CN201015239Y - Lighting tube power source supply circuit and its transformer - Google Patents
Lighting tube power source supply circuit and its transformer Download PDFInfo
- Publication number
- CN201015239Y CN201015239Y CNU2007200016518U CN200720001651U CN201015239Y CN 201015239 Y CN201015239 Y CN 201015239Y CN U2007200016518 U CNU2007200016518 U CN U2007200016518U CN 200720001651 U CN200720001651 U CN 200720001651U CN 201015239 Y CN201015239 Y CN 201015239Y
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- coil
- fluorescent tube
- transformer
- magnetic core
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Abstract
The utility model discloses a lamp tube power supply circuit and the transformer of the lamp tube power supply circuit. The lamp tube power supply circuit comprises a driving circuit, a first lamp tube, a second lamp tube and a transformer. The driving circuit is used for putting out the alternating voltage, and the transformer is used for receiving the alternating voltage and driving the first and the second lamp tube. The transformer comprises a magnetic core, a one-time lateral winding set, a two time lateral coil, a first and a second coil, which are provided with almost the same winding number. The one-time lateral winding set, the two time lateral coil, the first and the second coil are wound around the magnetic core, and the one-time lateral winding set is coupled with the driving circuit, for receiving the alternating voltage. An end of a first and a second lamp tube is coupled with the two time lateral coil, while the other end of the first and the second lamp tube are respectively coupled with the first and the second coil.
Description
Technical field
The utility model relates to a kind of fluorescent tube power supply circuit and transformer thereof, and particularly relevant for a kind of fluorescent tube power supply circuit and transformer thereof of balance multi-light tube current.
Background technology
Along with the size of LCD constantly increases, the required brightness that provides of its backlight module also must increase thereupon, just can keep the image quality of picture.For improve the luminosity of backlight module, just must can reach required brightness by using many fluorescent tubes.Drive the many costs that fluorescent tube is required in order to reduce, the optimal practice is to utilize a transformer to drive many fluorescent tubes simultaneously.
Yet the impedance operator of each fluorescent tube is also inequality, and therefore, if no suitable circuit design, the electric current that different fluorescent tube is flowed through is with inconsistent.Thus, not only will cause every fluorescent tube luminosity difference to each other, also will seriously influence the useful life of each fluorescent tube.So how effectively equiulbrium flow is the problem of industry urgent need solution now through each lamp tube current.
The utility model content
The purpose of this utility model is to provide a kind of fluorescent tube power supply circuit and transformer thereof of balance multi-light tube current, the coil that transformer has a plurality of identical coiling numbers and magnetic circuit is coupled to each fluorescent tube, the electric current that makes each fluorescent tube flow through reaches unanimity, thus, not only every fluorescent tube luminosity to each other also reaches unanimity, and also will increase the useful life of each fluorescent tube thereupon.
The purpose of this utility model is achieved in that and promptly proposes a kind of fluorescent tube power supply circuit.Fluorescent tube power supply circuit comprises drive circuit, first fluorescent tube, second fluorescent tube and transformer.Drive circuit is in order to export an alternating voltage.Transformer is in order to receive alternating voltage and to drive first fluorescent tube and second fluorescent tube according to this.
Transformer comprises magnetic core, primary side coiling group, second siding ring, first coil with roughly the same coiling number and second coil.Primary side coiling group, second siding ring, first coil and second coil all curl up on magnetic core, primary side coiling group be coupled to drive circuit with receive alternating voltage and.One end of first fluorescent tube and an end of second fluorescent tube all are coupled to second siding ring, and the other end of the other end of first fluorescent tube and second fluorescent tube is coupled to first coil and second coil respectively.
According to the utility model, a kind of transformer is proposed also.Transformer comprises magnetic core, primary side coiling group, second siding ring, first coil with identical coiling number and second coil.Primary side coiling group, second siding ring, first coil and second coil all curl up on magnetic core, and primary side coiling group is coupled to drive circuit to receive alternating voltage.One end of first fluorescent tube and an end of second fluorescent tube all are coupled to second siding ring, and the other end of the other end of first fluorescent tube and second fluorescent tube is coupled to first coil and second coil respectively.
Advantage of the present utility model is, its fluorescent tube power supply circuit and transformer thereof, be that primary side coiling group, second siding ring and the identical a plurality of coils of coiling number are curled up on same magnetic core, because a plurality of coils all have identical coiling number and magnetic flux, therefore, the electric current that each fluorescent tube is flowed through will reach unanimity, and make every fluorescent tube luminosity to each other also reach unanimity, and then improve the useful life of each fluorescent tube.
For foregoing of the present utility model can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 is the circuit diagram according to a kind of fluorescent tube power supply circuit of the utility model one preferred embodiment;
Fig. 2 is the schematic diagram of first kind of transformer;
Fig. 3 is the part schematic diagram of second kind of transformer;
Fig. 4 is the schematic diagram of second kind of transformer;
Fig. 5 to Figure 24 is the schematic diagram of the various coiling modes of second kind of transformer.
The main element symbol description
10: fluorescent tube power supply circuit
110: drive circuit
120,220,320: transformer
122,222: magnetic core
224,324: drum stand
224 (1), 224 (2), 224 (3), 324 (1), 324 (2), 324 (3): the winding section
326 (1), 326 (2), 326 (3): portion of terminal
328: dividing plate
3260: terminal
C1, C2: coil
P: primary side coiling group
S: second siding ring
L1, L2: fluorescent tube
Embodiment
Please refer to Fig. 1, it illustrates is circuit diagram according to a kind of fluorescent tube power supply circuit of the utility model one preferred embodiment.For convenience of description, the described fluorescent tube of following embodiment system is the example explanation with fluorescent tube L1 and fluorescent tube L2, and coil is to be the example explanation with coil C1 and coil C2.Yet do not limit to claim of the present utility model, the utility model also can be used more multi-thread circle and couple with more fluorescent tubes, makes each lamp tube current reach unanimity, and then increases the useful life of fluorescent tube.
Fluorescent tube power supply circuit 10 comprises drive circuit 110, fluorescent tube L1, fluorescent tube L2 and transformer 120.Drive circuit 110 is in order to output AC voltage AC.Transformer 120 is in order to receive alternating voltage AC and to drive fluorescent tube L1 and fluorescent tube L2 according to this respectively.Fluorescent tube L1 and fluorescent tube L2 for example are discharge lamp, as the cold cathode fluorescent lamp pipe (Cold Cathode Fluorescent Lamp, CCFL) or the outer electrode fluorescent lamp (External Electrode Fluorescent Lamp, EEFL).
The magnetic core 122 of following embodiment is not limited to any form, for example can be made up of two U font magnetic cores, also can be made up of two E font magnetic cores, or be made up of a U type magnetic core and an I type magnetic core.
Primary side coiling group P is made of single coil or a plurality of coil, and coil C1 is adjacent with coil C2.Coil C1 and coil C2 are altogether around mode or be wound in magnetic core 122 around mode (or be called and around mode) altogether with non-.When coil C1 and coil C2 with altogether when mode is wound in magnetic core 122, not only improve the current balance type effect, will make that more the coiling of coil C1 and coil C2 is more easy.
Primary side coiling group P is coupled to drive circuit 110 to receive alternating voltage AC, after by second siding ring S alternating voltage AC being boosted, exports fluorescent tube L1 and fluorescent tube L2 respectively to.The end of fluorescent tube L1 and fluorescent tube L2 all is coupled to second siding ring S, and the other end of fluorescent tube L1 and fluorescent tube L2 is coupled to coil C1 and coil C2 respectively, and the coiling number of coil C1 and coil C2 is identical in fact.
Because the coiling number of coil C1 and coil C2 is identical in fact, and coil C1 and coil C2 connect and curl up on magnetic core 122, and therefore, coil C1 and coil C2 have identical magnetic flux, and the electric current that makes fluorescent tube L1 and fluorescent tube L2 be flowed through reaches unanimity.Thus, the luminosity of fluorescent tube L1 and fluorescent tube L2 also reaches unanimity, and has also improved the useful life of fluorescent tube L1 and fluorescent tube L2 simultaneously.
First kind of transformer
Please refer to Fig. 2, what it illustrated is the schematic diagram of first kind of transformer.Transformer 220 comprises magnetic core 222, drum stand 224, primary side coiling group P, second siding ring S, coil C1 and coil C2, and drum stand 224 coats to small part magnetic core 222, to curl up primary side coiling group P, second siding ring S, coil C1 and coil C2.
Second kind of transformer
Please be simultaneously with reference to Fig. 3 and 4, Fig. 3 is the part schematic diagram of second kind of transformer, and Fig. 4 is the schematic diagram of second kind of transformer.Transformer 320 comprises magnetic core (not illustrating), drum stand 324, primary side coiling group P, second siding ring S, coil C1 and coil C2 at least, and drum stand 324 coating magnetic cores, to curl up primary side coiling group P, second siding ring S, coil C1 and coil C2.
Transformer 320 more comprises portion of terminal 326 (1), portion of terminal 326 (2), portion of terminal 326 (3) and dividing plate 328.Portion of terminal 326 (1) and portion of terminal 326 (2) are disposed at the two ends of drum stand 324 respectively, and portion of terminal 326 (1), portion of terminal 326 (2) and portion of terminal 326 (3) have terminal 3260, to be electrically connected the two ends of primary side coiling group P, second siding ring S, coil C1 and coil C2.Portion of terminal 326 (3) itself has the isolation features of dividing plate 328.
The various coiling modes of transformer
The two ends of primary side coiling group P, second siding ring S, coil C1 and the coil C2 of above-mentioned transformer 320 can be different the coiling mode be electrically connected with terminal 3260.For convenience of description, following content is the example explanation with the various coiling modes of transformer 320 with Fig. 5 to Figure 24, and Fig. 5 to Figure 24 is respectively the schematic diagram of the various coiling modes of second kind of transformer.Yet do not limit to desired protection of the present utility model, the utility model also can be electrically connected with terminal 3260 by other coiling modes.
For instance, in Fig. 5 to Fig. 16, the terminal 3260 of portion of terminal 326 (1) is in order to the two ends of electrical connection coil C1 and coil C2, and the terminal 3260 of portion of terminal 326 (2) is in order to be electrically connected the two ends of second siding ring S.The two ends of primary side coiling group P optionally are electrically connected on the terminal 3260 of single portion of terminal 326 (3), or are electrically connected on the terminal 3260 of two portion of terminal 326 (3) respectively.
In addition, the set-up mode that dividing plate 328 also can be different is disposed in the transformer 320.For instance, dividing plate 328 is configurable between two portion of terminal 326 (3), or is disposed between primary side coiling group P and the second siding ring S, also or be disposed at coil C1 and coil C2 and between primary side coiling group P.
In the 17th to 24 figure, be with aforementioned difference: the terminal 3260 of portion of terminal 326 (2) also can only be electrically connected the end of second siding ring S.The other end of second siding ring S can be electrically connected the terminal 3260 of another terminal portion 326 (3).
Disclosed fluorescent tube power supply circuit of the utility model the foregoing description and transformer thereof are that primary side coiling group, second siding ring and the identical a plurality of coils of coiling number are curled up on same magnetic core.Because a plurality of coils all have identical coiling number and magnetic flux, therefore, the electric current that each fluorescent tube is flowed through will reach unanimity, and make every fluorescent tube luminosity to each other also reach unanimity, and then improve the useful life of each fluorescent tube.
In sum, though disclosed the utility model in conjunction with an above preferred embodiment, it is not in order to limit the utility model.Have in the technical field under the utility model and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection range of the present utility model should with enclose claim was defined is as the criterion.
Claims (12)
1. fluorescent tube power supply circuit, comprising: one in order to export the drive circuit of an alternating voltage; One first fluorescent tube and one second fluorescent tube; And a transformer, in order to receive this alternating voltage and to drive this first fluorescent tube and this second fluorescent tube according to this, it is characterized in that this transformer comprises: a magnetic core; One primary side coiling group is curled up on this magnetic core, is coupled to this drive circuit to receive this alternating voltage; One second siding ring curls up on this magnetic core, and an end of this first fluorescent tube and an end of this second fluorescent tube all are coupled to this second siding ring; And one first coil and one second coil, all curling up on this magnetic core, the other end of the other end of this first fluorescent tube and this second fluorescent tube is coupled to this first coil and this second coil respectively, and the coiling number of this first coil and this second coil is identical in fact.
2. fluorescent tube power supply circuit as claimed in claim 1 is characterized in that, this first fluorescent tube and this second fluorescent tube are discharge lamp.
3. fluorescent tube power supply circuit as claimed in claim 1 is characterized in that, this first fluorescent tube and this second fluorescent tube are cold cathode fluorescent lamp.
4. fluorescent tube power supply circuit as claimed in claim 1 is characterized in that, this primary side coiling group is made of single coil or a plurality of coil.
5. fluorescent tube power supply circuit as claimed in claim 1 is characterized in that, this first coil and this second coil are adjacent, and this primary side coiling group is between this second siding ring and this first coil and this second coil.
6. fluorescent tube power supply circuit as claimed in claim 1 is characterized in that, this first coil and this second coil are to be wound in this magnetic core around mode altogether.
7. a transformer is used to drive one first fluorescent tube and one second fluorescent tube, it is characterized in that this transformer comprises: a magnetic core; One primary side coiling group is curled up on this magnetic core and is received an alternating voltage; One second siding ring curls up on this magnetic core, in order to drive this first fluorescent tube and this second fluorescent tube; And one first coil and one second coil, all curling up on this magnetic core, and have identical in fact coiling number, this first coil and this second siding ring and this first fluorescent tube couple, and this second coil and this second siding ring and this second fluorescent tube couple.
8. transformer as claimed in claim 7 is characterized in that, this primary side coiling group is made of single coil or a plurality of coil.
9. transformer as claimed in claim 7 is characterized in that, this first coil and this second coil are adjacent, and this primary side coiling group is between this second siding ring and this first coil and this second coil.
10. transformer as claimed in claim 7 is characterized in that, this first coil and this second coil are to be wound in this magnetic core around mode altogether.
11. a transformer is characterized in that, this transformer comprises: a magnetic core; One primary side coiling group is curled up on this magnetic core; One second siding ring curls up on this magnetic core; And one first coil and one second coil, all curl up on this magnetic core, and have identical in fact coiling number, wherein, this first coil and this second coil are adjacent, and this primary side coiling group is between this second siding ring and this first coil and this second coil.
12. transformer as claimed in claim 11 is characterized in that, this first coil and this second coil are to be wound in this magnetic core around mode altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200016518U CN201015239Y (en) | 2007-01-30 | 2007-01-30 | Lighting tube power source supply circuit and its transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200016518U CN201015239Y (en) | 2007-01-30 | 2007-01-30 | Lighting tube power source supply circuit and its transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201015239Y true CN201015239Y (en) | 2008-01-30 |
Family
ID=39027035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200016518U Expired - Fee Related CN201015239Y (en) | 2007-01-30 | 2007-01-30 | Lighting tube power source supply circuit and its transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201015239Y (en) |
-
2007
- 2007-01-30 CN CNU2007200016518U patent/CN201015239Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080130 Termination date: 20100130 |