CN201657477U - Dimming drive circuit of cold-cathode fluorescent lamp - Google Patents
Dimming drive circuit of cold-cathode fluorescent lamp Download PDFInfo
- Publication number
- CN201657477U CN201657477U CN2010203008182U CN201020300818U CN201657477U CN 201657477 U CN201657477 U CN 201657477U CN 2010203008182 U CN2010203008182 U CN 2010203008182U CN 201020300818 U CN201020300818 U CN 201020300818U CN 201657477 U CN201657477 U CN 201657477U
- Authority
- CN
- China
- Prior art keywords
- circuit
- npn triode
- links
- electric capacity
- emitter
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model relates to a dimming cold-cathode fluorescent lamp having simple structure and better stability and suitable for the continuous adjustment of the brightness, which comprises a dimming drive circuit, the dimming drive circuit comprises a light modulator, a rectification circuit, a high-frequency inverter circuit, a booster circuit and a dimming circuit, the light modulator is connect with an AC power supply, the AC output terminal of the light modulator is connected with the AC input terminal of the rectification circuit, the DC output terminal of the rectification circuit is connected with the DC input terminal of the high-frequency inverter circuit, the high-frequency AC output terminal of the high-frequency inverter circuit is connected with the booster control terminal of the booster circuit, the power supply output terminal of the booster circuit is used for being connected with the power supply input terminal of the cold-cathode lamp, the DC output terminal of the rectification circuit is connected with the power supply input terminal of the dimming circuit, the feedback voltage output terminal of the booster circuit is connected with the feedback voltage input terminal of the dimming circuit, the dimming control output terminal of the dimming circuit is connected with the inverter frequency control terminal of the high-frequency inverter circuit.
Description
Technical field
The utility model relates to a kind of light modulation drive circuit of cold-cathode fluorescence lamp.
Background technology
Chinese patent application numbers 200310109366.4 discloses a kind of spiral type cold-cathode fluorescence lamp, comprises cell-shell, fluorescent tube, tube cathode, seal wire, driver and shell thereof, lamp holder and line.
Above-mentioned the deficiencies in the prior art part is: above-mentioned cold cathode lamp can only keep a brightness when using, and can not carry out brightness and regulate continuously, can not satisfy corresponding instructions for use and further purpose of energy saving.
The utility model content
The technical problems to be solved in the utility model provide a kind of simple in structure, be suitable for that brightness is regulated continuously, the stability light modulation drive circuit of cold-cathode fluorescence lamp preferably.
In order to solve the problems of the technologies described above, the utility model provides a kind of light modulation drive circuit of cold-cathode fluorescence lamp, comprising: the light modulation drive circuit; This light modulation drive circuit comprises: dimmer, rectification circuit, high-frequency inverter circuit, booster circuit and light adjusting circuit; The ac input end of dimmer links to each other with AC power, the ac output end of dimmer links to each other with the ac input end of rectification circuit, the dc output end of rectification circuit links to each other with the direct-flow input end of high-frequency inverter circuit, the high-frequency alternating current output of high-frequency inverter circuit links to each other with the control end that boosts of booster circuit, and the power output end of booster circuit is used for linking to each other with the power input of cold cathode lamp; The dc output end of rectification circuit links to each other with the power input of light adjusting circuit, the feedback voltage output of booster circuit links to each other with the feedback voltage input of light adjusting circuit, and the brightness adjustment control output of light adjusting circuit links to each other with the reverse frequency control end of high-frequency inverter circuit.
During work, the output voltage of high-frequency inverter circuit output high-frequency ac electric control booster circuit, and the driving cold cathode lamp is lighted; Booster circuit output feedback voltage is to light adjusting circuit, and light adjusting circuit is according to the frequency of the high-frequency alternating current of described feedback voltage control high-frequency inverter circuit output, so that the output voltage of booster circuit remains in the preset range, and then control cold cathode lamp brightness stability.
During light modulation, by regulating the waveform that dimmer changes the alternating voltage of input rectification circuit, and then change the waveform width size of the unidirectional Rectified alternating current of described rectification circuit output, light adjusting circuit is according to the height of the frequency of the high-frequency alternating current of the waveform width size control high-frequency inverter circuit output of described unidirectional Rectified alternating current, with the size of output voltage of control booster circuit, with the brightness power of final adjustment cold cathode lamp.
Technique scheme of the present utility model has the following advantages compared to existing technology: (1) light adjusting circuit: by at the external controllable silicon dimmer of input, regulate the waveform that dimmer changes input voltage, output by the corresponding adjustment high-frequency inverter circuit of light adjusting circuit, thereby change the supply power voltage of fluorescent tube, realize the purpose of light modulation.(2) negative electrode in the fluorescent tube is placed in the top of glass tube, the lower end of glass tube and sealing-in place of fluorescent tube are weldingly connected, thereby the heat energy of the negative electrode of the condition of high temperature conducts on the light through glass tube in the time of will working, with the temperature of control cathode and electrode cable junction, prevent that the phenomenon of blackout from appearring in the fluorescent tube at this place.Be provided with liquid mercury in the glass tube, can guarantee heat-conducting effect.(3) lamp luminescence principle: add required high-frequency and high-voltage by giving between the two end electrodes of fluorescent tube,, cause discharge with gas breakdown ionization in the fluorescent tube.At this moment, the ionization that is excited of a large amount of mercury atoms produces the 253.7nm ultraviolet ray, and the high frequency fluorescent material on the tube wall is subjected to ultraviolet radiation and sends visible light.Glass tube in the utility model fluorescent tube is as protective cover, and glass stem is that glass tube and electrode play the support effect, with the convenient electrode of placing; (4) but electrode of the present utility model adopts pure aluminum tube or oxygen-free copper pipe or valve pipe, its working temperature is lower than conventional fluorescent lamps, thus anti-especially flicker impact, but frequent starting, cold and hot cataclysm influence is less, oxidation is less, can guarantee that fluorescent tube has long useful life; And adopt the fluorescent tube of this electrode, cooperate light adjusting circuit of the present utility model to use, double-helical fluorescent tube can a circle one be punctuated bright and is not glimmered when light modulation, and dimming behavior is better.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the contour structures schematic diagram of the light modulation drive circuit of the cold-cathode fluorescence lamp among the embodiment;
Fig. 2 is the circuit theory diagrams of light modulation drive circuit of the light modulation drive circuit of cold-cathode fluorescence lamp among the embodiment;
Fig. 3 is the circuit block diagram of above-mentioned light modulation drive circuit.
Embodiment
(embodiment 1)
See Fig. 1-3, the cold-cathode fluorescence lamp of present embodiment comprises: lamp holder a, fluorescent tube b and be located at lamp holder a and fluorescent tube b between connection housing c, connect in the housing c and be provided with the light modulation drive circuit.The cylindrical double helix of the main body of cold cathode fluorescent lamp of the present utility model, in order to protect cold cathode fluorescent lamp, fluorescent tube b is provided with cell-shell d.
Described light modulation drive circuit comprises: dimmer 1, rectification circuit 2, high-frequency inverter circuit 3, booster circuit 4 and light adjusting circuit 6; The ac input end of dimmer 1 links to each other with AC power AC, the ac output end of dimmer 1 links to each other with the ac input end of rectification circuit 2, the dc output end of rectification circuit 2 links to each other with the direct-flow input end (i.e. the anode of the 5th diode D5) of high-frequency inverter circuit 3, the high-frequency alternating current output of high-frequency inverter circuit 3 (i.e. the contact of the 5th inductance L 5 and primary coil N1) links to each other with the control end that boosts (being primary coil N1) of booster circuit 4, and the power output end of booster circuit 4 (being secondary coil N3) links to each other with the power input of cold cathode lamp 5; The dc output end of rectification circuit 2 links to each other with the power input (i.e. the collector electrode of the 3rd NPN triode Q3) of light adjusting circuit 6, the feedback voltage output of booster circuit 4 (being the contact of Voltage Feedback coil N2 the tenth diode D10) links to each other with the feedback voltage input (i.e. the emitter of the 3rd NPN triode Q3) of light adjusting circuit 6, and the brightness adjustment control output of light adjusting circuit 6 (i.e. the collector electrode of the 2nd NPN triode Q2) links to each other with the reverse frequency control end (being the collector electrode of PNP triode Q4) of high-frequency inverter circuit 3; Described dimmer 1 is a controllable silicon dimmer.
During work, the output voltage of high-frequency inverter circuit 3 output high-frequency ac electric control booster circuits 4, and driving cold cathode lamp 5 is lighted; Booster circuit 4 output feedback voltages are to light adjusting circuit 6, light adjusting circuit 6 is according to the frequency of the high-frequency alternating current of described feedback voltage control high-frequency inverter circuit 3 outputs, so that the output voltage of booster circuit 4 remains in the preset range, and then control cold cathode lamp 5 brightness stabilities.
During light modulation, by regulating the waveform that dimmer 1 changes the alternating voltage of input rectification circuit 2, and then change the waveform width size of the unidirectional Rectified alternating current of described rectification circuit 2 outputs, light adjusting circuit 6 is according to the height of the frequency of the high-frequency alternating current of waveform width size control high-frequency inverter circuit 3 outputs of described unidirectional Rectified alternating current, with the size of output voltage of control booster circuit 4, with the brightness power of final adjustment cold cathode lamp 5.
Described light adjusting circuit 6 comprises: electrochemical capacitor C9, the 2nd NPN triode Q2 and the 3rd NPN triode Q3; Be provided with voltage-stabiliser tube D11 between the base stage of the 3rd NPN triode Q3 and the emitter, be provided with the 6th resistance R 6 and the 6th diode D6 between the base stage of the base stage of the 2nd NPN triode Q2 and the 3rd NPN triode Q3.
The base stage of the 3rd NPN triode Q3 links to each other with the dc output end of rectification circuit 2 with the 3rd resistance R 3 through first resistance R 1 respectively with collector electrode, and the emitter of the 3rd NPN triode Q3 connects the positive pole of electrochemical capacitor C9; The positive pole of electrochemical capacitor C9 is connected in series the base stage that meets the 2nd NPN triode Q2 after the 7th resistance R 7, the emitter of the 2nd NPN triode Q2 and the negative pole of electrochemical capacitor C9 connect the direct-flow input end of rectification circuit 2, and the collector electrode of the 2nd NPN triode Q2 links to each other with the reverse frequency control end of described high-frequency inverter circuit 3; The feedback voltage output of booster circuit 4 connects the positive pole of electrochemical capacitor C9 through the tenth diode D10.
During work, when the feedback voltage absolute presupposition value of booster circuit 4 outputs is higher or on the low side, the emitter output current of the 3rd NPN triode Q3 diminishes or becomes big, make that the base current of the 2nd NPN triode Q2 is corresponding to diminish or become big, thereby the output current of reverse frequency control end of controlling described high-frequency inverter circuit 3 is corresponding to diminish or becomes big, and then the corresponding step-down of the frequency of the high-frequency alternating current of control high-frequency inverter circuit 3 output or uprise, and make described feedback voltage be stable at described preset value, make cold cathode lamp 5 keep brightness stability.
During light modulation, the base current of controlling the 3rd NPN triode Q3 by the waveform width that reduces or increase described unidirectional Rectified alternating current diminishes or becomes big, and then the base current of controlling the 2nd NPN triode Q2 diminishes or becomes big, thereby reduce or increase the output current of the reverse frequency control end of described high-frequency inverter circuit 3, and then reduce or improve the frequency of the high-frequency alternating current of described high-frequency inverter circuit 3 outputs, with dying down or grow of control cold cathode lamp 5 brightness.
Described booster circuit 4 comprises step-up transformer TR and series parallel resonance circuit; Step-up transformer TR comprises: primary coil N1, Voltage Feedback coil N2 and the secondary coil N3 in parallel with cold cathode lamp 5.
The series parallel resonance circuit comprises: Chuan Lian the 3rd inductance L 3, first inductance L 1, the 5th inductance L 5, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7 and series circuit the 4th capacitor C 4 in parallel that constitutes with the 3rd inductance L 3 and first inductance L 1 successively; First inductance L 1 and the 5th inductance L 5 be magnetic core altogether; The 5th capacitor C 5 is in parallel with described primary coil N1.
Described high-frequency inverter circuit 3 comprises: a NPN triode Q1 and PNP triode Q4.
The dc output end of described rectification circuit 2 is connected with the 5th diode D5, the negative electrode of the 5th diode D5 is connected in series the collector electrode that meets a NPN triode Q1 after second inductance L 2, be provided with second resistance R 2 between the collector electrode of the one NPN triode Q1 and the base stage, the emitter of the one NPN triode Q1 links to each other with the contact of the 4th capacitor C 4 and first inductance L 1, and the emitter of a NPN triode Q1 also links to each other with the emitter of PNP triode Q4; The collector electrode of PNP triode Q4 links to each other with the collector electrode of described the 2nd NPN triode Q2.
The 5th diode D5 is used to cut off the resonance potential of described series parallel resonance circuit, to guarantee the stability of the unidirectional Rectified alternating current that rectification circuit 2 is exported.
One end of the 7th capacitor C 7 is connected in series the negative electrode that meets described the 5th diode D5 after the 8th capacitor C 8, and the other end of the 7th capacitor C 7 is connected in series the collector electrode that meets a described NPN triode Q1 after the 6th capacitor C 6.
Be provided with serial connection the 8th resistance R 8 between the base stage of PNP triode Q4 and the collector electrode, be provided with between the collector and emitter of PNP triode Q4: the 8th diode D8 and the RC filter circuit that constitutes by the 3rd capacitor C 3 and the 5th resistance R 5.
Be provided with the 7th diode D7 between the emitter of the 3rd NPN triode Q3 and the negative electrode of the 5th diode D5; The collector electrode of the 2nd NPN triode Q2 also links to each other with the contact of the 7th capacitor C 7 and the 8th capacitor C 8; The emitter of the one NPN triode Q1 and collector electrode are connected anode and the negative electrode of the 9th diode D9 respectively; The base stage of the one NPN triode Q1 and PNP triode Q4 is connected in series an end that connects the tenth resistance R 10 after first capacitor C 1 and second capacitor C 2, another termination the 4th capacitor C 4 of the tenth resistance R 10 and the contact of the 3rd inductance L 3 respectively; Be provided with the 9th resistance R 9 between the collector and emitter of the 2nd NPN triode Q2.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (5)
1. the light modulation drive circuit of a cold-cathode fluorescence lamp is characterized in that comprising: the light modulation drive circuit; This light modulation drive circuit comprises: dimmer (1), rectification circuit (2), high-frequency inverter circuit (3), booster circuit (4) and light adjusting circuit (6); The ac input end of dimmer (1) links to each other with AC power (AC), the ac output end of dimmer (1) links to each other with the ac input end of rectification circuit (2), the dc output end of rectification circuit (2) links to each other with the direct-flow input end of high-frequency inverter circuit (3), the high-frequency alternating current output of high-frequency inverter circuit (3) links to each other with the control end that boosts of booster circuit (4), and the power output end of booster circuit (4) is used for linking to each other with the power input of cold cathode lamp (5); The dc output end of rectification circuit (2) links to each other with the power input of light adjusting circuit (6), the feedback voltage output of booster circuit (4) links to each other with the feedback voltage input of light adjusting circuit (6), and the brightness adjustment control output of light adjusting circuit (6) links to each other with the reverse frequency control end of high-frequency inverter circuit (3).
2. the light modulation drive circuit of cold-cathode fluorescence lamp according to claim 1, it is characterized in that: described light adjusting circuit (6) comprising: electrochemical capacitor (C9), the 2nd NPN triode (Q2) and the 3rd NPN triode (Q3);
Be provided with voltage-stabiliser tube (D11) between the base stage of the 3rd NPN triode (Q3) and the emitter, be provided with the 6th resistance (R6) and the 6th diode (D6) between the base stage of the base stage of the 2nd NPN triode (Q2) and the 3rd NPN triode (Q3);
The base stage of the 3rd NPN triode (Q3) links to each other with the dc output end of the 3rd resistance (R3) with rectification circuit (2) through first resistance (R1) respectively with collector electrode, and the emitter of the 3rd NPN triode (Q3) connects the positive pole of electrochemical capacitor (C9); The positive pole of electrochemical capacitor (C9) is connected in series the base stage that connects the 2nd NPN triode (Q2) behind the 7th resistance (R7), the negative pole of the emitter of the 2nd NPN triode (Q2) and electrochemical capacitor (C9) connects the direct-flow input end of rectification circuit (2), and the collector electrode of the 2nd NPN triode (Q2) links to each other with the reverse frequency control end of described high-frequency inverter circuit (3); The feedback voltage output of booster circuit (4) connects the positive pole of electrochemical capacitor (C9) through the tenth diode (D10).
3. the light modulation drive circuit of cold-cathode fluorescence lamp according to claim 2 is characterized in that:
Described booster circuit (4) comprises step-up transformer (TR) and series parallel resonance circuit;
Step-up transformer (TR) comprising: primary coil (N1), Voltage Feedback coil (N2) and the secondary coil (N3) in parallel with cold cathode lamp (5);
The series parallel resonance circuit comprises: Chuan Lian the 3rd inductance (L3), first inductance (L1), the 5th inductance (L5), the 5th electric capacity (C5), the 6th electric capacity (C6), the 7th electric capacity (C7) and series circuit the 4th electric capacity (C4) in parallel that constitutes with the 3rd inductance (L3) and first inductance (L1) successively; First inductance (L1) and the 5th inductance (L5) be magnetic core altogether; The 5th electric capacity (C5) is in parallel with described primary coil (N1);
Described high-frequency inverter circuit (3) comprising: a NPN triode (Q1) and PNP triode (Q4);
The dc output end of described rectification circuit (2) is connected with the 5th diode (D5), the negative electrode of the 5th diode (D5) is connected in series the collector electrode that connects a NPN triode (Q1) behind second inductance (L2), be provided with second resistance (R2) between the collector electrode of the one NPN triode (Q1) and the base stage, the emitter of the one NPN triode (Q1) links to each other with the contact of the 4th electric capacity (C4) with first inductance (L1), and the emitter of a NPN triode (Q1) also links to each other with the emitter of PNP triode (Q4); The collector electrode of PNP triode (Q4) links to each other with the collector electrode of described the 2nd NPN triode (Q2);
One end of the 7th electric capacity (C7) is connected in series the negative electrode that connects described the 5th diode (D5) behind the 8th electric capacity (C8), and the other end of the 7th electric capacity (C7) is connected in series the collector electrode that connects a described NPN triode (Q1) behind the 6th electric capacity (C6).
4. the light modulation drive circuit of cold-cathode fluorescence lamp according to claim 3 is characterized in that:
Be provided with serial connection the 8th resistance (R8) between the base stage of PNP triode (Q4) and the collector electrode, be provided with between the collector and emitter of PNP triode (Q4): the 8th diode (D8) and the RC filter circuit that constitutes by the 3rd electric capacity (C3) and the 5th resistance (R5);
Be provided with the 7th diode (D7) between the negative electrode of the emitter of the 3rd NPN triode (Q3) and the 5th diode (D5);
The collector electrode of the 2nd NPN triode (Q2) also links to each other with the contact of the 7th electric capacity (C7) with the 8th electric capacity (C8); The emitter of the one NPN triode (Q1) and collector electrode are connected the anode and the negative electrode of the 9th diode (D9) respectively; The base stage of the one NPN triode (Q1) and PNP triode (Q4) is connected in series an end that connects the tenth resistance (R10) behind first electric capacity (C1) and second electric capacity (C2) respectively, another termination the 4th electric capacity (C4) of the tenth resistance (R10) and the contact of the 3rd inductance (L3); Be provided with the 9th resistance (R9) between the collector and emitter of the 2nd NPN triode (Q2).
5. according to the light modulation drive circuit of one of claim 1-4 described cold-cathode fluorescence lamp, it is characterized in that: described dimmer (1) is a controllable silicon dimmer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203008182U CN201657477U (en) | 2010-01-15 | 2010-01-15 | Dimming drive circuit of cold-cathode fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203008182U CN201657477U (en) | 2010-01-15 | 2010-01-15 | Dimming drive circuit of cold-cathode fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201657477U true CN201657477U (en) | 2010-11-24 |
Family
ID=43122704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010203008182U Expired - Fee Related CN201657477U (en) | 2010-01-15 | 2010-01-15 | Dimming drive circuit of cold-cathode fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201657477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470169A (en) * | 2014-12-31 | 2015-03-25 | 深圳市华星光电技术有限公司 | Ultraviolet ray fluorescent lamp assembly and alignment ultraviolet ray irradiation device |
-
2010
- 2010-01-15 CN CN2010203008182U patent/CN201657477U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470169A (en) * | 2014-12-31 | 2015-03-25 | 深圳市华星光电技术有限公司 | Ultraviolet ray fluorescent lamp assembly and alignment ultraviolet ray irradiation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201672328U (en) | LED fluorescent lamp | |
| CN101742804B (en) | Cold-cathode fluorescence lamp capable of regulating luminance | |
| CN101600287B (en) | Automatic control method of the output power of gas discharge lamp and electronic ballast | |
| CN201657477U (en) | Dimming drive circuit of cold-cathode fluorescent lamp | |
| CN202231933U (en) | Brightness adjustable electronic ballast | |
| CN102149245A (en) | Electronic ballast of efficient and light-adjustable gas discharge lamp | |
| CN201854490U (en) | External adjustable electronic stabilizer | |
| CN204652758U (en) | A kind of can the cold cathode lighting lamp circuit of level and smooth light modulation | |
| CN203151849U (en) | Energy-saving electronic ballast and light fixture | |
| CN207251464U (en) | Anti- overshoot circuit with the damping of wide output area | |
| CN201051193Y (en) | Power circuit of backlight display system | |
| CN202374551U (en) | Dimmable CCFL liquid crystal lamp bulb | |
| CN102065622B (en) | Isolation electrodeless lamp | |
| CN201550342U (en) | High-frequency energy saving lamp circuit | |
| CN201398262Y (en) | Drive circuit of low-voltage alternating current fluorescent lamp | |
| CN201450656U (en) | Circuit of cold cathode fluorescent energy-saving lamp | |
| CN202444684U (en) | Metal halide lamp electronic ballast | |
| CN201869426U (en) | Isolated electrodeless lamp | |
| Wang et al. | Realization of a high-efficiency T5 ballast with multi-dimming mechanisms based on lamp arc modeling | |
| CN103037602A (en) | Electronic ballast with adjustable luminance | |
| CN102892246B (en) | Discharge lamp system and control method thereof | |
| CN212367574U (en) | Control circuit of LED dimming system | |
| CN101932181B (en) | Cold cathode fluorescent energy-saving lamp circuit | |
| CN201207749Y (en) | EEFL electric power having protection | |
| CN201114959Y (en) | Light adjustable fluorescent lamp device used together with phase adjuster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130115 |