# US 12,763,248 B2 · Magnetic element and image output device comprising same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,248 B2 - Document ID: US12763248B2 - Status: Granted - Kind: B2 - Application number: 18/033,014 - Filed: 2021-10-21 - Published: 2023-12-07 - Granted: 2026-10-13 - Earliest claimed: 2020-10-21 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Seok Bae; Sun Young Yu; Jung Eun Lee; In Seong Sohn - Web page: https://patentgrep.com/patent/US12763248B2 ## CPC - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H01F 27/26: Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) - H01F 27/29: Terminals; Tapping arrangements {for signal inductances} - H01F 27/325: {Coil bobbins (formers for coils in general H01F5/02)} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A magnetic element according to an embodiment of the present invention a first core, a second core, a bobbin including a through-hole, the bobbin being at least partially disposed between the first core and the second core, a first coil unit and a second coil unit at least partially disposed on the bobbin, wherein at least one of the first coil unit or the second coil unit includes a plurality of conductive wires disposed around the through-hole, wherein the bobbin includes a first portion formed to allow the first end portion and the second end portion of each of the plurality of conductive wires to be disposed thereon and a second portion formed opposite the first portion in a horizontal direction, with the through-hole interposed therebetween, and wherein portions of the plurality of conductive wires overlap each other vertically on the second portion. ## Claims ### Claim 1 A magnetic element, comprising: a first core; a second core disposed on the first core; a bobbin comprising a through-hole formed in a center portion thereof, the bobbin being at least partially disposed between the first core and the second core; and a first coil unit and a second coil unit at least partially disposed on the bobbin, wherein at least one of the first coil unit or the second coil unit comprises a plurality of conductive wires disposed around the through-hole, each of the plurality of conductive wires comprising a first end portion and a second end portion, wherein the bobbin comprises: a first portion formed to allow the first end portion and the second end portion of each of the plurality of conductive wires to be disposed thereon; and a second portion formed opposite the first portion in a horizontal direction, with the through-hole interposed therebetween, wherein portions of the plurality of conductive wires overlap each other vertically on the second portion, wherein the first portion of the bobbin is disposed on one side thereof in a first direction, which is one among the horizontal direction on a basis of the through-hole, wherein the second portion of the bobbin is disposed on another side thereof, the another side being opposite the first portion on the basis of the through-hole, wherein the plurality of conductive wires includes a first conductive wire and a second conductive wire, at least a portion of the first conductive wire and at least a portion of the second conductive wire overlap each other on the second portion, and wherein the bobbin has an opening formed in the second portion to expose at least a part of a portion in which the plurality of conductive wires overlaps. ### Claim 2 (depends on 1) The magnetic element according to claim 1, wherein the first coil unit and the second coil unit overlap each other in one direction. ### Claim 3 (depends on 1) The magnetic element according to claim 1, wherein the bobbin comprises: a top plate; a bottom plate; and a side wall disposed between the top plate and the bottom plate, and wherein the opening is formed in at least one of the top plate or the bottom plate. ### Claim 4 (depends on 3) The magnetic element according to claim 3, wherein the opening has any one planar shape from among a semicircular shape, a circular shape, a track-like shape, and a polygonal shape. ### Claim 5 (depends on 1) The magnetic element according to claim 1, wherein an overlapping portion, in which the plurality of conductive wires overlaps each other, comprises a plurality of regions respectively corresponding to overlapping pairs of the plurality of conductive wires, and wherein the opening exposes at least some of the plurality of regions. ### Claim 6 (depends on 1) The magnetic element according to claim 1, wherein the bobbin comprises: a plurality of terminal pins disposed on the first portion to allow two different first and second end portions of each of the plurality of conductive wires to be connected thereto; and a plurality of short-circuiting portions configured to short-circuit at least one pair of the plurality of terminal pins with each other, and wherein one of the plurality of short-circuiting portions short-circuits at least two pairs of terminal pins with each other. ### Claim 7 (depends on 1) The magnetic element according to claim 1, wherein the plurality of conductive wires of the first coil unit includes the first conductive wire and the second conductive wire, and wherein the second coil unit includes a metal plate. ### Claim 8 (depends on 1) The magnetic element according to claim 1, wherein the plurality of conductive wires further includes a third conductive wire, and a fourth conductive wire disposed around the through-hole, each of the first to fourth conductive wires including the first end portion and the second end portion. ### Claim 9 (depends on 8) The magnetic element according to claim 8, wherein a portion of the third conductive wire overlaps a portion of the fourth conductive wire vertically. ### Claim 10 (depends on 8) The magnetic element according to claim 8, wherein the first conductive wire includes another portion overlapping another portion of the fourth conductive wire vertically, and wherein a portion of the first conductive wire and the another portion of the first conductive wire are disposed at different positions from each other. ### Claim 11 (depends on 9) The magnetic element according to claim 9, wherein the second conductive wire includes another portion overlapping another portion of the third conductive wire vertically, and wherein a portion of the second conductive wire and another portion of the second conductive wire are disposed at different positions from each other. ### Claim 12 A magnetic element comprising: a first core; a second core disposed on the first core; a bobbin comprising a through-hole formed in a center portion thereof, the bobbin being at least partially disposed between the first core and the second core; and a first coil unit and a second coil unit at least partially disposed on the bobbin, wherein at least one of the first coil unit or the second coil unit comprises a plurality of conductive wires disposed around the through-hole, each of the plurality of conductive wires comprising a first end portion and a second end portion, wherein the bobbin comprises: a first portion formed to allow the first end portion and the second end portion of each of the plurality of conductive wires to be disposed thereon; and a second portion formed opposite the first portion in a horizontal direction, with the through-hole interposed therebetween, wherein portions of the plurality of conductive wires overlap each other vertically on the second portion, wherein the plurality of conductive wires includes a first conductive wire, a second conductive wire, a third conductive wire, and a fourth conductive wire disposed around the through-hole, each of the first to fourth conductive wires including the first end portion and the second end portion, and wherein the first end portion of the third conductive wire, the first end portion of the first conductive wire, the first end portion of the fourth conductive wire, the first end portion of the second conductive wire, the second end portion of the first conductive wire, the second end portion of the third conductive wire, the second end portion of the second conductive wire, and the second end portion of the fourth conductive wire are disposed parallel to each other on the first portion. ### Claim 13 (depends on 12) The magnetic element according to claim 12, wherein the first end portion of the fourth conductive wire, the first end portion of the second conductive wire, the second end portion of the first conductive wire, and the second end portion of the third conductive wire are electrically short-circuited with each other to configure a first terminal portion. ### Claim 14 (depends on 13) The magnetic element according to claim 13, wherein the first end portion of the third conductive wire and the first end portion of the first conductive wire are electrically short-circuited with each other to configure a second terminal portion, and wherein the second end portion of the second conductive wire and the second end portion of the fourth conductive wire are electrically short-circuited with each other to configure a third terminal portion. ### Claim 15 (depends on 14) The magnetic element according to claim 14, wherein the first terminal portion is grounded, and wherein the second terminal portion and the third terminal portion are connected to electrically different polarities. ### Claim 16 (depends on 6) The magnetic element according to claim 6, wherein each of the plurality of short-circuiting portions corresponds to any one of an in, an out, and a ground, and wherein a number of end portions connected to terminal pins corresponding to the ground, among the different first and the second end portions of each of the plurality of conductive wires is at least twice a number of end portions connected to the in or the out. ### Claim 17 (depends on 5) The magnetic element according to claim 5, wherein a planar area of the opening is 50% to 90% of a sum of planar areas of the plurality of regions. ### Claim 18 (depends on 1) The magnetic element according to claim 1, wherein the first conductive wire and the second conductive wire do not overlap each other on the center portion. ### Claim 19 (depends on 1) An image output device, comprising the magnetic element of claim 1.