WO2004110110A1 - 放電ランプ点灯装置 - Google Patents
放電ランプ点灯装置 Download PDFInfo
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- WO2004110110A1 WO2004110110A1 PCT/JP2004/007069 JP2004007069W WO2004110110A1 WO 2004110110 A1 WO2004110110 A1 WO 2004110110A1 JP 2004007069 W JP2004007069 W JP 2004007069W WO 2004110110 A1 WO2004110110 A1 WO 2004110110A1
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- Prior art keywords
- voltage
- discharge lamp
- phase
- dimming
- controlled
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Classifications
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/2806—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without electrodes in the vessel, e.g. surface discharge lamps, electrodeless discharge lamps
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to a discharge lamp lighting device, and more particularly to a discharge lamp lighting device to which an AC voltage phase-controlled by a dimmer is input.
- Fluorescent lamps which are discharge lamps, have higher efficiency and longer life than incandescent lamps, and are widely used in terms of global environmental protection and economy.
- light bulb-type fluorescent lamps in which fluorescent lamps and lighting circuits are integrated, are attracting attention as energy-saving light sources in houses, hotels, restaurants, etc. is there.
- electrodeless bulb-type fluorescent lamps without electrodes have attracted attention as economical light sources because their lifespan is several times longer than conventional bulb-type fluorescent lamps with electrodes, and demand is increasing. .
- the brightness can be suitable for each venue.
- the brightness can be easily changed by using a commercially available light dimmer.
- Dimming of incandescent lamps is a method of changing the brightness by turning on and off the commercial power supply voltage and changing the on-time, that is, a dimmer for a light bulb to input a phase-controlled voltage to the incandescent lamp. Is generally used.
- Patent No. 283110 16 Publication Japanese Patent Application Laid-Open No. 2-1999796 Reference and Japanese Patent Application Laid-Open No. 2000-26892).
- the fluorescent lamp In the case where the dimmable lighting of the electrode-equipped fluorescent lamp is performed by dimming, the fluorescent lamp is often used by being connected to a commercially available dimmer for a light bulb. In this case, any light bulb dimmer that is commercially available should be able to dimming in principle, but depending on the light bulb dimmer, the lamp can normally be dimmed.
- the inventors of the present application have found out from the actual test that there is a possibility that flickering may not occur, and that a problem may occur when the fluorescent lamp is difficult to light.
- An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a discharge lamp lighting device that prevents flicker and difficulty in lighting and realizes a stable dimming operation. Disclosure of the invention
- a first discharge lamp lighting device of the present invention includes a discharge lamp, a rectifier for rectifying an AC voltage phase-controlled by a dimmer, and a DC voltage by removing a ripple component from an output voltage of the rectifier.
- a smoothing unit that converts the DC voltage into a high-frequency voltage; a lighting period in which the high-frequency voltage is applied to the discharge lamp for lighting; and a light-off period in which the generation of the high-frequency voltage is stopped and the discharge lamp is turned off.
- an inverting portion for intermittently driving the discharge lamp, and a dimming signal that is a square wave corresponding to a conduction period of the phase-controlled AC voltage while detecting a turn-on of the phase-controlled AC voltage.
- a dimming control unit for outputting, and an intermittent drive control unit for intermittently operating the chamber unit in response to the dimming signal
- the dimming control unit includes a rectifying unit and the smoothing unit.
- a diode for blocking a current from the smoothing unit, an impedance element for dividing an output voltage from the rectifying unit, and a voltage which is equal to or higher than a predetermined value.
- a Zener diode that conducts if present, and the Zener diode A first switch element that turns on when the diode is conducting and turns off when the diode is non-conducting, and outputs a switch signal that is a rectangular wave corresponding to the non-conducting period of the phase-controlled AC voltage; and inverts the switch signal.
- At least a second switch element for outputting the dimming signal, which is a rectangular wave corresponding to a conduction period of the phase-controlled AC voltage, for intermittently driving the turn-on and the chamber overnight.
- the dimming lighting is performed by substantially synchronizing the lighting timing with the lighting timing, and changing the ratio between the lighting period and the light-off period according to the dimming signal.
- a second discharge lamp lighting device includes a discharge lamp, a rectifier for rectifying an AC voltage phase-controlled by a dimmer, and a DC voltage by removing a ripple component from an output voltage of the rectifier.
- a smoothing unit that converts the DC voltage into a high-frequency voltage; a lighting period in which the high-frequency voltage is applied to the discharge lamp for lighting; and a light-off period in which the generation of the high-frequency voltage is stopped and the discharge lamp is turned off.
- an inverting portion for intermittently driving the discharge lamp, and a dimming signal that is a square wave corresponding to a conduction period of the phase-controlled AC voltage while detecting a turn-on of the phase-controlled AC voltage.
- a dimming control unit for outputting, and an intermittent drive control unit for intermittently operating the inverter unit in accordance with the dimming signal, wherein the dimming control unit is provided between the rectifying unit and the smoothing unit.
- a diode configured to block current from the smoothing unit; an impedance element configured to divide an output voltage from the rectifying unit; and a zener diode that conducts when the divided voltage is equal to or more than a predetermined value.
- a first switch that is turned on when the zener diode is turned on and turned off when not turned on, and outputs a switch signal that is a square wave corresponding to the non-conduction period of the phase-controlled AC voltage.
- a second switch element that inverts the switch signal and outputs the dimming signal that is a rectangular wave corresponding to the conduction period of the phase-controlled AC voltage. It is possible to maintain a constant shift amount between the ON and the interim drive lighting of the intermittent drive section and to change the ratio between the lighting period and the light-off period according to the dimming signal. Lit more dimming.
- a third discharge lamp lighting device includes: a discharge lamp; a rectifying unit that rectifies an AC voltage phase-controlled by a dimmer; and a smoothing unit that converts the phase-controlled AC voltage into a DC voltage. Transforming the DC voltage to a high frequency voltage at which the discharge lamp is turned on.
- a lighting period in which the discharge lamp is intermittently driven includes a lighting period in which the discharge lamp is turned on, and a light-out period in which the DC voltage is converted into a high frequency voltage at which the discharge lamp is not turned on and applied to the discharge lamp.
- a dimming control unit that detects an on-on state of the phase-controlled AC voltage and outputs a dimming signal proportional to a conduction period of the phase-controlled AC voltage;
- An intermittent drive control unit for intermittently operating the inverter unit in accordance with a signal, wherein the dimming control unit is disposed between the rectifying unit and the smoothing unit, and blocks a current from the smoothing unit.
- Dimming lighting is performed by synchronizing the timing of lighting and changing the ratio between the lighting period and the extinguishing period according to the dimming signal.
- a fourth discharge lamp lighting device includes: a discharge lamp; a rectifying unit that rectifies an AC voltage phase-controlled by a dimmer; and a smoothing unit that converts the phase-controlled AC voltage into a DC voltage.
- a dimming control unit that outputs an optical signal; and an intermittent drive control unit that intermittently operates the receiver unit in accordance with the dimming signal, wherein the dimming control unit is provided between the rectifying unit and the smoothing unit. set on A diode for blocking the current from the smoothing unit, an impedance element for dividing the output voltage from the rectifying unit, and a zener that conducts when the divided voltage is equal to or more than a predetermined value. The diode is turned on when the zener diode is turned on and turned off when it is not turned on, so that the phase-controlled AC voltage is turned off.
- a first switch element that outputs a switch signal that is a rectangular wave according to the conduction period, and the dimming signal that is a rectangular wave corresponding to the conduction period of the phase-controlled AC voltage by inverting the switch signal.
- At least a second switching element that outputs the light control signal, and maintains a constant deviation amount between the turn-on and the lighting of the intermittent drive of the chamber overnight, and the light control signal Dimming lighting is performed by changing the ratio between the lighting period and the light-off period accordingly.
- the dimming control unit has a configuration to output a signal for turning off the discharge lamp before lighting of the discharge lamp becomes unstable.
- the dimming control unit outputs only a signal for turning off the discharge lamp when the phase control angle of the phase-controlled AC voltage is larger than 150 degrees.
- the dimming control unit includes: a first transistor serving as the first switch element having a base terminal connected to an anode terminal of the zener diode; a collector terminal of the first transistor; and a DC power supply circuit. And a second transistor which is the second switch element having a base terminal connected thereto, and a collector terminal of the second transistor is preferably connected to the intermittent control section.
- the intermittent drive control unit includes at least a third switch element, and switches the drive state of the receiver unit with the third switch element.
- the inverter circuit has a complementary configuration including an n-channel FET and a p-channel FET, and the third switching element short-circuits between the drain and gate of the n-channel FET to form the inverter. It is preferable to switch the driving state of the evening circuit.
- the discharge lamp is an electrodeless fluorescent lamp. In a preferred embodiment, the discharge lamp is an electroded fluorescent lamp. Further, it is preferable that a base is provided, and the base, the discharge lamp, and a lighting circuit for lighting the discharge lamp are assembled in a body.
- FIG. 1 is a schematic circuit configuration diagram of a discharge lamp lighting device according to Embodiment 1 of the present invention. is there.
- FIG. 2 is a diagram showing a circuit and lamp characteristics in the discharge lamp lighting device according to the first embodiment.
- FIG. 3 is a schematic circuit configuration diagram of a discharge lamp lighting device according to Embodiment 2 of the present invention.
- FIG. 4 is a diagram showing a circuit and lamp characteristics in the discharge lamp lighting device according to the second embodiment.
- FIG. 5 is a specific circuit configuration diagram of the discharge lamp lighting device according to the first embodiment of the present invention.
- FIG. 6 is a schematic circuit configuration diagram of a discharge lamp lighting device according to Embodiment 3 of the present invention.
- FIG. 7 is a schematic sectional view of a discharge lamp lighting device according to a fourth embodiment of the present invention.
- FIG. 8 is a schematic circuit diagram of a conventional electrode discharge lamp lighting device.
- FIG. 9 is a schematic circuit configuration diagram of an asynchronous type discharge lamp lighting device.
- FIG. 10 is a diagram showing a circuit and lamp characteristics in the discharge lamp lighting device according to the second embodiment.
- FIG. 11 is a diagram showing a circuit and lamp characteristics in the discharge lamp lighting device of FIG.
- FIG. 12 is a diagram illustrating another circuit and lamp characteristics in the discharge lamp lighting device according to the first embodiment.
- FIG. 13 is a diagram showing circuit characteristics of the discharge lamp lighting device according to the fifth embodiment.o Best mode for carrying out the invention
- This discharge lamp lighting device uses a frequency change method in which dimming is performed by changing the operating frequency of the circuit, and changes the brightness of the fluorescent lamp according to the conduction angle of the input phase-controlled voltage, that is, the conduction period (ON period) of the voltage. Things.
- the discharge lamp lighting device shown in FIG. 8 includes a phase control device 102 connected to a commercial power supply 101, a high-frequency generator 103, and a fluorescent lamp 108. It comprises a detecting means 109 for detecting the conduction angle of the phase control voltage, and a light detecting section 110 for detecting the light output of the fluorescent lamp.
- the high-frequency generator 103 includes a high-frequency blocking filter 104, a rectifier 105, and a smoothed DC voltage converter 106 that converts the phase-controlled voltage to a smoothed DC voltage. And an inverter unit 107 for converting the DC conversion voltage into a high frequency.
- the inverter unit 107 includes a switching unit 171 and an oscillation control unit 172 for generating a signal for controlling the switching unit 107.
- the detecting means 109 changes the output frequency of the oscillation control section of the inverter section 107 in accordance with the detected conduction angle. By changing the output frequency, the light output from the discharge lamp changes.
- the light detection unit 110 changes the output frequency of the oscillation control unit 172 according to the light detection amount.
- the phase of AC power from a power supply is controlled with a triac, the full-wave rectified output is supplied to an inverter circuit, and the high-frequency output is supplied to a discharge lamp to reduce the lamp current.
- a phase control method for limiting and dimming.
- this phase control method if the dimming is made deeper by setting the conduction angle of the triac closer to 7 °, phenomena such as discharge lamp extinguishing or flickering will occur.
- the discharge lamp lighting device connected to an electric input through a light bulb dimmer, the discharge lamp more easily extinguishes and flickers.
- the switching frequency of the circuit is fixed.
- the switching element is turned on and the electrodeless fluorescent light is turned on.
- the dimming command signal is not synchronized with the turn-on of the phase-controlled voltage, the voltage will increase each time the lamp is started. It is thought that the lamp will flicker because it changes.
- the on / off timing of the voltage whose phase is controlled by the triac is detected by using a zener diode as a detecting means, and an inversion is performed by a dimming command signal generated based on this.
- I came up with the idea of turning on the switching element of the evening circuit in synchronization with the evening-on timing of the phase-controlled voltage.
- the present inventors have realized that the timing of turning on and off the phase control voltage and the timing of turning on and off the dimming command signal using the zener diode are practically used.
- a dimming control unit that synchronizes with the above, a discharge lamp lighting device that does not generate flicker and performs stable dimming operation has been realized.
- FIG. 1 schematically shows a configuration of a discharge lamp lighting device according to a first embodiment of the present invention.
- the discharge lamp lighting device includes an electrodeless fluorescent lamp 3, which is a discharge lamp, a dimmer 2 for controlling the phase of the voltage of the commercial power supply 1, and an AC voltage whose phase is controlled by the dimmer 2. And a lighting circuit 4 for dimming the electrodeless fluorescent lamp 3 accordingly.
- the commercial power supply 1 is, for example, an AC power supply of 60 Hz and 100 V, and is connected to the dimmer 2.
- the dimmer 2 is a dimmer using well-known phase control using a triac. For example, a commercially available dimmer for an incandescent lamp can be used.
- the phase control is performed in the range of 0 to 180 degrees.
- an AC voltage whose phase is controlled to 60 degrees means that the voltage is 0 between 0 and 60 degrees (the non-conduction period). ), Between 60 and 180 degrees is the original AC voltage as it is (conduction period).
- the lighting circuit 4 includes a rectifying unit 5, a smoothing unit 6, an inverter unit 7, a dimming control unit 8, and an intermittent drive control unit 9.
- the rectifier 5 performs full-wave rectification on the phase-controlled AC voltage supplied from the dimmer 2.
- a diode bridge can be used.
- the smoothing unit 6 removes a ripple component from the voltage rectified by the rectification unit 5 and converts the voltage into a smoothed DC voltage.
- Examples of the smoothing section 6 include a smoothing capacitor such as an electrolytic capacitor.
- the inverter section 7 is composed of an oscillation circuit 17, a drive circuit 18, MOSFETs 12 and 13, a resonance inductor 14, and first and second resonance capacitors 15 and 16. I have. A series circuit of the second resonance capacitor 16 and the induction coil 11 is connected in parallel to the first resonance capacitor 15.
- the induction coil 11 and the electrodeless discharge valve 10 constitute an electrodeless fluorescent lamp 3.
- the dimming control unit 8 is arranged between the rectifying unit 5 and the smoothing unit 6 and connected to both, and outputs a rectangular wave dimming signal corresponding to the conduction period of the AC voltage phase-controlled by the dimmer 2. Output.
- the rectangular dimming signal corresponding to the conduction period of the phase-controlled AC voltage is defined as a rectangular wave that is a dimming signal when the conduction period is changed by operating the dimmer 2. This means that the duty ratio changes in the same manner.
- the intermittent drive control unit 9 includes at least a switch that operates as a third switch element.
- the switching state of the switch element is controlled by turning on and off the switch element in response to the dimming signal from the dimming control section 8 to control the connection state between the oscillation circuit 17 and the driving circuit 18 of the inverter section. Section 7 is driven intermittently.
- the output voltage of the commercial power supply 1 is phase-controlled by the dimmer 2, and the AC voltage whose phase is controlled by the dimmer 2 is converted to a DC voltage by the rectifier 5 and the smoother 6.
- the DC voltage smoothed by the rectifying unit 5 and the smoothing unit 6 is supplied to the driving circuit 18 connected to the MOS FETs 12 and 13 of the inverter unit 7 and the driving frequency f 1 (H z) of the oscillation circuit 17.
- the output is converted to a high-frequency voltage by turning on and off the MOS FETs 12 and 13 alternately.
- This high-frequency voltage is applied to a resonance circuit including the resonance inductor 14, the first and second resonance capacitors 15 and 16, and the induction coil 11.
- An AC electromagnetic field is generated in the electrodeless discharge bulb 10 by the current flowing through the induction coil 11.
- the luminous gas (not shown) sealed in the electrodeless discharge bulb 10 is excited and emits light by the energy supplied by the AC electromagnetic field.
- the luminescent gas for example, mercury, krypton, xenon, or a mixed gas thereof is used.
- the on / off timing of the AC voltage whose phase is controlled by the dimmer 2 is detected by the dimming control unit 8, and a rectangular shape corresponding to the conduction period of the phase-controlled voltage is detected.
- a dimming signal which is a wave, is output.
- This dimming signal is an ON signal for operating the inverter unit 7 to turn on the electrodeless fluorescent lamp 3, and this ON signal is output to the intermittent drive control unit 9.
- the switch element of the intermittent drive control unit 9 is turned on, and the signal from the oscillation circuit 17 is transmitted to the drive circuit 18, so that the MOS FETs 12 and 13 have the frequency f Driven at 1 (Hz), inverter 7 outputs high-frequency voltage.
- the electrodeless fluorescent lamp 3 is turned on.
- the intermittent drive control unit 8 outputs a dimming signal from the dimming control unit 8 as a dimming signal to stop the luminaire unit 7 and turn off the electrodeless fluorescent lamp 3. Output to 9.
- the switch element of the intermittent drive control section 9 is turned off, and the signal from the oscillation circuit 17 is cut off so that the signal from the oscillation circuit 17 is not transmitted to the drive circuit 18. Because of this, MO S FET 12 13 is not driven, and the high frequency voltage is not output from the inverter 7. Thus, the electrodeless fluorescent lamp 3 is turned off.
- FIG. 5 is a circuit diagram of the electrodeless discharge lamp lighting device of the present embodiment.
- the rectifier circuit section 5 is configured by a diode bridge DB1.
- the AC voltage whose phase is controlled by the dimmer 2 is full-wave rectified by the diode bridge DB 1 of the rectifier 5.
- the smoothing section 6 is composed of an electrolytic capacitor C1.
- the voltage waveform that has been subjected to full-wave rectification by the rectification unit 5 is converted into a substantially constant direct current by removing a ripple component by the electrolytic capacitor C1. .
- the inverter unit 7 includes a resistor R1, first and second MOSFETs 12, 13, a resonance inductor 14, first and second resonance capacitors 15, 16, an oscillation circuit 17, and a It is composed of a circuit 18.
- the inverter section 7 has a self-oscillation configuration of a complementary configuration in which the first MOSFET 12 is an n-channel FET and the second MOSFET 13 is a p-channel FET. Note that the first MOSFET 12 is on the high side and the second MOSFET 13 is on the mouth side.
- the oscillation circuit 17 is configured by a secondary winding of the resonance inductor 14.
- the drive circuit 18 includes an inductor L1, capacitors C2 and C3, a Zener diode ZD1, ZD2, a resistor R2, and a diode D1.
- the AC voltage input from the commercial power supply 1 to the dimmer 2 and subjected to phase control is converted into a substantially constant DC voltage by the rectifying unit 5 and the smoothing unit 6.
- the inverter circuit 7 when C 3 is charged via R 1 and R 2 and becomes equal to or higher than the gate threshold voltage of the second MOS FET 13, the second MOSFET 13 is turned on and the inverter circuit 7 is turned on. Starts.
- the inverter part 7 When the inverter part 7 is activated, a current flows through the resonance inductor 14, so that an electromotive force is generated in the secondary winding of the resonance inductor 14.
- This electromotive force is oscillated by the inductor L1 and the capacitor C2 of the drive circuit 18 to output a drive signal for driving the first and second MOSFETs 12, 13.
- the first and second MOSFETs 12 and 13 alternately turn on and off alternately, and convert the DC voltage from the smoothing unit 6 into a high-frequency voltage of frequency f1.
- This frequency: f 1 (H z) is determined by the inductor 14, the first and second resonance capacitors 15, 16, and the induction coil 11.
- the Zener diodes ZD 1 and ZD 2 are arranged for the purpose of protecting the first and second MOSFETs 12 and 13.
- the high-frequency voltage is applied to the electrodeless fluorescent lamp 3, and a high-frequency current flows through the induction coil 11.
- a high-frequency current flows through the induction coil 11
- an electromagnetic field is generated around the induction coil 11, and the electromagnetic field supplies energy to the electrodeless discharge bulb 10.
- the luminous gas sealed in the electrodeless discharge bulb 10 is excited to generate ultraviolet radiation, and the ultraviolet radiation excites a phosphor (not shown) coated in the electrodeless discharge bulb 10.
- Light is emitted, and the electrodeless fluorescent lamp 3 is turned on.
- the dimming control unit 8 is an impedance element that divides the output voltage from the rectifying unit 5, R 3, R 4, and a zener that conducts when the voltage divided by R 3 and R 4 is a predetermined value or more.
- the first switch element that outputs a rectangular wave dimming signal according to the conduction period of the AC voltage that is turned on and off according to the signal from the diode ZD 3 and the zener diode ZD 3 and is phase-controlled.
- the values of the resistors R 3 and R 4 and the voltage of the diode ZD 3 are applied.
- the turn-on timing of the Zener diode ZD3 is synchronized with the turn-on timing of the phase-controlled AC voltage. That is, the turn-on of the AC voltage whose phase is controlled by this process diode ZD 3 is detected.
- the collector voltage of the transistor Q1 is at the Lo level during the conduction period of the phase-controlled AC voltage, and is at the Hi level during the non-conduction period of the phase-controlled AC voltage. That is, the transistor Q1 outputs a switch signal that is a rectangular wave corresponding to the non-conduction period of the phase-controlled AC voltage.
- a circuit for inverting the collector voltage of the transistor Q1 includes a DC power supply circuit, a resistor R5, and a transistor Q2. The collector of the transistor Q1 and the DC power supply circuit are connected to the base of the transistor Q2, and the collector of the transistor Q2 is connected to the intermittent control unit 9.
- the transistor Q1 When the transistor Q1 is off, the base current is supplied from the DC power supply circuit to the transistor Q2, the transistor Q2 is turned on, and the collector voltage (dimming signal) of the transistor Q2 becomes Lo level. Also, when the transistor Q1 is on, the base current is not supplied from the DC power supply circuit to the transistor Q2, so that the transistor Q2 is turned off, and the collector voltage (dimming signal) of the transistor Q2 becomes Hi level. It becomes.
- This substantially synchronizes with the ON of the phase-controlled AC voltage, and forms a square wave dimming signal corresponding to the conduction period of the AC voltage.
- Substantial synchronization is synchronization that includes a short delay such as a delay in the response time of each element in the circuit. Such a short delay does not affect the light emission output because it is sufficiently shorter than the period of the input AC voltage.
- the intermittent drive control unit 9 includes a transistor Q3 as a third switch element for switching the drive state of the inverter unit 7, and resistors R6 and R7.
- the transistor Q3 When the dimming signal is at the Hi level, the transistor Q3 is off, so that the drive circuit 18 generates a predetermined drive signal for driving the first and second MOSFETs 12, 13. Therefore, the inverter section 7 operates at a predetermined frequency: 1 (Hz), and the electrodeless fluorescent lamp 3 is turned on.
- the transistor Q3 when the dimming signal is at the Lo level, the transistor Q3 is turned on, so that the drain of the first MOSFET 12, which is an n-channel FET, is drained. The short circuit between the in-gate and the non-conductive state is performed, and the driving of the first and second MOSFETs 12 and 13 is stopped.
- the drive circuit 18 cannot generate a predetermined drive signal (gate signal) for driving the first MOSFET 12, so that the invar unit 7 is stopped and the electrodeless fluorescent lamp 3 is turned off.
- the short circuit between the drain and the gate of the second MOSFET 13 which is a p-type FET on the low voltage side (one side of the mouth) similarly destroys the circuit, so that the drain of the first MOSFET 12 Short circuit. It is unknown what causes the circuit to be destroyed if the drain-gate of the second MOSFET 13 is short-circuited, but probably the P-type FET generally has a lower breakdown voltage than the n-type FET. Also, if the drain-gate of the p-type FET on the low voltage side is short-circuited, the gate will be short-circuited to GND, causing abnormal current in the circuit. I am guessing.
- the inverter 7 repeatedly drives and stops according to the dimming signal from the dimming controller 8 (see Fig. 2b).
- the ratio (duty ratio) between the Hi-level period and the Lo-level period of the dimming signal changes, and therefore, the time ratio of driving and stopping the invar evening 7 changes.
- the electrodeless discharge lamp 3 can be dimmed.
- a DC power supply circuit exists independently, but instead of this DC power supply circuit, the terminal of R5 opposite to the terminal connected to transistor Q2 is connected to a diode.
- the DC power supply circuit may be connected to the cathode of D2.
- the conduction period of the AC voltage whose phase is controlled by the dimmer 2 changes depending on the degree of dimming.
- the ratio of the ON period and the OFF period of the switch element of the intermittent drive control unit 9 determined by the dimming signal from the dimming control unit 7 changes, and further, the drive period of the inverter unit 7 changes accordingly.
- the ratio of the stop period (called the duty ratio) changes.
- FIG. 2A shows a waveform of an AC voltage phase-controlled by the dimmer 2, and the phase-controlled voltage is first subjected to full-wave rectification by the rectifier 5. From the full-wave rectified voltage waveform, the turn-on of the phase-controlled AC voltage waveform (Fig. 2a) is detected by the Zener diode ZD3, and according to the AC voltage conduction period, as described above. As a result, a rectangular dimming signal as shown in Fig. 2b is output.
- the Hi level is an ON signal
- the Lo level is a 0 FF signal.
- the dimming signal is transmitted to the intermittent driving unit 9, and the switch element of the intermittent driving unit 9 is turned on / off in response to the dimming signal, whereby the first and second MOs of the inverter unit 7 are turned on and off.
- the SFETs 12 and 13 are driven at the drive frequency f 1 (Hz) or stopped.
- f 1 Hz
- the waveform of the drain current of the first MOSFET 12 and the waveform of the dimming signal and the time axis are shown as an example.
- the drain current of the second MOSFET 13 is the same as the drain current of the first MOSFET 12.
- FIG. 2d shows the emission output waveform from the electrodeless discharge lamp.
- the driving of the MOSFETs 12 and 13 is turned on in synchronization with the turn-on of the AC voltage whose phase is controlled by the dimmer 2, and the electrodeless fluorescent lamp 3 corresponding thereto is turned on. It was experimentally confirmed that a light emission output from was obtained.
- the discharge lamp lighting device according to the present invention in which the drive timing of the inverter 7 is accurately synchronized with the ON of the AC voltage whose phase is controlled by the dimmer 2 (FIG. 1), has no flicker. It was also confirmed that the light output was high.
- the MOS FET is used as the switching element.
- a power transistor may be used.
- the frequency of the high-frequency voltage applied to the electrodeless fluorescent lamp 3 by the lighting circuit 4 in the bulb-type electrodeless fluorescent lamp of the present embodiment will be briefly described.
- the frequency is 1 MHz or less (for example, 50 to 500 kHz) as compared with 13.56 MHz or several MHz in the ISM band which is generally used practically in electrodeless fluorescent lamps.
- This is a relatively low frequency region.
- the reasons for using frequencies in this low frequency range are as follows. First, 13. When operating in a relatively high frequency range, such as 56 MHz or several MHz, the noise filter for suppressing line noise generated from the high-frequency power supply circuit in the lighting circuit (circuit board) becomes large, The volume of the power supply circuit increases.
- the noise radiated or transmitted from the lamp is high-frequency noise, very strict regulations are imposed on high-frequency noise by law.To meet these regulations, an expensive shield must be provided. Must be used, which is a major obstacle in reducing costs.
- inexpensive general-purpose products used as electronic components for general electronic equipment can be used as members constituting a high-frequency power supply circuit, Since it is possible to use members with small dimensions, cost and size can be reduced, and the advantage is large.
- the electrodeless fluorescent lamp of the present embodiment is not limited to the operation at 1 MHz or less, and can be operated in a frequency region such as 13.56 MHz or several MHz.
- the intermittent drive of the inverter unit is performed in synchronization with the turn-on of the voltage whose phase is controlled by the dimmer 2, thereby performing the adjustment.
- the electrodeless fluorescent lamp for light can be stably lit and dimmed, and there are no problems such as flicker due to unstable lighting as described in the section to be solved and non-lighting.
- the discharge lamp lighting device is a discharge lamp lighting device for dimming and lighting an electrodeless fluorescent lamp, and is similar to the configuration described in the first embodiment. , Imba Night Club 7 is different.
- FIG. 3 schematically shows a lighting circuit of a discharge lamp lighting device according to Embodiment 2 of the present invention.
- the same components as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
- the inverter section 7 includes an oscillation circuit a 17 a, an oscillation circuit b 17 b, a driving circuit 18, a MOSFET 12, 13, a resonance inductor 14, a first and a second resonance capacitor 15, 16 It is composed of
- the oscillation frequency of the oscillation circuit a 17 a is f 1 (Hz)
- the oscillation frequency of the oscillation circuit b 17 b is: f 2 (Hz) Yes
- frequency: e 2 is set to a higher frequency than frequency 1.
- the intermittent drive control unit 9 switches the switch element according to the dimming signal from the dimming control unit, and connects the oscillation circuit a 17 a to the driving circuit 18 when the dimming signal is at the Hi level.
- the oscillation circuit b 17 b and the drive circuit 18 are connected.
- the lighting principle of the discharge lamp is the same as in the first embodiment, and will not be described again.
- the circuit configuration and operation of the dimming control unit 8 with respect to the phase-controlled AC voltage input from the dimmer 2 to the dimming control unit 8 are also basically the same as those in the first embodiment, and detailed description is omitted. .
- the switching element causes the oscillation circuit to have an oscillation frequency of f1 (Hz) a 17 a
- the drive circuit 18 are connected, and the M 0 SFETs 12 and 13 of the inverter 7 are turned on and off alternately at the frequency 1 (Hz).
- a high-frequency voltage having a frequency f 1 (Hz) is generated.
- the resonance inductor 14 the first and second resonance capacitors 15, 16 and the induction coil 11 are set so that the electrodeless discharge bulb 10 is lit at a frequency of 1, the electrodeless fluorescent lamp is used. 3 lights up o
- the switching circuit connects the oscillating circuit b 17 b having the oscillating frequency of f 2 (Hz) to the driving circuit 18, and the MOSFETs 12 and 13 of the inverter section 7 are connected. , Turns on and off alternately at frequency f 2 (Hz).
- the resonance inductor 14, the first and second resonance capacitors 15, 16 and the induction coil 11 are set so that the electrodeless discharge bulb 10 is turned on at the frequency f1.
- the current flowing through the induction coil 11 decreases, and the power supplied to the electrodeless bulb 10 decreases. In this case, the electrodeless fluorescent lamp 3 does not turn on.
- the high-frequency voltage of two frequencies f 1, which is the frequency at which the electrodeless fluorescent lamp 3 is lit, and f 2, which is the frequency at which the electrodeless fluorescent lamp 3 is not lit (cannot be lit), is applied to the switch element of the intermittent control drive unit 9. Depending on One of them is selected and applied to the electrodeless fluorescent lamp 3.
- the voltage waveform of the phase-controlled voltage, the waveform of the dimming command signal, the waveform of the drain current of the MOSFET 12, and the emission waveform of the electrodeless fluorescent lamp 3 are Figure 4a to d show it respectively.
- the energy for lighting the electrodeless discharge bulb 10 at the start of lighting in the next lighting period can be reduced.
- the energy for lighting is reduced, the lighting becomes easier, and as a result, the light flux rises faster (the rise of the light emission output in FIG. 4d becomes steeper than that in FIG. 2d).
- the dimming of the electrodeless fluorescent lamp 3 is deepened, that is, even if the duty ratio is reduced, the dimming can be surely synchronized with the phase-controlled AC voltage. Lighting is possible.
- FIG. 6 is a circuit diagram of a discharge lamp lighting device according to a third embodiment.
- the discharge lamp is an electroded fluorescent lamp 31 and the configuration of the load resonance circuit for lighting the electrodeed fluorescent lamp 31 is different.
- the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- a resonance circuit composed of a fluorescent lamp 31, a resonance inductor 14, and resonance capacitors 32, 33 is connected between the drain terminal and the source terminal of the MOS FET 13.
- a high voltage is generated as a resonance voltage at both ends of the capacitor 33 of the above-described resonance circuit.
- the electrode fluorescent lamp 3 1 In the part, breakdown occurs and discharge starts.
- the electrode fluorescent lamp 31 starts discharging, the lamp current flowing through the electrode fluorescent lamp 3.1 is limited by the resonance inductor 14 to maintain a stable discharge.
- the configurations and operations of the dimming control unit 8 and the intermittent drive control unit 9 in the present embodiment are the same as those in the first embodiment. It is clear from the description of Embodiment 1 that the dimmable lighting of a general dimmable general electrode fluorescent lamp can be stably dimmed by setting the configuration of the discharge lamp lighting device as shown in FIG. And will not be described again.
- the discharge lamp lighting device according to the fourth embodiment is an electrodeless bulb-type fluorescent lamp, and FIG. 7 schematically shows the configuration thereof.
- the discharge lamp lighting device of the present embodiment is an electrodeless bulb-type fluorescent lamp, it may be configured as a bulb-type fluorescent lamp with electrodes.
- the electrodeless bulb-type fluorescent lamp shown in FIG. 7 includes a translucent discharge bulb 10 having a concave portion 10a and containing mercury and a rare gas (eg, argon) (not shown).
- the electrodeless fluorescent lamp 3, the base 56 such as E26 type for incandescent lamps, and the wiring of the lighting circuit (for example, the circuit shown in FIG. 5) are formed, and each circuit component is attached.
- a high-frequency voltage is supplied to the induction coil 11, and an AC electromagnetic field is generated in the discharge bulb 10.
- the energy supplied by the AC electromagnetic field generates a discharge plasma in the discharge valve 10, thereby exciting the mercury sealed in the discharge valve 10.
- the induction coil 11 includes a magnetic core 11 a and a winding 11 b, and is arranged in a recess 10 a of the discharge bulb 10.
- the electrodeless fluorescent lamp 3, the circuit board 54, and the base 56 are integrally assembled, and although not shown, are electrically connected to each other, and are incandescent through the base 56. Power is supplied by screwing it into the light bulb socket, and the electrodeless fluorescent lamp 3 is turned on.
- the AC voltage input through the base 56 is an AC voltage whose phase is controlled by an external phase control device (for example, a dimmer for an incandescent lamp).
- the lamp of the present embodiment is a bulb-type electrodeless fluorescent lamp in which an electrodeless fluorescent lamp 3, a lighting circuit, and a base are integrally assembled.
- the lamp of the present invention is not limited to this.
- a discharge lamp lighting device in which the fluorescent lamp 3 and the lighting circuit are separate from each other instead of the body may be used.
- the discharge lamp lighting device is similar to the configuration of the first embodiment, and the dimming control unit 8 and the intermittent drive control unit 9 are different from the first embodiment. The differences are described below.
- the difference of the present embodiment from the first embodiment is the circuit constants of the circuit elements used in the dimming control unit 8 and the intermittent drive control unit 9.
- the discharge lamp lighting device of the present embodiment The intermittent drive is performed by always keeping the amount of deviation between the phase-controlled voltage turn-on and the timing of lighting of the inverter unit 7 constant. In other words, the lighting is performed by the chamber overnight unit 7 with a predetermined time lag after the evening * on.
- the predetermined shift time is, for example, a time longer than several% of the cycle of the input AC voltage.
- Figure 1 In the waveforms from a to d, the horizontal axis is the time axis, which is a common measure in each figure. “A” in FIG. 10 shows the waveform of the voltage phase-controlled by the dimmer 2. From this figure, it can be seen that the conduction angle of the triac of the dimmer 2 is close to 7 °, and it is in a state where a considerably deep dimming is being performed.
- B in FIG. 10 shows a dimming signal sent from the dimming control unit 8 to the intermittent drive control unit 9 when a phase-controlled voltage like a in FIG. ing.
- the dimming signal from the dimming control unit 8 is delayed by the time ⁇ t (displacement amount) and the intermittent drive control unit is delayed. Sent to 9.
- the drain current of the first MOS FET 12 becomes as shown in c of FIG.
- the drain current of the second MOS FET 13 is not shown because it is almost the same as that shown by c in FIG.
- the electrodeless fluorescent lamp 3 When the drain current of MOSFETs 12 and 13 is flowing, the electrodeless fluorescent lamp The lamp 3 emits light, and the light emission output is as shown in d of FIG. Since the shift time At is constant, the emission output is always constant, and the electrodeless fluorescent lamp 3 does not flicker.
- the drain currents of the MOS FETs 12 and 13 require a large amount of energy to start the electrodeless fluorescent lamp 3, and a large current flows instantaneously as shown in c of FIG. Since the turn-on of the dimming command signal is delayed by ⁇ t time from the turn-on of the phase control voltage, the rise of the drain currents of the MOSFETs 12 and 13 is delayed, and the supply to the electrodeless fluorescent lamp 3 is correspondingly delayed. Not only does the supply time of the high-frequency power supplied decrease and the light emission time shortens, but when the phase control voltage is the highest immediately after the phase control voltage is turned on, the driving of the inverter unit 7 is stopped. Therefore, the emission output of the electrodeless fluorescent lamp 3 is reduced as compared with the case where the delay time At is substantially zero.
- the amount of deviation (time At) between the phase-controlled AC voltage on / off and the intermittent drive lighting timing of the inverter / night unit 7 is maintained constant.
- the flicker of the discharge lamp can be prevented.
- the timing shift uses the response time of the circuit element, but a delay time may be provided by using a delay circuit or the like. If the shift time At is slightly shorter than one cycle of the AC voltage, the intermittent drive lighting timing of the inverter 7 is earlier than the phase-controlled AC voltage ON. Although it is observed that the discharge lamp is shifted, the flicker of the discharge lamp is also prevented in this case.
- the shift amount is preferably small, and more preferably substantially zero.
- a mode in which the dimming control unit 8 and the intermittent drive control unit 9 of the present embodiment are applied to the discharge lamp lighting device of the second embodiment can be a modification of the present embodiment. Also in this case, flickering of the discharge lamp can be prevented in the same manner as described above.
- the discharge lamp lighting device has the same circuit configuration as the device of the first embodiment, but the circuit constants of the elements of the dimming control unit 8 are different from those of the first embodiment. Therefore, that point will be described. .
- the phase of the AC voltage input in the dimming control unit 8 is 30 And the resistance values of the two impedance elements R 3 and R 4 of the dimming control unit 8 so that the voltage applied to the Zener diode ZD 3 when the temperature reaches 150 ° is equal to the Zener voltage.
- the zener voltage of the diode ZD3 is set.
- a reverse current flows when a voltage equal to or higher than a predetermined reverse voltage is applied.
- the Zener diode ZD3 has a Zener diode ZD3.
- One diode ZD 3 does not conduct, and a light-off signal is output.
- the power supply ZD 3 is turned on simultaneously (in synchronization) with the first turn-on, and the dimming control unit 8 controls the dimming signal (which is a Hi-level square wave). ON signal) (Fig. 13b). Then, when the phase of the AC voltage becomes 150 degrees, the Zener diode ZD 3 becomes non-conductive, and the non-conductive state is maintained until the next turn-on, as shown in FIG. A low level dimming signal (OFF signal) is output.
- the dimming is performed when the phase control angle becomes larger than 150 degrees.
- the control unit 8 outputs only the FF signal. This will be described below.
- phase control angle exceeds 150 degrees
- the voltage of the phase-controlled AC voltage will be too small to light the electrodeless fluorescent lamp 3 normally. Therefore, when the phase control angle exceeds 150 degrees, the flicker of the lamp becomes severe and the lamp becomes uncomfortable, and when the phase control angle approaches 180 degrees, it does not turn on. That is, if the phase control angle exceeds 150 degrees, the lighting of the electrodeless fluorescent lamp 3 becomes unstable.
- the phase control angle when the phase control angle is greater than 150 degrees, only the OFF signal is output from the dimming control unit 8, so that the phase control angle is increased (the dimming is increased).
- the OFF signal is output before the lighting of the lamp becomes unstable. Configuration. Therefore, even if the dimming is deepened, the lamp does not flicker significantly.
- the phase control angle when the phase control angle is 150 degrees, the lamp may flicker in some cases, but the flicker is such that most people do not feel uncomfortable, and it can be said that it is acceptable flicker.
- the resistance values of the impedance elements R 3 and R 4 and the zener voltage of the zener diode ZD 3 are adjusted, and when the phase control angle becomes larger than 120 degrees, the dimming control unit 8 switches to 0. It is preferable to output only the FF signal because the human eyes do not feel flicker.
- the range of the phase control angle of a general light bulb dimmer is from about 30 degrees to about 180 degrees. When dimming is performed by connecting the discharge lamp lighting device of the present embodiment, From this maximum output (phase control angle of about 30 degrees) to phase control angle of 150 degrees, the duty ratio decreases linearly.
- a graph in which the horizontal axis represents the phase control angle and the vertical axis represents the duty ratio is a linear line having a negative slope.
- the light emission output of the lamp also decreases substantially linearly with the phase control angle, similarly to the duty ratio. Therefore, dimming is easily performed.
- a form in which the dimming control section 8 of the present embodiment is applied to the discharge lamp lighting device of the second embodiment can be a modified form of the present embodiment.
- the lamp can be turned off before the lighting becomes unstable, and the lamp output decreases almost linearly with respect to the phase control angle, so that dimming operation can be performed easily.
- the shape of the discharge lamp described in Embodiments 1 to 6 may be any shape such as a straight tube, a round tube, a U-shaped tube, and the like provided that it is used for general lighting.
- the discharge lamp lighting device of the present invention is not limited to a fluorescent lamp for general lighting, but may be, for example, a health line lamp having a working spectrum effective for generating an erythema effect (bimin D), or a plant plant.
- a lamp for cultivating a plant having an effective spectrum for photosynthesis and morphogenesis may be used.
- the discharge lamp to be turned on by the discharge lamp lighting device of the present invention may be a discharge lamp in which a fluorescent substance is not applied to a discharge bulb like a sterilization lamp.
- the dimming control unit 8 is configured to output a signal that substantially synchronizes the turning-on and the intermittent driving lighting of the inverting unit 7. The reason for this is that dimming operation can be performed better if the synchronization is substantially performed.
- the configuration shown in Fig. 9 is not intended to synchronize the evening-on and the intermittent-drive lighting of the inverter 7 even though the intermittent-drive lighting circuit 4 'is used. is there. What differs from the configuration of the first embodiment is the configuration and arrangement of a dimming control unit 8 ′ that sends a dimming signal to the invar unit 7.
- the dimming control section 8 ′ includes a rectifier circuit 19, a triangular wave generation circuit 20, and a comparator 21.
- the output from the dimmer 2 whose phase is controlled by the triac is rectified through a rectifier circuit 19, and the output voltage (120Hz) and the output of a triangular wave generation circuit 20 that generates a reference voltage having a reference frequency (120Hz).
- the voltage is compared with the voltage by the comparator 21.
- the comparator 21 outputs a dimming signal having a constant frequency and a rectangular wave shape.
- the dimming signal was sent to the room 7 via the intermittent drive control unit 9, and the ratio of the on-time to the off-time of the room 7 was changed to control the light of the electrodeless fluorescent lamp 3.
- An electrodeless fluorescent lamp 3 was used as the discharge lamp, the switching frequency f1 of the inverter circuit was 200 kHz, and MOSFETs 12 and 13 were used as the switching elements.
- Fig. 11 shows an example of the experimental results.
- FIG. 11 shows the waveform of the voltage phase-controlled by the dimmer 2. From this figure, it can be seen that the conduction angle of the triac of the dimmer 2 is close to T, and that the dimming is performed in a considerably deep state.
- FIG. 11 shows a dimming signal sent from the dimming control unit 8 'to the inverter unit 7 when the phase-controlled voltage as shown in a of FIG. 10 is input to the lighting circuit 4'. ing.
- the on / off of the phase control voltage is not synchronized with the rise of the ON signal of the dimming signal.
- the rising timing of the ON signal of the dimming signal is shifted from the turn-on timing of the phase control voltage, and the shift time varies depending on the time.
- this dimming signal fluctuates as shown in Fig. 11b, the drain current of MOSFET 12 (or 13) changes as shown in Fig. 11c, and as a result, the electrodeless fluorescent lamp 3 The supply of electrical energy is reduced, and the luminescence output changes as shown in Fig. 11d, causing flickering.
- the drain currents of the MOSOSFETs 12 and 13 decrease, and as a result, the high-frequency power supplied to the electrodeless fluorescent lamp 3 decreases, and whether the lamp is turned on or turned off Becomes a state close to the threshold state.
- the electrodeless fluorescent lamp 3 barely lights up.
- a discharge lamp lighting device that can supply electric energy to the electrodeless fluorescent lamp 3 as much as possible.
- this lighting device As shown in Fig. 11, when the timing of the rise of the ON signal of the dimming signal and the turn-on of the phase control voltage deviate from each other and the length of the deviation time fluctuates, this lighting device The electrodeless fluorescent lamp 3 attached to the lamp is almost turned off, as will be understood from the above description, and is turned on occasionally.
- the electrodeless fluorescent lamp 3 may not be able to light at all. Become.
- the discharge lamp lighting device of the present invention when the AC voltage whose phase is controlled by the dimmer is input to the electrodeless or electroded fluorescent lamp to dim the fluorescent lamp
- flickering occurs.
- a stable dimming operation can be realized without losing light.
- the discharge lamp lighting device of the present invention can realize a stable dimming operation without flickering or extinguishing, and is useful as a fluorescent lamp or the like connected to a dimmer.
Abstract
Description
Claims
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JP2003-158952 | 2003-06-04 | ||
JP2003158952 | 2003-06-04 |
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PCT/JP2004/007069 WO2004110110A1 (ja) | 2003-06-04 | 2004-05-18 | 放電ランプ点灯装置 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2175700A1 (en) * | 2008-10-09 | 2010-04-14 | Chuan Shih Industrial Co., Ldt. | Dimming circuit for discharging lamp capable of turning off under a low power condition |
US7888886B2 (en) | 2005-05-10 | 2011-02-15 | Koninklijke Philips Electronics N.V. | Universal line voltage dimming method and system |
CN113271699A (zh) * | 2015-06-08 | 2021-08-17 | 松下知识产权经营株式会社 | 调光装置 |
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