CN101052261B - Protector and cold cathode lamp tube driving system using said protector - Google Patents
Protector and cold cathode lamp tube driving system using said protector Download PDFInfo
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- CN101052261B CN101052261B CN2006100667735A CN200610066773A CN101052261B CN 101052261 B CN101052261 B CN 101052261B CN 2006100667735 A CN2006100667735 A CN 2006100667735A CN 200610066773 A CN200610066773 A CN 200610066773A CN 101052261 B CN101052261 B CN 101052261B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The protection device uses a short-circuit detection circuit to receives a AC high voltage power source at the high voltage side of the cold cathode lamp through a step-down capacitor, and outputs a short-circuit protection signal while the lamp suffers a short-circuit; a rectifier diode receives the AC high-voltage power source through the step-down capacitor, and outputs a DC high-voltage power source; a first charging capacitor is coupled to said rectifier diode, and according to the DC high-voltage power source, establishes a detection voltage; a open sensing circuit is coupled to the first charging capacitor to sense a threshold value of voltage; if it's more than the threshold value, it outputs a open protection signal; a lighting limitation circuit is coupled to a first charging capacitor and is used for receiving the detection voltage and outputting a high-voltage protection signal.
Description
Technical field
The present invention relates to a kind of protective device and use the cold cathode lamp tube driving system of this protective device; especially refer to that a kind of use is in cold cathode lamp tube driving system; according to the on high-tension side ac high voltage source of detecting cold cathode fluorescent lamp; give control circuit with the output protection signal, as the protective device and the cold cathode lamp tube driving system of this control circuit of protection and cold cathode fluorescent lamp.
Background technology
Cold cathode fluorescent lamp (CCFL, Cold Cathode Fluorescent Lamp) is known to be to use in display panels (LCD Panel) light source as backlight module (Backlight System).These cold cathode lamp pipings are driven by a drive circuit that is called converter (Inverter).Because technological progress and consumer demand, the LCD panel size constantly increases, and makes single fluorescent tube can't satisfy its illumination, thereby needs to use two or more a plurality of fluorescent tube.
In general; one group of converter (Iverter) only can be lighted one or two cold cathode fluorescent lamp; if be used on large LCD panel or the TV large LCD screen; then need adopt the converter (Iverter) of many groups to drive a plurality of cold cathode fluorescent lamp; also need simultaneously the protective circuits of organizing to do the protection of converter and cold cathode fluorescent lamp more; to such an extent as to the manufacturing cost height of LCD panel, and the protective circuit design is complicated, makes the layout difficulty of circuit increase.
Summary of the invention
In view of this, the invention provides a kind of protective device and cold cathode lamp tube driving system, protective device is improved at above-mentioned known shortcoming.The present invention utilizes the on high-tension side ac high voltage source of cold cathode fluorescent lamp, as the protection of open circuit/short circuit and the protection of voltage limit of lighting a lamp, and can be done real-time protection effectively when cold cathode fluorescent lamp is damaged.
The disclosed protective device of the present invention; use is in a cold cathode lamp tube driving system; in order to protect a control circuit and the cold cathode fluorescent lamp in this cold cathode lamp tube driving system, this protective device comprises: a short circuit checking circuit, a rectifier diode, one first charging capacitor, open circuit checking circuit and some modulating voltage restricting circuits.In protective device; this short circuit checking circuit one end sees through the high-pressure side that a decompression capacitor is coupled to cold cathode fluorescent lamp; the other end is coupled to a supply-voltage source; this short circuit checking circuit receives ac high voltage source in the high-pressure side of this cold cathode fluorescent lamp; and when this cold cathode fluorescent lamp is short-circuited, exports a short-circuit protection signal and give this control circuit.This rectifier diode sees through the high-pressure side that this decompression capacitor is coupled to this cold cathode fluorescent lamp, and this rectifier diode is that this ac high voltage source is carried out the rectification action, and exports a direct current high voltage source.This first charging capacitor is coupled to this rectifier diode, and this first charging capacitor is to set up a detecting voltage according to this DC high-voltage power supply.This open circuit checking circuit is coupled to this first charging capacitor, and this open circuit checking circuit has a critical value, and when this detects voltage greater than this critical value, exports an open-circuit-protection signal and give this control circuit.This voltage limiting circuit of lighting a lamp is coupled to this first charging capacitor, is to receive this detecting voltage, and exports an overtension guard signal and give this control circuit.
Cold cathode lamp tube driving system provided by the invention includes: a lamp current current equalizer, some modulating voltage restricting circuits, an open circuit checking circuit, a short circuit checking circuit, an overload checking circuit, a brightness regulating circuit, a current detector circuit, switch controlling device, this cold cathode lamp tube driving system is to use an active electronics stabilizer or the high-frequency ac transducer that always circulates to see through a transformer to drive a plurality of cold cathode fluorescent lamp simultaneously.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify protection scope of the present invention.And about other purpose of the present invention and advantage, will be set forth in follow-up explanation and icon.
Description of drawings
Fig. 1 is the system architecture schematic diagram of the present invention's use in cold cathode lamp tube driving system;
Fig. 2 is that the circuit box schematic diagram in cold cathode lamp tube driving system is used in first preferred embodiment of the present invention;
Fig. 3 is that the circuit box schematic diagram in cold cathode lamp tube driving system is used in second preferred embodiment of the present invention;
Fig. 4 is the detailed circuit schematic of the present invention's second preferred embodiment;
Fig. 5 is used in detailed circuit schematic in the multi-lamp system for the present invention; And
Fig. 6 is for using the cold cathode lamp tube driving system schematic diagram of protective device 5.
The figure number explanation:
Open circuit checking circuit 502 voltage limiting circuit 503 of lighting a lamp
Overload checking circuit 504 current detector circuits 505
Rectifier diode 506 first charging capacitors 507
Short-circuit protection signal S1 open-circuit-protection signal S2
Overtension guard signal S3 overload protection signal S4
Power adjustments signal S5 open circuit/short-circuit protection signal S6
Lamp current current equalizer 8 brightness regulating circuits 6
ON/OFF control device 7
Embodiment
Please refer to Fig. 1, be the system architecture schematic diagram of the present invention's use in cold cathode lamp tube driving system.Cold cathode lamp tube driving system includes a control circuit 1, a cold cathode fluorescent lamp 3 and protective device of the present invention 5; protective device 5 is when cold cathode fluorescent lamp 3 breaks down; export multiple guard signal and give control circuit 1, control circuit 1 can be according to the guard signal of various kinds with protection cold cathode fluorescent lamp 3 and self-protection.
Please refer to Fig. 2, be the circuit box schematic diagram of first preferred embodiment use of the present invention in cold cathode lamp tube driving system.In the present invention's first preferred embodiment, protective device 5 includes a short circuit checking circuit 501, a rectifier diode 506, one first charging capacitor 507, open circuit checking circuit 502 and some modulating voltage restricting circuits 503.
Multiple with reference to figure 2; short circuit checking circuit 501 in the protective device 5 sees through a high-pressure side and the supply-voltage source Vcc that a decompression capacitor 509 is coupled to cold cathode fluorescent lamp 3; this short circuit checking circuit 501 is to receive an ac high voltage source AC in the high-pressure side of this cold cathode fluorescent lamp 3, and exports a short-circuit protection signal S1 and give this control circuit 1 when this cold cathode fluorescent lamp 3 is short-circuited.Rectifier diode 506 sees through the high-pressure side that decompression capacitor 509 is coupled to this cold cathode fluorescent lamp 3, and this rectifier diode 506 is this ac high voltage source of rectification AC, and exports a direct current high voltage source DC.First charging capacitor 507 is coupled to this rectifier diode 506, and this first charging capacitor 507 is to set up a detecting voltage (not indicating) according to this DC high-voltage power supply DC.Open circuit checking circuit 502 is coupled to this first charging capacitor 507 and this control circuit 1, and this open circuit checking circuit 502 has a critical value, and when this detects voltage greater than this critical value, exports an open-circuit-protection signal S2 and give this control circuit 1.The voltage limiting circuit 503 of lighting a lamp is coupled to this first charging capacitor 507 and this control circuit 1, and this voltage limiting circuit 503 of lighting a lamp is to receive this detecting voltage, and exports an overtension guard signal S3 and give this control circuit 1.
Multiple with reference to figure 2; protective device 5 further comprises an overload checking circuit 504 and a current detector circuit 505; overload checking circuit 504 arrives this control circuit 1 according to the electric current that flows through this cold cathode fluorescent lamp 3 to export an overload protection signal S4, and current detector circuit 505 is to export a power adjustments signal S5 to this control circuit 1 according to the electric current that flows through this cold cathode fluorescent lamp 3.Moreover each output signal (S1, S2, S3, S4, S5) of the short circuit checking circuit 501 in the protective device 5 of the present invention, open circuit checking circuit 502, the voltage limiting circuit 503 of lighting a lamp, overload checking circuit 504 and current detector circuit 505 can see through a photoelectrical coupler (not indicating) or a PCB Copper Foil (not indicating) is sent to this control circuit 1.
Cooperate Fig. 2, please refer to Fig. 3, be the circuit box schematic diagram of second preferred embodiment use of the present invention in cold cathode lamp tube driving system.Compared to first preferred embodiment; in the present invention's second preferred embodiment; protective device 5 further comprises a signal combination circuit 508; signal combination circuit 508 is coupled between this control circuit 1 and this short circuit checking circuit 501 and this open circuit checking circuit 502; this signal combination circuit 508 receives this short-circuit protection signal S1 and open-circuit-protection signal S2, and exports this open circuit/short-circuit protection signal S6 to this control circuit 1.In second preferred embodiment of the present invention, each output signal (S3, S4, S5, S6) of the voltage limiting circuit 503 of lighting a lamp, overload checking circuit 504, current detector circuit 505 and the signal combination circuit 508 of protective device 5 can see through a photoelectrical coupler (not indicating) or a PCB Copper Foil (not indicating) is sent to this control circuit 1.
Cooperate Fig. 3, please refer to Fig. 4, be the detailed circuit schematic of the present invention's second preferred embodiment.In Fig. 4, short circuit checking circuit 501 includes forward diode D1 of a transistor Q1, one second charging capacitor C5, a charging resistor R1 and one first.Wherein transistor Q1 has an emitter-base bandgap grading end, a collector terminal and a base terminal, and this emitter-base bandgap grading end sees through the high-pressure side that this decompression capacitor 509 is coupled to this cold cathode fluorescent lamp 3, and this base terminal is coupled to a reference edge G.The second charging capacitor C5 is coupled to the collector terminal of this reference edge G and this transistor Q1.Charging resistor R1 is coupled to the collector terminal of this supply-voltage source Vcc and this transistor Q1.First forward diode D1 be coupled to the collector terminal of this transistor Q1.
This transistor Q1 in the short circuit checking circuit 501 is by (OFF) when these cold cathode fluorescent lamp 3 short circuits; after transistor Q1 ends (OFF); this supply-voltage source Vcc can see through this charging resistor R1 this second charging capacitor C5 is charged; the voltage of go up setting up up to the second charging capacitor C5 is greater than first forward during the conducting voltage Vp of diode D1, and short circuit checking circuit 501 is promptly exported this short-circuit protection signal S1 to this signal combination circuit 508.
Multiple with reference to figure 4, this open circuit checking circuit 502 comprises one second forward a diode D8 and a zener diode ZD1.Second forward diode D8 be coupled to this first charging capacitor 507, be to receive the detecting voltage of setting up on this first charging capacitor 507.Zener diode ZD1 is coupled to this second diode D8 forward, is in this detecting voltage during greater than the conduction threshold of this zener diode ZD1, and conducting is exported this open-circuit-protection signal S2 and given this signal combination circuit 508.
Multiple with reference to figure 4, this voltage limiting circuit 503 of lighting a lamp comprises forward diode D9 of a voltage divider and the 3rd that is composed in series by first resistance R 5 and one second resistance R 6.Voltage divider is coupled to this first charging capacitor 507, is this detecting voltage of dividing potential drop.The 3rd forward diode D9 be coupled to this first resistance R 5 and be connected in series a little with this second resistance R 6; couple a little voltage greater than the 3rd forward during the conducting voltage of diode D9, this voltage limiting circuit 503 of lighting a lamp is that this overtension guard signal of output S3 gives this control circuit 1.
The composite Fig. 3 that closes, with reference to figure 4, signal combination circuit 508 is coupled by capacitor C12, resistor R 8, R9 and MOS switch Q4 to be formed.Simultaneously, overload checking circuit 504 is coupled by diode D7 and resistor R 4 to be formed, and current detector circuit 505 is coupled with diode D10, D11 by resistor R 7 to be formed.
Please refer to Fig. 5, for the present invention is used in detailed circuit schematic in the multi-lamp system.Protective device 5 of the present invention uses when the system of many fluorescent tubes; each cold cathode fluorescent lamp 3 is to share this first charging capacitor 507, this open circuit checking circuit 502, this voltage limiting circuit 503 of lighting a lamp, this overload checking circuit 504 and this current detector circuit 505; only, each cold cathode fluorescent lamp 3 all need be coupled with a short circuit checking circuit 501, a decompression capacitor 509 and a rectifier diode 506 relatively.Each short circuit checking circuit 501 sees through high-pressure side and this supply-voltage source Vcc that each decompression capacitor 509 is coupled to each cold cathode fluorescent lamp 3 respectively.Each rectifier diode 506 sees through the high-pressure side that each decompression capacitor 509 is coupled to each cold cathode fluorescent lamp 3 respectively.
Cooperate Fig. 2, please refer to Fig. 6, for using the cold cathode lamp tube driving system schematic diagram of protective device 5.The present invention further provides a kind of cold cathode lamp tube driving system that uses above-mentioned protective device 5; this cold cathode lamp tube driving system includes: a protective device 5; one lamp current current equalizer 8; one brightness regulating circuit 6 and an ON/OFF control device 7; this protective device 5 includes some modulating voltage restricting circuits 503; one open circuit checking circuit 502; one short circuit checking circuit 501; an one overload checking circuit 504 and a current detector circuit 505; simultaneously, this cold cathode lamp tube driving system further uses an active electronics stabilizer 2 or one direct current/high-frequency ac transducer (not indicating) to see through a transformer 4 to drive a plurality of cold cathode fluorescent lamp 3 simultaneously.
In above-mentioned, this lamp current current equalizer 8 is two limits that are coupled to this cold cathode fluorescent lamp 3, Yi Bian be inductive component, another side is a capacitive component.This voltage limiting circuit 503 of lighting a lamp is identical with the signal that the detects source of this open circuit checking circuit 502 and short circuit checking circuit 501.The signal that the signal that this overload checking circuit 504 is detected is with this voltage limiting circuit 503 of lighting a lamp is detected mixes, and mixed signal sees through a feedback line (not indicating) and sends this active electronics stabilizer 2 back to.Each cold cathode fluorescent lamp 3 all has independently this voltage limiting circuit 503 of lighting a lamp.
This ON/OFF control device 7 is a transistor or a photoelectrical coupler.This current detector circuit 505 is the electric signals that are used for detecting this cold-cathode tube 3, and this electrical signal will feed back to this active electronics stabilizer 2 through a feedback line (not indicating), use the watt level of regulating load.This overload checking circuit 504 be detect the electric current that flows through load or inspection load terminal voltage or detect the resistance value of load.In above-mentioned, this feedback line consist of a photoelectrical coupler or a PCB Copper Foil.The signal that the signal that this overload checking circuit 504 is detected and this voltage limiting circuit 503 of lighting a lamp are detected is that indivedual feedback lines (not indicating) that see through are sent this active electronics stabilizer 2 back to.
In sum; protective device 5 of the present invention uses when the system of many fluorescent tubes; be the various protections that can reach the multiple cold-cathode fluorescent tube with the most easy circuit; therefore, protective device 5 of the present invention is to improve effectively that the protective circuits that need many groups in the known multiple cold-cathode lamp system are made converter and the cold cathode lamp protection of pipe produces following shortcoming:
1.LCD the manufacturing cost height of panel.
2. the protective circuit design is complicated.
3. the shortcomings such as layout difficulty increase of circuit.
But, the above, only for the detailed description of one the specific embodiment of the best of the present invention with graphic, anyly be familiar with this technical staff in the field of the invention, can think easily and variation or modification all can be encompassed within the following claim scope of the present invention.
Claims (28)
1. a protective device is characterized in that, uses in a cold cathode lamp tube driving system, and in order to protect a control circuit and the cold cathode fluorescent lamp in this cold cathode lamp tube driving system, this protective device comprises:
One short circuit checking circuit, this short circuit checking circuit one end sees through the high-pressure side that a decompression capacitor is coupled to cold cathode fluorescent lamp, this short circuit checking circuit other end is coupled to a supply-voltage source, this short circuit checking circuit receives an ac high voltage source in the high-pressure side of this cold cathode fluorescent lamp, and exports a short-circuit protection signal and give this control circuit when this cold cathode fluorescent lamp is short-circuited;
One rectifier diode sees through the high-pressure side that this decompression capacitor is coupled to this cold cathode fluorescent lamp, and this rectifier diode is this ac high voltage source of rectification, and exports a direct current high voltage source;
One first charging capacitor is coupled to this rectifier diode, and this first charging capacitor is to set up a detecting voltage according to this DC high-voltage power supply;
One open circuit checking circuit is coupled to this first charging capacitor, and this open circuit checking circuit has a critical value, and when this detects voltage greater than this critical value, exports an open-circuit-protection signal and give this control circuit;
And
Some modulating voltage restricting circuits are coupled to this first charging capacitor, and this voltage limiting circuit of lighting a lamp is to receive this detecting voltage, and export an overtension guard signal and give this control circuit.
2. protective device as claimed in claim 1; it is characterized in that; further comprise a signal combination circuit; be coupled between this control circuit, this short circuit checking circuit and this open circuit checking circuit; this signal combination circuit receives this short-circuit protection signal and open-circuit-protection signal, and output open circuit and short-circuit protection signal are to this control circuit.
3. protective device as claimed in claim 2 is characterized in that, this signal combination circuit is through a photoelectrical coupler or a PCB Copper Foil is exported this open circuit and the short-circuit protection signal arrives this control circuit.
4. protective device as claimed in claim 1 is characterized in that, further comprises an overload checking circuit, is to export an overload protection signal to this control circuit according to the electric current that flows through this cold cathode fluorescent lamp.
5. protective device as claimed in claim 4 is characterized in that, this overload checking circuit sees through a photoelectrical coupler or a PCB Copper Foil is exported this overload protection signal to this control circuit.
6. protective device as claimed in claim 4 is characterized in that, further comprises a current detector circuit, is to export a power adjustments signal to this control circuit according to the electric current that flows through this cold cathode fluorescent lamp.
7. protective device as claimed in claim 6 is characterized in that, this current detector circuit is to export this power adjustments signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
8. protective device as claimed in claim 2 is characterized in that, further comprises an overload checking circuit, is to export an overload protection signal to this control circuit according to the electric current that flows through this cold cathode fluorescent lamp.
9. protective device as claimed in claim 8 is characterized in that, this overload checking circuit is to export this overload protection signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
10. protective device as claimed in claim 8 is characterized in that, further comprises a current detector circuit, is to export a power adjustments signal to this control circuit according to the electric current that flows through this cold cathode fluorescent lamp.
11. protective device as claimed in claim 10 is characterized in that, this current detector circuit is to export this power adjustments signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
12. protective device as claimed in claim 1 is characterized in that, this short circuit checking circuit is to export this short-circuit protection signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
13. protective device as claimed in claim 1 is characterized in that, this open circuit checking circuit is to export this open-circuit-protection signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
14. protective device as claimed in claim 1 is characterized in that, this voltage limiting circuit of lighting a lamp is to export this overtension guard signal to this control circuit through a photoelectrical coupler or a PCB Copper Foil.
15. protective device as claimed in claim 1 is characterized in that, this short circuit checking circuit comprises:
One transistor has an emitter-base bandgap grading end, a collector terminal and a base terminal, and this emitter-base bandgap grading end is coupled to the high-pressure side of this cold cathode fluorescent lamp, and this base terminal is coupled to a reference edge;
One second charging capacitor is coupled to this reference edge and this transistorized collector terminal;
One charging resistor is coupled to this supply-voltage source and this transistorized collector terminal; And
One first diode forward is coupled to this transistorized collector terminal;
Wherein, this transistor ends when this cold cathode lamp tube short circuit, and this supply-voltage source sees through this charging resistor to this second charging capacitor charging, and in this first this short-circuit protection signal of output behind the diode current flow forward.
16. protective device as claimed in claim 1 is characterized in that, this open circuit checking circuit comprises:
One second diode forward is coupled to this first charging capacitor, is to receive this detecting voltage; And
One zener diode is coupled to this second diode forward, is in this detecting voltage during greater than the conduction threshold of this zener diode, and this zener diode conducting is given this control circuit to export this open-circuit-protection signal.
17. protective device as claimed in claim 1 is characterized in that, this voltage limiting circuit of lighting a lamp comprises:
One voltage divider is coupled to this first charging capacitor, is this detecting voltage of dividing potential drop, and this voltage divider is to be composed in series by one first resistance and one second resistance; And
One the 3rd diode forward is coupled to this first resistance and this second resistance string contact, and exports this overtension guard signal and give this control circuit.
18. a cold cathode lamp tube driving system that uses the protective device of claim 1 is characterized in that, includes:
Lamp current current equalizer, the voltage limiting circuit of lighting a lamp, open circuit checking circuit, short circuit checking circuit, overload checking circuit, brightness regulating circuit, current detector circuit, switch controlling device, this cold cathode lamp tube driving system are to use active electronics stabilizer or direct current to change the high-frequency ac transducer and see through transformer to drive several cold cathode fluorescent lamp simultaneously.
19. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, this lamp current current equalizer is two limits that are coupled to this cold cathode fluorescent lamp, Yi Bian be inductive component, another side is a capacitive component.
20. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, this voltage limiting circuit of lighting a lamp is identical with the signal that the detects source of this open circuit checking circuit and short circuit checking circuit.
21. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, the signal that this overload checking circuit is detected is to mix with this signal that voltage limiting circuit detected of lighting a lamp, and mixed signal sees through a feedback line and sends this control circuit back to.
22. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, each cold cathode fluorescent lamp all couples with this voltage limiting circuit of lighting a lamp respectively.
23. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, this switch controlling device is a transistor or a photoelectrical coupler.
24. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, this current detector circuit system is used for detecting the electric signal of this cold-cathode tube, and this electrical signal will feed back to control circuit through a feedback line, use the watt level of regulating load.
25. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, the resistance value that this overload checking circuit system detects the electric current that flows through load or detects the terminal voltage of load or detect load.
26. as claim 21 or 24 described cold cathode lamp tube driving systems, it is characterized in that, this feedback line consist of a photoelectrical coupler or a PCB Copper Foil.
27. cold cathode lamp tube driving system as claimed in claim 18, it is characterized in that, the signal that this overload checking circuit is detected sees through a feedback line and sends this control circuit back to, and this signal that voltage limiting circuit detected of lighting a lamp is sent this control circuit back to through another feedback line.
28. cold cathode lamp tube driving system as claimed in claim 18 is characterized in that, this control circuit is an active electronics stabilizer or the high-frequency ac transducer that always circulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100667735A CN101052261B (en) | 2006-04-07 | 2006-04-07 | Protector and cold cathode lamp tube driving system using said protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100667735A CN101052261B (en) | 2006-04-07 | 2006-04-07 | Protector and cold cathode lamp tube driving system using said protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101052261A CN101052261A (en) | 2007-10-10 |
| CN101052261B true CN101052261B (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100667735A Expired - Fee Related CN101052261B (en) | 2006-04-07 | 2006-04-07 | Protector and cold cathode lamp tube driving system using said protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN101052261B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121108U (en) * | 1992-05-07 | 1992-11-04 | 吴杭辉 | Electronic ballast |
| CN2167506Y (en) * | 1993-05-31 | 1994-06-01 | 杨根元 | Electronic ballast for gas discharge lamp with series filtration circuit |
-
2006
- 2006-04-07 CN CN2006100667735A patent/CN101052261B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121108U (en) * | 1992-05-07 | 1992-11-04 | 吴杭辉 | Electronic ballast |
| CN2167506Y (en) * | 1993-05-31 | 1994-06-01 | 杨根元 | Electronic ballast for gas discharge lamp with series filtration circuit |
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| Publication number | Publication date |
|---|---|
| CN101052261A (en) | 2007-10-10 |
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Granted publication date: 20101222 Termination date: 20110407 |