WO2009119619A1 - 電源装置及びこの電源装置を備える照明器具 - Google Patents
電源装置及びこの電源装置を備える照明器具 Download PDFInfo
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- WO2009119619A1 WO2009119619A1 PCT/JP2009/055873 JP2009055873W WO2009119619A1 WO 2009119619 A1 WO2009119619 A1 WO 2009119619A1 JP 2009055873 W JP2009055873 W JP 2009055873W WO 2009119619 A1 WO2009119619 A1 WO 2009119619A1
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- power
- power supply
- output
- light emitting
- dimming
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
Definitions
- the present invention relates to a power supply device that is optimal for driving a semiconductor light emitting element such as a light emitting diode, and a lighting fixture including the power supply device.
- a power supply device that switches DC power by a switching element is often used.
- this type of power supply device may be used for lighting fixtures having a dimming function capable of arbitrarily adjusting the light amount of a light source for lighting in a store or the like.
- a lighting fixture generally uses a four-wire light control method as a light control method. This is because there are many lighting fixtures used in stores, etc., and there is no problem that harmonics are generated in the input current as in the dimming method based on phase control, and there is no problem with the 4-wire type adjustment for operating many fixtures at the same time. This is because the optical system is suitable.
- a dimming operation unit is integrally provided in a so-called wall switch that is generally disposed on a wall surface.
- a dimming signal generation unit that supplies a dimming signal to the load via the feed terminal is connected to the mechanical switch of the dimming operation unit, and a dimming signal is output from the dimming signal generation unit. It is sent to lighting equipment.
- the mechanical switch of the dimming operation unit is turned on by the user, the lighting fixture is turned on, and at the same time, the dimming signal generation unit is also turned on.
- the lighting switch is turned on (powered on) by turning on the mechanical switch and the dimming signal generator is turned on (powered on) and the dimming signal is output immediately, there is no problem. Lighting and dimming of the lighting fixture can be realized simultaneously. However, if the luminaire is turned on before the dimming signal is output, there is a period during which the luminaire is lit in a state where the dimming signal is not input before the dimming signal is controlled to the desired light amount. Arise. In general, when a dimming signal is not input, the luminaire is set to be lit in an all-light state, and therefore illuminates in an all-light state for a moment and then shifts to a dimming state.
- An object of the present invention is to provide a power supply device and a lighting fixture capable of obtaining a stable lighting state in a semiconductor light emitting element.
- DC output generation means for supplying AC power, converting the AC power into DC power and outputting the DC power;
- a semiconductor light emitting element that emits light by being supplied with the DC power output from the DC output generating means;
- a control means for controlling a DC power output from the DC output generating means in response to the dimming signal, wherein the dimming signal is supplied for a predetermined time period immediately after the supply of the AC power.
- Control means for controlling the DC output generation means so as to cancel the control of the DC power based on the signal and dimming the semiconductor light emitting element to turn it on or off; Is provided.
- DC power generation means for supplying AC power, converting the AC power into DC power according to the dimming signal, and outputting the DC power;
- a semiconductor light emitting element that emits light by being supplied with the DC power output from the DC output generating means;
- the direct-current output generation means is controlled so that the semiconductor light emitting element is dimmed by a predetermined dimming to be turned on or off for a predetermined time period immediately after the supply of the AC power, and after the predetermined time period has elapsed.
- Control means for controlling the direct current power output from the direct current output generation means according to the dimming signal and lighting the semiconductor light emitting element according to the dimming signal; Is provided.
- a lighting fixture including a fixture body having the power supply device described above.
- FIG. 1 is a perspective view schematically showing a lighting fixture having a power supply device according to a first embodiment of the present invention.
- 2 is a cross-sectional view schematically showing the internal structure of the lighting apparatus shown in FIG.
- FIG. 3 is a circuit diagram schematically showing a power supply circuit of the power supply device shown in FIG.
- FIG. 4A is a timing chart for explaining the operation of the power supply circuit shown in FIG.
- FIG. 4B is a timing chart for explaining the operation of the power supply circuit shown in FIG.
- FIG. 4C is a timing chart for explaining the operation of the power supply circuit shown in FIG.
- FIG. 4D is a timing chart for explaining the operation of the power supply circuit shown in FIG.
- FIG. 4E is a timing chart for explaining the operation of the power supply circuit shown in FIG.
- FIG. 5 is a circuit diagram showing a circuit of a power supply device according to the second embodiment of the present invention.
- FIG.1 and FIG.2 has shown the lighting fixture with which the power supply device which concerns on embodiment of this invention is integrated.
- reference numeral 1 denotes an instrument body.
- the instrument body 1 is made by die-casting aluminum and is formed in a substantially cylindrical shape having both ends opened.
- the inside is divided into three space parts by the partition members 1a and 1b up and down, and the light source part 2 is provided in the lower space between the downward opening and the partition member 1a.
- the light source unit 2 is provided with a plurality of LEDs 2a as semiconductor light emitting elements and a reflector 2b that reflects light rays from the LEDs 2a.
- Several LED2a is mounted in lower space, and is arrange
- the hollow space between the partition member 1 a and the partition member 1 b of the appliance body 1 is assigned to the power supply chamber 3.
- a wiring board 3a is disposed on the partition member 1a.
- the wiring board 3a is provided with each electronic component constituting a power supply device for driving the plurality of LEDs 2a.
- the DC power supply device and the plurality of LEDs 2 a are connected by lead wires 4.
- the space between the partition plate 1 b of the appliance body 1 and the upper opening is defined in the power terminal room 5.
- a power terminal block 6 is provided on the partition plate 1b.
- the power supply terminal block 6 is a terminal block for supplying AC power from a commercial power source to the power supply device in the power supply chamber 3, and serves as power supply terminals for power cables on both sides of the box 6a made of electrically insulating synthetic resin. It has an insertion port 6b, an insertion port 6c serving as a feed cable terminal, a power line, a release button 6d for cutting off the feed line, and the like.
- FIG. 3 shows a circuit diagram of the power supply device according to the embodiment of the present invention incorporated in the power supply chamber 3 of the lighting fixture configured as described above.
- symbol 11 has shown the alternating current power supply as a commercial power supply outside a lighting fixture.
- This AC power supply 11 is connected to a power supply terminal 6b of the luminaire shown in FIG. 2 via a lighting switch (not shown) outside the luminaire, and this power supply terminal 6b has a noise comprising a capacitor 12 and an inductor 13.
- a filter circuit 14 is connected.
- a capacitor 12 is connected in parallel between power supply terminals, and a full-wave rectifier circuit 15 is connected via an inductor 13.
- the full-wave rectifier circuit 15 outputs a rectified voltage VDC obtained by full-wave rectifying the AC power from the AC power supply 11 as shown in FIG. 4A.
- a smoothing capacitor 16 that smoothes the ripple current is connected in parallel between the output terminals of the full-wave rectifier circuit 15.
- the noise filter circuit 14, the full-wave rectifier circuit 15 and the capacitor 16 constitute a DC power supply circuit, and this DC power supply circuit is connected to the primary winding 17a of the switching transformer 17 which is a flyback transformer.
- a field effect transistor (FET) 18 as a switching element is connected in series to a primary winding 17a of a switching transformer 17 which is a flyback transformer.
- a series circuit of the primary winding 17 a of the switching transformer 17 and the field effect transistor 18 is connected to both ends of the smoothing capacitor 16.
- the switching transformer 17 has a secondary winding 17b and a tertiary winding 17c that are magnetically coupled to the primary winding 17a.
- a snubber circuit 22 is connected to both ends of the primary winding 17a of the switching transformer 17.
- the snubber circuit 22 includes a capacitor 19, a resistor 20, and a backflow prevention diode 21.
- the capacitor 19 and the resistor 20 are connected in parallel.
- the parallel circuit of the capacitor 19 and the resistor 20 is connected to the switching transformer via the diode 21.
- 17 is connected to a connection point between the primary winding 17 a and the field effect transistor 18.
- the flyback voltage generated in the primary winding 17a of the switching transformer 17 is absorbed, and the ringing voltage generated by the leakage inductance is absorbed and flows into the primary winding 17a when the field transistor 18 is turned off. Current is regenerated.
- the flyback voltage charges the capacitor 19, and when the flyback voltage disappears, the capacitor 19 discharges the charge voltage through the resistor 20. Absorbed by the circuit 22.
- the ringing voltage is used for charging the capacitor 19 and absorbed by the capacitor 19.
- a rectifying / smoothing circuit 25 for rectifying and smoothing the voltage generated in the secondary winding 17b is connected to the secondary winding 17b of the switching transformer 17.
- the rectifying and smoothing circuit 25 includes a diode 23 connected in series to the secondary winding 17b and a smoothing capacitor 24 connected in parallel to the secondary winding 17b.
- the rectifying / smoothing circuit 25, together with the snubber circuit 22, the field effect transistor 18, and the switching transformer 17, constitutes a DC lighting circuit that generates a DC output for lighting the light emitting diode.
- the light emitting diodes 26 to 29 connected in series are supplied with a direct current according to a certain direct current voltage output from the rectifying / smoothing circuit 25 and are dimmed.
- a rectifying / smoothing circuit including a diode 30 and a capacitor 31 is connected to the tertiary winding 17c of the switching transformer 17.
- the diode 30 is connected in series to the terminal of the tertiary winding 17c and rectifies the AC output generated in the tertiary winding 17c
- the capacitor 31 is connected in parallel to the tertiary winding 17c via the diode 30.
- the rectified output from is smoothed and output as a DC voltage.
- the rectifying / smoothing circuit connected to the tertiary winding 17c functions as a circuit for detecting voltage application to the light emitting diodes 26 to 29, and outputs a voltage from the rectifying / smoothing circuit 25 connected to the secondary winding 17b. Synchronous voltage is output synchronously.
- a series circuit of a resistor 32 and a phototransistor 332 of a photocoupler 33 is connected to the capacitor 31 in parallel.
- the photocoupler 33 is configured by accommodating a light emitting diode 331 and a phototransistor 332 that are electrically isolated from each other and optically coupled in the same package.
- the phototransistor 332 receives light generated from the light emitting diode 331.
- the phototransistor 332 is turned on.
- the light-emitting diode 331 of the photocoupler 33 is connected to a rectifier circuit 35, and this rectifier circuit 35 is connected to an input terminal 6c (corresponding to an insertion port 6c serving as a feed cable terminal portion).
- the input terminal 6c is connected to a dimming operation unit 34 provided on a wall surface or the like outside the lighting fixture.
- the dimming operation unit 34 includes a PMW generation unit (not shown) that generates a PMW dimming signal for setting the dimming depth, and when the lighting switch is turned on, the PMW dimming signal is input to the rectifying circuit 35 via the input terminal 6c. Supply. Therefore, during the on-duty period of the PMW dimming signal, the light emitting diode 331 operates to emit light, and the phototransistor 332 is turned on during that period.
- the PMW dimming signal can change the duty ratio of the pulse signal in accordance with a user operation in the dimming operation unit 34, and the dimming depth according to this duty ratio is set.
- the capacitor 31 has a series circuit of a capacitor 36 and a resistor 37 connected in parallel.
- the series circuit of the capacitor 36 and the resistor 37 constitutes a differentiating circuit, and a differential output is generated at the connection point of the capacitor 36 and the resistor 37 for a predetermined time period T by the voltage output from the capacitor 31.
- the predetermined time period T is set longer than the maximum delay time TD.
- the maximum delay time TD is defined as a period from the time when the lighting switch is turned on to the time when the dimming control is started after the electric power is supplied from the power supply 11 until the dimming signal is output.
- a diode 38 is connected to the resistor 37 in parallel with the polarity shown. The diode 38 is provided to discharge the electric charge charged in the capacitor 36 of the differentiation circuit.
- the base of the transistor 39 is connected to the connection point of the capacitor 36 and the resistor 37 as a switching element.
- This transistor 39 has its emitter grounded, has its collector connected to the positive input terminal of the operational amplifier 40, and is turned on for a predetermined time period T by the differential output generated at the connection point of the capacitor 36 and resistor 37.
- a series circuit of the resistor 41 and the capacitor 42 is connected between the connection point A of the resistor 32 and the phototransistor 332 and the ground.
- the connection point B of the resistor 41 and the capacitor 42 is connected to the collector of the transistor 39 and to the positive input terminal of the operational amplifier 40.
- VDIM dimming signal
- the operational amplifier 40 has a negative input terminal connected to the output terminal, and this output terminal is connected to the control circuit 44 via a diode 43 of the illustrated polarity. Further, a reference voltage source Vref is connected to the control circuit 44 via a diode 45 having the illustrated polarity.
- the diodes 43 and 45 constitute an OR circuit, and at the connection point C, the larger one of the operational amplifier 40 and the reference signal Vref is output to the control circuit 44 as the control signal Vcont as shown in FIG. 4E. .
- the control circuit 44 controls the output supplied to the light emitting diodes 26 to 29 by switching on and off the field effect transistor 18 by the operation according to the control signal Vcont to switch the switching transformer 17.
- the control circuit 44 is configured by a switching pulse generation circuit in which the on-duty ratio is determined according to the level of the control signal Vcont.
- the control circuit 44 includes a memory referred to by the control signal Vcont, an arithmetic circuit that generates a pulse signal at an on-duty ratio stored in the memory, and an amplifier that amplifies a pulse output from the arithmetic circuit. Is done.
- the dimming operation unit 34 is set in a state in which a dimming signal having a certain dimming depth can be output from the dimming signal generation unit 34 in advance by the user. It is assumed that .about.29 are set to light up. Further, it is assumed that the reference signal Vref is set to a level necessary for lighting the light emitting diodes 26 to 29 at a fixed level, for example, the minimum light amount as shown in FIG. 4D.
- the lighting switch provided in the dimming operation unit 34 is operated at the time t0 when the illumination light is dimmable, and the lighting fixture is turned on (powered on).
- the generator 34 is also turned on.
- the AC power of the AC power supply 11 is supplied to the full-wave rectifier circuit 15 by turning on the lighting device, and the DC voltage shown in FIG. 4A is applied to the ripple current smoothing capacitor 16 from the full-wave rectifier circuit 15. Is output. This voltage output is applied to the primary side of the switching transformer 17 and the series circuit of the field effect transistor 18 in the off state.
- the field effect transistor 18 is in an off state because it is not turned on, and no DC voltage is applied to the primary side of the switching transformer 17, and a certain delay time TD elapses as will be described later. After that, the field effect transistor 18 is turned on and off, and a DC voltage is applied to the primary side of the switching transformer 17.
- the reference signal Vref shown in FIG. 4D is input to the control circuit 44 through the diode 45 as the control signal Vcont shown in FIG. 4E. Accordingly, the control circuit 44 starts driving the field effect transistor 18 in response to the control signal Vcont having the level of the reference signal Vref. That is, the control circuit 44 refers to the level of the reference signal Vref, generates a pulse signal having an on-duty ratio determined by the level of the reference signal Vref, and applies it to the gate of the field effect transistor 18.
- the control circuit 44 starts outputting the pulse signal from time t0.
- the field effect transistor 18 is turned on during the on period determined by the on-duty ratio, and is turned off during the off period determined by the on-duty ratio.
- the field effect transistor 18 is turned on / off by a pulse signal, the DC voltage output from the rectifying and smoothing circuit is switched and converted into a rectangular wave, and this rectangular wave is applied to the switching transformer 17. Accordingly, the switching transformer 17 is driven to be switched. More specifically, when the field effect transistor 18 is turned on, current is passed through the primary winding 17a of the switching transformer 17, and energy is stored. When the field effect transistor 18 is turned off, energy stored in the primary winding 17a is secondary. Released through the winding 17b.
- an AC output voltage is supplied from the secondary winding 17b of the switching transformer 17 to the rectifying / smoothing circuit 25, converted into a DC voltage output by the rectifying / smoothing circuit 25, and this DC voltage output is applied to the light emitting diodes 26 to 29. Is done. Accordingly, the light emitting diodes 26 to 29 are turned on with the minimum light amount set as the reference signal Vref.
- the PWM dimming signal VDIM is generated from the dimming signal generation unit 34 at a time t1 that is delayed by the delay time period TD from the lighting device power on by the switch operation of the dimming operation unit 34.
- the PWM dimming signal (VDIM) is connected between the resistor 32 and the phototransistor 332 at the time t1 after the delay time TD as shown in FIG. Generated at point A.
- the connection point B between the resistor 41 and the capacitor 42 is grounded.
- the signal (VDIM) is not output to the connection point B, and during this predetermined time period T, more precisely, during the time period (T-TD), the PMW dimming output (Vdet) is canceled as shown in FIG. 4C. Therefore, the operational amplifier 40 does not generate a dimming output at a level corresponding to the PWM dimming signal (VDIM). Accordingly, the light emitting diodes 26 to 29 are turned on with the minimum light amount by the operation of the control circuit 44 to which the reference signal Vref is given as described above.
- the differential output appearing at the connection point between the capacitor 36 and the resistor 37 disappears, and the transistor 39 is turned off. Therefore, the PMW dimming signal (VDIM) appearing at the connection point A between the resistor 32 and the phototransistor 332 is transmitted to the connection point B between the resistor 41 and the capacitor 42, and the dimming output (Vdet) is generated as shown in FIG. 4C. Generated. As a result, the dimming output (Vdet) is amplified by the operational amplifier 40 and input to the control circuit 44 via the diode 43. Since the dimming output (Vdet) is larger than the reference signal Vref shown in FIG.
- the dimming output (Vdet) is input to the control circuit 44. Therefore, in the control circuit 44, a pulse signal having an on-duty ratio determined according to the level of the dimming output (Vdet) is generated and applied to the gate of the field effect transistor 18.
- the field effect transistor 18 is turned on / off by a pulse signal having an on-duty ratio corresponding to the level of the dimming output (Vdet). Therefore, an AC output voltage is supplied from the secondary winding 17b of the switching transformer 17 to the rectifying / smoothing circuit 25, converted into a DC voltage output by the rectifying / smoothing circuit 25, and this DC voltage output is applied to the light emitting diodes 26 to 29. Is done. Accordingly, the light emitting diodes 26 to 29 are lit with a light amount determined according to the level of the dimming output (Vdet).
- the dimming signal is canceled for a predetermined time period T immediately after the power is turned on, and the light emitting diodes 26 to 29 are turned on with a predetermined light amount (for example, the minimum light amount).
- the canceling of the dimming signal is canceled, and the light emitting diodes 26 to 29 are turned on with the amount of light indicated by the dimming signal. Therefore, the influence of the dimming signal can be surely eliminated for a predetermined time period T immediately after the power is turned on, and the phenomenon that the all-light state is instantaneously caused immediately after startup due to the output delay of the dimming signal is avoided. be able to. As a result, it is possible to obtain a lighting state with no sense of incongruity as a lighting fixture, and to improve the merchantability of the lighting fixture.
- the light emitting diodes 26 to 29 are turned on with a predetermined light amount (for example, the minimum light amount) for a predetermined time period T immediately after the power is turned on, and light is emitted with the light amount indicated by the dimming signal after the elapse of the predetermined time period T.
- the diodes 26 to 29 are turned on.
- the predetermined time period T it is also possible to turn off the light emitting diodes 26 to 29 and turn on the light emitting diodes 26 to 29 with a light amount indicated by the dimming signal after a predetermined time period T has elapsed.
- Modification 2 Further, if the set level of the reference signal Vref can be varied, a dimming function capable of arbitrarily adjusting the light amounts of the light emitting diodes 26 to 29 that are turned on in a predetermined time period T immediately after the power is turned on can be provided to the power supply device. it can.
- FIG. 5 shows a power supply circuit according to the second embodiment of the present invention.
- the same parts as those in FIG. 5 are identical to FIG. 5 in FIG. 5, the same parts as those in FIG. 5, the same parts as those in FIG. 5, the same parts as those in FIG.
- a series circuit of a capacitor 51 and a resistor 52 is connected between the connection point of the positive output terminal of the full-wave rectifier circuit 15 and the ripple current smoothing capacitor 16 and the ground.
- the series circuit of the capacitor 51 and the resistor 52 constitutes a differentiation circuit, and an output is generated at the connection point between the capacitor 51 and the resistor 52 for a predetermined time by the output from the ripple current smoothing capacitor 16.
- the base of the transistor 53 is connected to the connection point between the capacitor 51 and the resistor 52.
- the transistor 53 has an emitter grounded and a collector connected to the capacitor 36, and is turned on for a predetermined time by an output generated at a connection point between the capacitor 51 and the resistor 52.
- the AC power of the AC power supply 11 is supplied to the full-wave rectifier circuit 15 when the lighting fixture is turned on, and the ripple current smoothing capacitor 16 is supplied to the output of the full-wave rectifier circuit 15.
- the transistor 53 is turned on while the differential output is generated.
- the transistor 53 is turned on, the residual charge of the capacitor 36 is forcibly released in the direction of arrow D through the diode 38 and the transistor 53, and the differential circuit composed of the capacitor 36 and the resistor 37 is reset.
- the differentiation circuit composed of the capacitor 36 and the resistor 37 is forcibly reset. Therefore, it is possible to accurately set the predetermined time period T by the differentiation circuit of the capacitor 36 and the resistor 37, and it is possible to stably realize the operation for canceling the dimming signal for the predetermined time period T immediately after the power is turned on. .
- the present invention by canceling the dimming signal for a predetermined time immediately after the power is turned on, a phenomenon in which the dimming signal is output for a moment due to the output delay of the dimming signal can be avoided.
- the differentiation circuit that determines the predetermined time for canceling the dimming signal can be forcibly reset, so that the operation for canceling the dimming signal can be stably obtained.
- the differential circuit composed of the capacitor 36 and the resistor 37 is forcibly reset, and this operation is performed when the power is turned off or when the external signal is turned off. You may make it carry out.
- the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage.
- the example of the light emitting diode is described as the semiconductor light emitting element, but the present invention can be applied to the case where another semiconductor light emitting element such as a laser diode is used.
- the AC power supply 11 is described.
- the AC power supply 11 may be provided outside the apparatus.
- an example of an analog circuit has been described.
- a control method using a microcomputer or digital processing can also be adopted.
- the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent requirements. 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.
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Abstract
Description
一般的な放電灯の点灯回路では、電源投入直後に事前予熱の状態があり、多少の時間であれば回路が意図的にランプを点灯しないように設定されているため、あまり問題とならない。しかしながら、最近の光源として発光ダイオードなどの半導体発光素子を用いた照明器具では、調光信号の遅れが原因で起動直後に一瞬だけ全光状態になる現象が起こり易く、照明器具として点灯移行が不自然になり、商品性を著しく損ねるという問題がある。
交流電力が供給され、この交流電力を直流電力に変換して出力する直流出力生成手段と、
前記直流出力生成手段から出力された前記直流電力が供給されて発光される半導体発光素子と、
調光信号が入力され、この調光信号に応じて前記直流出力生成手段から出力される直流電力を制御する制御手段であって、前記交流電力の供給直後から所定時間期間の間、前記調光信号に基づく前記直流電力の制御をキャンセルして前記半導体発光素子を減光して点灯或いは消灯させるように前記直流出力生成手段を制御する制御手段と、
を具備する電源装置が提供される。
交流電力が供給され、調光信号に応じてこの交流電力を直流電力に変換して出力する直流出力生成手段と、
前記直流出力生成手段から出力された前記直流電力が供給されて発光される半導体発光素子と、
前記交流電力の供給直後から所定時間期間の間、前記半導体発光素子を予め定められた調光で減光して点灯或いは消灯させるように前記直流出力生成手段を制御し、前記所定時間期間経過後、前記調光信号に応じて前記直流出力生成手段から出力される直流電力を制御して前記調光信号に従って前記半導体発光素子を点灯する制御手段と、
を具備する電源装置が提供される。
上述した電源装置を有する器具本体を具備する照明器具が提供される。
図1及び図2は、本発明の実施の形態に係る電源装置が組み込まれる照明器具を示している。図1及び図2において、符号1は、器具本体を示し、この器具本体1は、アルミニウムをダイカストして作られ、両端を開口した略円筒状に形成されている。この器具本体1は、その内部が仕切り部材1a、1bにより上下方向に3つの空間部分に区分され、下方開口と仕切り部材1aの間の下部空間には、光源部2が設けられている。この光源部2には、半導体発光素子としての複数のLED2a及びLED2aからの光線を反射する反射体2bが設けられている。複数のLED2aは、下部空間に実装され、仕切り部材1a下面に設けられた円盤状の配線基板2cの円周方向に沿って等間隔に配置されている。
上述した実施の形態では、電源投入直後から所定時間期間Tだけ発光ダイオード26~29を所定の光量(例えば最小光量)で点灯させ、所定時間期間Tの経過後に調光信号が指示する光量で発光ダイオード26~29を点灯させるようにしている。しかし、例えば、基準信号Vrefのレベルを更に小さくして発光ダイオード26~29が点灯できない程度の信号レベル(制御回路44が動作可能なレベル)に設定すれば、電源投入直後から所定時間期間T、発光ダイオード26~29を消灯させ、所定時間期間Tの経過後に調光信号が指示する光量で発光ダイオード26~29を点灯させるようにすることもできる。
また、基準信号Vrefの設定レベルを可変できるようにすれば、電源投入直後から所定時間期間Tで点灯される発光ダイオード26~29の光量を任意に調整できる調光機能を電源装置に与えることができる。
さらに、上述の抵抗41とキャパシタ42による時定数が大きく設定しても良い。抵抗32及びフォトトランジスタ332の接続点Aの調光信号(VDIM)を基に、抵抗41及びキャパシタ42の接続点Bに出力される調光出力(Vdet)がある時間を掛けて緩やかに増加される。従って、この調光出力(Vdet)が上述した所定時間期間Tの経過後に発光ダイオード26~29を点灯させるのに必要な最小レベルを制御信号に与えるよう時定数が設定されれば、調光出力(Vdet)の増加に依存して定まるレベルを有する制御信号Vcontにより発光ダイオード26~29の明るさをフェードインさせるように制御回路44を制御することもできる。この変形例では、調光信号をキャンセルするための回路を構成するキャパシタ36と抵抗37の微分回路及びトランジスタ39を省略することができる。
次に、本発明の第2の実施の形態に係る電源回路を説明する。
また、本発明によれば、電源投入直後から調光信号をキャンセルする所定時間、半導体発光素子に点灯、消灯及び調光のいずれかの点灯状態を得られる。
Claims (7)
- 交流電力が供給され、この交流電力を直流電力に変換して出力する直流出力生成手段と、
前記直流出力生成手段から出力された前記直流電力が供給されて発光される半導体発光素子と、
調光信号が入力され、この調光信号に応じて前記直流出力生成手段から出力される直流電力を制御する制御手段であって、前記交流電力の供給直後から所定時間期間の間、前記調光信号に基づく前記直流電力の制御をキャンセルして前記半導体発光素子を減光して点灯或いは消灯させるように前記直流出力生成手段を制御する制御手段と、
を具備する電源装置。 - 前記制御手段は、基準信号に基づく第1の制御信号及び前記調光信号に基づく第2の制御信号を生成し、前記所定期間の間、前記第1の制御信号で前記半導体発光素子を減光して点灯或いは消灯させるように前記直流出力生成手段を制御し、前記所定期間の経過後、前記第2の制御信号で前記半導体発光素子を前記調光信号に従って点灯させるように前記直流出力生成手段を制御する請求項1記載の電源装置。
- 前記制御手段は、前記調光信号に基づく第2の制御信号を生成する生成回路と、前記交流電力の供給に応答して微分信号を出力する抵抗及びキャパシタから成る微分回路と、前記所定期間より短い第2の時間期間の間前記微分信号でオン動作され、前記生成回路を短絡するスイッチング素子と、及び前記交流電力の供給直後に前記キャパシタを放電するリセット回路を含み、前記微分回路は、前記キャパシタの放電後に前記微分信号を発生する請求項1記載の電源装置。
- 請求項1乃至3のいずれかに記載の電源装置と、
前記電源装置を有する器具本体と、
を具備する照明器具。 - 交流電力が供給され、調光信号に応じてこの交流電力を直流電力に変換して出力する直流出力生成手段と、
前記直流出力生成手段から出力された前記直流電力が供給されて発光される半導体発光素子と、
前記交流電力の供給直後から所定時間期間の間、前記半導体発光素子を予め定められた調光で減光して点灯或いは消灯させるように前記直流出力生成手段を制御し、前記所定時間期間経過後、前記調光信号に応じて前記直流出力生成手段から出力される直流電力を制御して前記調光信号に従って前記半導体発光素子を点灯する制御手段と、
を具備する電源装置。 - 前記制御手段は、前記所定時間期間の間、前記半導体発光素子をフェードイン点灯させるように前記直流出力生成手段を制御する請求項5記載の電源装置。
- 請求項5及び請求項6のいずれかに記載の電源装置と、
前記電源装置を有する器具本体と、
を具備する照明器具。
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EP09725489.0A EP2257129B1 (en) | 2008-03-24 | 2009-03-24 | Power supply device and illuminating apparatus provided with power supply device |
CN200980107917.9A CN101971703B (zh) | 2008-03-24 | 2009-03-24 | 电源装置及具有该电源装置的照明器具 |
BRPI0910428A BRPI0910428A2 (pt) | 2008-03-24 | 2009-03-24 | dispositivo de suprimento de energia e equipamento de iluminação |
US12/873,759 US8441204B2 (en) | 2008-03-24 | 2010-09-01 | Power supply device and lighting equipment provided with power supply device |
US13/799,341 US9226357B2 (en) | 2008-03-24 | 2013-03-13 | Power supply device and lighting equipment provided with power supply device |
US13/799,394 US8884540B2 (en) | 2008-03-24 | 2013-03-13 | Power supply device and lighting equipment provided with power supply device |
US14/108,972 US20140132170A1 (en) | 2008-03-24 | 2013-12-17 | Power Supply Device and Lighting Equipment Provided with Power Supply Device |
US14/109,123 US20140132168A1 (en) | 2008-03-24 | 2013-12-17 | Power Supply Device and Lighting Equipment Provided with Power Supply Device |
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JP2012034492A (ja) * | 2010-07-30 | 2012-02-16 | Mitsumi Electric Co Ltd | 絶縁型電源装置および照明装置 |
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JP2012034490A (ja) * | 2010-07-30 | 2012-02-16 | Mitsumi Electric Co Ltd | 絶縁型電源装置および照明装置 |
JP2012034489A (ja) * | 2010-07-30 | 2012-02-16 | Mitsumi Electric Co Ltd | 絶縁型電源装置および照明装置 |
CN103222173A (zh) * | 2010-07-30 | 2013-07-24 | 三美电机株式会社 | 绝缘型电源装置及照明装置 |
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Also Published As
Publication number | Publication date |
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EP2257129A1 (en) | 2010-12-01 |
EP2257129A4 (en) | 2012-09-19 |
US8884540B2 (en) | 2014-11-11 |
CN101971703A (zh) | 2011-02-09 |
US8896225B2 (en) | 2014-11-25 |
US20140132170A1 (en) | 2014-05-15 |
US20130193880A1 (en) | 2013-08-01 |
BRPI0910428A2 (pt) | 2017-04-04 |
US20110057577A1 (en) | 2011-03-10 |
JP2009232625A (ja) | 2009-10-08 |
US9226357B2 (en) | 2015-12-29 |
JP4636102B2 (ja) | 2011-02-23 |
US20130193863A1 (en) | 2013-08-01 |
US8441204B2 (en) | 2013-05-14 |
EP2257129B1 (en) | 2020-05-06 |
US20140132168A1 (en) | 2014-05-15 |
RU2442300C1 (ru) | 2012-02-10 |
CN101971703B (zh) | 2014-07-30 |
US20150250040A9 (en) | 2015-09-03 |
US20140132171A1 (en) | 2014-05-15 |
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