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WO2005051050A1 - Appareil et procede d'allumage synchronise de deux ampoules par un ballast - Google Patents

Appareil et procede d'allumage synchronise de deux ampoules par un ballast Download PDF

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Publication number
WO2005051050A1
WO2005051050A1 PCT/KR2003/002633 KR0302633W WO2005051050A1 WO 2005051050 A1 WO2005051050 A1 WO 2005051050A1 KR 0302633 W KR0302633 W KR 0302633W WO 2005051050 A1 WO2005051050 A1 WO 2005051050A1
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WO
WIPO (PCT)
Prior art keywords
bulbs
voltage
ofthe
inverter
igniter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2003/002633
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English (en)
Inventor
Young-Rok Kang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kdg Eng
Original Assignee
Kdg Eng
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kdg Eng filed Critical Kdg Eng
Priority to AU2003284707A priority Critical patent/AU2003284707A1/en
Publication of WO2005051050A1 publication Critical patent/WO2005051050A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H05B41/288—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 preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/2881—Load circuits; Control thereof
    • 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
    • H05B41/288—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 preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions

Definitions

  • a ballast generally provides a high starting voltage required to start a lamp, and limits a current in the lamp to a predetermined value after the lamp is turned on. For this reason, it is required for the ballast to provide a high voltage ignition pulse for lighting Hie lamp and provide an instantaneous current and an open circuit voltage suitable for transitioning the discharge state after the ignition, and further to perfonn a lighting control suitable for rapidly turning on the lamp in the case of a cold start. In addition, a uniform power must be supplied to the lamp to achieve a stabilized light output and a long life in the steady state. However, it is difficult to control the lamp power and design a controller since the bulb voltage ofthe lamp varies greatly depending on individual lamps and it increases as the lamp continues to operate.
  • the present invention has been made in view ofthe above problems, and it is an object of the present invention to provide an apparatus for simultaneously lighting two independent bulbs or left and right lamps with one ballast in an HID (High Intensity Discharge) system used as car headlights, wherein two inverters, a step down chopper and an igniter including a double layer foil having a capacitor layer shape are provided so that an unbalanced load between the two bulbs or the left and right lamps are controlled to simultaneously light the two bulbs or the left and right lamps.
  • HID High Intensity Discharge
  • an apparatus for simultaneously lighting two bulbs with one ballast comprising: a flyback converter; a power supply unit; a P WM controller; first and second gate drivers; a full bridge inverter including a first inverter and a second inverter, said first inverter detecting and sensing an output voltage and an output current, outputted when a left lamp operates, througli 5th, 7th and 8th sensing resistors and an 11th sensing resistor, which are coupled to one side ofthe full bridge inverter, said second inverter detecting and sensing an output voltage and an output current, outputted when a right lamp operates, through 12th, 14th and 15th sensing resistors and a 16th sensing resistor; a controller for receiving an input voltage from the power supply unit and receiving an input current through a 10th resistor to maintain an output power at a uniform level and thus stabilize a power supplied to each load, and detecting an input voltage from the power supply unit and receiving an input current through a 10th resistor to maintain an output power at
  • a method for simultaneously lighting two bulbs with one ballast comprising the steps of: a) perfonning a voltage control operation by measuring a value of an input and output voltage, and then maxiinizing a duty rate at a flyback converter and applying a high voltage to a secondary side of a transfonner until the bulbs start to light so that an igniter can operate in a time section when the bulbs do not start to light after power is applied to the ballast; b) allowing first and second gate drivers to simultaneously light two independent lamps or a lamp having two bulbs in a single body under control of a controller; c) perfoiining a current control operation to allow the ballast to cause a large amount of current to flow in with free movement of electric charges between a lighting start time section and a transition time section of the bulbs so that a DC operation is stabilized; and d) perfo ⁇ riing a power control operation to allow the ballast to measure an input voltage and current and an output voltage
  • Fig. 1 is a circuit diagram showing an apparatus for simultaneously lighting two bulbs with one ballast according to the present invention
  • Fig. 2 is a graph illustrating the operation ofthe apparatus for simultaneously lighting two bulbs with one ballast according to the present invention
  • Fig. 3 illustrates the operation of a flyback converter when voltage control is perfonned according to an embodiment ofthe present invention
  • Fig. 4 illustrates the operation of a flyback converter when current control is perfonned according to an embodiment ofthe present invention
  • Fig. 5 shows an igniter having an "LT'-shaped coil configuration according to an embodiment ofthe present invention
  • Fig. 1 is a circuit diagram showing an apparatus for simultaneously lighting two bulbs with one ballast according to the present invention
  • Fig. 3 illustrates the operation of a flyback converter when voltage control is perfonned according to an embodiment ofthe present invention
  • Fig. 4 illustrates the operation of a flyback converter when current control is perfonned according to an embodiment ofthe present invention
  • Fig. 5 shows an igniter having an "LT
  • FIG. 6 shows an igniter having a double-layer coil configuration according to an embodiment ofthe present invention
  • Fig. 7 shows an igniter having a serial-type coil configuration according to an embodiment ofthe present invention
  • Fig. 8 is a flow chart showing a method for simultaneously lighting two bulbs with one ballast according to the present invention
  • Fig.9 is a detailed flow chart showing a simultaneous Ughting control operation in the method for simultaneously Ughting two bulbs with one ballast according to the present invention.
  • Fig. 1 is a circuit diagram showing an apparatus for simultaneously Ughting two bulbs with one baUast according to the present invention.
  • the apparatus includes a flyback converter 10, a full bridge inverter 20/30, a controUer 40, a PWM (Pulse Width Modulation) controUer 16, a step down chopper 15, gate drivers 23 and 33, and an igniter 70.
  • Hie full bridge inverter 20/30 includes a first half bridge inverter 20 for operating the left lamp 50 and a second half bridge inverter 30 for operating the right lamp 60.
  • the configurations and operations ofthe PWM controller 16 and tlie gate drivers 23 and 33 are well known in the art and thus a detailed description thereof will be omitted.
  • the flyback converter 10 is connected to an input voltage detector 12, an input cuirent detector 13, a transformer TI, and diodes Dl, D2, D3 and D4.
  • the input voltage detector 12 is connected to the circuit ofthe flyback converter 10 at one side thereof to detect an input voltage inputted from a battery and a generator, as a power supply unit for a vehicle, according to a predetei ined resistance ratio between a register R3 and a register R.4.
  • the input current detector 13 is connected to the circuit at one side ofthe input voltage detector 12 to detect an input current inputted to switching transistors S3 and S4 that are turned on/off by a control signal of the PWM controUer 16 at the initial operation.
  • the transformer TI is connected to the circuit at the top thereof to boost and output voltages V+ and V- ofthe battery and generator as the switching transistors S3 and S4 are turned on off.
  • the input voltage detector 12 detects whether a uniform voltage of 12V is suppUed to each load. By using a sensing resistor R10, the input current detector 13 detects whether a unifonn current flows in the transfonner TI on the basis of a current command value provided from the controller 40.
  • the first inverter 20 includes sensing resistors coupled to a portion of the flyback converter 10 and thus has a sensing function to control any one of two independent lamps or a lamp having two bulbs to operate as a left lamp 50. As shown in Fig. 1, the first inverter 20 includes sensing resistors R5, R7 and R8, an electrolytic capacitor C7 and a sensing resistor Rl l.
  • the first inverter 20 is connected to an output voltage detector 22, an output current detector 21 and switching transistors SI, S2, S5 and S6.
  • the output voltage detector 22 is connected between the two sensing resistors R7 and R8 to detect a voltage outputted when the left lamp 50 operates.
  • the output current detector 21 detects a DC current flowing in through the igniter 70 when the lamp initially operates.
  • the switching transistors SI, S2, S5 and S6 are switched on/off based on a drive signal outputted from the gate driver 23.
  • the second inverter 30 includes sensing resistors coupled to a portion ofthe flyback converter 10 and thus has a sensing function to control any one of two independent lamps or a lamp having two bulbs to operate as a right lamp 60.
  • the second inverter 30 includes sensing resistors R12, R14 and R15, an electrolytic capacitor CIO and a sensing resistor R16.
  • the second inverter 30 is connected to an output voltage detector 32, an output current detector 31 and switching transistors S7, S8, S9 and S10.
  • the output voltage detector 32 is connected between the two sensing resistors R14 and R15 to detect a voltage outputted when the right lamp 60 operates.
  • the output current detector 31 detects a DC current flowing in it through the igniter 70 when the lamp initiaUy operates.
  • the switching transistors SI, S2, S5 and S6 are switched on/off based on a drive signal outputted from the gate driver 33.
  • the controUer 40 has features including a PWM generator, a lamp power stabilizer, a lamp temperature compensator, and an overall fault protection circuit.
  • the controller 40 receives an input voltage from the power supply unit and controls a voltage provided to each load by keeping the input current at a unifonn or constant level through the resistor R10 at the initial operation.
  • the controller 40 controls an unbalanced load between the two lamps or bulbs by detecting an output current and an output voltage produced when the first and second inverters 20 and 30 operate. As shown in Fig. 1, the controller 40 is connected to the input voltage detector 12, the input current detector 13, the output current detector 21, the output voltage detectors 22 and 32, the PWM controller 16, and the gate driver 23.
  • the input voltage detector 12 is used to adjust the initial voltage to a unifonn or constant voltage of 12V.
  • the input current detector 13 is connected to the input voltage detector 12 at one side thereof to obtain a unifonn voltage on the basis of a current command value provided from the controUer 40.
  • the output current detector 21 is used to control a DC cunent in the igniter 70 that varies depending on the ignition state of the lamp.
  • the output voltage detectors 22 and 32 detect output voltages, respectively, outputted when the left and right lamps operate.
  • the PWM controUer 16 allows the flyback converter 10 to output a DC voltage of a predetennined level and a DC voltage whose level varies depending on the ignition state ofthe lamp.
  • the gate driver 23 provides a gating signal as a control signal to aUow the first and second inverters 20 and 30 to output a rectangular AC voltage.
  • the step down chopper 15 as a buck converter is connected to the controller 40 and operates in the Mowing manner. In order to control an unbalanced load occurring when the lamp initially operates, the step down chopper 15 firstly adjusts a power of one of the two bulbs having a higher resistance to a reference power and then controls a bulb voltage ofthe other bulb having a lower resistance, so as to maintain the powers ofthe two bulbs uniformly.
  • the igniter 70 has a primary portion in a capacitor layer fonn and has two secondary portions provided at one side ofthe primary portion, and the two secondary portions are connected respectively to the left and right lamps 50 and 60.
  • the igniter 70 having one primary coil and two secondary coils is based on the following coiling scheme. As shown in Fig. 5. a primary portion 71 is fo ⁇ ned in the igniter 70 at one side thereof, and two secondary portions 72 and 73 are vertically arranged at one side ofthe primary portion 71 so that the two primary and secondary portions have a "TI" shape.
  • Fig. 5 Alternatively, as shown in Fig.
  • One ofthe two secondary portions configured as described above is connected to the left lamp 50 and the other is connected to the right lamp 60, so that any one of two bulbs or left and right lamps can be controUed with a single baUast, instead of using two baUasts.
  • the coU be made of an aluminum foU that has high thermal and electric conductivity and also has high corrosion resistance in the air.
  • an apparatus for simultaneously Ughting two bulbs with one baUast includes a flyback converter 10, a full bridge inverter 20/30, a power supply unit 11, a PWM controUer 16, and gate drivers 23 and 33, as described above, and also has the following features.
  • the flyback converter 10 includes an input voltage detector 12, an input current detector 13, a step down chopper 15 and output current detectors 21 and 31.
  • the fuU bridge inverter 20/30 includes a first inverter 20 having a sensing function for operating the left lamp 50 and a second inverter 30 having a sensing function for operating the right lamp 60.
  • a foil-shaped igniter 70 provided in the apparatus includes two secondary portions 72 and 73, fonned as a double layer having a capacitor layer shape, so that it is connected to both the left and right lamps 50 and 60.
  • the lamp operating state is divided into a breakdown time section in which discharge starts, a glow discharge time section in which glow discharge occurs due to ion coUision, a glow-to-arc transition time section in which the lamp is transitioned from a glow discharge state to an arc discharge state, and an arc discharge time section in which arc discharge occurs due to thermionic emission.
  • a high voltage pulse for ignition is applied across two electrodes of a lamp to break an internal insulating state thereof.
  • 2 KV is required in the case of a cold start (initial ignition)
  • 25 KV is required in the case of a hot start (re-ignition).
  • the present invention adopts an igniter 70 capable of outputting a high ignition voltage of 25 KV or more.
  • a voltage for mamtaining the glow discharge state after the lamp has been ignited is appUed to the lamp in the glow discharge time section in which the glow discharge occurs due to ion collision, hi the present invention, a voltage of about 600V is applied to the lamp before the lamp is ignited, so that the lamp maintains the glow state after the ignition.
  • a take-over current circuit is provided for the glow-to-arc transition time section in which the lamp is transitioned from the glow discharge state to the arc discharge state after it is ignited. Unless a sufficient take-over cunent is supplied to the lamp, the lamp fails to light.
  • tlie take-over cu ⁇ ent circuit causes a cuitent to flow to the lamp until a sufficient current is supplied from the ballast to the lamp.
  • the internal temperature and pressure ofthe lamp increases due to power. suppUed from the baUast after the lamp has been transitioned from the glow discharge state to the arc discharge state. At this time, the voltage and optical output ofthe lamp also increases to reach a steady state.
  • the lamp power is adjusted to a desired power under the control ofthe controUer in the present invention.
  • the power , suppUed to the lamp is uniformly controlled to a rated value to prevent both flickering ofthe lamp and reduction in the lamp Ufe.
  • the controUer 40 has features including a PWM generator, a lamp power stabilizer, a lamp temperature compensator, and an overaU fault protection circuit.
  • the controller 40 receives an input voltage and an input ⁇ urent respectively from a battery and a generator, and maintains the output power at a unifonn level to control a power supplied to each load, and also controls an output voltage and an output current that are suppUed to the first and second inverters 20 and 30.
  • tl e controller allows the output voltage detectors 22 and 32 to detect an output voltage applied between the sensing resistors R7 and R8 and an output voltage applied between the sensing resistors R14 and R15 when the left and riglit lamps 50 and 60 operate. If the detection result is that an unbalanced load is increased in one of the two lamps, the controller 40 increases the system short capacity and thus maintains the output voltage at a uniform level so as to control the unbalanced load. In addition, when the step down chopper 15 operates, the controller 40 produces a control signal to control the input voltage and the input current of a uniform level inputted to the step down chopper 15, so as to control the unbalanced load caused between the two bulbs when the lamp initiaUy operates.
  • the controUer 40 controls the gate driver 23 ofthe first inverter 20 and the gate driver 33 ofthe second inverter 30 so as to simultaneously light the left and right lamps 50 and 60.
  • the operation ofthe first inverter 20 w l now be described.
  • the first inverter 20 is operated by repeatedly turning on and off a pair of switches alternately. That is, it can be seen from the operating waveforms ofthe switches that the switches have flie same voltage stress as the input voltage, but it can be seen from the primary voltage wavefonn ofthe transformer that the maximum value is twice as high as that ofthe half bridge. This means that the output is doubled and it is possible to obtain an output twice as high as that ofthe half bridge under the same condition.
  • the input current becomes the switch curcent, so that the intensity ofthe output current ofthe inverter is a half of that ofthe switch current under the same output condition.
  • the current in the circuit of the first inverter 20 is expressed by the foUowing equation.
  • the first inverter 20 senses an output voltage of 50V through the sensing resistors R5, R7 and R8 and the sensing resistor Rl 1 at a predetermined ratio, and applies it to the left lamp 50 through the gate driver 23 or decreases a current flowing from the igniter 70 to the sensing resistor Rl 1 as the lamp resistance increases, thus decreasing the sensed intensity, so as to control the unbalanced load between the two lamps.
  • tlie output voltage detector 22 detects an output voltage between the sensing resistor R7 and the sensing resistor R8, and the transistors SI, S2, S5 and S6 are switched on/off with a drive signal outputted from the gate driver 23, so as to light the left lamp 50.
  • the operations ofthe igniter 70 and the step down chopper 15 are described as foUows.
  • a voltage applied from the power supply unit reaches a predetermined voltage in the range of 400V ⁇ 600V, it is suppUed to tlie igniter 70 through a self-transferred electronic spark gap.
  • the igniter 70 starts discharge ofthe bulb by producing discharge electricity required to cause the initial glow discharge ofthe bulb.
  • the inverter opens the current pass in one direction to continuously supply the power, and the two secondary portions according to the present invention are connected respectively to the two bulbs to supply a voltage required for the discharge.
  • the controller performs a voltage control operation in such a manner that it measures the value ofthe input and output voltage, and then maximizes the duty rate at the flyback converter and applies a high voltage to the secondary side ofthe transfonner until the Ughting starts ("voltage control step" SI 10).
  • a power supply voltage of 12V of a battery as a power supply for vehicles is increased in voltage and smoothed at the flyback converter.
  • the gate drivers 23 and 33 simultaneously light two independent lamps or a lamp having two bulbs in a single body (S 120).
  • a full bridge converter duty rate Di is determined (S230) as expressed in the following equation.
  • the duty rates Dl and D2 determined in such a manner are added to determine an optimal duty rate, so as to apply a DC voltage in the range of 400V to 600V suitable for the operations ofthe first and second inverters (S240).
  • the DC voltage produced in such a manner is automaticaUy provided to the igniter througli tlie electronic spark gap.
  • a voltage required for the initial glow discharge is produced to start the discharge (S250).
  • the bulbs are simultaneously lit (S260).
  • the respective powers ofthe left and right lamps are compared with each other (S270).
  • the first inverter detects and senses an output voltage and an output cuirent outputted when the left lamp operates, through the sensing resistors R5, R7 and R8 and the sensing resistor Rll, whereas the second inverter detects and senses an output voltage and an output cuirent outputted when the right lamp operates, tiirough the sensing resistors R12, R14 and R15 and the sensing resistor R16, so that alternate control between tlie first and second inverters is perfonned (S300). If one of the left and right lamps has a smaU power, alternate control between the inverters is performed in the same manner as described above (S280) to keep the bulbs Ut with a unifonn constant power (S310).
  • the baUast causes a large amount of current to flow in with free movement of electric charges between the Ughting start time section and the transition time section ofthe bulb, so that the DC operation is stabUized ("current control step" S 130).
  • a Vj n is directly appUed to the primary side ofthe transfonner having an inductance L p .
  • the input voltage is an ideal DC voltage
  • a period of time t for which the transistors S3 and S4 are turned on is equal to a duty cycle D ofthe switching period T. At that time, the input current increases as expressed in the foUowing equation.
  • the second inverter 30 detects and senses an output voltage and an output current produced from a high voltage ofthe igniter, which vary depending on the ignition state ofthe right lamp 60, through the sensing resistors R12, R14 and R15 and the sensing resistor R16.
  • the controUer 40 compares the value of an output current ofthe transformer TI with a predetermined current value, and controls the frequency and the pulse width ofthe PWM control signal if the compared value is out of a predetermined range, so that the output current ofthe transfonner TI can be kept unifonn.
  • the apparatus according to the present invention includes two inverters, a step down chopper and an igniter including a double layer foil having a capacitor layer shape, so that it effectively controls the unbalanced load between two bulbs or left and right lamps, thereby making it possible to simultaneously light the two bulbs or the left and right lamps with one baUast.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Cette invention concerne un appareil permettant d'allumer deux ampoules à l'aide d'un ballast et un procédé de commande de cet appareil. Afin de permettre à un seul ballast, et non pas deux, de commander deux ampoules ou les lampes de gauche et de droite dans un système DHI (à décharge à haute intensité) utilisées comme phares de véhicule, l'appareil comporte deux onduleurs dotés de fonctions de détection, un hacheur abaisseur chargé de commander une charge mal équilibrée entre les deux ampoules, ainsi qu'un allumeur comprenant une feuille métallique douche couche se présentant sous la forme d'une couche de condensateur, de façon qu'une charge mal équilibrée entre les deux ampoules ou lampes puisse être commandée, ce qui permet d'allumer simultanément les deux ampoules ou les lampes de gauche et de droite à l'aide d'un seul ballast.
PCT/KR2003/002633 2003-11-21 2003-12-03 Appareil et procede d'allumage synchronise de deux ampoules par un ballast Ceased WO2005051050A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003284707A AU2003284707A1 (en) 2003-11-21 2003-12-03 The apparatus and method for synchronous lighting by one ballast with two bulb

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0083196 2003-11-21
KR1020030083196A KR100446102B1 (ko) 2003-11-21 2003-11-21 두개의 방전관을 하나의 발라스터로 동시점등하는 장치및제어방법

Publications (1)

Publication Number Publication Date
WO2005051050A1 true WO2005051050A1 (fr) 2005-06-02

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PCT/KR2003/002633 Ceased WO2005051050A1 (fr) 2003-11-21 2003-12-03 Appareil et procede d'allumage synchronise de deux ampoules par un ballast

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KR (1) KR100446102B1 (fr)
CN (1) CN1879455A (fr)
AU (1) AU2003284707A1 (fr)
WO (1) WO2005051050A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2045894A1 (fr) * 2007-08-07 2009-04-08 Hella KG Hueck & Co. Installation d'éclairage pour véhicule automobile
CN101018439B (zh) * 2006-02-10 2010-08-04 鸿富锦精密工业（深圳）有限公司 放电灯驱动装置
CN119052969A (zh) * 2024-08-27 2024-11-29 北京东方百士电子有限公司 一种用于监测双灯功率均衡的电子镇流器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101237739B (zh) * 2007-05-18 2011-04-20 张福明 Hid镇流器及控制方法
US8008873B2 (en) * 2009-05-28 2011-08-30 Osram Sylvania Inc. Restart circuit for multiple lamp electronic ballast

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036256A (en) * 1990-06-21 1991-07-30 Gte Products Corporation Arc discharge ballast suitable for automotive applications
EP0633711A1 (fr) * 1992-03-25 1995-01-11 Toto Ltd. Regulateur de tension de lampe a decharge et appareil d'eclairage en couleur modulable mettant en uvre ce regulateur
US5569984A (en) * 1994-12-28 1996-10-29 Philips Electronics North America Corporation Method and controller for detecting arc instabilities in gas discharge lamps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036256A (en) * 1990-06-21 1991-07-30 Gte Products Corporation Arc discharge ballast suitable for automotive applications
EP0633711A1 (fr) * 1992-03-25 1995-01-11 Toto Ltd. Regulateur de tension de lampe a decharge et appareil d'eclairage en couleur modulable mettant en uvre ce regulateur
US5569984A (en) * 1994-12-28 1996-10-29 Philips Electronics North America Corporation Method and controller for detecting arc instabilities in gas discharge lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101018439B (zh) * 2006-02-10 2010-08-04 鸿富锦精密工业（深圳）有限公司 放电灯驱动装置
EP2045894A1 (fr) * 2007-08-07 2009-04-08 Hella KG Hueck & Co. Installation d'éclairage pour véhicule automobile
CN119052969A (zh) * 2024-08-27 2024-11-29 北京东方百士电子有限公司 一种用于监测双灯功率均衡的电子镇流器

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AU2003284707A1 (en) 2005-06-08
CN1879455A (zh) 2006-12-13
KR100446102B1 (ko) 2004-08-25

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