JP2020057839A - Wireless unit and lighting apparatus - Google Patents

Abstract

To obtain a wireless unit and a lighting apparatus that can perform stable wireless communication in the wireless unit and the lighting apparatuses.SOLUTION: A wireless unit according to the present invention includes: a first reception unit for receiving a wireless signal; a wireless communication unit for controlling an external device according to the wireless signal; and a switching unit for switching a reception path of the wireless signal of the wireless communication unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wireless unit and a lighting device.

  Patent Literature 1 proposes a method for securing a communication function of wireless communication in a lighting fixture having a wireless communication function. The lighting fixture disclosed in Patent Literature 1 includes a power supply circuit for supplying power to a light source, an antenna for transmitting or receiving a radio signal, and a fixture main body containing the antenna and the power supply circuit. An opening is formed in the instrument body. The antenna and the opening are arranged such that the strongest polarization plane of the radio wave radiated from the antenna and the strongest polarization plane of the radio wave radiated from the opening substantially coincide with each other.

JP-A-2006-58167

  However, according to Patent Literature 1, when good wireless communication cannot be performed by the above method, it is difficult to further improve the communication function. In particular, when wirelessly controlling an embedded lighting device, an antenna used for wireless control may be embedded in a structure such as a ceiling space from an aesthetic viewpoint. However, a duct or the like of an air conditioner is generally installed behind the ceiling, and a radio signal is blocked, so that there is a possibility that good wireless communication cannot be performed.

  Further, in Patent Document 1, it is necessary to provide an opening in a device main body that houses an antenna. For this reason, a lighting fixture and a fixture main body that do not require wireless communication cannot be shared, and a dedicated design may be required.

  SUMMARY An advantage of some aspects of the invention is to provide a wireless unit and a lighting device capable of performing stable wireless communication.

  A wireless unit according to the present invention includes a first receiving unit that receives a wireless signal, a wireless communication unit that controls an external device according to the wireless signal, and a switching unit that switches a reception path of the wireless signal of the wireless communication unit. , Is provided.

  In the wireless unit according to the present invention, the wireless signal receiving path of the wireless communication unit can be switched. Therefore, when the wireless communication by the first receiving unit is unstable, the wireless communication unit and the first receiving unit can be separated from each other, and another receiving unit can be connected to the wireless communication unit. Therefore, wireless communication can be performed stably.

FIG. 3 is a circuit block diagram of the wireless unit according to Embodiment 1. FIG. 2 is a perspective view of the wireless unit according to Embodiment 1. FIG. 3 is a circuit block diagram of the antenna substrate according to the first embodiment. FIG. 3 is a plan view of the antenna substrate according to the first embodiment. FIG. 9 is a circuit block diagram of a wireless unit according to Embodiment 2. FIG. 14 is a perspective view of a lighting device according to Embodiment 3. FIG. 9 is a plan view of a wireless board according to Embodiment 3. FIG. 14 is a cross-sectional view of a lighting device according to Embodiment 4.

  A wireless unit and a lighting device according to an embodiment of the present invention will be described with reference to the drawings. The same or corresponding components are denoted by the same reference numerals, and description thereof may not be repeated.

Embodiment 1 FIG.
FIG. 1 is a circuit block diagram of the wireless unit 1 according to the first embodiment. The wireless unit 1 includes an interface unit 2, a power supply circuit 3, a wireless communication unit 4, a first receiving unit 7, and a switching unit 8.

  The interface unit 2 connects the wireless communication unit 4 to an external device. The external device is, for example, a lighting circuit. The interface unit 2 includes a terminal receiving a DC voltage from an external device, two UART (Universal Asynchronous Receiver / Transmitter) terminals communicating with the external device, and a ground terminal.

  The power supply circuit 3 converts a DC voltage supplied from the interface unit 2 into an operation voltage at which the wireless unit 1 operates. The wireless communication unit 4 transmits a control signal from the interface unit 2 to an external device according to a wireless signal received by the first receiving unit 7 or another receiving unit connected via the switching unit 8. Thus, the wireless communication unit 4 controls the external device. The first receiving unit 7 receives a wireless signal from the outside.

  The switching unit 8 is provided between the first receiving unit and the wireless communication unit 4. The switching unit 8 controls a connection state between the wireless communication unit 4 and the first receiving unit 7. The switching unit 8 includes a first connection unit 61 having one end electrically connected to the first reception unit 7 and the other end electrically connected to the wireless communication unit 4. The switching unit 8 includes a first matching circuit 6 that electrically connects one end and the other end of the first connection unit 61. The first matching circuit 6 adjusts the wireless sensitivity of the first receiving unit 7. The first matching circuit 6 is a filter circuit including a plurality of capacitors or inductors.

  The switching unit 8 includes a second connection unit 51 electrically connected to the wireless communication unit 4. The second connection unit 51 is provided on a line connecting the wireless communication unit 4 and the first connection unit 61. The first connection terminal 5 is connected to the second connection portion 51. A coaxial cable is connected to the first connection terminal 5. The coaxial cable is electrically connected to a second receiving unit that receives a radio signal as described later.

  Here, in FIG. 1, both the first connection terminal 5 and the first matching circuit 6 are shown for convenience, but only one of the first connection terminal 5 and the first matching circuit 6 is mounted. By mounting the first matching circuit 6 on the first connection unit 61, the first reception unit 7 and the wireless communication unit 4 are connected. At this time, the second connection part 51 is in an open state. Thereby, the wireless communication unit 4 controls the external device according to the wireless signal received by the first receiving unit 7. Further, the first matching circuit 6 and the first connection terminal 5 are mounted on the first connection unit 61 and the second connection unit 51, respectively, and the first reception unit is not connected to the first connection terminal 5 in a state where the coaxial cable is not connected. 7, wireless communication may be performed.

  On the other hand, when the first matching circuit 6 is not mounted on the first connection portion 61 and one end and the other end of the first connection portion 61 are electrically separated, the first connection terminal 5 is connected to the second connection portion 51. , A second receiving unit is connected via a coaxial cable. Thereby, the first receiving unit 7 and the wireless communication unit 4 are separated, and the wireless communication unit 4 can communicate with the second receiving unit. Therefore, the wireless communication unit 4 controls the external device according to the wireless signal received by the second receiving unit.

  As described above, the switching unit 8 switches the reception path of the wireless signal of the wireless communication unit 4. The switching unit 8 is provided such that one of the first receiving unit 7 and the second receiving unit is connected to the wireless communication unit 4.

  FIG. 2 is a perspective view of the wireless unit 1 according to the first embodiment. The wireless unit 1 includes a wireless board 9 on which the interface unit 2, the wireless communication unit 4, the first receiving unit 7, and the switching unit 8 are mounted. The wireless board 9 is housed in a case. The interface unit 2 and the first receiving unit 7 are provided on both sides of the wireless board 9 in the longitudinal direction with the wireless communication unit 4 interposed therebetween. The first receiving unit 7 is arranged at an end of the wireless board 9 in the longitudinal direction.

  The first receiving section 7 is a copper foil pattern formed on the surface of the wireless board 9. The length from the connection point between the first matching circuit 6 and the copper foil pattern to the end of the copper foil pattern on the side opposite to the first matching circuit 6 is 1/1 / the wavelength of the radio signal received by the first receiving unit 7. 4 or more. Thereby, the efficiency of wireless communication can be improved. The first receiving unit 7 may be a chip antenna.

  The first connection unit 61 is formed on the surface of the wireless board 9, one end is electrically connected to the first reception unit 7, the other end is electrically connected to the wireless communication unit 4, and the one end and the other end are connected to each other. This is a separated component pattern. Here, one end and the other end of the component pattern are electrically connected by connecting components such as a capacitor and an inductor. The second connection portion 51 is a connector pattern formed on the surface of the wireless board 9 and electrically connected to the wireless communication portion 4. The connector pattern has a shape corresponding to the first connection terminal 5 to which a coaxial cable is connected, for example. Thus, the wireless board 9 has a mounting space for the first connection terminal 5 and the first matching circuit 6.

  By mounting the first matching circuit 6 or the first connection terminal 5 on the wireless board 9, the wireless communication unit 4 can perform the wireless signal received by the first reception unit 7 or the wireless signal input from the second connection unit 51. The external device is controlled according to.

  The configuration of the wireless board 9 is not limited to those shown in FIGS. The wireless board 9 may have the first receiving unit 7, the wireless communication unit 4, and the switching unit 8 mounted thereon. In the present embodiment, the connection state between the first receiving unit 7 and the wireless communication unit 4 is changed by attaching and detaching the first matching circuit 6. However, the connection state between the first receiving unit 7 and the wireless communication unit 4 may be changed by attaching or detaching another component provided between the first receiving unit 7 and the wireless communication unit 4.

  FIG. 3 is a circuit block diagram of the antenna substrate 20 according to the first embodiment. The antenna substrate 20 includes a second connection terminal 21, a second reception unit 23, and a second matching circuit 22 connected between the second connection terminal 21 and the second reception unit 23. The first connection terminal 5 is connected to the second connection terminal 21 via a coaxial cable. The second matching circuit 22 adjusts the wireless sensitivity of the second receiving unit 23. The second matching circuit 22 is a filter circuit including a plurality of capacitors or inductors.

  FIG. 4 is a plan view of the antenna substrate 20 according to the first embodiment. The second receiving section 23 is a copper foil pattern formed on the surface of the antenna substrate 20. The length from the connection point between the second matching circuit 22 and the copper foil pattern to the end of the copper foil pattern opposite to the second matching circuit 22 is 1/1 / the wavelength of the radio signal received by the second receiving unit 23. 4 or more. Thereby, the efficiency of wireless communication can be improved. The second receiving unit 23 may be a chip antenna.

  The configuration of the antenna substrate 20 is not limited to those shown in FIGS. For example, the shape of the antenna substrate 20 may be changed according to the shape of the installation location or the like.

  By mounting the first matching circuit 6 in the wireless unit 1 according to the present embodiment, wireless communication by the first receiving unit 7 becomes possible. At this time, an external device connected to the interface unit 2 can be controlled according to a command of a wireless signal received by the first receiving unit 7.

  On the other hand, by mounting the first connection terminal 5 on the wireless unit 1 and further connecting the antenna board 20 to the first connection terminal 5 via a coaxial cable, wireless communication by the second reception unit 23 becomes possible. At this time, an external device connected to the interface unit 2 can be controlled according to a command of a wireless signal received by the second receiving unit 23.

  In the wireless unit 1, the receiving path of the wireless signal of the wireless communication unit 4 can be selected from the first receiving unit 7 and the second receiving unit 23. Thereby, for example, even if the wireless communication is unstable at the position of the first receiving unit 7, the wireless communication can be stably performed by switching the receiving path of the wireless signal to the second receiving unit 23. it can.

  These modifications can be appropriately applied to the wireless unit and the lighting device according to the following embodiments. Note that the wireless unit and the lighting fixture according to the following embodiment have many points in common with Embodiment 1, and therefore, the description will focus on differences from Embodiment 1.

Embodiment 2 FIG.
FIG. 5 is a circuit block diagram of a wireless unit 201 according to the second embodiment. The configuration of the switching unit 208 of the wireless unit 201 is different from that of the first embodiment. The switching unit 208 includes a switch 210 that connects or disconnects the first receiving unit 7 and the wireless communication unit 4.

  One end of the first connection unit 61 is electrically connected to the first reception unit, and the other end is electrically connected to one end of the switch 210. The other end of the switch 210 is electrically connected to the wireless communication unit 4. The switch 210 is provided between the first connection unit 61 and the second connection unit 51 on a line connecting the wireless communication unit 4 and the first connection unit 61. The switch 210 is, for example, a slide switch. The first connection circuit 61 has a first matching circuit 6 mounted thereon.

  In the wireless unit 201, the connection state between the wireless communication unit 4 and the first receiving unit 7 can be changed by the switch 210. When the switch 210 is in the connected state, the first receiving unit 7 and the wireless communication unit 4 are connected. Thereby, the wireless communication unit 4 controls an external device connected to the interface unit 2 according to the wireless signal received by the first receiving unit 7. At this time, it is assumed that the first connection terminal 5 is not mounted on the first connection portion 61.

  On the other hand, when wireless communication is performed by the second receiving unit 23, the switch 210 is turned off. Thereby, the first receiving unit 7 and the wireless communication unit 4 are shut off. At this time, the first connection terminal 5 is mounted on the second connection portion 51. Further, the second connection terminal 21 of the antenna substrate 20 is connected to the first connection terminal 5 by a coaxial cable. Therefore, the wireless communication unit 4 controls an external device connected to the interface unit 2 according to the wireless signal received by the second receiving unit 23. At this time, the first matching circuit 6 may be mounted on the first connection unit 61.

  In the present embodiment, by operating the switch 210, the connection state between the wireless communication unit 4 and the first receiving unit 7 can be easily changed. For this reason, by disconnecting the first receiving unit 7 by the switch 210 and connecting the antenna board 20 later, the first receiving unit 7 and the second receiving unit 23 can be switched according to the wireless communication environment. Further, even when the first matching circuit 6 is mounted, the second receiving unit 23 can perform wireless communication by setting the switch 210 to the cutoff state. Therefore, when switching between the first receiving unit 7 and the second receiving unit 23, there is no need to remove the first matching circuit 6, and the receiving path of the wireless signal can be easily changed.

Embodiment 3 FIG.
FIG. 6 is a perspective view of a lighting fixture 300 according to Embodiment 3. The lighting fixture 300 includes the wireless unit 1, a light source unit 333 having a light emitting element provided on a main surface, and a lighting circuit 331. The wireless communication unit 4 controls the lighting circuit 331 according to the wireless signal. Further, the lighting fixture 300 includes a heat sink 332 provided on the opposite side of the light source unit 333 from the light emitting direction of the light emitting element. The heat sink 332 radiates heat from the light source unit 333.

  The lighting circuit 331 lights the light emitting element of the light source unit 333. The lighting circuit 331 supplies DC power to the wireless unit 1. The lighting circuit 331 controls the light source unit 333 according to a control signal from the wireless unit 1. The control signal from the wireless unit 1 includes, for example, lighting, dimming, and turning off commands.

  The wireless unit 1 is attached to the outside of the appliance body 334 including the lighting circuit 331, the heat sink 332, and the light source 333. In the wireless unit 1, the first receiving unit 7 and the wireless communication unit 4 are connected. The lighting circuit 331 is connected to the interface unit 2 of the wireless unit 1. The wireless unit 1 is provided such that its longitudinal end protrudes toward the light emitting direction with respect to the light source unit 333.

  FIG. 7 is a plan view of the wireless board 9 according to the third embodiment. The first receiving unit 7 is disposed at an end of the wireless board 9 in the longitudinal direction. For this reason, the first receiving unit 7 is provided on the light emitting direction side of the light emitting element with respect to the main surface of the light source unit 333 on which the light emitting element is provided.

  Thus, the wireless board 9 is provided so that the longitudinal direction is along the optical axis direction of the light source unit 333. The first receiving unit 7 is provided at one end in the longitudinal direction of the wireless board 9, and the interface unit 2 is provided at the other end. For this reason, in the optical axis direction of the light source unit 333, the first receiving unit 7 can be arranged closer to the light emitting direction than the main surface on which the light emitting element is provided. Therefore, the first receiving unit 7 can easily receive a wireless signal from the outside. In particular, when the lighting fixture 300 is embedded in a mounting part such as a ceiling, the first receiving unit 7 can be exposed from the mounting part. Therefore, stable wireless communication can be performed.

  Further, the interface section 2 on the other end side of the wireless board 9 and the lighting circuit 31 can be brought close to each other. Therefore, the wiring distance between the lighting circuit 31 and the wireless unit 1 can be reduced. Therefore, the influence of noise can be suppressed, and communication of control signals between the lighting circuit 331 and the wireless unit 1 can be stabilized.

  Further, in the present embodiment, since the wireless unit 1 is attached to the outside of the appliance body 334, the wireless unit 1 can be easily attached and detached. In addition, the lighting fixture that does not perform wireless communication and the fixture main body 334 can be shared.

  Note that the wireless unit 1 transmits a control signal to the lighting circuit 331 according to a wireless signal from an external device. Here, the external device may be, for example, a remote controller, a human sensor, a temperature sensor, an illuminance sensor, or the like.

Embodiment 4 FIG.
FIG. 8 is a cross-sectional view of a lighting device 400 according to Embodiment 4. The lighting fixture 400 includes a light source unit 333 having a light emitting element 333a provided on a main surface. A heat sink 332 is provided on the opposite side of the light source 333 from the light emitting direction of the light emitting element 333a. In addition, a reflector 440 is provided on the light emission direction side of the light emitting element 333a with respect to the light source unit 333. The reflector 440 is provided so as to surround the light source unit 333, and reflects light emitted from the light emitting element 333a. The reflector 440 is fixed to the heat sink 332. The reflector 440 is formed from, for example, a resin.

  A lighting circuit 331 for lighting the light emitting element 333 a is provided on a side surface of the heat sink 332. The wireless board 9 is provided on a side surface of the heat sink 332. The wireless board 9 is provided immediately below the lighting circuit 331. In the present embodiment, the first receiving unit 7 is provided on the side opposite to the light emitting direction of the light emitting element 333a with respect to the light source unit 333.

  The antenna substrate 20 is provided between the heat sink 332 and the reflector 440. That is, the second receiving unit 23 is provided between the heat sink 332 and the reflector 440. As shown in FIG. 4, a cutout 24 is formed in the antenna substrate 20 along the light source 333. As shown in FIG. 8, the first connection terminal 5 of the wireless board 9 and the second connection terminal 21 of the antenna board 20 are connected by a coaxial cable 441. The coaxial cable 441 passes through the inside of the instrument body 434 and connects the wireless board 9 and the antenna board 20. In the wireless board 9, the first receiving unit 7 is separated from the wireless communication unit 4.

  Lighting device 400 according to the present embodiment is an example of an embedded lighting device. In the present embodiment, the wireless board 9 is stored behind the ceiling. Above the ceiling, stable wireless communication may be difficult due to the air conditioning equipment ducts and the like. On the other hand, since the second receiving unit 23 is provided between the heat sink 332 and the reflector 440, it is not stored on the ceiling. Therefore, stable wireless communication can be performed by the second receiving unit 23.

  Furthermore, since the antenna substrate 20 is housed between the heat sink 332 and the reflector 440, the design surface of the light source unit 333 can be unified with a lighting fixture without the antenna substrate 20.

  FIG. 8 illustrates the lighting fixture 400 including the antenna substrate 20. Here, the lighting fixture 400 may be used in a state where the first receiving unit 7 and the wireless communication unit 4 are connected without providing the antenna substrate 20. In this case, for example, when the communication state of the first receiving unit 7 is not sufficient, the first receiving unit 7 is disconnected from the wireless communication unit 4 and the antenna board 20 is connected later. As described above, the antenna to be used may be selected from the first receiving unit 7 and the second receiving unit 23 according to the communication state or the installation environment.

  Further, wireless unit 201 of Embodiment 2 may be mounted on lighting fixture 400. Thereby, the antenna used by the switch 210 from the outside can be selected from the first receiving unit 7 and the second receiving unit 23. When the second receiving unit 23 is selected, the antenna substrate 20 is connected later. Thereby, the wireless communication unit 4 controls the lighting circuit according to the wireless signal received by the first receiving unit 7 or the wireless signal received by the second receiving unit 23. Therefore, the communication performance can be easily improved according to the communication state or the installation environment.

  The second receiving unit 23 is not limited to be provided between the heat sink 332 and the reflector 440, and may be provided so as to be exposed from a mounting unit such as a ceiling. For example, the second receiving unit 23 may be provided on the light emitting direction side of the main surface of the light source unit 333.

  Note that the technical features described in the embodiments may be combined as appropriate.

  1, 201 wireless unit, 2 interface unit, 3 power supply circuit, 4 wireless communication unit, 5 first connection terminal, 6 first matching circuit, 7 first receiving unit, 8, 208 switching unit, 9 wireless board, 20 antenna board , 21 second connection terminal, 22 second matching circuit, 23 second reception section, 51 second connection section, 61 first connection section, 210 switch, 300, 400 lighting fixture, 331 lighting circuit, 332 heat sink, 333 light source section , 333a Light emitting element, 334, 434 Instrument body, 440 Reflector, 441 Coaxial cable

Claims (13)

A first receiving unit that receives a wireless signal;
A wireless communication unit that controls an external device according to a wireless signal;
A switching unit that switches a reception path of the wireless signal of the wireless communication unit,
A wireless unit comprising: The switching unit includes:
A first connection unit having one end electrically connected to the first reception unit and the other end electrically connected to the wireless communication unit;
A matching circuit for electrically connecting the one end and the other end of the first connection portion;
A second connection unit electrically connected to the wireless communication unit;
With
The second connection portion is in an open state;
The wireless unit according to claim 1, wherein the wireless communication unit controls the external device according to the wireless signal received by the first receiving unit. The switching unit includes:
A first connection portion, one end of which is electrically connected to the first receiving portion, the other end of which is electrically connected to the wireless communication portion, and wherein the one end and the other end are electrically separated;
A second connection unit electrically connected to the wireless communication unit;
With
A second receiving unit that receives a wireless signal is electrically connected to the second connection unit,
The wireless unit according to claim 1, wherein the wireless communication unit controls an external device according to the wireless signal received by the second receiving unit. The first receiving unit, the wireless communication unit, comprising a wireless substrate mounted with the switching unit,
The switching unit includes:
For a component formed on the surface of the wireless board, one end of which is electrically connected to the first receiving unit, the other end is electrically connected to the wireless communication unit, and the one end and the other end are separated. A first connection portion which is a pattern;
A second connection portion formed on the surface of the wireless substrate and being a connector pattern electrically connected to the wireless communication portion;
With
The wireless communication device according to claim 1, wherein the wireless communication unit controls the external device according to the wireless signal received by the first receiving unit or a wireless signal input from the second connection unit. unit.   The wireless unit according to claim 1, wherein the switching unit includes a switch that connects or disconnects the first receiving unit and the wireless communication unit. The switching unit includes:
A first connection part, one end of which is electrically connected to the first reception part, and the other end of which is electrically connected to one end of the switch;
A matching circuit for electrically connecting the one end and the other end of the first connection portion;
A second connection unit electrically connected to the wireless communication unit;
With
The other end of the switch is electrically connected to the wireless communication unit, and the second connection unit is electrically connected to a second reception unit that receives a wireless signal.
The wireless unit according to claim 5, wherein the wireless communication unit controls an external device according to the wireless signal received by the second receiving unit. An interface unit that connects the wireless communication unit and the external device;
A wireless board on which the interface unit, the wireless communication unit, the first receiving unit, and the switching unit are mounted;
With
The wireless unit according to any one of claims 1 to 6, wherein the interface unit and the first receiving unit are provided on both sides of the wireless board in a longitudinal direction with the wireless communication unit interposed therebetween.   8. The wireless device according to claim 1, wherein the first receiving unit is a copper foil pattern or a chip antenna, and has a length equal to or more than ４ of a wavelength of the wireless signal. 9. unit.   4. The wireless unit according to claim 3, wherein the second receiving unit is a copper foil pattern or a chip antenna, and has a length equal to or more than １ ／ of a wavelength of the wireless signal. 5. A wireless unit according to any one of claims 1 to 9, and
A light source section having a light emitting element provided on a main surface,
A lighting circuit for lighting the light emitting element;
With
The lighting device, wherein the wireless communication unit controls the lighting circuit according to the wireless signal.   The lighting device according to claim 10, wherein the first receiving unit is provided on a light emission direction side of the light emitting element with respect to the main surface of the light source unit. With respect to the light source unit, a heat sink provided on a side opposite to a light emitting direction of the light emitting element,
With respect to the light source unit, a reflector provided on the light emitting direction side of the light emitting element and surrounding the light source unit,
A second receiving unit that is provided between the heat sink and the reflector and receives a wireless signal;
With
The wireless communication unit controls the lighting circuit according to the wireless signal received by the first receiving unit or the wireless signal received by the second receiving unit. Lighting equipment.   The lighting device according to claim 12, wherein the first receiving unit is provided on a side opposite to a light emitting direction of the light emitting element with respect to the light source unit.

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