Lighting control system, lighting device, lighting control method and program

Abstract

This disclosure aims to suppress the occurrence of malfunctions in brightness detection. [Solution] The lighting device A1 includes a light source unit 10 that irradiates the lighting space with illumination light, a power supply unit 11 that supplies power to the light source unit 10, a wireless communication unit 12 that receives wireless signals, a control unit 14 that controls the power supply unit 11 based on control commands included in the wireless signals, and a storage unit 13 that stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source unit 10. When the control unit 14 receives a specific control command, it refers to the light source identification information stored in the storage unit 13 and controls at least one of the light source unit 10 and the power supply unit 11 so as not to interfere with brightness detection.

Description

Technical Field

[0001] The present disclosure relates to a lighting control system, a lighting device, a lighting control method, and a program, and more particularly, to a lighting control system, a lighting device, a lighting control method, and a program that perform lighting control by wireless communication.

Background Art

[0002] Conventionally, lighting control systems that perform lighting control by wireless communication have been provided for the purpose of construction workability in new construction and renovation. For example, the lighting system (lighting control system) described in Patent Document 1 has lighting fixtures (lighting devices), a lighting control remote controller (control device), a human presence sensor, an illuminance sensor, and the like.

[0003] The lighting control remote controller has a plurality of buttons that correspond one-to-one with a plurality of scenes. A scene indicates that the lighting fixture is lit at a specific dimming rate and color temperature. That is, when any button is operated, a lighting control command for lighting the lighting fixture at the dimming rate and color temperature of the scene corresponding to the operated button is transmitted from the lighting control remote controller to the lighting fixture.

[0004] In addition, the lighting control system can also control the lighting fixture based on the detection result of a person by the human presence sensor and the illuminance detected by the illuminance sensor. In this case, the detection operations of the human presence sensor and the illuminance sensor are turned on / off in response to a control command transmitted from the lighting control remote controller or other devices.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in the lighting control system described above, if the dimming rate of a lighting fixture is changed while the illuminance sensor is detecting (measuring) the illuminance, for example, there is a risk that a malfunction may occur in brightness detection.

[0007] The purpose of this disclosure is to provide a lighting control system, lighting device, lighting control method, and program that can suppress the occurrence of malfunctions in brightness detection. [Means for solving the problem]

[0008] A lighting control system according to one aspect of the present disclosure comprises a control device, a sensor device that can communicate wirelessly with the control device, and a lighting device that can communicate wirelessly with the control device and the sensor device. The lighting device includes a light source unit that irradiates a lighting space with lighting light, a power supply unit that supplies power to the light source unit, a wireless communication unit that receives a wireless signal, a control unit that controls the power supply unit and the light source unit based on a control command included in the wireless signal, and a storage unit that stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source unit. The sensor device includes a wireless communication unit that transmits and receives the wireless signal, a brightness detection unit that detects the brightness of the lighting space, and a sensor control unit that controls the wireless communication unit to transmit the wireless signal including the detection result of the brightness detection unit or the wireless signal including a control command for controlling the lighting device based on the detection result. When the sensor control unit receives the control command related to sensor control from the wireless signal transmitted from the control device and received by the wireless communication unit, it causes the brightness detection unit to start brightness detection. When the control unit receives a specific control command included in the control commands related to the sensor control, it refers to the light source identification information stored in the memory unit and controls at least one of the light source unit and the power supply unit so as not to interfere with the brightness detection.

[0009] A lighting device according to one aspect of the present disclosure is used in the lighting control system. The lighting device includes a light source unit that irradiates the lighting space with lighting light, a power supply unit that supplies power to the light source unit, a wireless communication unit that receives the wireless signal, a control unit that controls the power supply unit based on the control command included in the wireless signal, and a storage unit that stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source unit. When the control unit receives the specific control command included in the control command related to the sensor control, it refers to the light source identification information stored in the storage unit and controls at least one of the light source unit and the power supply unit so as not to interfere with brightness detection.

[0010] A lighting control method according to one aspect of the present disclosure is a lighting control method in a lighting control system. When the lighting control method receives a specific control command, it refers to the light source identification information stored in the memory unit and causes the control unit to control at least one of the light source unit and the power supply unit so as not to interfere with brightness detection.

[0011] A program according to one aspect of this disclosure causes a computer system to execute the lighting control method. [Effects of the Invention]

[0012] The lighting control system, lighting device, lighting control method, and program disclosed herein have the effect of suppressing the occurrence of malfunctions in brightness detection. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a system configuration diagram of a lighting control system according to an embodiment of the present disclosure. [Figure 2] Figure 2 is a block diagram of the lighting equipment in the same lighting control system. [Figure 3] Figure 3 is a block diagram of the sensor device in the same lighting control system. [Figure 4]FIG. 4 is a block diagram of a communication device in the same lighting control system. [Figure 5] FIG. 5 is a block diagram of a control device in the same lighting control system. [Figure 6] FIG. 6 is an explanatory diagram of a mesh network used in the same lighting control system. [Figure 7] FIG. 7 is an arrangement diagram of areas and zones in the same lighting control system. [Figure 8] FIG. 8 is a sequence diagram for explaining the operation of sensor control in the same lighting control system. [Figure 9] FIG. 9 is a sequence diagram for explaining the operation of schedule control in the same lighting control system. [Figure 10] FIG. 10 is a sequence diagram for explaining the calibration operation of a brightness detection unit in the same lighting control system. [Figure 11] FIG. 11 is a sequence diagram for explaining the calibration operation of a brightness detection unit in the same lighting control system. [Figure 12] FIG. 12 is a flowchart for explaining the operation of a control unit of a lighting device in the same lighting control system. [Figure 13] FIG. 13 is a flowchart for explaining the operation of a control unit of a lighting device in Modification 1 of the same lighting control system. [Figure 14] FIG. 14 is a block diagram of a lighting device in Modification 2 of the same lighting control system. [Figure 15] FIG. 15 is a block diagram of a load control device in Modification 3 of the same lighting control system.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. However, the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0015] (1) Overview The lighting control system S1 according to the embodiment includes a control device, a sensor device B1 capable of wireless communication with the control device, and a lighting device A1 capable of wireless communication with the control device and the sensor device B1 (see FIG. 1). The lighting control system S1 according to the embodiment is installed in, for example, commercial facilities such as office buildings and shopping centers, factories, warehouses, and public facilities such as libraries. However, these facilities are merely examples, and the location where the lighting control system S1 according to the embodiment is installed is not limited.

[0016] The control device can transmit a wireless signal including a control command. The control device in the embodiment includes a tablet C1, a handy remote control C2, and a schedule device D1.

[0017] The lighting device A1 includes a light source unit 10 that irradiates lighting light into a lighting space, a power supply unit 11 that supplies power to the light source unit 10, a wireless communication unit 12 that receives a wireless signal, and a control unit 14 that controls the power supply unit and the light source unit 10 based on a control command included in the wireless signal, and a storage unit 13 that stores light source identification information that can uniquely identify the irradiation direction and dimming availability of the light source unit 10 (see FIG. 2). Although the lighting control system S1 according to the embodiment includes a plurality of lighting devices A1, it may include only one lighting device A1.

[0018] The light source unit 10 has, for example, an LED module formed by mounting multiple LEDs on a substrate. The LED module may be composed of multiple types of LEDs with different light colors. The power supply unit 11 includes, for example, a power conversion circuit that converts AC power supplied from an external power supply P1 into DC power. The power supply unit 11 is configured to dim (or adjust the color) of the light source unit 10 by increasing or decreasing the power (DC current) supplied from the power conversion circuit to the light source unit 10. The wireless communication unit 12 is configured to perform wireless communication using radio waves as a medium.

[0019] The control unit 14, for example, has a microcontroller as its main component. The control unit 14 is configured to perform various processes related to lighting control by causing the microcontroller's processor to execute a program for lighting control.

[0020] The sensor device B1 includes a wireless communication unit 23 that transmits and receives wireless signals, a brightness detection unit 20 that detects the brightness of the illuminated space, and a sensor control unit 22 that controls the wireless communication unit 23 to transmit a wireless signal including the detection result of the brightness detection unit 20 or a wireless signal including a control command for controlling the lighting device A1 based on the detection result (see Figure 3). When the sensor control unit 22 receives a control command related to sensor control from a wireless signal transmitted from the control device and received by the wireless communication unit 23, it causes the brightness detection unit 20 to start brightness detection.

[0021] The brightness detection unit 20 is configured to detect the illuminance of the floor, desk surface, walls, etc., in the illuminated space. Specifically, the brightness detection unit 20 detects the intensity of light reflected from the floor, desk surface, walls, etc., in the illuminated space and outputs an electrical signal corresponding to the detected intensity to the sensor control unit 22.

[0022] When the control unit 14 of the lighting device A1 receives a specific control command included in the control commands related to sensor control, it refers to the light source identification information stored in the memory unit 13 and controls at least one of the power supply unit 11 and the light source unit 10 so as not to interfere with the brightness detection of the brightness detection unit 20. In this embodiment, the light source identification information includes the irradiation direction of the light source unit 10 (ceiling surface, floor surface, etc.) and information regarding dimming capability.

[0023] For example, consider a scenario where there is a lighting device A1 that shines illumination light toward the ceiling on which sensor device B1 is installed. When the illumination light emitted from such lighting device A1 enters the brightness detection unit 20, the brightness detection unit 20 may not be able to correctly detect the brightness of the illuminated space (the brightness of the detection target, such as the floor or desk surface) (it may interfere with brightness detection). Alternatively, a lighting device A1 that cannot adjust (dimm) the amount of illumination light may also interfere with the brightness detection unit 20's ability to detect brightness.

[0024] In contrast, the lighting control system S1 according to this embodiment stores light source identification information in the storage unit 13 of the lighting device A1, which may interfere with the brightness detection of the brightness detection unit 20, so that it can determine whether or not it will interfere with the brightness detection. Then, the control unit 14 of the lighting device A1, which may interfere with the brightness detection of the brightness detection unit 20, controls at least one of the power supply unit 11 and the light source unit 10 based on the light source identification information stored in the storage unit 13. For example, the control unit 14 of the lighting device A1, which may interfere with the brightness detection of the brightness detection unit 20, performs control that does not interfere with the brightness detection of the brightness detection unit 20, such as control to set the amount of light irradiated by the light source unit 10 in the direction of the ceiling surface to zero or close to zero, or control to turn off (turn off) the light source unit 10 that cannot be dimmed.

[0025] As a result, the lighting control system S1 according to this embodiment can suppress the occurrence of malfunctions in brightness detection.

[0026] (2)Details Next, the lighting control system S1 according to the embodiment (hereinafter referred to as lighting control system S1) will be described in detail with reference to the drawings.

[0027] (2-1) System Configuration As shown in Figure 1, the lighting control system S1 includes multiple lighting devices A1, a sensor device B1, a scheduling device D1, a tablet C1, a handheld remote control C2, and the like. However, the number of lighting devices A1 may be just one.

[0028] Multiple lighting devices A1, sensor devices B1, and scheduling devices D1 are supplied with AC power from an external power source P1 via a two-wire power supply circuit P11. However, a switch device J1 is inserted into the power supply circuit P11. The switch device J1 is equipped with an operating handle J11 and is configured to switch the connection state between the external power source P1 and the power supply circuit P11 on / off each time the operating handle J11 is operated. In other words, when the switch device J1 is turned on, AC power is supplied from the external power source P1 via the power supply circuit P11, and the lighting control system S1 becomes operational. On the other hand, when the switch device J1 is turned off, AC power is not supplied from the external power source P1 via the power supply circuit P11, and the lighting control system S1 becomes inoperable.

[0029] (2-1-1) Lighting device The lighting device A1 includes a light source unit 10, a power supply unit 11, a wireless communication unit 12, a storage unit 13, and a control unit 14 (see Figure 2).

[0030] The light source unit 10 has, for example, an LED module configured by mounting multiple LEDs on a substrate. However, the light source units 10 in multiple lighting devices A1 may be of different types. For example, the light source unit 10 includes a light source unit 10 that emits monochromatic illumination light, a light source unit 10 whose color temperature of illumination light is variable, a light source unit 10 whose light color is variable, and a light source unit 10 whose illumination direction can be switched. The light source unit 10 whose color temperature of illumination light is variable has LED modules that emit illumination light of different color temperatures (for example, incandescent and daylight). The light source unit 10 whose light color is variable has LED modules that emit illumination light of different colors such as red light, green light, and blue light. Furthermore, the light source unit 10 whose illumination direction can be switched has, for example, an LED module that emits illumination light toward the floor and an LED module that emits illumination light toward the ceiling or wall.

[0031] The power supply unit 11 includes a power conversion circuit that converts AC power supplied from an external power supply P1 via a power supply line P11 into DC power, and a constant current circuit that operates to match the DC current supplied to the light source unit 10 to a target value. However, the power supply unit 11 may have multiple constant current circuits depending on the type of light source unit 10. That is, a power supply unit 11 paired with a light source unit 10 whose illumination light color temperature is variable has multiple constant current circuits that supply DC current individually to multiple LED modules with different color temperatures. Also, a power supply unit 11 paired with a light source unit 10 whose illumination light color is variable has multiple constant current circuits that supply individual DC current to LED modules with multiple light colors. Furthermore, a power supply unit 11 paired with a light source unit 10 whose irradiation direction can be switched has, for example, a constant current circuit that supplies DC current to an LED module that radiates illumination light toward the floor, and a constant current circuit that supplies DC current to an LED module that radiates illumination light toward the ceiling or wall.

[0032] The wireless communication unit 12 includes a wireless communication circuit, an antenna, and the like. The wireless communication circuit is an integrated circuit configured to perform wireless communication and mesh communication using radio waves, in accordance with wireless communication standards such as BLE (Bluetooth® low energy). However, the wireless communication circuit may be configured to perform wireless communication in accordance with wireless communication standards other than BLE, such as Wi-Fi®, ZigBee®, and 920MHz band low-power radio stations (for telecontrol). The wireless communication circuit is capable of transmitting and receiving wireless signals through the antenna.

[0033] The memory unit 13 has, for example, an electrically rewritable non-volatile semiconductor memory. The memory unit 13 stores, for example, multiple scene information and light source identification information. Each of the multiple scene information includes illumination-related information that specifies at least one of the following: illumination light intensity, light color, and irradiation direction, and mode specification information that specifies one control mode from among multiple control modes. Here, the power supply unit 11 adjusts the amount of illumination light output by the light source unit 10 by adjusting the DC current supplied to the light source unit 10. The amount of illumination light is expressed by the dimming level of the light source unit 10. The dimming level is defined as the ratio of the light amount when the light amount when the rated current is flowed through the light source unit 10 is set to 100%. For example, a dimming level of 50% indicates that the light amount of the light source unit 10 is half the light amount when the rated current is flowed through it. The light color is defined by the color temperature when the color temperature of the illumination light from the light source unit 10 is variable. However, the illumination-related information that specifies the light color is indicated by the ratio of the light amounts of multiple types of LED modules with different color temperatures. Similarly, if the light color of the light source unit 10 is variable, the lighting information specifying the light color is indicated by the ratio of the light intensity of each color LED module. Similarly, if the light color of the light source unit 10 is variable, the lighting information specifying the light color is indicated by the ratio of the current flowing through each color LED module. Furthermore, the lighting information specifying the irradiation direction of the light source unit 10 is indicated, for example, by a numerical value corresponding to the irradiation direction (0: downward, 1: upward, etc.). Light source identification information will be described later.

[0034] The control unit 14 mainly consists of a microcontroller. The control unit 14 is configured to perform various processes related to lighting control by having the microcontroller's processor execute a program for lighting control. Based on the wireless signal received by the wireless communication unit 12, the control unit 14 selects one scene from a plurality of scene information stored in the storage unit 13, and controls the power supply unit 11 based on the selected scene information.

[0035] Furthermore, the control unit 14 selectively executes one of several control modes, including a first control mode and a second control mode. When executing the first control mode, the control unit 14 controls the power supply unit 11 based on control commands included in wireless signals transmitted from multiple control devices (such as the tablet C1, handy remote control C2, and scheduling device D1, which will be described later). When executing the second control mode, the control unit 14 controls the power supply unit 11 based only on control commands included in wireless signals transmitted from one of the multiple control devices (tablet C1).

[0036] (2-1-2) Sensor device The sensor device B1 includes a brightness detection unit 20, a human detection unit 21, a sensor control unit 22, a wireless communication unit 23, a storage unit 24, and the like (see Figure 3).

[0037] The brightness detection unit 20 includes, for example, a photoelectric conversion element and a signal processing circuit that processes the output signal of the photoelectric conversion element. The brightness detection unit 20 detects reflected light from the floor or desk surface within the detection range as the amount of incident light, converts the detected amount of incident light into a voltage signal (brightness signal), and outputs it to the sensor control unit 22.

[0038] The human detection unit 21 has a passive sensor that detects heat rays (infrared rays) emitted from the human body, generally called a heat ray sensor or PIR (Passive Infrared) sensor. However, the human detection unit 21 may also have an active sensor that detects a person (moving object) by emitting radio waves (microwaves) and receiving the radio waves reflected by an antenna after they hit an object in space, thereby determining whether or not the object is moving. When the human detection unit 21 detects the presence of a person in the detection area, it outputs a human detection signal to the sensor control unit 22.

[0039] Alternatively, the brightness detection unit 20 and the person detection unit 21 may be configured to have a single image sensor, detect a person from the difference between the background image acquired by the image sensor and the current image, and also detect brightness from the acquired image.

[0040] The sensor control unit 22 primarily consists of a microcontroller. The sensor control unit 22 is configured to perform various processes related to sensor control by having the microcontroller's processor execute a program for sensor control.

[0041] The sensor control unit 22 compares the brightness (illuminance within the detection range) indicated by the brightness signal input from the brightness detection unit 20 with the brightness target value, and creates control commands (control commands included in control commands related to sensor control) necessary to keep the difference between the illuminance within the detection range and the brightness target value within a predetermined range. For example, if the difference between the illuminance within the detection range and the brightness target value is greater than the upper limit of the predetermined range, the sensor control unit 22 creates a control command to lower the dimming level in order to reduce the difference between the illuminance within the detection range and the brightness target value. Conversely, if the difference between the illuminance within the detection range and the brightness target value is smaller than the lower limit of the predetermined range, the sensor control unit 22 creates a control command to raise the dimming level in order to reduce the difference between the illuminance within the detection range and the brightness target value. The sensor control unit 22 passes the created control commands to the wireless communication unit 23.

[0042] The wireless communication unit 23, like the wireless communication unit 12 of the lighting device A1, includes a wireless communication circuit, antenna, etc. The wireless communication circuit is an integrated circuit configured to perform wireless communication and mesh communication in accordance with the same wireless communication standards as the wireless communication circuit of the wireless communication unit 12. The wireless communication circuit can send and receive wireless signals through the antenna. The wireless communication unit 23 transmits messages, including control commands received from the sensor control unit 22, as wireless signals.

[0043] The memory unit 24 has, for example, an electrically rewritable non-volatile semiconductor memory. The memory unit 24 stores multiple scene information. However, each scene information stored by the memory unit 24 will match the scene information stored by the memory unit 13 of the lighting device A1. More specifically, each scene information stored by the memory unit 24 includes the same mode specification information as the mode specification information stored by the memory unit 13 of the lighting device A1, and information regarding the operation of the sensor device B1. The sensor device B1 is also included among the multiple control devices.

[0044] (2-1-3) Scheduling device The scheduling device D1 includes a clock unit 40, a schedule storage unit 41, a schedule control unit 42, a wireless communication unit 43, and the like (see Figure 4).

[0045] The clock unit 40 includes, for example, a real-time clock module. The real-time clock module is an integrated circuit configured to generate and output digital data including the time and date from a clock source. The clock unit 40 outputs the digital data of the time and date (hereinafter referred to as clock data) generated by the real-time clock module to the schedule control unit 42.

[0046] The schedule storage unit 41 has an electrically rewritable non-volatile semiconductor memory. The schedule storage unit 41 stores a schedule for lighting control. The schedule includes, for example, a combination of time zones and specification information that specifies scene information.

[0047] The schedule control unit 42 primarily consists of a microcontroller. The schedule control unit 42 is configured to perform various processes related to schedule control by having the microcontroller's processor execute a program for schedule control. The schedule control unit 42 refers to the clock data obtained from the clock unit 40 and the schedule stored in the schedule storage unit 41, and when the current time in the clock data matches the start time of the schedule, it creates a control command from the schedule specification information and passes it to the wireless communication unit 43.

[0048] The wireless communication unit 43, like the wireless communication unit 12 of the lighting device A1, includes a wireless communication circuit, an antenna, and the like. The wireless communication circuit is an integrated circuit configured to perform wireless communication and mesh communication in accordance with the same wireless communication standards as the wireless communication circuit of the wireless communication unit 12. The wireless communication circuit can send and receive wireless signals through the antenna. The wireless communication unit 43 transmits messages, including control commands received from the schedule control unit 42, via wireless signals.

[0049] Furthermore, if the microcontroller of the schedule control unit 42 is equipped with a real-time clock module, the clock function may be implemented using the real-time clock module of the microcontroller.

[0050] However, since the scheduling device D1 transmits control commands to the lighting device A1 using clock data as a trigger input, it also plays the role of a control device in the lighting control system S1.

[0051] (2-1-4) Tablet The tablet C1 is a portable computer system consisting of a System on a Chip (SoC), a touch panel display device C10, and other components housed in a rectangular, flat enclosure C11 (see Figure 1).

[0052] An SoC is a single-chip semiconductor device that incorporates a CPU (Central Processing Unit), GPU (Graphics Processing Unit), modem, and other components. A touch panel display device C10 is, for example, a touch panel liquid crystal display or a touch panel organic EL (Electro-Luminescence) display.

[0053] In the lighting control system S1, the tablet C1 acts as the control device 5 by having the SoC (CPU) execute a control program (application program). In addition, the lighting control system S1 allows various information, including schedule information for schedule control, to be set for the lighting device A1, sensor device B1, scheduling device D1, handheld remote control C2, etc., by having the SoC (CPU) execute a schedule setting program (application program).

[0054] The control device 5 includes an input receiving unit 50, a control unit 51, and a wireless communication unit 52 (see Figure 5). The input receiving unit 50 is implemented by the touch panel of the tablet C1. The control unit 51 is implemented by the CPU of the tablet C1. The wireless communication unit 52 is implemented by the modem of the tablet C1. The wireless communication unit 52 is configured to perform wireless communication compliant with standards such as BLE and Wi-Fi (registered trademark).

[0055] In this embodiment, the control device 5 is implemented using tablet C1, but the control device 5 may also be configured with dedicated hardware and software.

[0056] (2-1-5) Handheld remote control The handheld remote control C2 has a main body C20 made of a rectangular parallelepiped-shaped synthetic resin molded body (see Figure 1). The main body C20 is small enough for a person to hold in one hand. Multiple (six in the illustrated example) operation buttons C21 to C26 are provided on the front of the main body C20.

[0057] In the lighting control system S1, the handheld remote control C2 is assigned the role of the control device 5. Specifically, the handheld remote control C2 incorporates the input receiving unit 50, control unit 51, and wireless communication unit 52 that constitute the control device 5 into the main unit C20.

[0058] The input receiving unit 50 has six tact switches that correspond one-to-one with six operation buttons C21 to C26. These six tact switches are configured to turn on when the corresponding operation buttons C21 to C26 are pressed. In other words, the input receiving unit 50 is configured to receive operation inputs corresponding to each operation button C21 to C26 when the tact switches are turned on.

[0059] The control unit 51 mainly consists of a microcontroller. The control unit 51 is configured to perform various processes related to lighting control, such as scene selection and switching the lighting device A1 on and off, by having the microcontroller's processor execute a control program.

[0060] The wireless communication unit 52, like the wireless communication unit 12 of the lighting device A1, includes a wireless communication circuit, antenna, etc. The wireless communication circuit is an integrated circuit configured to perform wireless communication and mesh communication in accordance with the same wireless communication standards as the wireless communication circuit of the wireless communication unit 12. The wireless communication circuit can send and receive wireless signals through the antenna. The wireless communication unit 52 transmits messages, including control commands received from the control unit 51, as wireless signals.

[0061] (2-2) Mesh network in lighting control system The lighting control system S1 constructs a mesh network with each of the lighting device A1, sensor device B1, and scheduling device D1 acting as a communication terminal (node). Each node in the mesh network (lighting device A1, sensor device B1, and scheduling device D1) is assigned a unique network address.

[0062] In this embodiment, the mesh network NW1 forms a partially connected mesh network, as shown in Figure 6. The mesh network NW1 has multiple (four in the illustrated example) subnetworks SN1, SN2, SN3, and SN4. Each of these subnetworks SNi (i=1, 2, 3, 4) has one or more nodes Nij (j=1, 2, ...). Each of the multiple nodes Nij can communicate directly with other nodes Nij within its own subnetwork SNi, but cannot communicate directly with nodes Nij belonging to a different subnetwork SNi.

[0063] In each subnetwork SNi, one of several nodes Nij acts as the management node MNi. Each management node MNi can communicate directly with other nodes Nij within its own subnetwork SNi, and also with other management nodes MNi belonging to other subnetwork SNi. In other words, all nodes Nij belonging to each subnetwork SNi can communicate via the management node MNi of its own subnetwork SNi with all nodes Nij belonging to other subnetwork SNi.

[0064] Furthermore, one of the multiple management nodes MNi acts as the master unit. The master unit performs processes such as synchronizing all nodes Nij (including the management node MNi) belonging to the mesh network NW1, and broadcasting messages to the entire mesh network NW1.

[0065] (2-3) Grouping in lighting control systems As shown in Figure 7, a lighting control system S1 has one or more areas ARi (i=1, 2, ..., n). Each area ARi has one or more zones ZNij (j=1, 2, ...). Each zone ZNij contains multiple lighting devices A1 and, if necessary, one sensor device B1. However, a zone ZNij may contain only one lighting device A1, and may not contain a sensor device B1. Furthermore, the zoning of zones ZNij and areas ARi is independent of the topology of the mesh network NW1. For example, a single subnetwork SNi may contain multiple zones ZNij and areas ARi. Alternatively, multiple nodes Nij belonging to different subnetworks SNi may reside in a single zone ZNij. Note that a lighting control system S1 has at most one scheduling device D1, but the scheduling device D1 does not belong to any area ARi or any zone ZNij.

[0066] The lighting control system S1 assigns the scheduling device D1 the role of the master unit in the mesh network NW1. However, if the lighting control system S1 does not have the scheduling device D1, it may assign the role of the master unit to either the lighting device A1 or the sensor device B1.

[0067] The control device 5, implemented on tablet C1, can communicate with the management node MNi in the mesh network NW1 via BLE communication when the lighting control system S1 is in operation. The lighting control system S1 assigns the role of management node MNi to either the scheduling device D1, sensor device B1, or lighting device A1. Furthermore, tablet C1 can communicate with all nodes (scheduling device D1, sensor device B1, lighting device A1) and the handheld remote control C2 (control device 5) via BLE communication.

[0068] The control device 5, implemented with the handheld remote control C2, can perform mesh communication with the nodes of the mesh network NW1 (scheduling device D1, lighting device A1, and sensor device B1) only when transmitting control commands. Furthermore, the control device 5, implemented with the handheld remote control C2, can perform BLE communication with the tablet C1.

[0069] (2-4) Scene control in lighting control systems Each lighting device A1 in the lighting control system S1 stores multiple scene information in the storage unit 13. Each of the multiple scene information includes lighting-related information that specifies at least one of the following: illumination light intensity (dimming level), light color (color temperature, etc.), and irradiation direction, and mode specification information that specifies one control mode from among multiple control modes.

[0070] The multiple control modes include a sensor control mode in which the control unit 14 controls the power supply unit 11 of the lighting device A1 based on control commands (control commands based on detection results) transmitted wirelessly by the sensor device B1 and scene information, and a normal control mode in which the control unit 14 controls the power supply unit 11 based on scene information. In the normal control mode, the sensor device B1 does not need to perform detection operations.

[0071] Furthermore, the sensor control modes include a constant brightness mode, a human detection mode, and a brightness and human detection mode. The constant brightness mode is a mode in which the control unit 14 controls the power supply unit 11 to match the brightness detected by the sensor device B1 to a predetermined target value. The human detection mode is a mode in which the control unit 14 controls the power supply unit 11 in accordance with a control command based on the determination result of the presence or absence of a person by the sensor device B1. The brightness and human detection mode is a mode in which the control unit 14 controls the power supply unit 11 in accordance with the brightness detected by the sensor device B1 and a control command based on the determination result of the presence or absence of a person. Note that multiple scene information is assigned a unique scene number, and each scene information is identified by its scene number.

[0072] [Table 1]

[0073] Table 1 shows examples of scene information. For example, in zone ZNn1 of area ARn, the scene information for scene number 1 includes lighting-related information that sets the dimming level of the two lighting devices A1 to 80% and the light color to daylight, as well as mode specification information that sets sensor device B1 and the two lighting devices A1 to normal control mode. The scene information for scene number 2 does not include the dimming level of the two lighting devices A1 in the scene information, but includes lighting-related information that sets the light color to neutral white, and mode specification information that sets sensor device B1 and the two lighting devices A1 to sensor control mode (constant brightness mode). Similarly, the scene information for scene numbers 3 to 7 includes the lighting-related information and mode specification information shown in Table 1, respectively. However, the examples shown in Table 1 are just examples of scene information, and depending on the type of lighting device A1 belonging to each area ARi and each zone ZNj, there may be no light color (color tuning) item, or there may be an item for illumination direction (upward, downward).

[0074] Here, tablet C1 can set different control settings for each of the six operation buttons C21 to C26 on the handheld remote control C2. For example, tablet C1 can set control settings for the four operation buttons C21 to C24 of the handheld remote control C2 to select four different scene information (scene information with scene numbers 1 to 4), and set control settings for one operation button C25 to turn off and the remaining operation button C26 to turn on.

[0075] The handheld remote control C2 (control device 5) stores the control settings configured on the tablet C1 for multiple operation buttons C21 to C26 in the built-in memory of the microcontroller that constitutes the control unit 51.

[0076] The handheld remote control C2 (control device 5) receives operation inputs (equivalent to trigger inputs) corresponding to operation buttons C21 to C26 when operation buttons C21 to C26 are pressed, and these inputs are received by the input receiving unit 50. For example, when the input receiving unit 50 receives an operation input corresponding to operation button C21, the control unit 51 reads the control content for selecting scene information for scene number 1 from the built-in memory and transmits the read control content (a control command to select scene information for scene number 1) via mesh communication to a nearby node (for example, sensor device B1 in area AR1).

[0077] Upon receiving a control command transmitted from the handheld remote control C2 (control device 5), sensor device B1 confirms the destination of the received control command and performs mesh communication to transmit the wireless signal (a wireless signal including the control command) to all nodes Nij belonging to the destination. For example, if the destination is all nodes belonging to area AR1, the wireless signal is transmitted to all nodes Nij belonging to area AR1 (a total of 16 lighting devices A1 and 2 sensor devices B1) (see Figure 8). In this case, the destination of the wireless signal is set to mean all nodes Nij belonging to area AR1.

[0078] In each lighting device A1 that receives a wireless signal, if the destination of the wireless signal is either to its own group or to itself, the control unit 14 reads scene information for scene number 1 from the storage unit 13 based on the control command received from the wireless communication unit 12. Then, the control unit 14 controls the power supply unit 11 based on the scene information for scene number 1 that it has read, thereby dimming the light source unit 10 to a dimming level of 80% and adjusting the color of the light source unit 10 to daylight color.

[0079] When controlling a scene using tablet C1 (control device 5), the input receiving unit 50 receives the operation input for scene selection and transmits a control command including the scene number corresponding to the received operation input to an arbitrary management node MNi (for example, sensor device B1 in area AR1) via BLE communication. The management node MNi, upon receiving the wireless signal transmitted from tablet C1, checks the destination of the received wireless signal and performs mesh communication so that the wireless signal (wireless signal including control command) is transmitted to all nodes Nij belonging to the destination. For example, if the destination is all nodes belonging to area AR1, the wireless signal is transmitted to all nodes Nij belonging to area AR1 (a total of 16 lighting devices A1 and 2 sensor devices B1) (see Figure 8). In this case, the destination of the wireless signal is set to mean all nodes Nij belonging to area AR1.

[0080] (2-5) Sensor control in lighting control systems Next, we will explain the operation of the lighting control system S1 when scene information for which a sensor control mode is specified is selected.

[0081] For example, consider a scenario where a control command is sent from the control device 5 (tablet C1 or handheld remote control C2) to two lighting devices A1 and one sensor device B1 belonging to zone ZNn1 of area ARn, instructing them to select scene information for scene number 2. As shown in Table 1, the scene information for scene number 2 includes lighting-related information that sets the light color to daylight white without changing the dimming levels of the two lighting devices A1, and mode specification information that sets sensor device B1 and the two lighting devices A1 to sensor control mode (constant brightness mode).

[0082] In the control device 5, the input receiving unit 50 receives an operation input to select scene information for scene number 2 (Figure 8 [1]). Based on the operation input received by the input receiving unit 50, the control unit 51 of the control device 5 creates a control command to select scene information for scene number 2 (Figure 8 [2]). The control unit 51 passes the created control command to the wireless communication unit 52. The wireless communication unit 52 transmits a message containing the control command received from the control unit 51 to an arbitrary management node MNi (for example, sensor device B1) via BLE communication (Figure 8 [3]).

[0083] When the sensor device B1 receives a message transmitted from the control device 5 via the wireless communication unit 23, it transmits the received message to the two lighting devices A1 via mesh communication (Figure 8 [4]).

[0084] The two lighting devices A1 receive messages transmitted from the sensor device B1 via the wireless communication unit 12. The control units 14 of the two lighting devices A1 read scene information for scene number 2, as indicated by the received message, from the storage unit 13. Based on the read scene information, the control unit 14 controls the power supply unit 11 to set the color of the illumination light to daylight white (Figure 8 [5]).

[0085] Meanwhile, after sending a message to the two lighting devices A1, the sensor control unit 22 of the sensor device B1 reads the scene information for scene number 2, as instructed by the message received from the control device 5, from the storage unit 24. Since the scene information for scene number 2 specifies a constant brightness sensor control mode as mode specification information, the sensor control unit 22 operates the brightness detection unit 20 to detect (measure) the brightness (illuminance) of the detection target area (Figure 8 [6]). The sensor control unit 22 compares the brightness (brightness signal) detected by the brightness detection unit 20 with the target value (reference voltage value). Then, the sensor control unit 22 creates a message (control command) to adjust the dimming level so as to reduce the difference between the detected brightness and the target value. The sensor control unit 22 transmits the created message (control command) to the two lighting devices A1 via mesh communication from the wireless communication unit 23 (Figure 8 [7]).

[0086] The two lighting devices A1 receive messages transmitted from the sensor device B1 via the wireless communication unit 12. The control units 14 of the two lighting devices A1 control the power supply unit 11 to increase or decrease the dimming level of the lighting light based on the received messages (control commands) (Figure 8 [8]).

[0087] After the sensor device B1 sends a message to the two lighting devices A1, it operates the brightness detection unit 20 again to detect (measure) the brightness (illuminance) of the area to be detected (Figure 8 [9]). The sensor control unit 22 compares the brightness (brightness signal) detected by the brightness detection unit 20 with the target value (reference voltage value), and if the difference between the two is not within a predetermined range, it creates a message (control command) to adjust the dimming level to reduce the difference. On the other hand, if the difference between the two is within a predetermined range, the sensor control unit 22 creates a message (control command) to maintain the current dimming level. The sensor control unit 22 transmits the created message (control command) to the two lighting devices A1 via mesh communication from the wireless communication unit 23 (Figure 8

[10] ).

[0088] Subsequently, sensor control is repeatedly performed using the sensor device B1 to control the two lighting devices A1 so that the difference between the brightness detected by the brightness detection unit 20 and the target value is kept within a predetermined range.

[0089] Furthermore, if the human detection mode is selected instead of the constant brightness mode for sensor control, the sensor control unit 22 of sensor device B1 controls lighting device A1 to lower the dimming level when the human detection unit 21 does not detect a person, and controls lighting device A1 to raise the dimming level when the human detection unit 21 detects a person. Furthermore, the sensor control unit 22 of sensor device B1 does not instruct lighting device A1 to lower the dimming level until a certain period of time has elapsed since the human detection unit 21 stopped detecting a person, and if the human detection unit 21 does not detect a person within that period of time, it controls lighting device A1 to lower the dimming level.

[0090] Furthermore, if a mode combining brightness detection and human detection is selected as the sensor control, the sensor control unit 22 of the sensor device B1 controls the lighting device A1 to increase the dimming level when the human detection unit 21 detects a person. In addition, the sensor control unit 22 controls the lighting device A1 to keep the difference between the detection result (brightness) of the brightness detection unit 20 and the target value within a predetermined range when a person is detected (including the time until a certain period of time has elapsed since human detection stopped).

[0091] (2-6) Schedule control in lighting control systems Next, we will explain the operation of schedule control by the scheduling device D1 in the lighting control system S1.

[0092] As an example, let's assume that the schedule storage unit 41 of the scheduling device D1 stores a schedule that sequentially selects scene information for scene number 2 from 9:00 AM to 10:00 AM, and scene information for scene number 3 from 10:00 AM to 1:00 PM, and we will explain the case of controlling zone ZNn1.

[0093] In the scheduling device D1, the scheduling control unit 42 refers to the clock data obtained from the clock unit 40 and the schedule stored in the schedule storage unit 41, and when the current time in the clock data matches 9:00 AM, it passes the schedule specification information (scene number 2) to the wireless communication unit 43 (Figure 9 [1]). The wireless communication unit 43 of the scheduling device D1 transmits a message containing the specification information received from the scheduling control unit 42 to the sensor device B1 and the two lighting devices A1 via mesh communication (Figure 9 [2]).

[0094] The two lighting devices A1 receive messages transmitted from the scheduling device D1 via the wireless communication unit 12. The control units 14 of the two lighting devices A1 read the scene information for scene number 2, as indicated by the received message, from the storage unit 13. Based on the read scene information, the control unit 14 controls the power supply unit 11 to set the color of the illumination light to daylight white (Figure 9 [3]).

[0095] Meanwhile, the sensor control unit 22 of the sensor device B1 reads the scene information for scene number 2, as instructed by the message received from the scheduling device D1, from the storage unit 24. Since the scene information for scene number 2 specifies a constant brightness sensor control mode as mode specification information, the sensor control unit 22 operates the brightness detection unit 20 to detect (measure) the brightness (illuminance) of the area to be detected (Figure 9 [4]). The sensor control unit 22 compares the brightness (voltage value) detected by the brightness detection unit 20 with the target value (reference voltage value). Then, the sensor control unit 22 creates a message (control command) to adjust the dimming level so as to reduce the difference between the detected brightness and the target value. The sensor control unit 22 transmits the created message (control command) to the scheduling device D1 via mesh communication from the wireless communication unit 23 (Figure 9 [5]).

[0096] The scheduling device D1 receives a message (control command) from the sensor device B1 and transmits a message containing the control command from the sensor device B1 to the two lighting devices A1 at the appropriate time (Figure 9 [6]).

[0097] The two lighting devices A1 receive messages transmitted from the scheduling device D1 via the wireless communication unit 12. The control units 14 of the two lighting devices A1 control the power supply unit 11 to increase or decrease the dimming level of the lighting light based on the received messages (control commands) (Figure 9 [7]).

[0098] Subsequently, sensor control is repeatedly performed using the sensor device B1 to control the two lighting devices A1 so that the difference between the brightness detected by the brightness detection unit 20 and the target value is kept within a predetermined range.

[0099] The schedule control unit 42 passes the schedule specification information (scene number 3) to the wireless communication unit 43 when the current time obtained from the clock unit 40 matches 10:00 AM (Figure 9 [8]). The wireless communication unit 43 of the schedule device D1 transmits a message containing the specification information received from the schedule control unit 42 to the sensor device B1 and the two lighting devices A1 via mesh communication (Figure 9 [9]).

[0100] The two lighting devices A1 receive messages transmitted from the scheduling device D1 via the wireless communication unit 12. The control units 14 of the two lighting devices A1 read the scene information for scene number 3, as indicated by the received message, from the storage unit 13. Based on the read scene information, the control unit 14 controls the power supply unit 11 to set the dimming level of the illumination light to 60% and the color of the illumination light to white (Figure 9

[10] ).

[0101] Meanwhile, the sensor control unit 22 of the sensor device B1 reads the scene information for scene number 3, as instructed by the message received from the scheduling device D1, from the storage unit 24. Since the normal control mode is specified as the mode specification information in the scene information for scene number 3, the sensor control unit 22 stops brightness detection by the brightness detection unit 20 (Figure 9

[11] ).

[0102] As described above, the lighting control system S1 performs schedule control by the scheduling device D1 based on a predetermined schedule, thus eliminating the need for human operation and improving ease of use.

[0103] (2-7) Calibration operation of the brightness detection unit By the way, in order for the lighting control system S1 to have the sensor device B1 perform constant brightness sensor control (first sensor control mode), it is necessary to calibrate the detection result (voltage value of the brightness signal) of the brightness detection unit 20. That is, when external light (such as sunlight coming in through a window) shines into the illuminated space and the illuminance of the detection target (floor surface, desk surface, etc. in the illuminated space) changes, the brightness detection unit 20 needs to detect this change and be able to determine the dimming level at that time. Therefore, it is necessary to set in advance the correlation between the brightness (voltage value) detected by the brightness detection unit 20 and the actual brightness of the illuminated space (dimming level of lighting device A1), and this process is called calibration. The calibration of the brightness detection unit 20 (second sensor control mode) involves turning on all lighting devices A1 installed in the lighting space (excluding non-dimmable lighting devices A1) at multiple dimming levels (for example, 100% and 5% (lower limit of dimming level)) when no ambient light is illuminating the lighting space. Based on the detection results (voltage values) of the brightness detection unit 20 at each time, the correlation between the voltage value detected by the brightness detection unit 20 (detection result) and the dimming level is stored in the storage unit 24 of the sensor device B1. Then, in constant brightness sensor control, the relationship between the voltage value of brightness and the dimming level determined by calibration is referred to, and the brightness of the lighting space is determined from the detection results (voltage values) of the brightness detection unit 20. If there is a difference between the determined brightness and the target value (target value of the dimming level), the lighting devices A1 are controlled so that the difference is kept within a predetermined range. For example, if the target dimming level is 70%, and the brightness of the illuminated space, as determined by the detection result of the brightness detection unit 20, is 50%, the control unit 14 of the lighting device A1 controls the power supply unit 11 so that the brightness reaches the target value of 70%.

[0104] Furthermore, during calibration, the sensor control unit 22 and the control unit 14 of the lighting device A1 do not accept any control commands other than those related to calibration transmitted from the control device 5 (tablet C1), such as control commands instructing changes to the dimming level during calibration or cancellation of calibration (specific control commands). Therefore, the lighting control system S1 can perform accurate calibration by suppressing control to unintended lighting conditions during calibration, and consequently, can achieve highly accurate constant brightness control.

[0105] The calibration operation of the brightness detection unit 20 will be explained below with reference to the sequence diagrams in Figures 10 and 11. However, the processes [1] to

[12] in Figure 11 are the same as the processes [1] to

[12] in Figure 10.

[0106] If calibration is not performed, the sensor control unit 22 of sensor device B1 is not executing any sensor control mode. Therefore, when a wireless signal containing an arbitrary control command (for example, a control command instructing the selection of a first sensor control mode) is transmitted from the control device 5 (tablet C1 and handheld remote control C2) (Figure 10 [1]), the sensor control unit 22 of sensor device B1 executes the first sensor control mode based on the received control command (Figure 10 [2]).

[0107] Similarly, if calibration has not been performed on lighting device A1, the control unit 14 of lighting device A1 is running in a first control mode (e.g., normal control mode). Therefore, when a radio signal containing an arbitrary control command is transmitted from scheduling device D1 ([1] in Figure 10), the control unit 14 of lighting device A1 controls the power supply unit 11 based on the received control command ([3] in Figure 10).

[0108] The control device 5 (tablet C1) transmits a wireless signal containing a control command instructing the sensor device B1 to start calibration to an arbitrary management node (e.g., scheduling device D1) via BLE communication (Figure 10 [4]).

[0109] When the scheduling device D1 receives a control command to start calibration transmitted from the control device 5 via the wireless communication unit 43, it confirms the destination and transmits it to the sensor device B1 via mesh communication (Figure 10 [5]).

[0110] The sensor control unit 22 of the sensor device B1 switches to calibration mode based on the control command received from the control device 5 (Figure 10 [6]).

[0111] When calibrating the sensor device B1, the control device 5 (tablet C1) specifies all lighting devices A1 as the destination of the control command to send a control command to all lighting devices A1 that sets the control mode of all lighting devices A1 to the second control mode (calibration mode) and controls the dimming level to a level suitable for calibration (e.g., 100%), and transmits it via BLE communication to any management node (e.g., scheduling device D1) (Figure 10 [7]).

[0112] When the scheduling device D1 receives a control command transmitted from the control device 5 via the wireless communication unit 43, it confirms the destination and transmits it to all lighting devices A1 via mesh communication (Figure 10 [8]).

[0113] The control unit 14 of the lighting device A1 switches to a second control mode (calibration mode) based on a control command and controls the power supply unit 11 to set the dimming level to a specified level (for example, 100%) (Figure 10[9]).

[0114] The control device 5 (tablet C1) transmits a wireless signal via BLE communication to any management node (e.g., scheduling device D1) that includes a control command instructing the sensor device B1 to start the first brightness detection for calibration (

[10] in Figure 10).

[0115] When the scheduling device D1 receives a control command from the control device 5 to start the first brightness detection for calibration via the wireless communication unit 43, it confirms the destination and transmits it to the sensor device B1 via mesh communication (Figure 10

[11] ).

[0116] The sensor control unit 22 of the sensor device B1 performs the first brightness detection for calibration based on the control command (

[12] in Figure 10).

[0117] Here, suppose that during calibration, a control command for lighting control, for example, a control command instructing the execution of scene control for scene number 3, is transmitted from the scheduling device D1 (Figure 11

[13] ). The sensor control unit 22 of the sensor device B1 ignores the control command received from the scheduling device D1 and continues to execute the calibration because calibration is in progress (Figure 11

[14] ). The control unit 14 of the lighting device A1 ignores the control command received from the scheduling device D1 and does not change the lighting state because calibration mode (second control mode) is in progress (Figure 11

[15] ).

[0118] During calibration, all lighting devices A1 are controlled to their rated dimming levels, and then brightness detection is performed multiple times at different dimming levels to derive the correlation between the dimming level and the brightness detection result (voltage value). Therefore, processes [7] to

[12] in Figure 10 are repeated as many times as necessary to derive the correlation.

[0119] After completing the brightness detection for calibration as needed, the control device 5 sends a calibration completion instruction to all lighting devices A1 and sensor devices B1. Specifically, the control device 5 sends a control command to all lighting devices A1 to switch them to the first control mode (normal control mode), specifying all lighting devices A1 as the destination of the control command and sending it via BLE communication to an arbitrary management node (for example, scheduling device D1) (

[13] in Figure 10).

[0120] When the scheduling device D1 receives a control mode switching control command transmitted from the control device 5 via the wireless communication unit 43, it confirms the destination and transmits it to all lighting devices A1 via mesh communication (

[14] in Figure 10).

[0121] The control unit 14 of the lighting device A1 switches to a first control mode (normal control mode) based on a control command. At this time, the control unit 14 may continue to light the light source unit 10 at the original dimming level, or it may control the power supply unit 11 to set the dimming level to 100%, or less than 100% (for example, 70%) (Figure 10

[15] ).

[0122] Furthermore, the control device 5 (tablet C1) transmits a wireless signal containing a control command to indicate the end of calibration to any management node (e.g., scheduling device D1) via BLE communication (Figure 10

[16] ).

[0123] When the scheduling device D1 receives a control command for the completion of calibration transmitted from the control device 5 via the wireless communication unit 43, it confirms the destination and transmits it to the sensor device B1 via mesh communication (Figure 10

[17] ).

[0124] The sensor control unit 22 of sensor device B1 completes calibration and stops brightness detection based on a control command (a specific control command). Upon receiving the control command to complete calibration, the sensor control unit 22 of sensor device B1 stores in the storage unit 24 the correlation between the brightness detection result (voltage value) obtained by the brightness detection unit 20 during the calibration period and the corresponding brightness of the illuminated space (dimming level of the lighting device) (Figure 10

[18] ).

[0125] The control device 5 sends a control command to an arbitrary management node (e.g., scheduling device D1) via BLE communication instructing the sensor device B1 to report the calibration result (Figure 10

[19] ).

[0126] When the scheduling device D1 receives a control command transmitted from the control device 5 via the wireless communication unit 43, it confirms the destination and transmits it to the sensor device B1 via mesh communication (Figure 10

[20] ).

[0127] When the sensor control unit 22 receives a control command instructing it to report the results, it returns information on whether the calibration of the brightness detection unit 20 was successful (Figure 10

[21] ,

[22] ). The control device 5 checks the calibration success or failure result received from the sensor device B1 and determines that the calibration is complete if it was successful (Figure 10

[23] ).

[0128] Furthermore, if the control device 5 receives a response from the sensor device B1 indicating a calibration failure, or if the sensor device B1 does not return a detection result within a predetermined time (for example, a few seconds to tens of seconds) from the time a control command instructing the sensor device B1 to report the calibration results is sent, the control device 5 determines that the calibration has failed. If the control device 5 determines that the calibration has failed, it executes the series of processes from the start of calibration to the confirmation of the results again.

[0129] Once calibration is complete, the control unit 14 of the lighting device A1 executes a first control mode (for example, normal control mode). Therefore, when a wireless signal containing an arbitrary control command is transmitted from the scheduling device D1 (

[24] in Figure 10), the control unit 14 of the lighting device A1 controls the power supply unit 11 based on the received control command (

[26] in Figure 10).

[0130] Similarly, once calibration is complete, sensor device B1 will receive a wireless signal containing an arbitrary control command from scheduling device D1 and operate according to the command (Figure 10

[25] ).

[0131] (2-8) Exceptions in constant brightness control and calibration Here, among the multiple lighting devices A1, there may be a lighting device A1 that may interfere with the brightness detection of the brightness detection unit 20 (hereinafter referred to as "specific lighting device A1"). For example, such a specific lighting device A1 is a lighting device A1 that can emit illumination light toward the ceiling on which the sensor device B1 is installed. When illumination light emitted from the specific lighting device A1 enters the brightness detection unit 20, the brightness detection unit 20 may not be able to correctly detect the brightness of the illuminated space (the brightness of the detection target such as the floor surface or desk surface) (there is a possibility that it will interfere with the brightness detection of the brightness detection unit 20). For this reason, it is preferable for the lighting control system S1 to either limit the illumination direction of the specific lighting device A1 downwards during the calibration of the brightness detection unit 20, or to turn off the specific lighting device A1.

[0132] Furthermore, in the calibration of the brightness detection unit 20, the calibration may target an area ARi where dimmable lighting devices A1 and non-dimmable lighting devices A1 (hereinafter referred to as non-dimmable lighting devices A1) are mixed. In this case, performing calibration with the non-dimmable lighting devices A1 lit may interfere with the brightness detection of the brightness detection unit 20. Therefore, it is preferable for the lighting control system S1 to turn off the non-dimmable lighting devices A1 during calibration.

[0133] However, the lighting control system S1 stores in the memory unit 13 of each lighting device A1 information regarding the feasibility of constant brightness control and calibration, that is, light source identification information that allows for the determination of whether or not the light source unit 10 can be turned on and dimmed during constant brightness control and calibration. Here, it is preferable that the light source identification information is stored in the memory unit 13 in a form that includes the irradiation direction of the light source unit 10 (ceiling surface, floor surface, etc.) and information regarding whether or not dimming is possible. Note that the lighting device A1 is shipped with the light source identification information in the memory unit 13 set during the manufacturing process.

[0134] Next, the operation of the control unit 14 of the lighting device A1 will be explained with reference to the flowchart in Figure 12.

[0135] First, the control unit 14 determines whether the content of the control command included in the wireless signal received by the wireless communication unit 12 is related to brightness detection by the brightness detection unit 20 (i.e., whether it is a specific control command), specifically whether it is constant brightness control or calibration of the brightness detection unit 20 (see step SP1 in Figure 12).

[0136] If the control command is not for constant brightness control or calibration (i.e., not a specific control command), the control unit 14 performs control according to the content of the control command, for example, switching control that controls the power supply unit 11 to switch the light source unit 10 from off to on (see step SP5 in Figure 12). On the other hand, if the control command is for constant brightness control or calibration (i.e., a specific control command), the control unit 14 refers to the light source identification information in the storage unit 13 (see step SP2 in Figure 12). By referring to the light source identification information, the control unit 14 determines whether or not the light source unit 10 interferes with the brightness detection of the brightness detection unit 20 (see step SP3 in Figure 12).

[0137] If the light source identification information determines that it will not interfere with brightness detection, the control unit 14 of the dimmable lighting device A1 controls the power supply unit 11 according to the content of the control command. Specifically, the control unit 14 performs constant brightness control or calibration as described above (see step SP5 in Figure 12).

[0138] On the other hand, if the light source identification information determines that it will interfere with brightness detection, that is, if it is either a specific lighting device A1 or a non-dimmable lighting device A1, the control unit 14 of the specific lighting device A1 and the non-dimmable lighting device A1 will control either the light source unit 10 or the power supply unit 11 to a predetermined control (for example, an off state) unrelated to the content of the control command, so as not to interfere with brightness detection by the brightness detection unit 20. (Step SP4 in Figure 12).

[0139] (2-8) Advantages of lighting control systems As described above, the lighting control system S1 causes the control unit 14 of the lighting device A1, which may interfere with the brightness detection of the brightness detection unit 20, to control either the light source unit 10 or the power supply unit 11 so as not to interfere with the brightness detection of the brightness detection unit 20. As a result, the lighting control system S1 can suppress the occurrence of malfunctions in brightness detection.

[0140] Furthermore, when the lighting control system S1 receives a specific control command, it instructs the control unit 14 to control the power supply unit 11 so as not to interfere with the brightness detection of the brightness detection unit 20, by setting the light intensity of the illumination light emitted by the light source unit 10 to zero (turning it off) in a specific irradiation direction (for example, the direction of the ceiling). As a result, the lighting control system S1 can further suppress the occurrence of malfunctions in brightness detection. In the case of a specific lighting device A1, instead of turning it off, the control unit 14 may control the power supply unit 11 to set the light intensity of the illumination light to a value close to zero (for example, the lower limit of dimming).

[0141] Here, when the control unit 14 of a specific lighting device A1 and lighting devices A1 other than the non-dimmable lighting device A1 controls the power supply unit 11 based on a specific control command, it is preferable that the control unit 11 does not control the power supply unit 11 based on control commands other than those related to sensor control. Control commands related to sensor control include, for example, a command to change the target value of brightness in constant brightness control, and a command to terminate sensor control.

[0142] For example, as explained in "(2-6) Calibration Operation of Brightness Detection Unit," suppose a control command for lighting control, such as a control command instructing the execution of scene control for scene number 3, is transmitted from the scheduling device D1 during the execution of calibration (Figure 11

[13] ). The sensor control unit 22 of the sensor device B1 ignores the control command received from the scheduling device D1 and continues the execution of calibration because calibration is in progress (Figure 10

[14] ). The control unit 14 of the lighting device A1 ignores the control command received from the scheduling device D1 and does not change the lighting state because calibration mode (second control mode) is in operation (Figure 11

[15] ).

[0143] Furthermore, it is preferable that the control unit 14 of a specific lighting device A1 and a non-dimmable lighting device A1 does not control the power supply unit 11 based on control commands other than those related to sensor control (i.e., does not turn on the power supply unit 11) when it is not controlling the power supply unit 11 based on a control command to start sensor control (i.e., it has turned it off). Control commands related to sensor control include, for example, a command to change the target value of brightness in constant brightness control, and a command to terminate sensor control. In other words, if a malfunction occurs during calibration, the lighting control system S1 can forcibly interrupt the calibration.

[0144] However, when the lighting control system S1 causes the control unit 14 to control the power supply unit 11 based on a control command to start sensor control, as described above, it does not cause the control unit 14 to control the power supply unit 11 based on control commands other than those related to sensor control. Therefore, the lighting control system S1 does not change the light intensity of the light source unit 10 during calibration, and can further suppress the occurrence of malfunctions in brightness detection.

[0145] Incidentally, the lighting control system S1 stores the light source identification information in the memory unit 13 as non-rewritable in each lighting device A1, but the light source identification information stored in the memory unit 13 may be made rewritable. The rewriting of the light source identification information can be performed, for example, using the tablet C1.

[0146] However, if the lighting control system S1 allows the light source identification information stored in the memory unit 13 of the lighting device A1 to be rewritten, then if incorrect light source identification information is stored in the memory unit 13 of the lighting device A1, the incorrect light source identification information stored in the memory unit 13 can be rewritten with the correct light source identification information. As a result, the lighting control system S1 can improve the reliability of lighting control.

[0147] For example, among multiple lighting devices A1, there may be a lighting device A1 whose illumination direction is variable, like a spotlight. Such a lighting device A1 with a variable illumination direction comprises a main body installed on the ceiling and a lamp body supported so as to be rotatable horizontally and vertically relative to the main body. The lamp body houses the light source unit 10, and the lamp body is supported by the main body via an arm. The power supply unit 11, wireless communication unit 12, storage unit 13, and control unit 14 are housed in the main body.

[0148] As described above, the variable-direction lighting device A1 has a varying degree of influence on the accuracy of brightness detection by the brightness detection unit 20 depending on the direction of illumination. For example, when the brightness detection unit 20 is detecting the brightness of the floor or desk surface, if the variable-direction lighting device A1 is shining illumination light onto the floor or desk surface, the brightness detection unit 20 can mainly detect reflected light from the floor or desk surface, and the influence on the accuracy of brightness detection is considered to be small. Therefore, in this case, it is determined that the light source identification information stored in the memory unit 13 of the variable-direction lighting device A1 does not interfere with the brightness detection of the brightness detection unit 20.

[0149] On the other hand, when the brightness detection unit 20 is detecting the brightness of the floor or desk surface, if the variable-direction lighting device A1 is shining its illumination light directly onto the ceiling surface, which is the direction in which the brightness detection unit 20 is directly illuminated, it is considered that this will have a significant impact on the accuracy of the brightness detection unit 20. Therefore, in this case, it is determined that the light source identification information stored in the memory unit 13 of the variable-direction lighting device A1 will interfere with the brightness detection of the brightness detection unit 20. The variable-direction lighting device A1 may also have the control unit 14 rewrite the light source identification information stored in the memory unit 13 according to the angle (elevation angle) of the light fixture relative to the main body.

[0150] However, since the lighting control system S1 rewrites the light source identification information stored in the memory unit 13 according to the irradiation direction of the light source unit 10, it can further suppress the occurrence of malfunctions in brightness detection even when a lighting device A1 with a variable irradiation direction is included.

[0151] Furthermore, the lighting control system S1 has the control device (scheduling device D1) transmit a message via wireless signal that includes control commands related to sensor control (such as control commands to start sensor control, and control commands to start and end calibration) and control commands other than those related to sensor control (for example, switching the light source unit 10 on and off, dimming, color adjustment, switching the irradiation direction, etc.). The control unit 14 of each lighting device A1 and the sensor control unit 22 of the sensor device B1 each read scene information corresponding to the scene number included in the wireless signal received by the wireless communication unit 12 from their respective storage units 13 and 24. Then, the control unit 14 and the sensor control unit 22 operate according to the read scene information. For example, if the scene number indicated in the received message is scene information for scene number 2, the control unit 14 controls the power supply unit 11 based on the scene information for scene number 2 so as not to change the dimming level of the illumination light and to make the color of the illumination light daylight white. Furthermore, since the sensor control unit 22 has specified a constant brightness sensor control mode in the scene information for scene number 2, it operates the brightness detection unit 20 to detect the brightness of the area to be detected. The sensor control unit 22 then creates a message (control command) to adjust the dimming level so as to reduce the difference between the detected brightness and the target value, and transmits the created message (control command) to each lighting device A1 via mesh communication from the wireless communication unit 23.

[0152] However, the lighting control system S1 can cause the control unit 14 of each lighting device A1 and the sensor control unit 22 of the sensor device B1 to perform appropriate operations by having the control device (scheduling device D1) transmit a wireless signal containing a message with a scene number as a control command. Therefore, the lighting control system S1 does not need to send wireless signals individually from the scheduling device D1 to each lighting device A1 and sensor device B1, thus shortening messages in wireless communication (BLE communication, mesh communication) and suppressing wireless communication congestion. Furthermore, even when the control device 5, which is implemented by the handy remote control C2, transmits a wireless signal containing a scene number as a control command, the lighting control system S1 can similarly cause the control unit 14 and the sensor control unit 22 to perform appropriate operations.

[0153] Here, when the lighting control system S1 receives a control command from the wireless communication unit 12 indicating the end of calibration, it may instruct the control unit 14 to control the power supply unit 11 to return to the state before calibration started, for example, to a state such as turning on or off at an arbitrary dimming level. By instructing the control unit 14 to control the power supply unit 11 to return to the state before calibration started as described above, the lighting control system S1 can improve ease of use.

[0154] (3) Modified lighting control system Next, several modifications of the lighting control system S1 according to the embodiment will be described. However, the basic configuration of the lighting control system S1 of each modification described below is the same as the basic configuration of the lighting control system S1 according to the embodiment. Therefore, components that are common to or substantially common with the basic configuration of the lighting control system S1 according to the embodiment will be denoted by the same reference numerals, and their illustration and description will be omitted as appropriate. In the following description, "substantially common components" means components that differ slightly in shape, size, etc., but have the same function.

[0155] (3-1) Variation 1 The lighting control system S1 in Modified Example 1 includes control commands corresponding to light source identification information in a specific control command. The control unit 14 of the lighting device A1 in Modified Example 1 controls at least one of the light source unit 10 and the power supply unit 11 according to the control commands included in the specific control command that match the light source identification information stored in the storage unit 13.

[0156] The operation of the control unit 14 in the modified example 1 will be explained with reference to the flowchart in Figure 13.

[0157] In Modification 1, when the control unit 14 receives a wireless signal from the wireless communication unit 12 (see step SP1 in Figure 13), it refers to the light source identification information stored in the memory unit 13 (see step SP2 in Figure 13). Then, in Modification 1, the control unit 14 controls at least one of the light source unit 10 and the power supply unit 11 according to the control command corresponding to the light source identification information (see step SP3 in Figure 13).

[0158] In the lighting control system S1 of Modified Example 1, the control device 5 determines a control state for each light source identification information that does not interfere with the brightness detection of the brightness detection unit 20, and transmits a wireless signal including a control command from the control device 5. Therefore, the control unit 14 in Modified Example 1 only needs to control at least one of the light source unit 10 and the power supply unit 11 according to the control command corresponding to the light source identification information stored in the storage unit 13. In the case of the light source unit 10 which is determined not to interfere with brightness detection based on the light source identification information, for example, the control unit 14 in Modified Example 1 controls the power supply unit 11 to dim the light source unit 10 to a dimming level specified by a specific control content (such as a 100% dimming level).

[0159] On the other hand, if the light source unit 10 is determined to interfere with brightness detection based on the light source identification information, for example, the control unit 14 in Modified Example 1 controls at least one of the light source unit 10 and the power supply unit 11 to set the amount of light irradiated onto the ceiling surface to zero or close to zero, according to the control command. Therefore, the lighting control system S1 of Modified Example 1 can perform more flexible lighting control while suppressing the occurrence of malfunctions in brightness detection.

[0160] (3-2) Modification 2 The lighting control system S1 of the modified example 2 is characterized by the configuration of at least one of the multiple lighting devices A1.

[0161] One of the lighting devices A1 in the modified example 2 comprises a luminaire A10 and a terminal device A11, as shown in Figure 14. The luminaire A10 has a light source unit 10 and a power supply unit 11. The terminal device A11 has a wireless communication unit 12, a storage unit 13, a control unit 14, and an opening / closing unit 15.

[0162] The luminaire A10 has an outer casing made of synthetic resin or metal. The luminaire A10 houses the light source unit 10 and the power supply unit 11 within its outer casing. The terminal device A11 has a case made of synthetic resin or metal. The terminal device A11 is detachably attached, for example, to a wiring duct installed on the ceiling. The luminaire A10 is also detachably attached to the terminal device A11. Note that the luminaire A10 may be a commercially available lighting fixture such as a spotlight or pendant light.

[0163] The power supply unit 11 is electrically connected to the power supply path P11 of the external power supply P1 via the terminal device A11 and the wiring duct. The switch 15 is inserted into the power supply path P11 and configured to open and close the power supply path P11. The switch 15 includes, for example, an electromagnetic relay and a drive circuit that drives the electromagnetic relay. The control unit 14 controls the switch 15 in place of the power supply unit 11 based on control commands included in the wireless signal.

[0164] In this modified example 2, the lighting device A1 is only switched on and off by opening and closing the opening / closing unit 15, and therefore corresponds to a non-dimmable lighting device A1. Accordingly, the light source identification information in the memory unit 13 is stored in a form that includes information that it is not dimmable. Therefore, when the control unit 14 receives a control command to start sensor control, it refers to the light source identification information in the memory unit 13 and, if it determines that it will interfere with the brightness detection of the brightness detection unit 20, it controls the opening / closing unit 15 to turn off the power supply path P11.

[0165] However, the lighting control system S1 of the modified example 2 includes a lighting device A1 which is divided into a luminaire A10 and a terminal device A11. For example, commercially available lighting fixtures can be used as the luminaire A10, thereby improving ease of use.

[0166] (3-3) Modified example 3 The lighting control system S1 of Modification 3 further includes a load control device 6 (see Figure 15). The load control device 6 in Modification 3 controls a load configured to affect the lighting conditions in the lighting space. Such a load is, for example, an electric blind or electric curtain installed on a window that lets in outside light into the lighting space. The electric blind is configured to receive a wireless signal using infrared or radio waves as a medium and adjust the outside light by moving a plurality of slats vertically or horizontally in accordance with the command contained in the wireless signal. Similarly, the electric curtain is configured to receive a wireless signal using infrared or radio waves and adjust the outside light by moving the curtain in accordance with the command contained in the wireless signal. Since electric blinds and electric curtains are conventionally known, their detailed configurations and illustrations are omitted.

[0167] The load control device 6 includes a wireless communication unit 61 that receives wireless signals, and a load control unit 60 that controls the load (electric blinds or electric curtains) based on control commands contained in the wireless signals. The load control device 6 also includes a signal transmission unit 62 that transmits wireless signals to the load (electric blinds or electric curtains), and a storage unit 63 that stores information such as a pass / fail flag (see Figure 15).

[0168] The wireless communication unit 61, like the wireless communication unit 12 of the lighting device A1, includes a wireless communication circuit, an antenna, and the like. The wireless communication circuit is an integrated circuit configured to perform wireless communication in accordance with the same wireless communication standards as the wireless communication circuit of the wireless communication unit 12. The wireless communication circuit can transmit and receive wireless signals through the antenna.

[0169] The load control unit 60 mainly consists of a microcontroller. The load control unit 60 is configured to perform various processes related to the control of the load (electric blinds or electric curtains) by having the microcontroller's processor execute a load control program.

[0170] The storage unit 63 has a non-volatile semiconductor memory. The storage unit 63 stores load identification information similar to light source identification information (such as information on whether the load state interferes with the brightness detection of the brightness detection unit 20).

[0171] The signal transmission unit 62 transmits signals using infrared rays or radio waves (wireless signals) or signals using electric wires (wired signals) to the electric blinds and electric curtains. The signals transmitted from the signal transmission unit 62 include commands for the electric blinds or electric curtains.

[0172] When the load control unit 60 receives a control command to start sensor control from a wireless signal received by the wireless communication unit 61, it controls the load so that it does not affect the lighting conditions. Specifically, when the load control unit 60 receives a control command to start calibration, it refers to the load identification information in the storage unit 63. The load control unit 60 refers to the load identification information in the storage unit 63 and, if it determines that the load is interfering with the brightness detection of the brightness detection unit 20, it generates a command to close the electric blind or electric curtain and passes it to the signal transmission unit 62. The signal transmission unit 62 transmits a wireless signal containing the command received from the load control unit 60 towards the electric blind or electric curtain.

[0173] When the electric blinds or electric curtains receive a wireless signal transmitted from the load control device 6, they operate to adjust the amount of ambient light to the minimum.

[0174] However, in the lighting control system S1 of the modified example 3, the load control unit 60 is instructed to control the load (electric blinds or electric curtains) so as not to affect the lighting conditions, thereby suppressing the occurrence of malfunctions in brightness detection.

[0175] (4) Lighting control method and program according to the embodiment In the embodiment of the lighting control method, upon receiving a specific control command, the control unit 14 refers to the light source identification information stored in the memory unit 13 and causes the control unit 14 to control at least one of the light source unit 10 and the power supply unit 11 in a manner that does not interfere with the brightness detection of the brightness detection unit 20.

[0176] However, the lighting control method according to this embodiment causes the control unit 14 of the lighting device A1, which may interfere with the brightness detection of the brightness detection unit 20, to control at least one of the light source unit 10 and the power supply unit 11 based on a specific control command, so as not to interfere with the brightness detection of the brightness detection unit 20, thereby suppressing the occurrence of malfunctions in brightness detection.

[0177] Furthermore, the program according to the embodiment is a computer program for causing a computer system to execute the lighting control method according to the embodiment. The computer system in the embodiment can be realized by a microcontroller that constitutes the control unit 14 of the lighting device A1.

[0178] However, the program according to this embodiment can suppress the occurrence of malfunctions in brightness detection.

[0179] (5) Summary A lighting control system (S1) according to a first aspect of the present disclosure comprises a control device (5; tablet C1, handheld remote control C2, scheduling device D1), a sensor device (B1) that can communicate wirelessly with the control device, and a lighting device (A1) that can communicate wirelessly with the control device and the sensor device (B1). The lighting device (A1) includes a light source unit (10) that irradiates lighting light into the lighting space, a power supply unit (11) that supplies power to the light source unit (10), a wireless communication unit (12) that receives wireless signals, a control unit (14) that controls the power supply unit (11) and the light source unit (10) based on control commands included in the wireless signals, and a storage unit (13) that stores light source identification information that can uniquely identify the irradiation direction and dimming capability of the light source unit (10). The sensor device (B1) includes a wireless communication unit (23) that transmits and receives wireless signals, a brightness detection unit (20) that detects the brightness of the illuminated space, and a sensor control unit (22) that controls the wireless communication unit (23) to transmit a wireless signal including the detection result of the brightness detection unit (20) or a wireless signal including a control command for controlling the lighting device (A1) based on the detection result. When the sensor control unit (22) receives a control command related to sensor control from a wireless signal transmitted from the control device and received by the wireless communication unit (23), it causes the brightness detection unit (20) to start brightness detection. When the control unit (14) receives a specific control command included in the control command related to sensor control, it refers to the light source identification information stored in the storage unit (13) and controls at least one of the light source unit (10) and the power supply unit (11) so as not to interfere with brightness detection.

[0180] The lighting control system (S1) according to the first embodiment causes the control unit (14) of the lighting device (A1), which may interfere with the brightness detection of the brightness detection unit (20), to control at least one of the power supply unit (11) and the light source unit (10) so as not to interfere with the brightness detection. As a result, the lighting control system (S1) according to the first embodiment can suppress the occurrence of malfunctions in brightness detection.

[0181] A lighting control system (S1) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the lighting control system (S1) according to the second aspect, it is preferable that a specific control command includes a control command corresponding to light source identification information. It is preferable that the control unit (14) controls at least one of the light source unit (10) and the power supply unit (11) in accordance with a control command among the control commands included in the specific control command that matches the light source identification information stored in the storage unit (13).

[0182] The lighting control system (S1) according to the second embodiment can perform more flexible lighting control while suppressing the occurrence of malfunctions in brightness detection.

[0183] A lighting control system (S1) according to a third aspect of this disclosure can be realized by combining it with the first aspect. In the lighting control system (S1) according to the third aspect, it is preferable that a specific control command includes a control command corresponding to a representative portion of the light source identification information. It is preferable that the control unit (14) controls the light source unit (10) to a predetermined state that does not interfere with brightness detection, even if the control command included in the specific control command does not match the light source identification information stored in the storage unit (13).

[0184] The lighting control system (S1) according to the third embodiment can further suppress the occurrence of malfunctions in brightness detection by controlling the light source unit (10) to a predetermined state (for example, an off state) that does not interfere with brightness detection, even if the control command does not match the light source identification information.

[0185] A lighting control system (S1) according to a fourth aspect of this disclosure can be realized in combination with any of the first to third aspects. In the lighting control system (S1) according to the fourth aspect, when the control unit (14) receives a specific control command, it is preferable to control the power supply unit (11) so as to set the amount of illumination light to zero or a value close to zero so as not to interfere with brightness detection.

[0186] The lighting control system (S1) according to the fourth embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0187] A lighting control system (S1) according to a fifth aspect of this disclosure can be realized in combination with any of the first to third aspects. In the lighting control system (S1) according to the fifth aspect, when the control unit (14) is controlling the power supply unit (11) based on a specific control command, it is preferable that the control unit (14) does not control the power supply unit (11) based on control commands other than control commands related to sensor control.

[0188] The lighting control system (S1) according to the fifth embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0189] A lighting control system (S1) according to a sixth aspect of this disclosure can be realized in combination with any of the first to fifth aspects. In the lighting control system (S1) according to the fourth aspect, if the control unit (14) is not controlling the power supply unit (11) based on a specific control command, it is preferable that the control unit (14) does not control the power supply unit (11) based on control commands other than control commands related to sensor control.

[0190] The lighting control system (S1) according to the sixth embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0191] A lighting control system (S1) according to a seventh aspect of this disclosure can be realized in combination with a fifth aspect. In the lighting control system (S1) according to the seventh aspect, the control commands related to sensor control preferably include a command to terminate sensor control.

[0192] The lighting control system (S1) according to the seventh embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0193] An eighth aspect of the present disclosure of the lighting control system (S1) can be realized in combination with the sixth aspect. In the eighth aspect of the lighting control system (S1), the control commands related to sensor control preferably include a command to terminate sensor control.

[0194] The lighting control system (S1) according to the eighth embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0195] A lighting control system (S1) according to the ninth aspect of this disclosure can be implemented in combination with any of the first to eighth aspects. In the lighting control system (S1) according to the ninth aspect, it is preferable that the light source identification information stored in the storage unit (13) is rewritable.

[0196] The lighting control system (S1) according to the ninth embodiment can overwrite the incorrect light source identification information stored in the memory unit (13) of the lighting device (A1) with the correct light source identification information if incorrect light source identification information is stored in the memory unit (13). As a result, the lighting control system (S1) according to the ninth embodiment can improve the reliability of lighting control.

[0197] A lighting control system (S1) according to a tenth aspect of this disclosure can be realized in combination with a ninth aspect. In the lighting control system (S1) according to the tenth aspect, the light source unit (10) is preferably configured to change the direction of illumination light.

[0198] The lighting control system (S1) according to the tenth embodiment can further suppress the occurrence of malfunctions in brightness detection even when a lighting device (A1) with variable irradiation direction is included.

[0199] An eleventh aspect of the present disclosure, the lighting control system (S1), can be realized in combination with the tenth aspect. In the eleventh aspect of the lighting control system (S1), it is preferable that the light source identification information stored in the memory unit (13) is rewritten according to the direction of illumination.

[0200] The lighting control system (S1) according to the eleventh embodiment can further suppress the occurrence of malfunctions in brightness detection.

[0201] A lighting control system (S1) according to a twelfth aspect of the present disclosure can be realized in combination with any of the first to eleventh aspects. In the lighting control system (S1) according to the twelfth aspect, the lighting device (A1) preferably comprises a luminaire (A10) having a light source unit (10) and a power supply unit (11), and a terminal device (A11). The terminal device (A11) preferably has a wireless communication unit (12), a storage unit (13), a control unit (14), and an opening / closing unit (15). The opening / closing unit (15) is preferably inserted into a power supply path from an external power source (P1) to the power supply unit (11) and is configured to open and close the power supply path. The control unit (14) preferably controls the luminaire (A10) by opening and closing the opening / closing unit (15) instead of the light source unit (10) and power supply unit (11) based on control commands included in the wireless signal.

[0202] The lighting control system (S1) according to the twelfth embodiment can, for example, use commercially available lighting fixtures as luminaires (A10), thereby improving ease of use.

[0203] A lighting control system (S1) according to a thirteenth aspect of the present disclosure can be implemented in combination with any of the first to twelfth aspects. In the lighting control system (S1) according to the thirteenth aspect, the control device preferably transmits a message containing control commands related to sensor control by wireless signal. The control unit (14) and the sensor control unit (22) preferably operate based on the control commands related to sensor control contained in the message.

[0204] The lighting control system (S1) according to the 13th embodiment can suppress wireless communication congestion by shortening messages in wireless communication (BLE communication, mesh communication).

[0205] A lighting control system (S1) according to a 14th aspect of the present disclosure can be realized in combination with any of the first to 13th aspects. In the lighting control system (S1) according to the 14th aspect, the sensor control unit (22) preferably selectively executes a plurality of sensor control modes, including a first sensor control mode and a second sensor control mode. When the sensor control unit (22) is executing the first sensor control mode, it is preferable to control the wireless communication unit (23) to create a control command for controlling the lighting device (A1) based on the detection result of the brightness detection unit (20) and to transmit a wireless signal including the created control command. When the sensor control unit (22) is executing the second sensor control mode, it is preferable to perform calibration using the detection result of the brightness detection unit (20). When the sensor control unit (22) is executing the second sensor control mode, it is preferable to operate in a way that associates the brightness of the lighting space with the detection result of the brightness detection unit (20) through calibration. Preferably, the specific control command includes at least one of a control command that causes the sensor control unit (22) to execute a first sensor control mode and a control command that causes it to execute a second sensor control mode.

[0206] The lighting control system (S1) according to the 14th embodiment can improve the accuracy of brightness detection by the brightness detection unit (20) by performing calibration.

[0207] A lighting control system (S1) according to a 15th aspect of the present disclosure can be realized in combination with a 14th aspect. In the lighting control system (S1) according to the 15th aspect, it is preferable that a sensor control unit (22) executing a first sensor control mode creates a control command to control a lighting device (A1) so as to match the brightness detected by a brightness detection unit (20) to a predetermined target value, and controls a wireless communication unit (23) to transmit a wireless signal including the created control command.

[0208] The lighting control system (S1) according to the 15th embodiment controls the lighting device (A1) so that the brightness detected by the brightness detection unit (20) matches the target value, thereby maintaining a constant brightness in the illuminated space.

[0209] A lighting control system (S1) according to a sixteenth aspect of the present disclosure can be realized in combination with a fourteenth or fifteenth aspect. In the lighting control system (S1) according to the sixteenth aspect, it is preferable that the control unit (14) controls the power supply unit (11) so that when the sensor control unit (22) terminates or cancels the second sensor control mode, the sensor control unit (22) returns to the state before it started the second sensor control mode.

[0210] The lighting control system (S1) according to the 16th embodiment can improve ease of use.

[0211] A lighting control system (S1) according to a 17th aspect of this disclosure can be realized in combination with any of the 1st to 16th aspects. The lighting control system (S1) according to the 17th aspect preferably further comprises a load control device (6) that controls a load configured to affect the lighting conditions in the lighting space. The load control device (6) preferably includes a wireless communication unit (61) that receives a wireless signal and a load control unit (60) that controls the load based on a control command included in the wireless signal. When the load control unit (60) receives a specific control command, it is preferable that the load is controlled so as not to affect the lighting conditions.

[0212] The lighting control system (S1) according to the 17th embodiment can suppress the occurrence of malfunctions in brightness detection.

[0213] A lighting device (A1) according to the 18th aspect of this disclosure is used in a lighting control system (S1) according to any of the 1st to 17th aspects. The lighting device (A1) according to the 18th aspect preferably includes a light source unit (10) that irradiates lighting light into the lighting space, a power supply unit (11) that supplies power to the light source unit (10), a wireless communication unit (12) that receives wireless signals, a control unit (14) that controls the power supply unit (11) based on control commands included in the wireless signals, and a storage unit (13) that stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source unit (10). When the control unit (14) receives a specific control command included in a control command related to sensor control, it is preferable that it refers to the light source identification information stored in the storage unit (13) and controls at least one of the light source unit (10) and the power supply unit (11) in a manner that does not interfere with brightness detection.

[0214] In the lighting device (A1) according to the 18th embodiment, if there is a possibility of interfering with the brightness detection of the brightness detection unit (20), the control unit (14) controls at least one of the light source unit (10) and the power supply unit (11) so as not to interfere with the brightness detection of the brightness detection unit (20). As a result, the lighting device (A1) according to the 18th embodiment can suppress the occurrence of malfunctions in brightness detection.

[0215] The 19th aspect of the present disclosure is a lighting control method in a lighting control system (S1) according to any of the 1st to 17th aspects. When the 19th aspect of the lighting control method receives a specific control command, it refers to light source identification information stored in the memory unit (13) and causes the control unit (14) to control at least one of the light source unit (10) and the power supply unit (11) in a manner that does not interfere with brightness detection.

[0216] The lighting control method according to the 19th embodiment causes the control unit (14) of the lighting device (A1), which may interfere with the brightness detection of the brightness detection unit (20), to control at least one of the light source unit (10) and the power supply unit (11) so as not to interfere with the brightness detection of the brightness detection unit (20). As a result, the lighting control method according to the 19th embodiment can suppress the occurrence of malfunctions in brightness detection.

[0217] A program relating to the 20th aspect of this disclosure causes a computer system to execute a lighting control method relating to the 19th aspect.

[0218] The program according to the 20th embodiment can suppress the occurrence of malfunctions in brightness detection. [Explanation of Symbols]

[0219] S1 Lighting Control System A1 Lighting device A10 light fixture A11 Terminal device B1 Sensor device P1 External power supply P11 Power feed line 5. Control device (tablet C1; handheld remote control C2; scheduling device D1) 6. Load control device 10 Light source section 11 Power supply section 12 Wireless Communication Section 13 Storage section 14 Control Unit 15 Opening / Closing Section 20 Brightness detection unit 22 Sensor Control Unit 23 Wireless Communication Department 60 Load control unit 61 Wireless Communication Section

Claims

1. Control device and The control device and a wireless communication-enabled sensor device, The control device and the sensor device and a lighting device capable of wireless communication with them, Equipped with, The aforementioned lighting device is A light source unit that illuminates the space with illumination light, A power supply unit that supplies power to the light source unit, A wireless communication unit that receives wireless signals, A control unit that controls the power supply unit and the light source unit based on the control commands included in the wireless signal, A storage unit that stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source unit, It has, The aforementioned sensor device is A wireless communication unit that transmits and receives the aforementioned wireless signals, A brightness detection unit for detecting the brightness of the aforementioned illuminated space, A sensor control unit controls the wireless communication unit to transmit the wireless signal including the detection result of the brightness detection unit or the wireless signal including a control command for controlling the lighting device based on the detection result, It has, When the sensor control unit receives a control command related to sensor control via the wireless signal transmitted from the control device and received by the wireless communication unit, it causes the brightness detection unit to start brightness detection. When the control unit receives a specific control command included in the control commands related to the sensor control, it refers to the light source identification information stored in the storage unit and controls at least one of the light source unit and the power supply unit so as not to interfere with the brightness detection. Lighting control system.

2. The aforementioned specific control command includes a control command corresponding to the light source identification information, The control unit controls at least one of the light source unit and the power supply unit in accordance with the control command among the control commands included in the specific control command that matches the light source identification information stored in the storage unit. The lighting control system according to claim 1.

3. The aforementioned specific control command includes a control command corresponding to a representative portion of the aforementioned light source identification information, The control unit controls the light source to a predetermined state that does not interfere with brightness detection, even if the control command included in the specific control command does not match the light source identification information stored in the storage unit. The lighting control system according to claim 1.

4. When the control unit receives the specific control command, it controls the power supply unit to set the amount of illumination light to zero or a value close to zero so as not to interfere with the brightness detection. A lighting control system according to any one of claims 1 to 3.

5. When the control unit is controlling the power supply unit based on the specific control command, it will not control the power supply unit based on any control command other than the control command related to the sensor control. A lighting control system according to any one of claims 1 to 3.

6. If the control unit is not controlling the power supply unit based on the specific control command, it will not control the power supply unit based on any control command other than the control command related to the sensor control. A lighting control system according to any one of claims 1 to 3.

7. The control command related to the sensor control includes a command to terminate the sensor control. The lighting control system according to claim 5.

8. The control command related to the sensor control includes a command to terminate the sensor control. The lighting control system according to claim 6.

9. The light source identification information stored in the memory unit is rewritable. A lighting control system according to any one of claims 1 to 3.

10. The light source unit is configured to allow the direction of illumination of the light to be changed. A lighting control system according to any one of claims 1 to 3.

11. The light source identification information stored in the memory unit is rewritten according to the irradiation direction. The lighting control system according to claim 10.

12. The aforementioned lighting device is A light fixture having the light source unit and the power supply unit, A terminal device having the wireless communication unit, the storage unit, the control unit, and the opening / closing unit, Equipped with, The aforementioned switching unit is configured to be inserted into the power supply path from the external power source to the power supply unit and to open and close the power supply path. The control unit controls the light fixture by opening and closing the opening / closing unit in place of the light source unit and the power supply unit, based on the control command included in the wireless signal. A lighting control system according to any one of claims 1 to 3.

13. The control device transmits a message including the control command related to the sensor control via the wireless signal. The control unit and the sensor control unit each operate based on the control command related to the sensor control contained in the message. A lighting control system according to any one of claims 1 to 3.

14. The sensor control unit selectively executes a plurality of sensor control modes, including a first sensor control mode and a second sensor control mode. While executing the first sensor control mode, the sensor control unit creates a control command for controlling the lighting device based on the detection result of the brightness detection unit, and controls the wireless communication unit to transmit the wireless signal including the created control command. While executing the second sensor control mode, the sensor control unit performs calibration using the detection result of the brightness detection unit, and operates to associate the brightness of the illuminated space with the detection result of the brightness detection unit through the calibration. The specific control command includes at least one of a control command that causes the sensor control unit to execute the first sensor control mode and a control command that causes it to execute the second sensor control mode. A lighting control system according to any one of claims 1 to 3.

15. While executing the first sensor control mode, the sensor control unit creates a control command for controlling the lighting device so that the brightness detected by the brightness detection unit matches a predetermined target value, and controls the wireless communication unit to transmit the wireless signal including the created control command. The lighting control system according to claim 14.

16. The control unit controls the power supply unit to return to the state before the sensor control unit started the second sensor control mode when the sensor control unit terminates or cancels the second sensor control mode. The lighting control system according to claim 14.

17. The system further includes a load control device that controls a load configured to affect the lighting conditions in the aforementioned lighting space, The aforementioned load control device is A wireless communication unit that receives the aforementioned wireless signal, A load control unit that controls the load based on a control command included in the wireless signal, It has, When the load control unit receives the specific control command, it controls the load so as not to affect the lighting conditions. A lighting control system according to any one of claims 1 to 3.

18. A lighting device used in a lighting control system according to any one of claims 1-3, The light source unit irradiates the illumination light into the illumination space, The power supply unit that supplies power to the light source unit, The wireless communication unit that receives the aforementioned wireless signal, The control unit controls the power supply unit based on the control command included in the wireless signal, The storage unit stores light source identification information that uniquely identifies the irradiation direction and dimming capability of the light source, It has, When the control unit receives the specific control command included in the control commands related to the sensor control, it refers to the light source identification information stored in the storage unit and controls at least one of the light source unit and the power supply unit so as not to interfere with the brightness detection. Lighting device.

19. A lighting control method in a lighting control system according to any one of claims 1 to 3, When the aforementioned specific control command is received, the light source identification information stored in the memory unit is referenced, and the control unit is instructed to control at least one of the light source unit and the power supply unit in a manner that does not interfere with brightness detection. Lighting control method.

20. The computer system is made to execute the lighting control method described in claim 19. program.

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