CN101990341A - Power supply device and lighting fixture - Google Patents

Abstract

The present invention relates to a power supply device and a lighting fixture capable of supplying an optimal and stable AC output or DC output to a discharge lamp or an LED element as a light source. Through the light source determination unit 202 of the control unit 20, it is determined whether the light source is the discharge lamp 30 or the LED lighting lamp based on the resistance value of the filament 302 of the discharge lamp 30 and the resistance value of the resistance element 34 (35) provided in the LED lighting lamp 32. 32. According to the judgment result, if it is judged that the light source is the discharge lamp 30, then an inverter circuit is formed by the output generating circuit 21 and a high-frequency AC output is supplied to the discharge lamp 30; if it is judged that the light source is the LED lighting lamp 32, then by This output generating circuit 21 constitutes a step-down chopper, and supplies a DC output to the LED lighting lamp 32 .

Description

Power supply units and lighting fixtures

technical field

The present invention relates to a discharge lamp that can be turned on as a light source, in particular to a power supply device and lighting fixture for semiconductor light-emitting elements such as light-emitting diodes (LED (Light Emitting Diode) elements).

Background technique

Conventionally, among power supply devices, there is known a power supply device that turns on a discharge lamp such as a fluorescent lamp as a light source. The power supply device is an inverter-type power supply device using an inverter circuit, and lights a discharge lamp by controlling the switching cycle (operating frequency) of switching elements constituting the inverter circuit.

On the other hand, recently, LED lighting lamps using LED elements as light sources have been put into practical use, and the industry is also considering a kind of LED lighting lamp that uses this kind of LED lighting lamp instead of a discharge lamp and can use an inverter-type power supply device to light up this kind of LED. Illuminating device of an illuminating lamp (Patent Document 1).

[Patent Document 1] Japanese Patent Laid-Open No. 2008-103304

However, according to Patent Document 1, an inverter-type power supply device for lighting a discharge lamp is directly used as a power supply device, and the high-frequency AC power output from the power supply device is converted into a high-frequency AC power by a diode bridge circuit incorporated in the LED lighting lamp. Since the LED element is turned on with DC power, a stable DC output cannot be ensured, and flickering may occur in the LED element. In addition, due to the complex circuit configuration such as a plurality of diode bridge circuits assembled inside the LED lighting lamp, the LED lighting lamp is expensive in terms of price. If a plurality of such expensive LED lighting lamps are installed, there are also economical problems Unfavorable question.

It can be seen that the above-mentioned existing power supply device obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently. Therefore, how to create a power supply device and a lighting device with a new structure has also become a goal that the current industry needs to improve.

Contents of the invention

The purpose of the present invention is to overcome the defects of existing power supply devices, and provide a new structure of power supply devices and lighting fixtures. The technical problem to be solved is to make it possible to connect discharge lamps and semiconductor light emitting elements as light sources. Provide the best and stable AC output or DC output.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a power supply device proposed by the present invention, it includes: an output generating mechanism that generates an AC output and a DC output; a light source that is lit by the output generated by the output generating mechanism; a light source judging mechanism that judges that the light source is a discharge The lamp is also a semiconductor light emitting element; and a control means controls to generate an AC output or a DC output from the output generating means based on a determination result of the light source determination means.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the above-mentioned power supply device, wherein the output generating means has an inverter circuit, and the inverter circuit constitutes half of the first and second switching means including a field effect transistor or a switching part in which a diode is connected in parallel to the switching element. In the bridge, the control means alternately turns on and off the switching elements of the first and second switching means of the output generating means to generate an AC output, turns on and off the switching elements of the first switching means, and turns all The switching elements of the second switching mechanism are closed or synchronized using the second switching mechanism, thereby generating a DC output.

In the above-mentioned power supply device, wherein the output generating means has an inverter circuit, and the inverter circuit constitutes all the first to fourth switching means including field effect transistors or switching parts with diodes connected in parallel to the switching elements. bridge, wherein the control means alternately turns on and off the switching elements of the non-adjacent first and fourth switching mechanism groups and the switching elements of the second and third switching mechanism groups constituted by the full bridge to generate AC output, the switching elements of the third switching mechanism among the adjacent third and fourth switching mechanisms constituted by the full bridge are closed, and the switching elements of the fourth switching mechanism are opened, and the switching elements of the first switching mechanism are turned on. Turning ON/OFF, and turning off the switching element of the second switching mechanism or synchronizing using the second switching mechanism, thereby generating a DC output.

In the aforementioned power supply device, the light source judging means judges the light source based on a filament resistance of the discharge lamp and a resistance value of a resistance element connected to the semiconductor light emitting element corresponding to the filament resistance.

In the above-mentioned power supply device, the light source judging means judges the light source based on the rising state of the voltage or current when the discharge lamp and the semiconductor light-emitting element are activated.

The aforementioned power supply device, wherein said output generating mechanism includes: an impedance element for direct current cut-off, connected to the output side of said inverter circuit; The impedance element is shorted.

The purpose of the present invention and the solution to its technical problem also adopt the following technical solutions to achieve. A lighting appliance according to the present invention includes: the power supply device, and a fixture body with the power supply device.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. It can be seen from the above technical solutions that the main technical content of the present invention is as follows: the output generating mechanism generates AC output and DC output; the light source is lit by the output generated by the output generating mechanism; the light source judging mechanism judges whether the light source is The discharge lamp is also a semiconductor light emitting element; and a control unit that performs control to generate an AC output or a DC output from the output generation unit based on the determination result of the light source determination unit, and a device main body having the power supply device.

By virtue of the above-mentioned technical solution, the power supply device and lighting fixture of the present invention have at least the following advantages and beneficial effects: According to the invention described in the technical solution 1 of the present invention, if it is determined that the light source is a discharge lamp, then the discharge lamp can be supplied with the best high On the other hand, if it is determined that the light source is a semiconductor light emitting element, then an optimal and stable DC output can be supplied to the semiconductor light emitting element.

According to the invention described in claim 2 of the present invention, an inverter circuit configured as a half bridge can be used as an output generating mechanism to generate an optimal AC output for a discharge lamp and an optimal and stable DC output for a semiconductor light emitting element. .

According to the invention described in the third aspect of the present invention, an inverter circuit configured as a full bridge can be used as an output generating mechanism to generate an optimal AC output for a discharge lamp and an optimal and stable DC output for a semiconductor light emitting element. .

According to the invention described in the technical proposals 4 and 5 of the present invention, it is possible to accurately determine whether the light source is a discharge lamp or a semiconductor light emitting element, and it is possible to supply an optimal AC output to the discharge lamp, and to supply an optimal and stable direct current to the semiconductor light emitting element. output.

According to the invention described in claim 6 of the present invention, the DC output to the semiconductor light emitting element can be stably supplied by short-circuiting the capacitor for DC cutoff by generating the DC output of the output generating means.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a perspective view of a lighting fixture to which a power supply device according to a first embodiment of the present invention is applied.

Fig. 2 is a diagram showing a schematic configuration of a power supply device according to the first embodiment.

Fig. 3 is a diagram showing a schematic configuration of a dimming control unit used in the first embodiment.

Fig. 4 is a flowchart for explaining the operation of the first embodiment.

5 is a diagram showing a schematic configuration of a power supply unit according to a second embodiment of the present invention.

Fig. 6 is a diagram showing voltage and current waveforms at the start of the discharge lamp and the LED lighting lamp according to the second embodiment.

7 is a diagram showing a schematic configuration of a power supply unit according to a third embodiment of the present invention.

Fig. 8 is a diagram showing voltage and current waveforms at the time of startup of the HID lamp and the LED lighting lamp according to a modified example of the third embodiment.

1: Apparatus body 1a: Abutment

2, 3: Discharge lamp 4: Lampshade

10: AC power supply 11, 36: Full-wave rectification circuit

12, 24, 25, 27, 29: Capacitor 13: Boost chopper circuit

14, 23: Inductors 15, 221, 222, 223, 224: Field effect transistors

16: Freewheeling diode 17: Electrolytic capacitor

18, 19: Resistor 20: Control circuit

21: Output generating circuit 26: Switching element

28: Female connector

28a, 28b, 28c, 28d, 31a, 31b, 31c, 31d, 33a, 33b, 33c, 33d: Connection terminals

30: Discharge lamp 31, 33: Male connector

32: LED lighting 34, 35, 39, 381, 411: resistance element

37: LED component 38: Current detection circuit

40: Dimming signal generation unit 41: Power detection circuit

100: Power supply unit 201: Boost chopper circuit control unit

202: Light source determination unit 203: Output generation circuit control unit

204: Dimming control department 205: Delay control department

206: Power-on time counter 231: 1st auxiliary coil

232: Second auxiliary coil 301, 302: Filament

382, 383: Diodes 2041: Reference signal generation unit

2042: Comparator P: Connection point

VL, VL1: lamp voltage IL, IL1: lamp current

Vf: forward voltage If: current

VP: pulse voltage Vcc: reference voltage

Detailed ways

In order to further explain the technical means and effects that the present invention adopts to achieve the intended invention purpose, the power supply device and lighting fixtures proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments.

Its specific implementation, structure, feature and effect thereof are described in detail as follows.

(first embodiment)

First, a lighting fixture to which the power supply device of the present invention is applied will be briefly described.

In FIG. 1, 1 is an instrument main body, and this instrument main body 1 has a disc-shaped base 1a. And on this base 1a, ring-shaped discharge lamps 2, 3 having different diameters as light sources are arranged concentrically, and a milky white shade (shade) is attached to cover the discharge lamps 2, 3. )4. Here, the discharge lamps 2 and 3 as light sources are described, but an LED lighting lamp as a light source may also be provided on the base 1a, instead of the discharge lamps 2 and 3, by disposing an LED element, which is a semiconductor light emitting element not shown. . The power supply device 100 of the present invention is disposed inside the appliance main body 1 . In addition, although not shown, it is of course possible to further provide a reflector, terminals, wiring, and the like.

FIG. 2 shows a schematic configuration of the power supply unit 100 of the present invention incorporated in the fixture main body 1 of the lighting fixture configured as described above.

In FIG. 2( a ), 10 is an AC power supply, and this AC power supply 10 is constituted by a commercial power supply not shown. An input terminal of a full-wave rectification circuit 11 is connected to this AC power supply 10 . The full-wave rectification circuit 11 generates an output of full-wave rectification of the AC power from the AC power supply 10 . A capacitor 12 for smoothing a ripple current is connected between positive and negative output terminals of the full-wave rectifier circuit 11 .

Both ends of the capacitor 12 are connected to a step-up chopper circuit 13 as a power supply mechanism. 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 11, and the field The effect transistor 15 is connected in parallel to an electrolytic capacitor 17 as a smoothing capacitor via a flywheel diode 16 of polarity shown in the figure. In addition, a series circuit of resistors 18 and 19 as voltage detection means is connected to both ends of the electrolytic capacitor 17 . The resistors 18 and 19 generate divided voltages based on the output of the electrolytic capacitor 17 , and output the terminal voltage of the resistor 19 among them to the control unit 20 . The field effect transistor 15 is turned on and off based on the comparison result between the terminal voltage of the resistor 19 in the control unit 20 and a reference voltage prepared in advance. The inductor 14 stores and releases electromagnetic energy accompanying the on/off operation of the field effect transistor 15 , and generates a boosted output from the electrolytic capacitor 17 via the freewheel diode 16 . The control unit 20 will be described later.

The boost chopper circuit 13 is connected to an output generating circuit 21 as an output generating means. In this output generating circuit 21, the electrolytic capacitor 17 is connected in parallel to a series circuit of field effect transistors 221 and 222 as first and second field effect transistors. In addition, the respective gates of the field effect transistors 221 and 222 are connected to the control unit 20 and controlled by the control unit 20 . In this case, the output generating circuit 21 performs two operations according to the instructions from the control unit 20. The first operation is to use the field effect transistors 221 and 222 connected in series to form a so-called half-bridge inverter as an AC output mechanism. A phase circuit, and generates a high-frequency AC output by turning on and off the field effect transistors 221 and 222 alternately. In addition, the second action is to turn off one field effect transistor 222 in the field effect transistors 221 and 222 (in this case, the field effect transistor 222 operates as a freewheeling diode through a body diode), A step-down chopper is constituted by the other field effect transistor 221 , and a chopper output is generated by turning on and off the field effect transistor 221 . In this case, a step-down chopper of a synchronous rectification method that generates a DC output in synchronization by using the field effect transistor 222 may also be configured.

Further, in this output generating circuit 21, a field effect transistor 222 is connected in parallel to a series circuit of an inductor 23 serving as a ballast choke, a capacitor 24, and a capacitor 25 serving as an impedance element for current cutoff. The capacitor 25 is connected in parallel with the switching element 26 . The switching element 26 is turned on and off according to an instruction from the control unit 20 , and opens or short-circuits the capacitor 25 for DC cutoff.

Here, when the output generating circuit 21 operates as a half-bridge type inverter, the inductor 23 and the capacitor 23 have a high-frequency AC output generated by alternately turning on and off the field effect transistors 221 and 222. 24 operates as a resonant circuit. In addition, when the output generating circuit 21 operates as a step-down chopper, a dropped voltage is generated at both ends of the capacitor 24 by storing and releasing electromagnetic energy in the inductor 23 accompanying the on/off of the field effect transistor 221. voltage DC output.

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

The female connector 28 is connected to a male connector 31 of a discharge lamp 30 or a male connector 33 of an LED lighting lamp 32 (see FIG. 2( b )) having an LED element as another connection means. In the illustrated example, a discharge lamp 30 (corresponding to the discharge lamps 2 and 3 shown in FIG. 1 ) is connected. In this case, the discharge lamp 30 has a pair of filaments 301, 302, wherein one filament 301 is connected to the connecting terminals 31a, 31b of the male connector 31 corresponding to the connecting terminals 28a, 28b of the female connector 28, and the other is The filament 302 is connected to the connection terminals 31 c , 31 d of the male connector 31 corresponding to the connection terminals 28 c , 28 d of the female connector 28 . And the discharge lamp 30 connects each connection terminal 31a-31d to the connection terminal 28a-28d of the female connector 28 in the state which connected the male connector 31 to the female connector 28, respectively.

On the other hand, as shown in FIG. 2( b), the LED lighting lamp 32 has connection terminals 33a, 33b of the male connector 33 corresponding to the connection terminals 28a, 28b of the female connector 28, respectively, corresponding to the connection terminals 33a, 33b of the female connector 28. Connection terminals 33c, 33d of the male connector 33 to which the terminals 28c, 28d are connected. A resistor element 34 corresponding to the filament resistance of the discharge lamp 30 is connected between the connection terminals 33a and 33b, and a resistor element 35 corresponding to the filament resistance of the discharge lamp 30 is also connected between the connection terminals 33c and 33d. In addition, an input terminal of a full-wave rectification circuit 36 including a diode bridge is connected between the connection terminals 33b and 33d. Furthermore, one LED element 37 as a semiconductor light emitting element or a plurality of LED elements 37 connected in series are connected between the positive and negative output terminals of the full-wave rectification circuit 36 . Here, the resistance element 34 ( 35 ) is a resistance element corresponding to the resistance value (filament resistance) of the filament 301 ( 302 ) of the discharge lamp 30 , and the resistance value corresponding to the number of LED elements 37 is set. For example, when there is one LED element 37, the resistance value of the resistance element 34 is set to 4.7 kΩ, when there are two LED elements 37, the resistance value of the resistance element 34 is set to 10 kΩ, and when the LED element 37 is When there are three LED elements 37, the resistance value of the resistance element 34 is set to 47 kΩ, and when there are four LED elements 37, the resistance value of the resistance element 34 is set to 100 kΩ.

Moreover, this kind of LED lighting lamp 32 also connects the respective connection terminals 33 a to 33 d to the connection terminals 28 a to 28 d of the female connector 28 in a state where the male connector 33 is connected to the female connector 28 .

In addition, if the connection direction of the male connector 33 connected to the female connector 28 is limited to one direction when the LED lighting lamp 32 is mounted on a lighting fixture, the full-wave rectification circuit 36 can be omitted.

A current detection circuit 38 serving as load current detection means is connected in series between the connection terminal 28d of the female connector 28 and the DC cutoff capacitor 25 . This current detection circuit 38 is composed of a series circuit of a resistance element 381 and a diode 383 of the polarity shown in the figure, and a parallel circuit of a diode 382 of the polarity shown in the figure, which will flow into a discharge lamp 30 (or LED lighting lamp 32). direction of the current as the load current for detection.

The connection terminal 28c of the female connector 28 is connected to the other end of a resistance element 39 to which a reference voltage Vcc (for example, +15V) is applied. At the connection point P between the resistance element 39 and the connection terminal 28c, a resistance element 34 (resistor element 34) and a filament 302 of the discharge lamp 30 for determining whether the light source is the discharge lamp 30 or the LED illumination lamp 32 or the LED illumination lamp 32 are generated. 35) Output voltage VR corresponding to the respective resistance value (filament resistance). This output voltage VR is input to the control unit 20 .

The control unit 20 controls the entire power supply device, and includes a step-up 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 composed of software. Of course, it may 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 according to the comparison result of the reference voltage and the terminal voltage of the resistor 19, and through the associated field effect transistor 15 The storage and release of the electromagnetic energy in the inductor 14 of the on/off action causes the two ends of the electrolytic capacitor 17 to generate a boosted output voltage.

The light source determining unit 202 determines whether the light source is the discharge lamp 30 or the LED lighting 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, when the light source is 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 below 1V. On the other hand, when the light source is an LED lighting lamp 32, for example, when there is one LED element 37 and the resistance value of the resistance element 34 (35) is 4.7 kΩ, the output voltage VR reaches 1.4 V, and when the LED element 37 is When there are two resistor elements 34 (35) with a resistance value of 10kΩ, the output voltage VR reaches 2.6V. When there are three LED elements 37 and the resistance value of the resistor element 34 (35) is 47kΩ, the output voltage VR reaches 2.6V. VR reaches 7.5V, and when there are four LED elements 37 and the resistance value of the resistance element 34 ( 35 ) is 100 kΩ, the output voltage VR reaches 10.2V. Thus, in the light source judging section 202, different critical values V1 and V2 (wherein, V1<V2) are set in advance. If VR V1, it is determined that the light source is the discharge lamp 30, and if V1<VR V2, it is determined that The light source is the LED illuminating lamp 32, and if V2<VR, then it is determined that the light source is not connected to the no-load state.

The output generating circuit control unit 203 first operates the output generating circuit 21 as a half-bridge inverter after turning on the power. In addition, if the light source is determined to be the discharge lamp 30 according to the determination result of the light source determination unit 202, the inverter operation of the output generating circuit 21 is continued; Press the chopper for action. When the output generating circuit control unit 203 makes the output generating circuit 21 perform an inverter operation, the field effect transistors 221 and 222 are configured as a half-bridge inverter circuit, and the field effect transistors 221 and 222 are configured at an operating frequency of tens of kHz to 200 kHz. The effect transistors 221 and 222 are alternately turned on and off to generate a high-frequency AC output. In addition, when the output generation circuit 21 is operated as a step-down chopper, one field effect transistor 222 among the field effect transistors 221 and 222 is turned off, and the other field effect transistor 221 is turned off according to the output from the dimming control unit. The control signal output by 204 is turned on/off to generate the chopper output. In addition, when the light source determination unit 202 determines that the light source is the LED lighting lamp 32 , the output generation circuit control unit 203 turns on the switching element 26 and short-circuits the capacitor 25 for DC cutoff.

As shown in FIG. 3 , the dimming control unit 204 has a reference signal generating unit 2041 and a comparator 2042 . The reference signal generating unit 2041 is connected to the external dimming signal generating unit 40, and uses the dimming signal of the dimming signal generating unit 40 to generate full-light lighting and dimming for the discharge lamp 30 (or LED lighting lamp 32). Reference signal for lighting. One terminal of the comparator 2042 is input with the reference signal generated by the reference signal generation unit 2041, and the other terminal is input with the load current detected by the current detection circuit 38. 203 control signal and output. Accordingly, the current flowing into the discharge lamp 30 (or the LED lighting lamp 32 ) is controlled so as to be close to the reference signal with respect to the reference signal generated by the reference signal generator 2041 , thereby performing constant current control.

Next, an embodiment configured as described above will be described based on the flowchart shown in FIG. 4 .

First, the power is turned on by a power switch not shown in step 401, and the process proceeds to step 402, where the step-up chopper operation by the step-up chopper circuit 13 is performed. In this case, if the AC power of the AC power supply 10 is full-wave rectified in the full-wave rectification circuit 11 and supplied to the boost chopper circuit 13, the boost chopper circuit control section of the control section 20 In 201, the field effect transistor 15 is turned on and off based on the comparison result of the reference voltage prepared in advance and the terminal voltage of the resistor 19 of the voltage detection means. As a result, a boosted output voltage is generated in the electrolytic capacitor 17 via the freewheel diode 16 by storing and releasing the electromagnetic energy of the inductor 14 accompanying the on/off operation of the field effect transistor 15 .

Next, go to step 403, and first execute the inverter action. In this step 403 , the output voltage of the boost chopper circuit 13 is input to the output generation circuit 21 . In the output generation circuit 21, the field effect transistors 221 and 222 are configured as a half-bridge type inverter circuit by the output generation circuit control unit 203 of the control unit 20, and the driving force input from the output generation circuit control unit 203 is utilized. The signal turns the field effect transistors 221 and 222 on and off, thereby generating high-frequency alternating current between the drain and the source of the field effect transistor 222 .

In this state, in step 404, the output voltage VR corresponding to the resistance of the filament is detected in order to determine the light source. Then, enter step 405, and determine whether the light source is the discharge lamp 30 or the LED lighting lamp 32 according to the output voltage VR. In this case, the resistance value of the filament 302 of the discharge lamp 30 or the resistance value (filament resistance) of the resistance element 34 (resistor element 35 ) of the LED lighting lamp 32 is generated at the connection point P between the resistance element 39 and the connection terminal 28c. The corresponding output voltage VR is input to the light source determination unit 202 of the control unit 20 .

In the light source judging unit 202 , it is judged whether the light source is the discharge lamp 30 or the LED lighting lamp 32 using preset threshold values V1 and V2 . Now, if it is assumed that the discharge lamp 30 as the light source is connected, it becomes VR V1 in step 405, thereby determining that the light source is the discharge lamp 30.

In this case, in step 407, the switching element 26 is turned on and the capacitor 25 for DC cutoff is opened. This action is performed when the inverter in step 403 is operating, and in step 407, the same action is repeated.

Next, go to step 408 to continue the inverter operation described in step 403 . In this case, the output generation circuit 21 also maintains a half-bridge inverter circuit composed of field effect transistors 221 and 222 through the output generation circuit control unit 203 of the control unit 20, and utilizes the output generation circuit control unit from the output generation circuit control unit. The drive signal input by 203 turns on and off the field effect transistors 221 and 222 to generate high-frequency AC output.

The high-frequency AC output output from the output generation circuit 21 is supplied to the inductor 23 and the capacitor 24 for resonance, and the inductor 23 and the capacitor 24 are operated as a resonance circuit. In this state, when the preheating current flows from the first auxiliary coil 231 and the second auxiliary coil 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 , so as to light the discharge lamp 30 .

Next, in step 409 , the current flowing into the discharge lamp 30 is detected by the current detection circuit 38 as a load current. Then, if No in step 410 (keep the power on), constant current control is performed in step 411 . In this case, the reference signal generated by the reference signal generation unit 2041 of the dimming control unit 204 based on the dimming signal from the dimming signal generating unit 40 is compared with the lamp current detected by the current detection circuit 26 . The resulting control signal is input to the output generation circuit control unit 203 . Thus, 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 corresponding to the control signal from the dimming control unit 204 to generate high-frequency alternating current, thereby lighting the discharge lamp 30 . In this case, the control signal input from the dimming control unit 204 to the output generating circuit control unit 203 is a control signal corresponding to the comparison result of the reference signal and the lamp current, and since the feedback control is performed, the lamp of the discharge lamp 30 Constant current control is performed in such a way that the current is always close to the reference signal (step 411).

In this state, if the reference signal generated by the reference signal generating unit 2041 is changed by the dimming signal of the dimming signal generating unit 40, the control signal output from the dimming control unit 204 changes, and the discharge lamp 30 It is controlled by lighting in the range of full light to dimming. In this case, the output generation circuit 21 turns on and off the field effect transistors 221 and 222 at an operating frequency of a duty ratio of 50% of the driving signal from the output generation circuit control unit 203. state, the reference signal changes due to the dimming signal of the dimming signal generation part 40, thereby causing the control signal output from the dimming control part 204 to change, then corresponding to the change at this time, the output from the output generation circuit control part The operating frequency of the 50% duty cycle of the driving signal of 203 is changed. Accordingly, the AC output supplied to the discharge lamp 30 is controlled, and the lighting state of the discharge lamp 30 is controlled within a range from full light to dim according to the dimming signal from the dimming signal generator 40 .

Then, in step 410, if it is judged Yes by turning off the power supply, the high-frequency alternating current of the output generating circuit 21 is stopped, and the discharge lamp 30 is turned off.

On the other hand, when the LED lighting 32 as the light source is connected, V1<VR V2 is satisfied in step 405, and it is determined that the light source is the LED lighting 32. Then, in step 413 , the switching element 26 is turned off to short-circuit the capacitor 25 for DC cutoff.

Next, proceed to step 414 and switch to the chopper operation for turning on the LED lighting lamp 32 . In this case, in step 414 , the output voltage of the step-up chopper circuit 13 is input into the output generation circuit 21 . In the output generation circuit 21, the output generation circuit control unit 203 of the control unit 20 turns off one of the field effect transistors 221 and 222, the field effect transistor 222, and makes the other field effect transistor 221 turn off according to the output from the dimming control unit. The control signal output by 204 is turned on and off. Thus, by storing and releasing the electromagnetic energy of the inductor 23 accompanying the on/off operation of the field effect transistor 221, a stepped-down output voltage (DC output) is generated at both ends of the capacitor 24, and lighting is performed using this output voltage. LED lighting 32.

Next, in step 409 , the current flowing into the LED lighting lamp 32 is detected by the current detection circuit 38 as the load current. Then, if No in step 410 (keep the power on), constant current control is performed in step 411 . In this case, the reference signal generated by the reference signal generation unit 2041 of the dimming control unit 204 based on the dimming signal from the dimming signal generating unit 40 is compared with the lamp current detected by the current detection circuit 26 . The resulting control signal is also input to the output generation circuit control unit 203 . Accordingly, the output generation circuit control unit 203 turns on and off the field effect transistors 221 and 222 of the output generation circuit 21 in response to the control signal from the dimming control unit 204, and the switching on and off of the field effect transistor 221 is performed. The storage and release of the electromagnetic energy of the inductor 23 generates a reduced DC output at both ends of the capacitor 24 , thereby lighting the LED lighting lamp 32 .

In this case, the control signal input from the dimming control unit 204 to the output generation circuit control unit 203 is also a control signal corresponding to the comparison result of the reference signal and the lamp current, and since feedback control is performed, the LED lighting lamp 32 Constant current control is performed so that the lamp current is always close to the reference signal (step 411).

In addition, in this state, if the reference signal generated by the reference signal generating unit 2041 is changed by the dimming signal of the dimming signal generating unit 40, the control signal output from the dimming control unit 204 also changes, The LED lighting lamp 32 is turned on and controlled within a range from full light to dimming. In this case, the output generation circuit 21 turns on and off the field effect transistors 221 and 222 at a predetermined duty ratio input from the output generation circuit control unit 203. The dimming signal of the optical signal generation part 40 changes, thereby causing the control signal output from the dimming control part 204 to change, then corresponding to this change, the duty ratio input from the output generation circuit control part 203 changes. . Accordingly, the DC output supplied to the LED lighting lamp 32 is controlled, and the lighting state of the LED lighting lamp 32 is controlled within a range from full lighting to dimming in accordance with the dimming signal from the dimming signal generator 40 .

Then, in step 410, if it is judged Yes by turning off the power, the DC output of the output generating circuit 21 is stopped, and the LED lighting lamp 32 is turned off.

Furthermore, when it is judged in step 405 that V2<VR, it is judged as a no-load state in which no light source is connected, and in step 406, the output of the power supply device is stopped.

Therefore, if this is done, the output voltage VR obtained by the light source determination unit 202 based on the resistance value of the filament 302 of the discharge lamp 30 and the resistance value of the resistance element 34 (35) provided in the LED lighting lamp 32, Determine whether the light source is a discharge lamp 30 or an LED lighting lamp 32. According to the result of the determination, if it is determined that the light source is a discharge lamp 30, then the field effect transistors 221 and 222 of the output generating circuit 21 are configured as a half-bridge inverter circuit, The discharge lamp 30 is lit by the high-frequency AC output generated by the alternate on/off of the field effect transistors 221 and 222. In addition, if it is determined that the light source is the LED lighting lamp 32, the output generating circuit 21 One field effect transistor 222 of the field effect transistors 221 and 222 is turned off, and the other field effect transistor 221 is used to form a step-down chopper, and the DC output generated by turning on and off the field effect transistor 221 is used. The LED lighting lamp 32 is turned on. Thus, an optimal high-frequency AC output can be supplied to the discharge lamp 30, and an optimal and stable DC output can also be supplied to the LED lighting lamp 32. The circuit converts AC power into DC power to light up the LED element, thereby achieving stable lighting operation without flickering in the LED element.

In addition, in the LED lighting lamp 32, only one full-wave rectification circuit 36 including a diode bridge is provided (if this full-wave rectification circuit 36 is installed on the appliance main body 1 of the LED lighting lamp 32, the polarity of the power supply device The direction has been determined in advance, so it can be omitted), compared with the previous LED lighting lamp composed of complex circuits such as multiple diode bridge circuits inside the LED lighting lamp, the price can also be cheaper, and there are many settings. The economy of this kind of LED lighting lamp can also be more favorable.

In addition, in the above, the capacitor 25 for direct current cutoff is connected in series between the capacitor 24 and the field effect transistor 222, but it may be connected in series between the inductor 23 and the field effect transistor 221, and it is also possible to connect They are respectively connected in series between the capacitor 24 and the field effect transistor 222 and between the inductor 23 and the field effect transistor 221 . In this case, the capacitor is connected in parallel to the switching element, and when it is determined that the light source is the LED lighting 32 , the capacitor is also short-circuited by turning on the switching element instructed by the control unit 20 .

In addition, although the example in which the field effect transistors 221 and 222 are used to configure the half-bridge inverter circuit has been described above, other switching elements may be used instead of the field effect transistors 221 and 222 . In this case, it is only necessary to configure one switching element corresponding to the field effect transistor 222 by a switch section in which diodes are connected in parallel, and the same operation as that of the field effect transistor 222 can be obtained.

(Modification)

In the above-mentioned first embodiment, the full-power lighting and dimming lighting of the discharge lamp 30 (or LED lighting lamp 32) are performed based on the reference signal generated by the dimming signal from the external dimming signal generator 40, but when When the light source is the LED lighting lamp 32, if a dimming signal is input for dimming and lighting, the rise of the dimming signal at this time is relatively slow, so the LED element 37 of the LED lighting lamp 32 may be brightly lit only for a moment, and there is a problem. When lighting cannot be started from the desired brightness.

Therefore, in this modified example, even when the light source is the LED lighting lamp 32, stable dimming and lighting can be obtained. In this case, as shown in FIG. 2 , a delay control unit 205 is further provided in the control unit 20 . When the control signal is output from the dimming control unit 204, the delay control unit 205 causes the output generation circuit control unit 203 to operate after a delay of a predetermined time, for example, 0.5 sec.

Others are the same as in Figure 2.

In this way, when it is determined that the light source is the LED lighting lamp 32, after a certain period of time has elapsed since the output of the control signal, the dimming control based on the control signal becomes effective, and the dimming of the LED lighting lamp 32 is performed, so the LED lighting The unpleasant brightness (brightly lit only for a moment) at the start of the lamp 32 disappears, and dimming and lighting can be performed from a desired brightness.

However, if the control signal is output from the dimming control unit 204 and the light source determination unit 202 determines that the light source is the LED lighting lamp 32, the delay control unit 205 of this modified example delays for a predetermined time and then causes the output generation circuit control unit 203 to operate. , but if, for example, an integrating circuit is provided for the control signal output from the dimming control unit 204, and the control signal is gradually increased, then the brightness of the LED lighting lamp 32 can also be gradually increased to a desired brightness. The so-called fade in (fade in).

(Second Embodiment)

In the first embodiment, when determining whether the light source is the discharge lamp 30 or the LED lighting lamp 32, the resistance value of the filament 302 of the discharge lamp 30 and the resistance value of the resistance element 34 (35) provided in the LED lighting lamp 32 are detected. Corresponding output voltage VR, however, in the second embodiment, the light source is determined by focusing on the fact that the discharge lamp 30 and the LED lighting lamp 32 have different voltage or current rise states at the time of startup.

Fig. 5 (a) (b) shows a schematic configuration of a second embodiment of the present invention, and the same parts as in Fig. 2 are denoted by the same reference numerals. In this case, in the LED illuminating lamp 32 shown in FIG.5(b), between the connection terminals 33a and 33b of the female connector 33, and between the connection terminals 33c and 33d are respectively short-circuited. In addition, in FIG. 5( a ), the field effect transistors 221 and 222 of the output generation circuit 21 are connected in series to the power detection circuit 41 . This power detection circuit 41 has a resistance element 411 connected in series with the field effect transistors 221 and 222, and detects the voltage generated in the resistance element 411 as the load power of the discharge lamp 30 (or LED lighting lamp 32). In addition, the light source determination unit 202 of the control unit 20 determines whether the light source is the discharge lamp 30 or the LED lighting lamp 32 based on the state of voltage and current detected by the power detection circuit 41 when the discharge lamp 30 and the LED lighting lamp 32 are activated. In this case, the lamp voltage VL at the time of start-up of the discharge lamp 30 is operated by the inverters of the field effect transistors 221 and 222, and as shown in FIG. After further increasing before the start, it is maintained at a constant voltage as the discharge starts. In addition, as shown in FIG. 6( b ), the lamp current IL does not flow during the warm-up start period, but starts to flow as the discharge of the discharge lamp 30 starts. On the other hand, the lamp voltage at the start of the LED lighting lamp 32 is clamped by the forward voltage Vf of the LED element 37 after the inverter operation of the field effect transistors 221 and 222 as shown in FIG. 6( c ). , At the same time, as shown in Figure 6(d), the current If in one direction starts to flow. Thus, in the light source judging section 202, if the lamp voltage clamped by the forward voltage Vf as shown in FIG. The lamp voltage VL at the start of the discharge lamp 30 shown is small), then it is determined that the light source is the LED lighting lamp 32. In addition, if the output voltage of the power detection circuit 41 is detected to be much larger than the forward voltage Vf in FIG. 6 (a ) shows the lamp voltage VL of the discharge lamp 30 at the time of start-up, it is determined that the light source is the discharge lamp 30 .

If it is judged that the light source is the discharge lamp 30 according to the judgment result of the light source judging part 202, the output generation circuit control part 203 makes the field effect transistors 221, 222 constitute a half-bridge inverter circuit, and makes the field effect transistors 221, 222 Alternately turn on and off to generate a high-frequency AC output. In addition, if the light source judging unit 202 judges that the light source is the LED lighting lamp 32, the output generating circuit control unit 203 makes one of the field effect transistors 221, 222 field effect The transistor 222 is turned off, and a DC output is generated by a chopper operation that turns on and off the other field effect transistor 221 .

Accordingly, the same operation as that of the above-mentioned first embodiment can be obtained below, and the same effect can be obtained. In addition, according to the second embodiment, the current detection circuit 38 is provided together with the electric power detection circuit 41. Therefore, for example, when the light source is the LED lighting lamp 32, the load current detected by the current detection circuit 38 and the reference signal can be generated. The comparison result of the reference signal generated by the unit 2041 is used to control the constant current of the LED lighting lamp 32. In addition, when the light source is the discharge lamp 30, it can also be based on the load power detected by the power detection circuit 41 and the reference signal generation unit. The constant electric power control of the discharge lamp 30 is performed based on the comparison result of the generated reference signal in step 2041 .

In addition, in the above-mentioned embodiment, the determination of the light source in the light source determination unit 202 is performed based on the state of the output voltage of the power detection circuit 41 after startup. The flow of current If in one direction after start-up as shown in 6(d) determines that the light source is the LED lighting lamp 32, and in other cases, it is determined that the light source is the discharge lamp 30.

(Modification)

In the above-mentioned second embodiment, the case where the discharge lamp 30 and the LED lighting lamp 32 are each one was described, but there are cases where a plurality of discharge lamps or LED lighting lamps are used as light sources. In this case, there is no problem as long as the plurality of light sources are only discharge lamps or only LED lighting lamps. A mixed load in which a so-called light source such as a discharge lamp is connected to a lamp. In this modified example, the mixed loading of such light sources is determined and the output of the power supply device is forcibly stopped.

In this case, in the light source determination unit 202 of the control unit 20, the peak value of the output voltage (load power) at the time of lighting corresponding to the number of series-connected discharge lamps 30 is set as the first reference value. The output voltage (DC voltage) at the time of lighting corresponding to the serial number of the LED lighting lamp 32 connected in series is set as a 2nd reference value. Here, the output voltage (DC voltage) during lighting of the LED lighting lamp 32 as the second reference value is equal to or less than the peak value of the output voltage (load power) during lighting of the discharge lamp 30 as the first reference value.

With this setting, the light source determination unit 202 determines that a plurality of discharge lamps 30 are connected when the output voltage generated in the resistance element 411 of the power detection circuit 41 is equal to or greater than the first reference value. In addition, when the output voltage generated in the resistance element 411 of the power detection circuit 41 is equal to or less than the first reference value, it is determined that the LED lighting 32 is connected, and further, the possibility of mixed loading is determined using the second reference value. In this case, if the output voltage generated in the resistance element 411 exceeds the second reference value, it is determined that there is a mixed load. Of course, if the output voltage generated in the resistance element 411 is the second reference value, it is determined that a plurality of LED lighting lamps 32 are connected. And, if it is judged by the light source judging unit 202 that there is mixed loading, the output of the power supply device is immediately stopped. Thus, even if an LED lighting lamp is wrongly mounted on a plurality of discharge lamps, or a discharge lamp is wrongly mounted on a plurality of LED lighting lamps, it is possible to accurately determine the mixed loading of the light sources, and to appropriately Stop the output of the power supply unit.

In the above, the case of a plurality of discharge lamps 30 and LED lighting lamps 32 connected in series was described, but the case of a plurality of discharge lamps 30 and LED lighting lamps 32 connected in parallel is the same as above, and the light source can be accurately determined. of mixed loading.

In addition, in the light source determination unit 202, the possibility of mixed loading may be determined by detecting the DC voltage component of the output voltage generated in the resistance element 411 of the electric power detection circuit 41 based on the state that the light source is determined to be the discharge lamp 30. . In this case, the light source judging unit 202 is provided with a DC voltage component detection function of the output voltage, and if the DC voltage component of the output voltage generated in the resistive element 411 is equal to or greater than a predetermined amount, it is determined that the discharge lamp and the LED are mixed. lights and stop the output. In this case, when the output voltage generated in the resistance element 411 is only a DC voltage component, it is determined that a plurality of LED lighting lamps are connected.

(third embodiment)

In the first and second embodiments, an example using a half-bridge inverter circuit was described, but in this third embodiment, a full-bridge inverter circuit is used.

Fig. 7 shows a schematic configuration of the third embodiment, and the same parts as those in Fig. 2 are given the same reference numerals.

In this case, the LED lighting lamp 32 shown in FIG. 7(b) is configured exactly the same as that in FIG. 2(b). In addition, in the output generating circuit 21 shown in FIG. A series circuit of field effect transistors 223 and 224 of transistors is connected in parallel. In addition, the respective gates of the field effect transistors 221 to 224 are connected to the control unit 20 and controlled by the control unit 20 .

In addition, the output generation circuit 21 performs two operations according to instructions from the control unit 20. The first operation is to use the field effect transistors 221 to 224 to form a so-called full-bridge inverter circuit as an AC output mechanism, and to use The non-adjacent field effect transistors formed by the full bridge are grouped. Here, the field effect transistors 221 and 224 are grouped, and the field effect transistors 222 and 223 are grouped, and the groups are turned on and off alternately. , resulting in a high-frequency AC output. In addition, the second action is to group the adjacent field effect transistors formed by the full bridge. Here, the field effect transistors 221 and 222 are grouped, the field effect transistors 223 and 224 are grouped, and the field effect transistors in one group are turned off. The effect transistor 223 turns on the field effect transistor 224, and closes the field effect transistor 222 of one side in the field effect transistor 221 and 222 of another group (in this case, the field effect transistor 222 is used as a freewheeling diode through the body diode to carry out operation), and the other field effect transistor element 221 is used to form a step-down chopper, and the output of the chopper is generated by turning on and off the field effect transistor 221 . In this case, a step-down chopper of a synchronous rectification method that generates a DC output in synchronization by using the field effect transistor 222 may also be configured.

In this output generating circuit 21, an inductor 23 serving as a ballast choke coil, a capacitor 24, and a capacitor 25 for DC cutoff are connected between the connection point of field effect transistors 221 and 222 and the connection point of field effect transistors 223 and 224. series circuit. The capacitor 25 is connected in parallel with the switching element 26 . The switching element 26 is turned on and off according to an instruction from the control unit 20 , and opens and short-circuits the capacitor 25 .

In this case, when the output generating circuit 21 operates as an inverter configured with a full bridge, it is not possible to achieve the result of alternating on and off of the set of field effect transistors 221 and 224 and the set of field effect transistors 222 and 223 . The generated high-frequency AC output also operates as a resonant circuit with the inductor 23 and the capacitor 24 . In addition, when the output generating circuit 21 operates as a step-down chopper, a stepped-down voltage is generated at both ends of the capacitor 24 by storing and releasing electromagnetic energy in the inductor 23 accompanying the on and off of the field effect transistor 221. the DC output.

Other configurations are the same as those in Fig. 2(b).

After the output generating circuit control unit 203 is powered on, firstly, the output generating circuit 21 is operated as an inverter, and if the light source is determined to be the discharge lamp 30 according to the determination result of the light source determining unit 202, the output generating circuit 21 is reversed. The phaser action continues. In addition, when it is determined that the light source is the LED lighting lamp 32, the output generation circuit control unit 203 operates the output generation circuit 21 as a step-down chopper.

In this case, when the output generating circuit 21 is operated as an inverter by the output generating circuit control unit 203, non-adjacent switching elements constituted by a full bridge are formed into a group. Here, the field effect transistors 221 and 224 are formed into a group. The field effect transistors 222 and 223 are grouped into groups, and the groups are turned on and off alternately to generate a high-frequency AC output. In addition, when the output generating circuit control unit 203 operates the output generating circuit 21 as a step-down chopper, adjacent field effect transistors constituted by a full bridge are formed into a group. Here, the field effect transistor 221 and the 222 is grouped, so that the field effect transistors 223 and 224 are grouped, the field effect transistor 223 in one group is turned off and the field effect transistor 224 is turned on, and the field effect transistor 222 of one side in the other group of field effect transistors 221 and 222 is turned off, And the chopper output is generated by turning on and off the other field effect transistor element 221 .

Other actions are the same as in Fig. 2 .

Therefore, even if it is set in this way, the same effect as that of the first embodiment can be obtained.

In addition, according to the third embodiment, the power detection circuit 41 is provided together with the current detection circuit 38. Therefore, for example, when the light source is the LED lighting lamp 32, the load current detected by the current detection circuit 38 and the reference signal can be generated. The comparison result of the reference signal generated by the unit 2041 is used to control the constant current of the LED lighting lamp 32. In addition, when the light source is the discharge lamp 30, it can also be based on the load power detected by the power detection circuit 41 and the reference signal generation unit. The constant electric power control of the discharge lamp 30 is performed based on the comparison result of the generated reference signal in step 2041 .

In addition, although the example in which the field effect transistors 221 to 224 are used to configure the full bridge inverter circuit has been described above, other switching elements may be used instead of the field effect transistors 221 to 224. In this case, the switching element corresponding to the field effect transistor 222 may be constituted by a switch section in which diodes are connected in parallel, and the same operation as that of the field effect transistor 222 can be obtained.

(Modification)

In the third embodiment, a general discharge lamp 30 was described, but it can also be applied to a high-pressure discharge lamp (HID lamp) by combining an igniter or the like. 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 lighting lamp based on the state of the current detected by the current detection circuit 38 when the HID lamp and the LED lighting lamp are activated. That is, the lamp voltage VL1 at the time of starting the HID lamp becomes constant as shown in FIG. The generated high-voltage pulse voltage Vp starts to discharge the HID lamp by application of the high-voltage pulse voltage Vp, and the lamp current IL1 shown in FIG. 8( b ) starts to flow. On the other hand, as shown in FIG. 8( c ), the current If starts to flow as the LED lighting is turned on. Thus, in the light source determination unit 202, the current If that starts to flow after startup is detected based on the output of the current detection circuit 38, thereby determining that the light source is an LED lighting lamp, and the delay after startup is detected based on the output of the current detection circuit 38. When the lamp current IL1 shown in FIG. 8( b ) starts to flow for a predetermined time (after the HID lamp starts discharging), it is determined that the light source is the HID lamp.

Even in this way, the same effect as that of the third embodiment can be obtained.

(fourth embodiment)

In addition, in the conventional power supply device dedicated to the discharge lamp, there is a power supply device with the function of correcting the initial illuminance, that is, the luminance decreases due to the passage of the energization time of the discharge lamp and the deterioration of the lamp, so it is corrected by any method. The energization time of the discharge lamp is counted, and the power supply to the discharge lamp is varied so as to compensate for the decrease in the brightness of the lamp based on the count result, thereby maintaining the brightness of the lamp from the beginning of use to the end of the life of the discharge lamp. must. Such an initial illuminance correction function is effective in cutting off excess power supply at the start of use of the discharge lamp and suppressing energy consumption until the end of the life of the lamp.

This fourth embodiment is an embodiment in which such an initial illuminance correction function is added, and an energization time counter 206 is further provided in the control unit 20 shown in FIG. 2 . The energization time counter 206 counts the energization time of the discharge lamp 30 when the light source determination unit 202 determines that the light source is the discharge lamp 30 . Also, if the discharge lamp 30 is removed from the appliance, the energization time counter 206 is reset, and also, if the discharge lamp 30 is reinstalled, counting is started from the beginning.

Then, the AC output to the discharge lamp 30 supplied by the inverter operation of the output generation circuit 21 is adjusted in accordance with the count value of the energization time counter 206 . In this case, the life of the discharge lamp 30 is about 12,000 hours, and the light beam of the lamp gradually decreases as time passes. However, using a power curve representing the change of the light beam at this time, according to this power curve, the brightness of the discharge lamp 30 is sufficient. During the starting period of use, the AC output supplied from the output generating circuit 21 to the discharge lamp 30 is reduced, and during the end of life period when the brightness of the discharge lamp 30 decreases with time, the AC output supplied from the output generating circuit 21 to the discharge lamp 30 is increased. AC output.

In this way, when it is determined that the light source is the discharge lamp 30, the energization time of the discharge lamp 30 is counted by the energization time counter 206, and the alternating current supplied from the output generating circuit 21 to the discharge lamp 30 is supplied to the discharge lamp 30 corresponding to the count value. Since the output is adjusted optimally, the brightness of the discharge lamp 30 can be kept constant from the start of use to the end of its life.

In addition, in the above, the case where the initial illuminance correction was performed only for the discharge lamp 30 was described, but the initial illuminance correction may be performed for the LED lighting lamp 32 similarly. In this case, an energization time counter that counts the energization time of the LED lighting lamp 32 is provided separately from the energization time counter 206 described above. In addition, the life of the LED element 37 of the LED lighting lamp 32 is about 40,000 hours. As long as the power curve representing the change of the light beam that decreases with the passage of time is used, the output from the output generating circuit 21 to the LED lighting lamp 32 is adjusted according to the power curve. The supplied DC output is sufficient.

In addition, this invention is not limited to the said embodiment, In the implementation stage, various deformation|transformation is possible within the range which does not change the gist. For example, in the above-described embodiment, the determination of whether the light source is a discharge lamp or an LED lighting lamp is automatically performed, but a manually operated selector switch may also be used. In this case, the switch is provided on the appliance main body 1 described in FIG. 1 , and is manually switched to a corresponding position according to the discharge lamp or the LED lighting lamp installed in the appliance main body 1 . In addition, in the above-mentioned embodiments, an example of a power supply unit for normal lighting that can light a discharge lamp or an LED lighting lamp as a light source was described, but it can also be used as a power supply unit for non-commercial lighting, for example. In this case, the storage battery is first built into the power supply unit. 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, and the battery is used as the power supply to drive the power supply unit, thereby lighting and discharging. lamp or LED lighting.

Furthermore, the above-described 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 components are removed from all the components shown in the embodiments, the problems described in the column of problems to be solved by the invention can be solved, and the problems described in the column of effects of the invention can be obtained. In the case of an effect, the configuration without this constituent element can be extracted as an invention.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solution of the present invention.

Claims (7)

1. A power supply device, characterized in that it comprises: The output generating mechanism generates AC output and DC output; a light source illuminated by the output generated by the output generating mechanism; a light source judging mechanism for judging whether the light source is a discharge lamp or a semiconductor light emitting element; and The control means performs control to generate an AC output or a DC output from the output generation means based on the determination result of the light source determination means. 2. The power supply device according to claim 1, characterized in that: The output generating means has an inverter circuit, and the inverter circuit comprises the first and second switching means including field effect transistors or switching elements in which diodes are connected in parallel to form a half bridge, and the control means uses The switching elements of the first and second switching mechanisms of the output generating mechanism are alternately turned on and off to generate an AC output, the switching elements of the first switching mechanism are turned on and off, and the switches of the second switching mechanism are turned on and off. The elements are closed or synchronized using the 2nd switching mechanism, thereby generating a DC output. 3. The power supply device according to claim 1, characterized in that: The output generating means has an inverter circuit, and the inverter circuit constitutes a full bridge from the first to fourth switching means including field effect transistors or switching elements in which diodes are connected in parallel. The switching elements of the non-adjacent groups of the first and fourth switching mechanisms constituted by the full bridge and the switching elements of the group of the second and third switching mechanisms are alternately turned on and off to generate an AC output, so that the full bridge Among the adjacent third and fourth switch mechanisms constituted by bridges, the switch elements of the third switch mechanism are closed, and the switch elements of the fourth switch mechanism are turned on, and the switch elements of the first switch mechanism are turned on and off, and all the switch elements are turned on and off. The switching elements of the second switching mechanism are closed or synchronized using the second switching mechanism, thereby generating a DC output. 4. The power supply device according to any one of claims 1 to 3, characterized in that: The light source determining means determines a light source based on a filament resistance of the discharge lamp and a resistance value of a resistance element connected to the semiconductor light emitting element corresponding to the filament resistance. 5. The power supply device according to any one of claims 1 to 3, characterized in that: The light source judging means judges a light source based on a rising state of voltage or current when the discharge lamp and the semiconductor light-emitting element are activated. 6. The power supply device according to claim 2 or 3, characterized in that: The output generation means includes: an impedance element for direct current cutoff connected to an output side of the inverter circuit; and a switching element short-circuiting the impedance element by generation of a direct current output by the output generation means. 7. A lighting fixture, characterized by comprising: the power supply device according to claim 1 or 3, and a fixture main body having the power supply device.

Images