Lighting fixture and lighting system

Abstract

The invention provides a lighting fixture and a lighting system. Provided is a lighting device or the like capable of performing dimming control on lighting so that a user can safely act in an indoor space. The lighting device is one of a plurality of lighting devices that irradiate light to different regions, and is provided with: a light source; a communication unit that receives a first detection signal indicating that a person has been detected in a target region to be irradiated with light from the lighting fixture, and a second detection signal indicating that a person has been detected in a region other than the target region; and a control unit that controls the light source to be in a first dimming state when the first detection signal is received, and that controls the light source to be in a second dimming state when all of the plurality of lighting fixtures are in the first dimming state. When a second detection signal indicating that a person has been detected in a first region other than the target region is received, and when a second detection signal indicating that a person has been detected in a second region other than the first region is received for a latest predetermined period, the first dimming state is maintained.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a lighting appliance and a lighting system. BACKGROUND

[0002] With regard to control of lighting, a technique is disclosed in which, in order to suppress a situation in which a lighting appliance is turned off despite the presence of a person in a lighting area, the brightness of lighting is gradually dimmed when it is detected that a person is not present (for example, refer to Patent Literature 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2005-108703 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, the technique disclosed in Patent Literature 1, although it discloses a case in which a region in which a person is present is illuminated, does not disclose a case in which a region in which a person is not present around the region in which a person is present is illuminated. Thus, there is a problem in that, since the region in which a person is not present is still dark, a person becomes uneasy when moving in an indoor space.

[0008] Therefore, an object of the present disclosure is to provide a lighting appliance and a lighting system that enable dimming control of lighting to enable a user to move in an indoor space with confidence.

[0009] SOLUTION TO PROBLEM

[0010] One embodiment of the lighting appliance according to the present disclosure is one of a plurality of lighting appliances that each irradiate light to a mutually different region included in a space, the lighting appliance including: a light source; a communication unit that receives a first detection signal and a second detection signal, the first detection signal indicating that a person is detected in an object region that is an object of irradiation of light by the lighting appliance, and the second detection signal indicating that a person is detected in a region other than the object region among a plurality of the regions; and a control unit that (a) controls the light source to a first dimming state when the first detection signal is received, and (b) maintains the first dimming state when all of the plurality of lighting appliances are in the first dimming state, in a case where the second detection signal indicating that a person is detected in a first region other than the object region is received, and the second detection signal indicating that a person is detected in a second region other than the first region is received within a nearest prescribed period.

[0011] In addition, one aspect of the lighting system disclosed herein includes a plurality of the aforementioned lighting fixtures and a plurality of sensors for detecting the presence of a person.

[0012] The effects of the invention

[0013] The lighting fixtures and lighting systems disclosed herein are capable of dimming and controlling lighting so that users can move around in indoor spaces with peace of mind. Attached Figure Description

[0014] Figure 1 This is a block diagram illustrating the functional structure of the lighting system according to the embodiment.

[0015] Figure 2 This is a diagram illustrating an example of the configuration of lighting fixtures and sensors in a lighting system according to an embodiment.

[0016] Figure 3 This is a schematic diagram of the communication network of the lighting system involved in the implementation method.

[0017] Figure 4 This is a diagram illustrating the operation of the lighting system according to the embodiment.

[0018] Figure 5 This is a flowchart illustrating the operation of the lighting fixture involved in the embodiment. Detailed Implementation

[0019] The following description uses the accompanying drawings to illustrate embodiments of the lighting fixtures and lighting systems disclosed herein. Furthermore, the embodiments described below represent preferred examples of this disclosure. The numerical values, constituent elements, arrangement positions of constituent elements, connection methods, steps, and order of steps shown in the following embodiments are examples and are not intended to limit this disclosure. Additionally, constituent elements in the following embodiments not described in the independent claims are described as arbitrary constituent elements constituting the preferred embodiments.

[0020] Furthermore, the figures are schematic diagrams and not necessarily strictly representations. Additionally, substantially identical structures are labeled with the same reference numerals across the figures, and sometimes repeated descriptions are omitted or simplified.

[0021] (Implementation Method)

[0022] [structure]

[0023] First, the structure of the lighting system involved in the implementation method will be described. Figure 1 This is a block diagram illustrating the functional structure of the lighting system 10 according to the embodiment. For example... Figure 1As shown, the lighting system 10 includes multiple lighting fixtures 20 and multiple sensors 30. There is no particular limitation on the number of lighting fixtures 20 and multiple sensors 30 included in the lighting system 10.

[0024] Lighting system 10 is a system for illuminating an interior space, such as an office. Users of lighting system 10 are, for example, people working in an office where lighting system 10 is installed.

[0025] Lighting fixture 20 is a lighting fixture installed on the ceiling of an interior space to illuminate that space. Lighting fixture 20 is provided, for example, by base lighting. The style of lighting fixture 20 is not particularly limited; it can be a ceiling light, downlight, or spotlight, etc. Specifically, lighting fixture 20 includes a communication unit 21, a control unit 22, a storage unit 23, and a light source 24.

[0026] The communication unit 21 is a communication circuit (communication module) used by the lighting fixture 20 to communicate with multiple sensors 30. Communication via the communication unit 21 can be wireless communication based on communication standards such as BLE (Bluetooth Low Energy), Wi-Fi, or Zigbee, but wired communication is also possible. The communication unit 21 can also communicate wiredly with one sensor 30 and wirelessly with other sensors 30. The communication standard used for communication via the communication unit 21 is not particularly limited.

[0027] The control unit 22 controls the light emission of the lighting fixture 20 (light source 24). Light emission control includes functions such as turning on, turning off, dimming, color adjustment, and light distribution control. The control unit 22 can be implemented, for example, by a microcomputer, but it can also be implemented by a processor or dedicated circuitry. The functions of the control unit 22 are achieved by the microcomputer or processor constituting the control unit 22 executing computer programs (software) stored in the storage unit 23.

[0028] The storage unit 23 is a storage device for computer programs, etc., executed by the storage control unit 22. The storage unit 23 is implemented, for example, by a semiconductor memory or the like.

[0029] Light source 24 illuminates the interior space with white light so that lighting fixture 20 illuminates the interior space. Light source 24 is implemented, for example, by an LED (Light Emitting Diode) element, but may also be implemented by other light-emitting elements such as semiconductor lasers, organic EL (Electro-Luminescence) or inorganic EL.

[0030] Sensor 30 is a sensor that functions to detect a person in the indoor space and send a detection signal indicating that a person has been detected to lighting fixture 20. Sensor 30 can be implemented, for example, by a human body sensor. A human body sensor is a thermoelectric sensor (infrared sensor) that detects infrared radiation emitted from the human body. Sensor 30 can also be implemented by an image sensor (camera) that captures images of the indoor space. Sensor 30 can also be implemented by an electromagnetic wave sensor. Sensor 30 is not particularly limited as long as it is a sensor capable of detecting the magnitude of movement.

[0031] Next, the configuration of the plurality of lighting fixtures 20 and the plurality of sensors 30 in the lighting system 10 according to the embodiment will be described. Figure 2 This is a diagram illustrating an example of the configuration of the lighting fixtures 20 and the sensor 30 in the lighting system 10 according to the embodiment.

[0032] like Figure 2 As shown, the interior space is divided into multiple zones 40, and for example, a set of lighting fixtures 20 and sensors 30 are installed for each zone. Figure 2 Specifically, the interior space is divided into 12 zones 40a to 40l. For example, zone 40a is illuminated by lighting fixture 20a and sensed by sensor 30a.

[0033] Furthermore, multiple sensors 30 or multiple lighting fixtures 20 can be set for one area 40. As long as the area 40 sensed by the sensor 30 is associated with the area 40 illuminated by the lighting fixture 20, there is no particular limitation on the number of lighting fixtures 20 and sensors 30.

[0034] A lighting fixture 20 installed in a certain area 40 illuminates that area 40 essentially when it receives a detection signal from a sensor 30 installed in that area 40 indicating that the sensor 30 has detected a person. In the lighting system 10, the lighting fixture 20 installed in a certain area 40 also receives detection signals sent by sensors 30 installed in other areas 40 to monitor the detection results of the sensors 30 in the other areas 40.

[0035] The communication network in such a lighting system 10 will now be described. Figure 3 This is a schematic diagram of the communication network of the lighting system 10 according to the embodiment. For example... Figure 3 As shown, the lighting fixture 20a (located in region 40a) communicates with the sensor 30a (associated with the lighting fixture 20a) located in region 40a. Associating the lighting fixture 20a with the sensor 30a indicates that the area illuminated by the lighting fixture 20a is the same as the area sensed by the sensor 30a.

[0036] In addition, lighting fixture 20a also communicates with sensors 30b, 30c, 30d, and 30e that are not associated with lighting fixture 20a. That is, lighting fixture 20a receives detection signals from all sensors 30a to 30e included in lighting system 10. In other words, sensor 30a sends detection signals to all lighting fixtures 20 included in lighting system 10.

[0037] In addition, Figure 3 In this context, the detection signal is described as being transmitted from each of the sensors 30a to 30e to the lighting fixture 20a, but the transmission method of the detection signal is not critical. For example, multiple lighting fixtures 20 and multiple sensors 30 could form a wireless mesh network, and the detection signal transmitted by one sensor 30 could be received by the lighting fixture 20a after being relayed by other lighting fixtures 20 and other sensors 30.

[0038] [action]

[0039] Next, the operation of the lighting system 10 according to the embodiment will be described. The lighting system 10 is a system that illuminates the lighting fixture 20 brightly not only when a person is detected in the target area that is the object of the light illuminating the lighting fixture 20, but also under predetermined conditions when a person is detected in an area other than the target area. Such a lighting system 10 can dim the lighting so that users can move around in the indoor space with peace of mind.

[0040] Below, in addition to reference Figure 2 In addition, refer to Figure 4 and Figure 5 The operation of such a lighting system 10 will be explained. Figure 4 This is a diagram illustrating the operation of the lighting system 10 according to the embodiment. Figure 4 (a) is a diagram showing the operation of the sensor 30 in the lighting system 10 according to the embodiment. Figure 4 (b) is a diagram showing the operation of the lighting fixture 20 in the lighting system 10 according to the embodiment.

[0041] exist Figure 4 (a) shows the configuration for sensing respectively Figure 2 Whether each of the sensors 30a to 30l in the areas 40a to 40l detected a person at a certain time. Figure 4 The symbol “*” in (a) indicates that sensor 30 has detected a person. For example, it is shown that sensor 30a and sensor 30b detected a person at time “3”.

[0042] exist Figure 4 (b) shows the configuration for irradiating respectively Figure 2The dimming status of lighting fixtures 20a to 20l in areas 40a to 40l at a certain time. Figure 4 The symbol “〇” in (b) indicates that the lighting fixture 20 is in the first dimming state (bright dimming state). Figure 4 The blank space in (b) indicates that lighting fixture 20 is in a second dimming state (a dimming state that is dimmer than the first dimming state). For example, at time "9", lighting fixture 20j is in the first dimming state, and lighting fixtures 20a-20i, 20k, and 20l are in the second dimming state. Additionally, in Figure 4 (a) and Figure 4 In (b), "time" is common.

[0043] exist Figure 4 In the initial time "1", all lighting fixtures 20a to 20l are in the second dimming state (dark dimming state). At time "2", when a user enters area 40a of the indoor space from outside, sensor 30a detects the user and sends a detection signal to lighting fixtures 20a to 20l. As a result, lighting fixtures 20a to 20l emit light in the first dimming state.

[0044] During time "2" and subsequent times "3" to "7", the user moves within the indoor space, and sensors 30a-30e, 30g, etc., detect the user and send detection signals to lighting fixtures 20a-20l. During this period, lighting fixtures 20a-20l continue to emit light in the first dimming state.

[0045] When the user arrives at and remains in area 40j at time "8", only sensor 30j detects the user and sends a detection signal to lighting fixtures 20a-20l. Other sensors 30a-30i and 30k-30l do not detect the user. If this state continues, only lighting fixture 20j illuminates in the first dimming state, while the other lighting fixtures 20a-20i and 20k-20l enter the second dimming state. Figure 4 During the time intervals from "9" to "11", only lighting fixture 20j emits light in the first dimming state.

[0046] If at time "11" all sensors 30a-30l fail to detect any user, then at time "12" all lighting fixtures 20a-20l will enter the second dimming state. If at time "13" sensor 30l detects the aforementioned user or other users, then lighting fixtures 20a-20l will emit light in the first dimming state.

[0047] Thus, in the lighting system 10, when all lighting fixtures 20a to 20l are in the second dimming state, all lighting fixtures 20a to 20l will light up in the first dimming state when any one of the sensors 30a to 30l detects a user. If the state of only one sensor among the sensors 30a to 30l detecting a user continues, then only the area corresponding to that one sensor will be in the first dimming state.

[0048] To achieve this action, the lighting fixtures 20a to 20l each perform the following... Figure 5 The actions shown. Figure 5 This is a flowchart illustrating the operation of the lighting fixture 20 according to the embodiment.

[0049] In addition, in the following Figure 5 In the description, it is assumed that each of the lighting fixtures 20a to 20l manages (knows) its current dimming state (whether it is the first dimming state or the second dimming state), and the following steps S14 and S15 are determined based on this management. Each of the lighting fixtures 20a to 20l manages its dimming state, for example, based on detection signals received from sensors 30a to 30l; however, the lighting fixtures 20a to 20l can also manage their dimming states through periodic communication. In the following... Figure 5 In the description, it is assumed that lighting fixture 20 is any one of lighting fixtures 20a to 20l, and sensor 30 is any one of sensors 30a to 30l.

[0050] First, the communication unit 21 receives the detection signal from the sensor 30. Figure 5 (S11). The detection signal is a signal indicating that the sensor 30 has detected the presence of a person in the detection area, which is the object of detection. The sensor 30 transmits the detection signal to the communication unit 21 of the lighting fixture 20, for example, via wireless communication.

[0051] When the communication unit 21 receives a detection signal, the control unit 22 determines whether the received detection signal is the first detection signal. Figure 5 (S12). The first detection signal is a detection signal sent by the sensor 30, which is associated with the lighting fixture 20. That is, it is a detection signal indicating that a person has been detected in the object area illuminated by the light of the lighting fixture 20. For example, Figure 2 The object of the light irradiation of the lighting fixture 20a shown is region 40a. Therefore, the first detection signal received by the lighting fixture 20a is the detection signal sent by the sensor 30a when it detects that there is a person in region 40a.

[0052] If the received detection signal is determined to be the first detection signal (in...Figure 5 If S12 is "Yes", then the control unit 22 performs control to make the light source 24 emit light for a specified period in the first dimming state. Figure 5 (S13). The first dimming state is the state in which the light source 24 emits light at a specified brightness. The specified period is, for example, 3 minutes. In addition, the specified period can also be 5 minutes or 1 minute. Here, the length of the specified period is not particularly limited.

[0053] If it is determined that the received detection signal is not the first detection signal (in Figure 5 In S12, it is "No"), that is, if the received detection signal is determined to be the second detection signal, the control unit 22 determines whether all lighting fixtures 20 are in the second dimming state ( Figure 5 (S14).

[0054] The second detection signal is a detection signal sent by a sensor 30 that is not associated with the lighting fixture 20. That is, it is a detection signal indicating that a person has been detected in an area 40 outside the object area illuminated by the light from the lighting fixture 20. The second detection signal can identify which sensor 30 sent the detection signal. For example, in... Figure 2 In this case, the second detection signal received by the lighting fixture 20a is the detection signal sent by sensors 30b to 30l. The second dimming state is the state in which the light source 24 emits light in a dimmer manner than in the first dimming state.

[0055] If all lighting fixtures 20 are determined to be in the second dimming state (in... Figure 5 If S14 is "Yes", then the control unit 22 controls the light source 24 to emit light in the first dimming state. Figure 5 (S13).

[0056] If it is determined that not all lighting fixtures 20 are in the second dimming state (in... Figure 5 If S14 is "No", then the control unit 22 determines whether all lighting fixtures 20 are in the first dimming state. Figure 5 (S15).

[0057] If it is determined that not all lighting fixtures 20 are in the first dimming state (in... Figure 5 If S15 is "No", then the control unit 22 controls the light source 24 to the second dimming state. Figure 5 (S16). That is, if it is determined that only a portion of the lighting fixtures 20 are in the first dimming state, the control unit 22 controls the light source 24 to the second dimming state.

[0058] If it is determined that all lighting fixtures 20 are in the first dimming state (in... Figure 5If S15 is "Yes", then the control unit 22 determines whether a person was detected in only one area within the most recent specified period. Figure 5 (S17). The most recent specified period is the period obtained by tracing back a specified period from the instant the probe signal is received in step S11. The most recent specified period includes the instant the probe signal is received in step S11.

[0059] If it is determined that a person was detected in multiple areas (40) within the most recent specified period (in Figure 5 If S17 is "No", then the control unit 22 controls the light source 24 to emit light in the first dimming state. Figure 5 (S13).

[0060] If it is determined that a person was detected in only one area 40 within the most recent specified period (in Figure 5 If S17 is "Yes", then the control unit 22 controls the light source 24 to the second dimming state. Figure 5 (S16).

[0061] The individual lighting fixtures 20 included in the lighting system 10 repeat this process each time a detection signal is received. Figure 5 The processing steps S11 to S17 are performed. Furthermore, each lighting fixture 20 can be repeated at intervals that are sufficiently short compared to the specified period. Figure 5 The processing steps S11 to S17.

[0062] Based on the actions described above, the lighting fixtures 20 are controlled to the first dimming state not only when someone is present in the target area, but also under specified conditions when someone is detected in an area outside the target area. In other words, the lighting system 10 maintains all lighting fixtures 20 in a bright state when the sensor 30 detects continuous user movement or multiple users in the indoor space. Therefore, users can move around confidently in the indoor space.

[0063] [Variation Example]

[0064] In the above embodiment, the control unit 22 controls the light source 24 to a second dimming state, which is dimmer than the first dimming state. However, the control unit 22 may also control the light source 24 to be in an off state instead of the second dimming state when controlling it to be in the second dimming state. In the above embodiment, the second dimming state can be appropriately replaced by an off state. Such a lighting system 10 can turn off the lighting fixtures 20 that illuminate areas without users when it is determined that there is only one user using the indoor space.

[0065] In the above embodiments, Figure 5In step S17, the control unit 22 determines whether a person was detected in only one area within the most recent specified period, but one area can also be multiple areas. That is, the control unit 22 can also determine whether a person was detected in only multiple areas within the most recent specified period. For example, if two users utilize the indoor space and each user is working in a certain area, it is determined that a person was detected in only two areas within the most recent specified period. The number of multiple areas is, for example, two, but it can also be three; the number of multiple areas is not particularly limited. Such a lighting system 10 can prevent lighting fixtures 20 that illuminate areas without users from remaining in a first dimming state when the number of users utilizing the indoor space is less than the specified number of multiple areas.

[0066] In the above embodiments, Figure 5 In step S12, the control unit 22 determines whether the detection signal is a first detection signal, but it can also determine whether it is a first detection signal or a predetermined second detection signal. A predetermined second detection signal is, for example, a detection signal indicating the presence of a person in a region near the object area illuminated by the light from the lighting fixture 20. The region near the object area is, for example, a region adjacent to the object area. Such a lighting system 10 controls the lighting to illuminate the area adjacent to the user in a first dimming state when the user is in a certain area. Therefore, the user can work with greater peace of mind while in a certain area.

[0067] Alternatively, the specified second detection signal could be, for example, a detection signal sent by sensor 30 that detects areas including entrances and exits of the indoor space. Controlling the lighting system 10 in this way causes all lighting fixtures 20 to illuminate in a first dimming state whenever a user enters or exits the indoor space, thus allowing the user to move around the indoor space with peace of mind.

[0068] In the above embodiments, ​ In steps S14 and S15, each of the lighting fixtures 20a to 20l manages (knows) its current dimming state (whether it is the first dimming state or the second dimming state), and determines the dimming state of other lighting fixtures 20 based on this management. However, the control unit 22 can also determine the dimming state of other lighting fixtures 20 by receiving the dimming states of each lighting fixture 20 via a mesh network composed of multiple lighting fixtures 20. Alternatively, the lighting system 10 may also include a device for acquiring the dimming states of each of the multiple lighting fixtures 20, and the control unit 22 can also determine the dimming state of other lighting fixtures 20 based on the dimming states of each of the multiple lighting fixtures 20 acquired from this device.

[0069] [Effects, etc.]

[0070] The techniques disclosed in this specification are illustrated below, and their effects are explained together.

[0071] Technology 1 is one of a plurality of lighting fixtures 20 that each illuminates different areas 40 contained in a space. The lighting fixture 20 includes: a light source 24; a communication unit 21 that receives a first detection signal and a second detection signal, wherein the first detection signal indicates that a person is detected in an object area that is the object of illumination by the light of the lighting fixture 20, and the second detection signal indicates that a person is detected in an area 40 other than the object area among the plurality of areas 40; and a control unit 22 that (a) controls the light source 24 to a first dimming state when the first detection signal is received, and (b) when all the plurality of lighting fixtures 20 are in the first dimming state, maintains the first dimming state when a second detection signal indicating that a person is detected in the first area other than the object area is received, and a second detection signal indicating that a person is detected in the second area other than the first area is received within a recent specified period.

[0072] According to such a lighting fixture 20, the entire indoor space remains bright even when the user is constantly moving or when there are multiple users in the indoor space, so that the user can move around in the indoor space with peace of mind.

[0073] Regarding technology 2, in the lighting fixture 20 described in technology 1, when all the lighting fixtures 20 are in a second dimming state or an off state that is darker than the first dimming state, the control unit 22 will control the light source 24 to the first dimming state regardless of which detection signal is received, the first detection signal or the second detection signal.

[0074] Regarding such lighting fixtures 20, if a person is detected while all lighting fixtures 20 are in the second dimming state or off state, all lighting fixtures 20 are controlled to the first dimming state. Therefore, when a user enters a dimly lit indoor space, the entire indoor space becomes bright, allowing the user to move around the indoor space with peace of mind.

[0075] Regarding technology 3, in the lighting fixture 20 of technology 1 or 2, when all of the multiple lighting fixtures 20 are in the first dimming state, a second detection signal indicating that a person has been detected in the first area is received, and only the second detection signal indicating that a person has been detected in the first area is received within the most recent specified period, the control unit 22 controls the light source 24 to a second dimming state or an off state that is dimmer than the first dimming state.

[0076] According to such a lighting fixture 20, when there is only one user in the indoor space, the lighting fixture 2 that illuminates the area without users can be switched to a second dimming state or turned off state.

[0077] Regarding technology 4, in any of the technologies 1 to 3, the first region of the lighting fixture 20 is a plurality of regions 40.

[0078] Such a lighting fixture 20 can suppress the illumination of areas without users when the number of users utilizing the indoor space is less than the number of specified areas, and keep the lighting fixture 20 in the first dimming state.

[0079] Regarding technology 5, in any of the technologies 1 to 4, when a second detection signal indicating that a person has been detected in a region near the target area is received, the control unit 22 controls the light source 24 to a first dimming state.

[0080] Such a lighting fixture 20 is controlled to illuminate areas adjacent to occupied areas. The lighting fixture 20 is also in a first dimming state, illuminating the surrounding area when a user is in a certain area. Therefore, the user can work with peace of mind.

[0081] Technology 6 is a lighting system 10 that includes lighting fixtures 20 of any of technologies 1 to 5 and multiple sensors 30 for detecting the presence of a person.

[0082] When the sensor 30 detects that a user is moving continuously or that there are multiple users in the indoor space, the lighting system 10 keeps all the lighting fixtures 20 bright, so that the user can move around in the indoor space with peace of mind.

[0083] (Other implementation methods)

[0084] The lighting fixtures and lighting systems disclosed herein have been described above based on embodiments, but this disclosure is not limited to these embodiments. Various modifications to the embodiments that can be conceived by those skilled in the art, and other methods of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this disclosure, provided they do not depart from its spirit.

[0085] Furthermore, in the above embodiments, the lighting system is implemented by multiple devices. Thus, the term "system" in this specification can refer to a system composed of multiple devices or a system composed of a single device. When the system is composed of multiple devices, the constituent elements of the system (especially functional constituent elements) can be arbitrarily assigned to the multiple devices.

[0086] Furthermore, the communication method between devices in the above embodiments is not particularly limited. Additionally, a relay device (such as a broadband router, not shown) may be inserted into the communication between devices.

[0087] Furthermore, in the above embodiments, the processing performed by a specific processing unit can also be performed by other processing units. Additionally, the order of multiple processes can be changed, or multiple processes can be executed in parallel.

[0088] Furthermore, in the above embodiments, each component can also be implemented by executing a software program suitable for each component. Each component can also be implemented by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0089] Furthermore, each component can also be implemented in hardware. For example, each component can be a circuit (or integrated circuit). These circuits can either form a single circuit as a whole, or they can be separate circuits. In addition, each of these circuits can be a general-purpose circuit or a special-purpose circuit.

[0090] Explanation of reference numerals in the attached figures

[0091] 10: Lighting system; 20, 20a-20l: Lighting fixtures; 21: Communication unit; 22: Control unit; 24: Light source; 30, 30a-30l: Sensors; 40, 40a-40l: Area.

Claims

1. A lighting fixture, comprising one of a plurality of lighting fixtures that each illuminates different areas contained within a space, the lighting fixture comprising: light source; The communication unit receives the first detection signal and the second detection signal, wherein... The first detection signal indicates that a person is detected in the object area that is the object of the light irradiation of the lighting fixture, and the second detection signal indicates that a person is detected in an area other than the object area among the plurality of areas; as well as The control unit (a) controls the light source to a first dimming state when it receives the first detection signal, and (b) when all the plurality of lighting fixtures are in the first dimming state, it maintains the first dimming state when it receives a second detection signal indicating that a person is detected in a first area outside the target area and receives a second detection signal indicating that a person is detected in a second area outside the first area within a recent specified period.

2. The lighting fixture according to claim 1, wherein, When all the lighting fixtures are in a second dimming state or an off state that is dimmer than the first dimming state, the control unit will control the light source to the first dimming state regardless of which of the first and second detection signals is received.

3. The lighting fixture according to claim 1 or 2, wherein, When all the multiple lighting fixtures are in the first dimming state, a second detection signal indicating that a person has been detected in the first area is received, and only the second detection signal indicating that a person has been detected in the first area is received within the most recent specified period, the control unit controls the light source to a second dimming state that is dimmer than the first dimming state or to an off state.

4. The lighting fixture according to claim 1 or 2, wherein, The first region is multiple regions.

5. The lighting fixture according to claim 1 or 2, wherein, When the control unit receives the second detection signal indicating that a person has been detected in a region near the object area, the control unit controls the light source to the first dimming state.

6. A lighting system comprising: Multiple lighting fixtures according to claim 1 or 2; and Multiple sensors are used to detect the presence of people.

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