CN201655496U - Transformer and backlight device - Google Patents
Transformer and backlight device Download PDFInfo
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- CN201655496U CN201655496U CN2009202920050U CN200920292005U CN201655496U CN 201655496 U CN201655496 U CN 201655496U CN 2009202920050 U CN2009202920050 U CN 2009202920050U CN 200920292005 U CN200920292005 U CN 200920292005U CN 201655496 U CN201655496 U CN 201655496U
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Abstract
The utility model relates to a transformer and a backlight device, in particular to the transformer with a built-in protective capacitor and the backlight device applying the transformer. The backlight device comprises a power module, a light tube and the transformer, wherein the transformer comprises a wire winding bracket, a primary coil, a secondary coil and a guide plate, the wire winding bracket is provided with a high voltage side wire winding region and a pin, the primary coil is coupled to the power module, the secondary coil is wound on the high voltage side wire winding region, one end of the secondary coil is electrically connected with a first pin, the first pin is coupled to the light tube, the high voltage side wire winding region is provided with a partition plate, the guide plate is arranged in the partition plate so that the guide plate and the secondary coil form a parasitic capacitor. At least one guiding piece is embedded in the wire winding bracket of the transformer so that the at least one guiding piece and the secondary coil of the transformer can achieve the effect of the parasitic capacitor and the parasitic capacitor is used as the protective capacitor of a backlight device circuit.
Description
Technical field
The utility model is about a kind of transformer and back lighting device, and particularly about a kind of back lighting device that has the transformer of built-in protection electric capacity and adopt this kind transformer.
Background technology
In recent years, along with the size of display panels constantly increases, (ColdCathode Fluorescent Lamp, back lighting device CCFL) are applied to provide display panels required high-quality light source more widely to comprise a plurality of cold cathode fluorescent lamp.Because the lighting tube brightness of many fluorescent tubes back lighting device is relevant with the lamp current of this fluorescent tube of flowing through; therefore; how the difficult problem that many fluorescent tubes back lighting device is faced makes each lamp tube current of flowing through take place with the phenomenon of avoiding each lighting tube brightness inequality about equally if comprising, and the problems such as circuit protection mechanism when the circuit of many fluorescent tubes back light system is short-circuited or abnormality such as open circuit.
Traditional back lighting device, the high-voltage output end of its transformer usually and the high-voltage capacitance on the circuit board couple, high-voltage capacitance herein can be used to adjust the output signal of transformer.In addition, high-voltage capacitance can be connected in series electric capacity or resistance forms bleeder circuit, with the design protection circuit.
See also Fig. 1.Fig. 1 illustrates the schematic diagram of back lighting device 1 in the prior art.As shown in Figure 1, back lighting device 1 comprises power module 10, at least one fluorescent tube 12 and transformer 14, and this sentences one and pushes away one transformer 14 and single fluorescent tube 12 is example.
Transformer 14 is driven by power module 10, in order to promote load (fluorescent tube 12).Be couple to fluorescent tube 12 and capacitor 16 in the high-pressure side of transformer 14.Capacitor 16 further is concatenated into another passive component 18 (can be resistor or capacitor etc.), and capacitor 16 forms bleeder circuit with passive component 18.This bleeder circuit can be used as the back coupling input of protection feedback circuit 20.
See also Fig. 2.Fig. 2 illustrates the schematic diagram of back lighting device 1 among Fig. 1 and transformer 14.As shown in Figure 2, transformer 14 comprises drum stand 140, main coil 142 the following coils 144.Main coil 142 couples with power module 10.Inferior coil 144 is wrapped in the high-pressure side winding region 1402 of drum stand 140, and an end of inferior coil 144 and fluorescent tube 12 and capacitor 16 electric connections.Capacitor 16, passive component 18 and protection feedback circuit 20 promptly form known high-voltage capacitance dividing potential drop feedback circuit framework.
As shown in Figure 1, traditional back lighting device need be provided with the capacitor that cooperates the transformer output, if transformer is one to push away four transformers, then needs to be provided with simultaneously at least four capacitors, as the usefulness of protective circuit.Yet along with the progress of processing procedure, the circuit size of back lighting device is more and more little, a large amount of capacitors is set on circuit board uses to cooperate transformer, and the space configuration is difficult in the circuit design except being provided with of capacitor also caused the cost.
Therefore, the back lighting device that mainly is to provide a kind of transformer and uses this transformer of the present utility model is to address the above problem.
The utility model content
The purpose of this utility model is to provide a kind of transformer, is applicable to back lighting device, and described transformer comprises drum stand, inferior coil and first guide plate.Have the high-pressure side winding region on this drum stand, and this high-pressure side winding region has first dividing plate; This time coil is wound on this high-pressure side winding region; This first guide plate is arranged in this first dividing plate, and this first guide plate and this time coil form first capacitor parasitics.
As optional technical scheme, described back lighting device also comprises the protection feedback circuit, and this first guide plate is electrically connected to this protection feedback circuit in this back lighting device.
As optional technical scheme, described transformer also comprises second guide plate, and described high-pressure side winding region has second partition in addition, and this second guide plate is arranged in this second partition, and this second guide plate and this time coil form second capacitor parasitics.
As optional technical scheme, this second guide plate is electrically connected to the protection feedback circuit in this back lighting device.
According to an embodiment, the utility model provides a kind of back lighting device, it comprises power module, first fluorescent tube and above-mentioned transformer, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to coupling with this power module, and this time coil couples this first fluorescent tube.
According to an embodiment, the utility model provides a kind of transformer, is applicable to back lighting device, and described transformer comprises drum stand, for the first time coil, coil, first guide plate and second guide plate for the second time.Have the first high-pressure side winding region, the second high-pressure side winding region on this drum stand, this first high-pressure side winding region has first dividing plate, and this second high-pressure side winding region has second partition; This, coil was wound on this first high-pressure side winding region first time; This, coil was wound on this second high-pressure side winding region second time; This first guide plate is arranged in this first dividing plate, this first guide plate and this first time coil form first capacitor parasitics; This second guide plate is arranged in this second partition, this second guide plate and this second time coil form second capacitor parasitics.
As optional technical scheme, this first guide plate and this second guide plate are electrically connected to the protection feedback circuit in this back lighting device.
According to an embodiment, the utility model provides a kind of back lighting device, it comprises power module, first fluorescent tube, second fluorescent tube and above-mentioned transformer, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to coupling with this power module, and this, coil coupled this first fluorescent tube first time, and this, coil coupled this second fluorescent tube second time.
According to an embodiment, the utility model provides a kind of transformer, is applicable to back lighting device, and described transformer comprises drum stand, inferior coil and guide plate.Have the high-pressure side winding region on this drum stand, and this high-pressure side winding region has first dividing plate, this first dividing plate is along the first direction setting; This time coil is wound on this high-pressure side winding region; This guide plate is along the second direction setting that is different from this first direction, and this guide plate and this time coil form capacitor parasitics.
As optional technical scheme, described second direction is vertical with this first direction.
As optional technical scheme, described back lighting device also comprises the protection feedback circuit, and this guide plate electrically connects this protection feedback circuit.
According to an embodiment, the utility model provides a kind of back lighting device, it comprises power module, first fluorescent tube and above-mentioned transformer, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to coupling with this power module, and this, coil coupled this first fluorescent tube first time.
According to an embodiment, the utility model provides a kind of transformer, is applicable to back lighting device, and described transformer comprises drum stand, for the first time coil, coil and guide plate for the second time.Have the first high-pressure side winding region, the second high-pressure side winding region on this drum stand, and this first high-pressure side winding region has first dividing plate, this second high-pressure side winding region has second partition, and this first dividing plate and this second partition are along the first direction setting; This, coil was wound on this first high-pressure side winding region first time; This is coil for the second time, is wound on this second high-pressure side winding region; This guide plate, along the second direction setting that is different from this first direction, this guide plate and this be coil and this capacitor parasitics of coil formation for the second time for the first time.
As optional technical scheme, described second direction is vertical with this first direction.
As optional technical scheme, described back lighting device also comprises the protection feedback circuit, and this guide plate electrically connects this protection feedback circuit.
According to an embodiment, the utility model provides a kind of back lighting device, it comprises power module, first fluorescent tube, second fluorescent tube and above-mentioned transformer, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, and this main coil is wound on this low-pressure side winding region and in order to couple with this power module; The guide plate of described transformer and this second time coil form second capacitor parasitics, and this, coil coupled this first fluorescent tube first time, and this, coil coupled this second fluorescent tube second time.
Compared to prior art; transformer of the present utility model and the back lighting device that adopts this kind transformer; wherein bury at least one guide plate underground in the drum stand of transformer; cause this at least one guide plate can form the effect of capacitor parasitics with the inferior coil of this transformer; utilize the change in voltage of this capacitor parasitics detecting transformer, and as the usefulness of the protection electric capacity of back lighting device circuit.By this, the utility model can be produced the back lighting device of low manufacturing cost and saving integrated circuit area.
Description of drawings
Fig. 1 illustrates the schematic diagram of back lighting device in the prior art.
Fig. 2 illustrates the schematic diagram of back lighting device among Fig. 1 and transformer.
Fig. 3 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in first embodiment of the present utility model.
Fig. 4 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in another embodiment of the present utility model.
Fig. 5 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in second embodiment of the present utility model.
Fig. 6 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in the 3rd embodiment of the present utility model.
Fig. 7 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in the 4th embodiment of the present utility model.
Fig. 8 illustrates the schematic diagram of the transformer that adopts according to back lighting device and back lighting device in the 5th embodiment of the present utility model.
Embodiment
See also Fig. 3.Fig. 3 illustrates the schematic diagram according to the transformer 34 of back lighting device 3 in first embodiment of the present utility model and back lighting device 3 employings.As shown in Figure 3, back lighting device 3 comprises power module 30, fluorescent tube 32 and transformer 34.Transformer 34 comprises drum stand (bobbin) 340, main coil (primarywinding) 342, inferior coil (secondary winding) 344 and guide plate C1.It should be noted that the transformer 34 of present embodiment also is regardless of in the framework that is limited to specific back lighting device 3, transformer 34 also can extensively cooperate different back lighting devices to use or be applied in the various electronic installations.
In the practical application, the agent structure of transformer 34 is a drum stand 340, and the purposes of drum stand 340 is support coils and makes things convenient for magnetic core to pass through that drum stand 340 can be made by insulating material (for example nylon Nylon and polyethylene terephthalate PET).Drum stand 340 is told different winding regions with baffle region usually.
In this embodiment, drum stand 340 has low-pressure side winding region 3400, high-pressure side winding region 3402, pin PIN1 and pin PIN2.Main coil 342 is wound on the low-pressure side winding region 3400 and with power module 30 and couples.Inferior coil 344 is wound on the high-pressure side winding region 3402 and an end and the pin PIN1 of inferior coil 344 electrically connect.Pin PIN1 is coupled to the fluorescent tube 32 of back lighting device 3.
As shown in Figure 3, high-pressure side winding region 3402 has dividing plate 34021.Guide plate C1 is arranged in the dividing plate 34021, and guide plate C1 and pin PIN2 electric connection.
In practical application, guide plate C1 can be conductive material (for example metal material) and constitutes, but not as limit.According to capacitance principle, can form parasitic capacitor parasitics between guide plate C1 and time coil 344.The mode that the capacitance of this parasitism capacitor parasitics can see through the specification of adjusting guide plate C1 designs.Therefore, the parasitic capacitor parasitics that forms between guide plate and time coil can be used as built-in capacitor parasitics, uses and saves extra required extra cost and the space of high-voltage capacitor of realization on circuit board.
It should be noted that in first embodiment, the pin PIN2 that electrically connects with guide plate C1 can be sky and connects (as shown in Figure 3).In practical application, pin PIN2 can be further with circuit board on other assembly couple, in other words, pin PIN2 can be used as the signal end of other purposes of transformer 34, for example is used to protect feedback function, but not as limit.
See also Fig. 4.Fig. 4 illustrate according to back lighting device 3 in another embodiment of the present utility model ' and the transformer 34 of back lighting device 3 ' employing ' schematic diagram.Back lighting device 3 ' be with the maximum difference of back lighting device in first embodiment, back lighting device 3 ' further comprise passive component 36 ' and protection feedback circuit 38 '.In this embodiment, pin PIN2 ' and non-NULL connect, but be coupled to passive component 36 ' and the protection feedback circuit 38 '.As shown in Figure 4, pin PIN2 ' and passive component 36 ' electric connection and see through passive component 36 ' be coupled to earth terminal.Protection feedback circuit 38 ' then be electrically connected to pin PIN2 ' and passive component 36 ' between.
In practical application, passive component 36 ' can be passive electronic building bricks such as resistor, capacitor or inductor.Passive component 36 herein ' be used for and transformer 34 ' guide plate C1 ' connect with the parasitic capacitor parasitics of time coil 344 ' formations, with the formation bleeder circuit.The output of the dividing potential drop of this bleeder circuit can see through the area size of adjusting guide plate C1 ', guide plate C1 ' and inferior coil 344 ' between distance or directly adjust the passive component 36 of connecting on the circuit board ' parameter to design.When (short circuit or open circuit) takes place when unusual fluorescent tube; protection feedback circuit 38 ' can detect change in voltage on the transformer by parasitic capacitance; and then notification controller (not graphic), allow controller close back lighting device 3 ', just do not allow back lighting device 3 ' work on.
Be noted that, back lighting device 3 ' extra high-voltage capacitance need be set on circuit board, only need transformer 34 ' at least one sheet metal is set, to form transformer 34 ' built-in high-pressure side protection electric capacity.By this, the integral body that can save effectively on the circuit design is provided with the space.
See also Fig. 5.Fig. 5 illustrates the schematic diagram according to the transformer 54 of back lighting device 5 in second embodiment of the present utility model and back lighting device 5 employings.Be that with the difference of first embodiment back lighting device 5 is one to push away two back lighting device, it desires to promote simultaneously two fluorescent tubes (fluorescent tube 52a and fluorescent tube 52b).The transformer 54 of back lighting device 5 further comprises guide plate C2, that is to say, transformer 54 comprises two guide plates such as guide plate C1 and guide plate C2 altogether.As shown in Figure 5, guide plate C2 is embedded in the dividing plate 54022 of high-pressure side winding region 5402.
In this embodiment, drum stand 540 has pin PIN3 and pin PIN4 in addition.Pin PIN3 electrically connects and is coupled to fluorescent tube 52b with the other end of time coil 540.Guide plate C2 and pin PIN4 electrically connect; and pin PIN4 can be sky and connects (as shown in Figure 5); or in another embodiment; pin PIN4 can further be coupled to passive component and protection feedback circuit; with dividing potential drop input as the back coupling protection; other structure in the connected mode of its bleeder circuit and the back lighting device 5 is described similar to previous embodiment, so do not give unnecessary details in addition at this.
See through above-mentioned structure, the position that guide plate C2 is provided with can form a parasitic capacitor parasitics with inferior coil 544.That is to say that the high-pressure side output of transformer 54 has two guide plates, the formed parasitic capacitor parasitics of its centering guide C1 can be corresponding to fluorescent tube 52a, and the formed parasitic capacitor parasitics of guide plate C2 can be corresponding to fluorescent tube 52b.By this, the utility model can form and have one of built-in protection electric capacity and push away two transformers 54 and back lighting device 5.
See also Fig. 6.Fig. 6 illustrates the schematic diagram according to the transformer 74 of back lighting device 7 in the 3rd embodiment of the present utility model and back lighting device 7 employings.As shown in Figure 6, transformer 74 is one to push away two transformer, and it is in order to promote two fluorescent tubes simultaneously.
Back lighting device 7 comprises power module 70, fluorescent tube 72a, fluorescent tube 72b and transformer 74.Transformer 74 comprises drum stand 740, main coil 742, coil 744, coil 746, guide plate C1 and guide plate C2 for the second time for the first time.
In this embodiment, drum stand 740 has low-pressure side winding region 7400, the first high-pressure side winding region 7402, the second high-pressure side winding region 7404, pin PIN1, pin PIN2, pin PIN3 and pin PIN4.Main coil 742 is wound on the low-pressure side winding region 7400 and with power module 70 and couples.
Coil 744a system is wound on the first high-pressure side winding region 7402 and an end and the pin PIN1 electric connection of coil 744 for the first time for the first time.Pin PIN1 system is coupled to the fluorescent tube 72a of back lighting device 7.
The first high-pressure side winding region 7402 has dividing plate 74021.Guide plate C1 is arranged in the dividing plate 74021, and pin PIN1 system and fluorescent tube 72a couple, and guide plate C1 and pin PIN2 couple.In fact, guide plate C1 can be made by guide metal.According to capacitance principle, the guide plate C1 and the first time can equivalence form the first parasitic capacitor parasitics between the coil 744.
The second high-pressure side winding region 7404 has dividing plate 74041.Guide plate C2 is arranged in the dividing plate 74041.In fact, guide plate C2 can be made by guide metal.According to capacitance principle, guide plate C2 and for the second time coil 746 between can equivalence form second capacitor parasitics.
See through above-mentioned structure, the high-pressure side output of transformer 74 has two guide plates, and its centering guide C1 formed first parasitic capacitor parasitics can be corresponding to fluorescent tube 72a, then can be corresponding to fluorescent tube 72b as for the guide plate C2 formed second parasitic capacitor parasitics.By this, the utility model can form and have one of built-in protection electric capacity and push away two transformers 74 and back lighting device 7.
See also Fig. 7.Fig. 7 illustrates the schematic diagram according to the transformer 94 of back lighting device 9 in the 4th embodiment of the present utility model and back lighting device 9 employings.Compared to the 3rd embodiment, transformer 94 is one to push away four transformer, and it is in order to promote four fluorescent tubes (fluorescent tube 92a, fluorescent tube 92b, fluorescent tube 92c and fluorescent tube 92d) simultaneously.
Compare the back lighting device 7 in the 3rd embodiment, the transformer 94 of the back lighting device 9 of this embodiment further comprises guide plate C3 and guide plate C4, that is to say, transformer 94 comprises the four sides guide plate altogether.As shown in Figure 7, guide plate C3 is embedded in the dividing plate 94022 of the first high-pressure side winding region 9402, and guide plate C4 then is embedded in the dividing plate 94042 of the second high-pressure side winding region 9404.Other corresponding circuit structure in the back lighting devices 9 such as pin PIN1～PIN8 is similar to previous described embodiment, so do not give unnecessary details separately at this.
In this embodiment, guide plate C3 can be corresponding to the trixenie capacitor of fluorescent tube 92c in order to form, and guide plate C4 then can be corresponding to the 4th capacitor parasitics of fluorescent tube 92d in order to form.That is to say that the high-pressure side output of transformer 94 has four guide plates (guide plate C1, C2, C3 and C4), thus four parasitic capacitor parasiticses can be formed respectively, to correspond respectively to four circuit loads ( fluorescent tube 92a, 92b, 92c and 92d).By this, the utility model can form and have one of built-in protection electric capacity and push away four transformers 94 and back lighting device 9.
See also Fig. 8.Fig. 8 illustrates the schematic diagram according to the transformer 84 of back lighting device 8 in the 5th embodiment of the present utility model and back lighting device 8 employings.As shown in Figure 8, transformer 84 is one to push away four transformer, and it is in order to promote four fluorescent tubes ( fluorescent tube 82a, 82b, 82c and 82d) simultaneously.
Back lighting device 9 in the 4th embodiment, the dividing plate 84021,84022,84041 and 84042 in the back lighting device 8 is all along the first direction setting, but guide plate C1 is then along the second direction setting that is different from this first direction.In fact, this second direction can be vertical with this first direction, but not as limit.And guide plate C1 will stride across each output of back lighting device 9.
Since guide plate C1 be arranged at coil 844 for the first time and for the second time coil 846 near, and guide plate C1 strides across each output of back lighting device 9, thus guide plate C1 can with the first time coil 844 and coil 846 formation capacitor parasiticses for the second time.Guide plate C1 is coupled to pin PIN2, then can further be coupled to first passive component and the first protection feedback circuit as for pin PIN2.
Compared to prior art; transformer of the present utility model and the back lighting device that adopts this kind transformer; wherein bury at least one guide plate underground in the drum stand of transformer; cause this at least one guide plate can form the effect of capacitor parasitics, and can be used as the usefulness of the protection electric capacity of back lighting device circuit with the inferior coil of this transformer.By this, the utility model can be produced the back lighting device that has low manufacturing cost and can effectively save the integrated circuit area.
By the detailed description of above preferable embodiment, hope can be known description feature of the present utility model and spirit more, and is not to be limited of the present utility model with above-mentioned disclosed embodiment.
Claims (16)
1. a transformer is applicable to back lighting device, it is characterized in that described transformer comprises:
Drum stand has the high-pressure side winding region on it, and this high-pressure side winding region has first dividing plate;
Inferior coil is wound on this high-pressure side winding region; And
First guide plate is arranged in this first dividing plate, and this first guide plate and this time coil form first capacitor parasitics.
2. transformer according to claim 1 is characterized in that: described back lighting device also comprises the protection feedback circuit, and this first guide plate is electrically connected to this protection feedback circuit in this back lighting device.
3. transformer according to claim 1, it is characterized in that: described transformer also comprises second guide plate, described high-pressure side winding region has second partition in addition, and this second guide plate is arranged in this second partition, and this second guide plate and this time coil form second capacitor parasitics.
4. transformer according to claim 3 is characterized in that: this second guide plate is electrically connected to the protection feedback circuit in this back lighting device.
5. a back lighting device is characterized in that, comprises:
Power module;
First fluorescent tube; And
As any described transformer of claim in the claim 1 to 4, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to coupling with this power module, and this time coil couples this first fluorescent tube.
6. a transformer is applicable to back lighting device, it is characterized in that described transformer comprises:
Drum stand has the first high-pressure side winding region, the second high-pressure side winding region on it, this first high-pressure side winding region has first dividing plate, and this second high-pressure side winding region has second partition;
Coil is wound on this first high-pressure side winding region for the first time;
Coil is wound on this second high-pressure side winding region for the second time;
First guide plate is arranged in this first dividing plate, this first guide plate and this first time coil form first capacitor parasitics; And
Second guide plate is arranged in this second partition, this second guide plate and this second time coil form second capacitor parasitics.
7. transformer according to claim 6 is characterized in that: this first guide plate and this second guide plate are electrically connected to the protection feedback circuit in this back lighting device.
8. a back lighting device is characterized in that, comprises:
Power module;
First fluorescent tube;
Second fluorescent tube; And
As any described transformer of claim in the claim 6 to 7, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to couple with this power module, and this, coil coupled this first fluorescent tube first time, and this, coil coupled this second fluorescent tube second time.
9. a transformer is applicable to back lighting device, it is characterized in that described transformer comprises:
Drum stand has the high-pressure side winding region on it, and this high-pressure side winding region has first dividing plate, and this first dividing plate is along the first direction setting;
Inferior coil is wound on this high-pressure side winding region; And
Guide plate, along the second direction setting that is different from this first direction, this guide plate and this time coil form capacitor parasitics.
10. transformer according to claim 9 is characterized in that: described second direction is vertical with this first direction.
11. transformer according to claim 10 is characterized in that: described back lighting device also comprises the protection feedback circuit, and this guide plate electrically connects this protection feedback circuit.
12. a back lighting device is characterized in that, comprises:
Power module;
First fluorescent tube; And
As any described transformer of claim in the claim 9 to 11, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, this main coil is wound on this low-pressure side winding region and in order to coupling with this power module, and this, coil coupled this first fluorescent tube first time.
13. a transformer is applicable to back lighting device, it is characterized in that described transformer comprises:
Drum stand has the first high-pressure side winding region, the second high-pressure side winding region on it, and this first high-pressure side winding region has first dividing plate, and this second high-pressure side winding region has second partition, and this first dividing plate and this second partition are along the first direction setting;
Coil is wound on this first high-pressure side winding region for the first time;
Coil is wound on this second high-pressure side winding region for the second time; And
Guide plate, along the second direction setting that is different from this first direction, this guide plate and this be coil and this capacitor parasitics of coil formation for the second time for the first time.
14. transformer according to claim 13 is characterized in that: described second direction is vertical with this first direction.
15. transformer according to claim 13 is characterized in that: described back lighting device also comprises the protection feedback circuit, and this guide plate electrically connects this protection feedback circuit.
16. a back lighting device is characterized in that, comprises:
Power module;
First fluorescent tube;
Second fluorescent tube; And
As any described transformer of claim in the claim 13 to 15, described transformer also comprises main coil, the drum stand of described transformer further comprises the low-pressure side winding region, and this main coil is wound on this low-pressure side winding region and in order to couple with this power module; The guide plate of described transformer and this second time coil form second capacitor parasitics, and this, coil coupled this first fluorescent tube first time, and this, coil coupled this second fluorescent tube second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202920050U CN201655496U (en) | 2009-12-07 | 2009-12-07 | Transformer and backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202920050U CN201655496U (en) | 2009-12-07 | 2009-12-07 | Transformer and backlight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201655496U true CN201655496U (en) | 2010-11-24 |
Family
ID=43120740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202920050U Expired - Fee Related CN201655496U (en) | 2009-12-07 | 2009-12-07 | Transformer and backlight device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201655496U (en) |
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2009
- 2009-12-07 CN CN2009202920050U patent/CN201655496U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20121207 |