CN106061078B - A kind of starting and control circuit of electronic amperite of gas-discharge lamp - Google Patents
A kind of starting and control circuit of electronic amperite of gas-discharge lamp Download PDFInfo
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- CN106061078B CN106061078B CN201610394044.6A CN201610394044A CN106061078B CN 106061078 B CN106061078 B CN 106061078B CN 201610394044 A CN201610394044 A CN 201610394044A CN 106061078 B CN106061078 B CN 106061078B
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- 239000003990 capacitor Substances 0.000 claims description 33
- 239000013078 crystal Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 10
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- H05B41/282—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
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2853—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention discloses a kind of starting of electronic amperite of gas-discharge lamp and control circuit, the circuit includes frequency sweep generation circuit, identification trigger circuit, a frequency sweep circuit and enabled circuit；The frequency sweep generation circuit is for generating the PWM wave that frequency changes from high to low；The identification trigger circuit is used for after frequency sweep to resonance point and triggering fluorescent tube, by modifying resonant parameter, eliminates security risk when ballast works normally；When frequency sweep circuit is for ballast zero load at the beginning or overload, making PWM wave, only frequency sweep is primary, eliminates the security risk under ballast special state.The present invention lights the PWM wave of triggering fluorescent tube by frequency sweep generation circuit, frequency sweep generation circuit is disconnected by identification trigger circuit and security risk can be reduced by modification resonant parameter, and ballast is eliminated by a frequency sweep circuit and is initially in unloaded or overload security risk.Simulation circuit structure provided by the invention is simple, low in cost, has practical value.
Description
Technical field
The present invention relates to the technical fields of ballast circuit, more particularly, to a kind of opening for electronic amperite of gas-discharge lamp
Dynamic and control circuit.
Background technique
The advantages that high-voltage gas discharging light is high, the service life is long and colour rendering is good with its light efficiency, in Green Lighting Project by
Favor, also therefore, it has become apply hot spot for matched electronic ballast of high intensity gas discharge lamp.High intensity discharge
One indispensable characteristic of lamp electronic ballast is exactly the high voltage that can be provided high-intensity gas discharge lamp lighting and trigger, and main
Implementation often all by the way of resonant trigger, but use the high-intensity gas discharge lamp electronic ballast of resonant trigger
There is some potential safety problemss for meeting after device powers on, so resonant trigger often requires to use frequency sweep control.Frequency sweep function
Digital circuit can both be used by realizing, can also be realized by the way of analog circuit.With digital circuit frequency sweep function
It is easier, is also easy to realize the breakdown judge and defencive function after starting, so the high-intensity gas discharge lamp electricity in industry
Sub-ballast is all much the form using digital circuit, is the mode with software computer language control PWM wave duty ratio
To realize frequency sweep.Compared to digital circuit, the cost of analog circuit is much lower, but is difficult to realize and number using analog circuit
The identical starting of circuit and control function.
Summary of the invention
In order to solve the technical problem present on, the present invention proposes a kind of realizing town in a manner of analog circuit
Flow the circuit of the frequency sweep triggering starting of device and breakdown judge and defencive function after starting.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of starting and control circuit of electronic amperite of gas-discharge lamp, the starting and control circuit include that frequency sweep produces
Raw circuit, identification trigger circuit, a frequency sweep circuit and enabled circuit；
The frequency sweep generation circuit is for generating the PWM wave that frequency changes from high to low；The frequency sweep generation circuit it is defeated
Enter end connection control voltage, the input terminal of the output end connection identification trigger circuit of the frequency sweep generation circuit；
The identification trigger circuit is used for after frequency sweep to resonance point and triggering fluorescent tube, by changing circuit work shape
State eliminates the security risk of ballast in normal work；The input terminal of the identification trigger circuit connects frequency sweep generation circuit
Output end, the output end of the identification trigger circuit connects the input terminal of enabled circuit；
When frequency sweep circuit is used for ballast unloaded at the very start or overload, so that only frequency sweep is primary for PWM wave, disappear
Except security risk of the ballast under special state；The input terminal connection control voltage of frequency sweep circuit, it is described primary
The input terminal of the output end connection identification trigger circuit of frequency sweep circuit.
Further, the frequency sweep generation circuit includes two charge and discharge branches, and two charge and discharge branches are arranged symmetrically, often
The component that a charge and discharge branch includes is identical, and the charge and discharge branch includes two resistance, a capacitor and three pole of crystal
Pipe, one end of two resistance are separately positioned on the both ends of capacitor, branch where the tie point of a resistance and capacitor is connected to
The collector of transistor, the base stage of the transistor are connected to the company of capacitor and resistance in another charge and discharge branch
The emitter connect and ground of transistor in contact, the emitter of the transistor and another charge and discharge branch.
Further, it is connect in a charge and discharge branch with the other end of the connected connecting resistance of the collector of transistor
Control voltage.
Further, the identification trigger circuit includes two transistors and a resistance, and one end of resistance connects
Voltage is controlled, the other end connects the base stage of a transistor and the collector of another transistor.
Further, the collector of the transistor of base stage connection resistance is connected to frequency sweep production in the identification trigger circuit
Raw circuit.
Further, the collector for the transistor that base stage connects resistance in the identification trigger circuit, which is connected to, once to be swept
Frequency circuit.
Further, a frequency sweep circuit include a charging circuit, charging circuit protection circuit and
One discharge circuit, the protection circuit of the charging circuit is for protecting the charging circuit, and the discharge circuit is for charging
The electric discharge of capacitor in circuit, the output end of the charging circuit connect the protection circuit of the charging circuit, the charging circuit
Input terminal connect the input terminal of the discharge circuit.
Further, the protection circuit of the charging circuit includes first crystal triode and first resistor, and described first
One end of the base stage connection first resistor of transistor, the emitter of the first crystal triode connect the another of first resistor
One end is simultaneously grounded；The charging circuit includes the second transistor, second resistance, 3rd resistor and first capacitor, and described the
One end connection control voltage of two resistance, one end of the other end connection 3rd resistor of the second resistance, the second resistance
The emitter of the second transistor is connect with the tie point of 3rd resistor, the other end and first capacitor of the 3rd resistor connect
Connect and be grounded, the first capacitor is connect with the base stage of the second transistor, the collector of second transistor with
The base stage of first crystal triode connects；The discharge circuit includes that the 4th resistance, the 5th resistance, the 6th resistance and third are brilliant
One end of body triode, the 4th resistance is connect with the emitter of third transistor, the other end of the 4th resistance
It is connect with the base stage of third transistor, the collector of the third transistor is connect with one end of the 5th resistance, institute
The one end for stating the 6th resistance is connect with the tie point of the base stage of third transistor and the 4th resistance, the 5th resistance it is another
The other end connect and ground of one end and the 6th resistance, the emitter of the third transistor and the tie point of the 4th resistance
It is connect with the tie point of the base stage of the second transistor and first capacitor.
Further, the 4th resistance connect control voltage with the tie point of the base stage of third transistor.
Further, third transistor is positive-negative-positive transistor, other third transistors in the present invention
For NPN type transistor.
Technical solution of the present invention provides frequency sweep generation circuit and identification trigger circuit, frequency sweep by way of analog circuit
After the PWM wave of generation circuit generation frequency sweep, by identifying that trigger circuit makes ballast identification triggering, hereafter change circuit work shape
State resonant frequency point is arranged near the not fixed frequency when ballast works, so that fixed frequency when ballast works
It, can when encountering some emergency cases in practical applications and for example exporting thread breakage or short on Frequency point far from resonance point
With the intact of the protection ballast internal components of safety, to eliminate the security hidden trouble of ballast in normal work；When
Ballast is initially under unloaded or overload situations, and a frequency sweep circuit is provided by way of analog circuit makes frequency sweep time
Number is only limited to once, then with regard to no longer carrying out frequency sweep, to eliminate the security hidden trouble after ballast powers on, reach ballast
The purpose of breakdown judge and defencive function after starting.The simulation circuit structure that technical solution of the present invention provides is simple, cost
It is cheap, there is practical value.
Detailed description of the invention
Fig. 1 is system block diagram provided by the present invention；
Fig. 2 is circuit diagram provided by the present invention；
Fig. 3 is the onset wave provided by the present invention for generating frequency sweep PWM wave；
Fig. 4 is the end waveform provided by the present invention for generating frequency sweep PWM wave；
Fig. 5 is the PWM waveform of identification triggering provided by the present invention；
Fig. 6 is the waveform of a frequency sweep provided by the present invention；
In figure: I- frequency sweep generation circuit；II- identifies trigger circuit；Frequency sweep circuit of III-；IV- enables circuit.
Specific embodiment
The present invention is further described through referring to the drawings and specific embodiments.
A kind of starting and control circuit of electronic amperite of gas-discharge lamp, starting and control circuit include that frequency sweep generates electricity
Road I, identification trigger circuit II, a frequency sweep circuit III and enabled circuit I V；
Frequency sweep generation circuit I is for generating the PWM wave that frequency changes from high to low；The input terminal of frequency sweep generation circuit I connects
Connect control voltage, the input terminal of the output end connection identification trigger circuit II of frequency sweep generation circuit I；
Identify that trigger circuit II is used for after frequency sweep to resonance point and triggering fluorescent tube, by changing circuit working state,
Eliminate the security risk of ballast in normal work；Identify that the input terminal connection frequency sweep generation circuit I's of trigger circuit II is defeated
Outlet, the output end of identification trigger circuit II connect the input terminal of enabled circuit I V；
Frequency sweep circuit III is used for when ballast is unloaded or overload, so that only frequency sweep is primary for PWM wave, is eliminated
Security risk of the ballast under special state；The input terminal connection control voltage of frequency sweep circuit III, a frequency sweep circuit
The input terminal of the output end connection identification trigger circuit II of III.
Frequency sweep generation circuit I includes two charge and discharge branches, and two charge and discharge branches are arranged symmetrically, each charge and discharge branch
The component for including is identical, and charge and discharge branch includes two resistance, a capacitor and a transistor, one end of two resistance
It is separately positioned on the both ends of capacitor, the current collection of the transistor of branch where the tie point of a resistance and capacitor is connected to
Pole, the base stage of the transistor are connected to the tie point of capacitor and resistance in another charge and discharge branch, three pole of crystal
The emitter connect and ground of transistor in the emitter of pipe and another charge and discharge branch.
Control voltage is connect with the other end of the connected connecting resistance of the collector of transistor in a charge and discharge branch.
Identify that trigger circuit II includes two transistors and a resistance, one end of resistance is grounded, other end connection
The base stage of one transistor and the collector of another transistor.
The collector of the transistor of base stage connection resistance is connected to frequency sweep generation circuit in identification trigger circuit II.
The collector of the transistor of base stage connection resistance is connected to a frequency sweep circuit in identification trigger circuit II.
Frequency sweep circuit III includes a charging circuit, the protection circuit of charging circuit and an electric discharge electricity
Road, the protection circuit of charging circuit is for protecting charging circuit, electric discharge of the discharge circuit for capacitor in charging circuit, charging electricity
The protection circuit of the output end connection charging circuit on road, the input terminal of the input terminal connection discharge circuit of charging circuit.
The protection circuit of charging circuit includes first crystal triode Q1 and first resistor R1, first crystal triode Q1's
Base stage connects one end of first resistor R1, and the other end of the emitter connection first resistor R1 of first crystal triode Q1 simultaneously connects
Ground；Charging circuit includes the second transistor Q2, second resistance R2,3rd resistor R3 and first capacitor C1, second resistance R1
One end connection control voltage, second resistance R2 the other end connection 3rd resistor R3 one end, second resistance R2 and third electricity
The tie point for hindering R3 connects the emitter of the second transistor Q2, and the other end of 3rd resistor R3 is connect simultaneously with first capacitor C1
Ground connection, first capacitor C1 are connect with the base stage of the second transistor Q2, the collector of the second transistor Q2 and the first crystalline substance
The base stage of body triode Q1 connects；Discharge circuit includes the 4th resistance R5, the 5th resistance R6, the 6th resistance R7 and third crystal
One end of triode Q3, the 4th resistance R5 are connect with the emitter of third transistor Q3, the other end of the 4th resistance R5 with
The base stage of third transistor Q3 connects, and the collector of third transistor Q3 is connect with one end of the 5th resistance R6, the
One end of six resistance R7 is connect with the tie point of the base stage of third transistor Q3 and the 4th resistance R5, and the 5th resistance R6's is another
The other end connect and ground of one end and the 6th resistance R7, the connection of the emitter and the 4th resistance R5 of third transistor Q3
Point is connect with the base stage of the second transistor Q2 with the tie point of first capacitor C1.
4th resistance R5 connect control voltage with the tie point of the base stage of third transistor Q3.
Third transistor Q3 is positive-negative-positive transistor, and other third transistors are NPN type in the present invention
Transistor.
Specific embodiment of the present invention is as follows:
Frequency sweep generation circuit I is for generating the PWM wave that frequency changes from high to low: when the voltage of C106 and R132 tie point
When for high level, Q22 conducting, the voltage of C113 and R134 tie point is pulled low, and there are pressure difference, C113 starts to fill at the both ends C113
Electricity, the voltage of C113 and R133 tie point is increased as capacitor is saturated in charging process, and when being raised to certain value, Q21 is connected,
Voltage between R131 and C106 is pulled low, and C106 is started to charge, meanwhile, the electricity in the moment started to charge, between C106 and R132
Pressure is dragged down by the pressure drop of R132, and Q22 ends at this time, and C113 starts to discharge, the voltage in C106 charging process, between C106 and R132
It is increased with the saturation of capacitor, when being increased to certain value, Q22 is connected again, such iterative cycles, and both C106 and C113 are staggeredly
Charge and discharge, thus, the PWM wave of the tie point output height variation of C106 and R131.
Identification trigger circuit sweeps to resonance point for its frequency sweep, and after triggering fluorescent tube, eliminates ballast and working normally
When security hidden trouble.After triggering fluorescent tube, igniting identification Lopen becomes high level from low level, has devised in figure
The circuit of R130, Q19, Q20 composition.When Lopen becomes high level from low level, Q20 becomes being connected from ending, and Q19 is by leading
It is logical to become ending, it is disconnected at this time with frequency sweep generation circuit, into normal operating conditions, its frequency is fixed frequency at this time,
As long as resonant frequency point is arranged in the fixation or not near fixed frequency, when ballast works normally by modification resonant parameter
Frequency is not just near resonance point, to eliminate the security hidden trouble of ballast in normal work.
When frequency sweep primary circuit is for ballast zero load or overload, only frequency sweep is primary for PWM wave, eliminates ballast in spy
Security hidden trouble under different state, 5V charge to C1 by R5, and 5V passes through R2, and R3 is divided to Q2 emitter e, when capacitor C1 is slow
Q2 when being charged to Ve+0.7V that charges slowly is connected, and Q1 is caused to be also switched on, at this point, identification Lopen is in low level, so,
Q20 cut-off, Q19 conducting, so R154 comes in be low level in such as Fig. 2, so Q18 ends, the SD foot high level of UC2525 makes
It can close, output is without waveform, and it is that its SD foot low level is enabled that wherein UC2525, which generates a condition of waveform, if SD foot is height
Level, UC2525 close enabled.But capacitor C1 is gently charged to during this section of Ve+0.7V, Q2 cut-off, Q1 is also switched off,
So R154 input high level, Q18 conducting, UC2525 SD foot low level is enabled, and frequency sweep wave is presented in output.So in capacitor C1
Ve+0.7V is charged to during this, UC2525 exports frequency sweep wave, and after reaching Ve+0.7V, UC2525 is without output waveform.Work as pass
After closing power supply, the base stage of Q3 becomes 0V from 5V, and there are also Ve+0.7V, PNP type triode Q3 conducting, C1 by C1 upper (Q3 emitter pole)
It is discharged rapidly by R6, so, as long as charging time parameter C1 capacitance and R5 the resistance value design of capacitor C1 is rationally, PWM wave can
To realize only one subfunction of frequency sweep, so that it may realize the security hidden trouble for eliminating ballast under special state.
Above-mentioned specific embodiment is used to illustrate the present invention, is merely a preferred embodiment of the present invention, rather than
Limit the invention, within the spirit of the invention and the scope of protection of the claims, to the present invention make any modification,
Equivalent replacement, improvement etc., both fall within protection scope of the present invention.
Claims (9)
1. the starting and control circuit of a kind of electronic amperite of gas-discharge lamp, which is characterized in that the starting and control circuit
Including frequency sweep generation circuit, identification trigger circuit, a frequency sweep circuit and enabled circuit；
The frequency sweep generation circuit is for generating the PWM wave that frequency changes from high to low；The input terminal of the frequency sweep generation circuit
Connection control voltage, the input terminal of the output end connection identification trigger circuit of the frequency sweep generation circuit；
The identification trigger circuit is used to, by changing circuit working state, disappear after frequency sweep to resonance point and triggering fluorescent tube
Except the security risk of ballast in normal work；The output of the input terminal connection frequency sweep generation circuit of the identification trigger circuit
The output end at end, the identification trigger circuit connects the input terminal of enabled circuit；
When frequency sweep circuit is used for ballast unloaded at the very start or overload, so that only frequency sweep is primary for PWM wave, town is eliminated
Flow security risk of the device under special state；The input terminal connection control voltage of frequency sweep circuit, a frequency sweep
The input terminal of the output end connection identification trigger circuit of circuit；
The frequency sweep generation circuit includes two charge and discharge branches, and two charge and discharge branches are arranged symmetrically, each charge and discharge branch
The component for including is identical, and the charge and discharge branch includes two resistance, a capacitor and a transistor, two resistance
One end is separately positioned on the both ends of capacitor, the collection of the transistor of branch where the tie point of a resistance and capacitor is connected to
Electrode, the base stage of the transistor are connected to the tie point of capacitor and resistance in another charge and discharge branch, the crystal three
The emitter connect and ground of transistor in the emitter of pole pipe and another charge and discharge branch.
2. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 1, which is characterized in that one
Control voltage is connect with the other end of the connected connecting resistance of the collector of transistor in a charge and discharge branch.
3. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 1, which is characterized in that described
Identify that trigger circuit includes two transistors and a resistance, one end connection control voltage of resistance, other end connection one
The base stage of a transistor and the collector of another transistor.
4. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 3, which is characterized in that in institute
The collector for stating the transistor of base stage connection resistance in identification trigger circuit is connected to frequency sweep generation circuit.
5. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 3, which is characterized in that in institute
The collector for stating the transistor of base stage connection resistance in identification trigger circuit is connected to a frequency sweep circuit.
6. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 1, which is characterized in that described
Frequency sweep circuit includes the protection circuit and a discharge circuit of a charging circuit, charging circuit, the charging
For the protection circuit of circuit for protecting the charging circuit, electric discharge of the discharge circuit for capacitor in charging circuit is described
The output end of charging circuit connects the protection circuit of the charging circuit, and the input terminal of the charging circuit connects the electric discharge electricity
The input terminal on road.
7. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 6, which is characterized in that described
The protection circuit of charging circuit includes first crystal triode and first resistor, the base stage connection of the first crystal triode the
The emitter of one end of one resistance, the first crystal triode connects the other end and the ground connection of first resistor；The charging electricity
Road includes the second transistor, second resistance, 3rd resistor and first capacitor, one end connection control electricity of the second resistance
The tie point of pressure, one end of the other end connection 3rd resistor of the second resistance, the second resistance and 3rd resistor connects
The emitter of second transistor, the other end and first capacitor connect and ground of the 3rd resistor, the first capacitor
It is connect with the base stage of the second transistor, the collector of second transistor and the base stage of first crystal triode connect
It connects；The discharge circuit includes the 4th resistance, the 5th resistance, the 6th resistance and third transistor, the 4th resistance
One end connect with the emitter of third transistor, the base stage of the other end of the 4th resistance and third transistor
Connection, the collector of the third transistor are connect with one end of the 5th resistance, one end of the 6th resistance and third
The base stage of transistor is connected with the tie point of the 4th resistance, the other end of the 5th resistance and the other end of the 6th resistance
Connect and ground, the base stage of the emitter of the third transistor and the tie point of the 4th resistance and the second transistor
It is connect with the tie point of first capacitor.
8. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 7, which is characterized in that described
4th resistance connect control voltage with the tie point of the base stage of third transistor.
9. the starting and control circuit of electronic amperite of gas-discharge lamp according to claim 7, which is characterized in that third
Transistor is positive-negative-positive transistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610394044.6A CN106061078B (en) | 2016-06-06 | 2016-06-06 | A kind of starting and control circuit of electronic amperite of gas-discharge lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394044.6A CN106061078B (en) | 2016-06-06 | 2016-06-06 | A kind of starting and control circuit of electronic amperite of gas-discharge lamp |
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| CN106061078A CN106061078A (en) | 2016-10-26 |
| CN106061078B true CN106061078B (en) | 2018-12-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0098285B1 (en) * | 1982-01-15 | 1988-11-23 | Minitronics Pty. Ltd. | Electronic high frequency controlled device for operating gas discharge lamps |
| CN101583229A (en) * | 2008-05-15 | 2009-11-18 | 杭州茂力半导体技术有限公司 | Multi-discharge lamp parallel driving circuit and driving method |
| CN201541379U (en) * | 2009-07-23 | 2010-08-04 | 杨根元 | High-efficiency and reliable gas discharge lamp with electronic ballast |
-
2016
- 2016-06-06 CN CN201610394044.6A patent/CN106061078B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0098285B1 (en) * | 1982-01-15 | 1988-11-23 | Minitronics Pty. Ltd. | Electronic high frequency controlled device for operating gas discharge lamps |
| US5192897A (en) * | 1982-01-15 | 1993-03-09 | Minitronics Pty. Ltd. | Electronic high frequency controlled device for operating gas discharge lamps |
| CN101583229A (en) * | 2008-05-15 | 2009-11-18 | 杭州茂力半导体技术有限公司 | Multi-discharge lamp parallel driving circuit and driving method |
| CN201541379U (en) * | 2009-07-23 | 2010-08-04 | 杨根元 | High-efficiency and reliable gas discharge lamp with electronic ballast |
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| Publication number | Publication date |
|---|---|
| CN106061078A (en) | 2016-10-26 |
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