JP6575067B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture capable of mounting a wireless communication unit inside a lighting fixture without exposing an antenna of the wireless communication unit.

  Conventionally, transmission / reception of signals between the lighting control device and the plurality of lighting fixtures has been performed by connecting the lighting control device and the plurality of lighting fixtures with signal lines. A signal to be transmitted / received is a PWM (Pulse Width Modulation) signal or the like. The lighting circuit of the lighting fixture performs lighting control (dimming control) of the lighting fixture by changing the current flowing through the light source based on the PWM signal. However, the wiring work of the signal line connecting the lighting control device and the plurality of lighting fixtures is very complicated.

  On the other hand, Patent Document 1 discloses a technique in which a lighting device is provided with a detachable wireless communication module that wirelessly receives a command from a user. In this technique, a command from a user is input by a remote controller, and switching is performed between the remote controller and the wireless communication module so that various wireless communication systems can be used.

JP 2013-235837 A

  However, Patent Document 1 does not show a specific method or structure for attaching the wireless communication module to the lighting fixture. When the wireless communication module is shielded by a sheet metal of a lighting fixture, the characteristics of the antenna are remarkably deteriorated and communication becomes impossible. Therefore, when attaching a wireless communication module to a lighting fixture, the antenna portion of the wireless communication unit has to be exposed outside the lighting fixture.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a lighting fixture capable of mounting a wireless communication unit inside a lighting fixture without exposing the antenna of the wireless communication unit. Is.

Lighting device according to the present invention includes a light source, a lighting circuit for lighting control of the light source, and the metal plate, attached to the sheet metal, is disposed on the back side of the light source, connected to the lighting circuit, the other luminaires Or a wireless communication unit that performs wireless communication with a lighting control device, the wireless communication unit being housed in a space in a lighting fixture and fixed to the sheet metal, and housed in the wireless communication unit case A wireless communication module substrate and an antenna provided on the wireless communication module substrate, wherein the wireless communication module substrate is disposed with a spatial distance of 10 mm or more from the sheet metal. To do.

  In the present invention, the wireless communication module substrate provided with the antenna is arranged with a spatial distance of 10 mm or more from the sheet metal of the lighting fixture. For this reason, it is possible to improve the antenna characteristics by securing a space around which the radio waves around the antenna are routed. Therefore, the wireless communication unit can be mounted inside the lighting fixture without exposing the antenna of the wireless communication unit.

It is a perspective view which shows the lighting fixture which concerns on Embodiment 1 of this invention. It is a perspective view which shows the radio | wireless communication unit which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the radio | wireless communication unit which concerns on Embodiment 1 of this invention. It is a figure which shows the lighting fixture which concerns on Embodiment 2 of this invention. It is a figure which shows the port specification of an interface. It is a figure which shows the lighting fixture which concerns on Embodiment 3 of this invention.

  A lighting apparatus 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 repeated description may be omitted.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a lighting fixture according to Embodiment 1 of the present invention. The lighting fixture 1 includes an LED module 2 having at least one LED, a lighting circuit 3 that controls the lighting of the LED module 2, and a wireless communication that is connected to the lighting circuit 3 and performs wireless communication with other lighting fixtures or lighting control devices. Unit 4 is provided.

  When the wireless communication unit 4 receives the dimming command value from the lighting control device, the wireless communication unit 4 transmits the command to the lighting circuit 3. The lighting circuit 3 controls the lighting of the LED module 2 according to the dimming command value.

  FIG. 2 is a perspective view showing the wireless communication unit according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view showing the wireless communication unit according to Embodiment 1 of the present invention. A wireless communication unit case 5 is fixed to a sheet metal 6 of the lighting fixture 1 with screws 7. A wireless communication module substrate 8 is accommodated in the wireless communication unit case 5. The material of the wireless communication unit case 5 is preferably a resin that does not block radio waves. On the wireless communication module substrate 8, an antenna 9, a wireless communication module 10 that communicates signals transmitted and received by the antenna 9 with the lighting circuit 3, and a connector 11 that is connected to the lighting circuit 3 are provided.

  The board fixing mechanism 12 provided in the wireless communication unit case 5 fixes the stored wireless communication module board 8 at a position having a height of 10 mm or more from the bottom surface of the wireless communication unit case 5. Therefore, when the wireless communication unit case 5 is fixed to the sheet metal 6 of the lighting fixture 1 with the screw 7, the wireless communication module substrate 8 is disposed with a spatial distance d of 10 mm or more from the sheet metal 6.

  When the communication distance was measured by changing the spatial distance between the sheet metal 6 of the lighting fixture 1 and the wireless communication module substrate 8 to 5 mm, 10 mm, and 30 mm, the communication distance was 0.3 m, 1 m, and 12 m. This means that the greater the spatial distance, the greater the wraparound of radio waves and the longer the communication distance. Here, when the wireless communication unit 4 is provided inside the luminaire 1, a communication distance of 1 m or more is required at least in order to reliably perform wireless communication with other luminaires or illumination control devices. Therefore, the spatial distance between the sheet metal 6 of the lighting fixture 1 and the wireless communication module substrate 8 needs to be 10 mm or more.

  In the present embodiment, the wireless communication module substrate 8 provided with the antenna 9 is arranged with a spatial distance of 10 mm or more from the sheet metal 6 of the lighting fixture 1. For this reason, it is possible to improve the antenna characteristics by securing a space around which the radio waves around the antenna 9 are routed. Therefore, the wireless communication unit 4 can be mounted inside the lighting fixture 1 without exposing the antenna 9 of the wireless communication unit 4.

  In addition, if the spatial distance between the antenna 9 arranged on the wireless communication module substrate 8 and the sheet metal 6 of the lighting fixture 1 is separated by 10 mm or more, the antenna characteristics can be improved. Considering the point of use in a better state, it is preferable to separate the sheet metal 6 from the antenna 9 by 15 mm or more. Regarding the upper limit of the distance to be separated, a range in which the wireless communication unit case 5 can be accommodated in the space in the luminaire 1 is preferable in terms of appearance. A part of the wireless communication unit case 5 may be exposed from the lighting fixture 1.

Embodiment 2. FIG.
FIG. 4 is a diagram showing a lighting fixture according to Embodiment 2 of the present invention. The wireless communication unit 4 is connected to the lighting circuit 3 by at least four wires 13. The wiring length of the wiring 13 is ½ or more of the radio wave wavelength used in the wireless communication unit 4. For example, when the frequency of the wireless communication unit 4 is 2.4 GHz, the radio wave wavelength is about 12 cm, so that ½ of the wavelength is 6 cm. In this case, the wiring length of the wiring 13 is 6 cm or more.

  FIG. 5 is a diagram showing the port specifications of the interface. The interface of the lighting circuit 3 connected to the wireless communication unit 4 includes a Vcc terminal that supplies power, a Tx terminal that transmits an answer to the command, an Rx terminal that receives the command, and a GND terminal. The interface of the wireless communication unit 4 connected to the lighting circuit 3 includes a Vcc terminal to which power is supplied, an Rx terminal for receiving an answer to the command, a Tx terminal for transmitting the command, and a GND terminal. Have.

  By using such interface port specifications, the lighting circuit 3 can supply power to the wireless communication unit 4 and perform bidirectional serial communication with the circuit GND in common. In addition, antenna characteristics are important for the wireless communication unit 4 to perform stable wireless communication with other lighting fixtures or lighting control devices, and a part of the antenna characteristics is carried by the pattern of the circuit GND.

  The lighting circuit 3 and the circuit GND of the wireless communication unit 4 are connected by one line of the wiring 13 so as to be common. The connection by the wiring 13 is for the purpose of electrical connection, and is not considered as a pattern of the circuit GND that bears antenna characteristics, and the mutual influence is reduced. This means that the influence of noise or the like superimposed on the circuit GND of the lighting circuit 3 does not affect the antenna characteristics and communication characteristics of the wireless communication unit 4.

  In addition, when radio waves are out of phase due to reflection and become opposite phases, the reception state is deteriorated. On the other hand, when the phase is the same, the radio waves are strengthened and the reception state is improved. The wiring 13 having a wiring length of ½ or more of the radio wave wavelength can move the wireless communication unit 4 by ½ or more of the radio wave wavelength. For this reason, even when the radio wave is in an opposite phase and the communication state is bad, the communication characteristics can be improved by moving the wireless communication unit 4 so that the radio wave is in the same phase.

  As described above, in the present embodiment, the wireless communication unit 4 and the lighting circuit 3 are connected by the wiring 13, and the wiring length is set to ½ or more of the radio wave wavelength. The characteristics can be easily improved.

  In addition, as the wiring 13 between the lighting circuit 3 and the wireless communication unit 4, the preferable example in which the power obtained by the lighting circuit 3 is provided to the wireless communication unit 4 by the wiring 13 between the Vcc terminals has been described. However, for example, a configuration may be adopted in which the wireless communication unit 4 is provided from an external power supply supplied to the lighting circuit 3 by another wiring.

Embodiment 3 FIG.
FIG. 6 is a diagram showing a lighting fixture according to Embodiment 3 of the present invention. The wireless communication unit 4 is fixed by a movable fixing mechanism 14 that can move with respect to the sheet metal 6. The distance that the wireless communication unit 4 can move with respect to the sheet metal 6 is ½ or more of the radio wave wavelength used in the wireless communication unit 4. For this reason, as described in the second embodiment, the phase in which the radio wave is shifted due to reflection can be corrected to a strengthening phase.

  By attaching the wireless communication unit 4 to the movable fixing mechanism 14 that can be slid and moved, the antenna characteristics can be easily obtained even when communication with other lighting fixtures or lighting control devices becomes impossible after the lighting fixture 1 is installed. In addition, communication characteristics can be improved.

  Further, the phase shift is caused by reflection from an object in the vicinity of the luminaire 1 and thus varies greatly depending on the space in which the luminaire 1 is installed. In this way, even under a situation where the lighting fixture 1 is affected by reflection at the site where the lighting apparatus 1 is installed, the arrangement of the wireless communication units 4 can be individually adjusted to an optimum state.

DESCRIPTION OF SYMBOLS 1 Lighting fixture, 2 LED module, 3 lighting circuit, 4 wireless communication unit, 5 wireless communication unit case, 6 sheet metal, 8 wireless communication module board, 9 antenna, 13 wiring, 14 movable fixing mechanism

Claims (3)

A light source;
A lighting circuit for controlling lighting of the light source;
Sheet metal,
A wireless communication unit attached to the sheet metal, disposed on the back side of the light source , connected to the lighting circuit, and wirelessly communicating with other lighting fixtures or lighting control devices,
The wireless communication unit is
A wireless communication unit case housed in a space in a lighting fixture and fixed to the sheet metal;
A wireless communication module substrate housed in the wireless communication unit case;
An antenna provided on the wireless communication module substrate;
The wireless communication module substrate is disposed with a spatial distance of 10 mm or more from the sheet metal. The wireless communication unit is connected to the lighting circuit by wiring,
The lighting fixture according to claim 1, wherein a wiring length of the wiring is ½ or more of a radio wave wavelength used in the wireless communication unit. The wireless communication unit is fixed by a movable fixing mechanism capable of moving with respect to the sheet metal,
3. The lighting apparatus according to claim 1, wherein a distance that the wireless communication unit can move with respect to the sheet metal is ½ or more of a radio wave wavelength used in the wireless communication unit. 4. .

Images