JP7031357B2 - lighting equipment - Google Patents

Description

The present invention relates to a control unit and a luminaire.

Patent Document 1 discloses a lighting fixture having a function of contactlessly charging a load device such as a mobile phone. This luminaire has a common power supply circuit, a drive circuit, and a high-frequency inverter circuit. The drive circuit uses the power supplied from the common power supply circuit to turn on the light source. Further, the high frequency inverter circuit converts the power supplied from the common power supply circuit into high frequency power and supplies it to the primary coil. As a result, an AC magnetic field is generated in the primary coil. At this time, by placing the load device in the power supply area, the electric power can be transferred to the load device.

Japanese Unexamined Patent Publication No. 2013-145654

In general, a control unit having a sensor element may be supplied with electric power from an external power source to control a lighting device. The sensor element is, for example, a motion sensor, and changes the brightness of a light source connected to a lighting device depending on the presence or absence of a person. Further, as a wireless communication technology, Wi-Fi (registered trademark) or Bluetooth (registered trademark) is generally used.

In wireless communication, if there is a shield between communication devices, the stability of communication may be significantly deteriorated. In addition, the accuracy of detection by sensors generally depends largely on the number of sensors existing in a certain space and the presence of obstacles. The larger the number of sensors, the higher the detection accuracy, and the larger the number of obstructions, the lower the detection accuracy tends to be. Therefore, it is preferable to arrange the wireless communication device and the control unit in a place where the influence of the shield is as small as possible.

Further, in order to supply power for operating a wireless communication device or a control unit, a power line for connecting to an external power source is generally required. In this case, the wireless communication device or control unit needs to be installed in a place where power can be supplied from an external power source. Further, in some cases, it is necessary to form a power supply circuit for converting the external power supply into the power required for the operation of the wireless communication device or the control unit. Therefore, there is a concern that the size of the wireless communication device or the control unit will increase. In addition, it may not be possible to install lighting equipment in a narrow space due to the increase in size of the wireless communication device or control unit. From the above, the place where the wireless communication device and the control unit can be installed may be limited.

The lighting fixture of Patent Document 1 assumes that the battery of the load device is charged on the desk surface. When power is supplied to the sensor from such a lighting fixture, the detection accuracy may decrease due to the influence of a shield. Further, in Patent Document 1, power is supplied by placing a load device in the power supply area. Therefore, when the operating power is supplied from the lighting equipment to the sensor without going through the battery, the power supply may not be stable and the sensor may not operate normally.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a control unit and a lighting fixture capable of improving the degree of freedom in the installation location.

The lighting equipment according to the present disclosure operates by a lighting device, a light source, a power receiving coil that generates a voltage according to an AC magnetic field, and a voltage generated in the power receiving coil, and wirelessly transmits an external state or a signal from the outside. The lighting device includes a control unit including an option unit for detecting, a first switching power supply unit for lighting the light source by turning on / off the switching element, a second switching power supply unit for generating an AC voltage, and the lighting device. A transmission coil for generating the AC magnetic field from an AC voltage is provided .

The control unit according to the present invention operates by non-contact power feeding via a power receiving coil. Therefore, it is not necessary to install the control unit in a place where power can be supplied from an external power source, and the degree of freedom in the installation place can be improved.

It is a circuit block diagram of the lighting fixture which concerns on Embodiment 1. FIG. It is a perspective view of the lighting equipment which concerns on Embodiment 1. FIG. It is a circuit block diagram of the lighting fixture which concerns on Embodiment 2. FIG. It is a circuit block diagram of the control unit which concerns on Embodiment 2. FIG. It is a flowchart explaining the operation of the control unit which concerns on Embodiment 2. It is a circuit block diagram of the control unit which concerns on Embodiment 3. FIG. It is a perspective view of the lighting equipment which concerns on Embodiment 4. FIG. FIG. 3 is a perspective view showing a state in which the light source unit and the control unit are removed from the main body of the lighting fixture according to the fourth embodiment. It is a perspective view which shows the state which removed the control unit from the light source unit in the luminaire which concerns on Embodiment 4. FIG. It is a circuit block diagram of the control unit which concerns on Embodiment 5. It is a circuit block diagram of the control unit which concerns on Embodiment 6.

The control unit and the lighting fixture according to the embodiment of the present invention will be described with reference to the drawings. The same or corresponding components may be designated by the same reference numerals and the description may be omitted.

Embodiment 1.
FIG. 1 is a circuit block diagram of the lighting fixture 1 according to the first embodiment. The lighting fixture 1 includes a lighting device 50, an LED light source unit 80, and a control unit described later. The lighting device 50 is supplied with electric power from the external power supply AC to light the LED light source unit 80. The external power supply AC is a commercial power supply. The external power supply AC supplies an AC voltage to the lighting device 50.

The LED light source unit 80 includes a plurality of light sources 81. The plurality of light sources 81 are LEDs. A plurality of light sources 81 are connected in series. The LED light source unit 80 may include one or more light sources 81. Further, the plurality of light sources 81 may be connected in parallel or in series-parallel.

The lighting device 50 includes terminal portions CN1 and CN2. The terminal portion CN1 is an input terminal of the lighting device 50 and is connected to an external power supply AC. The terminal portion CN2 is an output terminal of the lighting device 50 and is connected to the LED light source portion 80.

The lighting device 50 includes a rectifier DB. The rectifier DB rectifies the AC voltage input to the lighting device 50 from the external power supply AC. A step-up chopper circuit is connected to the output end of the rectifier DB. The boost chopper circuit is composed of a coil L1, a switching element Q1, and a diode D1.

The switching element Q1 is, for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effective Transistor). One end of the coil L1 is connected to the output on the high potential side of the rectifier DB. The drain of the switching element Q1 and the anode of the diode D1 are connected to the other end of the coil L1. The source of the switching element Q1 is connected to the output on the low potential side of the rectifier DB. The gate of the switching element Q1 is connected to the MOSFET driver 41. The cathode of the diode D1 is connected to the positive electrode of the capacitor C1. The negative electrode of the capacitor C1 is connected to the output on the low potential side of the rectifier DB.

The boost chopper circuit converts the pulsating voltage obtained by rectifying the AC voltage with the rectifier DB into a DC high voltage. The DC high voltage, which is the output voltage of the step-up chopper circuit, is applied to both ends of the capacitor C1. The step-up chopper circuit charges the capacitor C1 and generates a constant DC high voltage.

A series circuit of resistors R2 and R3 is connected in parallel with the capacitor C1. The voltage charged in the capacitor C1 is divided by the resistances R2 and R3 and input to the terminal P1 of the first control unit IC1. The first control unit IC1 outputs a switching signal for turning on / off the switching element Q1 from the terminal Vg1 so that the voltage applied to both ends of the capacitor C1 matches a constant DC voltage. That is, the first control unit IC1 turns on and off the switching element Q1 so that the voltage of the terminal P1 becomes a constant voltage.

The first control unit IC1 is, for example, a microcomputer. Generally, the operating voltage of the microcomputer is lower than the driving voltage of the MOSFET. Therefore, a switching signal is once input to the MOSFET driver 41 from the terminal Vg1. The first control unit IC1 switches the switching element Q1 via the MOSFET driver 41. As a result, stable switching can be realized.

A back converter circuit is connected to the capacitor C1 charged with a constant DC voltage. The back converter circuit is a lighting circuit composed of a switching element Q2, a coil L2, and a diode D2. The switching element Q2 is, for example, a MOSFET. The drain of the switching element Q2 is connected to the positive electrode of the capacitor C1. One end of the coil L2 and the cathode of the diode D2 are connected to the source of the switching element Q2. The gate of the switching element Q2 is connected to the MOSFET driver 41.

The other end of the coil L2 is connected to the positive electrode of the capacitor C3. The anode of the diode D2 is connected to the negative electrode of the capacitor C1. The negative electrode of the capacitor C3 is connected to the negative electrode of the capacitor C1 via the resistor R4. The terminal portion CN2 is connected to the capacitor C3. The capacitor C3 is connected to the LED light source unit 80 via the terminal unit CN2.

The back converter circuit steps down the DC voltage applied to the capacitor C1 and supplies it to the LED light source unit 80. The high frequency voltage output by the back converter circuit is smoothed by the capacitor C3, and the light source 81 is turned on. The current that flows when the light source 81 is turned on is converted into a voltage by the resistance R4. This voltage is input to the terminal P2 of the first control unit IC1. The first control unit IC1 outputs a switching signal for turning on / off the switching element Q2 from the terminal Vg2 so that the voltage of the terminal P2 becomes constant. Therefore, the current flowing through the light source 81 is kept constant. The light source 81 is turned on by constant current control.

The switching signal from the terminal Vg2 is input to the MOSFET driver 41 in the same manner as the step-up chopper circuit. The first control unit IC1 switches the switching element Q2 via the MOSFET driver 41. As a result, stable switching can be realized.

In the present embodiment, the boost chopper circuit and the back converter circuit form the first switching power supply unit 51. The first switching power supply unit 51 is supplied with electric power from the external power supply AC, and turns on the light source 81 by turning on / off the switching elements Q1 and Q2. Further, the first control unit IC1 is supplied with electric power from the control power supply V1 to control the first switching power supply unit 51.

The control power supply circuit unit 42 generates a voltage of the control power supply V1 from the electric charge stored in the capacitor C1. The control power supply circuit unit 42 generates the voltage of the control power supply V1 from the DC voltage which is the output voltage of the boost chopper circuit. The voltage of the control power supply V1 is smoothed by the capacitor C2. The voltage of the control power supply V1 is, for example, 15V. The control power supply circuit unit 42 may be a step-down converter circuit such as a back converter circuit, or a buck-boost converter such as a flyback circuit.

The MOSFET driver 41 is operated by being supplied with electric power from the control power supply V1. That is, the control power supply V1 is a power supply that drives the first switching power supply unit 51. Further, the voltage of the control power supply V1 is stepped down by the step-down circuit unit 43. The voltage of the control power supply V1 is input to the terminal VDD of the first control unit IC1 via the step-down circuit unit 43. Therefore, the first control unit IC1 is operated by being supplied with electric power from the control power supply V1. The voltage of the terminal VDD is, for example, 5V.

The lighting device 50 further includes a second control unit IC10. The voltage of the control power supply V1 is input to the terminal Vcc of the second control unit IC10. The second control unit IC10 is supplied with electric power from the control power supply V1 and operates.

The lighting device 50 further includes a second switching power supply unit 52. The second switching power supply unit 52 includes a switching element Q10 and a switching element Q11. The switching elements Q10 and Q11 are, for example, MOSFETs. The drain of the switching element Q10 is connected to the control power supply V1. The source of the switching element Q10 is connected to the drain of the switching element Q11. The source of the switching element Q11 is connected to the ground terminal GND. The gates of the switching elements Q10 and Q11 are connected to the terminals Vg10 and Vg11 of the second control unit IC10, respectively. The switching elements Q10 and Q11 form a half-bridge circuit.

One end of the power transmission coil T10 is connected to the connection point between the source of the switching element Q10 and the drain of the switching element Q11. The other end of the power transmission coil T10 is connected to one end of the capacitor C10. The other end of the capacitor C10 is connected to the ground terminal GND. The capacitor C10 operates as a coupling capacitor.

The second control unit IC10 outputs a drive signal for alternately turning on the switching elements Q10 and Q11 from the terminal Vg10 and the terminal Vg11. As a result, the second switching power supply unit 52 converts the voltage of the control power supply V1 into an AC voltage. The voltage of the control power supply V1 is converted into a high frequency AC voltage and applied to the power transmission coil T10. The power transmission coil T10 generates an AC magnetic field from this AC voltage. The power transmission coil T10 is a power transmission side coil for non-contact power feeding.

The second control unit IC10 is supplied with electric power from the control power supply V1 and controls the second switching power supply unit 52. The second control unit IC10 controls the non-contact power supply.

In the present embodiment, the first control unit IC1 and the second control unit IC10 form the control unit 40. The control unit 40 controls the first switching power supply unit 51 and the second switching power supply unit 52. The control power supply V1 supplies electric power to the control unit 40.

FIG. 2 is a perspective view of the lighting fixture 1 according to the first embodiment. The lighting fixture 1 has a fixture main body 1a, a light source unit 1b, and a control unit 2. The appliance body 1a is attached to, for example, a ceiling surface. The light source unit 1b includes an LED light source unit 80. The lighting device 50 is housed in, for example, the appliance main body 1a. The control unit 2 is attached to the side surface of the instrument main body 1a. A power transmission coil T10 is provided inside the portion of the instrument body 1a to which the control unit 2 is attached.

The control unit 2 includes, for example, a sensor element that detects an external state. The control unit 2 is, for example, a motion sensor. The control unit 2 may include a wireless communication unit that wirelessly communicates with an external device. Further, the control unit 2 includes a power receiving coil. The power transmission coil T10 and the power reception coil are provided adjacent to each other. By applying an AC voltage to the power transmission coil T10, a voltage is generated in the power receiving coil by electromagnetic induction. The power receiving coil generates a voltage according to the AC magnetic field generated by the power transmission coil T10. The power receiving coil converts the AC magnetic field generated by the power transmission coil T10 into a voltage.

The control unit 2 operates by the voltage generated in the power receiving coil. The control unit 2 includes a control circuit. The control circuit is operating by the voltage generated by the power receiving coil.

In the present embodiment, non-contact power is supplied from the lighting device 50 to the control unit 2. As a result, the number of power lines that supply power to the control unit 2 can be reduced. Further, the control unit 2 does not need to be installed in a place where wiring is possible with the external power supply AC. Therefore, the degree of freedom of the installation location can be improved.

In general, the ceiling surface with few obstacles is one of the optimum installation locations for the sensor element and the wireless communication unit. By arranging the sensor element and the wireless communication unit on the ceiling surface, it is possible to improve the detection accuracy of the sensor element and the stability of the wireless communication. Therefore, by providing the control unit 2 on the lighting fixture 1 grounded to the ceiling surface, the performance of the control unit 2 can be improved.

In general, the installation location of the control unit may be limited by the power line for operating the sensor element and the wireless communication unit. In addition, the control unit may increase the size of the lighting fixture and limit the installation location of the lighting fixture. As a result, it may not be possible to provide a control unit in the luminaire. In addition, it may not be possible to install the control unit in a suitable location.

On the other hand, in the present embodiment, non-contact power is supplied from the lighting device 50 to the control unit 2. By applying non-contact power supply between the lighting device 50 and the control unit 2, it is possible to prevent the installation location from being restricted due to wiring restrictions. Further, the lighting fixture 1 can be miniaturized, and the degree of freedom in the installation location of the lighting fixture 1 can be further improved. As a result, the sensor element and the wireless communication unit can be arranged in a suitable place, and the detection accuracy and the stability of the wireless communication can be improved.

Further, by reducing the space for providing the power line, many sensor elements can be mounted on the control unit 2. By increasing the number of sensors, the detection accuracy can be further improved. Further, since the number of power lines is reduced, the lighting fixture 1 can be easily installed and the workability can be improved.

Further, the information detected by the sensor element may be transmitted by the wireless communication unit to an external device such as a tablet terminal. As a result, a large amount of information can be collected accurately and easily on the tablet terminal. For example, by detecting the traffic of people with a motion sensor, it is possible to collect the customer attraction rate or the route information of shoppers. Based on the collected information, for example, a utilization method such as changing the display method of products can be considered.

Further, in the present embodiment, the control power supply V1 which is the power supply of the first control unit IC1 and the MOSFET driver 41 is converted into the coil voltage of the non-contact power supply. As a result, the parts of the lighting device 50 and the parts for non-contact power feeding can be used together. Therefore, the number of parts can be suppressed, resources can be saved, and the lighting fixture 1 can be downsized.

Further, the voltage of the control power supply V1 is 15V, which is equivalent to the voltage generally used for the coil voltage of the non-contact power supply. Therefore, by driving the second switching power supply unit 52 with the control power supply V1, it is not necessary to provide an additional transformer circuit or the like for non-contact power supply. As described above, in the present embodiment, the supply voltage of the non-contact power supply and the voltage of the control power supply V1 are both configured to be 15V. Therefore, it is possible to efficiently perform DC-AC conversion to generate a coil voltage.

In the present embodiment, the control unit 40 is composed of two independent parts, the first control unit IC1 and the second control unit IC10. Not limited to this, the first control unit IC1 and the second control unit IC10 may communicate with each other, or the other may be controlled according to a control signal from one. Further, the first control unit IC1 and the second control unit IC10 may be an integrated control unit 40. In this case, the control unit 40 controls the first switching power supply unit 51 and the second switching power supply unit 52.

Further, the second switching power supply unit 52 converts the voltage supplied from the control power supply V1 into an AC voltage. Not limited to this, the second switching power supply unit 52 may convert the voltage generated in the first switching power supply unit 51 into an AC voltage. The voltage generated in the first switching power supply unit 51 may be, for example, a voltage applied across the capacitor C1.

In the present embodiment, the external power supply AC is a commercial AC power supply, but the present invention is not limited to this. For example, the external power supply AC may be a DC power supply. In this case, the lighting device 50 does not have to include a boost chopper circuit. Further, the external power supply AC may be a power supply obtained by converting a DC voltage obtained by solar power generation or the like into alternating current.

Further, the configuration of the first switching power supply unit 51 is not limited to that shown in the present embodiment. As the first switching power supply unit 51, any circuit that lights the light source 81 by turning the switching element on and off can be adopted. Further, as the second switching power supply unit 52, any circuit that converts the voltage generated in the first switching power supply unit 51 into an AC voltage can be adopted.

These modifications can be appropriately applied to the control unit and the lighting fixture according to the following embodiments. Since the control unit and the lighting fixture according to the following embodiments have much in common with the first embodiment, the differences from the first embodiment will be mainly described.

Embodiment 2.
FIG. 3 is a circuit block diagram of the lighting fixture 201 according to the second embodiment. In FIG. 3, the control unit is omitted. The luminaire 201 includes a lighting device 250. The lighting device 250 is different from the first embodiment in the structures of the first control unit IC2, the second control unit IC11, the second switching power supply unit 252, and the power transmission coil T11.

The second switching power supply unit 252 includes a switching element Q12. The switching element Q12 is, for example, a MOSFET. The drain of the switching element Q12 is connected to one end of the power transmission coil T11 and the negative electrode of the capacitor C11. The source of the switching element Q11 is connected to the ground terminal GND. The gate of the switching element Q12 is connected to the terminal Vg11 of the second control unit IC11. The switching element Q12 is connected between the power transmission coil T11 and the grounding terminal GND.

The other end of the power transmission coil T11 and the positive electrode of the capacitor C11 are connected to the control power supply V1. The power transmission coil T11 and the capacitor C11 are connected in parallel. A series circuit of the resistor R10 and the resistor R11 is connected between the drain and the source of the switching element Q12. The connection point between the resistance R10 and the resistance R11 is connected to the communication terminal IN of the first control unit IC2.

The second control unit IC11 switches the switching element Q12 by the output signal from the terminal Vg11. As a result, a resonance current flows through the power transmission coil T11 and the capacitor C11. That is, the second switching power supply unit 252 converts the voltage supplied from the control power supply V1 into an AC voltage. The power transmission coil T11 generates an AC magnetic field from this AC voltage.

Further, a communication signal from a control unit described later is input to the communication terminal IN. In the present embodiment, the first control unit IC2 and the second control unit IC11 form a control unit 240. The control unit 240 has a communication terminal IN for receiving a communication signal transmitted from the control unit.

FIG. 4 is a circuit block diagram of the control unit 202 according to the second embodiment. The control unit 202 is a power receiving device to which power is supplied from the lighting device 250 by non-contact power supply. In this embodiment, the control unit 202 communicates with the lighting device 250. The control unit 202 includes a power receiving unit Rx201 and an option unit U201.

The power receiving unit Rx201 includes a power receiving coil T210. The positive electrode of the capacitor C202 and the anodes of the diodes D201 and 202 are connected to one end of the power receiving coil T210. The drain of the switching element Q201 is connected to the negative electrode of the capacitor C202. The switching element Q201 is, for example, a MOSFET. The source of the switching element Q201 is connected to the other end of the power receiving coil R210. The gate of the switching element Q201 is connected to the terminal Out of the third control unit IC201. The series circuit of the capacitor C202 and the switching element Q201 is connected in parallel with the power receiving coil T210.

The cathode of the diode D201 is connected to the positive electrode of the capacitor C201. The negative electrode of the capacitor C201 is connected to the other end of the power receiving coil T210. The series circuit of the diode D201 and the capacitor C201 is connected in parallel with the power receiving coil T210. The connection point between the diode D201 and the capacitor C201 is connected to the terminal Vin, which is the input voltage terminal of the third control unit IC201.

The cathode of the diode D202 is connected to the terminal Vsta of the third control unit IC201. A capacitor C203 is connected between the terminal CT of the third control unit IC201 and the grounding terminal GND. The terminal Vss of the third control unit IC201 is connected to the grounding terminal GND.

The third control unit IC201 includes a terminal Vout and a terminal Info. The terminal Vout and the terminal Info are drawn out from the power receiving unit Rx201 and connected to the option unit U201. The option unit U201 is connected to the terminal Vout, the terminal Info, and the grounding terminal GND.

The option unit U201 has a detection unit Sen and a wireless communication unit Com. The detection unit Sen and the wireless communication unit Com are connected to each other. The detection unit Sen includes a sensor element Sen1 and a sensor control unit Sen2. At least one sensor element Sen1 may be included in the detection unit Sen.

The power receiving coil T210 is arranged close to the power transmission coil T11. The power receiving coil T210 generates a voltage according to the AC magnetic field generated by the power transmission coil T11. That is, the power receiving coil T210 is induced by the electromagnetic wave generated in the power transmission coil T11 to generate a voltage. The option unit U201 operates by the voltage generated in the power receiving coil T210.

The diode D201 rectifies the voltage generated by the power receiving coil T210 and charges the capacitor C201. The diode D202 rectifies the voltage generated in the power receiving coil T210 and supplies the starting current to the third control unit IC201.

The third control unit IC201 is activated by inputting a starting current from the terminal Vsta. The third control unit IC201 operates by the electric power supplied to the terminal Vin. The voltage of the terminal Vin is determined by the voltage applied across the capacitor C201. Further, the third control unit IC201 supplies electric power to the option unit U201 from the terminal Vout. The power or current supplied by the third control unit IC 201 to the option unit U201 is determined by the capacity of the capacitor C203.

Next, a method of communicating with the outside of the control unit 202 will be described. The wireless communication unit Com transmits a communication signal including information detected by the sensor element Sen1 to the outside. The transmission destination of the communication signal is the external device 60 or the lighting device 250. For example, when the transmission destination is the lighting device 250, the lighting device 250 may brighten or darken the light source 81 according to the communication signal which is a wireless signal. Alternatively, the lighting device 250 may turn off the light source 81 according to the communication signal. The external device 60 is, for example, a tablet terminal, and may be any wireless communication device.

The wireless communication unit Com receives a wireless signal transmitted from the external device 60. The wireless communication unit Com operates the detection unit Sen according to the received signal received from the external device 60. That is, the detection unit Sen is controlled according to the received signal from the external device 60, and the detection function is switched between valid and invalid. Further, the detection unit Sen may have a plurality or a plurality of types of sensor elements Sen1. In this case, the wireless communication unit Com may switch the sensor element to be enabled according to the received signal from the external device 60.

Further, the wireless communication unit Com receives the received signal from the external device 60 and transmits the communication signal corresponding to the received signal to the outside. For example, when the transmission destination of the communication signal is the lighting device 250, the lighting device 250 may brighten or darken the light source 81 according to the communication signal which is a wireless signal. Alternatively, the lighting device 250 may turn off the light source 81 according to the communication signal. Further, the transmission destination of the communication signal is not limited to the lighting device 250, and may be another wireless communication device. In this case, the wireless communication unit Com plays the role of an access point.

Further, the control unit 202 may transmit a communication signal from the power receiving coil T210 to the power transmission coil T11. This communication method will be described. The third control unit IC201 switches the switching element Q201 from the terminal Out. When the switching element Q201 is turned on, a loop is formed by the power receiving coil T210, the capacitor C202, the drain of the switching element Q201, and the source of the switching element Q201. As a result, the impedance of the power receiving coil T210 is lowered as compared with the state in which the switching element Q201 is turned off.

Since the power receiving coil T210 side has a low impedance, the impedance of the power transmission coil T11 also decreases. As a result, the communication signal is transmitted to the communication terminal IN of the first control unit IC2. In this way, the control unit 202 transmits a communication signal from the power receiving coil T210 to the power transmission coil T11 by lowering the impedance of the power receiving coil T210. That is, the control unit 202 transmits a communication signal from the power receiving coil T210 by changing the magnetic field generated by the power receiving coil T210.

The communication signal transmitted from the power receiving coil T210 is, for example, a signal corresponding to the received signal received from the external device 60 by the wireless communication unit Com. Alternatively, the communication signal transmitted from the power receiving coil T210 may include information detected by the sensor element Sen1. The control unit 202 performs half-duplex communication between the control unit 202 and the lighting device 250 by switching the switching element Q201 connected in parallel to the power receiving coil T210.

FIG. 5 is a flowchart illustrating the operation of the control unit 202 according to the second embodiment. An example of the operation of the control unit 202 when the control unit 202 is a motion sensor will be described with reference to FIG. In this case, the sensor element Sen1 detects the presence or absence of a person. At the start of operation, the switching element Q201 is in the off state. Further, the detection unit Sen is in a stopped state.

First, the external device 60 is operated so that the user activates the detection unit Sen. The external device 60 transmits a wireless signal according to the operation of the user. The wireless communication unit Com receives a received signal which is a wireless signal from the external device 60. Upon receiving the received signal, the wireless communication unit Com activates the detection unit Sen. When the sensor element Sen1 detects a person, the option unit U201 outputs the information detected by the sensor element Sen1 to the terminal Info.

The third control unit IC201 switches the switching element Q201 according to the information input from the terminal Info. As a result, the power receiving coil T210 side has low impedance. Accordingly, the impedance of the power transmission coil T11 also decreases. As a result, a communication signal including the information detected by the sensor element Sen1 is transmitted to the lighting device 250. In this way, the lighting device 250 receives the communication signal transmitted from the power receiving coil T210 by the power transmission coil T11.

The power transmission coil T11 is connected to the IN terminal of the control unit 240. The communication signal received by the power transmission coil T11 is input to the control unit 240. The control unit 240 controls the first switching power supply unit 51 according to the communication signal. That is, the first switching power supply unit 51 is controlled according to the communication signal transmitted by the control unit 202. The lighting device 250 brightens, for example, the light source 81 according to the communication signal.

Here, the communication signal is transmitted by making the on state or the switching state of the switching element Q201 correspond to the state in which a person exists, and the off state of the switching element Q201 corresponding to the state in which a person is absent. .. As an example of this modification, the control unit 202 may transmit a more complicated communication signal from the power receiving coil T210. In this case, the control unit 202 may transmit a communication signal from the power receiving coil T210, for example, in correspondence with the switching cycle or the on-time of the switching element Q201.

In this embodiment, communication between the control unit 202 and the lighting device 250 is performed wirelessly. Therefore, the communication line between the control unit 202 and the lighting device 250 can be reduced. Therefore, the lighting fixture 201 can be miniaturized. In addition, the degree of freedom in the installation location of the lighting fixture 201 can be improved.

As a modification of the present embodiment, the control unit 202 is not limited to the motion sensor, but may be a wired or wireless dimming controller, an illuminance sensor, a sound collecting sensor, or a temperature sensor. For example, when the control unit 202 is an illuminance sensor, the control unit 202 may change the dimming rate according to the ambient brightness. As a result, the space in which the lighting fixture 201 is installed can be kept at a constant brightness.

Further, the information detected by the control unit 202 does not necessarily have to be information related to lighting control. For example, the control unit 202 may be a smoke sensor, an air concentration sensor, or a vital biosensor. The wireless communication unit Com transmits information detected by various sensors to, for example, a tablet terminal. As a result, the transmitted information can be utilized. When the control unit 202 is a smoke sensor, the control unit 202 and the fire alarm may be interlocked with each other. Further, if the control unit 202 is an air concentration sensor, the control unit 202 may be interlocked with the air conditioner. Further, if the control unit 202 is a vital biosensor, it is conceivable to construct a watching system using the control unit 202 or apply it to the livestock industry.

Further, the configuration of the option unit U201 is not limited to that shown in FIG. The option unit U201 may wirelessly detect an external state or a signal from the outside. For example, the option unit U201 may include only one of the detection unit Sen and the wireless communication unit Com.

When the option unit U201 has only the wireless communication unit Com, for example, the wireless communication unit Com receives the dimming rate set by the user from an external device as a reception signal. The control unit 202 transmits a communication signal according to the received dimming rate to the outside from the wireless communication unit Com or the power receiving coil T210.

When the option unit U201 has only the detection unit Sen, for example, the control unit 202 transmits a communication signal corresponding to the information detected by the sensor element Sen1 from the power receiving coil T210 to the lighting device 250.

Embodiment 3.
FIG. 6 is a circuit block diagram of the control unit 302 according to the third embodiment. The control unit 302 includes a power receiving unit Rx301 and an option unit U211. The power receiving unit Rx301 includes a third control unit IC211. The third control unit IC211 includes a terminal Mem_Info. The terminal Mem_Info is pulled out from the power receiving unit Rx301 and connected to the option unit U211. The option unit U211 has a storage unit Mem. The terminal Mem_Info is connected to the storage unit Mem. Further, the storage unit Mem is connected to the detection unit Sen and the wireless communication unit Com. Other structures are the same as those in the second embodiment.

Information about the control unit 302 such as model information is stored in the storage unit Mem. Further, the storage unit Mem may store the information detected by the option unit U211. The information detected by the option unit U211 includes the information detected by the detection unit Sen or the information received by the wireless communication unit Com.

The information stored in the storage unit Mem may be the LED current value or dimming degree that the lighting device 250 sends to the light source 81 based on the information detected by the detection unit Sen. The storage unit Mem may store a voltage value or a power value used for control by the lighting device 250.

The wireless communication unit Com transmits a communication signal including information stored in the storage unit Mem to the outside. Further, the option unit U211 outputs the information stored in the storage unit Mem to the terminal Mem_Info. Information stored in the storage unit Mem is input from the terminal Mem_Info to the third control unit IC211. The third control unit IC211 switches the switching element Q201 and transmits a communication signal including information stored in the storage unit Mem from the power receiving coil T210.

The third control unit IC211 controls its own operation based on either or both of the information input to the terminal Mem_Info and the terminal Info. The third control unit IC211 switches the switching element Q201 and transmits either or both of the information input to the terminal Mem_Info and the terminal Info to the control unit 240 of the lighting device 250.

For example, the operation when the storage unit Mem stores the luminous intensity based on the information detected by the detection unit Sen and the option unit U211 is a motion sensor will be described. It is assumed that the detection unit Sen detects the presence of a person. The storage unit Mem outputs the dimming intensity when there is a person to the terminal Mem_Info according to the information detected by the detection unit Sen. The storage unit Mem may output a signal instructing lighting to the terminal Mem_Info. As a result, the third control unit IC 211 transmits a communication signal for lighting instructions from the power receiving coil T210 to the lighting device 250.

Further, it is assumed that the detection unit Sen detects that there is no person. The storage unit Mem outputs the dimming intensity when there is no person to the terminal Mem_Info according to the information detected by the detection unit Sen. The storage unit Mem may output, for example, a signal instructing the terminal Mem_Info to turn off the light. As a result, the third control unit IC211 transmits a communication signal for turning off the light from the power receiving coil T210 to the lighting device 250.

The control unit 240 turns on or off the light source 81 according to the dimming intensity according to the received communication signal. Not limited to this, the control unit 302 may change the dimming degree depending on the detection frequency of a person.

Further, the control unit 302 may transmit information about the control unit 302 stored in the storage unit Mem to the control unit 240. Accordingly, the control unit 240 may supply electric power suitable for the control unit 302 from the power transmission coil T11.

The communication signal is transmitted from the control unit 302 to the lighting device 250 via the power receiving coil T210 and the power transmission coil T11, or via the wireless communication unit Com. Not limited to this, the communication signal may be transmitted by another signal path. For example, the communication signal may be transmitted from the control unit 302 to the lighting device 250 by wire communication.

Embodiment 4.
FIG. 7 is a perspective view of the lighting fixture 401 according to the fourth embodiment. FIG. 8 is a perspective view showing a state in which the light source unit 401b and the control unit 202 are removed from the fixture main body 401a in the lighting fixture 401 according to the fourth embodiment. FIG. 9 is a perspective view showing a state in which the control unit 202 is removed from the light source unit 401b in the lighting fixture 401 according to the fourth embodiment.

The lighting fixture 401 includes a fixture main body 401a, a light source unit 401b, and a control unit 202. The light source unit 401b is attached to the instrument main body 401a. The light source unit 401b has an LED light source unit 80 and a lighting device 250 according to the second embodiment. The control unit 202 is attached to the side surface of the light source unit 401b. The control unit 202 is attached to the longitudinal end of the light source unit 401b.

The instrument main body 401a has a mounting portion to be mounted on a mounted portion such as a ceiling, and an engaging portion 71 for mounting the light source unit 401b. The engaging portion 71 is a hook spring. The engaging portions 71 are provided on both sides of the instrument main body 401a in the longitudinal direction.

The light source unit 401b has a frame. The frame is elongated and has a U-shaped or U-shaped cross section. A receiving portion 72 is attached to the frame. The receiving portion 72 engages with the engaging portion 71. A light source module is attached to the frame. The light source module includes an LED light source unit 80.

Further, a long translucent cover 73 is attached to the frame. The translucent cover 73 covers the light source module. End covers 74 are attached to both ends of the translucent cover 73 in the longitudinal direction. Further, a lighting device 250 that supplies electric power to the light source module is attached to the frame. A power transmission coil T11 is arranged inside the side of the two end covers 74 adjacent to the control unit 202.

The control unit 202 has a case 75. The case 75 is an outer enclosure for accommodating the power receiving coil T210 and the option unit U211. The case 75 engages with the light source unit 401b. The case 75 is attached to the side surface of the light source unit 401b. Of the case 75, at least a portion of the light source unit 401b that comes into contact with the feeding portion to the control unit 202 is formed of a non-conductor. The non-conductor is, for example, a resin. A power receiving coil T210 is attached to the inside of a portion of the case 75 made of a non-conductor.

In the present embodiment, the power transmission coil T11 and the power reception coil T210 are provided adjacent to each other via a non-conductor. Since the component interposed between the power transmission coil T11 and the power reception coil T210 is a non-conductive member, the influence of heating by the electromagnetic wave generated by the power transmission coil T11 can be suppressed. Here, the components interposed between the power transmission coil T11 and the power reception coil T210 are, for example, the end cover 74 and the case 75.

Further, since the component interposed between the power transmission coil T11 and the power reception coil T210 is formed of a non-conductor, it is possible to reduce the power loss in the non-contact power supply to the power reception coil T210. Further, the signal transmitted from the power receiving coil T210 to the power transmission coil T11 is less likely to be cut off by a component interposed between the power transmission coil T11 and the power transmission coil T210. Therefore, the signal can be easily transmitted, and the communication performance between the lighting device 250 and the control unit 202 can be improved.

In this embodiment, the light source unit 401b includes a lighting device 250. Not limited to this, the light source unit 401b may include a lighting device 50. Further, the lighting fixture 401 is not limited to the control unit 202, and may include the control unit 2 or the control unit 302.

Further, the luminaire 401 may include a dummy unit having only the case 75 instead of the control unit 202. When the dimming control by the control unit 202 is not required, a dummy unit is attached to the luminaire 401. This makes it possible to change the presence or absence of the dimming control function by the control unit without changing the appearance of the lighting fixture 401.

Embodiment 5.
FIG. 10 is a circuit block diagram of the control unit 502 according to the fifth embodiment. The structure of the option unit U501 of the control unit 502 is different from that of the second embodiment. The option unit U501 does not have a wireless communication unit Com. The terminal Sen_Info of the third control unit IC201 is pulled out from the power receiving unit Rx201 and connected to the detection unit Sen of the option unit U501. Other configurations are the same as those in the second embodiment.

Information detected by the detection unit Sen is input to the third control unit IC201 from the terminal Sen_Info. The third control unit IC201 controls its own operation based on the information input to the terminal Sen_Info. The third control unit IC201 switches the switching element Q201 and lowers the impedance of the power receiving coil T210. As a result, the third control unit IC201 transmits the information input to the terminal Sen_Info to the control unit 240 of the lighting device 250. From the above, the control unit 502 transmits a communication signal corresponding to the information detected by the sensor element Sen1 from the power receiving coil T210 to the lighting device 250.

In the present embodiment, the information included in the communication signal is, for example, the information detected by the detection unit Sen. The control unit 502 performs half-duplex communication between the control unit 502 and the lighting device 250 by switching the switching element Q201 connected in parallel to the power receiving coil T210.

Embodiment 6.
FIG. 11 is a circuit block diagram of the control unit 602 according to the sixth embodiment. The control unit 602 includes a power receiving unit Rx301 and an option unit U511. The option unit U511 does not have a wireless communication unit Com. The terminal Sen_Info of the third control unit IC211 is pulled out from the power receiving unit Rx301 and connected to the detection unit Sen of the option unit U511. Other configurations are the same as those in the third embodiment.

The option unit U511 outputs the information stored in the storage unit Mem to the terminal Mem_Info. Information stored in the storage unit Mem is input from the terminal Mem_Info to the third control unit IC211.

The third control unit IC211 controls its own operation based on either or both of the information input to the terminal Mem_Info and the terminal Sen_Info. The third control unit IC211 switches the switching element Q201, and transmits a communication signal including either or both of the information input to the terminal Mem_Info and the terminal Info from the power receiving coil T210. From the above, the control unit 602 transmits a communication signal corresponding to the information detected by the sensor element Sen1 or the information stored in the storage unit Mem from the power receiving coil T210 to the lighting device 250.

The technical features described in each embodiment may be used in combination as appropriate.

1,201,401 Lighting equipment, 1a, 401a Equipment body, 1b, 401b Light source unit, 2,202, 302, 502, 602 Control unit, 40, 240 Control unit, 51 First switching power supply unit, 52 Second switching power supply Unit, 60 external equipment, 75 cases, 81 light source, AC external power supply, Q1, Q2, Q10, Q11, Q12, Q201 switching element, T10, T11 transmission coil, T210 power receiving coil, V1 control power supply, IC1, IC2 first control Unit, IC10, IC11 2nd control unit, IN communication terminal, Sen detection unit, Sen1 sensor element, Com wireless communication unit, Mem storage unit, U201, U211, U501, U511 option unit

Claims (14)

Lighting device and
Light source and
A control unit including a power receiving coil that generates a voltage according to an AC magnetic field, and an optional unit that operates by the voltage generated in the power receiving coil and wirelessly detects an external state or a signal from the outside .
Equipped with
The lighting device is
A first switching power supply unit that lights the light source by turning the switching element on and off,
The second switching power supply unit that generates AC voltage,
A power transmission coil that generates the AC magnetic field from the AC voltage,
A lighting fixture characterized by being equipped with. The luminaire according to claim 1 , wherein the control unit communicates with the lighting device. The luminaire according to claim 1 or 2 , wherein the lighting device receives a communication signal transmitted from the power receiving coil by the power transmission coil. The lighting fixture according to any one of claims 1 to 3 , wherein the first switching power supply unit is controlled according to a communication signal transmitted by the control unit. The luminaire according to any one of claims 1 to 4 , wherein the power transmission coil and the power reception coil are provided adjacent to each other via a non-conductor. It has a light source unit having the light source and the lighting device.
The control unit further includes an enclosure for accommodating the power receiving coil and the option unit.
The luminaire according to any one of claims 1 to 5 , wherein the enclosure is attached to a side surface of the light source unit. The option unit is
A detection unit having a sensor element that detects an external state,
A wireless communication unit that wirelessly communicates with external devices,
Equipped with
The lighting device according to any one of claims 1 to 6, wherein the wireless communication unit transmits a communication signal including information detected by the sensor element to the outside. The option unit includes a detection unit having a sensor element for detecting an external state.
The luminaire according to any one of claims 1 to 6, wherein the control unit transmits a communication signal including information detected by the sensor element from the power receiving coil. The option unit includes a wireless communication unit that wirelessly communicates with an external device.
The lighting equipment according to any one of claims 1 to 6, wherein the wireless communication unit transmits a communication signal corresponding to a received signal received from the external device to the outside. The option unit includes a wireless communication unit that wirelessly communicates with an external device.
The lighting device according to any one of claims 1 to 6, wherein the control unit transmits a communication signal corresponding to a received signal received from the external device from the power receiving coil. .. The option unit is
A storage unit that stores information detected by the option unit, and
A wireless communication unit that wirelessly communicates with external devices,
Equipped with
The lighting device according to any one of claims 1 to 6, wherein the wireless communication unit transmits a communication signal including the information to the outside. The option unit includes a storage unit that stores information detected by the option unit.
The luminaire according to any one of claims 1 to 6, wherein the control unit transmits a communication signal including the information from the power receiving coil. The luminaire according to any one of claims 1 to 12, wherein the control unit transmits a communication signal from the power receiving coil by changing a magnetic field generated by the power receiving coil. The option unit is
A detection unit having a sensor element that detects an external state,
A wireless communication unit that wirelessly communicates with external devices,
Equipped with
The lighting fixture according to any one of claims 1 to 6, wherein the wireless communication unit operates the detection unit in response to a received signal received from the external device.

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