WO2006059583A1 - 放電灯点灯装置並びに照明器具 - Google Patents
放電灯点灯装置並びに照明器具 Download PDFInfo
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- WO2006059583A1 WO2006059583A1 PCT/JP2005/021832 JP2005021832W WO2006059583A1 WO 2006059583 A1 WO2006059583 A1 WO 2006059583A1 JP 2005021832 W JP2005021832 W JP 2005021832W WO 2006059583 A1 WO2006059583 A1 WO 2006059583A1
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- Prior art keywords
- frequency
- inverter
- voltage
- discharge lamp
- current
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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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
-
- 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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
-
- 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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
Definitions
- the present invention relates to a discharge lamp lighting device and a lighting fixture equipped with the discharge lamp lighting device.
- a discharge lamp lighting device for lighting a discharge lamp in particular, a thermal negative fluorescent lamp, has a leading preheating for preheating the filament. It is configured to create a lighting mode in which the discharge lamp is rated or dimmed through a start mode in which a high voltage is applied after pre-heating and starting the discharge lamp, and a timer is used during each mode. Is set.
- This discharge lamp lighting device resonates high voltage AC power output from the inverter, which converts DC power output from the chiyotsuba into DC power, boosts the DC power obtained by rectifying the AC power of AC power.
- a resonant circuit that is applied to the discharge lamp, and by changing the switching frequency of the switching elements that constitute the inverter, different voltages are supplied to the discharge lamp in each period of the preceding preheating mode, the start mode, and the lighting mode. It is configured to be applied to.
- This discharge lamp lighting device detects the output voltage from the chitsuba to the inverter, and resets the inverter to the preheat mode when the DC output voltage to the inverter drops due to an instantaneous power failure of the AC power supply. By providing this means, excessive stress is prevented from occurring in the circuit components of the discharge lamp and inverter.
- a ripple voltage is generated at the output of the chiba immediately after the start of the discharge lamp, and the output voltage from the chitoba to the inverter is temporarily reduced, so that the inverter is advanced.
- It may be designed to disable the reset means during the preheat mode or start mode and prohibit the transition to the preheat mode even if the output voltage to the inverter drops.
- the present invention has been achieved in view of the above-described problems. Even if the input voltage to the inverter immediately decreases immediately after starting, the circuit component is not reset.
- the present invention provides a discharge lamp lighting device capable of performing a stable lighting operation without giving a strong stress.
- a discharge lamp lighting device includes a rectifier that rectifies an AC voltage from an AC power source, a chopper, an inverter, a resonance circuit, and an inverter controller.
- the chipper is equipped with an inductor, a smoothing capacitor, and a switching element to convert the output voltage of the rectifier to a DC voltage.
- the inverter includes at least one switching element, and the switching element is turned on and off at a high frequency to convert the output of the chitsuba into AC power.
- the resonant circuit has at least one inductor and capacitor, and resonates the AC power output from the inverter and applies it to the discharge lamp.
- the inverter controller preheats the filament of the discharge lamp by selectively driving at least one switching element of the inverter at a different preheating frequency (fl), starting frequency (f2), and lighting frequency (f3).
- Preheating mode in which preheating voltage is output from the inverter, starting the discharge lamp A start mode for outputting the starting voltage for the inverter to the inverter and a lighting mode for outputting the lighting voltage for stably lighting the discharge lamp from the inverter are provided.
- the discharge lamp device includes a discharge lamp abnormality detection circuit that detects an abnormal state of the discharge lamp, a reset unit, an inverter stop unit, and a timer.
- the reset means detects the chiba output voltage supplied from the chitsuba to the inverter, and when the output voltage falls below the first threshold, operates the inverter controller in the start mode or the preheat mode.
- the inverter stop means operates the inverter controller to stop the inverter when a discharge lamp abnormality is detected by the discharge lamp abnormality detection circuit.
- the timer provides the inverter controller with a signal that determines the start of the preheating mode, start mode or lighting mode, and a reset signal prohibition signal that prohibits the operation of the reset means, and an inverter stop prohibition signal that prohibits the operation of the inverter stop means. Are generated respectively.
- the discharge lamp lighting device of the present invention is characterized in that the inverter controller has frequency sweep means for gradually changing the switching frequency to the starting frequency power lighting frequency, and the timer is the time power frequency at which the preheating frequency is selected. Only during the period until the switching frequency becomes the lighting frequency by the sweep means, the reset prohibition signal is generated to prohibit the operation of the reset means during this period, and switching by the frequency sweep means from the time when the preheating frequency is selected.
- the inverter stop prohibition signal is generated only during the period when the frequency starts to change to the starting frequency force lighting frequency, and the operation of the inverter stop means during this period is prohibited.
- the reset means is disabled, and even if the output voltage from the chitsuba to the inverter decreases instantaneously immediately after the start, the start mode is the preheat mode. It is possible to shift to the lighting mode without returning to, and it is possible to prevent excessive stress from acting on the circuit components.
- the inverter stop means is enabled before the end of the period during which the reset means is disabled, immediately after the discharge lamp is started, if an abnormality in the discharge lamp is detected, the inverter is immediately stopped and the inverter is stopped. The circuit can be protected.
- a frequency sweep means to provide a transition period in which the switching frequency is gradually changed from the starting frequency to the lighting frequency, fluctuations in the chopper output input to the inverter can be suppressed during this transition period.
- Start mode The power can also make a stable transition to the lighting mode.
- this discharge lamp device there may be provided feedback means for detecting a current flowing in the at least one switching element constituting the inverter and controlling the inverter controller so that the current becomes a predetermined value. desirable.
- the timer is only the period until the switching frequency starts to change from the starting frequency to the lighting frequency by the time power frequency sweeping means when the preheating frequency is selected, that is, the period before the transition period starts.
- the feedback means 400 is invalidated. Therefore, the feedback means can operate only after the discharge lamp is turned on and the current flowing through the discharge lamp is stabilized, and stable feedback control is performed.
- the discharge lamp lighting device is preferably provided with a preheating circuit for supplying a preheating current to the filament of the discharge lamp and a preheating controller for controlling the preheating circuit to adjust the preheating current.
- the preheat controller is configured to receive a timer force signal, control the preheat circuit to supply a preheat current from the preheat mode to the end of the start mode, and suppress the preheat current after the start mode ends. Appropriate preheating current can be applied to the discharge lamp.
- the discharge lamp abnormality determination circuit is configured to detect a physical quantity indicating the state of the discharge lamp, and the inverter stop means outputs a stop signal when the physical quantity exceeds a predetermined reference.
- the inverter controller receives the stop signal and stops the output of the inverter.
- the signal generation circuit has a first lamp threshold value that defines the above-mentioned standard and a second lamp threshold value that is larger than the first lamp threshold value.
- the signal generation circuit has a switching frequency from the starting frequency to the lighting frequency. During the transition period (t3 to t4), the second ramp threshold is selected, otherwise the first ramp threshold is selected.
- the reset means is disabled and the lighting is maintained, but the lamp output voltage increases as a result of the decrease in the inverter output current.
- the first ramp threshold may be exceeded momentarily.
- the second lamp threshold value higher than the first lamp threshold value is used to determine the discharge lamp abnormality, so the discharge lamp abnormality is erroneously determined and the inverter is stopped. It is prevented from letting it go.
- the inverter stop means detects abnormality of the discharge lamp based on the peak value of the voltage across the discharge lamp and the direct current component included in the voltage across the voltage.
- the discharge lamp abnormality detection circuit is configured to include a peak detection circuit that detects a peak value of the voltage across the discharge lamp and a DC component detection circuit that detects a DC component included in the voltage across the discharge lamp.
- the inverter stop means outputs a first stop signal when the peak value of the inverter exceeds a predetermined threshold, and outputs a second stop signal when the DC component exceeds the predetermined threshold.
- a second signal generator circuit that outputs a stop signal that reduces the output of the inverter to the inverter controller when receiving either the first stop signal or the second stop signal.
- At least one of the second signal generation circuit has a first threshold value and a second threshold value larger than the first threshold value, and the switching frequency is a transition period from the starting frequency to the lighting frequency (t3 to For t4), select the second threshold, otherwise select the first threshold.
- the inverter controller, the resetting means, and the inverter stopping means are constituted by one integrated circuit.
- the inverter controller includes a frequency setting unit that sets the switching frequency to a frequency corresponding to each mode in accordance with an output signal from the timer, and the frequency sweep means is externally attached to the integrated circuit. The frequency set by the frequency setting unit is swept according to the change in the voltage across the capacitor accompanying charging / discharging of the capacitor.
- the timer includes a circuit for charging and discharging a capacitor externally attached to the integrated circuit, and determines the end point of the preheating mode and the end point of the start mode based on the charging voltage, and a frequency setting unit in the frequency sweep means If the start point of the lighting mode is determined by sweeping the frequency according to the change in the voltage across this capacitor, one capacitor can be shared by the timer and the frequency sweep means, and is externally attached to the integrated circuit. The number of parts can be reduced.
- the frequency sweep means includes a sweep signal generation circuit that outputs a DC voltage that rises or falls immediately after the start mode ends according to the output signal of the timer. It is also preferable that the frequency setting unit is configured to change the switching frequency in accordance with the change in DC voltage.
- the sweep signal generation circuit outputs a first trigger signal for prohibiting and permitting the operation of the reset means, and outputs a second trigger signal for prohibiting and permitting the operation of the inverter stop means. Configured.
- the inverter controller be configured to change the high-frequency power output from the inverter in accordance with a dimming ratio command given from the outside in the lighting mode.
- the sweep means is configured to change the sweep period based on the dimming ratio.
- the frequency sweep means used in the inverter controller is configured to output a sweep voltage that gradually changes during a transition period from the end of the start mode to the start of the lighting mode.
- the inverter controller includes a first current generation circuit for supplying a first output current proportional to the sweep voltage, a second current generation circuit for supplying a constant second output current, and first and second output currents.
- a drive signal generation circuit that has a capacitor that is charged and discharged based on the charge current and determines the switching frequency based on the charge and discharge speed of the capacitor, and the first current generation circuit and the second current generation circuit simultaneously or And a switch circuit that is selectively operated.
- This switch circuit is controlled by a timer, and in the preheating mode, the first current generating circuit and the second current generating circuit are operated, and the above preheating is performed based on the total value of the first current and the second current.
- the starting mode only the first current generating circuit is operated to determine the starting frequency based on the first current
- the transition mode only the first current generating circuit is operated.
- the switching frequency is gradually changed up to the lighting frequency according to the sweep voltage, and in the lighting mode, only the second current generating circuit is operated to determine the lighting frequency based on the second current. To do.
- the first and second current generation circuits that are independent from each other are used, and the preheating frequency, the starting frequency, and the lighting are determined based on the total values of the first and second currents and the first and second currents. Since the frequency is determined, the frequency can be set with higher accuracy than when the frequency is determined based on a change in the current of a single current generation circuit force.
- the output voltage to the rectifier cover and the chiyotsuba is detected, and this output voltage is detected.
- a pulsating voltage detection circuit is provided that outputs a signal for stopping the inverter to the inverter controller when the voltage drops.
- the pulsating voltage detection circuit includes a comparator that compares the pulsating DC voltage output from the rectifier to the above-mentioned chitoba with a predetermined voltage, a capacitor that is charged and discharged based on the output of the comparator, It consists of a constant current circuit for charging and discharging the capacitor with a constant current, and a comparison / determination unit that compares the voltage across the capacitor with a predetermined reference value.
- the constant current circuit charges the capacitor with a constant current from the constant current circuit when it receives the output indicating the result of the pulsating DC voltage exceeding the specified voltage, and otherwise the capacitor power is constant current.
- the circuit is configured to discharge a constant current.
- the comparator / determinator When the voltage across the capacitor exceeds the reference value, the comparator / determinator outputs a permission signal that permits the inverter operation to the inverter controller, and otherwise outputs a non-permission signal that stops the inverter operation. Output to the inverter controller.
- This pulsating voltage detection circuit can be realized with a relatively simple circuit configuration, and a discharge lamp lighting device suitable for integration into an integrated circuit can be obtained.
- FIG. 1 is a block circuit diagram showing a discharge lamp lighting device according to a first embodiment of the present invention.
- FIG. 2 is a waveform diagram for explaining the operation of the above discharge lamp lighting device.
- FIG. 3 is a circuit diagram of an inverter controller used in the discharge lamp lighting device.
- FIG. 5 is a circuit diagram showing a frequency sweep circuit used in the above discharge lamp lighting device.
- FIG. 6 is a circuit diagram showing a first modification of the first embodiment.
- FIG. 7 is a circuit diagram showing a second modification of the first embodiment.
- FIG. 9 is a waveform diagram illustrating the operation of the timer described above.
- FIG. 10 is a block circuit diagram showing a third modification of the first embodiment.
- FIG. 11 is a waveform diagram for explaining the operation of the modified mode of FIG.
- FIG. 12 is a block circuit diagram showing a discharge lamp lighting device according to a second embodiment of the present invention.
- FIG. 13 is a waveform diagram for explaining the operation of the above discharge lamp lighting device.
- FIG. 1 to 5 show a discharge lamp lighting device according to a first embodiment of the present invention.
- This discharge lamp lighting device is built in the appliance to which the discharge lamp is mounted.
- the rectifier 10 rectifies the AC voltage from the AC power supply, and the chopping DC voltage is generated by receiving the pulsating DC voltage of the rectifier 10 20
- the inverter 30 converts this step-up DC voltage into a high-frequency AC voltage, and the resonance circuit 40 resonates the high-frequency AC voltage.
- the discharge lamp lighting device further includes a preheating circuit 50 and supplies a preheating current to the filament of the discharge lamp 70.
- the chopper 20 includes a switching element. By turning on and off the switching element based on a control signal from the chopper controller 700, a smooth DC voltage obtained by boosting the pulsating DC voltage output from the rectifier 10 is obtained.
- the inverter 30 includes switching elements 31 and 32 connected in series between the output terminals of the capacitors, and the switching elements 31 and 32 are alternately turned on and off by a control signal from the inverter controller 100 so that a resonance circuit is provided.
- Supply high frequency voltage to The resonance circuit 40 includes an inductor 41 and a capacitor 42 connected in series between both ends of one switching element 32, and turns on the switching elements 31 and 32 at different switching frequencies near the resonance frequency of the resonance circuit.
- a preheating mode for supplying a preheating current to the discharge lamp 70, a start mode for igniting the discharge lamp 70, and a lighting mode for stably lighting the discharge lamp after the start are created.
- starting frequency f 2
- the preheating frequency (fl) is set slightly higher than the starting frequency f2.
- a lighting frequency (f 3) deviated from the starting frequency is set to give a lighting voltage for maintaining lighting, and the relationship between these frequencies is set as fl> f2> f3. Yes.
- the inverter controller 100 generates a frequency signal that determines a preheating frequency (fl), a starting frequency (f 2), and a lighting frequency (f 3), and supplies this frequency signal to the driver 38.
- the driver turns on and off the switching elements 31 and 32 alternately at the switching frequency determined by the frequency signal.
- the inverter controller 100 is formed with a sweep circuit 110 that gradually changes the switching frequency toward the starting frequency (f2) force lighting frequency (f3), and is determined by the output from the timer 80 as shown in FIG.
- a preheating voltage, a starting voltage, a sweep voltage, and a lighting voltage are applied to the discharge lamp 70 via the resonance circuit 40.
- the preheating controller 58 turns on the switching element 51 of the preheating circuit 50 on the basis of the signal from the timer 80, and the inverter 30 A preheating current is generated from the output voltage via the transformer 52, and this is passed through the filament 72. In other periods, the switching element 51 is turned off.
- the discharge lamp lighting device is provided with feedback means 400 for making the lamp current flowing in the discharge lamp 70 constant after the discharge lamp is lit.
- the feedback means 400 is configured to adjust the switching frequency of the inverter 30 so that the current flowing through the switching element 32 of the inverter 30 becomes a predetermined value in proportion to the lamp current, and this current is compared with the predetermined value.
- the output of the comparator 401 is supplied to the inverter controller 100, and the inverter controller 100 adjusts the switching frequency according to this output.
- the reset means 200 for returning the inverter 30 to the preheating mode when the output voltage Vc from the chopper 20 to the inverter 30 falls below a predetermined threshold, and the discharge lamp are at the end of life.
- An inverter stop means 300 is provided for stopping the inverter 30 when this is detected.
- the reset means 200 is configured to output a reset signal Rst to the timer 80 when the output of the chopper 20 falls below a predetermined threshold value.
- the timer 80 receives the reset signal Rst and sets the inverter 30 in the start mode. Outputs the signal for operation to the inverter controller 100.
- the inverter may be returned to the preheating mode.
- Inverter stopping means 300 has a discharge lamp at the end of its life from discharge lamp abnormality detection circuit 500.
- the discharge lamp abnormality detection circuit 500 includes a peak detection circuit 510 that detects a voltage across the discharge lamp 70, that is, a peak value VLp of the lamp voltage, and a DC component detection circuit 520 that detects a DC component VLd included in the lamp voltage. Composed.
- the inverter stopping means 300 includes a first signal generating circuit 310 that outputs a stop signal when the peak value of the lamp voltage exceeds a predetermined lamp threshold, and a first signal that outputs a stop signal when the DC component exceeds a predetermined lamp threshold.
- Two-signal generation circuit 320 is provided, and these circuits 310 and 320 are connected to the inverter controller 100 via the OR gate 330, and when a stop signal is output from any circuit, the inverter controller 100 stops the inverter 30.
- Stopping the inverter in this case means stopping the lighting of the discharge lamp, and includes the case where the output of the inverter is not completely zero.
- a constant lamp threshold VLT is used as the ramp threshold compared with the peak value
- the first lamp threshold VLT1 is used as the ramp threshold compared with the DC component.
- a second ramp threshold VLT2 is used (VLT1 ⁇ V LT2).
- the second ramp threshold VLT2 is used only during the transition period (t3 to t4), and the first ramp threshold LVT1 is used otherwise.
- the reset means is disabled and the lighting is maintained, but the output current of the inverter 30 As a result of the decrease, the lamp voltage may rise and momentarily exceed the first lamp threshold VLT1.
- the second signal generation circuit 320 uses the second lamp threshold value VLT2 that is higher than the first lamp threshold value. It is possible to prevent the inverter from being stopped by determining an abnormality.
- these two different lamp threshold values can also be applied to the first signal generation circuit 310, and during the transition period (t3 to t4), the DC component of the lamp voltage is reduced due to the instantaneous drop in the chitsuba output. Even if the voltage rises momentarily, the inverter 30 can be prevented from stopping accidentally. Accordingly, by providing such two ramp threshold values in at least one of the first and second signal generation circuits 310 and 320, stable operation is ensured.
- the reset means 200 determines whether the preheating period shown in FIG. The operation is prohibited for the transition period (tl to t4), and the inverter stop means 300 and the feedback means 400 are set for the start period (tl to t3) from the preheating period by the prohibition signal Sd from the timer 80. Therefore, the operation is prohibited. In other words, the reset means 200 is permitted to operate at the end of the transition period (t3 to t4), and the inverter stop means 300 and the feedback means 400 are permitted to operate from the transition period (t3 to t4). Therefore, as shown in FIG. 2, after the discharge lamp is lit during the start-up period, the inverter 30 is immediately stopped when the end of life is detected in the transition period (t3 to t4).
- the feedback means 400 is configured so that the feedback operation is prohibited during the period from the preheating period to the starting period (tl to t3) when the switch 402 is turned on and off based on the signal from the timer 80, and otherwise permitted. Is done.
- the inverter controller 100 includes a sweep circuit 110 that generates a continuously decreasing DC voltage, and a first current generation circuit 101 that uses the output DC voltage VI from the sweep circuit 110 as a current source.
- the second current generation circuit 102 using the constant voltage V2 as a current source, the switch circuit 140, and the drive signal generation circuit 150 are configured.
- Timer 80 outputs signals Vtl, Vt2, and Vt3 indicating the preheating period start time (tl), start period start time (t2), and lighting period start time (t3), based on the internal clock signal. Based on this signal, the switch circuit 140 and the sweep circuit 110 are controlled to generate the frequency signal.
- the drive signal generation circuit 150 includes a current switch 151, 152, 153 coupled to the reference power supply 108, a capacitor 162, a charging switch 154 for charging the capacitor 162 by the current flowing through the current mirror 152, and a reference voltage Vref.
- Switching A circuit 155 and a comparator 158 that compares the voltage of the capacitor 162 with a reference voltage are included.
- One FET constituting the current mirror 153 is provided in the discharge path from the capacitor 162, and the pulse voltage output from the comparator 158 generates the above frequency signal as the capacitor 162 is charged / discharged. It is sent to the driver 38, and the switching frequency of the inverter, that is, the preheating frequency (fl), the starting frequency (f 2), and the lighting frequency (f 3) are determined.
- the first current generation circuit 101, the second current generation circuit 102, the switch circuit 140, the drive signal generation circuit, and the sweep circuit 110 that constitute the inverter controller 100 are integrated with the integrated circuit as one chip together with the timer 80.
- the capacitor 162 and the resistors 121, 122, and 123 are externally attached to the integrated circuit.
- the magnitude of the charging current Ic for charging the capacitor 162 via the current mirror 152 and the magnitude of the discharge current Id associated therewith are, as will be described below, the first current generation circuit 101 to the second current. It is determined by the current flowing from the generation circuit 102.
- the first current generation circuit 101 includes an operational amplifier 103 and a transistor 105 for flowing a current corresponding to the DC voltage VI output from the sweep circuit 110, and is connected in series with external resistors 121 and 123. A first current path for the first current flowing through the internal resistor 131 is formed.
- the second current generation circuit 102 includes an operational amplifier 104 and a transistor 106 for flowing a constant current according to a constant voltage V2, and a second current flowing through an external resistor 122 and an internal resistor 132 connected in series to the resistor 122. The two current paths are formed.
- the switch circuit 140 includes switching elements 141, 142, and 143, and is on / off controlled by a timer 80.
- the first switching element 141 is connected between the base-emitters of the transistor 105, and allows the first current to flow in the first current path only when turned off by the signal Vtl from the timer 80.
- the second switching element 1 42 is connected between the base emitters of the transistor 106 and allows the second current to flow into the second current path only when turned off by the signal Vt2 from the timer 80.
- the third switching element 143 is inserted into the shunt path that also shunts the first current path force.
- the current value that defines the preheating frequency (fl) is set to the sum of the first current flowing through the shunt path of the first current path and the second current flowing through the second current path, and the starting frequency ( The current value that defines f 2) is set as the sum of the first current value and the second current flowing through the first current path, and the current value that defines the lighting frequency (f 3) is based only on the second current. It is set!
- both the first and second switching elements 141 and 142 of the switch circuit 140 are turned off by the output signals Vtl and Vt2 from the timer 80.
- the third switching element 143 is turned on by the output signal Vt3
- the first current Ila from the first current generation circuit 101 flows through the resistors 131, 121, 133, the third switching element 143, and the second current
- the second current 12 from the generator circuit 102 flows through the resistors 132 and 122.As a result, the combined current (Ila + I2) flows through the current mirror, and the capacitor 162 is charged and discharged in a fast cycle, resulting in a high frequency.
- a frequency signal specifying the preheating frequency (fl) is output from the comparator 158.
- the first current lib As a result of the current value generated in the first current generation path 101 gradually decreasing in response to the output from the sweep circuit 110, the first current lib also gradually decreases, and the current for charging and discharging the capacitor 162 gradually increases.
- the frequency signal that decreases and gradually decreases the switching frequency from f2 to f3 is output from the comparator 158.
- the first and third switching elements 141 and 14 3 are turned off, and only the second switching element 142 is turned on, and the second current generating circuit 1 Only the second current 12 from 02 flows through the resistors 132 and 122, and this current charges and discharges the capacitor 162.
- a frequency signal specifying the lighting frequency (f3) is output from the comparator 158.
- the preheating frequency (fl) is determined based on one of the first current and the second current individually flowing from each circuit and the combined current thereof. Since the starting frequency (f2) and lighting frequency (f3) are determined, these frequencies can be clearly distinguished and set accurately by a simple combination of resistors used. Further, the continuous change of the frequency during the transition period (t3 to t4) can be easily set based on the input DC voltage to the first current generation circuit 101.
- a series circuit of the external resistor 121 and the internal resistor 133 forms a shunt path connected in parallel with the external resistor 123.
- Switching between the preheating frequency (fl) and the starting frequency (f 2) is performed by selectively flowing a first current through this shunt path and a path parallel thereto, and a small number of external resistances are applied. It is possible to set the optimum frequency by using it.
- the second current path resistor 122 is connected between the integrated circuit T2 and ground.
- the sweep circuit 110 includes three constant current sources 111, 112, 113, two transistors 114, 115, a mirror circuit 116, a comparator 117, a switching element 118, a transfer gate 119, A voltage dividing resistor circuit 128 is provided.
- the voltage dividing resistor circuit 128 divides the voltage from the reference power supply to give different threshold voltages Vthl and Vth2 (Vth2 and Vthl), one threshold voltage Vth 1 force 3 ⁇ 4 input to the base of the np-type transistor 114, and the other
- the threshold voltage Vt h2 is input to the non-inverting input terminal of the comparator 117.
- the base of the npn-type transistor 115 and the constant current source 111 are connected to the emitter of the transistor 114 through a resistor, and the emitter voltage of the transistor 115 and the threshold voltage Vt hi applied to the base of the transistor 114 are abbreviated. Are equal.
- An external capacitor 180 is connected to the emitter of the transistor 115 via the terminal T4, and the inverting input terminal of the comparator 117 and the mirror circuit 116 are connected. Therefore, the capacitor 180 has a voltage substantially equal to the threshold voltage Vthl. Charged. Comparator 117 compares the voltage across capacitor 180 with threshold voltage Vth2. When the voltage across the capacitor 180 is higher than the threshold voltage Vth2, an L level signal is output to the transfer gate circuit 119 otherwise.
- the switching element 118 is connected between the base of the transistor 115 and the ground, and is turned on / off by the output signal Vt4 from the timer 80. When the switching element 118 is off, the capacitor 180 is charged via the transistor 115. When the switching element 118 is on, the voltage across the capacitor 180 becomes almost 0 [V].
- the switching element 118 is turned off only during the period from the preheating period to the starting period (tl to t3) by the output signal Vt4 from the timer 80, and the capacitor 180 is charged during this period.
- the voltage across the capacitor 180 becomes higher than the threshold voltage Vth2, and the output of the comparator 117 becomes L level, so that a constant voltage substantially equal to the voltage across the capacitor 180 is transferred from the transfer gate circuit 119 to the lighting frequency setting circuit 42. Is output.
- FIG. 6 shows a first modification of the first embodiment described above, and the connection relationship between the external resistors 121, 122, and 123 and the third switching element 143 in the inverter controller 100. Otherwise, the configuration and function are the same as those of the first embodiment. For this reason, the same code
- the connection point between the terminal T2 of the integrated circuit and the external resistor 122 connected thereto is connected to the terminal T3 via the external resistor 123, so that the third switching element 143 and the external resistor are connected.
- 123 and the internal resistor 133 are connected in parallel with the external resistor 122, and the second current Form a diversion path that diverts from the path!
- the first and second switching elements 141 and 142 are turned off and the third switching element 143 is turned on. While the current II flows through the resistors 131 and 121, the second current I2a from the second current generation circuit 102 flows through the shunt path (resistor 123, third switching element 143), and the sum of these currents (II + I2a) is passed through the current mirror 152 and the capacitor 162 is charged and discharged based on this current to determine the preheating frequency.
- the first and second switching elements 141 and 142 are turned off, and the third switching element 143 is also turned off. While the current II flows through the resistors 131 and 121, the second current I2b from the second current generation circuit 102 flows through the external resistor 122, and the sum of these currents (II + I2b) flows through the current mirror 152, The starting frequency is determined by charging and discharging the capacitor 162 based on this current.
- the first and third switching elements 141 and 143 are turned off, and only the second switching element 142 is turned on. Only one current II flows through the resistors 131 and 121, and this current flows through the current mirror 152 to charge and discharge the capacitor 162, thereby determining the lighting frequency.
- FIG. 7 shows a second modification of the first embodiment described above, and is different from that of the first embodiment except that the capacitor 180 used in the sweep circuit 110 is shared by the timer 80.
- the configuration and function are the same. For this reason, the same code
- the timer 80 determines the start time (t2) and the end time (t3) of the start period using the charging / discharging of the capacitor 180! /.
- the timer 80 in this modified mode includes a constant current circuit 810 for supplying a constant current from the reference power source 801, and a current mirror 811, 812, 813 for charging and discharging the capacitor 180 with a constant current.
- Switching element 820 for switching charge / discharge, a pair of comparators 831 and 832 for comparing the voltage across capacitor 180 with a reference value, starting point of start period (t2), equipped with flip-flops 851 and 852 that output a signal for determining the end point (t3)
- the voltage across the capacitor 180 is input to the inverting input terminals of the comparators 831 and 832, the first reference value switching circuit 841 is connected to the non-inverting input terminal of the first comparator 831, and the second The second reference value switching circuit 842 is connected to the non-inverting input terminal of the comparator 832.
- the first reference value switching circuit 841 switches between the reference value TH1 and the reference value THO according to the output of the first comparator 831, and the second reference value switching circuit 842 corresponds to the output of the second comparator 832.
- the relationship between each reference value is set as TH1> TH2> TH0.
- the output of the first comparator 831 is inverted by the NOT gate 833 and input to the set terminal S of the first flip-flop 851.
- the output of the second comparator 832 is input to one of the AND gates 834, and the output of the first flip-flop 851 is input to the other of the AND gates 834.
- the output of the AND gate 834 is input to the set terminal S of the second flip-flop 852.
- the output of the first comparator 831 becomes L level, the switching element 820 is turned off, and as a result, the charging of the capacitor 180 is completed, and the capacitor is passed through the current mirror 813. 180 begins to discharge.
- the L level output from the first comparator 831 causes the H level signal to be input to the set terminal S of the first flip-flop 851, and the H level signal is output from the first flip-flop 851.
- This signal is sent to the inverter controller 100 as determining the start of the starting period (t2).
- the first and second reference value switching circuits 841 and 842 switch the reference value from TH1 to TH0 and from TH1 to TH2, respectively.
- the output terminal of the first comparator 831 is connected to the ground.
- the connected switch 835 is turned on by the H level output from the first flip-flop 851
- the output of the first comparator 831 is forcibly set to the L level, and the switching element 820 after this point is turned off. The charging of capacitor 180 is prohibited.
- FIG. 10 shows a third modification of the above-described first embodiment.
- a similar output DC is obtained by using a sweep signal generation circuit 190 instead of the sweep circuit 110 using the capacitor 180.
- the configuration and functions other than the output of the voltage VI to the frequency setting unit 120 (see Fig. 3) in the inverter controller 100 and the dimming ratio input means 194 are used for dimming the discharge lamp. This is the same as the first embodiment. For this reason, the same reference numerals are assigned to the same members, and duplicate descriptions are omitted.
- the sweep signal generation circuit 190 is configured to output a DC voltage VI that gradually decreases at the end of the starting period (t3) as shown in FIG.
- the DC voltage VI maintains this reference value after reaching the reference value Vd determined by the reference voltage generating circuit 192.
- This reference value Vd changes according to the dimming ratio of the discharge lamp specified by the dimming ratio input means 194. For this reason, as shown in FIG. 11, the starting point of the lighting period changes from t4 force to t4 ′ according to the dimming ratio.
- This reference value Vd is used as a reference voltage for the comparator 401 of the feedback means 400.
- the lamp current is adjusted to perform dimming.
- the sweep signal generator circuit 190 is based on the timer 80 clock signal.
- the trigger signal Se that permits these operations is output to the inverter stop means 300 and the feedback means 400, and the end of the transition period (t4)
- the trigger signal Re that permits the operation is output to the reset means 200.
- the inverter stop means 300, the feedback stop means 400, and the reset means 200 are disabled before receiving this permission signal.
- FIG. 12 shows a discharge lamp lighting device according to the second embodiment of the present invention.
- This discharge lamp lighting device is basically the same in configuration and function as the first embodiment, but when the pulsating DC voltage Vp from the rectifier 10 to the chopper 20 becomes a predetermined value or less, the inverter 30 And a pulsating voltage detection circuit 600 for stopping the chopper 20 is added.
- the same members are denoted by the same reference numerals, and redundant description is omitted.
- the rectifier 10 outputs a pulsating DC voltage to the chopper 20 via the filter capacitor 11.
- the chopper 20 includes a switching element 24 connected in series with an inductor 21 between output terminals of the rectifier 10, and a smoothing capacitor 26 connected in series with a diode 25 between both ends of the switching element 24.
- the switching element 24 is ON / OFF controlled by the chopper controller 700, accumulates the smoothed DC voltage in the smoothing capacitor 26, and this smoothed DC voltage is output to the inverter 30.
- the pulsating DC voltage from the rectifier 10 is input as a voltage Vp to the pulsating voltage detection circuit 600 via the resistors 12 and 13 and the capacitor 14, and is compared with a predetermined threshold value. When the level falls below this threshold, the pulsating voltage detection circuit 600 outputs a stop signal to the inverter controller 100 and the chopper controller 700 to stop the inverter 30 and the chopper 20.
- the pulsating voltage detection circuit 600 includes a comparator 610 that compares the voltage Vp with the first threshold Vxl, a constant current circuit 630 that charges and discharges the capacitor 620 with a constant current according to the output of the comparator 610, and a capacitor 620 A comparator 640 that compares the voltage across the terminal with the second threshold Vx2.
- the output of the comparator 610 is inverted by the NOT gate voltage 631, and when the voltage Vp exceeds the first threshold value Vxl, the capacitor 620 is charged with a constant current discharged from the constant current circuit 30, and the voltage Vp Is below a first threshold Vxl, the capacitor 620 is released at a constant current drawn into the constant current circuit 630. Electricity. As shown in FIG.
- the first threshold value Vxl changes to two levels according to the output of the comparator 610 to give hysteresis characteristics, and the switching circuit force composed of a resistor and a switch also has the first threshold value.
- Vx is input to the non-inverting input of comparator 610.
- the charging current of the capacitor 620 is set to be larger than the discharging current.Thus, the voltage V620 across the capacitor 620 is repeatedly charged and discharged based on the pulsating DC voltage.
- the comparator 640 H level signal is output to the inverter controller 100, and the operation of the inverter 30 is permitted.
- This H level signal is inverted by NOT gate 660 and the L level signal is output to reset terminal R of flip-flop 710 of chopper controller 700, and chopper controller 700 continues operation of chopper 20.
- the chopper controller 700 outputs a signal for driving on / off of the comparator 28, a comparator 720 for determining the presence or absence of current flowing through the switching element 21, a one-shot trigger 730, and A comparator 740 that determines the on-time of the switching element 24 of the chipper 20 is provided.
- the one-shot trigger 730 When no current flows through the inductor 21, that is, when the switching element 24 is OFF, the one-shot trigger 730 outputs an H level signal to the set terminal S of the flip-flop 730 by the output from the comparator 720. Switching element 24 is turned on. Accordingly, a current flows through the switching element 24.
- the comparator 740 receives a voltage corresponding to the current flowing through the switching element 24 at the non-inverting input terminal, and compares this voltage with a threshold value input to the inverting input terminal.
- the on-time of the switching element 24 Is determined by this threshold.
- This threshold value is defined by the output from the multiplier 750 and is created based on the pulsating DC voltage output from the rectifier 10 and the output voltage of the chitoba 20. That is, the voltage Vp input to the pulsating voltage detection circuit 600 and the voltage from the error amplifier 760 indicating the output voltage of the chopper 20 are input to the multiplier 750, and the current flowing through the switching element 24 is output from the multiplier 750.
- an H level signal is input to the reset terminal R of the flip-flop 710 and the switching element 24 is turned off.
- a constant DC output Vc is output from the chopper 20 at a high power factor.
- the pulsating voltage detection circuit 600 includes a comparator 650 that compares the voltage V620 across the capacitor 620 with a third threshold Vx3, a latch 652 that holds the output of the comparator 650, and the output of the latch 652 An AND gate 65 4 to which the output of the comparator 640 is input is added.
- the third threshold Vx3 is set to a value higher than the voltage Vp corresponding to the normal pulsating DC voltage. Normally, the output of the latch 652 is at the H level, so the output from the comparator 640 is ANDed as it is.
- the operation of the inverter 30 and the chopper 20 output from the gate 654 is permitted and stopped based on the comparison between the second threshold value Vx2 and the capacitor 620.
- a peak detection circuit 510 and a DC component detection circuit 520 that detect the end of life of the discharge lamp are provided, and each circuit has a lamp voltage of the discharge lamp.
- the capacitor 620 of the pulsating voltage detection circuit 620 is charged by the peak value and the DC component. For this reason, when an end-of-life discharge lamp is connected, at least one of the peak value and the DC component becomes high, and the charging voltage of the capacitor 620 exceeds the third threshold value Vx3.
- the comparator 650 outputs an L level signal and the AND gate 654 force also outputs an L level signal, a signal to stop the inverter 30 is sent to the inverter controller 100 and is sent to the chopper controller 700. Sends a signal to stop the operation of the chopper 20 and stops the inverter 30 and the chopper 20 Thus, it is possible to prevent an excessive stress from acting on the components constituting each circuit.
- a no-load determination circuit 530 is further provided, and when the discharge lamp is not connected, the inverter 30 and the chopper 20 are stopped.
- the no-load determination circuit 530 is connected when the switch 531 that is turned on when the voltage across the series circuit of the switching elements 31 and 32 in the inverter 30 exceeds a predetermined value is connected in parallel with the capacitor 620 and no load is detected.
- Capacitor 620 discharges through switch 531.
- the voltage V620 across the capacitor 620 falls below the second threshold value Vx2, and in the same way as when the pulsating DC voltage drops, an L level signal is output from the comparator 640, and the inverter 30 and the chopper 20 To prevent excessive stress on the circuit components.
- the pulsating voltage detection circuit 600, the end-of-life detection circuits 510, 520, and the no-load determination circuit 530 share the capacitor 620, and thus achieve multiple functions. However, the number of parts is reduced.
- the pulsating voltage detection circuit 600 excluding the capacitor 620 is formed as an integrated circuit together with the inverter controller 100, the chopper controller 700, and the drivers 28 and 38.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005800416764A CN101073293B (zh) | 2004-12-03 | 2005-11-29 | 放电灯镇流器以及照明器件 |
| EP05811196A EP1819205B1 (en) | 2004-12-03 | 2005-11-29 | Electric discharge lamp operation device and illumination instrument |
| US11/792,073 US7436123B2 (en) | 2004-12-03 | 2005-11-29 | Discharge lamp ballast device and lighting appliance |
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004351528 | 2004-12-03 | ||
| JP2004-351528 | 2004-12-03 | ||
| JP2004361615 | 2004-12-14 | ||
| JP2004-361992 | 2004-12-14 | ||
| JP2004361992A JP4534744B2 (ja) | 2004-12-14 | 2004-12-14 | 放電灯点灯装置及び照明器具 |
| JP2004-361615 | 2004-12-14 | ||
| JP2005-187262 | 2005-06-27 | ||
| JP2005187262A JP4506585B2 (ja) | 2004-12-03 | 2005-06-27 | 放電灯点灯装置及び照明器具 |
| JP2005-256837 | 2005-09-05 | ||
| JP2005256837A JP4453634B2 (ja) | 2004-12-14 | 2005-09-05 | 放電灯点灯装置並びに照明器具 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006059583A1 true WO2006059583A1 (ja) | 2006-06-08 |
Family
ID=36565017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/021832 Ceased WO2006059583A1 (ja) | 2004-12-03 | 2005-11-29 | 放電灯点灯装置並びに照明器具 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7436123B2 (ja) |
| EP (1) | EP1819205B1 (ja) |
| CN (1) | CN101073293B (ja) |
| WO (1) | WO2006059583A1 (ja) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4665480B2 (ja) * | 2004-10-26 | 2011-04-06 | パナソニック電工株式会社 | 放電灯点灯装置、照明器具、および照明システム |
| JP4807454B2 (ja) * | 2007-06-20 | 2011-11-02 | パナソニック電工株式会社 | 放電灯点灯装置、照明装置、及び液晶表示装置 |
| JP2009032471A (ja) * | 2007-07-26 | 2009-02-12 | Panasonic Electric Works Co Ltd | 放電灯点灯装置及び照明器具 |
| US8067926B2 (en) * | 2007-12-21 | 2011-11-29 | Lutron Electronics Co., Inc. | Power supply for a load control device |
| US8648544B2 (en) * | 2008-06-20 | 2014-02-11 | Panasonic Corporation | Illumination lighting apparatus, illumination apparatus, and illumination system |
| JP2010050049A (ja) * | 2008-08-25 | 2010-03-04 | Panasonic Electric Works Co Ltd | 放電灯点灯装置及び照明器具 |
| CN101730356B (zh) * | 2008-10-28 | 2012-12-19 | 松下电器产业株式会社 | 放电灯点灯装置及照明设备 |
| JP2010108650A (ja) * | 2008-10-28 | 2010-05-13 | Panasonic Electric Works Co Ltd | 放電灯点灯装置及び照明器具 |
| JP2010170966A (ja) * | 2009-01-26 | 2010-08-05 | Panasonic Electric Works Co Ltd | 高圧放電灯点灯装置及びそれを用いた照明器具とプロジェクタ用の光源点灯装置 |
| CN101873755B (zh) * | 2009-04-24 | 2014-04-16 | 松下电器产业株式会社 | 放电灯点灯装置及照明器具 |
| US8004198B2 (en) * | 2009-05-28 | 2011-08-23 | Osram Sylvania Inc. | Resetting an electronic ballast in the event of fault |
| US20100327759A1 (en) * | 2009-06-24 | 2010-12-30 | Koninklijke Philips Electronics N.V. | Electronic ballast for a fluorescent lamp |
| KR101658210B1 (ko) * | 2010-02-19 | 2016-09-21 | 페어차일드코리아반도체 주식회사 | 예열 제어 장치, 이를 포함하는 램프 구동 장치및 예열 제어 방법 |
| US8384310B2 (en) * | 2010-10-08 | 2013-02-26 | General Electric Company | End-of-life circuit for fluorescent lamp ballasts |
| US8593078B1 (en) * | 2011-01-11 | 2013-11-26 | Universal Lighting Technologies, Inc. | Universal dimming ballast platform |
| CN102834637B (zh) * | 2011-04-11 | 2014-12-31 | 丰田自动车株式会社 | 车辆用制动单元的防蚀装置 |
| JP5828106B2 (ja) * | 2011-04-13 | 2015-12-02 | パナソニックIpマネジメント株式会社 | 固体光源点灯装置およびそれを用いた照明器具 |
| CN103683894B (zh) * | 2012-08-31 | 2017-12-26 | 欧司朗股份有限公司 | 功率因数校正电路及包含该功率因数校正电路的驱动器 |
| JP6110162B2 (ja) * | 2013-03-01 | 2017-04-05 | 株式会社三社電機製作所 | 放電ランプ点灯装置 |
| ITTO20130188A1 (it) * | 2013-03-08 | 2014-09-09 | Itt Italia Srl | Circuito per la protezione galvanica di un gruppo disco-pastiglia freno per un autoveicolo e relativi kit e metodo |
| TWI513372B (zh) * | 2014-01-03 | 2015-12-11 | Delta Electronics Inc | 螢光燈電子安定器 |
| WO2019134852A1 (en) * | 2018-01-02 | 2019-07-11 | Signify Holding B.V. | A lighting drive, lighting system and control method |
| CN111029082B (zh) * | 2019-11-27 | 2023-02-28 | 中国电力科学研究院有限公司 | 一种消除变压器铁心剩磁输出恒压变频电压的装置及方法 |
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| CH663508A5 (de) * | 1983-09-06 | 1987-12-15 | Knobel Elektro App | Elektronisches vorschaltgeraet fuer fluoreszenzlampen sowie verfahren zu dessen betrieb. |
| EP0359860A1 (de) * | 1988-09-23 | 1990-03-28 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zum Betreiben mindestens einer Gasentladungslampe |
| US5170099A (en) * | 1989-03-28 | 1992-12-08 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device |
| JP2587716B2 (ja) * | 1990-09-25 | 1997-03-05 | 株式会社小糸製作所 | 車輌用放電灯の点灯回路 |
| EP0677982B1 (de) * | 1994-04-15 | 2000-02-09 | Knobel Ag Lichttechnische Komponenten | Verfahren zum Betrieb eines Vorschaltgeräts für Entladungslampen |
| US6127788A (en) * | 1997-05-15 | 2000-10-03 | Denso Corporation | High voltage discharge lamp device |
| US6515431B2 (en) * | 2001-02-05 | 2003-02-04 | Yin Nan Enterprises Co., Ltd. | Multi-lamp protection circuit for an electronic ballast |
| JP4144417B2 (ja) * | 2003-04-22 | 2008-09-03 | 松下電工株式会社 | 放電灯点灯装置及び照明器具 |
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2005
- 2005-11-29 US US11/792,073 patent/US7436123B2/en not_active Expired - Fee Related
- 2005-11-29 CN CN2005800416764A patent/CN101073293B/zh not_active Expired - Fee Related
- 2005-11-29 WO PCT/JP2005/021832 patent/WO2006059583A1/ja not_active Ceased
- 2005-11-29 EP EP05811196A patent/EP1819205B1/en not_active Ceased
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| JP2003059681A (ja) * | 2001-08-09 | 2003-02-28 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
| JP2003203795A (ja) * | 2001-12-28 | 2003-07-18 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20070296355A1 (en) | 2007-12-27 |
| EP1819205A4 (en) | 2009-07-29 |
| US7436123B2 (en) | 2008-10-14 |
| EP1819205B1 (en) | 2011-10-05 |
| CN101073293A (zh) | 2007-11-14 |
| EP1819205A1 (en) | 2007-08-15 |
| CN101073293B (zh) | 2010-08-18 |
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