US-12620517-B2 - Line filter and display device comprising same

US12620517B2US 12620517 B2US12620517 B2US 12620517B2US-12620517-B2

Abstract

A display device including a display panel which comprises: a power supply board comprising a line filter. The line filter, to remove noise, comprising: a case connectable to a printed circuit board to thereby electrically connect the line filter to the printed circuit board; a magnetic core to be accommodated in the case; a core cover coupleable to the case to cover the magnetic core; a coil wound around an outside of the case and the core cover; and a separator coupleable to the case and the core cover. The separator comprises: a base; an isolating portion protruding from the base to be insertable into the case and the core cover so as to isolate a region in which the coil is wound; and a stepped portion protruding from the base and in contact with one surface of the case to separate the base from the printed circuit board.

Inventors

Wonmyung WOO
Jeongil KANG
Sungyong Joo

Assignees

SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230420
Priority Date: 20201130

Claims (10)

1 . A display device including a display panel, the display device comprising: a power supply board, configured to supply power to the display device, and including a line filter, wherein the line filter is configured to remove noise and the line filter includes: a case, connectable to a printed circuit board to thereby allow the line filter to be electrically connected to the printed circuit board; a magnetic core to be accommodated in the case while the case is connected to the printed circuit board; a core cover coupleable to the case to cover the magnetic core while the magnetic core is accommodated in the case; a coil wound around an outside of the case and the core cover; and a separator coupleable to the case and the core cover, wherein the separator includes: a base; an isolating portion protruding from the base to be insertable into the case and the core cover to thereby allow the separator to be coupled to the case and the core cover so as to isolate a region in which the coil is wound; and a stepped portion protruding from the base and in contact with one surface of the case to separate the base from the printed circuit board, wherein at least a portion of the case is disposed on one side of the printed circuit board, and wherein the base is disposed spaced apart from the printed circuit board on another side opposite to the one side of the printed circuit board.
2 . The display device of claim 1 , wherein the case and the core cover have an annular shape, the case includes: a first guide rib protruding toward a hollow portion of the case to allow the separator to be inserted into the hollow portion of the case; and the core cover includes: a second guide rib protruding toward a hollow portion of the core cover to allow the separator to be inserted into the hollow portion of the core cover, wherein the stepped portion is in contact with the first guide rib.
3 . The display device of claim 2 , wherein the printed circuit board includes a hole into which at least a portion of the line filter is insertable, wherein the base of the separator of the line filter is configured to cover the hole.
4 . The display device of claim 3 , wherein alternate current (AC) power is applied to the power supply board through a live line and a neutral line, wherein the region is a first region, in which the coil is wound, on a first side of the case and the core cover along a first direction, the first region being where a coil connected to the live line is wound, and the isolating portion isolates a second region on a second side of the case and the core cover along the first direction, the second region being where a coil connected to the neutral line is wound, wherein the isolating portion is configured to pass through the hollow portion of the case and the hollow portion of the core cover to isolate the first region and the second region from each other.
5 . The display device of claim 4 , wherein the coil includes a first coil wound around the first region and a second coil wound around the second region, wherein the second guide rib further protrudes in a second direction to prevent the first coil and the second coil from coming into contact with each other.
6 . The display device of claim 1 , wherein the core cover includes a coupling protrusion protruding downward from an outer circumferential surface of the core cover to be coupled to an upper side of the case, wherein the case includes a coupling groove positioned to correspond to the coupling protrusion.
7 . The display device of claim 1 , wherein the printed circuit board includes a hole into which at least a portion of the line filter is insertable, wherein the case includes a fixing guide protruding downward to be in contact with at least a portion of a surface of the printed circuit board where the hole of the printed circuit board is formed, so as to guide a fixation of the line filter based on the line filter being connected to the printed circuit board.
8 . The display device of claim 7 , wherein the case includes: a receiving portion having an annular shape to accommodate the magnetic core; a connector formed on an outer circumferential surface of the receiving portion, the connector including a connection pin through which the line filter is electrically connected to the printed circuit board; and a contact portion protruding downward from the connector to be in contact with the printed circuit board.
9 . The display device of claim 8 , wherein the case includes an indicator protrusion protruding downward from the connector to guide a direction of the line filter along which the line filter is electrically connected to the printed circuit board.
10 . The display device of claim 1 , wherein the case and the core cover are formed of different materials, wherein the case includes a phenol-based resin to allow the case to have a heat resistance higher than a heat resistance of the core cover.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation application, under 35 U.S.C. § 111(a), of international application No. PCT/KR2021/014064, filed on Oct. 13, 2021, which claims priority under 35 U. S. C. § 119 to Korean Patent Application No. 10-2020-0163929, filed Nov. 30, 2020, the disclosures of which are incorporated herein by reference in their entirety. BACKGROUND Field The present disclosure relates to a line filter including an improved structure, and a display device including the same. Discussion of Related Art Electronic devices generate electromagnetic waves, and electromagnetic waves are radiated to other nearby devices, which may act as noise affecting the operation of nearby devices. That is, electromagnetic waves may cause Electro Magnetic Interference (EMI). In addition, because electromagnetic waves may also affect the human body, there are international regulations to prevent the negative influence of the electromagnetic waves. Therefore, a noise filter may be provided in the electronic device to transmit a current required for operation and to remove noise. This may be equally provided in the display device. A line filter may generally be installed on a power supply board that supplies power to a display device, and there is a demand for producing the line filter that is simply installed without a separate structure. SUMMARY One aspect of the present disclosure provides a display device including a display panel, the display device including a power supply board, configured to supply power to the display device, and including a line filter. The line filter is configured to remove noise and the line filter includes a case connectable to a printed circuit board to thereby allow the line filter to be electrically connected to the printed circuit board, a magnetic core to be accommodated in the case while the case is connected to the printed circuit board, a core cover coupleable to the case to cover the magnetic core while the magnetic core is accommodated in the case, a coil wound around an outside of the case and the core cover, and a separator coupleable to the case and the core cover. The separator includes a base, an isolating portion protruding from the base to be insertable into the case and the core cover to thereby allow the separator to be coupled to the case and the core cover so as to isolate a region in which the coil is wound, and a stepped portion protruding from the base and in contact with one surface of the case to separate the base from the printed circuit board. The case and the core cover may have an annular shape. The case may include a first guide rib protruding toward a hollow portion of the case to allow the separator to be inserted into the hollow portion of the case, and the core cover may include a second guide rib protruding toward a hollow portion of the core cover to allow the separator to be inserted into the hollow portion of the core cover. The stepped portion may be in contact with the first guide rib. The printed circuit board may include a hole into which at least a portion of the line filter is inserted. The base of the separator of the line filter may be configured to cover the hole. Alternate current (AC) power may be applied to the power supply board through a live line and a neutral line. The region, in which the coil is wound, may include a first region on a first side of the case and the core cover along a first direction, the first region being where a coil connected to the live line is wound, and a second region on a second side of the case and the core cover along the first direction, the second region being where a coil connected to the neutral line is wound. The isolating portion may be configured to pass through the hollow portion of the case and the hollow portion of the core cover to isolate the first region and the second region from each other. The coil may include a first coil wound around the first region and a second coil wound around the second region. The second guide rib may further protrude in a second direction to prevent the first coil and the second coil from coming into contact with each other. The core cover may include a coupling protrusion protruding downward from an outer circumferential surface of the core cover to be coupled to an upper side of the case. The case may include a coupling groove positioned to correspond to the coupling protrusion. The printed circuit board may include a hole into which at least a portion of the line filter is insertable. The case may include a fixing guide protruding downward to be in contact with at least a portion of a surface of the printed circuit board where the hole of the printed circuit board is formed, so as to guide a fixation of the line filter based on the line filter being connected to the printed circuit board. The case may include a receiving portion having an annular shape to accommodate the magnetic core, a connector formed on an outer circumferenti