JP2011054551A - Power supply device, led illumination lamp and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device, an LED illumination lamp and a luminaire, which can ensure improvement in safety, when removing a light source. <P>SOLUTION: An interlock switch 51 is assembled into a female connector 28, and which a male connector 31 of a discharge lamp 30 or a male connector 33 of an LED illumination lamp 32 is to be connected; and when the male connector 31 of the discharge lamp 30 or the male connector 33 of the LED illumination lamp 32 is to be cut off from the female connector 28, the interlock switch 51 performs off-operation and cuts off power supply. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply device and a luminaire that can light a semiconductor light emitting element composed of a light emitting diode (LED element) as a light source.

  2. Description of the Related Art Conventionally, power supply devices that are turned on using a discharge lamp such as a fluorescent lamp as a light source are known. Such a power supply device is of an inverter type using an inverter circuit, and the discharge lamp is turned on by controlling the switching cycle (operating frequency) of the switching elements constituting the inverter circuit.

  On the other hand, recently, LED illuminating lamps using LED elements as light sources have been put into practical use, and an illuminating apparatus that can be lit by an inverter type power supply device by replacing such an LED illuminating lamp with a discharge lamp is also considered. (Patent Document 1).

JP 2008-103304 A

  However, in such a configuration, when the LED illumination lamp is removed from the fixture in a state where the LED illumination lamp is lit, an electric circuit is continuously formed by the LED element until the LED illumination lamp is completely removed. Therefore, if an operator touches the output terminal of the power supply device in this state, a problem may occur in terms of safety.

  This invention is made | formed in view of the said situation, and it aims at providing the power supply device which can ensure the safety | security at the time of removal of a light source, an LED illumination light, and a lighting fixture.

To solve the above problem,
According to the first aspect of the present invention, it is possible to connect an output generating unit that generates an AC output and / or a DC output from a power source; and a light source including a semiconductor light emitting element that is turned on by an output generated from the output generating unit. And connecting means for output; and output shut-off means for enabling power supply to the output generating means to be shut off when the light source connected to the connecting means is disconnected.

  Here, when the output generation means is an AC output, it includes a direct current conversion means such as a rectifying and smoothing means on the light source side, thereby turning on a light source made of a semiconductor light emitting element. Further, the output blocking means may be a mechanical or electrical switch structure, or may be one that stops the output of the output generation means by detecting the removal of the light source. In this case, in the case of detecting the removal of the light source, it is desirable that the time from the detection of the removal until the output is stopped is within 0.1 seconds. That is, within this time, the output can be reliably stopped before the operator touches the electrode or the like.

  The invention according to claim 2 is an output generating means for generating an AC output from a power source; an insulating transformer whose output side is insulated from an input side to which an AC output is given from the output generating means; and from an output side of the insulating transformer Connecting means for detachably connecting a light source comprising a semiconductor light emitting element that is turned on by the generated output.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the connection means can be connected to a light source comprising a discharge lamp, and the light source connected to the connection means is a discharge lamp or a semiconductor light emitting device. A light source determination unit that determines whether or not; and a control unit that controls the output generation unit to generate an AC output or a DC output based on a determination result of the light source determination unit.

  According to a fourth aspect of the present invention, there is provided a connection means for enabling connection of the LED element that is lit by the output generated by the output generation means to the LED element of the light source; and an output generation means for generating an alternating current output or a direct current output. And a lighting circuit interrupting means for enabling the lighting circuit of the LED element to be disconnected when the LED element connected to the connection means is disconnected.

  Here, the output generation means for generating the AC output is a high-frequency power supply or a commercial power supply that outputs a high frequency such as an inverter, and these power supplies are connected to the LED element via the connection means or a commercial power supply. It also includes LED lighting directly connected to the power supply.

  According to a fifth aspect of the present invention, there is provided connection means for enabling connection of output generation means for generating alternating current output by power from a power supply to the power supply; insulation on the output side from an input side to which alternating current output is given from the output generation means An LED illumination lamp comprising: an isolated transformer; and an LED element of a light source that is turned on by an output generated from an output side of the isolation transformer.

  A sixth aspect of the present invention is a lighting fixture comprising: the power supply device according to any one of the first to third aspects; and a fixture main body having the power supply device.

  The invention described in claim 7 is an illumination fixture comprising the LED illumination lamp according to claim 4 or 6; and an appliance body having the LED illumination lamp.

  According to the first aspect of the present invention, when the light source composed of the semiconductor light emitting element is disconnected from the connecting means, the power supply can be forcibly cut off and the output of the output generating means can be stopped. Can be secured.

  According to the second aspect of the present invention, since the light source made of the semiconductor light emitting element is connected to the output generating means via the insulating transformer, it is possible to ensure the safety when removing the light source.

  According to the third aspect of the present invention, when a discharge lamp or a semiconductor light emitting element is connected as a light source to the connecting means, an AC output or a DC output corresponding to the light source can be obtained from the output generating means, and these light sources are connected to the connecting means. When it is further separated, the output of the output generating means can be stopped by the output blocking means.

  According to the fourth aspect of the present invention, when the LED element of the light source is disconnected from the connection means, the lighting circuit of the LED element can be forcibly interrupted, so that the safety when removing the LED illumination light is ensured. be able to.

  According to the fifth aspect of the present invention, since the LED element of the light source is connected to the output generating means via the insulation transformer, it is possible to ensure the safety when removing the LED illumination lamp.

The perspective view which shows the lighting fixture with which the power supply device concerning the 1st Embodiment of this invention is applied. The figure which shows schematic structure of the power supply device concerning 1st Embodiment. The figure which shows schematic structure of the light control part used for 1st Embodiment. The flowchart for demonstrating operation | movement of 1st Embodiment. The figure which shows schematic structure of the power supply device concerning the 2nd Embodiment of this invention. The figure which shows the waveform of the voltage at the time of starting of the HID lamp of 2nd Embodiment, and an LED illumination light, and an electric current. The figure which shows schematic structure of the power supply device concerning the 3rd Embodiment of this invention. The figure which shows schematic structure of the LED illuminating lamp concerning the 4th Embodiment of this invention. The figure which shows schematic structure of the LED illuminating lamp concerning the 5th Embodiment of this invention. The figure which shows schematic structure of the LED illumination light concerning the 6th Embodiment of this invention. The figure which shows schematic structure of the LED illumination light concerning the 7th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, the lighting fixture to which the power supply device of the present invention is applied will be briefly described. In FIG. 1, reference numeral 1 denotes an instrument body, and the instrument body 1 has a disk-shaped base 1a. Then, ring-shaped discharge lamps 2 and 3 having different diameters are concentrically arranged as light sources on the base 1a, and a milky white shade 4 is mounted so as to cover the discharge lamps 2 and 3. Here, the discharge lamps 2 and 3 are described as the light sources, but instead of these discharge lamps 2 and 3, LED illumination lamps using LED elements, which are semiconductor light emitting elements (not shown), as light sources are arranged on the base 1 a. It is also possible to do. A power supply device 100 of the present invention is disposed inside the instrument body 1. Although not shown in the figure, it is a matter of course that a reflector, terminals, wirings and the like are also provided.

  FIG. 2 shows a schematic configuration of the power supply device 100 of the present invention incorporated in the fixture body 1 of the lighting fixture thus configured.

  In FIG. 2A, reference numeral 10 denotes an AC power source, and the AC power source 10 includes a commercial power source (not shown). The AC power supply 10 is connected to an input terminal of a full wave rectifier circuit 11. The full-wave rectifier circuit 11 generates an output obtained by full-wave rectifying AC power from the AC power supply 10. A ripple current smoothing capacitor 12 is connected between the positive and negative output terminals of the full-wave rectifier circuit 11.

  A boost chopper circuit 13 is connected to both ends of the capacitor 12 as power supply means. In this step-up chopper circuit 13, a series circuit of an inductor 14 constituting a step-up transformer and a field effect transistor 15 as a switching element is connected between the positive and negative output terminals of the full-wave rectifier circuit 12, and is parallel to the field effect transistor 15. An electrolytic capacitor 17 which is a smoothing capacitor is connected to a flywheel diode 16 having the polarity shown in FIG. A series circuit of resistors 18 and 19 is connected to both ends of the electrolytic capacitor 17 as voltage detecting means. The resistors 18 and 19 generate a divided voltage from the output of the electrolytic capacitor 17, and output the terminal voltage of the resistor 19 to the control unit 20. The field effect transistor 15 is turned on / off based on a comparison result between the terminal voltage of the resistor 19 and a reference voltage prepared in advance in the control unit 20. The inductor 14 generates a boosted output in the electrolytic capacitor 17 via the flywheel diode 16 by storing and releasing electromagnetic energy accompanying the on / off operation of the field effect transistor 15. The control unit 20 will be described later.

  The boost chopper circuit 13 is connected to an output generation circuit 21 as output generation means. In this output generation circuit 21, a series circuit of field effect transistors 221 and 222 as a switching element is connected in parallel with the electrolytic capacitor 17. Further, the field effect transistors 221 and 222 are controlled by the control unit 20 with their gates connected to the control unit 20. In this case, the output generation circuit 21 performs two operations according to instructions from the control unit 20, and the first operation is a so-called AC output means by means of field-effect transistors 221 and 222 connected in series. A half-bridge type inverter circuit is configured, and a high-frequency AC output is generated by alternately turning on and off these field effect transistors 221 and 222. In the second operation, one of the field effect transistors 221 and 222 is turned off (in this case, the field effect transistor 222 is operated as a free-wheeling diode by a body diode), and the other is performed. The field effect transistor 221 constitutes a step-down chopper, and the chopper output is generated by turning the field effect transistor 221 on and off. In this case, a synchronous rectification step-down chopper that generates a DC output by synchronizing with the field effect transistor 222 may be configured.

  The output generation circuit 21 is connected to a field effect transistor 222 in parallel with a series circuit of an inductor 23 as a ballast choke, a capacitor 24, and a capacitor 25 as a DC cut impedance element. A switch element 26 is connected to the capacitor 25 in parallel. The switch element 26 is turned on / off by an instruction from the control unit 20 to open or short-circuit the DC cut capacitor 25.

  Here, when the output generation circuit 21 operates as a half-bridge type inverter, the inductor 23 and the capacitor 24 are operated as a resonance circuit with respect to the high-frequency AC output generated by alternately turning on and off the field effect transistors 221 and 222. The Further, when the output generation circuit 21 operates as a step-down chopper, a DC output that is stepped down at both ends of the capacitor 24 is generated by the accumulation and release of electromagnetic energy in the inductor 23 that accompanies the on / off of the field effect transistor 221.

  The connection point 28a of the female connector 28 as a connection means is connected to the connection point of the inductor 23 and the capacitor 24 via the first auxiliary winding 231 of the inductor 23 and the capacitor 27. A connection terminal 28b of the female connector 28 is connected to the connection point. A connection terminal 28c of the female connector 28 is connected to the connection point of the capacitors 24 and 25 via the second auxiliary winding 232 of the inductor 23 and the capacitor 29. The connection terminal 28d of the connector 28 is connected. The first auxiliary winding 231 and the second auxiliary winding 232 preheat the filaments 301 and 302 of the discharge lamp 30 such as a fluorescent lamp described later.

  The male connector 31 of the LED lamp 32 (refer FIG.2 (b)) which has the male connector 31 of the discharge lamp 30, or the LED element as another connection means or the LED element is connected to the female connector 28. In the illustrated example, a discharge lamp 30 (corresponding to the discharge lamps 2 and 3 shown in FIG. 1) is connected.

  The female connector 28 incorporates an interlock switch 51 as an output blocking means. The interlock switch 51 is turned on when the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is connected to the female connector 28, and the male connector 31 ( Alternatively, when the male connector 33) of the LED illumination lamp 32 is disconnected, the off operation is performed. In this case, the interlock switch 51 is turned on only when the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is securely connected to the female connector 28, and the male connector of the discharge lamp 30. 31 (or the male connector 33 of the LED lighting 32) is immediately turned off in a state where a reliable connector connection state is not ensured by the disconnecting operation.

  The interlock switch 51 is connected in series between the AC power supply 10 and the full-wave rectifier circuit 11. Then, the AC power supply 10 can be connected to the full-wave rectifier circuit 11 by the ON operation in which the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED lighting lamp 32) is connected to the female connector 28, and the power can be supplied. When the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illuminating lamp 32) is disconnected from the female connector 28, the AC power supply 10 is disconnected from the full-wave rectifier circuit 11 to cut off the power supply, and the output generation circuit 21 output is stopped.

  The discharge lamp 30 has a pair of filaments 301 and 302, and one of the filaments 301 is connected to the connection terminals 31a and 31b of the male connector 31 corresponding to the connection terminals 28a and 28b of the female connector 28. The filament 302 is connected to the connection terminals 31c, 31d of the male connector 31 corresponding to the connection terminals 28c, 28d of the female connector 28. In the discharge lamp 30, the connection terminals 31 a to 31 d are respectively connected to the connection terminals 28 a to 28 d of the female connector 28 with the male connector 31 connected to the female connector 28.

  On the other hand, the LED illumination lamp 32 corresponds to the connection terminals 33a and 33b of the male connector 33 and the connection terminals 28c and 28d of the female connector 28 corresponding to the connection terminals 28a and 28b of the female connector 28 as shown in FIG. The connection terminals 31c and 31d of the male connector 33 are respectively provided. A resistance element 34 corresponding to the filament resistance of the discharge lamp 30 is connected between the connection terminals 33a and 33b, and a resistance element 35 corresponding to the filament resistance of the discharge lamp 30 is also connected between the connection terminals 31c and 31d. It is connected. In addition, an input terminal of a full-wave rectifier circuit 36 composed of a diode bridge is connected between the connection terminals 33b and 33d. Between the positive and negative output terminals of the full-wave rectifier circuit 36, one or a plurality of LED elements 37 connected in series as semiconductor light emitting elements are connected. Here, the resistance element 34 (35) corresponds to the resistance value (filament resistance) of the filament 301 (302) of the discharge lamp 30, and a resistance value corresponding to the number of the LED elements 37 is set. . For example, when the number of the LED elements 37 is one, it is 4.7 kΩ, when the number is two, 10 kΩ, when the number is three, 47 kΩ, and when the number is four, it is 100 kΩ.

  And such LED lighting 32 also connects each connection terminal 31a-31d to the connection terminals 28a-28d of the female connector 28 in the state which connected the male connector 33 to the female connector 28, respectively.

  In addition, if the connection direction of the male connector 33 connected to the female connector 28 is previously regulated in one direction when the LED illumination lamp 32 is attached to the lighting fixture, the full-wave rectification circuit 36 can be omitted. .

  Between the connection terminal 28d of the female connector 28 and the DC cut capacitor 25, a current detection circuit 38 is connected in series as load current detection means. The current detection circuit 38 is composed of a series circuit of a resistance element 381 and a diode 383 of the illustrated polarity and a parallel circuit of the diode 382 of the illustrated polarity, and loads a unidirectional current flowing through the discharge lamp 30 (or the LED illumination lamp 32). Detect as current.

  The other end of the resistance element 39 to which a reference voltage Vcc (for example, +15 V) is applied to one end is connected to the connection terminal 28c of the female connector 28. At the connection point P between the resistance element 39 and the connection terminal 28c, the filament 302 of the discharge lamp 30 or the resistance element 33 (resistance) of the LED lamp 32 used to determine whether the light source is the discharge lamp 30 or the LED illumination lamp 32. An output voltage VR corresponding to each resistance value (filament resistance) of the element 34) is generated. This output voltage VR is input to the control unit 20.

  The control unit 20 controls the entire power supply apparatus, and includes a boost chopper circuit control unit 201, a light source determination unit 202, an output generation circuit control unit 203, and a dimming control unit 204. The step-up chopper circuit control unit 201, the light source determination unit 202, the output generation circuit control unit 203, and the dimming control unit 204 are configured by software. Of course, it can also be configured by hardware. The step-up chopper circuit control unit 201 stores a reference voltage (not shown) in advance, and controls the on / off operation of the field effect transistor 15 based on the comparison result between the reference voltage and the terminal voltage of the resistor 19. A boosted output voltage is generated across the electrolytic capacitor 17 by the accumulation and release of electromagnetic energy in the inductor 14 accompanying the on / off operation of 15.

  The light source determination unit 202 determines whether the light source is the discharge lamp 30 or the LED illumination lamp 32 based on the output voltage VR generated at the connection point P between the resistance element 39 and the connection terminal 28c. Specifically, in the case of the discharge lamp 30, the resistance value of the filament 302 is about 10Ω, and the output voltage VR at the connection point P is 1V or less. On the other hand, in the case of the LED lighting lamp 32, for example, when the number of the LED elements 37 is one and the resistance element 34 (35) has a resistance value of 4.7 kΩ, the output voltage VR is 1.4 V and the two LED elements 37 are present. When the resistance element 34 (35) has a resistance value of 10 kΩ, the output voltage VR is 2.6 V, and when the three LED elements 37 and the resistance element 34 (35) has a resistance value 47 kΩ, the output voltage VR is 7.5 V, When the number of LED elements 37 is four and the resistance element 34 (35) has a resistance value of 100 kΩ, the output voltage VR is 10.2V. Accordingly, the light source determination unit 202 sets threshold values V1 and V2 (where V1 <V2) having different sizes in advance. If VR ≦ V1, the discharge lamp 30 is determined, and if V1 <VR ≦ V2, If the LED illumination lamp 32 is determined and V2 <VR, it is determined that no light source is connected.

  The output generation circuit control unit 203 first operates the output generation circuit 21 as a half-bridge type inverter immediately after power-on. If the light source is determined to be the discharge lamp 30 based on the determination result of the light source determination unit 202, the inverter operation of the output generation circuit 21 is continued, and if the light source is determined to be the LED illumination lamp 32, the output generation circuit 21 is stepped down. Switch to chopper and operate. When the output generating circuit 21 is operated as an inverter, the output generating circuit control unit 203 configures the field effect transistors 221 and 222 as half-bridge type inverter circuits, and the field effect transistor 221 at an operating frequency in the range of several tens of kHz to 200 kHz. , 222 are alternately turned on and off to generate a high-frequency AC output. When operating as a step-down chopper, one of the field effect transistors 221 and 222 is turned off, and the other field effect transistor 221 is turned on based on a control signal output from the dimming control unit 204. Turns on and off to generate chopper output. When the light source determination unit 202 determines that the light source is the LED illuminating lamp 32, the output generation circuit control unit 203 turns on the switch element 26 to short-circuit the DC cut capacitor 25.

  The dimming control unit 204 includes a reference signal generation unit 2041 and a comparator 2042 as shown in FIG. The reference signal generation unit 2041 is connected to an external dimming signal generation unit 40, and the dimming signal of the dimming signal generation unit 40 is used for all-light lighting and dimming lighting of the discharge lamp 30 (or the LED illumination lamp 32). Generating a reference signal for The comparator 2042 receives the reference signal generated by the reference signal generation unit 2041 at one terminal and the load current detected by the current detection circuit 38 at the other terminal, and outputs the comparison result as an output generation circuit control unit. It outputs as a control signal for 203. Thereby, the current flowing through the discharge lamp 30 (or the LED illumination lamp 32) with respect to the reference signal generated by the reference signal generation unit 2041 is controlled so as to approach the reference signal, and constant current control is performed.

  Next, the operation of the embodiment configured as described above will be described.

  First, the case where the male connector 31 of the discharge lamp 30 is connected to the female connector 28 will be described. In this case, when the male connector 31 of the discharge lamp 30 is connected to the female connector 28, the interlock switch 51 of the female connector 28 is turned on, and the AC power supply 10 can be supplied to the full-wave rectifier circuit 11.

  From this state, when a power switch (not shown) is turned on in step 401, the process proceeds to step 402, where the boost chopper circuit 13 performs the boost chopper operation. In this case, when the AC power of the AC power supply 10 is full-wave rectified by the full-wave rectifier circuit 11 and supplied to the boost chopper circuit 13, the boost chopper circuit control unit 201 of the control unit 20 uses the reference voltage prepared in advance. The field effect transistor 15 is turned on and off based on the comparison result with the terminal voltage of the resistor 19 of the voltage detecting means. As a result, a boosted output voltage is generated in the electrolytic capacitor 17 via the flywheel diode 16 due to the accumulation and release of electromagnetic energy of the inductor 14 accompanying the on / off operation of the field effect transistor 15.

  Next, it progresses to step 403 and an inverter operation | movement is performed initially. In step 403, the output voltage of the boost chopper circuit 13 is input to the output generation circuit 21. In this case, in the output generation circuit 21, the field generation transistors 221 and 222 are configured as half-bridge inverter circuits by the output generation circuit control unit 203 of the control unit 20, and at the same time, the drive input from the output generation circuit control unit 203. The field effect transistors 221 and 222 are turned on / off by a signal, and high frequency alternating current is generated between the drain and source of the field effect transistor 222.

  In this state, in step 404, the output voltage VR corresponding to the filament resistance is detected in order to determine the light source. In step 405, it is determined whether the light source is the discharge lamp 30 or the LED illumination lamp 32 based on the output voltage VR. In this case, the connection point P between the resistance element 39 and the connection terminal 28c corresponds to the resistance value of the filament 302 of the discharge lamp 30 or the resistance value (filament resistance) of the resistance element 34 (resistance element 35) of the LED illumination lamp 32. An output voltage VR is generated, and this output voltage VR is input to the light source determination unit 202 of the control unit 20.

  The light source determination unit 202 determines whether the light source is the discharge lamp 30 or the LED illumination lamp 32 using preset threshold values V1 and V2. Assuming that the discharge lamp 30 is connected as a light source, Vp ≦ V1 is established in step 405, and the discharge lamp 30 is determined.

  In this case, in step 407, the switch element 26 is turned on to open the DC cut capacitor 25. This operation has already been performed at the time of the inverter operation in step 403, and the same operation is repeated in step 407.

  Next, the process proceeds to step 408, and the inverter operation described in step 403 is continued. Also in this case, the output generation circuit 21 maintains the half bridge type inverter circuit by the field effect transistors 221 and 222 by the output generation circuit control unit 203 of the control unit 20, and the drive signal input from the output generation circuit control unit 203 Thus, the field effect transistors 221 and 222 are turned on and off to generate a high-frequency AC output.

  The high frequency alternating current output from the output generation circuit 21 is given to the inductor 23 and the resonance capacitor 24, and the inductor 23 and the capacitor 24 are operated as a resonance circuit. In this state, when a preheating current flows from the first auxiliary winding 231 and the second auxiliary winding 232 to the filaments 301 and 302 of the discharge lamp 30, a predetermined starting voltage is applied between the filaments 301 and 302 of the discharge lamp 30. Is applied, and the discharge lamp 30 is turned on.

  Next, at step 409, the current flowing through the discharge lamp 30 is detected by the current detection circuit 38 as a load current. If No in step 410 (the power is on), constant current control is executed in step 411. In this case, the output generation circuit control unit 203 detects the reference signal generated by the reference signal generation unit 2041 of the dimming control unit 204 based on the dimming signal of the dimming signal generation unit 40 and the current detection circuit 26. A control signal corresponding to the comparison result with the lamp current is input. As a result, the output generation circuit control unit 203 turns on and off the field effect transistors 221 and 222 of the output generation circuit 21 at an operating frequency according to the control signal from the dimming control unit 204 to generate high-frequency alternating current, and the discharge lamp 30 Lights up. In this case, the control signal input from the dimming control unit 204 to the output generation circuit control unit 203 corresponds to the comparison result between the reference signal and the lamp current, and is subjected to feedback control. Is controlled so that the lamp current always approaches the reference signal (step 411).

  In this state, if the reference signal generated by the reference signal generation unit 2041 is varied by the dimming signal of the dimming signal generation unit 40, the control signal output from the dimming control unit 204 changes, and the discharge lamp 30 Lighting control is performed in the range from light to dimming. In this case, the output generation circuit 21 performs on / off operation of the field effect transistors 221 and 222 at an operation frequency with a duty ratio of 50% of the drive signal from the output generation circuit control unit 203. From this state, the dimming signal is generated. When the reference signal is changed by the dimming signal of the unit 40 and the control signal output from the dimming control unit 204 is changed, the duty ratio of the drive signal from the output generation circuit control unit 203 is 50% according to this change. The operating frequency is changed. As a result, the AC output supplied to the discharge lamp 30 is controlled, and the discharge lamp 30 is controlled in the lighting state in the range of all light to dimming according to the dimming signal of the dimming signal generator 40.

  When the male connector 31 of the discharge lamp 30 is disconnected from the female connector 28 in order to remove the discharge lamp 30 from the instrument body 1 while the discharge lamp 30 is lit, the interlock switch 51 is turned off, and the AC The power supply from the power supply 10 to the full-wave rectifier circuit 11 is cut off, and the output of the output generation circuit 21 is stopped. Therefore, in this state, the output of the output generation circuit 21 is stopped by forcibly turning off the power with the removal of the discharge lamp 30, so that the safety when removing the discharge lamp 30 can be ensured.

  If it is determined in step 410 that the discharge lamp 30 is lit and the power is turned off, the high-frequency alternating current of the output generation circuit 21 is stopped and the discharge lamp 30 is turned off.

  Next, the case where the male connector 33 of the LED lighting lamp 32 is connected to the female connector 28 will be described.

  Also in this case, when the male connector 33 of the LED lighting lamp 32 is connected to the female connector 28, the interlock switch 51 of the female connector 28 is turned on, and the AC power supply 10 is supplied to the full-wave rectifier circuit 11. If the LED lamp 32 is connected as a light source, V1 <VR ≦ V2 is established in step 405, and the LED lamp 32 is determined. Then, in step 413, the switch element 26 is turned off to short-circuit the DC cut capacitor 25.

  Next, it progresses to step 414 and it switches to the chopper operation | movement for lighting the LED illumination light 32. FIG. In this case, in step 414, the output voltage of the boost chopper circuit 13 is input to the output generation circuit 21. In the output generation circuit 21, one of the field effect transistors 221 and 222 is turned off by the output generation circuit control unit 203 of the control unit 20, and the other field effect transistor 221 is removed from the dimming control unit 204. It is turned on / off based on the output control signal. As a result, an output voltage (DC output) stepped down at both ends of the capacitor 24 is generated by the accumulation and release of electromagnetic energy of the inductor 23 accompanying the on / off operation of the field effect transistor 221, and the LDE lamp 32 is turned on by this output voltage. Is done.

  In step 409, the current detection circuit 38 detects the current flowing through the LDE illumination lamp 32 as a load current. If No in step 410 (the power is on), constant current control is executed in step 411. Also in this case, the output generation circuit control unit 203 receives the reference signal generated by the reference signal generation unit 2041 of the dimming control unit 204 based on the dimming signal of the dimming signal generation unit 40 and the current detection circuit 26. A control signal corresponding to the comparison result with the detected lamp current is input. As a result, the output generation circuit control unit 203 turns on / off the field effect transistor 221 of the output generation circuit 21 according to the control signal from the dimming control unit 204, and the inductor 23 associated with the on / off operation of the field effect transistor 221 As a result of the accumulation and release of the electromagnetic energy, a DC output that has been stepped down across the capacitor 24 is generated, and the LED illumination lamp 32 is turned on.

  Also in this case, the control signal input from the dimming control unit 204 to the output generation circuit control unit 203 corresponds to the comparison result between the reference signal and the lamp current, and feedback control is performed. Constant current control is performed so that the lamp current of the lamp 32 always approaches the reference signal (step 411).

  Even in this state, when the reference signal generated by the reference signal generation unit 2041 is changed by the dimming signal of the dimming signal generation unit 40, the control signal output from the dimming control unit 204 is changed, and the LED illumination lamp 32 is controlled to be lit in the range of all light to light control. In this case, the output generation circuit 21 performs the on / off operation of the field effect transistor 221 at a predetermined duty ratio input from the output generation circuit control unit 203. From this state, the output generation circuit 21 uses the dimming signal of the dimming signal generation unit 40. When the reference signal is changed and the control signal output from the dimming control unit 204 is changed, the duty ratio input from the output generation circuit control unit 203 is changed according to the change. Thereby, the direct current output supplied to the LED lighting lamp 32 is controlled, and the lighting state of the LED lighting lamp 32 is controlled in the range of all light to dimming according to the dimming signal of the dimming signal generating unit 40. .

  Further, when the male connector 33 of the LED illumination light 32 is disconnected from the female connector 28 in order to remove the LED illumination light 32 from the instrument body 1 in a state where the LED illumination light 32 is lit, the interlock switch 51 is turned off. Then, the power supply from the AC power supply 10 to the full-wave rectifier circuit 11 is cut off, and the output of the output generation circuit 21 is stopped. Therefore, even in this state, the output of the output generation circuit 21 is stopped by forcibly turning off the power together with the removal of the LED illumination lamp 32, so that the safety when removing the LED illumination lamp 32 can be ensured. .

  If it is determined in step 410 that the LED illumination lamp 32 is lit, the DC output of the output generation circuit 21 is stopped and the LED illumination lamp 32 is turned off.

  On the other hand, if it is determined in step 405 that V2 <VR, it is determined that the light source is not connected, and the process proceeds to step 406, where the output of the power supply apparatus is stopped.

  Accordingly, when the interlock switch 51 is incorporated in the female connector 28 and the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED lighting lamp 32) is connected to the female connector 28, the interlock switch 51 is thus configured. When the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED lighting lamp 32) is disconnected from the female connector 28, the interlock switch 51 is turned off to cut off the power. I tried to do it. Thereby, when removing the discharge lamp 30 (or LED illumination lamp 32) from the instrument body 1, the power supply is forcibly cut off, and the output of the output generation circuit 21 can be stopped. It is possible to ensure safety when removing the LED illumination lamp 32).

  The interlock switch 51 is turned on only when the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is securely connected to the female connector 28, and the male connector 31 of the discharge lamp 30. (Or, the male connector 33 of the LED lighting lamp 32) is immediately turned off in a state where a reliable connector connection state is not ensured by the disconnecting operation. In particular, in the case of the LED lighting lamp 32, the LED lighting lamp 32 is Even if an electric circuit may continue to be formed by the LED element 37 until it is completely removed, the power supply can be shut off at this point, so there is no problem even if the output terminal of the power supply device is touched. Improvements can be made.

  In this embodiment, the light source determination unit 202 determines whether the light source is the discharge lamp 30 or the LED illumination lamp 32, the resistance value of the filament 302 of the discharge lamp 30, and the resistance element 34 (35) provided in the LED illumination lamp 32. When the light source is determined to be the discharge lamp 30 based on the output voltage VR obtained according to the resistance value, the field effect transistors 221 and 222 of the output generation circuit 21 are changed to a half-bridge type inverter circuit. When the discharge lamp 30 is turned on by a high-frequency AC output generated by alternately turning on and off the field effect transistors 221 and 222, and the light source is determined to be the LED illumination lamp 32, the output generation circuit 21 One of the effect transistors 221 and 222 is turned off, and the other field effect is Since the step-down chopper is constituted by the transistor 221 and the LED illumination lamp 32 is lit by the direct current output generated by turning on and off the field effect transistor 221, the optimum high frequency alternating current output can be supplied to the discharge lamp 30. At the same time, an optimum and stable direct current output can be supplied also to the LED lighting lamp 32. Therefore, the LED power is converted into the direct current power by the diode bridge circuit incorporated in the conventional LED lighting lamp. Compared to the lighting device, it is possible to obtain a stable lighting operation in which the LED element does not flicker.

  In the above description, the DC cut capacitor 25 is connected in series between the capacitor 24 and the field effect transistor 222. However, the DC cut capacitor 25 is connected in series between the inductor 23 and the field effect transistor 221. Alternatively, the capacitor 24 and the field effect transistor 222 and the inductor 23 and the field effect transistor 221 may be connected in series. Also in this case, a switch element is connected to these capacitors in parallel, and when the light source is determined to be the LED illumination lamp 32, the capacitor is short-circuited by an ON operation of the switch element according to an instruction from the control unit 20.

(Second Embodiment)
In the first embodiment, an example using a half-bridge type inverter circuit has been described. However, in the second embodiment, a full-bridge type inverter circuit is used.

  FIG. 5 shows a schematic configuration of the second embodiment, and the same parts as those in FIG.

  In this case, the LED illumination lamp 32 shown in FIG. 5B is configured in exactly the same way as in FIG.

  In addition, in the output generation circuit 21 shown in FIG. 5A, a series circuit of field effect transistors 221 and 222 as switching elements and a series circuit of field effect transistors 223 and 224 are connected in parallel to the electrolytic capacitor 17. ing. Further, the field effect transistors 221 to 224 are controlled by the control unit 20 with their gates connected to the control unit 20.

  The output generation circuit 21 performs two kinds of operations in response to a control signal from the control unit 20. The first operation is a so-called full bridge type inverter circuit as an AC output means by means of field effect transistors 221 to 224. These non-adjacent field effect transistors of the full bridge configuration, here, the field effect transistors 221 and 224 and the field effect transistors 222 and 223 are paired, and these groups are alternately turned on and off to alternately turn on and off the high-frequency AC output. Is generated. In the second operation, adjacent field effect transistors having a full bridge configuration, here, the field effect transistors 221 and 222 and the field effect transistors 223 and 224 are paired, and one field effect transistor 223 is turned off. The effect transistor 224 is turned on, and one field effect transistor 222 of the other set of field effect transistors 221 and 222 is turned off (in this case, the field effect transistor 222 is operated as a free-wheeling diode by a body diode). The other field effect transistor element 221 constitutes a step-down chopper, and a chopper output is generated by turning on / off the field effect transistor 221. Also in this case, a synchronous rectification step-down chopper that generates a DC output by synchronizing with the field effect transistor 222 may be configured.

  In the output generation circuit 21, a series circuit of an inductor 23 as a ballast choke, a capacitor 24, and a DC cut capacitor 25 is connected between a connection point between the field effect transistors 221 and 222 and a connection point between the field effect transistors 223 and 224. Has been. A switch element 26 is connected to the capacitor 25 in parallel. The switch element 26 is turned on / off in response to an instruction from the control unit 20 to open / close the capacitor 25.

  Also in this case, when the output generation circuit 21 operates as an inverter having a full bridge configuration, the high frequency AC output generated by alternately turning on / off the pair of field effect transistors 221 and 224 and the pair of field effect transistors 222 and 223 is used. Thus, the inductor 23 and the capacitor 24 are operated as a resonance circuit. Further, when the output generation circuit 21 operates as a step-down chopper, a DC output that is stepped down at both ends of the capacitor 24 is generated by the accumulation and release of electromagnetic energy in the inductor 23 that accompanies the on / off of the field effect transistor 221.

  The female connector 28 is turned on when the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is connected to the female connector 28, and the male connector 31 of the discharge lamp 30 is connected to the female connector 28. An interlock switch 61 that incorporates an off operation when the male connector 33 of the LED lighting lamp 32 is disconnected is incorporated. The interlock switch 61 is connected in series between the AC power supply 10 and the full-wave rectifier circuit 11, and the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is connected to the female connector 28. The AC power supply 10 is connected to the full-wave rectifier circuit 11 by the ON operation, and the AC power supply 10 is fully connected by the OFF operation in which the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED lighting lamp 32) is disconnected from the female connector 28. The power supply is cut off from the wave rectification circuit 11 and the output of the output generation circuit 21 is stopped.

  The rest of the configuration is the same as in FIG.

  The output generation circuit control unit 203 first causes the output generation circuit 21 to perform an inverter operation immediately after the power is turned on. When the light source is determined to be the discharge lamp 30 from the determination result of the light source determination unit 202, the inverter operation of the output generation circuit 21 is performed. Continue. The output generation circuit control unit 203 operates the output generation circuit 21 as a step-down chopper when it is determined that the light source is the LED illumination lamp 32.

  In this case, when the output generation circuit control unit 203 causes the output generation circuit 21 to perform an inverter operation, switching elements that are not adjacent to each other in a full bridge configuration, here, the field effect transistors 221 and 224 and the field effect transistors 222 and 223 are assembled. The high-frequency AC output is generated by alternately turning on and off these groups. When the output generation circuit control unit 203 causes the output generation circuit 21 to operate as a step-down chopper, adjacent full-bridge field effect transistors, here, the field effect transistors 221 and 222 and the field effect transistors 223 and 224 are assembled. One field effect transistor 223 is turned off, the field effect transistor 224 is turned on, one field effect transistor 222 of the other set of field effect transistors 221 and 222 is turned off, and the other field effect transistor element 221 is turned on / off. To generate a chopper output.

  Other operations are the same as those in FIG.

  Therefore, even in this case, the same effect as that of the first embodiment can be obtained. That is, according to the second embodiment, when the discharge lamp 30 is lit, the male connector 31 of the discharge lamp 30 is disconnected from the female connector 28 in order to remove the discharge lamp 30 from the instrument body 1. The interlock switch 61 is turned off, and the power supply from the AC power supply 10 to the full-wave rectifier circuit 11 is cut off. Therefore, in this state, the power supply is forcibly shut off along with the removal of the discharge lamp 30, so that safety when removing the discharge lamp 30 can be ensured. Similarly, when the male connector 33 of the LED illumination light 32 is disconnected from the female connector 28 in order to remove the LED illumination light 32 from the instrument body 1 with the LED illumination light 32 lit, the interlock switch 61 is turned on. The power supply from the AC power supply 10 to the full-wave rectifier circuit 11 is cut off, and the output of the output generation circuit 21 is stopped. Therefore, it is possible to ensure safety when removing the LED lighting lamp 32. .

  As described above, in the second embodiment, the interlock switch 61 is incorporated in the female connector 28, and the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED illumination lamp 32) is connected to the female connector 28. When the interlock switch 61 is turned on so that the power can be connected, and when the male connector 31 of the discharge lamp 30 (or the male connector 33 of the LED lighting lamp 32) is disconnected from the female connector 28, the interlock switch 61 is turned off. Thus, the power supply is shut off, so that the safety when removing the discharge lamp 30 (or the LED illumination lamp 32) from the instrument body 1 can be ensured.

  As shown in FIG. 5A, a power detection circuit 41 having a resistance element 411 is connected in series to the field effect transistors 221 and 222 of the output generation circuit 21, and the voltage generated in the resistance element 411 is discharged to the discharge lamp 30 ( Alternatively, if it is detected as the load power of the LED illumination lamp 32), for example, when the light source is the LED illumination lamp 32, the load current detected by the current detection circuit 38 and the reference generated by the reference signal generation unit 2041. Based on the signal comparison result, the LED illumination lamp 32 is controlled at a constant current. On the other hand, when the light source is the discharge lamp 30, the load power detected by the power detection circuit 41 and the reference signal generated by the reference signal generation unit 2041. Based on the comparison result, the discharge lamp 30 can be controlled at a constant power.

(Modification)
Although the general discharge lamp 30 has been described in the second embodiment, the present invention can also be applied to a high-pressure discharge lamp (HID lamp). In this case, the light source determination unit 202 of the control unit 20 determines whether the light source is the HID lamp or the LED illumination lamp from the current state at the start of the HID lamp and the LED illumination lamp detected by the current detection circuit 38. That is, the lamp voltage VL1 at the time of starting the HID lamp becomes a constant level as shown in FIG. 6A by the inverter operation of the output generation circuit 21, and after a predetermined time, a high voltage pulse generated by the operation of the igniter When the voltage Vp is applied and the discharge of the HID lamp is started by the application of the high voltage pulse voltage Vp, the lamp current IL1 shown in FIG. 6B starts to flow. On the other hand, the LED illumination lamp 32 starts to flow a current If as shown in FIG. Therefore, the light source determination unit 202 determines that the light source is an LED illuminating lamp by detecting the current If that starts to flow immediately after the start from the output of the current detection circuit 38, and is delayed for a predetermined time from the start (HID By detecting the lamp current IL1 shown in FIG. 6B, which starts to flow after the lamp discharge starts, from the output of the current detection circuit 38, it is determined that the light source is an HID lamp.

  Even if it does in this way, the effect similar to 2nd Embodiment can be acquired.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  FIG. 7 shows a schematic configuration of the main part of the third embodiment, and the same parts as those in FIG. In this case, the output generation circuit 21 includes a DC-cut capacitor 52, an inductor 53 as a ballast choke, a capacitor 54, and a resistance element 55 in parallel with the field-effect transistor 221 of the field-effect transistors 221 and 222 that are half-bridge connected. A series circuit is connected. The inductor 53 and the capacitor 54 operate as a resonance circuit with respect to a high-frequency AC output generated by alternately turning on and off the field effect transistors 221 and 222.

  An insulating transformer 56 is connected to the capacitor 54. The insulating transformer 56 has a primary winding 56a connected in parallel to the capacitor 54 and a secondary winding 56b insulated from the primary winding 56a. The secondary winding 56b is connected to connection terminals 57a and 57b of a female connector 57 as connection means.

  An LED illumination light 59 as a load is connected to the female connector 57. The LED illumination lamp 59 is integrally provided with a male connector 58 as connection means. The male connector 58 has connection terminals 58a and 58b corresponding to the connection terminals 57a and 57b of the female connector 57, and the connection terminals 58a and 58b are attached to the female connector 57 by attaching and detaching the LED illumination lamp 59 to / from an unillustrated instrument. The connection terminals 57a and 57b of 57 can be connected or disconnected.

  Between the connection terminals 58a and 58b of the male connector 58, one or a plurality of LED elements 60 connected in series as a semiconductor light emitting element are connected via an AC / DC converter 591. Here, the AC / DC converter 591 converts an AC output output from the secondary winding 56b side of the insulation transformer 56 into a DC output.

  In FIG. 7, the configuration other than the main part is omitted.

  In such a configuration, when the LED illuminating lamp 59 is mounted on a tool (not shown), the male connector 58 of the LED illuminating lamp 59 is connected to the female connector 57 on the output generation circuit 21 side.

  In this state, when the field effect transistors 221 and 222 are alternately turned on and off, and a high frequency AC output is generated between the drain and source of the field effect transistor 222, the AC output is passed through an insulating transformer via the resonance circuit of the inductor 53 and the capacitor 54. 56 is input to the primary winding 56a, and an AC output is generated from the secondary winding 56b. The AC output from the secondary winding 56b is converted into a DC output via the AC / DC converter 591 and supplied to the LED element 60, and the LED element 60 is lit.

  When the LDE illumination lamp 59 is removed from the instrument from this state, the male connector 58 of the LED illumination lamp 59 is disconnected from the female connector 57 on the output generation circuit 21 side. In this case, the AC output output from the output generation circuit 21 is supplied to the LED illumination lamp 59 via the insulation transformer 56, and the female connector 57 side is insulated from the power supply side. The influence of the power supply on the side can be eliminated. Thus, when the LED illumination lamp 59 is removed from the instrument and the male connector 58 is disconnected from the female connector 57 on the output generation circuit 21 side while the LED element 60 is lit, the operator connects the female connector 57. Even if the terminals 57a and 57b are touched, the safety at this time can be reliably ensured.

  In the above description, an example in which the LED illumination lamp 59 is connected as a load has been described. However, as described in the first embodiment, a discharge lamp can be connected instead of the LED illumination lamp 59.

(Fourth embodiment)
In the first and second embodiments, the LED illumination lamp 32 can be connected to the output generation circuit 21 of the power supply device by the connector 30, and when the LED illumination lamp 32 is disconnected from the output generation circuit 21, the interlock switch 51 (61) cuts off the power supply to the output generation circuit 21, but in the fourth embodiment, when the LED lighting is disconnected from the power supply device, the LED element lighting circuit in the LED lighting is shown. Was cut off.

  FIG. 8 shows a schematic configuration of the LED illumination lamp according to the fourth embodiment.

  In FIG. 8, 62 is an LED illuminating lamp, and this LED illuminating lamp 62 integrally has a male connector 63 as a connecting means. This male connector 63 can be connected to or disconnected from a female connector 67 which is a connecting means of a power supply device 84 as an output generating means by attaching and detaching the LED illumination lamp 62 to an unillustrated instrument. The male connector 63 has connection terminals 63a and 63b. Between the connection terminals 63a and 63b, one or a plurality of LED elements 64 connected in series as semiconductor light emitting elements and a switching element as switching means. A series circuit 65 and an illuminating lamp removal detecting unit 66 are connected to each other. The illuminating lamp removal detection unit 66 constitutes a lighting circuit cut-off means together with the switching element 65, and operates by detecting an output voltage generated between the connection terminals 63a and 63b by the output of the power supply device 84. That is, when the male connector 63 of the LED lighting lamp 62 is connected to the female connector 67 of the power supply device 84, the illuminating lamp removal detecting unit 66 detects a voltage generated between the connection terminals 63a and 63b of the male connector 63. The switching element 65 is turned on to form a lighting circuit for the LED element 64, the male connector 63 of the LED illuminating lamp 62 is disconnected from the female connector 67 of the power supply device 84, and the voltage between the connection terminals 63 a and 63 b of the male connector 63 When there is no more, the switching element 65 is turned off to interrupt the lighting circuit of the LED element 64.

  On the other hand, in such a power supply device 84 that lights the LED lighting 62, an input terminal of a full-wave rectifier circuit 69 is connected to an AC power supply 68 that is a commercial power supply (not shown). The full wave rectification circuit 69 generates an output obtained by full wave rectification of the AC power from the AC power supply 68.

  A boost chopper circuit 70 is connected to the full wave rectifier circuit 69. In this step-up chopper circuit 70, a series circuit of a first inductor 71 constituting a step-up transformer and a field effect transistor 72 serving as a switching element is connected between the positive and negative output terminals of a full-wave rectifier circuit 69. An electrolytic capacitor 74 which is a smoothing capacitor is connected in parallel to 72 through a flywheel diode 73 having the illustrated polarity. A series circuit of resistors 75 and 76 is connected to both ends of the electrolytic capacitor 74 as voltage detection means. The resistors 75 and 76 generate a divided voltage from the output of the electrolytic capacitor 74, and output the terminal voltage of the resistor 76 to the control unit 77. The field effect transistor 72 is turned on / off based on a comparison result between the terminal voltage of the resistor 76 in the control unit 77 and a reference voltage prepared in advance. The first inductor 71 generates a boosted output in the electrolytic capacitor 74 via the flywheel diode 73 due to the accumulation and release of electromagnetic energy accompanying the on / off operation of the field effect transistor 72. The control unit 77 will be described later.

  The step-up chopper circuit 70 is connected to a step-down chopper circuit 78 as output generating means. In the step-down chopper circuit 78, a series circuit of a field effect transistor 79 as a switching element, a flywheel diode 80, and a resistance element 81 as a load current detecting means is connected to both ends of an electrolytic capacitor 74. A series circuit of a second inductor 82 and a smoothing capacitor 83 is connected to both ends of the flywheel diode 80. The resistance element 81 detects a load current flowing through the LDE illumination lamp 62 and outputs this detection output to the control unit 77.

  The field effect transistor 79 is turned on / off based on a comparison result between a detection output corresponding to the load current detected by the resistor 81 in the control unit 77 and a preset reference signal VF, and a current flowing through the LDE lamp 62 is obtained. Control. The second inductor 82 generates a DC output that is stepped down across the capacitor 83 due to the accumulation and release of electromagnetic energy accompanying the on / off operation of the field effect transistor 79.

  The female connector 67 described above is connected to both ends of the capacitor 83. The female connector 67 has connection terminals 67a and 67b, and when the LED illumination lamp 62 is mounted on a tool (not shown), the connection terminals 63a and 63b of the male connector 63 of the LED illumination lamp 62 are connected to each other. The

  The control unit 77 controls the entire power supply apparatus, and includes a power supply output control unit 771 and a constant current control unit 772. The power supply output control unit 771 stores a reference voltage (not shown), and controls the on / off operation of the field effect transistor 72 based on the comparison result between the reference voltage and the terminal voltage of the resistor 76. A boosted output voltage is generated across the electrolytic capacitor 74 by the accumulation and release of electromagnetic energy in the first inductor 71 accompanying the on / off operation. The constant current control unit 772 prepares a preset reference signal VF, controls the switching drive of the field effect transistor 79 based on the comparison result with the load current detected by the resistance element 81, and the current flowing through the LDE lamp 64 Is controlled to a constant current.

  In such a configuration, it is assumed that the LDE illumination lamp 64 is mounted on the instrument and connected to the female connector 67 of the power supply device 84 via the male connector 63.

  When a power switch (not shown) is turned on in this state, the AC power of the AC power supply 68 is full-wave rectified by the full-wave rectifier circuit 69 and supplied to the boost chopper circuit 70. In the step-up chopper circuit 70, the field effect transistor 72 is turned on / off based on a comparison result between the terminal voltage of the resistor 76 and a reference voltage prepared in advance in the power supply output control unit 771, and the field effect transistor 72 is turned on / off. Accompanying the storage and release of the electromagnetic energy of the first inductor 71, a boosted output voltage is generated in the electrolytic capacitor 74 via the flywheel diode 73.

  The output voltage of the step-up chopper circuit 70 is supplied to the step-down chopper circuit 78.

  In the step-down chopper circuit 78, the field effect transistor 79 is turned on / off by the output of the constant current control unit 772, and the output is stepped down to the capacitor 83 via the flywheel diode 80 by the accumulation and release of electromagnetic energy of the second inductor 82. Voltage is generated. Then, the illuminating lamp removal detection unit 66 operates by detecting the voltage generated between the connection terminals 63a and 63b of the male connector 63, and turns on the switching element 65. Thereby, the lighting electric circuit of the LED element 64 is formed, and the LDE illumination lamp 64 is turned on.

  When the LDE illumination lamp 64 is removed from the fixture from this state, the male connector 63 of the LED illumination lamp 62 is disconnected from the female connector 67 of the power supply device 84. Then, since the voltage between the connection terminals 63a and 63b of the male connector 63 is lost, the illuminating lamp removal detecting unit 66 turns off the switching element 65 and interrupts the lighting circuit of the LED element 64.

  Accordingly, in this case, the LDE illumination lamp 64 is provided with the illumination lamp removal detecting section 66 that constitutes the lighting circuit interruption means, and the male connector 63 of the LED illumination lamp 62 is connected to the power supply device by attaching the LDE illumination lamp 64 to the fixture. When connected to the female connector 67 of 84, the switching element 65 is turned on by the illuminating lamp removal detecting section 66 to form a lighting circuit for the LED element 64, and the LED illuminating lamp 62 is removed by removing the LDE illuminating lamp 64 from the fixture. When the male connector 63 is disconnected from the female connector 67 of the power supply device 84, the switching element 65 is turned off by the illuminating lamp removal detection unit 66 so that the lighting circuit of the LED element 64 is cut off. When the LED illuminating lamp 62 is removed from the instrument from the state in which the connection is made, the operator can connect the connection terminal 63a of the male connector 63, Even if the touch 3b, that is already lit path is blocked, it is possible to reliably ensure the safety of this time.

(Fifth embodiment)
FIG. 9 shows a schematic configuration of an LED illuminating lamp according to a fifth embodiment of the present invention, and the same parts as those in FIG.

  In this case, between the connection terminals 63a and 63b of the male connector 63 of the LED lighting lamp 62, an LED element 64, a series circuit of a field effect transistor 85 of a semiconductor element as a switching means, and an illumination lamp removal detecting section 66 are connected. ing. When the male connector 63 of the LED lighting lamp 62 is connected to the female connector 67 of the power supply device 84, the illuminating lamp removal detection unit 66 detects the voltage generated between the connection terminals 63a and 63b of the male connector 63, and thereby the field effect. A drive signal is applied to the gate of the transistor 85 to turn on the field effect transistor 85 to form a lighting circuit for the LED element 64. Also, the male connector 63 of the LED lighting lamp 62 is disconnected from the female connector 67 of the power supply device 84. When the voltage between the connection terminals 63a and 63b of the male connector 63 disappears, the drive signal to the gate of the field effect transistor 85 is stopped and the field effect transistor 85 is turned off to cut off the lighting circuit of the LED element 64.

  Even if it does in this way, since the effect similar to 5th Embodiment is acquired and also the field effect transistor 85 is used as a switching means which interrupts | blocks a lighting circuit, the LED illumination light 84 is removed from an instrument, and it is a male When the connector 58 is disconnected from the female connector 57 on the output generation circuit 21 side, the lighting electric circuit can be interrupted at high speed, and further safety can be obtained.

(Sixth embodiment)
FIG. 10 shows a schematic configuration of an LED illuminating lamp according to a sixth embodiment of the present invention, and the same parts as those in FIG.

  In this case, between the connection terminals 63a and 63b of the male connector 63 of the LED illumination lamp 62, the LED element 64 and a series circuit of the relay 86 as a switching element and the illumination lamp removal detection unit 66 are respectively connected. The relay 86 has an exciting coil 861 and a contact 862 that is turned on by energizing the exciting coil 861. Further, when the male connector 63 of the LED illuminating lamp 62 is connected to the female connector 67 of the power supply device 84, the illuminating lamp removal detecting unit 66 detects a voltage generated between the connection terminals 63a and 63b of the male connector 63. An energizing signal is applied to the exciting coil 861 of the relay 86 to turn on the contact 862 to form a lighting circuit for the LED element 64, and the male connector 63 of the LED illumination lamp 62 is disconnected from the female connector 67 of the power supply device 84. When the voltage between the connection terminals 63a and 63b of the male connector 63 disappears, the energizing signal to the exciting coil 861 is stopped, the contact 862 is turned off, and the lighting circuit of the LED element 64 is interrupted.

  Even if it does in this way, the effect similar to 5th Embodiment can be acquired.

  In the LED lighting lamps of the fourth to sixth embodiments described above, the power supply device 84 that generates a direct current output is connected as the output generating means, but a high frequency like an inverter is output as the output generating means. It is also possible to use a high-frequency power source or a commercial power source, and a high-frequency power source connected to the power source via a connecting means or a commercial power source direct connection type LED lighting. In this case, it can be realized by providing an AC / DC conversion circuit element for converting an AC output into a DC output on the LED illumination lamp side.

(Seventh embodiment)
FIG. 11 shows a schematic configuration of an LED illuminating lamp according to a seventh embodiment of the present invention.

  In FIG. 11, 87 is an AC power source comprising a commercial power source (not shown), and this AC power source 87 is connected to connection terminals 88a and 88b of a female connector 88 as connection means. On the other hand, 89 is an LED illuminating lamp, and this LED illuminating lamp 89 integrally has a male connector 90 as a connecting means. The male connector 90 has connection terminals 90a and 90b, and can be connected to or disconnected from the connection terminals 88a and 88b of the female connector 88 of the AC power supply 87 by attaching and detaching the LED lighting lamp 89 to / from an unillustrated instrument.

  In the LED lighting 89, the input terminal of the full-wave rectifier circuit 91 is connected between the connection terminals 90 a and 90 b of the male connector 90. The full wave rectification circuit 91 generates an output obtained by full wave rectification of the AC power from the AC power supply 87. A smoothing capacitor 92 is connected between the positive and negative output terminals of the full-wave rectifier circuit 91. The smoothing capacitor 92 smoothes the output of the full wave rectifier circuit 91 and generates a DC voltage.

  An insulating transformer 93 is connected to the smoothing capacitor 92. The insulating transformer 93 has a primary winding 93a and a secondary winding 93b insulated from the primary winding 93a, and the primary winding 93a is passed through an NPN transistor 94 as a switching element. Are connected to both ends of the smoothing capacitor 92. In this case, the NPN transistor 94 has a collector connected to the primary winding 93 a and an emitter connected to the negative output terminal of the full-wave rectifier circuit 91.

  Between the secondary winding 93b of the insulating transformer 93, a series circuit of a diode 95 and a capacitor 96 of the illustrated polarity is connected as a rectifying means. The diode 95 rectifies the output of the secondary winding 93b, and the capacitor 96 smoothes the pulsating current output from the diode 95 to generate a DC voltage. One or a plurality of LED elements 97 connected in series as semiconductor light emitting elements are connected to the capacitor 96.

  On the other hand, a control circuit 98 is connected to a connection point between the diode 95 and the capacitor 96 via a photocoupler 99 which is an insulating means. The control circuit 98 applies a drive signal to the base of the NPN transistor 94 in synchronization with the pulsating current output from the secondary winding 93b via the diode 95, and turns the NPN transistor 94 on and off.

  In such a configuration, it is assumed that the LDE illumination lamp 89 is mounted on the instrument and connected to the female connector 88 of the AC power supply 87 via the male connector 90.

  When a power switch (not shown) is turned on in this state, the AC power of the AC power supply 87 is full-wave rectified by the full-wave rectifier circuit 91, and a smoothed DC voltage is generated in the smoothing capacitor 92.

  In this state, the control circuit 98 starts switching of the NPN transistor 94. First, when the NPN transistor 94 is turned on, a current flows through the primary winding 93a of the insulating transformer 93 and the NPN transistor 94. When the NPN transistor 94 is turned off, the secondary winding 93b has 1 A back electromotive force based on the energy accumulated by the current flowing to the side of the next winding 93 a is generated, and a flyback current flows through the diode 95 and the capacitor 96. In the same manner, when the NPN transistor 94 is turned on and off by the control circuit 98 in the same manner, a flyback current continues to flow through the secondary winding 93b. A voltage is generated and the LED element 97 is turned on.

  From this state, when the LDE illumination lamp 89 is removed from the fixture, the male connector 90 of the LED illumination lamp 89 is disconnected from the female connector 88 of the AC power supply 87. In this case, since the output from the power supply side is supplied to the LED element 97 via the insulation transformer 93 and the LED element 97 is insulated from the power supply side, the influence of the power supply on the LED element 97 side is affected. You can do it all. Accordingly, even when the operator touches the lighting circuit of the LED element 97 when removing the LED lighting lamp 89 from the instrument while the LED element 97 is lit, the safety at this time is ensured. Can be secured.

  In addition, this invention is not limited to the said embodiment, In the implementation stage, it can change variously in the range which does not change the summary. For example, in the above-described embodiment, it is automatically determined whether the light source is a discharge lamp or an LED illumination lamp, but a manual changeover switch can also be used. In this case, the changeover switch is provided in the instrument main body 1 described with reference to FIG. 1 and is manually switched to a corresponding position by a discharge lamp or an LED illumination lamp attached to the instrument main body 1. In the above-described embodiment, the example of the power supply device for regular lighting in which the discharge lamp 30 or the LED illumination lamp 32 can be turned on as the light source has been described. However, for example, the power supply device for emergency lighting can be applied. In this case, a storage battery is built in the power supply device, and when the AC power supply 10 of the commercial power supply fails, the power supply is switched from the AC power supply 10 to the storage battery, the power supply device is driven using this storage battery as a power supply, and the discharge lamp 30 Alternatively, the LED illumination lamp 32 is turned on. Furthermore, in the above-described embodiment, when the discharge lamp 30 (or the LED illumination lamp 32) is disconnected from the female connector of the power supply device, the interlock switch is turned off to shut off the power supply. When the discharge lamp 30 (or the LED illumination lamp 32) is disconnected from the connector, the interlock switch may be turned on to shut off the power supply. Furthermore, in the above-described embodiment, the example in which the interlock switch is operated to forcibly shut off the power supply when the discharge lamp or the LED illumination lamp is removed from the instrument body has been described. When the lamp or LED illuminating lamp is removed, this state is detected, for example, the output of the output generation circuit 21 is forcibly stopped within 0.1 seconds, or the output generation circuit side of the power supply device is made insulative. In addition, it is also conceivable to ensure safety when removing the discharge lamp or the LED illumination lamp. Further, in the above-described embodiment, the power supply device that generates AC output and DC output has been described. However, the present invention can also be applied to a power supply device that generates AC output or DC output.

  Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. If the above effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Instrument main body, 2.3 ... Discharge lamp 4 ... Sade, 100 ... Power supply device, 10 ... AC power supply,
DESCRIPTION OF SYMBOLS 11 ... Full wave rectifier circuit, 13 ... Boost chopper circuit 20 ... Control circuit, 201 ... Boost chopper circuit control part,
202 ... Light source determination unit, 203 ... Output generation circuit control unit,
204: Dimming control unit, 205 ... Delay control unit,
206 ... energization time counter, 21 ... output generation circuit,
DESCRIPTION OF SYMBOLS 28 ... Female connector 31, 33 ... Male connector 30 ... Discharge lamp, 32 ... LED illumination light 38 ... Current detection circuit, 40 ... Dimming signal generation part, 41 ... Power detection circuit,
51, 61 ... Interlock switch 56 ... Insulating transformer, 62, 89 ... LED lighting,
65 ... switching element, 66 ... illuminating lamp removal detector,

Claims (7)

Output generating means for generating an AC output and / or a DC output from a power source;
Connection means for enabling connection of a light source comprising a semiconductor light emitting element that is turned on by an output generated by the output generation means;
Output blocking means for enabling supply of power to the output generating means when the light source connected to the connecting means is disconnected;
A power supply device comprising: Output generating means for generating AC output from a power source;
An isolation transformer having an output side insulated from an input side to which an AC output is given from the output generation means;
Connecting means for detachably connecting a light source comprising a semiconductor light emitting element that is turned on by an output generated from an output side of the insulating transformer;
A power supply device comprising: The connection means is further connectable with a light source comprising a discharge lamp;
Light source determination means for determining whether the light source connected to the connection means is a discharge lamp or a semiconductor light emitting element;
Control means for controlling the output generation means to generate an alternating current output or a direct current output based on the determination result of the light source determination means;
The power supply device according to claim 1, further comprising: An LED element of the light source;
Connection means for enabling connection of the LED element that is lit by an output generated by the output generation means to an output generation means for generating an alternating current output or a direct current output;
Lighting circuit cut-off means for enabling the lighting circuit of the LED element to be cut off when the LED element connected to the connection means is disconnected;
LED lighting characterized by comprising. Connection means for enabling output generation means for generating an alternating current output by power from the power supply to the power supply;
An isolation transformer having an output side insulated from an input side to which an AC output is given from the output generation means;
An LED element of a light source that is turned on by an output generated from the output side of the isolation transformer;
LED lighting characterized by comprising. An illumination fixture comprising: the power supply device according to any one of claims 1 to 3; and an appliance body having the power supply device. An illumination fixture comprising: the LED illumination lamp according to claim 4; and an appliance body having the LED illumination lamp.

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