WO2024106920A1 - Transformateur et dispositif d'affichage - Google Patents

Transformateur et dispositif d'affichage Download PDF

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Publication number
WO2024106920A1
WO2024106920A1 PCT/KR2023/018299 KR2023018299W WO2024106920A1 WO 2024106920 A1 WO2024106920 A1 WO 2024106920A1 KR 2023018299 W KR2023018299 W KR 2023018299W WO 2024106920 A1 WO2024106920 A1 WO 2024106920A1
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
plate
disposed
interval
coil
Prior art date
Application number
PCT/KR2023/018299
Other languages
English (en)
Korean (ko)
Inventor
강인석
유선영
Original Assignee
엘지이노텍(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지이노텍(주) filed Critical 엘지이노텍(주)
Publication of WO2024106920A1 publication Critical patent/WO2024106920A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins

Definitions

  • the present invention relates to transformers and display devices.
  • Transformers are used in power supplies for electronic devices, such as display devices.
  • the transformer can be miniaturized, while miniaturization of the transformer leads to a decrease in the heat dissipation area, which causes loss in the coil and core of the transformer and increases heat generation.
  • the loss of the coil and core of the transformer increases due to the skin effect and proximity effect, which increases heat generation in the coil and core.
  • a conventional transformer has a structure in which the primary coil is wound around the core so that a gap is not formed between the primary coil and the core on a plane.
  • This type of winding method for the primary coil of a conventional transformer increases heat generation by allowing heat from the primary coil to spread to the core, and makes it difficult for heat to spread in terms of heat dissipation.
  • the present invention can provide a transformer with a new structure that can be miniaturized while solving the problems of heat generation, insulation breakdown, and noise generation of the conventional transformer described above.
  • a transformer includes a core portion including two outer legs and a middle leg disposed between the two outer legs; and a primary coil unit and a secondary coil unit, wherein the primary coil unit and a portion of the secondary coil unit include a coil portion disposed within the core portion, and at least a portion of the secondary coil portion is It is disposed between the two outer feet and the primary coil portion in one direction, and the shortened portion of the primary coil portion is spaced apart from the middle leg by a predetermined first interval in a second direction intersecting the first direction.
  • the long axis portion of the primary coil portion is disposed to be spaced apart from the midfoot by a predetermined second interval in the first direction, and the first interval may be larger than the second interval.
  • the length of the long axis portion of the midfoot may be smaller than the length of the long shaft portion of the core portion, the shortened portion of the midfoot may have a first width, and the first gap may be 0.5 to 1 times the first width.
  • the second gap may be 0.45 to 0.145 times the first width.
  • the minimum distance between any one of the two outer legs and the secondary coil unit is a predetermined third interval, and the third interval may be smaller than the first interval and larger than the second interval.
  • the third spacing may be 0.145 to 0.205 times the first width.
  • the primary coil unit includes a helically wound coil
  • the secondary coil unit includes a first plate and a second plate, and the second plate intersects the first direction and the second direction. It can be placed on the first plate in three directions.
  • Each of the first plate and the second plate forms one open turn in the first direction and the second direction, and one end of each of the first plate and the second plate has a first bent portion and a first bent portion. It may include a second bent portion connected to the first bent portion, and the other end may include a third bent portion and a fourth bent portion connected to the third bent portion.
  • a terminal portion may be disposed at an end of the second bent portion of each of the first plate and the second plate, and a terminal portion may be disposed at an end of the fourth bent portion of each of the first plate and the second plate.
  • the transformer further includes a bobbin disposed within the core portion, and the bobbin may be disposed between the primary coil portion and the two outer legs.
  • a display device may include a circuit board on which the transformer is disposed.
  • the transformer according to an embodiment of the present invention can reduce heat generation problems compared to a conventional transformer, and can improve insulation and increase withstand voltage of the transformer by securing an insulation distance between the coil portion and core portion of the transformer.
  • FIG. 1 is a perspective view showing an example of the configuration of a transformer according to an embodiment.
  • Figure 3 is a perspective view showing the rear of the transformer according to the embodiment of Figure 1.
  • Figure 4 is a plan view showing the back of the transformer according to the embodiment of Figure 1.
  • FIG. 5 is a diagram showing a first side view of an example of the configuration of a transformer according to the embodiment of FIG. 1.
  • FIG. 6 is a diagram showing a second side view of an example of the configuration of a transformer according to the embodiment of FIG. 1.
  • Figure 7 is a diagram showing a transformer according to one embodiment.
  • FIG. 8 is a diagram illustrating the spacing between components of a transformer on a plane according to an embodiment.
  • FIG. 9 is a diagram illustrating the spacing between components of a transformer on a plane according to an embodiment.
  • Figure 10 is a diagram showing an example of the shape of the middle foot of the core portion according to an embodiment.
  • a and/or B includes all three cases: “A”, “B”, and “A and B”.
  • each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern.
  • the description of being formed includes all being formed directly or through another layer.
  • the criteria for “top/top” or “bottom/bottom” are, in principle, based on the appearance shown in the drawings for convenience, unless otherwise expressed in the specifications or properties of each component or each other. It is only used to indicate the relative positional relationship between elements for convenience, and should not be understood as limiting the positions of actual components.
  • “B on top” simply indicates that B is shown on top of A in the drawing, unless otherwise stated or in cases where A must be placed on top of B due to the properties of A or B. In actual products, etc., B It may be located under A, or B and A may be placed side to side.
  • 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.
  • the thickness (vertical height) of the transformer according to the present invention to contribute to slimming of the display device is 14 mm or less from the top surface of the circuit board, preferably. May be 12 mm or less, more preferably 10 mm or less.
  • FIG. 1 is a perspective view showing an example of the configuration of a transformer according to an embodiment.
  • FIG. 2 is a plan view showing an example of the configuration of a transformer according to the embodiment of FIG. 1.
  • Figure 3 is a perspective view showing the rear of the transformer according to the embodiment of Figure 1.
  • Figure 4 is a plan view showing the back of the transformer according to the embodiment of Figure 1.
  • FIG. 5 is a diagram showing a first side view (eg, a side view in the x-axis direction on the x-y axis plane) of an example of the configuration of a transformer according to the embodiment of FIG. 1.
  • Figure 6 is a diagram showing a second side view (eg, one side view in the y-axis direction on the x-y axis plane) of an example of the configuration of the transformer according to the embodiment of Figure 1.
  • the transformer 100 may include a core portion 110 and coil portions 120 and 130.
  • the core portion 110 has the properties of a magnetic circuit and can serve as a passage for magnetic flux.
  • the core portion 110 may be coupled to the lower side of the transformer 100.
  • the core portion 110 may include a flat body portion and a plurality of leg portions 111, 113, and 115 that protrude from the body portion in the thickness direction (eg, z-axis) and extend along a predetermined direction.
  • the plurality of leg portions 111, 113, and 115 extend along one axis (e.g., y-axis) direction on a plane and include two outer legs (111, 113) arranged to be spaced apart from each other along the other axis (e.g., x-axis) direction. ) and one middle leg (115) disposed between the two outer feet (111, 113).
  • the coil units 120 and 130 may include a primary coil unit 120 and a secondary coil unit 130.
  • the primary coil unit 120 may include a coil, and hereinafter, the primary coil unit 120 may be referred to as the coil 120.
  • the wire of the coil 120 may be an enamel wire (USTC wire) wrapped with fiber yarn, a LITZ wire, a triple insulated wire (TIW), or a triple insulated Litz wire. .
  • the coil 120 may be in the form of a winding wound spirally with one or more turns.
  • the coil 120 may be disposed on a portion of the upper part of the body of the core portion 110 so as to be disposed between the middle leg 115 and the secondary coil portion 130 of the core portion 110 on a plane (e.g., x-y axis plane). there is.
  • the secondary coil unit 130 may include a first plate 131 and a second plate 133 that have a flat plate shape.
  • first plate 131 and the second plate 133 may include conductive metal (eg, copper or aluminum).
  • the first plate 131 and the second plate 133 may have planar shapes that are left and right symmetrical to each other on a plane (eg, x-y axis plane).
  • the first plate 131 may form one open turn on a plane (eg, x-y axis plane).
  • One end of the first plate 131 may include a first bent portion 1311 and a second bent portion 1313, and the other end may include a third bent portion 1315 and a fourth bent portion 1317. .
  • the second bent portion 1313 and the fourth bent portion 1317 may be bent at a first angle on a plane (e.g., x-y axis plane) and extend in the direction in which the outer foot 113 is located.
  • a plane e.g., x-y axis plane
  • a terminal portion TM1 may be disposed at the end of the second bent portion 1313. Additionally, a terminal portion TM2 may be disposed at the end of the fourth bent portion 1317.
  • the second plate 133 may form one open turn on a plane (eg, x-y axis plane).
  • One end of the second plate 133 may include a first bent portion 1331 and a second bent portion 1333, and the other end may include a third bent portion 1335 and a fourth bent portion 1337. .
  • the second bent portion 1333 and the fourth bent portion 1337 may be bent at a second angle on a plane (e.g., x-y axis plane) and extend in the direction in which the outer foot 111 is located.
  • the second angle may be 180 degrees different from the first angle.
  • a terminal portion TM4 may be disposed at the end of the second bent portion 1333. Additionally, a terminal portion TM3 may be disposed at the end of the fourth bent portion 1337.
  • the secondary coil unit 130 that is, the first plate 131 and the second plate 133, are formed by forming the two outer legs 111 and 113 of the core unit 110 on a plane (e.g., x-y axis plane) and the coil ( 120) may be disposed on a portion of the upper portion of the body portion of the core portion 110.
  • a plane e.g., x-y axis plane
  • the first plate 131 and the second plate 133 may be aligned and stacked around the middle foot 115 of the core portion 110.
  • first plate 131 and the second plate 133 are positioned so that the midfoot 115 is located at the turn center of the first plate 131 and the second plate 133 on a plane (e.g., x-y axis plane). can be placed.
  • a first plate 131 may be disposed on the top of the body portion of the core portion 110, and a second plate 133 may be disposed on the top of the first plate 131.
  • the core portion 110 has a first length in one axis (e.g., y-axis) direction and the other axis (e.g., x-axis) on a plane (e.g., x-y axis plane).
  • the maximum length in one axis direction on the plane of the coil 120 is a third length that is longer than the first length
  • the maximum length in the other axis direction is a fourth length that is smaller than the second length. It can be.
  • the maximum length in one axis (e.g., y-axis) direction on the plane (e.g., x-y axis plane) of the secondary coil unit 130, that is, the first plate 131 and the second plate 133, is the third It is a fifth length that is longer than the length, and the maximum length in the direction of another axis (e.g., x-axis) may be a sixth length that is shorter than the second length and longer than the fourth length.
  • Figure 7 is a diagram showing a transformer according to one embodiment.
  • the transformer 100 may further include a bobbin 70 in addition to the embodiments of FIGS. 1 to 6 described above.
  • the bobbin 70 may be disposed between the outer legs 111 and 113 of the core portion 110 and the coil 120 on a plane (eg, x-y axis plane).
  • an insulating layer may be disposed between the first plate 131 and the second plate 133.
  • the insulating layer may include at least one of ketone, polyimide-based, PET (polyethylene terephthalate), silicone, and epoxy-based materials.
  • the transformer 100 may further include a core portion (not shown) coupled to the upper side of the transformer 100.
  • the core portion 110 coupled from the lower side and the core portion coupled from the upper side may be vertically symmetrical or asymmetrical.
  • the transformer 100 may provide a structure that minimizes the contact area between the core portion 110 and the coil portions 120 and 130.
  • the structure of the transformer 100 that minimizes the contact area between the core portion 110 and the coil portions 120 and 130 is a structure in which the conventional core portion and the coil portion overlap, so that heat generated by the coil portion is not generated by the core portion. It can be said that this is to solve the problem of transformers where heat spreads and increases.
  • the transformer 100 according to an embodiment of the present invention has a lower withstand voltage of the transformer compared to the prior art. It can be improved.
  • FIG. 8 is a diagram illustrating the spacing between components of the transformer 100 on a plane (eg, x-y axis plane) according to an embodiment.
  • FIG. 9 is a diagram illustrating the spacing between components of the transformer 100 on a plane (eg, x-y axis plane) according to an embodiment.
  • the coil 120 is formed in the form of a winding spirally wound around the middle foot 115 of the core portion 110 on a plane (e.g., x-y axis plane). ) may be arranged to be spaced apart from the middle foot 115 by a predetermined distance (71, 73).
  • a predetermined distance 71, 73
  • the inner portion of the coil 120 formed in the form of a winding and the midfoot 115 are spaced apart from each other by a predetermined distance 71, 73. It may be placed on a portion of the upper part of the body of the core portion 110.
  • the predetermined spacing 71, 73 between the coil 120 and the midfoot 115 is the first predetermined spacing between the coil 120 and the shortened portion (also called the round portion) of the midfoot 115. It may include a predetermined second gap 73 between 71 and the long axis of the coil 120 and the midfoot 115.
  • the first gap 71 may be larger than the second gap 73.
  • outer legs 111 and 113 and the secondary coil parts 131 and 133 are spaced apart from each other by a predetermined third interval 75 on a plane (e.g., x-y axis plane). ) may be placed at the top of the body portion of the core portion 110.
  • a plane e.g., x-y axis plane.
  • the outer portion of the turn of the first plate 131 and the second plate 133 in which an open turn is formed on a plane (e.g., x-y axis plane) and each outer leg 111, 113 of the core portion 110 The first plate 131 and the second plate 133 are positioned on the body of the core portion 110 so that the inner portions of each outer leg 111 and 113) are spaced apart from each other by a predetermined third interval 75. It may be placed in part of the upper part of the unit.
  • the present invention is to form a core portion (coil 120) so that the coil 120 and the shortened portion (also referred to as a round portion) of the midfoot 115 are at a predetermined first interval 71. 110) can be placed on the upper part of the body.
  • the predetermined second distance 73 is set, and the secondary coil part 130 and the outer foot 111, 113 The space between them can be set to a pre-designated second interval 73.
  • the separation distance between the midfoot 115 of the core portion 110 and the coil 120 may be specified.
  • the first predetermined gap 71 between the coil 120 and the shortened portion (also called the round portion) of the midfoot 115 of the core portion 110 is the diameter of the shortened portion of the midfoot 115 ( Alternatively, an interval of 0.5 to 1 times the width (81) may be applied.
  • the second predetermined gap 73 between the coil 120 and the long axis portion of the midfoot 115 of the core portion 110 is between 0.045 and 0.145 times the diameter 81 of the short axis of the midfoot 115. An interval of may be applied.
  • the distance between the outer portion of the turn of the first plate 131 and the second plate 133 and each of the outer feet 111 and 113 of the core portion 110, that is, the predetermined third gap 75, is the middle leg ( An interval of between 0.145 and 0.205 times the diameter 81 of the minor axis of 115) may be applied.
  • the pre-specified first gap 71 is any one of 5.5 mm to 11 mm, and the pre-specified first interval 71 is 11 mm.
  • Spacing 71 may be any value between 0.5 mm and 1.6 mm.
  • Table 1 shows the transformer manufactured without a separation gap between the middle leg 115 of the conventional core part 110 and the primary coil part 120, and the transformer 100 manufactured according to the embodiments of the present invention described above. This shows the liver withstand voltage measurement data.
  • the transformer 100 according to the above-described embodiments may have a relative noise reduction effect due to vibration compared to the prior art.
  • the coil 120 and the core portion 110 vibrate and generate noise, and the contact area between the coil 120 and the core portion 110 is larger than that of a conventional transformer. Therefore, the transformer 100 according to the above-described embodiments can have the effect of reducing noise due to vibration.
  • the coil 120 and the midfoot 115 of the core portion 110 are spaced apart from each other, the degree of freedom in the shape of the midfoot of the core portion 110 can be secured.
  • midfoot of various shapes can be implemented as shown in Figure 10.
  • Figure 10 is a diagram showing an example of the shape of the middle foot of the core portion according to an embodiment.
  • the shape of the middle leg 115 of the core portion 110 may be implemented in an octagonal shape as shown in (a) of FIG. 10. Additionally, the shape of the middle leg 115 of the core portion 110 may be circular 115 as shown in (b) of FIG. 10 .
  • the transformer and display device according to the embodiment may be used in an electronic device, for example, a power supply device for a display device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention concerne, selon un mode de réalisation, un transformateur qui peut comprendre : une partie noyau qui comprend deux branches externes et une branche médiane disposée entre les deux branches externes ; et une partie bobine qui comprend une partie de bobine primaire et une partie de bobine secondaire, une section de la partie de bobine primaire et de la partie de bobine secondaire étant disposée dans la partie noyau : au moins une section de la partie de bobine secondaire étant disposée entre les deux branches externes et la partie de bobine primaire dans une première direction ; une section à axe court de la partie de bobine primaire étant disposée de manière à être espacée d'une première distance prédéterminée par rapport à la branche médiane dans une seconde direction croisant la première direction ; une section à axe long de la partie de bobine primaire étant disposée de manière à être espacée d'une seconde distance prédéterminée par rapport à la branche médiane dans la première direction ; et la première distance étant supérieure à la seconde distance.
PCT/KR2023/018299 2022-11-18 2023-11-14 Transformateur et dispositif d'affichage WO2024106920A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0155253 2022-11-18
KR1020220155253A KR20240073432A (ko) 2022-11-18 2022-11-18 트랜스포머 및 디스플레이 장치

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WO2024106920A1 true WO2024106920A1 (fr) 2024-05-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8665051B2 (en) * 2011-10-12 2014-03-04 Tdk Corporation Vertical transformer
KR102110344B1 (ko) * 2018-12-28 2020-05-14 주식회사 엠에스티테크 트랜스포머 및 그 제조방법
CN112185655A (zh) * 2020-09-30 2021-01-05 昱京科技股份有限公司 薄型谐振变压器漏感调整结构
KR102394405B1 (ko) * 2020-07-17 2022-05-06 엘지이노텍 주식회사 트랜스포머 및 이를 포함하는 평판 디스플레이 장치
KR20220131196A (ko) * 2021-03-19 2022-09-27 엘지이노텍 주식회사 트랜스포머 및 이를 포함하는 회로기판

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8665051B2 (en) * 2011-10-12 2014-03-04 Tdk Corporation Vertical transformer
KR102110344B1 (ko) * 2018-12-28 2020-05-14 주식회사 엠에스티테크 트랜스포머 및 그 제조방법
KR102394405B1 (ko) * 2020-07-17 2022-05-06 엘지이노텍 주식회사 트랜스포머 및 이를 포함하는 평판 디스플레이 장치
CN112185655A (zh) * 2020-09-30 2021-01-05 昱京科技股份有限公司 薄型谐振变压器漏感调整结构
KR20220131196A (ko) * 2021-03-19 2022-09-27 엘지이노텍 주식회사 트랜스포머 및 이를 포함하는 회로기판

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