Lighting system and lighting method

Abstract

To achieve miniaturization of lifting devices.SOLUTION: A lighting system includes a lifting device, a lighting device, and a control device. The lifting device includes a reel line extending downward and is configured to change a length of the reel line. The reel line includes a power line for supplying power to the lighting device. The lighting device is connected to the reel line and is configured to lift and lower as the length of the reel line changes, and to cause a light-emitting element to emit light in response to a control signal from the control device. The control device is configured to generate the control signal for controlling the emission of light, and to convert the control signal into a format for wireless transmission. The lighting device is further configured to wirelessly receive the converted control signal from the control device via a base station.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a lighting system and a lighting method, and more particularly to a lighting system and a lighting method for supplying power to a light-emitting element that emits light in stage performances.

Background Art

[0002] In stage performances that support performers in performing works, such as plays, music, and dance, a performance method using a plurality of lighting devices is known (Patent Document 1). In the technique disclosed in Patent Document 1, each of a plurality of elevating devices elevates a lighting device connected by a reel wire, and a three-dimensional performance is performed by controlling the light emission from the lighting device. The plurality of elevating devices are suspended from the ceiling.

Prior Art Documents

[0003]

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described stage performance, in order to make the stage performance more magnificent, a plurality of lighting devices are often used. That is, when the technique disclosed in Patent Document 1 is used, a plurality of elevating devices are suspended from the ceiling. Against this background, suspending a large number of elevating devices places a huge load on the ceiling. In addition, the greater the weight of the elevating device, the greater the risk of the elevating device falling during the stage performance. Furthermore, since the stage performance is visible to the audience, a large size of the elevating device may be aesthetically unfavorable. For this reason, it is desired that the elevating device has a lighter and smaller structure.

Means for Solving the Problems

[0006] A lighting system according to an embodiment includes a lifting device, a lighting device, and a control device. The lifting device includes a reel wire extending downward, and is configured to change the length of the reel wire. The reel wire includes a power line for supplying power to the lighting device. The lighting device is connected to the reel wire and moves up and down as the length of the reel wire changes. The lighting device is configured to emit light from a light-emitting element in response to a control signal from the control device. The control device generates a control signal for controlling the light emission and is configured to convert the control signal into a form for wireless transmission. The lighting device is further configured to wirelessly receive the converted control signal from the control device via a base station.

[0007] Also, a method according to an embodiment is a method executed by a lighting system. The method includes: changing the length of a reel wire extending downward by a lifting device including the reel wire, where the reel wire includes a power line for supplying power to the lighting device; moving up and down a lighting device connected to the reel wire as the length of the reel wire changes, and emitting light from a light-emitting element in response to a control signal from a control device; generating, by the control device, a control signal for controlling the light emission and converting the control signal into a form for wireless transmission; and wirelessly receiving, by the lighting device, the converted control signal from the control device via a base station.

Advantages of the Invention

[0008] According to the lighting system and the lighting method of the present invention, the lifting device can have a lighter and smaller structure.

Brief Description of the Drawings

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MODE FOR CARRYING OUT THE INVENTION

[0009] With reference to the accompanying drawings, the lighting system which concerns on this Embodiment is demonstrated. The lighting system which concerns on this Embodiment is mainly used in stage production which supports an actor to perform a work, such as drama, music, and dance. In such stage production, the lighting system performs a light production by making a light emitting element emit light and controlling the light emission.

[0010] FIG. 12 shows the overall lighting system IS according to the prior art. The lighting system IS includes lifting devices EAa and EAb (hereinafter, the lifting device EA), lighting devices IAa and IAb (hereinafter, the lighting device IA), a control device CT, and a power supply device PS.

[0011] The lifting device EAa has a reel wire RLa provided inside. Similarly, the lifting device EAb has a reel wire RLb provided inside (hereinafter, the reel wire RLa and the reel wire RLb are the reel wire RL). The reel wire RL extends downward from the lifting device EA. A lighting device IA is attached to the tip of the reel wire RL. The lighting device IA is suspended below the lifting device EA. The lifting device EA suspended from the ceiling C is often installed at a height that is not visible or difficult to see from the viewer.

[0012] The lifting device EA raises and lowers the lighting device IA attached to the tip of the reel wire RL by changing the length of the reel wire RL. The lifting device EA is attached to the ceiling C with its longitudinal direction vertical.

[0013] The lighting device IA is a device having one or more light-emitting elements inside. The lighting device IA has a connector at the upper part and is connected to the reel wire RL via the connector.

[0014] The control device CT controls the operations of the lifting device EA and the lighting device IA. The lifting device EA and the control device CT are connected by wire or wirelessly. The control device CT is implemented by a CPU (Central Processing Unit) or an FPGA (Field Programmable Gate Array), etc. The control device CT executes a control program stored in a memory (not shown). The operations of the lifting device EA and the lighting device IA are controlled according to the production data stored in a storage device (not shown) and / or in response to the operator's operation (the control device CT transmits a control signal to the lifting device EA and the lighting device IA). The production data is data that defines the operations of the lifting device EA and the lighting device IA according to a predetermined stage production.

[0015] The control signal from the control device CT is transmitted directly to the lifting device EA. Also, the control signal from the control device CT is transmitted to the lighting device IA through the reel wire RL of the lifting device EA. In this embodiment, the operation of the lighting device IA is controlled according to the control signal transmitted from the control device CT through the reel wire RL.

[0016] The power supply device PS is a power source that supplies power serving as the power source for the lifting device EA and the lighting device IA. The power supply device PS is connected to a power source provided on the ceiling C or the like. The lifting device EA is connected to the power supply device PS via a power cable. The power from the power supply device PS is supplied directly to the lifting device EA. Also, the power from the power supply device PS is supplied to the lighting device IA through the reel wire RL of the lifting device EA.

[0017] FIG. 13 shows the lifting device EA described in FIG. 12. The lifting device EA shown in FIG. Y has its cover CV that covers the interior opened, and the interior is in an exposed state. The lifting device EA has a reel R inside. The reel R has a cylindrical shape and extends in the vertical direction inside the lifting device EA. The reel R rotates about the axis of the short-side face by the drive of a motor (not shown).

[0018] When the reel R rotates in one direction, the reel wire RL is wound around the longitudinal plane of the reel R (hereinafter referred to as the reel wire winding plane). Also, when the reel R rotates in the other direction, the reel wire RL is unwound from the reel wire winding plane. FIG. 14 shows a state where the reel wire RL is wound around the reel wire winding plane. In this way, the elevating device EA changes the length of the reel wire RL and elevates the lighting device IA attached to the tip of the reel wire RL.

[0019] FIG. 15 shows a cross-section of the reel wire RL described in FIGS. 12 to 14. As shown in FIG. 15, the reel wire RL inserts a control line CL for transmitting a control signal to the lighting device IA and a power line PL for supplying power to the lighting device IA.

[0020] Since the elevating device EA shown in FIG. 13 has a structure for winding the reel wire RL around the reel wire winding plane, as the diameter of the cross-section of the reel wire RL increases, it is necessary to increase the diameter in the short direction and / or the length in the longitudinal direction of the reel wire winding surface. The increase in the diameter in the short direction and / or the length in the longitudinal direction of the reel wire winding surface leads to an increase in the size and weight of the elevating device EA.

[0021] In order to make the stage performance more magnificent, more lighting devices IA and more elevating devices EA may be used. When the elevating device EA becomes larger and heavier, a load is applied to the ceiling C when suspending a large number of elevating devices EA, and in some cases, it becomes impossible to suspend more than a predetermined number of elevating devices EA. For this reason, it is desirable to make the elevating device EA lighter and smaller.

[0022] Since the elevating device EA has the above-described structure, in order to make the elevating device EA lighter and smaller, it is necessary to shorten the diameter of the cross-section of the reel wire RL. Also, since the reel wire RL extends downward together with the lighting device IA, it becomes visible to the viewers. From the perspective of the stage performance, the longer the diameter of the cross-section of the reel wire RL, the easier it is for the viewers to see the reel wire RL. For this reason as well, it is preferable to shorten the diameter of the cross-section of the reel wire RL.

[0023] On the other hand, in order to make the stage performance more magnificent, for example, more lighting devices IA may be used for one lifting device EA. In this case, in order to supply more power, it is necessary to increase the diameter of the cross-section of the power line PL.

[0024] The reel wire RL includes a control line CL and a power line PL inside. From such a structure, increasing the diameter of the cross-section of the power line PL will further increase the diameter of the cross-section of the reel wire RL.

[0025] The lighting system according to the present embodiment controls the lighting device by wirelessly transmitting at least a control signal to the lighting device. By wirelessly transmitting the control signal to the lighting device, only the power line is included inside the reel wire of the lifting device. With such a configuration, the diameter of the cross-section of the reel wire can be reduced by at least the length corresponding to the length of the cross-section of the control line.

[0026] <First Embodiment> FIG. 1 shows the entirety of a lighting system 10 according to the first embodiment. The lighting system 10 includes lifting devices 1a and 1b (hereinafter referred to as lifting device 1), lighting devices 2a and 2b (hereinafter referred to as lighting device 2), a control device 3, and a power supply device 4. Note that the numbers of the lifting device 1 and the lighting device 2 shown in FIG. 1 are merely illustrative. There may be a plurality of combinations of the two lifting devices 1 and one lighting device 2 shown in FIG. 1. Also, the relationship between the lifting device 1 and the lighting device 2 may be one-to-one, N-to-one, or one-to-N (N is an arbitrary number of 2 or more).

[0027] The lifting device 1a has a reel wire 15a provided inside. Similarly, the lifting device 1b also has a reel wire 15b provided inside (hereinafter, the reel wire 15a and the reel wire 15b are referred to as the reel wire RL). The reel wire 15 extends downward from the lifting device 1. The lighting device 2 is attached to the tip of the reel wire 15. The lighting device 2 is suspended below the lifting device 1. It is preferably staged that the lifting device 1 suspended from the ceiling C is installed at a height where it is not visible or difficult to see from the viewer.

[0028] The lifting device 1 raises and lowers the lighting device 2 attached to the tip of the reel wire 15 by changing the length of the reel wire 15. The lifting device 1 is attached to the ceiling C with its longitudinal direction vertical. In this embodiment, an example where the lifting device 1 is attached to the ceiling will be described, but the lifting device 1 may be attached to a suspension baton instead of the ceiling. The suspension baton is a device having a lattice structure used in stage performances and the like, and its detailed description will be omitted.

[0029] The structure for winding the reel wire 15 of the lifting device 1 is the same as that of the lifting device EA described with reference to FIGS. 13 and 14, and thus its detailed description will be omitted.

[0030] The lighting device 2 is a device having one or more light emitting elements inside. In this embodiment, the light emitting element employs an LED (Light Emitting Device). The lighting device 2 has a connector at the upper part and is connected to the reel wire 15 via the connector.

[0031] The control device 3 controls the operations of the lifting device 1 and the lighting device 2. The lifting device 1 and the control device 3 are wirelessly connected. Also, the lighting device 2 and the control device 3 are wirelessly connected. The control device 3 is implemented by a CPU or an FPGA, etc. The control device 3 executes a control program stored in a memory (not shown). The operations of the lifting device 1 and the lighting device 2 are controlled according to the production data stored in a storage device (not shown) and / or in response to the operator's operations (the control device 3 includes a transmitter and an antenna not shown, and the transmitter transmits a control signal to the lifting device 1 and the lighting device 2 via the antenna). The production data is data that defines the operations of the lifting device 1 and the lighting device 2 according to a predetermined stage production.

[0032] The control signals from the control device 3 are wirelessly transmitted to the lifting device 1 and the lighting device 2 respectively. The control device 3 includes an input device and an output device not shown. The input device and the output device are used by the operator. The operator performs operations such as moving the lighting device 2 to a predetermined height (through the operation of the lifting device 1) and making the lighting device 2 emit light according to the stage production. The input device is an input device for inputting instructions for performing such operations. The output device is an output device for displaying the results of the operations of the lifting device 1 and the lighting device 2, etc.

[0033] The power supply device 4 is a power source that supplies power as the power source of the lifting device 1 and the lighting device 2. The power supply device 4 is connected to a power source provided on the ceiling C, etc. The lifting device 1 is connected to the power supply device 4 via a power cable. The power from the power supply device 4 is directly supplied to the lifting device 1. Also, the power from the power supply device 4 is supplied to the lighting device 2 through the reel wire 15 of the lifting device 1.

[0034] While the stage performance is in progress, the lighting device 2 descends to a position visible to the viewers and emits light. Therefore, connecting components such as cables to the lighting device 2 makes those components visible to the viewers, which is not preferable in terms of the performance. In the present embodiment, the lifting device 1 is provided at a position that is not visible to the viewers or is difficult to see from the viewers, and power is supplied from the lifting device 1 to the lighting device 2 through the reel wire 15, so there is no need to connect components such as the above-described cables to the lighting device 2.

[0035] Next, with reference to FIG. 2, the details of the lifting device 1 will be described. FIG. 2 shows the logical block of the lifting device 1. The lifting device 1 includes a control circuit 11, a transceiver 12, an antenna 13, and an electric motor 14.

[0036] The control circuit 11 controls the overall operation of the lifting device 1. The control circuit 11 is implemented by, for example, a CPU or an FPGA. In response to receiving a control signal from the control device 3, the control circuit 11 drives the electric motor 14. The control signal includes a signal for instructing the lifting device 1 to rotate a reel (not shown) at a predetermined speed, amount, direction, and / or timing. The control circuit 11 includes a detection circuit (not shown) such as a rotary encoder (not shown). The control circuit determines the vertical movement amount of the lighting device 2 by calculating the rotation amount of the rotation shaft of the electric motor 14. By controlling the lifting device 1 in this way, the lighting system 10 can move the lighting device 2 to a predetermined position in the vertical direction according to the stage performance.

[0037] The transceiver 12 is a circuit that executes various signal processes for wireless communication with the control device 3. The transceiver 12 includes a baseband processor and an RF circuit. The transceiver 12 transmits and receives control signals to and from a base station device or an access point described later via the antenna 13.

[0038] Next, with reference to FIG. 3, the details of the lighting device 2 will be described. FIG. 3 shows the logical block of the lighting device 2. The lighting device 2 includes a control circuit 21, a transceiver 22, and an antenna 23.

[0039] The control circuit 21 controls the overall operation of the lighting device 2. The control circuit 21 is implemented by, for example, an IC chip or the like. In response to receiving a control signal from the control device 3, the control circuit 21 controls the light emission of the light-emitting elements included in the lighting device 2, that is, the dimming and color adjustment of the light-emitting elements. The control signal is a signal for controlling the light emission of the lighting device 2, and in this embodiment, it is a DMX (Digital Multiplex) signal. The DMX signal is a signal compliant with a communication standard for controlling dimming and color adjustment of lighting fixtures.

[0040] The transceiver 22 is a circuit that executes various signal processes for wireless communication with the control device 3. The transceiver 22 includes a baseband processor and an RF circuit. The transceiver 22 transmits and receives control signals to and from a base station or an access point, which will be described later, via the antenna 23.

[0041] Next, referring to FIG. 4, a communication network CN1 for realizing the lighting system 10 will be described. The communication network CN1 includes one or more elevating devices 1, one or more lighting devices 2, one or more base stations 20, a control device 3, and a core network 30. The communication network CN is configured according to a predetermined technical specification (TS: Technical Specifications). For example, the communication network CN1 may conform to the technical specifications defined by 3GPP (for example, LTE, 5G, 6G, etc.).

[0042] When the communication network CN complies with 5G, the core network 30 includes a plurality of logical nodes such as an Access and Mobility Management Function (AMF) and a User Plane Function (UPF). The base station 20 is connected to the AMF in the C plane and to the UPF in the U plane. Also, when the communication network CN complies with LTE, the core network 30 includes a plurality of logical nodes such as a Mobility Management Entity (MME) and a Serving Gateway (S-GW). The base station 20 is connected to the MME in the C plane and to the S-GW in the U plane. The core network and the base station 20 are connected via, for example, an NG interface.

[0043] The base station 20 constitutes a gNB in 5G or an eNB in LTE. By connecting a plurality of base stations 20 to each other, a Radio Access Network (RAN) is formed. The plurality of base stations 20 are connected via, for example, an Xn interface.

[0044] The lifting device 1, the lighting device 2, and the control device 3 each constitute a User Equipment (UE). The lifting device 1, the lighting device 2, and the control device 3 are connected to the base station 20 via, for example, a Uu interface.

[0045] The lifting device 1 wirelessly receives from the control device 3 via the base station 20 a control signal for raising and lowering the lifting device 1 (driving the motor) at a predetermined timing and a predetermined distance according to a predetermined stage performance. This control signal is converted into an Ethernet signal and transmitted from the control device 3. That is, the control signal is converted into a form for wireless transmission. The transmission from the control device 3 to the base station 20 is called uplink transmission, and the transmission from the base station 20 to the lifting device 1 is called downlink communication.

[0046] The lighting device 2 wirelessly receives, via the base station 20, a control signal (DMX signal) for dimming and color - adjusting the light - emitting elements at a predetermined timing and for a predetermined time duration according to a predetermined stage performance. This control signal is converted into an Ethernet signal and transmitted from the control device 3. The transmission from the control device 3 to the base station 20 is referred to as uplink transmission, and the transmission from the base station 20 to the lifting device 1 is referred to as downlink communication.

[0047] The downlink communication from the base station 20 to the lifting device 1 and the lighting device 2 adopts a multiplexing method such as orthogonal frequency - division multiplexing (OFDM). In the multiplexing method, multiplexed transmission is performed in terms of any of frequency, time, and / or signal sequence. By multiplexed transmission, interference of signals between a plurality of lifting devices 1 and / or between a plurality of lighting devices 2 can be prevented.

[0048] Also, in downlink communication, the base station 20 schedules downlink transmission to a plurality of lifting devices 1 and / or a plurality of lighting devices 2. The scheduling is executed by the base station 20 transmitting downlink control information (DCI) to the lifting device 1 / lighting device 2 using a physical downlink control channel (PDCCH). The DCI includes information regarding downlink resource allocation for the lifting device 1 / lighting device 2.

[0049] In wireless transmission, for example, network slicing allocated for stage performances may be used. Network slicing is a technology for logically dividing a network, and each divided network slice is identified by S-NSSAI (Single-Network Slice Selection Assistance Information). For example, specific values may be assigned to SST (Slice and Service Type) and SD (Slice Differentiator) as the network slice for this embodiment (for example, stage performance).

[0050] For example, when a network slice for stage performance is allocated, the control device 3 as a UE notifies the corresponding S-NSSAI to the AMF, the AMF selects the SMF (Session Management Function) based on the S-NSSAI, and the SMF selects the UPF. Through such procedures, the UPF forms the corresponding network slice within the core network.

[0051] In this embodiment, the lifting device 1 communicates wirelessly with the control device 3, but the lifting device 1 may also communicate with the control device 3 by wire. The lifting device 1 raises and lowers the lighting device 2 according to the control signal transmitted by wire from the control device 3.

[0052] Next, referring to FIG. 5, a cross-section of the reel wire 15 included in the lifting device 1 is shown. As shown in FIG. 5, the reel wire 15 has a power line 15p for supplying power to the lighting device 2 inserted therein. On the other hand, different from the reel wire RL according to the prior art shown in FIG. 15, it does not have a control line CL for transmitting a control signal to the lighting device 2 installed inside.

[0053] Since at least the lighting device 2 wirelessly receives a control signal from the control device 3 in the lighting system 10, the reel line 15 does not need to house a control line. Since the reel line 15 does not house a control line, the diameter of the cross-section of the reel line 15 can be shortened by the length corresponding to the diameter of the cross-section of the control line CL as compared with the reel line RL according to the prior art. Instead, in order to supply more power to the lighting device 2, the diameter of the cross-section of the power line 15p can be increased by the length corresponding to the diameter of the cross-section of the control line CL.

[0054] Next, referring to the flowchart shown in FIG. 6, the operation in the stage production executed by the lighting system 10 will be described. In an actual stage production, for example, the lighting device 2 repeatedly receives a control signal from the control device 3, but in the flowchart shown in FIG. 6, such repeated operations are not considered.

[0055] In step S601, the control device 3 generates a control signal for raising and lowering the lighting device 2 according to predefined production data or in response to an operator's operation, converts it into a format (Ethernet signal) for wireless transmission, and transmits it to the lifting device 1 via the base station 20. Note that the transmission of the control signal in step S601 may be a wired transmission.

[0056] In step S602, when the transceiver 12 of the lifting device 1 receives a control signal via the base station 20, the control circuit 11 drives the electric motor 14 according to the control signal to raise and lower the lighting device 2. The control circuit 11 controls the amount of movement in the vertical direction of the lighting device 2 by calculating the amount of rotation of the rotating shaft of the electric motor 14 using a detection circuit such as a rotary encoder.

[0057] In step S603, the control device 3 generates a control signal (DMX signal) for controlling the dimming and color adjustment of the light-emitting element according to predefined production data or in response to an operator's operation, converts it into an Ethernet signal, and transmits it to the base station 20.

[0058] In step S604, when the transceiver 22 of the lighting device 2 receives a control signal via the base station 20, the control circuit 21 controls the dimming and color adjustment of the light-emitting element according to the control signal.

[0059] As described above, the lighting system according to the first embodiment has been described. According to the first embodiment, the diameter of the cross-section of the reel wire can be shortened, and the size of the lifting device can be reduced. Further, according to the first embodiment, the diameter of the cross-section of the power line can be increased without increasing the diameter of the cross-section of the reel wire, and more power can be supplied to the lighting device.

[0060] <Second Embodiment> Next, a second embodiment will be described. Since the overall configuration of the lighting system 10 according to the second embodiment is the same as the configuration shown in FIG. 1, a detailed description will be omitted. FIG. 7 illustrates a communication network CN2 that realizes the lighting system 10 according to the second embodiment.

[0061] The communication network CN2 is different from the communication network CN1 in that direct communication is executed between a plurality of lifting devices 1, between a plurality of lighting devices 2, and / or between some or all of the lifting devices 1 and some or all of the lighting devices 2. These direct communications may be implemented, for example, by device-to-device (D2D) communication using a side link defined by 5G. A side link is a communication path for direct communication between UEs, and direct communication between UEs is executed. In side link communication, a physical side link broadcast channel (PSBCH), a physical side link shared channel (PSBCH), and a physical side link control channel (PSBCH) are used via a PC5 interface. In this case, communication is executed between a plurality of lifting devices 1, between a plurality of lighting devices 2, and / or between some or all of the lifting devices 1 and some or all of the lighting devices 2.

[0062] In the second embodiment, a predetermined lifting device 1 among the plurality of lifting devices 1 communicates with the control device 3 via the base station 20, and the predetermined lifting device 1 executes D2D communication with the other lifting devices 1. Further, the predetermined lifting device 1 may execute D2D communication with some or all of the lighting devices 2.

[0063] Also, in the second embodiment, a predetermined lighting device 2 among the plurality of lighting devices 2 communicates with the control device 3 via the base station 20, and the predetermined lighting device 2 executes D2D communication with the other lighting devices 2.

[0064] The plurality of lifting devices 1 are often within a radius of 1 meter. Similarly, the plurality of lighting devices 2 are often within a radius of 1 meter. Also, both the lifting device 1 and the lighting device 2 are often within a radius of 1 meter. Therefore, in the second embodiment, some of the lifting devices 1 and / or lighting devices 2 communicate wirelessly with the base station 20, and the some of the lifting devices 1 and / or lighting devices 2 communicate directly with the other lifting devices 1 and / or lighting devices 2.

[0065] When the direct communication is executed using the sidelink, the lifting device 1 and / or lighting device 2 that communicate via the control device 3 and the base station 20 functions as a U2N Relay UE (UE-to-Network Relay UE). The other lifting devices 1 and / or lighting devices 2 function as Remote UEs. The lifting device 1 and / or lighting device 2 as the U2N Relay UE receives a control signal from the control device 3 via the base station 20 and transmits the control signal to the lifting device 1 and / or lighting device 2 as the Remote UE.

[0066] The lifting device 1 and / or the lighting device 2 that function as the U2N Relay UE may be predefined or selected by the operator's operation. The lifting device 1 and / or the lighting device 2 designated as the U2N Relay UE receives a signal from the control device 3 instructing it to function as the U2N Relay UE and transmit a control signal to the Remote UE.

[0067] The communication network CN2 shown in FIG. 7 uses the sidelink defined in 5G for the lifting device 1 and the lighting device 2 to perform D2D communication. Instead of such a configuration, the wireless communication between the above-described lifting device 1 and / or lighting device 2 may be performed according to the IEEE802.11 standard. FIG. 8 shows the configuration of the communication network CN3 when the wireless communication is performed according to the IEEE802.11 standard.

[0068] In the IEEE802.11 standard, an access point (AP) and a station (STA) are defined. The AP performs wireless communication with the STAs within its radio wave reach. In this embodiment, a predetermined lifting device 1 that performs wireless communication with the control device 3 via the base station 20 according to a technical specification such as 5G or LTE performs wireless communication with other lifting devices 1 according to the IEEE802.11 standard. In this case, the predetermined lifting device 1 functions as the AP, and the other lifting devices 1 function as the STAs.

[0069] Also, a predetermined lighting device 2 that performs wireless communication with the control device 3 via the base station 20 according to a technical specification such as 5G or LTE may perform wireless communication with other lighting devices 2 according to the IEEE802.11 standard. In this case, the predetermined lighting device 2 functions as the AP, and the other lighting devices 2 function as the STAs. The AP and the STAs perform wireless communication by executing procedures such as a polling procedure, an authentication procedure, and an association procedure according to the IEEE802.11 standard.

[0070] Furthermore, a predetermined lifting device 1 that wirelessly communicates with the control device 3 via the base station 20 in accordance with technical specifications such as 5G or LTE may wirelessly communicate with other lifting devices 1 and some or all of the lighting devices 2 in accordance with the IEEE802.11 standard. In this case, the predetermined lifting device 1 functions as an AP, and the other lifting devices 1 and / or lighting devices 2 function as STAs. FIG. 8 shows such a configuration.

[0071] The lifting device 1 and / or lighting device 2 that functions as an AP may be predefined or selected by an operator's operation. Also, in accordance with the IEEE802.11 standard, it may be determined which of the lifting devices 1 and / or lighting devices 2 functions as an AP by a polling procedure.

[0072] Next, with reference to the flowchart shown in FIG. 9, the operation in the stage performance executed by the lighting system 10 according to the second embodiment will be described. In the flowchart shown in FIG. 9, one of the 100 lifting devices 1 (lifting device 1A) communicates with the control device 3 via the base station 20. The other 99 lifting devices 1 (collectively referred to as lifting device 1B) execute D2D communication with lifting device 1A using sidelink. Alternatively, lifting device 1A may function as an AP and lifting device 1B may function as an STA to perform wireless communication in accordance with the IEEE802.11 standard. Note that the communication between the lifting device 1 and the control device 3 may be wired communication.

[0073] Also, in the flowchart shown in FIG. 9, one of the 100 lighting devices 2 (lighting device 2A) communicates with the control device 3 via the base station 20. The other 99 lighting devices 2 (collectively referred to as lighting device 2B) execute D2D communication with lighting device 2A using sidelink. Alternatively, lighting device 2A may function as an AP and lighting device 2B may function as an STA to perform wireless communication in accordance with the IEEE802.11 standard.

[0074] In step S901, the control device 3 generates a control signal for raising and lowering the lighting device 2 according to pre-defined rendering data or in response to an operator's operation, converts it into an Ethernet signal, and transmits it to the lifting device 1A via the base station 20.

[0075] In step S902, when the transceiver 12 of the lifting device 1A receives the control signal received from the control device 3, it transmits it to the lifting device 1B. The transmission of this control signal is executed as described above.

[0076] In step S903, the control circuit 11 of the lifting device 1A drives the electric motor 14 according to the control signal to raise and lower the lighting device 2. The control circuit 11 controls the vertical movement amount of the lighting device 2 by calculating the rotation amount of the rotating shaft of the electric motor 14 using a detection circuit such as a rotary encoder. The lifting device 1B performs the same operation.

[0077] In step S904, the control device 3 generates a control signal (DMX signal) for controlling the dimming and color adjustment of the light-emitting elements according to pre-defined rendering data or in response to an operator's operation, converts it into an Ethernet signal, and transmits it to the base station 20.

[0078] In step S905, when the transceiver 22 of the lighting device 2A receives the control signal received from the control device 3, it transmits it to the lighting device 2B. The transmission of this control signal is executed as described above.

[0079] In step S906, the control circuit 21 of the lighting device 2A controls the dimming and color adjustment of the light-emitting elements according to the control signal. The lighting device 2B performs the same operation.

[0080] As described above, the lighting system according to the second embodiment has been described. According to the second embodiment, the effects achieved by the first embodiment can be achieved, and since some wireless communication is directly executed between the lifting device and / or the lighting device, the communication efficiency can be improved.

[0081] <Third Embodiment> Next, the third embodiment will be described. In the third embodiment, a plurality of lighting devices 2 are embedded in the reel wire 15 of one lifting device 1. FIG. 10 shows an enlarged view of the reel wire 15. As shown in FIG. 10, a plurality of lighting devices 2 (lighting devices 2a to 2d in FIG. 10) are arranged at predetermined intervals on the reel wire 15. The lighting device 2 is mounted by an IC chip having a small light-emitting element or the like.

[0082] In the third embodiment, since more lighting devices 2 are arranged for one lifting device 1 (reel wire 15), it is necessary to supply more power. Further, an amplifier for amplifying power may be provided inside the reel wire.

[0083] Also in the third embodiment, a control signal from the control device 3 may be wirelessly transmitted to the lighting device 2, but in the configuration according to the third embodiment, the lighting device 2 and the control device 3 may communicate wired. In this case, according to the prior art, a control signal is transmitted to each of the lighting devices 2 via the reel wire 15. The reel wire has the configuration shown in FIG. 15.

[0084] According to the third embodiment, since more lighting devices 2 are used for one lifting device 1, the stage performance becomes more magnificent. On the other hand, the reel wire 15 is wound around the reel wire winding surface and unwound from the reel wire winding surface when the lifting device drives the electric motor 14. As shown in FIG. 1, since the lifting device 1 covers the inside (reel) with a cover, the lighting device 2 arranged on the reel wire 15 cannot be visually recognized from the outside when the reel wire 15 is wound around the reel wire winding surface.

[0085] Since the lighting device 2 cannot be visually recognized from the outside when it is inside the cover of the lifting device 1, emitting light in this state is not preferable from the viewpoint of power consumption. In the third embodiment, in consideration of this, the light emission of each of the lighting devices 2 is controlled.

[0086] For example, when the reel wire 15 is unwound from the reel wire winding surface and descends, each of the plurality of lighting devices 2 arranged on the reel wire 15 may be controlled by the control device 3 to emit light when it is positioned below the cover of the lifting device 1 and can be visually recognized from the outside. FIG. 11 shows a state in which each of the plurality of lighting devices 2 emits light when the reel wire 15 descends.

[0087] As shown in FIG. 11, when the reel wire 15 descends, each of the plurality of lighting devices 2 arranged on the reel wire 15 is positioned below the cover 16 of the lifting device 1 in order from the lighting device 2 arranged below, and is in a state where it can be visually recognized from the outside. In FIG. 11, the lighting devices 2c and 2d shown by solid lines are positioned below the cover 16 and are in a state where they can be visually recognized from the outside. On the other hand, the lighting devices 2a and 2b shown by wavy lines are positioned above the cover 16 and are in a state where they cannot be visually recognized from the outside.

[0088] The control device 3 may transmit a control signal to the lighting device 2 so that each of the lighting devices 2 that descends as the reel wire 15 descends emits light at a predetermined timing when it is positioned below the cover 16. As shown in FIG. 11, the lighting devices 2c and 2d turn on their light emission in response to the control signal from the control device 3 at the timing when they become visible from the outside. Since the lighting devices 2a and 2b are not in a state where they can be visually recognized from the outside, their light emission remains off. That is, the control device 3 controls the light emitting element to emit light according to the positional relationship between the lighting device 2 and the lifting device 1 (cover 16).

[0089] The vertical position of the lighting device 2 can be recognized by the control device 3 by the control device 3 measuring time, or by the lifting device 1 detecting the position of the lighting device 2 using a rotary encoder or the like and notifying the control device 3 of the position.

[0090] The above is an example in which each of the plurality of lighting devices 2 is controlled to emit light one by one at a timing when it is located below the cover 16, but the present invention is not limited to such an example. For example, all or a predetermined number of the plurality of lighting devices 2 may be controlled to emit light simultaneously at a timing when all or the predetermined number of the lighting devices 2 are located below the cover 16.

[0091] As described above, the lighting system according to the third embodiment has been described. According to the third embodiment, since more lighting devices are used, the effect can be made more magnificent. Also, as described above, since the light emission of each of the plurality of lighting devices is controlled, the power consumed by the light emitting devices can be saved.

Explanation of Reference Numerals

[0092] 1 Lifting device 2 Lighting device 3 Control device 4 Power supply device 10 Lighting system

Claims

1. A lighting system comprising a lifting device, a lighting device, and a control device, wherein the lifting device includes a reel wire extending downward and is configured to change the length of the reel wire, and the reel wire includes a power line for supplying power to the lighting device, the lighting device is connected to the reel wire, is configured to move up and down as the length of the reel wire changes, and is configured to cause a light-emitting element to emit light in response to a control signal from the control device, the control device is configured to generate a control signal for controlling the light emission and convert the control signal into a format for wireless transmission, the lighting device is further configured to wirelessly receive the converted control signal from the control device via a base station, A lighting system.

2. The lighting system according to claim 1, wherein the control signal is multiplexed and transmitted by any one of frequency, time, and / or signal sequence.

3. The lighting system according to claim 1, wherein the control device is further configured to wirelessly transmit the converted control signal using a specified network slice.

4. The lighting device includes a first lighting device and a second lighting device, the first lighting device is configured to wirelessly receive the control signal from the control device via the base station and wirelessly transmit the received control signal to the second lighting device, the second lighting device is configured to wirelessly receive the control signal directly from the first lighting device, The lighting system according to claim 1.

5. The lighting system according to claim 4, wherein the control device is further configured to generate a signal instructing the first lighting device to transmit the control signal to the second lighting device and transmit the signal to the first lighting device.

6. The lighting system according to claim 1, wherein the lighting device is disposed on the reel wire.

7. The lighting system according to claim 6, wherein the control signal indicates that the light emission is controlled according to the positional relationship between the lighting device and the lifting device.

8. The lighting system according to claim 7, wherein the control signal indicates that the light-emitting element emits light in response to the lighting device becoming visible when the lighting device descends as the length of the reel wire changes.

9. A method executed by a lighting system, A step of changing the length of the reel line by a lifting device including a reel line extending downward, wherein the reel line includes a power line for supplying power to a lighting device. A step of causing the lighting device connected to the reel line to move up and down as the length of the reel line changes, and causing a light emitting element to emit light in response to a control signal from a control device. A step of generating a control signal for controlling the light emission by the control device and converting the control signal into a format for wireless transmission. A step of wirelessly receiving, by the lighting device, the converted control signal from the control device via a base station. A method including the above steps.

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