Lighting device and lighting control method

Abstract

To provide a lighting device capable of performing control to change the lighting time when detecting a robot and when detecting a person.SOLUTION: The lighting device includes: a reception unit 15 that receives signals from a moving body 20; a person detection sensor 13 that detects the existence of a human body 30; and a control unit 12 that controls a light source 14 to change the light emission mode of depending on whether the reception unit 15 has received a signal, and whether the person detection sensor 13 has detected the presence of a human body 30.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a lighting device and a lighting control method.

Background Art

[0002] In a space such as a warehouse where a picking robot coexists with people, it is necessary to detect people or the picking robot and control the lighting. Patent Document 1 discloses a lighting fixture that, when the extinguishing time when a person is absent is short, regards that time as the occupancy time of the person, and when the ratio of the total occupancy period to the total absence time is high, lengthens the lighting holding time, and when the ratio is low, shortens the lighting holding time. Further, Patent Document 2 discloses a position information management system that mounts a function of emitting infrared rays by a heater or the like on a robot and detects the robot with a heat ray sensor for detecting people.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technology disclosed in Patent Document 1, the presence or absence of a person is detected, but the technology for detecting a robot is not disclosed. Further, in the technology disclosed in Patent Document 2, there is a problem that the power consumption of the heater mounted on the robot is wasted.

[0005] Therefore, the present disclosure provides a lighting device that performs control to change the light emission mode when a robot is detected and when a person is detected.

Means for Solving the Problems

[0006] The lighting device according to one aspect of the present disclosure includes a receiving unit that receives a signal from a moving body, a human detection sensor that detects the presence of a human body, and a control unit that changes the light emission mode of a light source according to whether the receiving unit has received the signal and whether the human detection sensor has detected the presence of the human body.

[0007] The lighting control method according to one aspect of the present disclosure includes a receiving step of receiving a signal from a moving body, a human detection step of detecting the presence of a human body, and a control step of controlling a light source to change the light emission mode of the light source according to whether the signal has been received in the receiving step or whether the presence of the human body has been detected in the human detection step.

[0008] These general or specific aspects may be implemented by an apparatus, a method, an integrated circuit, a computer program, or a recording medium such as a computer-readable CD-ROM, or may be implemented by any combination of an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

Effect of the Invention

[0009] The lighting device and the like according to one aspect of the present disclosure can perform control to change the light emission mode when a robot is detected and when a human is detected.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

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Figure 8

Figure 9

Figure 10

[0011] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0012] Note that each of the embodiments described below shows comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, order of steps, etc. shown in the following embodiments are merely examples and are not intended to limit the scope of the claims. In addition, among the components according to the following embodiments, components not described in the independent claims indicating the most general concept are described as optional components. Also, each figure is not necessarily drawn precisely. In each figure, substantially the same configuration is denoted by the same reference numeral, and overlapping descriptions are omitted or simplified.

[0013] Note that each figure is a schematic diagram and is not necessarily drawn precisely. Also, in each figure, substantially the same configuration may be denoted by the same reference numeral, and overlapping descriptions may be omitted or simplified.

[0014] (Embodiment 1) [Overview of Lighting Device] First, the outline of the lighting device in Embodiment 1 will be described. FIG. 1 is a block diagram of the lighting device in Embodiment 1. The lighting device 10 includes a lighting circuit unit 11, a control unit 12, a human detection sensor 13, a light source 14, and a receiving unit 15. The lighting device 10 is usually provided in plural in a space where a moving body 20 and a person coexist, such as a warehouse or a factory.

[0015] The lighting circuit unit 11 causes the light source 14 to emit light under the control from the control unit 12. Specifically, the lighting circuit unit 11 applies a voltage to a light-emitting element. The lighting circuit unit 11 is realized by, for example, an AC-DC converter circuit or a DC-DC converter circuit.

[0016] The control unit 12 controls the lighting circuit unit 11 based on the output from the human detection sensor 13 or the signal received by the receiving unit 15. The control unit 12 is realized by a processor and a memory. Alternatively, the control unit 12 may be realized by a dedicated microcomputer or the like. The control unit 12 starts or resets a lighting hold timer included in the lighting circuit unit 11, or controls the lighting circuit unit 11 to perform operations such as adjusting the dimming level of the lighting device 10 or selecting the light source 14, based on the signal transmitted from the human detection sensor 13 or the signal received by the receiving unit 15.

[0017] Further, when the control unit 12 receives a signal from the human detection sensor 13, it determines that the human body 30 has been detected. At this time, when the control unit 12 receives a signal indicating that the human body 30 has been continuously detected a plurality of times from the human detection sensor 13, it may make a determination that the human body 30 has been detected.

[0018] The human detection sensor 13 detects a human body 30 existing at a predetermined distance from the lighting device 10. The human detection sensor 13 is realized by a heat ray sensor such as a pyroelectric infrared ray sensor (PIR (Passive Infrared Ray) sensor). The heat ray sensor detects the difference between the input values before and after the change when the amount of heat rays incident on the heat ray sensor changes. Alternatively, the human detection sensor 13 may be a radio wave sensor. The radio wave sensor is a so-called Doppler sensor, which detects the change in the frequency of the transmitted wave and the received wave reflected by the moving object. Alternatively, the human detection sensor 13 may be an image sensor. The image sensor detects the human body 30 by detecting the temporal difference in the images.

[0019] The human detection sensor 13 detects a human body 30 existing within a predetermined distance, for example, within the range illuminated by the lighting device 10, and transmits a signal indicating to the control unit 12 that the human body 30 has been detected.

[0020] That is, the human detection sensor 13 acquires human body information by detecting the human body 30 existing at a predetermined distance. The human detection sensor 13 transmits the acquired human body information to the control unit 12. Alternatively, the human detection sensor 13 may transmit a signal indicating that the human body information has been acquired to the control unit 12.

[0021] The light source 14 emits light under the control from the lighting circuit unit 11. The light source 14 is, for example, an LED (Light Emitting Diode) or an organic EL (Electro Luminescence). Alternatively, the light source 14 may be a discharge lamp light source such as a fluorescent lamp or an incandescent lamp.

[0022] The light source 14 includes a white point light source and a red point light source, and may be switched when each of the moving body 20 and the human body 30 is detected. Specifically, when the light source 14 is an RGB-LED light source, the light source 14 may turn on the R-LED, G-LED, and B-LED simultaneously when the human body 30 is detected, and may turn on only the R-LED when the moving body 20 is detected. Alternatively, the light source 14 includes a visible light source and a near-infrared light source, and may be switched when each of the moving body 20 and the human body 30 is detected.

[0023] The receiving unit 15 receives the signal transmitted from the mobile body 20. The receiving unit 15 is realized by an infrared light receiver. When the receiving unit 15 receives a signal from the mobile body 20, it transmits the received signal to the control unit 12. Or when the receiving unit 15 receives a signal from the mobile body 20, it may transmit a signal to notify the control unit 12 that it has received the signal.

[0024] That is, when the signal assumed to be received by the receiving unit 15 is an infrared remote control signal, the receiving unit 15 is realized by an infrared remote control light receiving module, and converts the received signal into a digital signal that can be processed by the control unit 12. Or when the signal assumed to be received by the receiving unit 15 is a radio wave signal, the receiving unit 15 is realized by a wireless signal receiving unit including an antenna. At this time, the control unit 12 only receives the signal indicating the address assigned to the lighting device 10, and ignores signals other than the signal indicating the address assigned to the lighting device 10. Note that the remote control signal receiving unit when the user manually sets the dimming level or lighting holding time when the lighting device 10 is lit, etc., and the receiving unit 15 may be shared.

[0025] The mobile body 20 is a mobile robot such as a picking robot used in a warehouse or the like. The mobile body 20 includes a signal transmission unit 21. Also, the mobile body 20 includes a motor and a position detection unit, and moves by driving the motor based on the position information detected by the position detection unit. Further, the mobile body 20 transmits a signal notifying the presence of the mobile body 20 to the lighting device 10 from the signal transmission unit 21. The mobile body 20 may transmit a signal toward the ceiling in the moving direction at a certain period. The area or time zone in which the signal transmission unit 21 of the mobile body 20 transmits a signal may be limited.

[0026] The mobile body 20 may obtain the position information of the location where the wireless tag 40 exists from, for example, a wireless tag 40 embedded in the floor, and collate the map information stored in the memory of the mobile body 20 with the obtained position information, and then move. Alternatively, the mobile body 20 may be equipped with an active sensor such as a LiDAR (Light Detection and Ranging) that uses an image sensor, a laser, an infrared sensor, etc., and automatically move inside a warehouse or a factory based on information about surrounding objects using the LiDAR. The wireless tag 40 will be described later.

[0027] The signal transmission unit 21 transmits a signal toward the lighting device 10. The signal transmitted by the signal transmission unit 21 is, for example, an infrared signal with a central wavelength of 900 nm or more and 950 nm or less. The signal transmission unit 21 transmits a signal toward the lighting device 10 existing at the moving destination of the mobile body 20 at a constant period. Note that the signal transmitted by the signal transmission unit 21 is not limited to the above infrared signal. The signal transmitted by the signal transmission unit 21 may be a radio wave signal including the address information of the lighting device 10 associated with the position information of the location where the mobile body 20 exists.

[0028] [Overview of the operation of the lighting device] Next, an overview of the operation of the lighting device 10 will be described. Since the mobile body 20 moves autonomously in a space such as a warehouse where people and the mobile body 20 coexist, in order to obtain the illuminance required for the image sensor of the mobile body 20, or in order to obtain the illuminance required for a person to visually recognize the moving mobile body 20, the lighting device 10 needs to be appropriately controlled.

[0029] FIG. 2 is a diagram showing an overview of the lighting device, the moving body, and the person in Embodiment 1. When the control unit 12 of the lighting device 10 receives a signal indicating that the human body 30 has been detected from the human detection sensor 13, it triggers the lighting hold timer included in the lighting circuit unit 11, and the lighting hold timer counts for a certain period of time after being triggered. While the lighting hold timer is counting, the control unit 12 causes the lighting circuit unit 11 to turn on the light source 14 brightly, so that even when the human body 30 is in a stationary state, the light source 14 is maintained in the lit state for a certain period of time. Here, bright lighting means emitting light at 100% lighting, which is the rated lighting of the lighting fixture. Note that, in contrast to bright lighting, dim lighting is, for example, 20% dimming lighting.

[0030] While the lighting hold timer is counting, if the control unit 12 receives a signal indicating that the human body 30 has been detected again from the human detection sensor 13, it resets the count of the lighting hold timer, extends the count of the lighting hold timer, and extends the time for the lighting circuit unit 11 to turn on the light source 14 brightly. Then, when the count of the lighting hold timer ends, the control unit 12 causes the lighting circuit unit 11 to turn on the light source 14 dimly. At this time, the control unit 12 may turn off the light source 14 in the lighting circuit unit 11. Note that the control unit 12 may cause the lighting circuit unit 11 to perform the operation of turning on the light source 14 dimly or turning it off in a fade-out operation. Here, dim lighting means emitting light from the light source 14 dimmer than in the normal state.

[0031] When the control unit 12 receives a signal indicating that it has received a signal from the moving body 20 from the receiving unit 15, it triggers the lighting hold timer included in the lighting circuit unit 11, and the lighting hold timer counts for a certain period of time after being triggered. While the lighting hold timer is counting, the control unit 12 causes the lighting circuit unit 11 to turn on the light source 14 brightly. The count time of the lighting hold timer when the receiving unit 15 receives a signal from the moving body 20 is shorter than the count time of the lighting hold timer when the control unit 12 receives a signal indicating that the human body 30 has been detected from the human detection sensor 13.

[0032] FIG. 3 is a flowchart showing the operation of the lighting device when a person is detected in Embodiment 1.

[0033] First, the control unit 12 determines whether the human detection sensor 13 has detected the human body 30 (step S100). The human detection sensor 13 is, for example, an infrared sensor, and when detecting a change in the amount of heat generated by the movement of the human body 30, it transmits a signal indicating that the human body 30 has been detected to the control unit 12.

[0034] When the control unit 12 determines that the human detection sensor 13 has detected the human body 30 (Yes in step S100), the control unit 12 turns on the light source 14 for a certain period of time (step S101). That is, the control unit 12 causes the light source 14 to turn on for a certain period of time in the lighting circuit unit 11. Specifically, the control unit 12 causes the light source 14 in the lighting circuit unit 11 to turn on for the time determined to cause the light source 14 to emit light when the human body 30 is detected. Here, causing the control unit 12 to emit light from the light source 14 may mean that the control unit 12 causes the light source 14 to emit light brighter than in the normal state.

[0035] When the control unit 12 determines that the human detection sensor 13 has not detected the human body 30 (No in step S100), the control unit 12 turns off the light source 14 (step S102). That is, the control unit 12 does not cause the light source 14 to emit light in the lighting circuit unit 11. For example, not causing the lighting circuit unit 11 to emit light from the light source 14 may mean, for example, setting the light source 14 to a dimming rate of 50%, but it may also mean turning off the light source 14.

[0036] Figure 4 is a flowchart showing the operation of the lighting device when detecting a moving object in Embodiment 1.

[0037] First, the control unit 12 determines whether the receiving unit 15 has detected the moving object 20 (step S200). The receiving unit 15 is, for example, an infrared sensor, and when receiving a signal transmitted by the moving object 20, it transmits a signal indicating that the moving object 20 has been detected to the control unit 12.

[0038] When the control unit 12 determines that the receiving unit 15 has detected the moving body 20 (Yes in step S200), the control unit 12 turns on the light source 14 for a certain period of time (step S201). That is, the control unit 12 causes the lighting circuit unit 11 to emit light from the light source 14 for a certain period of time. Specifically, the control unit 12 causes the lighting circuit unit 11 to turn on the light source 14 for the time determined to cause the light source 14 to emit light when the moving body 20 is detected. Here, causing the control unit 12 to emit light from the light source 14 may mean that the control unit 12 causes the light source 14 to emit light brighter than in the normal state.

[0039] When the control unit 12 determines that the receiving unit 15 has not detected the moving body 20 (No in step S200), the control unit 12 turns off the light source 14 (step S202). That is, the control unit 12 causes the lighting circuit unit 11 to turn off the light source 14. For example, when the lighting circuit unit 11 does not emit light from the light source 14, it may mean, for example, setting the light source 14 to a dimming rate of 50%, but it may also mean turning off the light source 14.

[0040] Next, the time for which the lighting device 10 in the embodiment turns on the light source 14 will be described in detail. FIG. 5 is a time chart showing the lighting time of the lighting device 10 in the first embodiment. When the lighting device 10 detects the human body 30, it emits light for a time T1. While the lighting device 10 detects the human body 30 and emits light for the time T1, if the lighting device 10 detects the human body 30 again, the control unit 12 resets the lighting hold timer and causes the lighting circuit unit 11 to emit light from the light source 14 for the time T1 again.

[0041] Similarly, when the lighting device 10 detects the moving body 20, it emits light for a time T2. The time T2 is shorter than the time T1. While the lighting device 10 detects the moving body 20 and emits light for the time T2, if the lighting device 10 detects the moving body 20 again, the control unit 12 resets the lighting hold timer and causes the lighting circuit unit 11 to emit light from the light source 14 for the time T2 again. Here, causing the control unit 12 to emit light from the light source 14 may mean that the control unit 12 causes the light source 14 to emit light brighter than in the normal state.

[0042] FIG. 6 is another time chart showing the lighting time of the lighting device in Embodiment 1. As described with reference to FIG. 5, when the lighting device 10 detects the human body 30, it emits light for a time period T1. While the lighting device 10 detects the human body 30 and emits light for the time period T1, if the lighting device 10 detects the moving body 20, the control unit 12 resets the lighting hold timer and causes the lighting circuit unit 11 to emit light from the light source 14 again for the time period T1. That is, while the lighting device 10 detects the human body 30 and emits light for the time period T1, if the lighting device 10 detects the moving body 20, the control unit 12 does not cause the lighting circuit unit 11 to emit light from the light source 14 for the time period T2, but causes the light source 14 to emit light again for the time period T1. Here, causing the control unit 12 to emit light from the light source 14 may mean that the control unit 12 causes the light source 14 to emit light brighter than in the normal state.

[0043] Also, as described with reference to FIG. 5, when the lighting device 10 detects the moving body 20, it emits light for a time period T2. The time period T2 is shorter than the time period T1. While the lighting device 10 detects the moving body 20 and emits light for the time period T2, if the lighting device 10 detects the human body 30, the control unit 12 resets the lighting hold timer and causes the lighting circuit unit 11 to emit light from the light source 14 for the time period T1. Here, causing the control unit 12 to emit light from the light source 14 may mean that the control unit 12 causes the light source 14 to emit light brighter than in the normal state.

[0044] When the count of the lighting hold timer ends, the control unit 12 causes the lighting circuit unit 11 to dim the light source 14 and return to the dim lighting state. For example, dimming the light may mean, for example, setting the light source 14 to a dimming rate of 50%, but the light source 14 may also be turned off. At this time, while the light source 14 is transitioning to the dim lighting state by a fade-out operation under the control of the lighting circuit unit 11, it is regarded as being in the bright lighting state.

[0045] (Embodiment 2) [Overview of Lighting Device] Next, the lighting device in Embodiment 2 will be described. FIG. 7 is a block diagram of the lighting device 10a in Embodiment 2. The lighting device 10a includes a lighting circuit unit 11, a control unit 12, a human detection sensor 13, an R-LED light source 14-1, a G-LED light source 14-2, a B-LED light source 14-3, and a receiving unit 15. Here, the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 may be collectively referred to as the light source 14. Note that descriptions of the configurations common to the lighting device 10 and the lighting device 10a are omitted. The moving body 20a includes a signal transmission unit 21, a camera 22, and a tag reader 23. Note that descriptions of the configurations common to the moving body 20 and the moving body 20a are omitted.

[0046] The R-LED light source 14-1 is a red LED light source. The R-LED light source 14-1 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. In the R-LED light source 14-1, aluminum, gallium, or arsenic may be used for the LED chip. Further, the R-LED light source 14-1 irradiates light having a wavelength of around 660 nm.

[0047] The G-LED light source 14-2 is a green LED light source. The G-LED light source 14-2 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. In the G-LED light source 14-2, aluminum or arsenic may be used for the LED chip. Further, the G-LED light source 14-2 irradiates light having a wavelength of around 520 nm.

[0048] The B-LED light source 14-3 is a blue LED light source. The B-LED light source 14-3 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. In the B-LED light source 14-3, aluminum or phosphorus may be used for the LED chip. Further, the B-LED light source 14-3 irradiates light having a wavelength of around 450 nm.

[0049] The camera 22 is provided on the moving body 20a and mainly captures an image in the traveling direction of the moving body 20a. For example, the moving body 20a analyzes the image captured by the camera 22 to recognize obstacles and the like, and moves while avoiding the obstacles and the like. The camera may be a visible light camera or an infrared camera.

[0050] The tag reader 23 is provided on the moving body 20a and reads information from the wireless tag 40. The tag reader 23 includes an antenna and transmits radio waves or a magnetic field to the wireless tag 40 via the antenna. Then, the radio waves or the magnetic field returned by the wireless tag 40 are received via the antenna. Then, the control circuit included in the tag reader 23 extracts information from the radio waves or the magnetic field received from the wireless tag 40.

[0051] The wireless tag 40 is a tag that transmits or receives (receives and rewrites) data stored in a built-in memory without contact using radio waves or electromagnetic waves. The wireless tag 40 includes an antenna, a control circuit, and a memory. The wireless tag 40 receives radio waves or a magnetic field transmitted from the tag reader 23 via the antenna.

[0052] When the wireless tag 40 receives radio waves, power is generated in the wireless tag 40 by rectification, and the wireless tag 40 performs information processing by operating the control circuit and the memory using the generated power. When the wireless tag 40 receives a magnetic field, power is generated in the wireless tag 40 by resonance, and the wireless tag 40 performs information processing by operating the control circuit and the memory using the generated power.

[0053] Then, the wireless tag 40 transmits the data stored in the memory via the antenna by riding on radio waves or a magnetic field to the tag reader 23. The wireless tag 40 may store, for example, the position information of the location where the wireless tag 40 is embedded in the memory.

[0054] [Outline of the operation of the lighting device] Next, an overview of the operation of the lighting device 10a in Embodiment 2 will be described. The moving body 20a reads, for example, radio tags 40 (e.g., NFC tags) embedded in the floor at regular intervals, and reads a radio signal including the position information transmitted by the radio tag 40. Then, the moving body 20a moves while collating the position information read from the radio tag 40 with the position information stored in advance by itself.

[0055] In addition, the moving body 20a transmits a signal including the ID or address information of the lighting device 10a corresponding to the position information read from the radio tag 40 to the lighting device 10a. Here, the signal may be in the form of radio waves. When the lighting device 10a receives the signal transmitted from the moving body 20a, if the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a matches its own ID or address information, the lighting device 10a changes the light emission mode of the light source 14, or changes the lighting holding time, etc. Note that the light emission mode refers to the dimming rate, color adjustment, blinking state, etc. of the light source 14.

[0056] Specifically, when the lighting device 10a receives the signal transmitted from the moving body 20a, if the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a matches its own ID or address information, the lighting device 10a may turn on the light source 14 fully. Or, when the lighting device 10a receives the signal transmitted from the moving body 20a, if the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a matches its own ID or address information, the lighting device 10a may extend the lighting holding time of the light source 14.

[0057] Or, when the receiving unit 15 receives a signal from the moving body 20a, the control unit 12 may turn on the R-LED light source 14-1 in the lighting circuit unit 11. Also, when the human detection sensor 13 detects the human body 30 while the control unit 12 is turning on the R-LED light source 14-1 in the lighting circuit unit 11, the control unit 12 may turn on all three of the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 in the lighting circuit unit 11.

[0058] Alternatively, when the human detection sensor 13 detects the human body 30, the control unit 12 may cause the lighting circuit unit 11 to turn on all three of the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3.

[0059] FIG. 8 is a sequence diagram when obtaining the position from the wireless tag of the lighting device 10a in Embodiment 2.

[0060] First, the moving body 20a obtains the position from the wireless tag 40 (step S300). The moving body 20 moves itself to read the wireless tag 40 embedded in the floor or the like using the tag reader 23, and obtains the position information stored in the wireless tag 40.

[0061] Next, the moving body 20a identifies the ID of the lighting device 10a (step S301). The moving body 20a identifies the ID of the lighting device 10a corresponding to the position information obtained from the wireless tag 40. For example, the moving body 20a may hold a list in which the ID of the lighting device 10a and the position information where the lighting device 10a exists correspond, and refer to the list to identify the ID of the lighting device 10a corresponding to the position information obtained from the wireless tag 40.

[0062] Subsequently, the moving body 20a transmits a signal including the identified ID of the lighting device 10a (step S302). The moving body 20a generates a signal including information regarding the ID of the lighting device 10a identified in step S21 and transmits it to the lighting device 10a.

[0063] Next, the lighting device 10a emits light for a certain period of time (step S303). When the lighting device 10a receives a signal from the moving body 20a and the ID of the lighting device 10a included in the signal matches its own ID, it emits light for a certain period of time. Here, the certain period of time is, for example, T2 described in FIG. 3. Or, when a predetermined condition is satisfied, the certain period of time may be T1 described in FIG. 3. Note that the predetermined condition may be, for example, when a signal from a human detection sensor is received while emitting light for a predetermined time and a signal from the moving body 20a is received.

[0064] Further, the moving body 20a may be provided with a visible light communication function for performing visible light communication with the lighting device 10a by receiving an optical signal emitted by the lighting device 10a by rapidly switching the dimming level of the light source 14. In this case, the moving body 20a does not acquire position information from the wireless tag 40 embedded in the floor or the like, but acquires position information from address information or the like repeatedly transmitted by the lighting device 10a by visible light communication.

[0065] FIG. 9 is a sequence diagram when the position is acquired by visible light communication of the lighting device 10a in the second embodiment.

[0066] First, the lighting device 10a performs visible light communication (step S400). The lighting device 10a transmits an optical signal including its own address information by rapidly switching the dimming level of the light source 14. Further, the lighting device 10a may transmit an optical signal including its own address information by rapidly blinking the light source 14.

[0067] Next, the moving body 20a acquires the position by visible light communication (step S401). The moving body 20a photographs the lighting device 10a with the camera 22, detects the blinking or the change in the dimming level of the lighting device 10a, and decodes the optical signal. The moving body 20a acquires position information from the address information or the like of the lighting device 10a included in the optical signal.

[0068] Next, the mobile body 20a identifies the ID of the lighting device 10a (step S402). The mobile body 20a identifies the ID of the lighting device 10a corresponding to the position information acquired by visible light communication. For example, the mobile body 20a may hold a list in which the ID of the lighting device 10a and the position information where the lighting device 10a exists correspond, and refer to the list to identify the ID of the lighting device 10a corresponding to the position information acquired by visible light communication.

[0069] Subsequently, the mobile body 20a transmits a signal including the identified ID of the lighting device 10a (step S403). The mobile body 20a generates a signal including information regarding the ID of the lighting device 10a identified in step S21 and transmits it to the lighting device 10a.

[0070] Next, the lighting device 10a emits light for a certain period of time (step S404). When the lighting device 10a receives a signal from the mobile body 20a, if the ID of the lighting device 10a included in the signal matches its own ID, it emits light for a certain period of time. Here, the certain period of time is, for example, T2 described in FIG. 3. Alternatively, when a predetermined condition is satisfied, the certain period of time may be T1 described in FIG. 3. The predetermined condition may be, for example, the case where a signal from the mobile body 20a is received while a signal from the human detection sensor is received and the device is emitting light for a predetermined time.

[0071] (Embodiment 3) In Embodiment 3, the human detection sensor 13 of the lighting device 10 in Embodiment 1 is a radio wave Doppler sensor that utilizes the Doppler effect. Hereinafter, the operation of the lighting device 10 in Embodiment 3 will be described. The Doppler sensor can detect both the human body 30 and the moving body 20 regardless of their temperatures. Therefore, based on the detection by the human detection sensor 13 and the reception of signals from the moving body 20 by the receiving unit 15 within a predetermined time, it is determined whether the moving body 20 exists, and according to the determination, the lighting control of the light source 14 and the control of the lighting holding time are performed. In the above determination, the order of detection by the human detection sensor 13 and reception of signals from the moving body 20 by the receiving unit 15 within a predetermined time does not matter. FIG. 10 is a flowchart showing the operation of the lighting device in Embodiment 3.

[0072] First, the control unit 12 determines whether the receiving unit 15 has received a signal (step S500). The control unit 12 determines whether the receiving unit 15 provided in the lighting device 10 has received a signal transmitted from the signal transmission unit 21 of the moving body 20. Here, the signal is, for example, an infrared remote control signal having a center wavelength of 900 nm or more and 950 nm or less. Alternatively, the signal may be a radio wave signal.

[0073] When the control unit 12 determines that the receiving unit 15 has received a signal (Yes in step S500), the control unit 12 determines that the lighting device 10 has detected the moving body 20 (step S501). That is, the control unit 12 determines that the moving body 20 exists at a predetermined distance from the lighting device 10.

[0074] Subsequently, the control unit 12 causes the lighting circuit unit 11 to emit light from the light source 14 for a time for the moving body 20 (step S503). That is, the control unit 12 causes the lighting circuit unit 11 to emit light from the light source 14 for a time determined to emit light when the moving body 20 is detected. Alternatively, in this case, the control unit 12 may cause the R-LED light source 14-1 in the lighting circuit unit 11 to emit light.

[0075] Also, when the human detection sensor 13 detects the human body 30 while the control unit 12 causes the R-LED light source 14-1 to light in the lighting circuit unit 11, the control unit 12 may cause the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 to all light in the lighting circuit unit 11.

[0076] When the control unit 12 determines that the receiving unit 15 has not received a signal (No in step S500), the control unit 12 determines that the lighting device 10 has detected the human body 30 (step S501). That is, the control unit 12 determines that the human body 30 exists at a predetermined distance from the lighting device 10.

[0077] Subsequently, the control unit 12 causes the light source 14 to emit light for a time for the human body 30 in the lighting circuit unit 11 (step S503). That is, the control unit 12 causes the light source 14 to emit light for a time determined to cause the light source 14 to emit light when the human body 30 is detected in the lighting circuit unit 11. Alternatively, in this case, the control unit 12 may cause the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 to all light in the lighting circuit unit 11.

[0078] (Effects, etc.) The lighting device 10 of the present disclosure includes a receiving unit 15 that receives a signal from the moving body 20, a human detection sensor 13 that detects the presence of the human body 30, and a control unit 12 that changes the light emission mode of the light source 14 according to whether the receiving unit 15 has received a signal and whether the human detection sensor 13 has detected the presence of the human body 30.

[0079] Thereby, the lighting device 10 of the present disclosure can perform appropriate lighting control for each of the human and the moving body 20. Therefore, the lighting device 10 in the embodiment of the present disclosure can improve power consumption efficiency.

[0080] Further, for example, in the lighting device 10 of the present disclosure, when the receiving unit 15 receives a signal, the control unit 12 causes the light source 14 to emit light brighter than in the normal state during the second period, and when the human detection sensor 13 detects the presence of the human body 30, the control unit 12 causes the light source 14 to emit light brighter than in the normal state during the first period, which is longer than the second period.

[0081] Thereby, when there is a high possibility that a person is present, the lighting device 10 of the present disclosure can emit light from the light source for a longer time than when the moving body 20 is present. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

[0082] Further, for example, in the lighting device 10 of the present disclosure, when the human detection sensor 13 detects the presence of the human body 30 while the light source 14 is emitting light brighter than in the normal state based on the signal received by the receiving unit 15, the control unit 12 causes the light source 14 to emit light brighter than in the normal state during the first period from the timing when the presence of the human body 30 is detected.

[0083] Thereby, when a person is present, the lighting device 10 of the present disclosure can emit light from the light source for a longer time than when the moving body 20 is present. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

[0084] Further, for example, in the lighting device 10 of the present disclosure, when the human detection sensor 13 detects the presence of the human body 30, the light source 14 emits white light.

[0085] Thereby, when a person is present, the lighting device 10 of the present disclosure can perform illumination with visible light by which a person can visually recognize an object.

[0086] Further, for example, in the lighting device 10 of the present disclosure, when the receiving unit 15 receives a signal, the light source 14 emits red light.

[0087] Accordingly, when the moving body 20 is present, the lighting device 10 of the present disclosure can perform lighting using light of a color with low energy consumption during irradiation, by utilizing the width of the wavelength of light that can be recognized by the camera provided in the moving body 20. Therefore, the lighting device 10 of the present disclosure can reduce the energy consumption during lighting.

[0088] Also, for example, in the lighting device 10 of the present disclosure, when the human detection sensor 13 detects the presence of the human body 30 and the receiving unit 15 receives a signal within a predetermined time, the control unit 12 resets the light emission time of the light source 14 to the first period.

[0089] Accordingly, even when the moving body 20 is detected, the lighting device 10 of the present disclosure can emit light from the light source for a longer time than when the light source emits light when the moving body 20 is present, when there is a high possibility that a person is present nearby. Therefore, the lighting device 10 of the present disclosure can control the light emission mode more appropriately.

[0090] In the lighting device 10 of the present disclosure, the human detection sensor 13 can detect the moving body 20 in addition to the human body 30. When the control unit 12 receives a signal during a predetermined period immediately before or after the timing when the human detection sensor 13 detects the human body 30 or the moving body 20, the light source 14 emits light brighter than the normal state during the second period.

[0091] Accordingly, when the moving body 20 is present, the lighting device 10 of the present disclosure can emit light from the light source for a shorter time than when a person is present. Therefore, the lighting device 10 of the present disclosure can control the light emission mode more appropriately.

[0092] Also, for example, in the lighting device 10 of the present disclosure, the human detection sensor 13 is a heat ray sensor that detects far-infrared rays having a wavelength of 9 or more and 10 μm or less generated from the human body 30.

[0093] As a result, the lighting device 10 of the present disclosure is small in size, low in power consumption, and can detect the human body 30 using an inexpensive sensor. Therefore, the lighting device 10 of the present disclosure can achieve energy savings and cost reduction.

[0094] In the lighting device 10 of the present disclosure, the moving body 20 moves while acquiring the position information of the moving body 20, transmits a signal including the address information of the lighting device 10 corresponding to the position information, the receiving unit 15 receives the signal transmitted by the moving body 20, and when the address information of the lighting device 10 associated with the position information included in the signal received by the receiving unit 15 matches its own address, the control unit 12 switches the light emission mode of the light source 14.

[0095] As a result, the lighting device 10 of the present disclosure can switch the light emission mode of the light source 14 according to the signal including its own address information among the received signals. Therefore, the lighting device 10 of the present disclosure can select the signal it wants to receive.

[0096] Also, for example, in the lighting device 10 of the present disclosure, the signal is a near-infrared signal having a wavelength of 0.9 or more and 1 μm or less.

[0097] As a result, the lighting device 10 of the present disclosure can detect the moving body 20 using the near-infrared rays used for infrared remote control signals. Therefore, the lighting device 10 of the present disclosure can achieve miniaturization and cost reduction.

[0098] Also, for example, the lighting device 10 of the present disclosure includes a receiving unit 15 that receives a signal from the moving body 20, a human detection sensor 13 that detects the presence of the human body 30, and a control unit that changes the light emission mode of the light source 14 according to whether the receiving unit 15 has received a signal and whether the human detection sensor 13 has detected the presence of the human body 30, and the light source 14.

[0099] As a result, the lighting device 10 of the present disclosure can perform appropriate lighting control for each of the human and the moving body 20. Therefore, the lighting device 10 in the embodiment of the present disclosure can improve power consumption efficiency.

[0100] Further, for example, the lighting control method of the present disclosure includes a receiving step of receiving a signal from the moving body 20, a human detection step of detecting the presence of the human body 30, and a control step of controlling the light source 14 to change the light emission mode of the light source 14 according to whether a signal is received in the receiving step or whether the presence of the human body 30 is detected in the human detection step.

[0101] Thereby, the lighting control method of the present disclosure can perform appropriate lighting control for each of the human and the moving body 20. Therefore, the lighting device 10 in the embodiment of the present disclosure can improve power consumption efficiency.

[0102] (Other) As described above, the embodiments have been described, but the present disclosure is not limited to the above embodiments.

[0103] For example, in the above embodiment, the process executed by a specific processing unit may be executed by another processing unit. Also, the order of a plurality of processes may be changed, or a plurality of processes may be executed in parallel.

[0104] Also, in the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0105] Also, each component may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form one circuit as a whole, or may be separate circuits respectively. Also, these circuits may be general-purpose circuits or dedicated circuits respectively.

[0106] Furthermore, the general or specific aspects of the present disclosure may be implemented in a system, apparatus, method, integrated circuit, computer program, or a recording medium such as a computer-readable CD-ROM. Also, the general or specific aspects of the present disclosure may be implemented in any combination of a system, apparatus, method, integrated circuit, computer program, and recording medium.

[0107] For example, the present disclosure may be implemented as a program for causing a computer to execute the lighting control method of the above-described embodiment. The present disclosure may be implemented as a computer-readable non-transitory recording medium on which such a program is recorded.

[0108] In addition, forms obtained by applying various modifications conceivable by those skilled in the art to each embodiment, or forms realized by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present disclosure are also included in the present disclosure.

Description of Reference Numerals

[0109] 10, 10a Lighting device 11 Lighting circuit section 12 Control section 13 Human detection sensor 14 Light source 15 Receiver 20, 20a Moving body 21 Signal transmission section 22 Camera 23 Tag reader 30 Human body 40 Wireless tag

Claims

1. A receiving unit that receives a signal from a moving body, A human detection sensor that detects the presence of a human body, A control unit that changes the light emission mode of a light source according to whether the receiving unit has received the signal and whether the human detection sensor has detected the presence of the human body, The control unit, When the receiving unit receives the signal, during a second period, causes the light source to emit light brighter than a predetermined state, When the human detection sensor detects the presence of the human body, during a first period longer than the second period, causes the light source to emit light brighter than the predetermined state, When the human detection sensor detects the presence of the human body and the receiving unit receives the signal within a predetermined time, the control unit resets the light emission time of the light source to a first period longer than the second period, An illumination device.

2. The control unit, When the human detection sensor detects the presence of the human body while the light source is emitting light brighter than the predetermined state based on the receiving unit receiving the signal, causes the light source to emit light brighter than the normal state during the first period from the timing when the presence of the human body is detected, The illumination device according to claim 1.

3. When the human detection sensor detects the presence of the human body, the light source emits white light, The illumination device according to claim 1 or 2.

4. When the receiving unit receives the signal, the light source emits red light, The illumination device according to any one of claims 1 to 3.

5. The human detection sensor can detect the moving body in addition to the human body, When the control unit receives the signal during a predetermined period immediately before or after the timing when the human detection sensor detects the human body or the moving body, causes the light source to emit light brighter than a predetermined state during a second period shorter than the first period, The illumination device according to any one of claims 1 to 4.

6. The human detection sensor detects far-infrared rays with a wavelength of 9 or more and 10 μm or less generated from the human body, It is a pyroelectric sensor, The illumination device according to any one of claims 1 to 4.

7. The moving body moves while acquiring position information of the moving body, Transmits the signal including the address information of the illumination device corresponding to the position information, The receiving unit receives the signal transmitted by the moving body, When the address information of the lighting device associated with the position information included in the signal received by the receiving unit matches its own address, the control unit switches the light emission mode of the light source. The lighting device according to any one of claims 1 to 6.

8. The signal is a near-infrared signal having a wavelength of 0.9 or more and 1 μm or less. The lighting device according to any one of claims 1 to 6.

9. The lighting device according to any one of claims 1 to 8, comprising a light source. Lighting device.

10. A receiving step of receiving a signal from a moving body, A human detection step of detecting the presence of a human body, A control step of controlling a light source to change a light emission mode of the light source according to whether or not the signal is received in the receiving step or whether or not the presence of the human body is detected in the human detection step, When the signal is received in the receiving step, in the control step, the light source emits light brighter than a predetermined state during a second period. When the presence of the human body is detected in the human detection step, in the control step, the light source emits light brighter than the predetermined state during a first period longer than the second period. When the signal is received in the receiving step within a predetermined time after the presence of the human body is detected in the human detection step, in the control step, the light emission time of the light source is reset to a first period longer than the second period. Lighting control method.

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