Transformer

Abstract

A transformer according to an embodiment comprises: a coil part including a primary coil and a secondary coil spaced apart from the primary coil; a core part including an upper core supported on the top surface of the coil part and a lower core supported on the bottom surface of the coil part; and a bobbin accommodating both end portions of the coil part.

Description

Transformers

[0001] The present invention relates to a transformer.

[0002] In general, driving power is required to drive an electronic device, and a power supply unit, such as a power supply unit (PSU), is essential to supply this driving power to the electronic device.

[0003] In particular, in display devices such as flat-panel TVs, slimming is required along with larger display sizes, so there is a challenge of reducing thickness while satisfying the increased power consumption of larger displays.

[0004] In power supply units (PSUs), transformers occupy a relatively large volume compared to other components. Therefore, slimming solutions typically involve omitting or controlling the number of elements that contribute significantly to the thickness of the transformer. For example, the transformers that make up the power supply units of recent flat panel displays often incorporate multiple, slim transformers with low capacitance.

[0005] In particular, for large-capacity transformers used in large TVs exceeding 500W (watts), the core size has increased compared to the past, which may cause an imbalance in the thickness of the back surface or damage to the core after heat treatment for core molding. This may cause heat generation during operation of the transformer, ultimately leading to a decrease in transformer efficiency. Furthermore, depending on the shape of the secondary coil, the amount of heat generated in the transformer may increase and the cotton yarn may be damaged.

[0006] The technical problem to be solved by the present invention is to provide a transformer having excellent heat generation characteristics by being slim and being able to quickly discharge the heat of the coil to the outside.

[0007] Another technical problem that the present invention seeks to solve is to provide a display device to which the above-described transformer is applied.

[0008] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] A transformer according to one embodiment may include a coil portion including a primary coil and a secondary coil arranged spaced apart from the primary coil; a core portion including an upper core supported on an upper surface of the coil portion and a lower core supported on a lower surface of the coil portion; and a bobbin receiving both ends of the coil portion.

[0010] For example, the upper core may include first and second upper cores divided in a first direction, and the lower core may include first and second lower cores divided in the first direction.

[0011] For example, the first direction may be parallel to the longitudinal direction of the bobbin.

[0012] For example, the bobbin may include a central portion including a hollow portion for accommodating the core portion, a first portion for accommodating one of the opposite ends of the coil portion, and a second portion for accommodating the other of the opposite ends of the coil portion and being on the opposite side of the first portion in a first direction with the hollow portion therebetween; a first terminal portion coupled to the first portion and including a first terminal connected to the secondary coil; a second terminal portion coupled to the second portion and including a second terminal connected to the primary coil, the second terminal portion being on the opposite side of the first terminal portion in the first direction; a first mounting support portion disposed inside the first terminal portion and supporting one end of the secondary coil; and a second mounting support portion disposed inside the second terminal portion and supporting the other end of the secondary coil.

[0013] For example, the first anchoring support may include first and second support plates spaced apart from each other in a second direction intersecting the first direction, the secondary coil may include an upper turn and a lower turn, one end of the lower turn of the secondary coil may be disposed between the first support plate and the second support plate, and one end of the upper turn of the secondary coil may be disposed between the second support plate and the first portion.

[0014] For example, the second support plate may further include a guide groove that guides one end of the upper turn of the secondary coil to the lower turn.

[0015] For example, each of the first and second anchoring supports may further include a guide portion defining a space in which the primary coil is placed.

[0016] For example, the guide portion of the second anchoring support portion can determine the degree of bending of the other end of the secondary coil.

[0017] For example, the second anchoring support may include third and fourth support plates spaced apart from each other in a second direction intersecting the first direction, and the other end of the lower turn of the secondary coil may be disposed between the third support plate and the fourth support plate, and the other end of the upper turn of the secondary coil may be disposed between the fourth support plate and the second portion.

[0018] For example, in the direction in which the upper core and the lower core face each other, the thickness of the frame defining the hollow in the central portion may be less than or equal to the distance from the upper surface of the upper core to the bottom surface of the lower core.

[0019] For example, the first upper core includes a first side facing the second upper core in the first direction, the second upper core includes a second side facing the first side in the first direction, the first lower core includes a third side facing the second lower core in the first direction, and the second lower core includes a fourth side facing the third side in the first direction, and the first side and the second side can be joined to each other by a first insulating adhesive, and the third side and the fourth side can be joined to each other by a second insulating adhesive.

[0020] For example, the primary coil may have a lumpy, planar shape.

[0021] For example, each of the first and second upper cores may include a first outer portion protruding in a second direction intersecting the first direction and extending along the first direction; a second outer portion spaced apart from the first outer portion in a third direction intersecting the first and second directions, respectively, and protruding in the second direction and extending along the first direction; and a first midfoot portion protruding between the first outer portion and the second outer portion in the second direction and extending in the first direction, and each of the first and second lower cores may include a third outer portion protruding toward the first outer portion in the second direction and extending along the first direction; a fourth outer portion spaced apart from the third outer portion in the third direction, protruding toward the second outer portion in the second direction and extending along the first direction; and a second midfoot portion protruding toward the first midfoot portion between the third outer portion and the fourth outer portion in the second direction and extending in the first direction.

[0022] For example, the upper surface of the coil portion may be arranged to contact the inner surface of each of the first and second upper cores between the first outer portion and the second outer portion and the first middle portion, respectively, and the lower surface of the coil portion may include a lower surface arranged to contact the inner surface of each of the first and second lower cores between the third outer portion and the fourth outer portion and the second middle portion, respectively.

[0023] For example, the primary coil may include a plurality of wires, each of which includes a conductor and a first insulating portion wrapping the conductor; and a second insulating portion having a predetermined winding form wrapping the plurality of wires and supporting the core portion.

[0024] A display device according to another embodiment may include a transformer; and a circuit board on which the transformer is arranged.

[0025] The above aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by a person having ordinary skill in the art based on the detailed description of the present invention described below.

[0026] The present invention described above has the effects of having a thinner thickness in the vertical direction, excellent heat generation characteristics, a high manufacturing yield of the core portion, better electrical insulation between the windings of the coil portion and the core portion, and uniformity of the overall thickness of the transformer.

[0027] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention pertains from the description below.

[0028] Figure 1 shows a top perspective view of a transformer according to an embodiment.

[0029] Figure 2 shows a perspective view of the combined transformer shown in Figure 1, turned over.

[0030] Figure 3 shows a plan view of the transformer illustrated in Figure 1.

[0031] Figure 4 shows a bottom view of the transformer shown in Figure 3, turned over.

[0032] Figure 5 shows an exploded top perspective view of the transformer illustrated in Figure 1 as viewed from the left.

[0033] Figure 6 shows a bottom exploded perspective view of the transformer shown in Figure 5, turned over.

[0034] Figure 7 shows an exploded perspective view of the upper part of the transformer shown in Figure 1 as viewed from the right side.

[0035] Figure 8 shows a bottom exploded perspective view of the transformer illustrated in Figure 7, turned over.

[0036] Figure 9 shows a front view of the transformer illustrated in Figure 1.

[0037] Figure 10 shows a rear view of the transformer illustrated in Figure 1.

[0038] Figure 11 shows a top perspective view of the transformer illustrated in Figure 1 with the upper core disassembled.

[0039] Figure 12 shows a bottom perspective view of the transformer illustrated in Figure 1 with the lower core disassembled.

[0040] Figure 13 shows a top perspective view of the transformer illustrated in Figure 11 with the upper core, lower core, and central portion removed.

[0041] Figure 14 shows a bottom perspective view of the transformer shown in Figure 13, turned over.

[0042] Figure 15 shows a top perspective view of the transformer illustrated in Figure 13 with the secondary coil further removed.

[0043] Figure 16 shows a top perspective view of the transformer illustrated in Figure 15 with the primary coil further removed.

[0044] Figure 17 shows a bottom perspective view of the transformer shown in Figure 16, turned over.

[0045] Fig. 18 shows a front view of the transformer illustrated in Fig. 1 with the first terminal portion of the bobbin removed.

[0046] Fig. 19 shows a rear view of the transformer illustrated in Fig. 1 with the second terminal portion removed.

[0047] Figure 20 shows an exploded perspective view of the second terminal portion and the second fixing support portion.

[0048] Figure 21 shows an exploded perspective view of the second terminal portion and the second fixing support portion shown in Figure 20, turned over.

[0049] Fig. 22 shows a perspective view of the combination of the second terminal portion and the second fixing support portion shown in Fig. 20.

[0050] Fig. 23 shows a front view of the second terminal portion and the second fixing support portion shown in Fig. 22.

[0051] Figure 24 shows an exploded perspective view of the first terminal portion and the first fixing support portion.

[0052] Fig. 25 shows an exploded perspective view of the first terminal portion and the first fixing support portion shown in Fig. 24, turned over.

[0053] Fig. 26 shows a perspective view of the combination of the first terminal portion and the first fixing support portion shown in Fig. 24.

[0054] Fig. 27 shows a front view of the first terminal portion and the first fixing support portion shown in Fig. 26.

[0055] Figure 28 shows a cross-sectional view taken along the line I-I' shown in Figure 3.

[0056] Fig. 29 shows a cross-sectional view of a core portion and a primary coil according to an embodiment.

[0057] Fig. 30 shows a perspective view of the coil portion and the first and second mounting supports in the transformer illustrated in Fig. 1, viewed from the side.

[0058] Fig. 31 shows a perspective view of the coil portion and the first and second mounting supports in the transformer illustrated in Fig. 1, viewed from the front.

[0059] The present invention is susceptible to various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention.

[0060] Terms including ordinal numbers, such as "second," "first," etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a second component may be referred to as a "first component," and similarly, a first component may also be referred to as a "second component." The term "and / or" includes a combination of multiple related items described herein or any of multiple related items described herein.

[0061] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0062] In the description of the embodiments, the description that each layer (film), region, pattern or structure is formed "on" or "under" the substrate, each layer (film), region, pad or pattern includes both being formed directly or through the interposition of another layer. The reference to "on" or "under" each layer is explained based on the drawings. In addition, the thickness or size of each layer (film), region, pattern or structure in the drawings may be modified for clarity and convenience of explanation, and therefore does not entirely reflect the actual size.

[0063] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0064] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0065] Hereinafter, embodiments will be described in detail with reference to the attached drawings, and components that are the same or corresponding will be given the same reference numerals regardless of the drawing symbols, and redundant descriptions thereof will be omitted. In addition, although the embodiments are described using a Cartesian coordinate system, it goes without saying that the embodiments may be described using other coordinate systems. In the Cartesian coordinate system, the x-axis, the y-axis, and the z-axis shown in each drawing are orthogonal to each other, but the embodiments are not limited thereto. The x-axis, the y-axis, and the z-axis may intersect each other. For convenience of description, the x-axis direction is referred to as a 'first direction', the z-axis direction is referred to as a 'second direction', and the y-axis direction is referred to as a 'third direction'. In addition, the x-axis direction or the y-axis direction may be referred to as a horizontal direction, and one of the x-axis direction and the y-axis direction may be referred to as a first horizontal direction, and the other of the x-axis direction and the y-axis direction may be referred to as a second horizontal direction.

[0066] Hereinafter, a transformer according to the present embodiment will be described in detail with reference to the attached drawings.

[0067] FIG. 1 shows a top perspective view of a transformer according to an embodiment, FIG. 2 shows a top perspective view of the transformer shown in FIG. 1 when turned over, FIG. 3 shows a top view of the transformer shown in FIG. 1, FIG. 4 shows a bottom perspective view of the transformer shown in FIG. 3 when turned over, FIG. 5 shows an upper exploded perspective view of the transformer shown in FIG. 1 when viewed from the left side (i.e., in the +y-axis direction), FIG. 6 shows a bottom exploded perspective view of the transformer shown in FIG. 5 when turned over, FIG. 7 shows an upper exploded perspective view of the transformer shown in FIG. 1 when viewed from the right side (i.e., in the -y-axis direction), FIG. 8 shows a bottom exploded perspective view of the transformer shown in FIG. 7 when turned over, FIG. 9 shows a front view of the transformer shown in FIG. 1, FIG. 10 shows a back view of the transformer shown in FIG. 1, and FIG. 11 shows an upper core (110) in the transformer shown in FIG. 1. FIG. 12 shows an exploded upper perspective view of the transformer shown in FIG. 1 with the lower core (120) exploded, FIG. 13 shows an upper perspective view of the transformer shown in FIG. 11 with the upper core (110), the lower core (120) and the central portion (310) removed, FIG. 14 shows a bottom perspective view of the transformer shown in FIG. 13 with the transformer turned over, FIG. 15 shows an upper perspective view of the transformer shown in FIG. 13 with the secondary coil (220) further removed, FIG. 16 shows an upper perspective view of the transformer shown in FIG. 15 with the primary coil (210) further removed, FIG. 17 shows a bottom perspective view of the transformer shown in FIG. 16 with the transformer turned over, FIG. 18 shows a front view of the transformer shown in FIG. 1 with the first terminal portion (320) of the bobbin (300) removed, and FIG. 19 shows a top perspective view of the transformer shown in FIG. 1 with the transformer The rear view of the transformer with the second terminal portion (330) removed is shown, and Fig. 20 shows an exploded perspective view of the second terminal portion (330) and the second fixing support portion (350).FIG. 21 shows an exploded perspective view of the second terminal portion (330) and the second fixing support portion (350) shown in FIG. 20, turned over, FIG. 22 shows a combined perspective view of the second terminal portion (330) and the second fixing support portion (350) shown in FIG. 20, FIG. 23 shows a front view of the second terminal portion (330) and the second fixing support portion (350) shown in FIG. 22, FIG. 24 shows an exploded perspective view of the first terminal portion (320) and the first fixing support portion (340), FIG. 25 shows an exploded perspective view of the first terminal portion (320) and the first fixing support portion (340) shown in FIG. 24, FIG. 26 shows a combined perspective view of the first terminal portion (320) and the first fixing support portion (340) shown in FIG. 24, and FIG. 27 shows a combined perspective view of the first terminal portion (320) and the first fixing support portion (340) shown in FIG. 26. A front view of the terminal portion (320) and the first fixing support portion (340) is shown, and FIG. 28 shows a cross-sectional view taken along the line I-I' shown in FIG. 3.

[0068] A transformer according to an embodiment may include a core portion (100), a coil portion (200), and a bobbin (part) (300).

[0069] The core portion (100) has the characteristics of a magnetic circuit and can act as a path for magnetic flux. The core portion (100) can include an upper core (110) and a lower core (120). Each of the upper core (110) and the lower core (120) can be divided in a first direction, and when the upper core (110) and the lower core (120) are combined, one core portion (100) can be formed.

[0070] The upper core (110) may include first and second upper cores divided in the first direction, and the lower core (120) may include first and second lower cores divided in the first direction.

[0071] Additionally, according to an embodiment, the horizontal direction (e.g., the first direction) in which each of the upper core (110) and the lower core (120) is divided may be parallel to the long axis direction of the bobbin (300).

[0072] Also, referring to FIG. 7, the first upper core may include a first side (S1) facing the second upper core in the first direction, the second upper core may include a second side (S2) facing the first side (S1) in the first direction, the first lower core may include a third side (S3) facing the second lower core in the first direction, and the second lower core may include a fourth side (S4) facing the third side (S3) in the first direction.

[0073] The first side (S1) and the second side (S2) can be adhesively bonded to each other by a first insulating adhesive (115), and the third side (S3) and the fourth side (S4) can be adhesively bonded to each other by a second insulating adhesive (125).

[0074] The lower core (120) may be arranged to face the upper core (110) in the second direction. At this time, the upper core (110) may be defined as the core located furthest from the upper surface of the circuit board in the second direction, and the lower core (120) may be defined as the core located closest to the upper surface of the circuit board in the second direction. The upper core (110) and the lower core (120) may have shapes that are symmetrical with respect to each other vertically, i.e., in the z-axis direction, or may have asymmetric shapes. However, in the following description, it is assumed that they have shapes that are symmetrical with respect to each other vertically for the convenience of explanation.

[0075] Referring to FIG. 6, each of the first and second upper cores (110) may include a first outer foot portion (111), a second outer foot portion (112), and a first middle foot portion (113).

[0076] The first outer leg portion (111) may be arranged to protrude downwardly in the second direction from one side of each of the first and second upper cores in the third direction and extend along the first direction. In addition, the second outer leg portion (112) may be arranged to be spaced apart from the first outer leg portion (111) in the third direction and protrude downwardly in the second direction and extend along the first direction. In addition, the first midfoot portion (113) may be arranged to protrude downwardly in the second direction between the first outer leg portion (111) and the second outer leg portion (112) and extend along the first direction. The first outer leg portion (111), the second outer leg portion (112), and the first midfoot portion (113) may be arranged to be parallel to each other. In addition, the widths of the first outer leg portion (111), the second outer leg portion (112), and the first midfoot portion (113) in the third direction may be the same or different.

[0077] Meanwhile, the first and second lower cores, which are the lower cores (120), are opposed to the first and second upper cores, respectively, and each of the first and second lower cores may include a third outer foot portion (121), a fourth outer foot portion (122), and a second middle foot portion (123).

[0078] The third outer leg portion (121) may be arranged to protrude downwardly in the second direction from one side of each of the first and second lower cores in the third direction and extend along the first direction. In addition, the fourth outer leg portion (122) may be arranged to be spaced apart from the third outer leg portion (121) in the third direction and protrude downwardly in the second direction and extend along the first direction. In addition, the second midfoot portion (123) may be arranged to protrude downwardly in the second direction between the third outer leg portion (121) and the fourth outer leg portion (122) and extend along the first direction. The third outer leg portion (121), the fourth outer leg portion (122), and the second midfoot portion (123) may be arranged to be parallel to each other. In addition, the widths of the third outer leg portion (121), the fourth outer leg portion (132), and the second midfoot portion (123) in the third direction may be the same or different.

[0079] According to an embodiment, the core part (100) is supported by the coil part (200). Therefore, the upper surface (e.g., 210U illustrated in FIG. 5) of the coil part (200) may be arranged with or without contacting the first inner surfaces (IS1, IS2 illustrated in FIG. 8) of each of the first and second upper cores between the first outer portion (111) and the second outer portion (112) and the first midfoot portion (113), respectively. In addition, the lower surface (e.g., 210L illustrated in FIG. 6) of the coil part (200) may be arranged with or without contacting the second inner surfaces (IS3, IS4 illustrated in FIG. 7) of each of the first and second lower cores between the third outer portion (121) and the fourth outer portion (122) and the second midfoot portion (123), respectively.

[0080] For example, the first and second midfoot portions (113, 123) may have a rectangular shape as illustrated or an oval planar shape, as illustrated, but the embodiment is not limited to a specific shape of the first and second midfoot portions (113, 123).

[0081] Referring to FIG. 6, the core portion (100) may further include a first space (130) and a second space (140). The first space (130) is defined by the first outer portion (111), the first midfoot portion (113), the third outer portion (121), and the second midfoot portion (123), and may accommodate a portion of the coil portion (200) described later, that is, the primary coil (210) and the secondary coil (220). The second space (140) is defined by the second outer portion (112), the first midfoot portion (113), the fourth outer portion (122), and the second midfoot portion (123), and may accommodate a portion of the primary coil (210) and the secondary coil (220) of the coil portion (200) described later, which is disposed on the opposite side of the y-axis. Accordingly, the first space (130) and the second space (140) can be formed to correspond to the thickness and spacing of a part and the other part of the coil part (200) accommodated therein (130, 140). By adjusting the size of the first space (130) and the second space (140), the inductance of the core part (100) can be controlled, and the heat generation of the transformer can be controlled depending on the number of the first space (130) and the second space (140).

[0082] The core (100) may include a magnetic material, for example, iron or ferrite, but is not necessarily limited thereto. In particular, the core (100) may be implemented using a material with excellent thermal conductivity properties.

[0083] According to an embodiment, the upper core (110) may be supported by being in contact with the upper surface of the coil portion (200), and the lower core (120) may be supported by being in contact with the lower surface of the coil portion (200). That is, a bobbin is not arranged between the upper core (110) and the coil portion (200), and a bobbin is not arranged between the lower core (120) and the coil portion (200). Therefore, the core portion (100) is supported by the coil portion (200).

[0084] Meanwhile, the coil section (200) may include a primary coil (210) and a secondary coil (220).

[0085] As shown in FIGS. 11 to 14, a part of the primary coil (210) may be placed within the core portion (100), and the other part of the primary coil (210) may be placed outside the core portion (100).

[0086] According to an embodiment, in order to support the core portion (100), the primary coil (210) may have a lumpy, planar shape. Accordingly, the first and second upper cores (110) may be supported by the upper surface (210U) of the primary coil (210), and the first and second lower cores (120) may be supported by the lower surface (210L) of the primary coil (210). In addition, the first and second upper cores (110) are also supported by the secondary coil (220).

[0087] According to an embodiment, the primary coil (210) may have a lumpy flat shape.

[0088] Fig. 29 shows a cross-sectional view of a core portion (110, 120) and a primary coil (210A) according to an embodiment. The primary coil (210A) corresponds to the embodiment of the primary coil (210) described above.

[0089] The primary coil (210A) may have a cross-sectional shape including a plurality of wires (W). In the case of FIG. 29, ten wires (W) are illustrated, but the number of wires (W) may be greater or less than the number illustrated.

[0090] According to an embodiment, the primary coil (210A) may include a plurality of wires (W) and a second insulator (230). Each of the plurality of wires (W) illustrated in FIG. 29 may include a conductor (212) and a first insulator (214).

[0091] The conductor (212) has electrical conductivity and may include a material having electrical conductivity, for example, copper. That is, the conductor (212) corresponds to the core of the wire (W). As illustrated, the conductor (212) may have a circular cross-sectional shape with a radius (R), but the embodiment is not limited to a specific cross-sectional shape of the conductor (212).

[0092] The first insulating portion (214) may be an insulating coating that surrounds the conductor (212). For example, the first insulating portion (214) may be a double insulating layer including first and second insulating coating layers (214-1, 214-2) laminated in multiple layers (e.g., double) as illustrated in FIG. 29. The second insulating coating layer (214-2) may be disposed in contact with the conductor (212), and the first insulating coating layer (214-1) may be disposed on the outermost side of the wire (W).

[0093] The second insulating portion (230) may be formed to have a certain winding form so as to support the core portion (100) while wrapping a plurality of wires (W). Accordingly, the upper core (110) may be supported by the upper surface (210U) of the primary coil (210A), and the lower core (120) may be supported by the lower surface (210L) of the primary coil (210A).

[0094] The second insulating portion (230) may include a material having adhesive and insulating properties. For example, the second insulating portion (230) may be formed of a polymer resin, such as a polyvinyl resin, a polyethylene resin, a fluorine resin, a silicone resin, or nylon. Accordingly, a plurality of wires (W) may be coupled to each other by the second insulating portion (230).

[0095] In addition, the secondary coil (220) is arranged spaced apart from the primary coil (210) and is arranged along the outer circumference of the primary coil (210) in the winding direction of the primary coil (210), so that at least a part of the secondary coil (220) can be accommodated in the first space (130) and the second space (140) together with the primary coil (210). The secondary coil (220) may be wound by arranging at least one secondary winding in a single layer or multiple layers. For example, as illustrated, the secondary coil (220) may be arranged in multiple layers by turning one winding multiple times (for example, 2 turns or 3 turns). Hereinafter, in the secondary coil (220) in which one winding is made into 2 turns, the upper winding is referred to as an 'upper turn' or 'upper coil', and the winding located below the upper turn is referred to as a 'lower turn' or 'lower coil'.

[0096] In addition, according to an embodiment, in order to realize a center tap structure, the secondary winding (220) may have a totem pole structure. As illustrated in FIG. 5, when three wires form one winding, one end of the secondary coil (220) may include four windings (WS1, WS2, WS3, WS4). In this case, the totem pole structure means that when the first winding (WS1) is connected to the negative (-) terminal of the power source and the fourth winding (WS4) is connected to the positive (+) terminal of the power source, the second and third windings (WS2, WS3) are each grounded, and the second and third windings (WS2, WS3) are coupled together on a substrate (not shown). As a result, the current flow of the two windings becomes the same, so that efficiency can be improved.

[0097] In particular, according to the embodiment, as shown in FIGS. 11 and 12, the secondary coil (220) also serves to support the core portion (100) together with the primary coil (210).

[0098] Meanwhile, the bobbin (300) serves to accommodate both ends of the coil portion (200). According to an embodiment, the bobbin (300) may include a central portion (310), a first terminal portion (320), a second terminal portion (330), a first mounting support portion (340), and a second mounting support portion (350).

[0099] The bobbin (300) can be combined with the core portion (100) and the coil portion (200). In addition, at least a portion of the primary coil (210) and the secondary coil (220) can be placed on the bobbin (300).

[0100] First, referring to FIG. 5, the central portion (310) may include a first portion (or first end) (P1) arranged on one side of the central portion (310), a second portion (or second end) (P2) arranged on the other side opposite the one side in the first direction, and a hollow portion (310H) (or through hole) arranged between the first portion (P1) and the second portion (P2) and accommodating the core portion (100).

[0101] In the central portion (310), the first and second portions (P1, P2) do not overlap in the second direction, which is perpendicular to the core portion (100), and, in detail, are portions extending from the hollow portion (310H) in the positive first direction and the negative first direction, respectively. In this way, the first and second portions (P1, P2) are defined as regions arranged on opposite sides in the first direction with the hollow portion (310H) interposed therebetween.

[0102] Referring to FIGS. 3 and 4, the first part (P1) is a part that receives one end of both ends of the coil part (200), and the second part (P2) is a part that receives the other end of both ends of the coil part (200).

[0103] The first terminal portion (320) is coupled to the first part (P1) of the central portion (310) and may include a terminal (or pin) (hereinafter referred to as “first terminal”) (T1) connected to the secondary coil (220).

[0104] The second terminal portion (330) may be coupled with the second portion (P2) of the central portion (310) and may include a terminal (hereinafter referred to as the “second terminal”) (T2) connected to the primary coil (210). The first terminal portion (320) and the second terminal portion (330) are positioned on opposite sides in the first direction.

[0105] For example, as described above, when one end of the secondary coil (220) includes four windings (WS1, WS2, WS3, WS4), the first terminal (T1) may include four terminals (T11, T12, T13, T14), but the embodiment is not limited to a specific number or shape of terminals included in the first terminal (T1). At this time, the second terminal (T2) may include two terminals (T21, T22), but the embodiment is not limited to a specific number or shape of the second terminal (T2).

[0106] Each of the first terminal portion (320) and the second terminal portion (330) can be coupled to the central portion (310) in various ways.

[0107] As an example, referring to FIGS. 24 and 25, the first terminal portion (320) may include first to fourth grooves (H11, H12, H13, H14), and as illustrated in FIG. 5, the central portion (310) may include first and second coupling portions (310P1 and 310P2). As illustrated in FIG. 5, each of the first and second coupling portions (310P1 and 310P2) may have a stepped structure and may include a protrusion (310PT) formed on the stepped surface. At this time, the stepped portions of the first and second coupling portions (310P1 and 310P2) may have a shape suitable for sliding into the first and third grooves (H13, H14), respectively, and being introduced in the first direction. When the stepped portions of the first-first and first-second connecting portions (310P1 and 310P2) are inserted into the first-third and first-fourth grooves (H13, H14), respectively, the protrusions (310PT) of each of the first-first and first-second connecting portions (310P1, 310P2) are fitted into the first-first and first-second grooves (H11, H12), so that the first terminal portion (320) can be coupled with the central portion (310).

[0108] In addition, the second terminal portion (330) may be fastened to the central portion (310) in the same manner as the first terminal portion (320) and the central portion (310) are fastened. That is, referring to FIGS. 20 and 21, the second terminal portion (330) may include the 2-1 to 2-4 grooves (H21, H22, H23, H24), and as illustrated in FIG. 5, the central portion (310) may include the 1-3 and 1-4 connecting portions (310P3 and 310P4). In the same manner as the 1-1 and 1-2 connecting portions (310P1 and 310P2) illustrated in FIG. 5, each of the 1-3 and 1-4 connecting portions (310P3 and 310P4) may have a step structure and may include a protrusion (310PT) formed on the step surface. In this case, the stepped portions of the 1-3rd and 1-4th connecting portions (310P3 and 310P4) may have a shape suitable for sliding into the 2-3rd and 2-4th grooves (H23, H24), respectively, and being inserted in the first direction. When the stepped portions of the 1-3rd and 1-4th connecting portions (310P3 and 310P4) are inserted into the 2-3rd and 2-4th grooves (H23, H24), respectively, the protrusions (310PT) of each of the 1-3rd and 1-4th connecting portions (310P3, 310P4) are fitted into the 2-1st and 2-2nd grooves (H21, H22), so that the second terminal portion (330) can be coupled with the central portion (310).

[0109] The above coupling method is an example, and the embodiment is not limited to a specific coupling method of each of the first and second terminal portions (320, 330) and the central portion (310).

[0110] In addition, referring to FIGS. 3 and 4, the first terminal portion (320) may further include a first inner guide portion (324), and the second terminal portion (330) may further include a second inner guide portion (334). The first inner guide portion (324) distinguishes between the upper and lower turns of one end of the secondary coil (220), and the second inner guide portion (334) distinguishes between the upper and lower turns of the other end of the secondary coil (220), thereby guiding the secondary coil (220) to maintain a multi-layer structure. To this end, each of the first and second inner guide portions (324, 334) may have a shape that protrudes toward the secondary coil (220). In some cases, the first and second inner guide portions (324, 334) may be omitted.

[0111] In addition, referring to FIG. 9, the first terminal portion (320) may further include third-first to third-fourth grooves (H31, H32, H33, H34). The third-first to third-fourth grooves (H31, H32, H33, H34) are portions where the first to fourth windings (WS1, WS2, WS3, WS4) are respectively discharged to the outside for soldering. That is, the first to fourth windings (WS1, WS2, WS3, WS4) may be separated from each other by the third-first to third-fourth grooves (H31, H32, H33, H34) and may respectively be discharged to the outside.

[0112] Referring to FIG. 10, the second terminal portion (330) may further include 4-1 to 4-4 grooves (H41, H42, H43, H44). At least some of the 4-1 to 4-4 grooves (H41, H42, H43, H44) are portions through which the primary coil (210) flows outward for soldering. That is, the primary coil (210) may be separated from each other by at least one of the 4-1 to 4-4 grooves (H41, H42, H43, H44) and may flow outward respectively.

[0113] In some cases, the 3rd to 4th grooves (H31 to H44) may be omitted.

[0114] Meanwhile, the first anchoring support (340) is arranged on the inside of the first terminal portion (320) to support one end of the secondary coil (220), and the second anchoring support (350) is arranged on the inside of the second terminal portion (330) to support the other end of the secondary coil (220).

[0115] According to an embodiment, referring to FIGS. 24 to 27, the first anchoring support member (340) may include first and second support plates (342, 344) spaced apart from each other in the second direction.

[0116] One end of the lower turn of the secondary coil (220) is disposed between the first support plate (342) and the second support plate (344), and one end of the upper turn of the secondary coil (220) is disposed between the second support plate (344) and the first part (P1) of the central portion (310). To this end, referring to FIG. 18, the first support plate (342) and the second support plate (344) form a first receiving space (SP11) in which one end of the lower turn is accommodated, and the second support plate (344) and the first part (P1) of the central portion (310) form a second receiving space (SP12) in which one end of the upper turn is accommodated.

[0117] The first anchoring support (340) includes a first support plate (342) and a second support plate (344) that are stepped in a vertical direction on an inner side opposite to the central portion (310), and the lower coil may be placed on the first support plate (342), and the upper coil may be placed on the second support plate (344).

[0118] According to an embodiment, referring to FIGS. 20 to 23, the second anchoring support member (350) may include third and fourth support plates (352, 354) spaced apart from each other in the second direction.

[0119] The other end of the lower turn of the secondary coil (220) is disposed between the third support plate (352) and the fourth support plate (354), and the other end of the upper turn of the secondary coil (220) is disposed between the fourth support plate (354) and the second part (P2) of the central portion (310). To this end, referring to FIG. 19, the third support plate (352) and the fourth support plate (354) form a third receiving space (SP21) in which one end of the lower turn is accommodated, and the fourth support plate (354) and the second part (P2) of the central portion (310) form a fourth receiving space (SP22) in which the other end of the upper turn is accommodated.

[0120] FIG. 30 shows a perspective view of the coil section (200) and the first and second fixing supports (340, 350) in the transformer shown in FIG. 1 when viewed from the side, and FIG. 31 shows a perspective view of the coil section (200) and the first and second fixing supports (340, 350) in the transformer shown in FIG. 1 when viewed from the front.

[0121] The second support plate (344) may further include a guide groove (346H). Referring to FIGS. 30 and 31, the guide groove (346H) serves to guide one end of the upper turn of the secondary coil (220) to the lower turn. Accordingly, the upper turn may be bent in the guide groove (346H) to become the lower turn.

[0122] Additionally, each of the first and second anchoring supports (340, 350) may further include a guide portion (346, 356).

[0123] Referring to Fig. 16, the guide portions (346, 356) define a space in which the primary coil (210) is placed. Accordingly, it can be seen that the outermost edge of the primary coil (210) is placed in contact with the guide portions (346, 356). In addition, the guide portion (356) of the second fixing support portion (350) defines the degree of curvature of the other end of the secondary coil (220). That is, since the other end of the secondary coil (220) turns at the guide portion (356), the degree of curvature when turning can be determined by the radius of curvature of the guide portion (356) of the second fixing support portion (358).

[0124] According to an embodiment, each of the first anchoring support (340) and the second anchoring support (350) may be coupled with the central portion (310), the first anchoring support (340) may be coupled with the first terminal portion (320), and the second anchoring support (350) may be coupled with the second terminal portion (330). Hereinafter, the coupling thereof will be described with reference to the attached drawings, but the embodiment is not limited to a specific coupling method.

[0125] Each of the first anchoring support (340) and the second anchoring support (350) and the central portion (310) can be combined as follows.

[0126] The first settling support (340) may include at least one of the first-first and first-second protrusions (PT11, PT12), and the central portion (310) may include at least one of the first-first and first-second through holes (TH11, TH12). The first-first protrusion (PT11) may be inserted into the first-first through hole (TH11), and the first-second protrusion (PT12) may be inserted into the first-second through hole (TH12), whereby the central portion (310) and the first settling support (340) may be coupled to each other.

[0127] The second settling support (350) may include at least one of the second-first and second-second protrusions (PT21, PT22), and the central portion (310) may include at least one of the second-first and second-second through holes (TH21, TH22). The second-first protrusion (PT21) may be inserted into the second-first through hole (TH21), and the second-second protrusion (PT22) may be inserted into the second-second through hole (TH22), whereby the central portion (310) and the second settling support (350) may be coupled to each other.

[0128] Referring to FIGS. 24 to 27, the first anchoring support (340) and the first terminal portion (320) can be combined as follows.

[0129] The first terminal portion (320) may further include first-fifth and first-sixth grooves (H15, H16). The first-fifth groove (H15) is located further inward of the first terminal portion (320) than the first-third groove (H13), and the first-sixth groove (H16) is located further inward of the first terminal portion (320) than the first-fourth groove (H14). At this time, the first and second wing portions (344E1, 344E2) located at the outermost portions in the second direction from the end of the second support plate (344) have a shape that can be slidably inserted into the first-fifth and first-sixth grooves (H15, H16), respectively. That is, when the first fixing support (340) is pushed toward the first terminal portion (320) in the first direction, the first wing portion (344E1) slides into the 1-5 groove (H15) and the second wing portion (344E2) slides into the 1-6 groove (H16), thereby allowing the first fixing support (340) and the first terminal portion (320) to be coupled to each other.

[0130] Referring to FIGS. 20 to 23, the second anchoring support (350) and the second terminal portion (330) can be combined as follows.

[0131] The second terminal portion (330) may include 2-5 and 2-6 grooves (H25, H26). The 2-5 groove (H25) is located further inward of the second terminal portion (330) than the 2-3 groove (H23), and the 2-6 groove (H26) is located further inward of the second terminal portion (330) than the 2-4 groove (H24). At this time, the 3rd and 4th wing portions (354E1, 354E2) located at the outermost portions in the second direction from the end of the 4th support plate (354) have a shape that can be slidably inserted into the 2-5 and 2-6 grooves (H25, H26), respectively. That is, when the second fixing support (350) is pushed toward the second terminal portion (330) in the first direction, the third wing portion (354E1) slides into the second-5 groove (H25) and the fourth wing portion (354E2) slides into the second-6 groove (H26), thereby allowing the second fixing support (350) and the second terminal portion (330) to be coupled to each other.

[0132] Hereinafter, transformers according to comparative examples and examples are described with reference to the attached drawings.

[0133] In the transformer according to the comparative example, a separate bobbin is additionally placed between the core and coil sections. In this case, the overall thickness of the transformer in the vertical direction increases due to the presence of the separate bobbin.

[0134] On the other hand, in the case of the transformer according to the embodiment, there is no separate bobbin between the core portion (100) and the coil portion (200). Therefore, the thickness of the transformer in the second direction is determined by the thickness of the core portion (100), and the thickness in the vertical direction can be thinner than that of the transformer of the comparative example. For example, referring to FIG. 28, in the second direction in which the upper core (110) and the lower core (120) face each other, the thickness (TK1) of the frame (319) defining the hollow (310H) in the central portion (310) can be less than or equal to the distance (TK2) from the upper surface (110H) of the upper core (110) to the bottom surface (120L) of the lower core (120). For example, the overall thickness (TK2) of the transformer according to the embodiment can be at most 7.2 mm.

[0135] In addition, in the embodiment, since no bobbin is placed between the coil portion (200) and the core portion (100), excellent heat dissipation characteristics are achieved. This is because the core portion (100) and the coil portion (200) are in contact with each other, so that heat generated in the coil portion (200) can be quickly discharged to the outside through the core portion (100). That is, according to the embodiment, since the core portion (100) functions as a kind of heat sink, excellent heat dissipation characteristics can be achieved.

[0136] In addition, according to the embodiment, the secondary coil (220) can maintain a double-layer structure composed of an upper turn and a lower turn thanks to the first and second support plates (342, 344) of the first anchoring support member (340), the third and fourth support plates (352, 354) of the second anchoring support member (350), and the first and second inner guide members (324, 334), thereby having even better heat generation characteristics.

[0137] Additionally, in the transformer of the comparative example, the upper core and lower core are formed as one piece, without being divided in the first direction. Typically, since the upper core and lower core are each very thin, in the comparative example, these cores can easily be broken when the mold is removed during the manufacturing process for the upper core and lower core.

[0138] On the other hand, in the case of the transformer according to the embodiment, each of the upper core (110) and the lower core (120) is divided into a plurality of pieces (for example, two pieces) in the first direction. When each of the upper core (110) and the lower core (120) is divided in this way, the problem of them being easily damaged during manufacturing can be prevented. As a result, the manufacturing yield of the core portion (100) according to the embodiment is increased.

[0139] In addition, when each of the upper core (110) and the lower core (120) is divided in the short axis direction of the bobbin (300), the length of the divided core becomes long and can be easily broken. However, in the case of the embodiment, each of the upper core (110) and the lower core (120) is divided in the long axis direction instead of the short axis direction of the bobbin (300), so that the length of each of the first and second upper cores (110) and the first and second lower cores (120) becomes short, and the problem of easy breakage can be prevented.

[0140] In addition, in the embodiment, the first side (S1) of the first upper core and the second side (S2) of the second upper core are attached to each other by a first insulating adhesive (115) having electrical insulation, and the third side (S3) of the first lower core and the fourth side (S4) of the second lower core are attached to each other by a second insulating adhesive (125) having electrical insulation. Accordingly, the electrical insulation between the winding of the coil portion (200) and the core portion (100) can be further maintained.

[0141] In addition, when soldering the first and second terminals (T1, T2), the horizontality of the mutually coupled components (310, 320, 330, 340, 350) of the bobbin (300) must be maintained. This is because the overall thickness of the transformer in the vertical direction is maintained uniformly only when the horizontality is maintained. To this end, according to the embodiment, the first terminal portion (320) and the first mounting support portion (340) are coupled to each other in a sliding manner, and the second terminal portion (330) and the second mounting support portion (350) are coupled to each other in a sliding manner, so that the horizontality of the bobbin (300) is maintained, and the overall thickness of the transformer can be uniform.

[0142] Meanwhile, since the transformer according to the aforementioned embodiment can realize a slim structure, it can be applied to a display device, such as an ultra-slim OLED TV, using a circuit board on which such a transformer is arranged. In this way, when the transformer related to the embodiment is mounted on the circuit board of a display device, it can contribute to the slimming of the display device.

[0143] In particular, since the embodiment has excellent heat generation characteristics, it can solve the heat generation problem that arises as the power consumption of the display device increases.

[0144] Although the above has been described with reference to embodiments, these are merely examples and do not limit the present invention. Those skilled in the art to which the present invention pertains will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present embodiment. For example, each component specifically shown in the embodiments can be modified and implemented. In addition, differences related to such modifications and applications should be interpreted as being included within the scope of the present invention defined in the appended claims.

[0145] The mode for carrying out the invention has been sufficiently described in the above-mentioned “Best mode for carrying out the invention.”

[0146] The transformer and the display device including the same according to the embodiment can be used in a display device such as an ultra-slim OLED TV.

Claims

1. Bobbin part having a through hole; A core portion disposed inside the through hole of the above bobbin portion and including a lower core and an upper core disposed on the lower core; A transformer including a coil section positioned between the lower core and the upper core.

2. In paragraph 1, The upper core comprises first and second upper cores divided in a horizontal direction, A transformer wherein the lower core comprises first and second lower cores divided in the horizontal direction.

3. In paragraph 2, The above horizontal directions include a first horizontal direction and a second horizontal direction which are perpendicular to each other, The upper core and lower core are each divided along the first horizontal direction, A transformer wherein the width of the second horizontal direction of the bobbin portion is greater than the width of the second horizontal direction of the core portion. The above horizontal direction is a transformer parallel to the longitudinal direction of the bobbin.

4. In paragraph 1, The above coil portion includes a primary coil and a secondary coil, The above bobbin part A transformer including a central portion having the above through hole, a plurality of fixing support portions arranged at both ends of the central portion, and a plurality of terminal portions arranged on the outer side of each of the plurality of fixing support portions.

5. In paragraph 4, The above plurality of anchoring supports include a first anchoring support that supports one end of the secondary coil and a second anchoring support that supports the other end of the secondary coil, The above secondary coil includes an upper coil and a lower coil, The above first fixing support portion includes a first support plate and a second support plate that are stepped in a vertical direction on an inner side opposite to the central portion, The above lower coil is placed on the first support plate, The upper coil is a transformer placed on the second support plate.

6. The above second support plate A transformer further comprising a guide groove for guiding one end of the upper coil of the secondary coil to the lower coil.

7. In paragraph 6, Each of the first and second anchoring supports A transformer further comprising a guide portion defining a space in which the primary coil is placed.

8. In paragraph 7, The guide part of the second fixing support part is a transformer that determines the degree of bending of the other end of the second coil.

9. In paragraph 5, The above second anchoring support Including third and fourth support plates spaced apart from each other in a second direction intersecting the first direction, The other end of the lower coil of the secondary coil is disposed between the third support plate and the fourth support plate, A transformer in which the other end of the upper coil of the secondary coil is disposed between the fourth support plate and the second part.

10. In paragraph 4, A transformer in which the thickness of the frame defining the through hole in the central portion is less than or equal to the distance from the upper surface of the upper core to the bottom surface of the lower core, in a direction in which the upper core and the lower core face each other.

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