Search

EP-4521723-B1 - PRINTED CIRCUIT BOARD AND ELECTRONIC DEVICE COMPRISING SAME

EP4521723B1EP 4521723 B1EP4521723 B1EP 4521723B1EP-4521723-B1

Inventors

  • CHOI, Taihwan
  • LIM, GUN
  • KIM, JONGDOO
  • KIM, JONGMIN
  • MIN, Ungki
  • PARK, Gunhee
  • PARK, Daeseung
  • YU, GARAM
  • LEE, Bongyeol
  • Lee, Hanyeop

Dates

Publication Date
20260506
Application Date
20230714

Claims (15)

  1. An electronic device (101, 200) comprising: an electronic component (230) including a coil therein; and a printed circuit board (240) that is disposed to surround at least a part of the electronic component (230), characterized in that the printed circuit board (240) includes plural slits disposed at preset intervals in at least one of regions facing the electronic component (230), wherein each of the plural slits includes a central slit portion (2421) extended along a center of the slit, and a symmetric slit portion (2422) extended to be symmetric with respect to the central slit portion (2421).
  2. The electronic device (101, 200) of claim 1, wherein: the printed circuit board (240) includes a first region (241a) positioned to be spaced apart in a first direction of the electronic component (230) and facing the electronic component (230), a second region (241b) positioned to be spaced apart from the electronic component (230) in a second direction opposite to the first direction and facing the electronic component (230), and a third region (241c) positioned to be spaced apart from the electronic component (230) in a third direction perpendicular to the first and second directions and facing the electronic component (230); and the plural slits are disposed at intervals in at least one region among the first region (241a), the second region (241b), and the third region (241c).
  3. The electronic device (101, 200) of claim 2, wherein the plural slits are disposed at intervals in each of the first region (241a), the second region (241b), and the third region (241c).
  4. The electronic device (101, 200) of claim 1, wherein the printed circuit board (240) includes a cut region (241) formed by cutting off a portion of the printed circuit board (240) and where the electronic component (230) is disposed.
  5. The electronic device (101, 200) of claim 1, wherein a portion of the printed circuit board (240) includes a protrusion (243, 245, 247) that is formed between plural slits and to protrude and extend in a direction toward the electronic component (230).
  6. The electronic device (101, 200) of claim 1, wherein: the central slit portion (2421) is formed to extend in a direction away from the electronic component (230); and the symmetric slit portion (2422) is extended from one end of the central slit portion (2421) in a direction perpendicular to a direction where the central slit portion (2421) is extended so as to be symmetric with respect to the central slit portion (2421).
  7. The electronic device (101, 200) of claim 6, wherein: a portion of the printed circuit board (240) includes a protrusion (243, 245, 247) that is formed between plural slits and to protrude and extend in a direction toward the electronic component (230); and the protrusion (243, 245, 247) includes a central protrusion portion (2431, 2471) in which a portion of the printed circuit board (240) protrudes and extends in a direction perpendicular to a direction where the printed circuit board (240) is extended, and a symmetric protrusion portion (2432) formed to extend from one end of the central protrusion portion (2431, 2471) in a direction perpendicular to a direction where the central protrusion portion (2431, 2471) is extended in a form symmetric with respect to the central protrusion portion (2431, 2471).
  8. The electronic device (101, 200) of claim 1, wherein the slit includes a concave portion (2423) formed in a shape in which one side and the other side are concave toward a direction perpendicular to a direction where the slit is extended, and a concave extension portion (2424) connected to the concave portion (2423) and extended from one end of the concave portion (2423) toward the printed circuit board (240) in a direction away from the electronic component (230).
  9. The electronic device (101, 200) of claim 8, wherein: a portion of the printed circuit board (240) includes a protrusion (243, 245, 247) that is formed between plural slits and to protrude and extend in a direction toward the electronic component (230); and the protrusion (243, 245, 247) includes a central protrusion portion (2431, 2471) in which a portion of the printed circuit board (240) protrudes and extends in a direction perpendicular to a direction where the printed circuit board (240) is extended, and a circular protrusion portion (2472) formed in a circular shape at one end of the central protrusion portion (2431, 2471).
  10. The electronic device (101, 200) of claim 1, wherein: the slits include a first slit (242) including a central slit portion (2421) and a symmetric slit portion (2422), and a second slit (244) formed to extend in a direction away from the electronic component (230); and the first slit (242) and the second slit (244) are alternately disposed at intervals in at least a region of the printed circuit board (240).
  11. The electronic device (101, 200) of claim 10, wherein: a portion of the printed circuit board (240) includes at least two protrusions (243, 245, 247) that are formed between plural slits to protrude and extend in a direction toward the electronic component (230); the protrusion (243, 245, 247) includes an extension portion (2451) in which a portion of the printed circuit board (240) protrudes and extends in a direction toward the electronic component (230), and a symmetric portion (2452) extended from one end of the extension portion (2451) in a direction perpendicular to a direction where the extension portion (2451) is extended; the at least two protrusions (243, 245, 247) are disposed with a second slit (244) interposed therebetween; and the at least two protrusions (243, 245, 247) disposed with a second slit (244) interposed therebetween are formed to be symmetrical to each other with respect to the second slit (244).
  12. The electronic device (101, 200) of claim 1, wherein the electronic component (230) is a speaker or a receiver.
  13. The electronic device (101, 200) of claim 2, further comprising: a battery (189, 210) disposed to be spaced apart from the printed circuit board (240) in a length direction of the electronic device (101, 200); a battery connector (270) disposed on the printed circuit board (240) and electrically connecting the printed circuit board (240) and the battery (189, 210); and a power consuming component disposed on the printed circuit board (240) and receiving power from the battery (189, 210), wherein the plural slits are formed in a region positioned relatively close to the power consuming component compared to other regions among the first region (241a), the second region (241b), and the third region (241c).
  14. A printed circuit board (240) comprising: a cut region (241) formed by cutting off a portion of the printed circuit board (240); and characterized in a plurality of slits formed around the cut region (241), wherein each of the plural slits includes a central slit portion (2421) extended along a center of the slit and a symmetric slit portion (2422) extended to be symmetric with respect to the central slit portion (2421).
  15. The printed circuit board (240) of claim 14, comprising: a first region (241a) positioned in a first direction with respect to the cut region (241); a second region (241b) positioned in a second direction opposite to the first direction with respect to the cut region (241); and a third region (241c) positioned in a third direction perpendicular to the first and second directions with respect to the cut region (241), wherein the plural slits are disposed at intervals in at least one region among the first region (241a), the second region (241b), and the third region (241c).

Description

[Technical Field] Embodiments of the disclosure relate to a printed circuit board and an electronic device including the same. [Background Art] A portable electronic device including a speaker (e.g., smartphone) may be designed in a structure where a portion of a printed circuit board included in the portable electronic device is cut off and a speaker is placed thereat in order to make the thickness thin. For example, the cut portion of the printed circuit board may be disposed to surround at least a portion of the circumference of the speaker. The portable electronic device may include a battery for supplying power to a power consuming component (e.g., power amplifier) disposed on the printed circuit board. As power is supplied from the battery to the power consuming component, a current path from the battery to the power consuming component and a return current path from the power consuming component to the ground portion of the printed circuit board may be formed. Background art on substrate openings relating to the functionality of electronic devices may be found in KR20210001813A, US2021203189A1 and US2013307746A1. [Disclosure of Invention] [Technical Problem] A part of the return current path spreading to the ground portion of the printed circuit board may be formed at the cut portion of the printed circuit board for arranging the speaker. A return current may flow through the portion of the printed circuit board being cut off (e.g., a portion of the printed circuit board surrounding the speaker), and thus an H-field may be formed due to the return current. The H-field passes through a coil inside the speaker and generates a current in the coil, which may cause unintended speaker operation. The H-field applied to the speaker may be proportional to the intensity of current and inversely proportional to the square of the distance (e.g., distance between the speaker and the return current path). Since the gap between the printed circuit board and the speaker is minimized by design so as to make the portable electronic device thin and light, it may be difficult to use a method of increasing the distance between the speaker and the return current path to attenuate the H-field. Therefore, there is a need for a structure capable of reducing the intensity of a return current generated on the printed circuit board in order to attenuate the H-field. An electronic device according to an embodiment of the disclosure may provide a structure capable of attenuating an H-field caused by a return current by blocking current flows around the speaker. [Solution to Problem] The invention is set out in the appended set of claims. [Advantageous Effects of Invention] An electronic device according to an embodiment of the disclosure may include a printed circuit board having slits formed thereon to thereby attenuate H-fields formed in electronic components (e.g., speaker, receiver). [Brief Description of Drawings] FIG. 1 is a block diagram of an electronic device in a network environment according to embodiments.FIG. 2 is a view illustrating an electronic device according to an embodiment of the disclosure.FIGS. 3A, 3B, 3C and 3D are views illustrating an electronic component and a printed circuit board according to an embodiment of the disclosure.FIG. 4 is a view showing slits and protrusions according to an embodiment of the present disclosure.FIG. 5 is a view illustrating a printed circuit board including slits according to an embodiment of the disclosure.FIG. 6 is a view illustrating a printed circuit board including a first slit and a second slit according to an embodiment of the disclosure.FIG. 7 is a view illustrating a protrusion including a circular protrusion portion according to an embodiment of the disclosure.FIGS. 8A, 8B, 8C and 8D are diagrams illustrating a return current generated on a printed circuit board and an equivalent circuit.FIGS. 9A and 9B are diagrams illustrating the intensity of the H-field generated on a printed circuit board. [Mode for the Invention] FIG. 1 is a block diagram illustrating an electronic device in a network environment according to an embodiment. Referring to FIG. 1, an electronic device 101 in a network environment 100 may communicate with an external electronic device 102 via a first network 198 (e.g., a short-range wireless communication network), or at least one of an external electronic device 104 or a server 108 via a second network 199 (e.g., a long-range wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 via the server 108. According to an embodiment, the electronic device 101 may include a processor 120, memory 130, an input module 150, a sound output module 155, a display module 160, an audio module 170, a sensor module 176, an interface 177, a connecting terminal 178, a haptic module 179, a camera module 180, a power management module 188, a battery 189, a communication module 190, a subs