JP5954656B2 - Lighting device and lighting apparatus using the same - Google Patents

Description

  The present invention relates to a lighting device and a lighting fixture using the lighting device.

  In recent years, solid-state light-emitting elements (for example, light-emitting diodes) have been used as light sources for lighting fixtures.

  Conventionally, a system including a light module having a plurality of light emitting diodes (hereinafter referred to as LEDs) and a control device for controlling the light module has been proposed (Patent Document 1). Patent Document 1 describes that the above-described system includes a plurality of light modules.

  Patent Document 1 describes that a light module includes an LED system including a plurality of LEDs and a processing device that controls the LED system. Patent Document 1 describes that the control device controls the processing device with control data in a format according to the DMX-512 protocol.

  Conventionally, lighting devices having cooling means such as fans have been proposed (for example, Patent Documents 2 and 3).

  Patent Document 2 discloses an LED lighting device having a cooling means such as a fan and a lighting device using the LED lighting device. Patent Document 2 describes that this lighting device can be applied to a lighting fixture used indoors or outdoors.

  As shown in FIG. 5, the LED lighting device disclosed in Patent Document 2 includes a DC power source 72 and a lighting circuit 73 that receives the output of the DC power source 72 and lights a plurality of LEDs 74.

  The lighting circuit 73 includes a series circuit 78 to which a plurality of LEDs 74 are connected, and a cooling means driving unit 76 that drives a fan motor 75 that is a part of the cooling means. Patent Document 2 describes that the cooling means includes a fan motor 75 and a fan (not shown) attached to the fan motor 75.

  Further, Patent Document 2 describes that a temperature detecting unit 77 including a temperature detecting element such as a thermistor is connected to the cooling unit driving unit 76. Patent Document 2 describes that the temperature detection unit 77 detects the temperature of the LED 74. Patent Document 2 describes that the cooling means driving unit 76 drives the fan motor 75 when the temperature detecting means 77 detects an increase in temperature of the LED 74 beyond a certain level.

  Patent Document 3 discloses an illumination device having a cooling fan and a display device using the illumination device.

  As shown in FIG. 6, the display device disclosed in Patent Document 3 includes a light emitting unit 81 having an LED 80, a light guide 82, a liquid crystal display panel 83, a temperature sensor 84, a memory unit 85, and a light emitting unit 81. And a cooling fan 89 for cooling the air. Patent Document 3 describes that the light emitting unit 81 includes a plurality of LEDs 80.

  In addition, the display device described above includes the current adjustment unit 87 that adjusts the drive current of the LED 80, the voltage adjustment unit 88 that adjusts the drive voltage of the LED 80, and the light emission amount of the LED 80 via the current adjustment unit 87 and the voltage adjustment unit 88. And a light amount control unit 86 for controlling the above. Patent Document 3 describes that the temperature sensor 84 is a temperature detection unit that detects the junction temperature of the LED 80 or the ambient temperature of the LED 80.

  The light amount control unit 86 includes an analog / digital conversion unit 90 (hereinafter referred to as ADC 90), a matrix comparison unit 91, a current control signal for adjusting the drive current of the LED 80, and a voltage for adjusting the drive voltage of the LED 80. And a control signal generation unit 92 that generates a control signal.

  The ADC 90 converts the analog temperature signal from the temperature sensor 84 into a digital temperature signal and sends it to the matrix comparison unit 91.

  The matrix comparison unit 91 compares the digital temperature signal from the ADC 90 with the matrix data read from the memory unit 85 to determine the authorized current IM that can be passed through the LED 80 and transmits the result to the control signal generation unit 92. .

  Further, in Patent Document 3, the control signal generation unit 92 cools the cooling fan 89 according to the difference between the authorization current IM from the matrix comparison unit 91 and the requested drive current IR from a host (not shown). It describes that the capacity (the number of rotations of the fan) is controlled.

JP 2008-34385 A JP 2011-150936 A JP 2006-318733 A

  By the way, in the system disclosed in Patent Document 1, the control device can control a plurality of light modules by remote control by controlling each processing device with control data in a format according to the DMX-512 protocol. Become.

  However, in each light module in the system disclosed in Patent Document 1, there is a concern that the temperature of the LED will increase as the output of the LED increases.

  Further, in the LED lighting device disclosed in Patent Document 2, when the temperature detection unit 77 detects a temperature rise of the LED 74 above a certain level, the cooling unit drive unit 76 drives the fan motor 75, so the temperature rise of the LED 74 is increased. Can be suppressed.

  However, in the LED lighting device described above, when the LED 74 changes from the lighting state to the extinguishing state with power supplied from the commercial power supply, the temperature rise of the LED 74 does not stop immediately, and the cooling means driving unit 76 drives the fan motor 75. There is a possibility to continue. Therefore, in the LED lighting device described above, there is a concern about power consumption when the LED 74 is turned off in a state where power is supplied from a commercial power source.

  Further, in the display device disclosed in Patent Document 3, the control signal generation unit 92 determines the difference between the authorization current IM from the matrix comparison unit 91 and the requested drive current IR from a host (not shown). Since the cooling capacity of the cooling fan 89 is controlled, the temperature rise of the LED 80 can be suppressed.

  However, in the above-described display device, it is difficult to stop the cooling capacity of the cooling fan 89 even when the LED 80 changes from the on state to the off state with power supplied from the commercial power source. Therefore, there is a concern about power consumption when the LED 80 is turned off.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide a lighting device capable of reducing power consumption in a light-off state of a light source unit while being supplied with power from a commercial power source, and a lighting fixture using the same. There is to do.

The lighting device of the present invention includes an AC-DC converter that converts an AC voltage from a commercial power source into a DC voltage, and a DC-DC converter that converts the DC voltage converted by the AC-DC converter into a predetermined DC voltage. A cooling unit that cools the light source unit connected to the output side of the DC-DC conversion unit, and a control unit that controls the AC-DC conversion unit or the DC-DC conversion unit. , the are electrically connected to the output side of the AC-DC converter unit, the front Symbol controller, when the light source unit in a state of being powered from the commercial power source is turned off, slow or stop the cooling function of the cooling unit It is characterized by doing.

  In this lighting device, it is preferable that the control unit suppresses or stops the cooling function of the cooling unit when the light output level of the light source unit is equal to or less than a specified value smaller than 100%.

  The lighting device includes a power supply unit that supplies a driving voltage for driving the cooling unit to the cooling unit, and the control unit turns off the power source when the light source unit is turned off with power supplied from the commercial power supply. It is preferable to stop the power supply from the section to the cooling section.

  In this lighting device, it is preferable that the power supply unit generates the drive voltage from the predetermined DC voltage converted by the DC-DC conversion unit.

  In this lighting device, the control unit outputs a drive signal for driving the cooling unit to the cooling unit, and the control unit turns off the light source unit while being powered from the commercial power source. It is preferable to stop the output of the drive signal.

  The lighting fixture of this invention is equipped with the said light source part which has a solid light emitting element, and the said lighting device, It is characterized by the above-mentioned.

  In this lighting fixture, the light source unit is preferably formed by connecting a plurality of the solid light emitting elements in series and parallel.

  In the lighting device of the present invention, it is possible to reduce power consumption when the light source unit is turned off while being supplied with power from a commercial power source.

  In the lighting fixture of this invention, it becomes possible to reduce the power consumption in the light extinction state of a light source part in the state electrically fed from the commercial power source.

It is a schematic block diagram which shows the usage example of the lighting device of embodiment. It is another schematic block diagram which shows the usage example of a lighting device same as the above. It is a circuit diagram which shows the structure of a lighting device same as the above. It is a schematic block diagram of the lighting fixture of embodiment. It is a schematic block diagram of the LED lighting device of a prior art example. It is a schematic block diagram of the display apparatus of a prior art example.

  Hereinafter, the lighting device of the present embodiment will be described with reference to FIGS.

  The lighting device 10 of the present embodiment is for lighting a light source unit 11 having a solid light emitting element 13 (see FIGS. 2 and 3), for example. In addition, in this embodiment, after demonstrating briefly the illumination system provided with the some lighting device 10 and the control apparatus 30 which controls these some lighting devices 10, the above-mentioned lighting device 10 is demonstrated.

  The control device 30 includes a data generation device 31 that generates control data for controlling each lighting device 10 and a network circuit 32 that transmits the control data from the data generation device 31 to each lighting device 10. Yes. In the lighting system described above, a transmission path 33 for transmitting the control data is provided between the plurality of lighting devices 10 and the control device 30. As the transmission path 33, for example, a medium such as a communication cable can be used. The data generator 31 is provided with a transmitter (not shown) that transmits the control data to the network circuit 32.

  As the data generation device 31, for example, a sensor device that detects ambient illuminance or the presence or absence of a person can be used. In addition to the sensor device, for example, a signal generator that generates a protocol signal for controlling each lighting device 10 can be used as the data generator 31. As the protocol signal, for example, a DMX (Digital Multiplex) signal, a DALI (Digital Addressable Lighting Interface) signal, or the like can be employed.

  In addition to the sensor device and the signal generation device, for example, a remote controller (hereinafter referred to as a remote control) that can transmit a remote control signal using a medium such as infrared rays or radio waves can be used as the data generation device 31. The remote control signal includes the control data. In the above-described lighting system, when a remote controller is used as the data generator 31, the network circuit 32 and the transmission path 33 may not be provided.

  As shown in FIG. 3, the light source unit 11 includes a plurality (28 in the illustrated example) of solid-state light emitting elements 13. In the present embodiment, for example, a light emitting diode (hereinafter referred to as LED) is employed as the solid light emitting element 13. In FIG. 2, five of the 28 solid light emitting elements 13 are visible.

  The 28 solid light emitting elements 13 emit white light, seven red LEDs 13a that emit red light, seven green LEDs 13b that emit green light, seven blue LEDs 13c that emit blue light, and so on. 7 white LEDs 13d.

  Further, the light source unit 11 has a connection relationship of 28 solid state light emitting elements 13 that is a combination of a series connection and a parallel connection. Specifically, the light source unit 11 includes a series circuit of seven red LEDs 13a, a series circuit of seven green LEDs 13b, a series circuit of seven blue LEDs 13c, and a series circuit of seven white LEDs 13d. These four series circuits are connected in parallel.

  The lighting device 10 of the present embodiment converts an AC voltage from a commercial power source AC into a DC voltage, and converts the DC voltage converted by the AC-DC converter 1 into a predetermined DC voltage. And a DC-DC converter 2. The lighting device 10 includes a cooling unit 3 that cools the light source unit 11 connected to the output side of the DC-DC conversion unit 2, and a control unit that controls the DC-DC conversion unit 2, the light source unit 11, and the cooling unit 3. 4 is provided. Furthermore, the lighting device 10 includes a data processing unit 5 that performs processing for instructing the operation of the control unit 4 based on the control data from the control device 30.

  Hereinafter, each component of the lighting device 10 will be described in detail with reference to FIG.

  As the AC-DC converter 1, for example, a full-wave rectifier 6 that full-wave rectifies an AC voltage, and a smoothing capacitor C <b> 1 that smoothes a voltage that has been full-wave rectified by the full-wave rectifier 6 and outputs a DC voltage. And can be used.

  As the full-wave rectifier 6, for example, a diode bridge constituted by four diodes D1 to D4 can be employed.

  A smoothing capacitor C <b> 1 is connected between a pair of output terminals of the full-wave rectifier 6. More specifically, a connection point P1 between the cathode side of the diode D1 and the cathode side of the diode D3 is connected to the high potential side of the smoothing capacitor C1. The connection point P2 between the anode side of the diode D2 and the anode side of the diode D4 is connected to the low potential side of the smoothing capacitor C1.

  A filter unit 7 for removing noise is connected to a pair of input terminals of the full-wave rectifier 6. In other words, the above-described filter unit 7 is connected to a pair of input ends of the AC-DC conversion unit 1. 1 and 2, the filter unit 7 is not shown.

  The filter unit 7 includes a capacitor C2 and a common mode filter including two inductors L1 and L2.

  One end of the inductor L1 is connected to the high potential side of the capacitor C2. The other end of the inductor L1 is connected to a connection point P3 between the anode side of the diode D3 and the cathode side of the diode D4 in the full-wave rectifier 6. One end of the inductor L2 is connected to the low potential side of the capacitor C2. The other end of the inductor L2 is connected to a connection point P4 between the anode side of the diode D1 and the cathode side of the diode D2 in the full-wave rectifier 6.

  A commercial power supply AC is connected between the pair of input ends of the filter unit 7.

  A switch SW such as a wall switch is provided on a power supply path between one input end of the pair of input ends of the filter unit 7 and the commercial power supply AC. In other words, the above-described switch SW is provided in the power supply path between one input end of the pair of input ends of the lighting device 10 and the commercial power supply AC.

  In addition, a fuse FS that melts when an overcurrent flows is provided in the power supply path between the other input end of the pair of input ends of the filter unit 7 and the commercial power supply AC. In other words, the above-described fuse FS is provided in the power supply path between the other input end of the pair of input ends of the lighting device 10 and the commercial power supply AC. 1 and 2, the fuse FS is not shown.

  Here, in the lighting device 10 of the present embodiment, the full-wave rectifier 6 and the smoothing capacitor C1 are used as the AC-DC converter 1, but the present invention is not limited to this. For example, the input from the commercial power supply AC A step-up chopper type AC-DC converter that can improve the power factor of the voltage and the waveform distortion of the input current may be used. In this case, it is desirable that the control unit 4 controls the AC-DC conversion unit 1.

  The DC-DC converter 2 can be configured by a flyback converter, for example. In the present embodiment, the DC-DC converter 2 is a switching circuit composed of three resistors R1 to R3, two capacitors C3 and C4, two diodes D5 and D6, a transformer T1, and a power MOSFET, for example. It has the element Q1. The transformer T1 is provided with a primary winding N1, a secondary winding N2, a tertiary winding N3, and a quaternary winding N4.

  A parallel circuit of a resistor R1 and a capacitor C3 and a series circuit of a diode D5 are connected between both ends of the primary winding N1 of the transformer T1. In the present embodiment, the cathode side of the diode D5 is connected to one end of the primary winding N1 of the transformer T1 via a parallel circuit of a resistor R1 and a capacitor C3. The anode side of the diode D5 is connected to the other end of the primary winding N1 of the transformer T1.

  A connection point between the anode side of the diode D5 and the other end of the primary winding N1 of the transformer T1 is connected to the drain terminal of the switching element Q1. A gate terminal of the switching element Q1 is connected to the control unit 4 via a resistor R2. The source terminal of the switching element Q1 is connected to the low potential side of the smoothing capacitor C1 via the resistor R3.

  One end of the primary winding N1 of the transformer T1 is connected to the high potential side of the smoothing capacitor C1.

  A series circuit of a diode D6 and a capacitor C4 is connected between both ends of the secondary winding N2 of the transformer T1. In the lighting device 10 of the present embodiment, the voltage across the capacitor C4 (the output voltage of the DC-DC conversion unit 2) is applied to the light source unit 11. In other words, the light source unit 11 can be turned on by the output voltage of the DC-DC conversion unit 2.

  Here, in the lighting device 10 of the present embodiment, the DC-DC converter 2 is configured by a flyback converter, but is not limited thereto, and may be configured by, for example, a buck converter.

  As the cooling unit 3, for example, an air cooling type cooling device (for example, an axial fan) can be used. In the present embodiment, the cooling unit 3 is capable of rotating clockwise or counterclockwise around a rotating shaft 8b to which a plurality of blades 8a are attached, and a drive motor 9 that drives the rotating unit 8; have. In the present embodiment, a DC motor is employed as the drive motor 9. However, the present invention is not limited thereto, and for example, a pulse motor may be employed. In this case, it is possible to adjust the rotation speed of the rotating unit 8 and to suppress the cooling function of the cooling unit 3.

  Here, in the lighting device 10 of the present embodiment, an air-cooling type cooling device is used as the cooling unit 3, but not limited thereto, for example, a water-cooling type cooling device that circulates water by a pump, a Peltier element, or the like You may use the cooling device of the type using.

  The control unit 4 includes a first control unit 4 a that controls the DC-DC conversion unit 2, a second control unit 4 b that controls the light source unit 11, and a third control unit 4 c that controls the cooling unit 3. Have.

  The first control unit 4a is configured to switch eleven resistors R4 to R14, four capacitors C5 to C8, an npn transistor Tr1, a comparator CP1, a photocoupler PC1, and a DC-DC conversion unit 2. And a control IC 16 for controlling on / off of the element Q1. In the present embodiment, an IC manufactured by Infineon Co., Ltd. (product number ICE2QS02G) is employed as the control IC 16, but this IC is not particularly limited. In the present embodiment, the above-described control IC 16 is used to control on / off of the switching element Q1. However, the present invention is not limited to this. For example, the first micro-chip on which an appropriate first program is mounted. A computer or the like may be used.

  A series circuit of a resistor R11 and a resistor R12 is connected between both ends of the capacitor C4 of the DC-DC converter 2. A connection point P5 between the resistor R11 and the resistor R12 is connected to an inverting input terminal of the comparator CP1.

  The non-inverting input terminal of the comparator CP1 is connected to a connection point P6 between the resistors R13 and R14. The side of the resistor R14 opposite to the connection point P6 with the resistor R13 is connected to the side of the resistor R12 opposite to the connection point P5 with the resistor R11.

  The output terminal of the comparator CP1 is connected to the base terminal of the transistor Tr1 through the resistor R8. The output terminal of the comparator CP1 is connected to the inverting input terminal of the comparator CP1 through a parallel circuit of a resistor R10 and a capacitor C8.

  The base terminal of the transistor Tr1 is connected to the opposite side to the connection point P5 side of the resistor R12 with the resistor R11 via the resistor R9. The emitter terminal of the transistor Tr1 is connected to the base terminal of the transistor Tr1 via the resistor R9. The emitter terminal of the transistor Tr1 is connected to the low potential side of the capacitor C4.

  The collector terminal of the transistor Tr1 is connected to the side opposite to the connection point P6 side of the resistor R13 with the resistor R14 via the light emitting diode PD1 of the photocoupler PC1 and the resistor R7. The side of the resistor R13 opposite to the connection point P6 side with the resistor R14 is connected to the data processing unit 5. In the present embodiment, the anode side of the light emitting diode PD1 is connected to the resistor R7, and the cathode side of the light emitting diode PD1 is connected to the collector terminal of the transistor Tr1.

  The emitter terminal of the phototransistor PT1 of the photocoupler PC1 is connected to the fifth pin of the control IC 16 via the resistor R5. The emitter terminal of the phototransistor PT1 is connected to the low potential side of the capacitor C7. The high potential side of the capacitor C7 is connected to the fourth pin of the control IC 16. The high potential side of the capacitor C7 is connected to a connection point P7 between the source terminal of the switching element Q1 and the resistor R3 in the DC-DC converter 2 via the resistor R6.

  The collector terminal of the phototransistor PT1 of the photocoupler PC1 is connected to the high potential side of the capacitor C6. The high potential side of the capacitor C6 is connected to the third pin of the control IC 16. The low potential side of the capacitor C6 is connected to the low potential side of the capacitor C7. The low potential side of the capacitor C6 is connected to the first pin of the control IC 16 via the resistor R4. A capacitor C5 is connected in parallel to the resistor R4. In the present embodiment, the high potential side of the capacitor C5 is connected to the first pin side of the control IC 16, and the low potential side of the capacitor C5 is connected to the low potential side of the smoothing capacitor C1 in the AC-DC converter 1. .

  The 6th pin of the control IC 16 is connected to the gate terminal of the switching element Q1 via the resistor R2. The eighth pin of the control IC 16 is connected to the low potential side of the smoothing capacitor C1. The fifth pin of the control IC 16 is connected to the high potential side of the smoothing capacitor C1 through a series circuit of a resistor R23 and a resistor R24.

  The second pin of the control IC 16 is connected to one end of the tertiary winding N3 of the transformer T1 in the DC-DC converter 2 via the resistor R21. The other end of the tertiary winding N3 of the transformer T1 is connected to the low potential side of the smoothing capacitor C1. A connection point P8 between one end of the tertiary winding N3 of the transformer T1 and the resistor R21 is connected to the seventh pin of the control IC 16 via the resistor R22 and the diode D7. In the present embodiment, the anode side of the diode D7 is connected to the resistor R22, and the cathode side of the diode D7 is connected to the 7th pin of the control IC 16.

  The second control unit 4b has four resistors R15 to R18 and four switching elements Q2 to Q5. In the present embodiment, power MOSFETs are employed as the switching elements Q2 to Q5, but this is not particularly limited.

  The drain terminal of the switching element Q2 is connected to one end of a series circuit of seven red LEDs 13a in the light source unit 11. The other end of the series circuit of the seven red LEDs 13a is connected to the high potential side of the capacitor C4 of the DC-DC converter 2. The source terminal of the switching element Q2 is connected to the low potential side of the capacitor C4. The gate terminal of the switching element Q2 is connected to the data processing unit 5 via a resistor R15.

  The drain terminal of the switching element Q3 is connected to one end of a series circuit of seven green LEDs 13b in the light source unit 11. The other end of the series circuit of the seven green LEDs 13b is connected to the other end of the series circuit of the seven red LEDs 13a. The source terminal of the switching element Q3 is connected to the source terminal of the switching element Q2. The gate terminal of the switching element Q3 is connected to the data processing unit 5 via a resistor R16.

  The drain terminal of the switching element Q4 is connected to one end of a series circuit of seven blue LEDs 13c in the light source unit 11. The other end of the series circuit of the seven blue LEDs 13c is connected to the other end of the series circuit of the seven green LEDs 13b. The source terminal of the switching element Q4 is connected to the source terminal of the switching element Q3. The gate terminal of the switching element Q4 is connected to the data processing unit 5 via a resistor R17.

  The drain terminal of the switching element Q5 is connected to one end of a series circuit of seven white LEDs 13d in the light source unit 11. The other end of the series circuit of the seven white LEDs 13d is connected to the other end of the series circuit of the seven blue LEDs 13c. The source terminal of the switching element Q5 is connected to the source terminal of the switching element Q4. A gate terminal of the switching element Q5 is connected to the data processing unit 5 via a resistor R18.

  The third control unit 4c includes two resistors R19 and R20, a pnp transistor Tr2, and an npn transistor Tr3.

  The collector terminal of the transistor Tr2 is connected to one input terminal 9a of the pair of input terminals 9a and 9b of the drive motor 9. The base terminal of the transistor Tr2 is connected to the collector terminal of the transistor Tr3 via the resistor R19.

  The base terminal of the transistor Tr3 is connected to the data processing unit 5 via the resistor R20. The emitter terminal of the transistor Tr3 is connected to the other input terminal 9b of the pair of input terminals 9a and 9b of the drive motor 9. The emitter terminal of the transistor Tr3 is connected to the low potential side of the capacitor C4 of the DC-DC converter 2.

  The emitter terminal of the transistor Tr2 is connected to one end of the quaternary winding N4 of the transformer T1 in the DC-DC converter 2 via the diode D8. In this embodiment, the anode side of the diode D8 is connected to one end of the quaternary winding N4 of the transformer T1, and the cathode side of the diode D8 is connected to the emitter terminal of the transistor Tr2. The other end of the quaternary winding N4 of the transformer T1 is connected to the low potential side of the capacitor C4.

  By the way, the lighting device 10 of the present embodiment has a plurality (three in the present embodiment) of power supply units 17 that generate drive voltages for driving each of the control unit 4, the cooling unit 3, and the data processing unit 5. ~ 19. 1 and 2, the two power supply units 18 and 19 are illustrated as one power supply unit. Hereinafter, in the present embodiment, for convenience of explanation, the three power supply units 17 to 19 may be referred to as a first power supply unit 17, a second power supply unit 18, and a third power supply unit 19.

  The lighting device 10 generates a first power supply unit 17 that generates a first drive voltage for driving the control unit 4 and supplies the first drive voltage to the control unit 4, and a second drive voltage for driving the cooling unit 3. And a second power supply unit 18 that is generated and supplied to the cooling unit 3. Further, the lighting device 10 includes a third power supply unit 19 that generates a third driving voltage for driving the data processing unit 5 and supplies the third driving voltage to the data processing unit 5.

  The first power supply unit 17 generates a first drive voltage (5 V in the present embodiment) from the DC voltage converted by the AC-DC conversion unit 1. Further, the second power supply unit 18 generates a second drive voltage (12 V in the present embodiment) from the predetermined DC voltage converted by the DC-DC conversion unit 2. The third power supply unit 19 generates a third drive voltage (5 V in the present embodiment) from the second drive voltage generated by the second power supply unit 18. In the present embodiment, each of the first drive voltage and the third drive voltage is set to 5V, and the second drive voltage is set to 12V. However, these numerical values are merely examples, and are not particularly limited.

  Here, in the lighting device 10 of the present embodiment, the first power supply unit 17, the second power supply unit 18, and the third power supply unit 19 are provided. The first power supply unit 17 and the second power supply unit 18 may be provided, and the first drive voltage generated by the first power supply unit 17 may be supplied to the data processing unit 5. In other words, in the present embodiment, the number of the power supply units 17 to 19 is three, but may be two, for example.

  In addition, the first power supply unit 17 includes a capacitor C9. The high potential side of the capacitor C9 is connected to the high potential side of the smoothing capacitor C1 through a series circuit of a resistor R25 and a resistor R26. A connection point P9 between the high potential side of the capacitor C9 and the series circuit of the resistors R25 and R26 is connected to the 7th pin of the control IC 16. The low potential side of the capacitor C9 is connected to the low potential side of the smoothing capacitor C1.

  In the lighting device 10 of the present embodiment, when the switch SW is turned on and power is supplied from the commercial power supply AC, the DC voltage converted by the AC-DC converter 1 is connected to the capacitor C9 via the resistor R25 and the resistor R26. Is charged. In addition, when the capacitor C9 is charged, the lighting device 10 supplies the voltage across the capacitor C9 (the first drive voltage generated by the first power supply unit 17) to the seventh pin of the control IC 16, The control IC 16 is driven. In the lighting device 10, when the control IC 16 controls on / off of the switching element Q <b> 1 of the DC-DC converter 2, the voltage generated in the tertiary winding N <b> 3 of the transformer T <b> 1 in the DC-DC converter 2 is changed to the resistor R <b> 22. Then, it is rectified and smoothed by the diode D7 and the capacitor C9 and supplied to the 7th pin of the control IC 16.

  The second power supply unit 18 includes a quaternary winding N4 of the transformer T1 of the DC-DC conversion unit 2, a diode D8, and a capacitor C10.

  The anode side of the diode D8 is connected to one end of the quaternary winding N4 of the transformer T1. The cathode side of the diode D8 is connected to the emitter terminal of the transistor Tr2 in the third control unit 4c. The other end of the quaternary winding N4 of the transformer T1 is connected to the low potential side of the capacitor C4 of the DC-DC converter 2.

  The high potential side of the capacitor C10 is connected to a connection point P10 between the diode D8 and the emitter terminal of the transistor Tr2. The low potential side of the capacitor C10 is connected to the low potential side of the capacitor C4.

  The third power supply unit 19 includes a constant voltage circuit 20 that generates a third drive voltage from the second drive voltage generated by the second power supply unit 18 and a capacitor C11. In the present embodiment, for example, a three-terminal regulator can be used as the constant voltage circuit 20.

  The input terminal of the constant voltage circuit 20 is connected to the high potential side of the capacitor C10 of the second power supply unit 18. The ground terminal of the constant voltage circuit 20 is connected to the low potential side of the capacitor C10. The ground terminal of the constant voltage circuit 20 is connected to the low potential side of the capacitor C11. The output terminal of the constant voltage circuit 20 is connected to the high potential side of the capacitor C11. The high potential side of the capacitor C11 is connected to a connection point P11 between the resistor R7 and the resistor R13 in the first control unit 4a.

  In the lighting device 10 of the present embodiment, the input voltage of the inverting input terminal of the comparator CP1 in the first control unit 4a is obtained by dividing the output voltage of the DC-DC conversion unit 2 by the resistor R11 and the resistor R12. Voltage (voltage across resistor R12). The input voltage at the non-inverting input terminal of the comparator CP1 is a voltage obtained by dividing the third drive voltage from the third power supply unit 19 by the resistor R13 and the resistor R14 (a voltage across the resistor R14). .

  The comparator CP1 compares the input voltage at the inverting input terminal with the input voltage at the non-inverting input terminal. The comparator CP1 turns on the transistor Tr1 when the input voltage at the inverting input terminal is different from the input voltage at the non-inverting input terminal. Here, in the lighting device 10 of the present embodiment, when the transistor Tr1 is turned on, a current flows through the light emitting diode PD1 of the photocoupler PC1, and the phototransistor PT1 of the photocoupler PC1 is turned on. In the lighting device 10, when the phototransistor PT1 is turned on, a feedback signal is input to the third pin of the control IC 16.

  The control IC 16 adjusts the on-duty ratio of the switching element Q1 of the DC-DC converter 2 when the feedback signal is input. Thereby, in the lighting device 10 of the present embodiment, even if the load of the light source unit 11 fluctuates, the output voltage of the DC-DC conversion unit 2 can be stabilized. The control IC 16 adjusts the on-duty ratio of the switching element Q1 when the feedback signal is input. However, the control IC 16 is not limited to this, and may adjust the oscillation frequency of the switching element Q1, for example.

  The data processing unit 5 includes a receiving device (not shown) that can receive the control data from the control device 30, and an instruction unit (indicated by the drawing) that instructs the operation of the control unit 4 based on the control data from the receiving device. Not shown).

  The instructing unit can be configured, for example, by installing an appropriate second program in the second macro computer. The instruction unit outputs a control signal S1 for the third control unit 4c to drive or stop the cooling unit 3 to the third control unit 4c. In the present embodiment, for example, a PWM signal is used as the control signal S1.

  In the lighting device 10 of the present embodiment, when the data processing unit 5 outputs the control signal S1 and turns on the transistor Tr3 of the third control unit 4c, the transistor Tr2 is turned on and the second power supply unit 18 receives the second 2 is supplied to the drive motor 9, and the rotating unit 8 rotates (drives the cooling unit 3). Thereby, in the lighting device 10 of the present embodiment, it is possible to efficiently dissipate the heat generated in the light source unit 11.

  The instruction unit outputs control signals S2 to S5 for turning on / off each of the switching elements Q2 to Q5 in the second control unit 4b. In the present embodiment, for example, PWM signals are used as the control signals S2 to S5.

  In the lighting device 10 of the present embodiment, when the data processing unit 5 outputs the control signal S2 and the switching element Q2 of the second control unit 4b is turned on, the seven red LEDs 13a are lit. In the present embodiment, when the data processing unit 5 outputs the control signal S3 and the switching element Q3 of the second control unit 4b is turned on, the seven green LEDs 13b are lit. In the present embodiment, when the data processing unit 5 outputs the control signal S4 and the switching element Q4 of the second control unit 4b is turned on, the seven blue LEDs 13c are lit. In the present embodiment, when the data processing unit 5 outputs the control signal S5 and the switching element Q5 of the second control unit 4b is turned on, the seven white LEDs 13d are lit.

  Moreover, in the lighting device 10 of the present embodiment, the color temperature of the light source unit 11 can be adjusted by adjusting the on-duty ratios of the control signals S2 to S5 output from the data processing unit 5 separately. It becomes possible. In the present embodiment, the color temperature of the light source unit 11 can be adjusted within a range of 2700K to 6500K.

  In the lighting device 10 of the present embodiment, the light output level of the light source unit 11 can be adjusted by adjusting the on-duty ratios of the control signals S2 to S5 output from the data processing unit 5, respectively. (The light source unit 11 can be dimmed and lit). In the present embodiment, the light output level of the light source unit 11 can be adjusted within a range of 10% to 100%.

  Here, in the lighting device 10 of the present embodiment, the control data from the control device 30 includes setting data for the color temperature and light output level of the light source unit 11. In the lighting system described above, when the data generator 31 of the control device 30 is a remote controller, for example, a light receiving unit capable of receiving infrared light or a receiving unit capable of receiving radio waves may be used as the receiving device.

  By the way, in the lighting device 10 of the present embodiment, when the data processing unit 5 outputs the control signals S2 to S5 and turns on the switching elements Q2 to Q5 in the second control unit 4b, each solid state light emission of the light source unit 11 is performed. Element 13 is lit. Further, in the lighting device 10, after each solid light emitting element 13 of the light source unit 11 is turned on, the data processing unit 5 outputs the control signal S1 to turn on the transistors Tr2 and Tr3 of the third control unit 4c. The second drive voltage is supplied from the second power supply unit 18 to the drive motor 9, and the rotating unit 8 rotates (drives the cooling unit 3). Thereby, in the lighting device 10 of the present embodiment, it is possible to efficiently dissipate the heat generated in the light source unit 11, and it is possible to suppress the temperature rise of each solid state light emitting element 13.

  Further, in the lighting device 10 of the present embodiment, when the data processing unit 5 outputs the control signals S2 to S5 and turns off the switching elements Q2 to Q5 in the second control unit 4b, each solid state light emission of the light source unit 11 is performed. The element 13 is turned off. Further, in the lighting device 10, when each solid state light emitting element 13 of the light source unit 11 is turned off, the data processing unit 5 immediately outputs the control signal S1 to turn off the transistors Tr2 and Tr3 of the third control unit 4c. Then, power supply from the second power supply unit 18 to the drive motor 9 is stopped. As a result, the rotating unit 8 stops (the cooling unit 3 is stopped). That is, the control unit 4 (third control unit 4c), when the light source unit 11 is turned off with the power supplied from the commercial power supply AC (the lighting device 10 enters the standby mode), the power supply unit (second power supply unit). Power supply to the cooling unit 3 from 18) is stopped. Thereby, in the lighting device 10 of the present embodiment, it is possible to reduce power consumption (standby power of the lighting device 10) when the light source unit 11 is turned off in a state where power is supplied from the commercial power supply AC, thereby further saving energy. It becomes possible to plan.

  Here, in the lighting device 10 of the present embodiment, the third control unit 4 c may output a drive signal for driving the cooling unit 3 to the cooling unit 3. Specifically, the third control unit 4 c may output the drive signal including the second drive voltage generated by the second power supply unit 18 to the cooling unit 3. In this case, it is preferable that when the light source unit 11 is turned off in a state where power is supplied from the commercial power supply AC, the third control unit 4c stops outputting the drive signal. Thereby, also in the lighting device 10 of the present embodiment, it is possible to reduce the power consumption when the light source unit 11 is turned off in a state where power is supplied from the commercial power supply AC, and it is possible to further save energy.

  Moreover, it is preferable that the control part 4 suppresses or stops the cooling function of the cooling part 3 when the light output level of the light source part 11 is a specified value (for example, 50%) smaller than 100%. More specifically, in the lighting device 10 of the present embodiment, the light output level of the light source unit 11 is adjusted to the specified value by adjusting the on-duty ratios of the control signals S2 to S5 output from the data processing unit 5, respectively. When it becomes below, it is preferable to immediately suppress or stop the cooling capacity of the cooling unit 3 by adjusting the on-duty ratio of the control signal S1 output from the data processing unit 5. Thereby, in the lighting device 10 of the present embodiment, the control unit 4 performs dimming lighting of the light source unit 11, and when the light source unit 11 becomes light load and the amount of heat generated in the light source unit 11 is small, the cooling of the cooling unit 3 is performed. Since the capability is suppressed or stopped, it is possible to reduce the power consumption in the dimming lighting state of the light source unit 11, and further energy saving can be achieved.

  Here, in the lighting device 10 of the present embodiment, as a method for determining when the light output level of the light source unit 11 is equal to or less than the specified value, the on-duty of each control signal S2 to S5 output from the data processing unit 5 is determined. Although the determination is performed by the method of adjusting the ratios, the determination is not limited thereto, and may be performed using, for example, an illuminance sensor (not shown) that detects the light output level of the light source unit 11.

  In the lighting device 10 according to the present embodiment described above, the AC-DC converter 1 that converts an AC voltage from the commercial power source AC into a DC voltage, and the DC voltage converted by the AC-DC converter 1 is a predetermined DC voltage. A DC-DC conversion unit 2 for converting to DC, a cooling unit 3 for cooling the light source unit 11 connected to the output side of the DC-DC conversion unit 2, and a control unit 4 for controlling the DC-DC conversion unit 2. ing. Further, in the lighting device 10 of the present embodiment, when the control unit 4 turns off the light source unit 11 in a state where power is supplied from the commercial power supply AC, the cooling function of the cooling unit 3 is suppressed or stopped. In this state, it is possible to reduce power consumption when the light source unit 11 is turned off.

  In the lighting device 10 of the present embodiment, an LED is used as the solid state light emitting element 13. However, the present invention is not limited thereto, and for example, an organic electroluminescence element may be used.

  Hereinafter, an example of a lighting fixture using the above-described lighting device 10 will be described with reference to FIG.

  The lighting fixture of the present embodiment includes the light source unit 11 described above and the lighting device 10 described above. This lighting fixture is a lighting fixture in which the light source unit 11 and the lighting device 10 are separately arranged, and the light source unit 11 and a part of the lighting device 10 are connected via a first connection line 39. Moreover, the above-mentioned lighting fixture is embedded and arranged in the ceiling material 29 etc., for example.

  The light source unit 11 includes a light emitting module 12 having a mounting substrate 14 on which a plurality (28 in this embodiment) of solid light emitting elements 13 are mounted, and a case 15 to which the light emitting module 12 can be detachably attached. ing. In FIG. 4, five of the 28 solid state light emitting elements 13 are visible.

  For example, a metal-based printed wiring board can be used as the mounting substrate 14. In the present embodiment, the planar shape of the mounting substrate 14 is rectangular, but is not limited thereto, and may be other polygonal shapes, circular shapes, or the like. In the present embodiment, a metal-based printed wiring board is used as the mounting board 14, but the present invention is not limited thereto, and for example, a ceramic board, a glass epoxy board, a paper phenol board, or the like may be used.

  The light emitting module 12 is attached to the case 15 via an insulating sheet 22 having electrical insulation and thermal conductivity.

  The case 15 can be formed of a metal material such as aluminum, for example. The case 15 is formed in a bottomed cylindrical shape, for example.

  In the lighting apparatus of the present embodiment, the light emitting module 12 is disposed on the inner bottom surface of the case 15 via the insulating sheet 22. Thereby, in the lighting fixture of this embodiment, it becomes possible to efficiently conduct the heat generated in the light emitting module 12 to the case 15.

  In the lighting fixture of the present embodiment, a diffusion plate 23 that diffuses the light emitted from each solid light emitting element 13 is disposed on the opening side (lower side in FIG. 4) of the case 15. The diffusion plate 23 can be formed of a translucent member (for example, acrylic resin, glass, etc.). In the present embodiment, the shape of the diffusion plate 23 is, for example, a disk shape.

  The cooling unit 3 of the lighting device 10 described above is fixed to the side of the bottom of the case 15 opposite to the opening side. That is, the cooling unit 3 is fixed to the light source unit 11. In the lighting fixture of this embodiment, since the cooling unit 3 can cool the light source unit 11, the heat conducted to the case 15 can be radiated.

  In addition, the lighting fixture of the present embodiment includes a fixture main body 24 that holds the light source unit 11.

  The instrument body 24 can be formed of a metal material such as aluminum, for example. The instrument body 24 includes a cylindrical side portion 24a and a flange portion 24b extending outward from the lower end portion of the side portion 24a.

  The side portion 24a is formed in a tapered cylindrical shape whose opening area gradually increases from the upper end portion to the lower end portion of the side portion 24a.

  The light source unit 11 is disposed at the upper end of the side portion 24a.

  Here, in the lighting fixture of the present embodiment, the diffusion plate 23 is arranged on the opening side of the case 15 of the light source unit 11, but the diffusion plate 23 is arranged on the lower end side of the side portion 24 a of the appliance main body 24. May be.

  The instrument body 24 has a side portion 24 a embedded in an embedded hole 29 a penetrating the ceiling material 29, and a flange portion 24 b in contact with a peripheral portion of the embedded hole 29 a on the lower surface of the ceiling material 29. It is attached to the material 29.

  Moreover, the instrument main body 24 has a pair of fixing brackets 25 and 25 for fixing the instrument main body 24 on one surface side (the upper surface side in FIG. 4) of the ceiling material 29. The pair of fixing brackets 25, 25 are provided outside the side portion 24 a of the instrument body 24.

  Here, in the lighting fixture of the present embodiment, a reflector (not shown) that reflects the light emitted from the light emitting unit 11 may be provided inside the fixture body 24. In this case, what is necessary is just to fix the said reflecting plate inside the instrument main body 24, for example with fixing tools, such as a spring. Thereby, in the lighting fixture of this embodiment, it becomes possible to improve the light emission efficiency of the light light-emitted from the light emission part 11. FIG.

  Moreover, in the lighting fixture of this embodiment, except the cooling part 3 of the lighting device 10 (AC-DC conversion part 1, DC-DC conversion part 2, control part 4, data processing part 5, and each power supply part 17-19). The power supply device 26 (see FIGS. 1 and 2) is configured.

  The power supply device 26 is accommodated in a box-shaped case 27 made of, for example, a metal material or a resin material. In the present embodiment, the case 27 is disposed on the one surface side of the ceiling material 29.

  Further, the power supply device 26 has an input unit 28 for inputting the control data from the control device 30 and a pair of input terminals 34 and 34 (see FIG. 2) electrically connected to the commercial power supply AC. Is provided. In the present embodiment, each of the input unit 28 and the pair of input terminals 34 and 34 is exposed from one side surface (left side surface in FIG. 4) of the case 27.

  In addition, a first connector 39a (see FIG. 2) provided at one end of a first connection line 39 for electrical connection with the light source unit 11 can be detachably connected to the power supply device 26. Two connectors 35 (see FIG. 2) are provided. Further, the power supply device 26 has a fourth connector 36 that can be detachably connected to a third connector 40 a provided at one end of a second connection line 40 for electrical connection with the cooling unit 3. , Provided. In the present embodiment, each of the second connector 35 and the fourth connector 36 is exposed from the other side surface (the right side surface in FIG. 4) opposite to the one side surface of the case 27.

  Here, the light source unit 11 is provided with a sixth connector 37 that can removably connect a fifth connector 39 b provided at the other end of the first connection line 39. Further, the cooling unit 3 is provided with an eighth connector 38 that can detachably connect a seventh connector 40 b provided at the other end of the second connection line 40.

  Since the lighting fixture of the present embodiment described above includes the light source unit 11 having the solid light emitting element 13 and the lighting device 10 described above, the light source unit 11 is turned off with power supplied from the commercial power source AC. It becomes possible to reduce power consumption.

DESCRIPTION OF SYMBOLS 1 AC-DC conversion part 2 DC-DC conversion part 3 Cooling part 4 Control part 10 Lighting device 11 Light source part 13 Solid light emitting element 18 2nd power supply part (power supply part)

Claims (7)

An AC-DC converter that converts an AC voltage from a commercial power source into a DC voltage; a DC-DC converter that converts the DC voltage converted by the AC-DC converter into a predetermined DC voltage; and the DC-DC A cooling unit that cools a light source unit connected to an output side of the conversion unit; and a control unit that controls the AC-DC conversion unit or the DC-DC conversion unit , wherein the control unit includes the AC-DC conversion. the output side of the section are electrically connected, the front Symbol controller, when the light source unit is turned off in a state of being powered from the commercial power source, lit, characterized in that to suppress or stop the cooling function of the cooling unit apparatus.   The lighting device according to claim 1, wherein the control unit suppresses or stops the cooling function of the cooling unit when a light output level of the light source unit is equal to or less than a predetermined value smaller than 100%.   A power supply unit configured to supply a driving voltage for driving the cooling unit to the cooling unit, and the control unit is configured to turn on the cooling unit from the power supply unit when the light source unit is turned off while being supplied with power from the commercial power source. The lighting device according to claim 1, wherein power supply to the power supply is stopped.   The lighting device according to claim 3, wherein the power supply unit generates the drive voltage from the predetermined DC voltage converted by the DC-DC conversion unit.   The control unit outputs a drive signal for driving the cooling unit to the cooling unit, and the control unit outputs an output of the drive signal when the light source unit is turned off with power supplied from the commercial power source. The lighting device according to claim 1, wherein the lighting device is stopped.   An illumination fixture comprising: the light source unit having a solid light-emitting element; and the lighting device according to any one of claims 1 to 5.   The lighting apparatus according to claim 6, wherein the light source unit includes a plurality of the solid state light emitting elements connected in series and parallel.

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