KR20110005444U - Transformer and backlight apparatus - Google Patents

Abstract

The present invention discloses a transformer and a backlight device. The backlight device includes a power supply module, a lamp and a transformer. Transformers include bobbins, primary windings, secondary windings, and conductive plates. The bobbin includes a high voltage winding region and a pin. The primary winding is connected to the power module. The secondary winding is wound in the high voltage winding region, one end of which is connected to the pin and also to the lamp of the backlight device. The separator is disposed in the high voltage winding area. The conductive plate is disposed inside the separator to form a capacitor together with the secondary winding.

Transformers, backlight devices, power modules, lamps, transformers

Description

Transformers & Backlight Units {TRANSFORMER AND BACKLIGHT APPARATUS}

The present invention relates to a transformer and a backlight device, and more particularly, to a transformer having a built-in protective capacitor and a backlight device having such a transformer structure.

In recent years, as the size of a liquid crystal display (LCD) panel increases, a backlight device including a plurality of cold cathode fluorescent lamps (CCFLs) is widely used to provide high quality light sources required for a liquid crystal display panel. Each lamp brightness of the multiple lamp backlight device is associated with a current flow through the lamp. Thus, the design issues of a multiple lamp backlight device include how to keep the current through all lamps the same and how to prevent imbalances that occur between these lamps. In addition, the protection for the circuit of a multiple lamp backlight device under some fault conditions (eg short circuit, disconnection) is a significant problem even in a multiple lamp backlight system.

In traditional backlight systems, the high voltage output of the transformer is usually combined with the high voltage capacitor of the circuit board. High voltage capacitors are used to regulate the output signal of the transformer. Furthermore, the high voltage capacitor can be connected in series with another capacitor or resistor to form a voltage dividing circuit, which is part of the protection circuit.

See FIG. 1. 1 is a schematic view showing a backlight device 1 according to the prior art. As shown in FIG. 1, the backlight device 1 includes a power supply module 10, at least one lamp 12, and a transformer 14. In FIG. 1, an example is shown that includes a one-to-one transformer 14 and one single lamp 12.

The transformer 14 driven by the power supply module 10 is used to operate the load (lamp 12). The high voltage side of the transformer 14 is connected to the lamp 12 and the capacitor 16. The capacitor 16 is then connected in series with other passive components 18, which may be resistors or capacitors. Capacitor 16 and passive component 18 form a voltage divider circuit. The voltage divider circuit can generate a feedback input for the protection feedback circuit 20.

See FIG. 2. FIG. 2 is a schematic diagram illustrating the backlight device 1 and the transformer 14 of FIG. 1. As shown in FIG. 2, the transformer 14 includes a bobbin 140, a primary winding 142, and a secondary winding 144. The primary winding 142 is connected to the power module 10. The secondary winding 144 is wound around the high voltage winding region 1402 of the bobbin 140. One end of the secondary winding 144 is coupled to the lamp 12 and the capacitor 16. Capacitor 16, passive component 18 and protective feedback circuit 20 form a feedback structure having a voltage divider circuit comprising a conventional high voltage capacitor.

As shown in Figure 1, in a traditional backlight device, the capacitor must be on the output side of the transformer. If the transformer is a one-to-four transformer, at least four capacitors are required as part of the protective circuit cooperating with the one-to-four transformer. However, improved manufacturing processes so far have made circuits increasingly compact in size. Providing some capacitors on the circuit board to cooperate with the transformer is inefficient in the on-chip area allocation.

Accordingly, the present invention discloses a transformer for solving the above problems and a backlight device using the transformer.

One aspect of the present invention is to provide a transformer. The transformer is suitable for a backlight module having a first lamp. The transformer includes a bobbin, a secondary winding, and a conductive plate.

According to one embodiment of the present invention, the bobbin has a high voltage winding region and a first pin thereon. The secondary winding is wound around the high voltage winding region. One end of the secondary winding is coupled to the first pin. The first pin is coupled to the first lamp of the backlight module. The high voltage winding region has a first separator. The conductive plate is disposed inside the first separator. The conductive plate and the secondary winding form a first capacitor.

According to another embodiment of the present invention, the first separation plate is disposed along the first direction, the conductive plate is disposed in a second direction different from the first direction, the conductive plate and the secondary winding is a capacitor To form. Indeed, the second direction may be perpendicular to the first direction.

Another aspect of the present invention is to provide a transformer. The transformer is suitable for a backlight module having a first lamp and a second lamp. The transformer includes a bobbin, a first secondary winding, a second secondary winding, a first conductive plate, and a second conductive plate.

According to one embodiment of the present invention, the bobbin has a first high voltage winding region, a second high voltage winding region, and first and second pins thereon. The first secondary winding is wound around the first high voltage winding region. One end of the first secondary winding is connected to the first pin. The first pin is connected to the first lamp of the backlight module. The second secondary winding is wound around the second high voltage winding region. One end of the second secondary winding is connected to the second pin. The second pin is connected to the second lamp of the backlight module. The first high voltage winding region has a first separator. The first conductive plate is disposed inside the first separator. The first conductive plate and the first secondary winding form a first capacitor. The second high voltage winding region has a second separator. The second conductive plate is disposed inside the second separator. The second conductive plate and the second secondary winding form a second capacitor.

According to another embodiment of the present invention, the first separator plate, the second separator plate, the third separator plate, and the fourth separator plate are all disposed along the first direction, and the conductive plate is different from the first direction. Since the conductive plate and the first secondary winding form a first capacitor, the conductive plate and the second secondary winding form a second capacitor. Indeed, the second direction is perpendicular to the first direction.

According to another aspect of the present invention, a backlight device is provided. The backlight device includes a power supply module, a first lamp and a transformer. The transformer includes a bobbin, a primary winding, a secondary winding, and a conductive plate.

According to one embodiment of the present invention, the bobbin includes a low voltage winding region, a high voltage winding region and a first pin thereon. The primary winding is wound around the low voltage winding region. The primary winding is connected to the power module. The secondary winding is wound around the high voltage winding region. One end of the secondary winding is connected to the first pin. The first pin is defective with the first lamp of the backlight device. The high voltage winding region has a first separator. The conductive plate is disposed inside the first separator. The conductive plate and the secondary winding form a first capacitor.

According to another embodiment of the present invention, the first separation plate is disposed along a first direction, and the conductive plate is disposed along a second direction different from the first direction, so that the conductive plate and the secondary winding are capacitors. To form.

Another aspect of the present invention provides a backlight device. The backlight device includes a power supply module, a first lamp, a second lamp, and a transformer. The transformer includes a bobbin, a primary winding, a first secondary winding, a second secondary winding, a first conductive plate, and a second conductive plate.

According to one embodiment of the present invention, the bobbin has a low voltage winding region, a first high voltage winding region, a second high voltage winding region, and first and second pins thereon. The primary winding is wound around the low voltage winding region. The primary winding is connected to a power module. The first secondary winding is wound around the first high voltage winding region. One end of the first secondary winding is connected to the first pin. The first pin is connected to the first lamp of the backlight module. The second secondary winding is wound around the second high voltage winding region. One end of the second secondary winding is connected to the second pin. The second pin is connected to the second lamp of the backlight module. The first high voltage winding region has a first separator. The first conductive plate is disposed inside the first separator. The first conductive plate and the first secondary winding form a first capacitor. The second high voltage winding region has a second separator. The second conductive plate is disposed inside the second separator. The second conductive plate and the second secondary winding form a second capacitor.

According to another embodiment of the present invention, since the first separation plate is disposed along the first direction and the conductive plate is disposed along the second direction, the conductive plate and the first secondary winding form a first capacitor. The conductive plate and the second secondary winding form a second capacitor.

Advantages and spirit of the present invention will be understood by the following description in conjunction with the accompanying drawings.

Compared with the prior art, there is at least one conductive plate disposed in the bobbin of the transformer according to the embodiment of the backlight device of the present invention. There is a power storage effect between the secondary winding of the transformer and the conductive plate. The conductive plate may be connected to the high voltage side of the transformer and used as a protective capacitor in the backlight device circuit. Accordingly, the transformer and the backlight according to the present invention can be implemented in a circuit structure of low cost and compact size.

See FIG. 3. 3 is a schematic view showing a backlight device 3 and a transformer 34 adopted by the backlight device 3 according to the first embodiment of the present invention. As shown in FIG. 3, the backlight device 3 includes a power supply module 30, a lamp 32, and a transformer 34. Transformer 34 includes bobbin 340, primary winding 342, secondary winding 344, and the conductive plate (C). It should be noted that the transformer 34 of the present embodiment is not limited to this specific structure of the backlight device 3. Transformer 34 may be provided in cooperation with various kinds of backlight modules or in some other electronic devices in practical applications.

In practical applications, the body of transformer 34 is bobbin 340. Bobbin 340 is used to support the windings and receive the magnetic core. The bobbin can be made of an insulating material, for example nylon, polyethylene terephthalate (PET). In general, there may be some separators disposed on the bobbin 340 to define another winding area.

In this embodiment, the bobbin 340 has a low voltage winding region 3400, a high voltage winding region 3402, a pin PIN1, and another pin PIN2. The primary winding 342 is wound around the low voltage winding region 3400 and is connected to the power supply module 30. The secondary winding 344 is wound around the high voltage winding region 3402. One end of the secondary winding 344 is connected to the pin PIN1. The pin PIN1 is also connected to the lamp 32 of the backlight device 3.

There is a specific turns ratio between the primary winding 342 and the secondary windings 344. Based on electromagnetic induction, the primary winding 342 driven by the power supply module 30 induces the same magnetic lopp to the secondary winding 344, whereby the induced secondary winding 344 is a lamp ( Generate an induction output for driving 32). That is, the transformer 34 of the present embodiment may be a one-to-one transformer for driving one single load. In addition to this, the backlight device 3 of the present embodiment includes a single one-to-one transformer corresponding to the single lamp 32. In practical applications, the backlight device may include multiple transformers at the same time, to correspond to more lamps at once. In other words, the number of transformers in the backlight device is not limited to one. Many transformer structures are known to those skilled in the art.

As shown in FIG. 3, the high voltage region 3402 has a separator 3401. The conductive plate C1 is disposed in the separator plate 3401. The conductive plate C1 is coupled to the pin PIN2.

In practical applications, the conductive plate C1 is made of a conductive material, which may be metal. According to the theory of the plate capacitor, a parasitic capacitor may be formed between the conductive plate C1 and the secondary winding 344. The capacitance of the parasitic capacitor can be designed by adjusting the specification of the conductive plate C1. Accordingly, the parasitic capacitor formed between the conductive plate and the secondary winding of the transformer serves as an embedded capacitor to save additional cost and space for implementing an additional high voltage capacitor on the circuit board.

In the first embodiment, the pin PIN2 connected to the conductive plate C1 may be an open circuit as shown in FIG. 3. In practical application, pin PIN2 may also be connected to the components on the circuit board. In other words, pin PIN2 may be an input for other functions in the transformer. For example, pin PIN2 may be used for protection feedback function.

Referring to FIG. 4, FIG. 4 is a schematic view showing a backlight device 3 'and a transformer 34' adopted by the backlight device 3 'according to another embodiment of the present invention. The main difference between the backlight device 3 'and the backlight device of the first embodiment is that the backlight device 3' further comprises a passive component 36 'and a protective feedback circuit 38'. In this embodiment, rather than an open circuit, the pin PIN2 'is connected to the passive component 36' and the protection feedback circuit 38 '. As shown in FIG. 4, the pin PIN2 'connected to the passive component 36' is grounded through the passive component 36 '. The protection feedback circuit 38 'is electrically connected between the pin PIN2 and the passive component 36'.

The passive component 36 'may be a resistor, a capacitor or an inductor. Passive component 36 'is connected in series with a parasitic capacitor formed between conductive plate C1' and secondary winding 344 'in transformer 34' to form a voltage divider circuit. The voltage dividing output of the voltage dividing circuit can be designed by adjusting the size of the conductive plate C1 ', the distance between the conductive plates C1' or the exponent of the passive component 36 'on the circuit board. The voltage divider output of the voltage divider circuit is used to feed back to the input of the protective feedback circuit 38 'in order to achieve a protective function for the transformer circuit. The behavior of the voltage dividing circuit and the protective feedback circuit 38 'is similar to one of the feedback structure with the voltage dividing circuit including the high voltage capacitor of the prior art. The theory of prior art feedback structures is well known to those skilled in the art and will not be repeated here.

It should be noted that the backlight device 3 'does not require an additional high voltage capacitor on the circuit board. The transformer 34 'utilizes a conductive plate disposed in the separator on the high voltage side to form an embedded capacitor on the high voltage side of the transformer 34'. Thus, there is no need for additional space to implement additional high voltage capacitors on the circuit board.

See FIG. 5. 5 is a schematic view showing a backlight device 5 and a transformer 54 adopted by the backlight device 5 according to the second embodiment of the present invention. The main difference from the first embodiment is that the backlight device 5 of the second embodiment is a one-to-two backlight device designed to drive two lamps (lamp 52a and lamp 52b) at the same time. The transformer 54 of the backlight device 5 further includes a conductive plate C2. In other words, the transformer 54 includes a total of two conductive plates (that is, the conductive plate C1 and the conductive plate C2). As shown in FIG. 5, the conductive plate C2 is disposed in the separator plate 5622 in the high voltage winding region 5402.

In this embodiment, the bobbin 540 further includes a pin PIN3 and a pin PIN4. The pin PIN3 is electrically connected to one end of the secondary winding 544 and coupled to the lamp 52b. The conductive plate C2 is electrically connected to the pin PIN4. Pin PIN4 may be an open circuit as shown in FIG. 5, and in another embodiment, pin PIN4 may be further connected to the passive components of the backlight device and to the protection feedback circuit. In other words, pin PIN4 may serve as a voltage division input stage for the protection feedback structure. The connection pattern for the voltage dividing circuit and the other detailed structures of the backlight device 5 are similar to those of the above-described embodiment, and thus will not be described herein again.

Based on the above-described structure, the conductive plate C2 is arranged to form a parasitic capacitor with the secondary winding 544. This means that there are two conductive plates on the high voltage side of the transformer 54. The conductive plate C1 corresponds to the lamp 52a. The other conductive plate C2 corresponds to the lamp 52b. As a result, a backlight device 5 having a one-to-two transformer 54 and built-in protective capacitors is formed.

See FIG. 6. 6 is a schematic view showing a backlight device 7 according to a third embodiment of the present invention and a transformer 74 employed by the backlight device 7. This transformer 74 is a one to two transformer used to drive two lamps at the same time.

The backlight device 7 includes a power supply module 70, a lamp 72a, a lamp 72b, and a transformer 74. The transformer 74 includes a bobbin 740, a primary winding 742, a first secondary winding 744, a second secondary winding 746, a conductive plate C1, and a conductive plate C2.

In the present embodiment, the bobbin 740 includes the low voltage winding region 7400, the first high voltage winding region 7402, the second high voltage winding region 7404, the pin PIN1, the pin PIN2, the pin PIN3, It has a pin PIN4. Primary winding 742 is wound around low voltage winding region 7400. The primary winding 742 is connected to the power module 70.

The first secondary winding 744 is wound around the first high voltage winding region 7402. One end of the first secondary winding 744 is coupled to the pin PIN1. The pin PIN1 is connected to the lamp 72a of the backlight device 7.

The first high voltage winding region 7402 has a separator 7421. The conductive plate C1 is disposed inside the separator plate 74021. Pin PIN1 is coupled to lamp 72a. The conductive plate C1 is coupled to the pin PIN2. The conductive plate C1 may be made of a metal material. According to the theory of the capacitor, the first parasitic capacitor may be formed between the conductive plate C1 and the first secondary winding 744.

The second secondary winding 746 is wound around the second high voltage winding region 7404. One end of the second secondary winding 746 is connected to the pin PIN3. The pin PIN3 is connected to the lamp 72b of the backlight device 7.

The second high voltage winding region 7404 has a separator 74041. The conductive plate C2 is disposed inside the separator plate 74041. The conductive plate C2 may be made of a metal material. According to the theory of the capacitor, a second parasitic capacitor may be formed between the conductive plate C2 and the second secondary winding 746.

According to the above-described structure, on the high voltage side of the transformer 74, there are two conductive plates. The conductive plate C1 corresponds to the lamp 72a. The other conductive plate C2 corresponds to the lamp 72b. Thus, a backlight device 7 having a one-to-two transformer 74 and built-in protective capacitors is provided.

See FIG. 7. 7 is a schematic diagram showing a backlight device 9 according to a fourth embodiment of the present invention and a transformer 94 adopted by the backlight device 9. Compared with the third embodiment, this transformer 94 is a one-to-four transformer used to drive four lamps (lamp 92a, lamp 92b, lamp 92c, lamp 92d) at the same time.

Compared with the backlight device 7 of the third embodiment, the transformer 94 of the backlight device 9 further includes a conductive plate C3 and a conductive plate C4. In other words, the transformer 94 includes all four conductive plates. As shown in FIG. 7, the conductive plate C3 is disposed inside the separating plate 94022 on the first high voltage winding region 9402, and the conductive plate C4 is the separating plate on the second high voltage winding region 9504. 94042 is disposed inside. The other detailed structures of the backlight device 9 are similar to those of the above-described embodiment, and thus will not be described herein again.

In this embodiment, the conductive plate C3 is disposed to form a third parasitic capacitor corresponding to the lamp 92c, and the conductive plate C4 is formed to form a fourth parasitic capacitor corresponding to the lamp 92d. Is placed. In other words, on the high voltage side of the transformer 94, there are four conductive plates (conductive plate C1, conductive plate C2, conductive plate C3 and conductive plate C4), which are four loads (lamps). Four parasitic capacitors corresponding to 92a, lamp 92b, lamp 92c, and lamp 92d may be formed. As a result, a backlight device 9 having a one-to-four transformer 94 and built-in protective capacitors is formed.

See FIG. 8. 8 is a schematic diagram showing a backlight device 8 according to a fourth embodiment of the present invention and a transformer 84 employed by the backlight device 8. This transformer 84 is a 1 to 4 transformer used to drive four lamps (lamp 82a, lamp 82b, lamp 82c, lamp 82d) at the same time.

Compared to the backlight device 9 of the fourth embodiment, the separation plates 84021, 84022, 84041, and 84042 are all disposed along the first direction, but the conductive plate C1 has a second direction different from the first direction. Are arranged accordingly. In practice, the second direction may be perpendicular to the first direction, but is not limited thereto. The conductive plate C1 may cross each of the output terminals of the backlight device 9.

Since the conductive plate C1 is disposed close to the first secondary winding 844 and the second secondary winding 846, and the conductive plate C1 crosses the output terminals of the backlight device 9, the conductive plate C1 is provided. ) And the first secondary winding 844 may form a first parasitic capacitor, and the conductive plate C1 and the first secondary winding 844 may also form a second parasitic capacitor. Then, the conductive plate C1 is coupled to the third pin, the third pin is coupled to the first passive component and the first protective feedback circuit, the conductive plate is also coupled to the fourth pin, and the fourth pin is It can be coupled to a passive component and a second protective feedback circuit.

Compared with the prior art, there is at least one conductive plate inside the bobbin of the transformer according to the embodiment of the present invention. There is a power storage effect between the secondary winding of the transformer and the conductive plate. The conductive plate can be connected to the high voltage side of the transformer to act as a protective capacitor in the circuit of the backlight device. Accordingly, the transformer and the backlight device according to the present invention can be implemented in such a low cost and compact size circuit structure.

Together with the above embodiments and descriptions, the features and spirit of the present invention have been hopefully well described. Those skilled in the art will readily appreciate that numerous modifications and changes can be made while keeping to the teachings of the present invention. Accordingly, the foregoing is intended to be limited only by the scope and scope of the appended claims.

1 is a schematic view showing a backlight device according to the prior art.

FIG. 2 is a schematic diagram illustrating the backlight device and the transformer of FIG. 1.

3 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to the first embodiment of the present invention.

4 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to another embodiment of the present invention.

5 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to the second embodiment of the present invention.

6 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to the third embodiment of the present invention.

7 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to the fourth embodiment of the present invention.

8 is a schematic view showing a backlight device and a transformer adopted by the backlight device according to a fifth embodiment of the present invention.

Claims (29)

A bobbin comprising a high voltage winding region having a first separator and a first pin coupled thereon with a first lamp of the backlight module; A secondary winding wound around the high voltage winding region, one end of which is connected to the first pin; And A transformer suitable for a backlight module disposed inside the first separator and including a first conductive plate forming a first capacitor together with the secondary winding. The method of claim 1, wherein the bobbin further comprises a second pin, the first conductive plate is coupled to the second pin, the second pin is coupled to the passive component and the protective feedback circuit of the backlight module. Transformer suitable for backlight module. According to claim 1, further comprising a second conductive plate, the bobbin further comprises a third pin, the third pin is connected to the other end of the secondary winding, the third pin is the first Coupled to the second lamp, the high voltage winding region further has a second separator plate, the second conductive plate is disposed inside the second separator plate, and the second conductive plate and the secondary winding form a second capacitor. Transformer suitable for backlight module. 4. The bobbin of claim 3, wherein the bobbin further comprises a fourth pin, the second conductive plate is coupled to the fourth pin, and the fourth pin is coupled to a passive component and a protective feedback circuit of the backlight module. Transformer suitable for backlight module. A first high voltage winding region, a second high voltage winding region, and first and second pins thereon, wherein the first high voltage winding region has a first separator, and the second high voltage winding region is a second A bobbin having a separator, the first pin coupled to a first lamp of the backlight module, and the second pin coupled to a second lamp of the backlight module; A first secondary winding wound around the first high voltage winding region, one end of which is connected to the first pin; A second secondary winding wound around the second high voltage winding region, one end of which is connected to the second pin; A first conductive plate disposed inside the first separator and forming a first capacitor together with the first secondary winding; And A transformer suitable for a backlight module disposed in the second separator and forming a second conductive plate together with the second secondary winding to form a second capacitor. The method of claim 5, wherein the bobbin further comprises a third pin and a fourth pin, the first conductive plate is connected to the third pin, the third pin is a first passive component of the backlight module and Coupled to a first protective feedback circuit, wherein the second conductive plate is connected to the fourth pin, and the fourth pin is suitable for a backlight module coupled to a second passive component of the backlight module and a second protective feedback circuit. Transformers. According to claim 5, further comprising a third conductive plate and the fourth conductive plate, the bobbin further comprises a third pin and a fourth pin, the third pin is connected to the other end of the first secondary winding The third pin is coupled to a third lamp of the backlight module, the fourth pin is connected to the other end of the second secondary winding, and the fourth pin is coupled to a fourth lamp of the backlight module. The first high voltage winding region further has a third separator plate, the second high voltage winding region further has a fourth separator plate, the third conductive plate is disposed inside the third separator plate, and the third conductive plate is And the first secondary winding form a third capacitor, the fourth conductive plate is disposed inside the fourth separation plate, and the fourth conductive plate and the second secondary winding are suitable for a backlight module forming a fourth capacitor. Transformers. The method of claim 7, wherein the bobbin further comprises a fifth pin and a sixth pin, the third conductive plate is connected to the fifth pin, the fifth pin is a first passive component of the backlight module and Coupled to a first protective feedback circuit, the fourth conductive plate being connected to the sixth pin, the sixth pin being adapted to a backlight module coupled to a second passive component of the backlight module and a second protective feedback circuit. Transformers. Power module; A first lamp; And Including a transformer, The transformer is: A bobbin comprising a low voltage winding region, a high voltage winding region, and a first pin thereon, wherein the high voltage winding region has a first separator plate, the first pin coupled with the first lamp; A primary winding wound around the low voltage winding region and coupled to the power module; A secondary winding wound around the high voltage winding region and having one end connected to the first pin; And a first conductive plate disposed inside the first separator and forming a first capacitor together with the secondary winding. 10. The backlight device of claim 9, wherein the bobbin further comprises a second pin, the first conductive plate is connected to the second pin, and the second pin is coupled to a passive component and a protective feedback circuit. The method of claim 9, further comprising a second lamp, the transformer further comprises a second conductive plate, the bobbin further comprises a third pin, the third pin is connected to the other end of the secondary winding And the third pin is coupled to the second lamp, the high voltage winding region further has a second separator plate, the second conductive plate is disposed inside the second separator plate, and the second conductive plate is A backlight device forming a second capacitor together with the secondary winding. The backlight device of claim 11, wherein the bobbin further comprises a fourth pin, the second conductive plate is electrically connected to the fourth pin, and the fourth pin is coupled to a passive component and a protective feedback circuit. . Power module; A first lamp; A second lamp; And Including a transformer, The transformer is: A low voltage winding region, a first high voltage winding region, a second high voltage winding region, and first and second pins thereon, wherein the first high voltage winding region has a first separator and the second high voltage winding region Has a second separator plate, wherein the first pin is coupled to the first lamp, and the second pin is coupled to the second lamp; A primary winding wound around the low voltage winding region and coupled to the power module; A first secondary winding wound around the first high voltage winding region, one end of which is connected to the first pin; A second secondary winding wound around the second high voltage winding region, one end of which is connected to the second pin; A first conductive plate disposed inside the first separator and forming a first capacitor together with the first secondary winding; And The backlight device is disposed inside the second separator, and includes a first conductive layer to form a second capacitor together with the second secondary winding. 14. The bobbin of claim 13, wherein the bobbin further comprises a third pin and a fourth pin, wherein the first conductive plate is connected with the third pin, and the third pin is a first passive component and a first protective feedback. And a second conductive plate electrically coupled with the fourth pin, the fourth pin being coupled to a second passive component and a second protective feedback circuit. 14. The apparatus of claim 13, further comprising a third lamp and a fourth lamp, wherein the transformer further comprises a third conductive plate and a fourth conductive plate, wherein the bobbin further comprises a third pin and a fourth pin, The third pin is connected to the other end of the first secondary winding, the third pin is coupled to the third lamp, the fourth pin is connected to the other end of the second secondary winding, and the fourth pin is Coupled to the fourth lamp, the first high voltage winding region further has a third separator plate, the second high voltage winding region further has a fourth separator plate, and the third conductive plate is inside the third separator plate The third conductive plate forms a third capacitor together with the first secondary winding, and the fourth conductive plate is disposed inside the fourth separating plate, and the fourth conductive plate is connected to the second secondary winding. The backlight device to form a fourth capacitor together. The method of claim 15, wherein the bobbin further comprises a fifth pin and a sixth pin, wherein the third conductive plate is connected with the fifth pin, and the fifth pin is a first passive component and a first protective feedback. And a fourth conductive plate electrically coupled with the sixth pin, the sixth pin being coupled to a second passive component and a second protective feedback circuit. A high voltage winding region and a first pin thereon, wherein the high voltage winding region has a first separator plate, the first separator plate is arranged along a first direction, and the first pin is a first pin of the backlight module. Bobbin coupled with one lamp; A secondary winding wound around the high voltage winding region and having one end connected to the first pin; And And a conductive plate disposed along a second direction different from the first direction, the conductive plate forming a capacitor together with the secondary winding. 18. The transformer of claim 17, wherein the second direction is perpendicular to the first direction. The backlight module of claim 17, wherein the bobbin includes a second pin, the conductive plate is coupled to the second pin, and the second pin is connected to a passive component and a protection feedback circuit of the backlight module. Suitable transformer. A first high voltage winding region, a second high voltage winding region, and first and second pins thereon, wherein the first high voltage winding region has a first separator, and the second high voltage winding region is a second The first separation plate and the second separation plate are disposed in a first direction, the first pin is coupled to the first lamp of the backlight module, and the second pin is formed of the backlight module. Bobbin to combine with two lamps; A first secondary winding wound around the first high voltage winding region, one end of which is connected to the first pin; A second secondary winding wound around the second high voltage winding region, one end of which is connected to the second pin; And And a conductive plate disposed along a second direction different from the first direction, the conductive plate forming a first capacitor together with the first secondary winding. 21. The transformer of claim 20, wherein said second direction is perpendicular to said first direction. 21. The method of claim 20, wherein the bobbin further comprises a third pin and a fourth pin, the conductive plate is connected to the third pin, the third pin is a first passive component and a first passive component of the backlight module A transformer coupled to a protective feedback circuit, the conductive plate further connected with the fourth pin, the fourth pin coupled to a second passive component of the backlight module and a second protective feedback circuit. 21. The method of claim 20, wherein the bobbin further comprises a third pin and a fourth pin, the third pin is connected to the other end of the first secondary winding, the third pin is coupled to the third lamp of the backlight module And a fourth pin is connected to the other end of the second secondary winding, the fourth pin is coupled to a fourth lamp of the backlight module, and the first high voltage winding region further includes a third separator, and the second high voltage The winding area further includes a fourth separator, wherein the third separator and the fourth separator are disposed in a first direction, and the conductive plate forms a second capacitor together with the second secondary winding. Suitable for transformer. Power module; A first lamp; And Including a transformer, The transformer is: A low voltage winding region, a high voltage winding region, and a first pin thereon, wherein the high voltage winding region has a first separator, the first separator being disposed along a first direction, the first pin being the A bobbin coupled with the first lamp; A primary winding wound around the low voltage winding region and coupled to the power module; A secondary winding wound around the high voltage winding region and having one end connected to the first pin; And And a conductive plate disposed along a second direction different from the first direction and forming a capacitor together with the secondary winding. The backlight device of claim 24, wherein the second direction is perpendicular to the first direction. 25. The backlight device of claim 24, wherein the bobbin further comprises a second pin, the conductive plate is connected to the second pin, and the second pin is connected to a passive component and a protective feedback circuit. Power module; A first lamp; A second lamp; And Including a transformer, The transformer is: A low voltage winding region, a first high voltage winding region, a second high voltage winding region, and first and second pins thereon, wherein the first high voltage winding region has a first separator plate; A bobbin disposed along a first direction, the second high voltage winding region having a second separator, the first pin coupled to the first lamp, and the second pin coupled to the second lamp; A primary winding wound around the low voltage winding region and coupled to the power module; A first secondary winding wound around the first high voltage winding region, one end of which is connected to the first pin; A second secondary winding wound around the second high voltage winding region, one end of which is connected to the second pin; And The backlight device is disposed in a second direction and forms a first capacitor together with the first secondary winding, and forms a second capacitor together with the second secondary winding. The backlight device of claim 27, wherein the second direction is perpendicular to the first direction. 28. The device of claim 27, wherein the bobbin further comprises a third pin and a fourth pin, wherein the conductive plate is connected to the third pin, and the third pin is connected to the first passive component and the first protective feedback circuit. And the conductive plate is also connected to the fourth pin, wherein the fourth pin is connected to a second passive component and a second protective feedback circuit.

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