspects, wherein the control holding time is stored in advance in the memory unit 24 of each of the plurality of lighting fixtures 20.

[0061] In such a lighting system 10, since there is no need to include information indicating the control hold time in the control signal, the user can reduce the amount of information in the control signal.

[0062] A sixth aspect of the present invention is the lighting system 10 of any one of the first to fifth aspects, wherein each of the plurality of lighting devices 20 transitions from the second dimming state to the first dimming state based on the received control signal.

[0063] In such a lighting system 10, each of the multiple lighting fixtures 20 can return to the second dimming state it was in before receiving the control signal after the control holding time has elapsed.

[0064] A seventh aspect of the present invention is the lighting system 10 of any one of the first to sixth aspects, wherein the second dimming state is a light-off state.

[0065] Such lighting system 10 can reduce discrepancies in the timing at which multiple lighting fixtures 20 are turned off.

[0066] Invention 8 is lighting device 20b which includes light source 22, wireless communication unit 21 which receives a control signal wirelessly transmitted when lighting control device 30 detects a person, and information processing unit 23 which controls light source 22 to a first dimming state based on the received control signal and starts counting a control hold time, wherein information processing unit 23 wirelessly transmits a notification signal to other lighting device 20a using wireless communication unit 21 to notify that counting of the control hold time will end, between a second timing immediately before the first timing at which counting of the control hold time ends and the first timing, and controls light source 22 from the first dimming state to a second dimming state which is darker than the first dimming state, at the first timing.

[0067] When or just before the counting ends, lighting device 20b transmits the notification signal to another lighting device 20a that finishes counting later than lighting device 20b. If the other lighting device 20a transitions to the second dimming state upon receiving the notification signal, lighting device 20b can reduce the timing lag between lighting device 20b and the other lighting device 20a when they transition to the second dimming state.

[0068] Invention 9 is a control method executed by lighting fixture 20b, the control method including step S13 of receiving a control signal wirelessly transmitted when lighting control device 30 detects a person, steps S14b and S15b of controlling light source 22 of lighting fixture 20 to a first dimming state based on the received control signal and starting counting a control hold time, step S18 of wirelessly transmitting a notification signal to the other lighting fixtures 20, between a second timing immediately before the first timing at which counting of the control hold time ends and the first timing, to notify that counting of the control hold time will end, and step S20b of controlling light source 22 from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing.

[0069] According to this control method, when or immediately before the counting ends, lighting device 20b transmits a notification signal to another lighting device 20a that finishes counting later than lighting device 20b. If the other lighting device 20a transitions to the second dimming state upon receiving the notification signal, lighting device 20b can reduce a lag in the timing at which lighting device 20b and the other lighting device 20a enter the second dimming state.

[0070] Invention 10 is a program for causing lighting device 20 to execute the control method of Invention 9.

[0071] According to this program, when or immediately before the counting ends, lighting device 20b transmits a notification signal to another lighting device 20a that finished counting later than lighting device 20b. If the other lighting device 20a transitions to the second dimming state upon receiving the notification signal, lighting device 20b can reduce a lag in the timing at which lighting device 20b and the other lighting device 20a enter the second dimming state.

[0072] (Other embodiments) Although the embodiment has been described above, the present invention is not limited to the above embodiment.

[0073] For example, in the above embodiment, the process executed by a specific processing unit may be executed by another processing unit. Also, the order of multiple processes may be changed, or multiple processes may be executed in parallel.

[0074] In the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0075] Furthermore, each component may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form a single circuit as a whole, or each may be a separate circuit. Furthermore, each of these circuits may be a general-purpose circuit, or a dedicated circuit.

[0076] Furthermore, the general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0077] For example, the present invention may be realized as the lighting system, lighting fixture, or lighting control device of the above-mentioned embodiments, or as a method executed by a computer of the lighting system, lighting fixture, lighting control device, or the like. The present invention may be realized as a program for causing a computer to execute such a method, or as a computer-readable non-transitory recording medium on which such a program is recorded. Such a program includes an upgrade program for causing an existing lighting fixture to operate like the lighting fixture of the above-mentioned embodiments.

[0078] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may think of, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention. [Explanation of symbols]

[0079] 10. Lighting System 20, 20a, 20b, 20c lighting fixtures 21, 32 Wireless Communication Section 22 Light source 23, 33 Information Processing Section 24, 34 Storage section 30 Lighting control device 31 Human Sensor 50 Indoor space

Claims

1. A number of lighting fixtures; a lighting control device that wirelessly transmits a control signal to the plurality of lighting devices upon detecting a person; Each of the plurality of lighting fixtures is transitioning to a first dimming state based on the received control signal, and starting to count a control hold time; wirelessly transmitting a notification signal to the other lighting devices to notify them that the count of the control hold time will end, during a period from a second timing immediately before the first timing at which the count of the control hold time ends to the first timing; At the first timing, the first dimming state transitions to a second dimming state that is darker than the first dimming state. Lighting system.

2. When each of the lighting devices receives the notification signal before the first timing, the lighting device transitions from the first dimming state to the second dimming state before the first timing.

10. The lighting system of claim 1.

3. The plurality of lighting fixtures are pre-grouped, When the count of the control hold time ends, each of the plurality of lighting devices wirelessly transmits the notification signal to the other lighting devices belonging to the same group.

3. A lighting system according to claim 1 or 2.

4. The control holding time is specified in the control signal wirelessly transmitted by the lighting control device.

3. A lighting system according to claim 1 or 2.

5. The control hold time is stored in advance in a memory unit of each of the plurality of lighting devices.

3. A lighting system according to claim 1 or 2.

6. Each of the plurality of lighting devices transitions from the second dimming state to the first dimming state based on the received control signal.

3. A lighting system according to claim 1 or 2.

7. The second dimming state is a light-off state.

3. A lighting system according to claim 1 or 2.

8. A light source; a wireless communication unit that receives a control signal wirelessly transmitted when the lighting control device detects a person; an information processing unit that controls the light source to a first dimming state based on the received control signal and starts counting a control retention time; The information processing unit includes: wirelessly transmitting, using the wireless communication unit, a notification signal for notifying other lighting devices that the count of the control hold time will end, between a second timing immediately before the first timing at which the count of the control hold time ends and the first timing; At the first timing, the light source is controlled from the first dimming state to a second dimming state that is darker than the first dimming state. Lighting fixtures.

9. A control method implemented by a lighting fixture, comprising: receiving a control signal wirelessly transmitted when the lighting control device detects a person; controlling a light source included in the lighting device to a first dimming state based on the received control signal, and starting counting a control hold time; wirelessly transmitting a notification signal to the other lighting devices to notify them that the count of the control hold time will end, during a period from a second timing immediately before the first timing at which the count of the control hold time ends to the first timing; and controlling the light source from the first dimming state to a second dimming state that is darker than the first dimming state at the first timing. Control methods.

10. A program for causing the lighting fixture to execute the control method according to claim 9.

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