CN101552120B - Transformer and backlight device - Google Patents
Transformer and backlight device Download PDFInfo
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- CN101552120B CN101552120B CN2009100031259A CN200910003125A CN101552120B CN 101552120 B CN101552120 B CN 101552120B CN 2009100031259 A CN2009100031259 A CN 2009100031259A CN 200910003125 A CN200910003125 A CN 200910003125A CN 101552120 B CN101552120 B CN 101552120B
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Abstract
The invention discloses a transformer and a backlight device, wherein the backlight device comprises a power module, a lighting tube and a transformer. The transformer comprises a reel, a primary coil, a secondary coil, a first guide board and a second guide board. The reel is provided with a high voltage side winding area and a pin, the primary coil is used for being coupled with the power module, the secondary coil winds around the high voltage side winding area and one end of the secondary coil is electrically connected with the pin. The pin is used for being coupled to the lighting tube ofthe backlight device. The high voltage side winding area is provided with a clapboard. The first guide board is arranged in the clapboard and electrically connected with the pin. The second guide boa rd is arranged in the clapboard and corresponds to the first guide board. Therefore, the first guide board and the second guide board form a capacitor.
Description
Technical field
The present invention is relevant for a kind of transformer and back lighting device, and particularly builds the transformer of protection electric capacity and the back lighting device that adopts this kind transformer relevant for a kind of in having.
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 CCFLs.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 and flows through each lamp tube current about equally avoiding the uneven phenomenon of each lighting tube brightness to take place 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, the high-voltage capacitance here 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 shows the sketch map 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.
Please consult Fig. 2 in the lump, Fig. 2 shows the sketch map 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 the high-voltage capacitance dividing potential drop feedback circuit framework of convention.
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 need be provided with at least four capacitors simultaneously, 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.
Summary of the invention
The back lighting device that main purpose of the present invention is that a kind of transformer is provided and uses this transformer is to address the above problem.
The present invention provides a kind of transformer, and it is applicable to the back lighting device with first fluorescent tube, and this transformer comprises drum stand, inferior coil, first guide plate and second guide plate.
According to the present invention, have the high-pressure side winding region and first pin on this drum stand, inferior coil is wound on the winding region of high-pressure side and an end and first pin of inferior coil electrically connect.First pin is in order to be coupled to first fluorescent tube of back lighting device.The high-pressure side winding region has first dividing plate, and first guide plate is arranged in first dividing plate and with first pin and electrically connects; Second guide plate be arranged in first dividing plate and the position to should first guide plate.By this, first guide plate and second guide plate form first capacitor.
The present invention also provides a kind of transformer; It is applicable to back lighting device; Wherein back lighting device has first fluorescent tube and second fluorescent tube, and this transformer comprises drum stand, for the first time coil, coil, first guide plate, second guide plate, the 3rd guide plate and the 4th guide plate for the second time.
According to the present invention, have the first high-pressure side winding region, the second high-pressure side winding region, first pin and second pin on this drum stand.Coil is wound on the first high-pressure side winding region and an end and the electric connection of first pin of coil for the first time for the first time.First pin is in order to be coupled to first fluorescent tube of back lighting device.Coil is wound on the second high-pressure side winding region and an end and the electric connection of second pin of coil for the second time for the second time.Second pin is in order to be coupled to second fluorescent tube of back lighting device.The first high-pressure side winding region has first dividing plate, and first guide plate is arranged in first dividing plate and with first pin and electrically connects; Second guide plate be arranged in first dividing plate and the position to should first guide plate.By this, first guide plate and second guide plate form first capacitor.The second high-pressure side winding region has second partition, and the 3rd guide plate is arranged in the second partition and with second pin and electrically connects; The 4th guide plate be arranged in the second partition and the position to should the 3rd guide plate.By this, the 3rd guide plate and the 4th guide plate form second capacitor.
The present invention provides a kind of back lighting device, and it comprises power module, first fluorescent tube and transformer, and wherein this transformer comprises drum stand, main coil, inferior coil, first guide plate and second guide plate.
According to the present invention; Have low-pressure side winding region, high-pressure side winding region and first pin on this drum stand; Main coil is wound on the low-pressure side winding region and in order to couple with power module, inferior coil is wound on the winding region of high-pressure side and an end and first pin of inferior coil electrically connect.First pin is in order to be coupled to first fluorescent tube of back lighting device.The high-pressure side winding region has first dividing plate, and first guide plate is arranged in first dividing plate and with first pin and electrically connects; Second guide plate be arranged in first dividing plate and the position to should first guide plate.By this, first guide plate and second guide plate form first capacitor.
The present invention also provides a kind of back lighting device; It comprises power module, first fluorescent tube, second fluorescent tube and transformer, and wherein this transformer comprises drum stand, main coil, coil, coil, first guide plate, second guide plate, the 3rd guide plate and the 4th guide plate for the second time for the first time.
According to the present invention, have low-pressure side winding region, the first high-pressure side winding region, the second high-pressure side winding region, first pin and second pin on this drum stand.Main coil is wound on the low-pressure side winding region and in order to couple with power module.Coil is wound on the first high-pressure side winding region and an end and the electric connection of first pin of coil for the first time for the first time.First pin is in order to be coupled to first fluorescent tube of back lighting device.Coil is wound on the second high-pressure side winding region and an end and the electric connection of second pin of coil for the second time for the second time.Second pin is in order to be coupled to second fluorescent tube of back lighting device.The first high-pressure side winding region has first dividing plate, and first guide plate is arranged in first dividing plate and with first pin and electrically connects; Second guide plate be arranged in first dividing plate and the position to should first guide plate.By this, first guide plate and second guide plate form first capacitor.The second high-pressure side winding region has second partition, and the 3rd guide plate is arranged in the second partition and with second pin and electrically connects; The 4th guide plate be arranged in the second partition and the position to should the 3rd guide plate.By this, the 3rd guide plate and the 4th guide plate form second capacitor.
Compared to prior art, transformer of the present invention and the back lighting device that adopts this kind transformer are wherein buried two guide cards that are oppositely arranged at least underground in the drum stand of transformer.Two guide cards are parallel and keep at a certain distance away and be oppositely arranged the effect that can form capacitor, and are coupled to the high-pressure side of transformer, as the usefulness of the protection electric capacity of back lighting device circuit.By this, form low manufacturing cost and the smart back lighting device of economizing the integrated circuit area.
Description of drawings
Fig. 1 shows the sketch map of back lighting device in the prior art.
Fig. 2 shows the sketch map of back lighting device among Fig. 1 and transformer.
Fig. 3 shows the sketch map of the transformer that adopts according to back lighting device and back lighting device in first specific embodiment of the present invention.
Fig. 4 shows the sketch map of the transformer that adopts according to back lighting device and back lighting device in another specific embodiment of the present invention.
Fig. 5 shows the sketch map of the transformer that adopts according to back lighting device and back lighting device in second specific embodiment of the present invention.
Fig. 6 shows the sketch map of the transformer that adopts according to back lighting device and back lighting device in the 3rd specific embodiment of the present invention.
Fig. 7 shows the sketch map of the transformer that adopts according to back lighting device and back lighting device in the 4th specific embodiment of the present invention.
Embodiment
For making the object of the invention, structure, characteristic and function thereof there are further understanding, cooperate embodiment to specify as follows now.
See also Fig. 3, Fig. 3 shows the sketch map according to the transformer 34 of back lighting device 3 in first specific embodiment of the present invention 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 (primary winding) 342, inferior coil (secondary winding) 344, guide plate C1 and guide plate C2.What need explanation is, the transformer 34 of present embodiment is not limited in the framework of specific back lighting device 3, and 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 processed by insulating material (like nylon Nylon, PET 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 and guide plate C2 are arranged in the dividing plate 34021, and its centering guide C1 and pin PIN1 electrically connect and form the relation that couples with fluorescent tube 32.Guide plate C2 and pin PIN2 electrically connect.
The corresponding guide plate C1 in the position that guide plate C2 is provided with.Guide plate C1 and guide plate C2 are all conductive material, and it can be formed by guide metal.At a distance of certain distance and be relatively arranged on two guide metals (guide plate C1 and guide plate C2) in the dielectric material (dividing plate 34021) according to the principle of electric capacity, can equivalent formation capacitor between guide plate C1 and guide plate C2.
The specification that the capacitance of this capacitor can see through guide plate C1 and guide plate C2 designs or adjusts.The capacity plate antenna that the parallel guide plate that equates with two areas forms is an example, and its capacitance approximates
(when A＞＞d
2), wherein ε is the dielectric coefficient of dielectric material (dividing plate 34021); A is the area of guide plate; D is the distance between two guide plates (guide plate C1 and guide plate C2).By this, can see through and in the dividing plate of the high-pressure side of transformer 34, bury the capacitor that two guide plates are built in forming underground, to save extra space and the manufacturing cost that high-voltage capacitance is set on circuit board.
What need explanation is, in first specific embodiment, during the capacitor in guide plate C1 forms with guide plate C2 equivalence, built, can be sky with the pin PIN2 of guide plate C2 electric connection and connects (as shown in Figure 3).In practical application, pin PIN2 can be further with circuit board on other assembly couple, the signal end in using as other of transformer 34 for example is used to protect feedback function.
See also Fig. 4, Fig. 4 show according to back lighting device 3 in another specific embodiment of the present invention ' and the transformer 34 of back lighting device 3 ' employing ' sketch map.Back lighting device 3 ' with first specific embodiment in maximum difference be, back lighting device 3 ' further comprise passive component 36 ' and protection feedback circuit 38 '.Pin PIN2 ' and non-NULL connect in this embodiment, but with passive component 36 ' and protection feedback circuit 38 ' couple.As shown in Figure 4, pin PIN2 ' and passive component 36 ' electric connection also see through passive component 36 ' be coupled to earth terminal.Protection feedback circuit 38 ' be electrically connected to pin PIN2 ' and passive component 36 ' between.
Passive component 36 ' can be passive electronic building bricks such as resistor, capacitor or inductor.The passive component 36 here ' be used for and transformer 34 ' centering guide C1 and guide plate C2 form in build capacitors in series, to form bleeder circuit.The output of the dividing potential drop of bleeder circuit can see through adjustment bury area size, the spacing distance of two guide plates relatively underground or directly adjust series connection passive component 36 on the circuit board ' parameter design.The output of the dividing potential drop of this bleeder circuit can in order to feedback to protect feedback circuit 38 ' input stage, reach the effect of transformer circuit protection.Its principle is similar with the high-voltage capacitance dividing potential drop feedback circuit framework of general convention, by those skilled in the art are familiar with not giving unnecessary details in addition at this.
Be noted that, back lighting device 3 ' extra high-voltage capacitance need be set on circuit board here, only need transformer 34 ' in bury two relative sheet metals underground, with form transformer 34 ' in the high-pressure side protection electric capacity built.By this, the integral body that can save on the circuit design is provided with the space.
See also Fig. 5, Fig. 5 shows the sketch map according to the transformer 54 of back lighting device 5 in second specific embodiment of the present invention and back lighting device 5 employings.Be that with the difference of first specific 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, fluorescent tube 52b).The transformer 54 of back lighting device 5 further comprises guide plate C3 and guide plate C4, that is to say that transformer 54 comprises four sides guide plates such as guide plate C1, guide plate C2, guide plate C3 and guide plate C4 altogether.As shown in Figure 5, guide plate C3 and guide plate C4 are embedded in the dividing plate 54022 of high-pressure side winding region 5402 in pairs.
In this embodiment, drum stand 540 has pin PIN3 and pin PIN4 in addition.Guide plate C3 and pin PIN3 electrically connect, and the other end of pin PIN3 and time coil 544 electrically connects and be coupled to fluorescent tube 52b.Guide plate C4 and pin PIN4 electrically connect; And pin PIN4 can be sky and connects (as shown in Figure 5); Or pin PIN4 can further be coupled to passive component and the dividing potential drop input of protection feedback circuit to protect as back coupling in another embodiment; Other structure in the connected mode of its bleeder circuit and the back lighting device 5 is said similar with previous embodiment, so do not give unnecessary details in addition at this.
See through said structure, guide plate C3 that is oppositely arranged and guide plate C4 form capacitor.That is to say that the high-pressure side output of transformer 54, the capacitor that forms except guide plate C1 and guide plate C2 can corresponding fluorescent tube 52a, the capacitor that other has guide plate C3 and guide plate C4 to form can corresponding fluorescent tube 52b.Can form by this to build in having protects one of electric capacity to push away two transformers 54 and back lighting device 5.
See also Fig. 6, Fig. 6 shows the sketch map according to the transformer 74 of back lighting device 7 in the 3rd specific embodiment of the present invention and back lighting device 7 employings.Transformer 74 is one to push away two transformer, and it desires to promote simultaneously two fluorescent tubes.
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, guide plate C2, guide plate C3 and guide plate C4 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 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 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 and guide plate C2 are arranged in the dividing plate 74021, and its centering guide C1 and pin PIN1 electrically connect and form the relation that couples with fluorescent tube 72a.Guide plate C2 and pin PIN2 electrically connect.The corresponding guide plate C1 in the position that guide plate C2 is provided with.Guide plate C1 and guide plate C2 are all and can be formed by guide metal.According to the principle of capacity plate antenna, can equivalence form capacitor between guide plate C1 and guide plate C2.
The second high-pressure side winding region 7404 has dividing plate 74041.Guide plate C3 and guide plate C4 are arranged in the dividing plate 74041, and its centering guide C3 and pin PIN3 electrically connect and form the relation that couples with fluorescent tube 72b.Guide plate C4 and pin PIN4 electrically connect.The corresponding guide plate C3 in the position that guide plate C4 is provided with.Guide plate C3 and guide plate C4 are all and can be formed by guide metal.According to the principle of capacity plate antenna, also can equivalence form capacitor between guide plate C3 and guide plate C4.
See through said structure, the high-pressure side output of transformer 74 has capacitor that guide plate C1 and guide plate C2 form can corresponding fluorescent tube 72a, and the capacitor that guide plate C3 and guide plate C4 form can corresponding fluorescent tube 72b.Can form by this to build in having protects one of electric capacity to push away two transformers 74 and back lighting device 7.
See also Fig. 7, Fig. 7 shows the sketch map according to the transformer 94 of back lighting device 9 in the 4th specific embodiment of the present invention and back lighting device 9 employings.Compare with the 3rd specific embodiment, transformer 94 is one to push away four transformer, and it desires to promote simultaneously four fluorescent tubes (fluorescent tube 92a, fluorescent tube 92b, fluorescent tube 92c, fluorescent tube 92d).
Compare the back lighting device 9 in the 3rd specific embodiment; The transformer 94 of the back lighting device 9 of this embodiment further comprises drum stand 940, main coil 942, coil 944, coil 946, guide plate C5, guide plate C6, guide plate C7 and guide plate C8 for the second time for the first time, that is to say that transformer 94 comprises the octahedral guide plate altogether.In this embodiment, drum stand 940 has low-pressure side winding region 9400, the first high-pressure side winding region 9402, the second high-pressure side winding region 9404, pin PIN1, pin PIN2, pin PIN3, pin PIN4, pin PIN5, pin PIN6, pin PIN7 and pin PIN8.Main coil 942 is wound on the low-pressure side winding region 9400 and with power module 90 and couples.As shown in Figure 7; Guide plate C1 and guide plate C2 are arranged in the dividing plate 94021; Guide plate C3 and guide plate C4 are arranged in the dividing plate 94041; Guide plate C5 and guide plate C6 are embedded in the dividing plate 94022 of the first high-pressure side winding region 9402 in pairs, and guide plate C7 and guide plate C8 are embedded in the dividing plate 94042 of the second high-pressure side winding region 9404 in pairs.Other structure in the back lighting device 9 is said similar with previous embodiment, so do not give unnecessary details in addition at this.
In this embodiment, the guide plate C5 that is oppositely arranged and guide plate C6 form can corresponding fluorescent tube 92c capacitor, guide plate C7 that is oppositely arranged and guide plate C8 form can corresponding fluorescent tube 92d capacitor.That is to say; The high-pressure side output of transformer 94 has the right guide plate (guide plate C1 and C2, guide plate C3 and C4, guide plate C5 and C6, guide plate C7 and guide plate C8) of four compositions and can form four capacitors respectively with corresponding four circuit loads (fluorescent tube 92a, fluorescent tube 92b, fluorescent tube 92c, fluorescent tube 92d).Can form by this to build in having protects one of electric capacity to push away four transformers 94 and back lighting device 9.
Compared to prior art, transformer of the present invention and the back lighting device that adopts this kind transformer are wherein buried two guide cards that are oppositely arranged at least underground in the drum stand of transformer.Two guide cards are parallel and keep at a certain distance away and be oppositely arranged the effect that can form capacitor, and are coupled to the high-pressure side of transformer, as the usefulness of the protection electric capacity of back lighting device circuit.By this, form low manufacturing cost and the smart back lighting device of economizing the integrated circuit area.
The present invention is described by above-mentioned related embodiment, yet the foregoing description is merely the example of embodiment of the present invention.Must be pointed out that the embodiment that has disclosed does not limit scope of the present invention.On the contrary, change and retouching not breaking away from the spirit and scope of the present invention to be done all belong to scope of patent protection of the present invention.
Claims (10)
1. a transformer is applicable to back lighting device, it is characterized in that this transformer comprises:
Drum stand has the high-pressure side winding region and first pin on it, and this high-pressure side winding region has first dividing plate, and wherein this first pin is in order to be coupled to first fluorescent tube of this back lighting device;
Inferior coil is wound on this high-pressure side winding region and an end of this time coil and the electric connection of this first pin;
First guide plate is arranged in this first dividing plate and electrically connects with this first pin; And
Second guide plate, be arranged in this first dividing plate and the position to should first guide plate, this first guide plate and this second guide plate form first capacitor by this.
2. transformer according to claim 1 is characterized in that this drum stand further comprises second pin, and this second guide plate and this second pin electrically connect and this second pin is coupled to passive component and protection feedback circuit in this back lighting device.
3. transformer according to claim 1; It is characterized in that further comprising the 3rd guide plate and the 4th guide plate; This drum stand has the 3rd pin in addition; The other end of the 3rd pin and this time coil electrically connects and in order to be coupled to second fluorescent tube of this back lighting device, this high-pressure side winding region has second partition in addition, and the 3rd guide plate is arranged in this second partition and with the 3rd pin and electrically connects; The 4th guide plate be arranged in this second partition and the position to should the 3rd guide plate, the 3rd guide plate and the 4th guide plate form second capacitor by this.
4. transformer according to claim 3 is characterized in that this drum stand further comprises the 4th pin, and the 4th guide plate and the 4th pin electrically connect and the 4th pin is coupled to passive component and protection feedback circuit in this back lighting device.
5. a transformer is applicable to back lighting device, it is characterized in that this transformer comprises:
Drum stand; Have the first high-pressure side winding region, the second high-pressure side winding region, first pin and second pin on it; And this first high-pressure side winding region has first dividing plate; This second high-pressure side winding region has second partition, and wherein this first pin is in order to be coupled to first fluorescent tube of this back lighting device, and this second pin is in order to be coupled to second fluorescent tube of this back lighting device;
Coil for the first time, be wound on this first high-pressure side winding region and should the first time one end and the electric connection of this first pin of coil;
Coil for the second time, be wound on this second high-pressure side winding region and should the second time one end and the electric connection of this second pin of coil;
First guide plate is arranged in this first dividing plate and electrically connects with this first pin;
Second guide plate, be arranged in this first dividing plate and the position to should first guide plate, this first guide plate and this second guide plate form first capacitor by this;
The 3rd guide plate is arranged in this second partition and electrically connects with this second pin; And
The 4th guide plate, be arranged in this second partition and the position to should the 3rd guide plate, the 3rd guide plate and the 4th guide plate form second capacitor by this.
6. transformer according to claim 5; It is characterized in that this drum stand further comprises the 3rd pin and the 4th pin; This second guide plate and the 3rd pin electrically connect and the 3rd pin is coupled to first passive component and the first protection feedback circuit in this back lighting device, and the 4th guide plate and the 4th pin electrically connect and the 4th pin is coupled to second passive component and the second protection feedback circuit in this back lighting device.
7. transformer according to claim 5; It is characterized in that further comprising the 5th guide plate, the 6th guide plate, the 7th guide plate and the 8th guide plate; This drum stand has the 3rd pin and the 4th pin in addition; The 3rd pin and this first time coil the other end electrically connect and in order to be coupled to the 3rd fluorescent tube of this back lighting device; The 4th pin and this second time coil the other end electrically connect and in order to be coupled to the 4th fluorescent tube of this back lighting device, this first high-pressure side winding region has the 3rd dividing plate in addition, this second high-pressure side winding region has the 4th dividing plate in addition; The 5th guide plate is arranged in the 3rd dividing plate and with the 3rd pin and electrically connects; The 6th guide plate be arranged in the 3rd dividing plate and the position to should the 5th guide plate, the 5th guide plate and the 6th guide plate form the 3rd capacitor by this, the 7th guide plate is arranged in the 4th dividing plate and with the 4th pin and electrically connects; The 8th guide plate be arranged in the 4th dividing plate and the position to should the 7th guide plate, the 8th guide plate and the 7th guide plate form the 4th capacitor by this.
8. transformer according to claim 7; It is characterized in that this drum stand further comprises the 5th pin and the 6th pin; The 6th guide plate and the 5th pin electrically connect and the 5th pin is coupled to first passive component and the second protection feedback circuit in this back lighting device, and the 8th guide plate and the 6th pin electrically connect and the 6th pin is coupled to second passive component and the second protection feedback circuit in this back lighting device.
9. back lighting device is characterized in that comprising:
Power module;
First fluorescent tube; And
Like each described transformer among the claim 1-4, wherein this transformer also comprises: main coil is wound on the low-pressure side winding region and in order to couple with this power module.
10. back lighting device is characterized in that comprising:
Power module;
First fluorescent tube and second fluorescent tube; And
Like each described transformer among the claim 5-8, wherein this transformer also comprises:
Main coil is wound on the low-pressure side winding region and in order to couple with this power module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100031259A CN101552120B (en) | 2009-01-06 | 2009-01-06 | Transformer and backlight device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100031259A CN101552120B (en) | 2009-01-06 | 2009-01-06 | Transformer and backlight device |
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| CN101552120A CN101552120A (en) | 2009-10-07 |
| CN101552120B true CN101552120B (en) | 2012-05-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201149806Y (en) * | 2008-01-15 | 2008-11-12 | 台龙电子股份有限公司 | Transformer structure for driving backlight module unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201149806Y (en) * | 2008-01-15 | 2008-11-12 | 台龙电子股份有限公司 | Transformer structure for driving backlight module unit |
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