CN101359531B - Transformer and lamp tube driving circuit using the transformer - Google Patents
Transformer and lamp tube driving circuit using the transformer Download PDFInfo
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- CN101359531B CN101359531B CN2007101437716A CN200710143771A CN101359531B CN 101359531 B CN101359531 B CN 101359531B CN 2007101437716 A CN2007101437716 A CN 2007101437716A CN 200710143771 A CN200710143771 A CN 200710143771A CN 101359531 B CN101359531 B CN 101359531B
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- magnetic core
- transformer
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- core set
- wound
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Abstract
The invention discloses a transformer, comprising a magnetic core group, a primary coil, a first secondary coil and at least one conductive elastic member. The magnetic core group comprises a first magnetic core and a second magnetic core. A plurality of gaps exist between the first magnetic core and the second magnetic core. The primary coil and the secondary coil are wound on the magnetic core group. At least one conductive elastic member is arranged in at least one of the gaps. In this way, the transformer can effectively reduce the vibration thereof and the noise at the time of flashover.
Description
Technical field
The present invention relates to a kind of transformer, and particularly relate to a kind of transformer with electrically conductive elastic member.
Background technology
The fluorescent tube that the backlight liquid crystal display device is adopted is generally discharge lamp, and for example cold-cathode tube (CCFL) generally all needs transformer that voltage is raise and drive discharge lamp, utilizes high-tension coil (secondary coil) to remove to drive fluorescent tube.When the fluorescent tube length of LCD and quantity increased, the power output of transformer also will and then improve, and this moment, transformer had noise problem to produce easily.
The magnetic core set of transformer generally can be divided into two magnetic cores, inserts the plastic cement pad in the gap of two magnetic cores.Yet this practice mainly contains two shortcomings: when 1) transformer operated, two magnetic cores can produce vibration, and the plastic cement pad can't absorb vibration; When 2) transformer operates,, can produce arcing phenomenon (arc), and then produce noise if between two magnetic cores high potential difference is arranged.
Therefore, the invention provides a kind of transformer, in order to address the above problem with electrically conductive elastic member.
Summary of the invention
The object of the present invention is to provide a kind of transformer with electrically conductive elastic member.
According to a preferred embodiment, transformer of the present invention comprises magnetic core set, primary coil, first secondary coil and at least one electrically conductive elastic member.Magnetic core set comprises first magnetic core and second magnetic core.A plurality of gaps are present between first magnetic core and second magnetic core.The primary coil and first secondary coil are wound in magnetic core set.At least one electrically conductive elastic member is configured at least in one of them of these a plurality of gaps.
Another category of the present invention is to provide a kind of lamp tube drive circuit, comprises a magnetic core set, primary coil, first secondary coil, first fluorescent tube and at least one electrically conductive elastic member.Magnetic core set comprises first magnetic core and second magnetic core, a plurality of gaps are present between this first magnetic core and this second magnetic core, the primary coil and first secondary coil are wound in this magnetic core set, first fluorescent tube is coupled to first secondary coil, and the electrically conductive elastic member is configured at least in one of them of these a plurality of gaps.
Thus, transformer of the present invention utilizes the electrically conductive elastic member, with the vibration of absorption magnetic core set, and the potential difference between reduction magnetic core and the magnetic core.Therefore, transformer of the present invention can effectively reduce the noise problem that vibration and arcing produced of self.
Can be further understood by following detailed Description Of The Invention and appended accompanying drawing about the advantages and spirit of the present invention.
Description of drawings
Figure 1A is the schematic diagram that illustrates the transformer of one preferred embodiment according to the present invention;
Figure 1B is the circuit diagram that illustrates transformer among Figure 1A;
Fig. 1 C is the circuit diagram that illustrates lamp tube drive circuit;
Fig. 2 A is the schematic diagram that illustrates transformer according to yet another preferred embodiment of the present invention;
Fig. 2 B is the circuit diagram that illustrates transformer among Fig. 2 A;
Fig. 2 C is the circuit diagram that illustrates lamp tube drive circuit.
The main element symbol description
1,2: transformer 3,4: lamp tube drive circuit
10,20: magnetic core set 14,240: the first secondary coils
242: second subprime coil 12,22: primary coil
16,26: electrically conductive elastic member 100,200: the first magnetic cores
102,202: the second magnetic core L1, L2: discharge lamp
Embodiment
See also Figure 1A and Figure 1B, Figure 1A is the schematic diagram that illustrates the transformer 1 of one preferred embodiment according to the present invention.Figure 1B is the circuit diagram that illustrates transformer 1 among Figure 1A.Shown in Figure 1A and Figure 1B, transformer 1 comprises magnetic core set 10, primary coil 12, first secondary coil 14 and two electrically conductive elastic members 16.Be noted that the number of electrically conductive elastic member 16 can be adjusted according to practical application, and the thickness of electrically conductive elastic member 16 can adjust according to the specification demand.
Shown in Figure 1A, magnetic core set 10 comprises first magnetic core 100 and second magnetic core 102.A plurality of gaps are present between first magnetic core 100 and second magnetic core 102.The primary coil 12 and first secondary coil 14 are wound in magnetic core set 10.Shown in Figure 1A, primary coil 12 is wrapped on first magnetic core 100, and first secondary coil 14 is wrapped on second magnetic core 102.Two electrically conductive elastic members 16 are configured in respectively in the corresponding gap.In this embodiment, electrically conductive elastic member 16 can be the element of conductive rubber or other similar characteristics.In addition, in Figure 1A, simplify the sign of having omitted drum stand for asking, in fact drum stand is the outside that is positioned at first magnetic core 100 and second magnetic core 102, the primary coil 12 and first secondary coil 14 are actually and are wrapped on the drum stand, rather than directly are wrapped on the magnetic core set.
See also Fig. 1 C, Fig. 1 C is the circuit diagram that illustrates lamp tube drive circuit 3.Transformer 1 constitutes a lamp tube drive circuit 3 with discharge lamp L1, can be used as Backlight For Liquid Crystal Display Panels.When using this transformer 1 to drive discharge lamp L1, primary coil 12 is a low-voltage coil, couples a control unit (not shown).First secondary coil 14 is a high-tension coil, couples discharge lamp L1, and first secondary coil 14 can be responded to the high pressure more than 1000 volts usually.
See also Fig. 2 A and Fig. 2 B, Fig. 2 A is the schematic diagram that illustrates transformer 2 according to yet another preferred embodiment of the present invention.Fig. 2 B is the circuit diagram that illustrates transformer 2 among Fig. 2 A.Shown in Fig. 2 A and Figure 1A, transformer 2 is in profile and coil with transformer 1 main difference.The profile of first magnetic core 200 of transformer 2 and 202 combinations of second magnetic core is the magnetic core set 20 of UU, and the profile of the magnetic core set 10 of transformer 1 is EE.In addition, the primary coil 22 of transformer 2 is wound in a side of magnetic core set, and first secondary coil 240 and second subprime coil 242 are wound in the opposite side of magnetic core set.In this embodiment, electrically conductive elastic member 26 can be conductive rubber or other likes.In addition, in Fig. 2 A, simplify the diagram of having omitted drum stand for asking, drum stand is positioned at the outside of first magnetic core 200 and second magnetic core 202, primary coil 20, first secondary coil 240 and second subprime coil 242 are actually and are wrapped on the drum stand, rather than directly are wrapped on the magnetic core set 20.
See also Fig. 2 C, Fig. 2 C is the circuit diagram that illustrates lamp tube drive circuit 4.Transformer 2 constitutes lamp tube drive circuit 4 with discharge lamp L1, L2, and primary coil 22 is a low-voltage coil, and first secondary coil 240 and second subprime coil 242 are high-tension coil, and couple discharge lamp L1, L2 respectively.
When practical application, first magnetic core and second magnetic core be also capable of being combined to become profiles such as EI, LL, UI, UT.
Be compared to prior art, transformer of the present invention utilizes electrically conductive elastic member (as conductive rubber), with the vibration of absorption magnetic core set, and the potential difference between the reduction magnetic core set.Therefore, transformer of the present invention can effectively reduce the noise problem that vibration and arcing produced of self.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category of claim of being arranged in of various changes and tool equality institute of the present invention desire application.Therefore, the category of claim that the present invention applies for should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (8)
1. transformer comprises:
Magnetic core set comprises first magnetic core and second magnetic core;
A plurality of gaps are present between this first magnetic core and this second magnetic core;
Primary coil is wound in this magnetic core set;
First secondary coil is wound in this magnetic core set; And
At least one electrically conductive elastic member is configured at least in one of them of these a plurality of gaps,
Wherein this electrically conductive elastic member is a conductive rubber.
2. transformer as claimed in claim 1, wherein a profile wherein of the synthetic following group of this first magnetic core and this second magnetic core set: EE, EI, UU, LL, UI and UT.
3. transformer as claimed in claim 1 more comprises the second subprime coil, and this second subprime coil is wound in this magnetic core set.
4. transformer as claimed in claim 3, this first coil is wound in a side of this magnetic core set, and this first secondary coil and this second subprime coil are wound in the opposite side of this magnetic core set.
5. lamp tube drive circuit comprises:
Magnetic core set comprises first magnetic core and second magnetic core;
A plurality of gaps are present between this first magnetic core and this second magnetic core;
Primary coil is wound in this magnetic core set;
First secondary coil is wound in this magnetic core set;
First fluorescent tube couples this first secondary coil; And
At least one electrically conductive elastic member is configured at least in one of them of these a plurality of gaps,
Wherein this electrically conductive elastic member is a conductive rubber.
6. lamp tube drive circuit as claimed in claim 5, wherein a profile wherein of the synthetic following group of this first magnetic core and this second magnetic core set: EE, EI, UU, LL, UI and UT.
7. lamp tube drive circuit as claimed in claim 5 more comprises second subprime coil and one second fluorescent tube, and this second subprime coil is wound in this magnetic core set, and this second fluorescent tube couples this second subprime coil.
8. lamp tube drive circuit as claimed in claim 7, this first coil is wound in a side of this magnetic core set, and this first secondary coil and this second subprime coil are wound in the opposite side of this magnetic core set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101437716A CN101359531B (en) | 2007-08-02 | 2007-08-02 | Transformer and lamp tube driving circuit using the transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101437716A CN101359531B (en) | 2007-08-02 | 2007-08-02 | Transformer and lamp tube driving circuit using the transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101359531A CN101359531A (en) | 2009-02-04 |
| CN101359531B true CN101359531B (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101437716A Expired - Fee Related CN101359531B (en) | 2007-08-02 | 2007-08-02 | Transformer and lamp tube driving circuit using the transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101359531B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091054U (en) * | 1991-02-02 | 1991-12-18 | 朱泰生 | Induction ballast |
| CN2791826Y (en) * | 2005-03-10 | 2006-06-28 | 耀胜电子股份有限公司 | High-frequency transformer structure |
-
2007
- 2007-08-02 CN CN2007101437716A patent/CN101359531B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091054U (en) * | 1991-02-02 | 1991-12-18 | 朱泰生 | Induction ballast |
| CN2791826Y (en) * | 2005-03-10 | 2006-06-28 | 耀胜电子股份有限公司 | High-frequency transformer structure |
Non-Patent Citations (1)
| Title |
|---|
| JP平8-162334A 1996.06.21 |
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| Publication number | Publication date |
|---|---|
| CN101359531A (en) | 2009-02-04 |
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Granted publication date: 20110706 Termination date: 20130802 |