WO2022019519A1 - Transducteur ultra-mince - Google Patents

Transducteur ultra-mince Download PDF

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Publication number
WO2022019519A1
WO2022019519A1 PCT/KR2021/008397 KR2021008397W WO2022019519A1 WO 2022019519 A1 WO2022019519 A1 WO 2022019519A1 KR 2021008397 W KR2021008397 W KR 2021008397W WO 2022019519 A1 WO2022019519 A1 WO 2022019519A1
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WO
WIPO (PCT)
Prior art keywords
magnet
transducer
plate
slim
ultra
Prior art date
Application number
PCT/KR2021/008397
Other languages
English (en)
Inventor
Allan Devantier
Original Assignee
Samsung Electronics Co., Ltd.
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
Priority claimed from US16/936,875 external-priority patent/US11503411B2/en
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2022019519A1 publication Critical patent/WO2022019519A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • One or more embodiments relate generally to transducers, and in particular, to a slim acoustic transducer with side-mounted voice-coils that are perpendicular to a diaphragm.
  • slot loading the transducer include preventing it from being touched and also minimizing interference with industrial design. Slot loading a shallow transducer, however, also makes it more prone to rocking because the acoustic load on the diaphragm becomes asymmetric.
  • One embodiment provides a slim sound transducer having a diaphragm centered on a vertical axis and a speaker including the same.
  • an acoustic transducer comprises a diaphragm substantially centered on a vertical axis; an upper plate substantially perpendicular to the vertical axis, the upper plate configured to house an upper magnet; a lower plate substantially perpendicular to the vertical axis, the lower plate configured to house a lower magnet; and a voice coil having a height parallel to the vertical axis, wherein the voice coil is at least partially disposed within the upper plate and at least partially disposed within the lower plate.
  • the upper magnet may nclude a first upper magnet and a second upper magnet each having a ring shape
  • the lower magnet may include a first lower magnet and a second lower magnet each having a ring shape.
  • the voice coil may move between a gap between the first upper magnet and the second upper magnet and a gap between the first lower magnet and the second lower magnet.
  • the upper magnet may include a first upper magnet having a disk shape and a second upper magnet having a ring shape
  • the lower magnet may include a first lower magnet having a disk shape and a second lower magnet having a ring shape.
  • the voice coil may move between a gap between the first upper magnet and the second upper magnet and a gap between the first lower magnet and the second lower magnet.
  • the acoustic transducer may further comprise an upper metallic structure housed in the upper plate and a lower metallic structure housed in the lower plate.
  • Each of the upper magnet, the lower magnet, the upper metallic structure, and the lower metallic structure may have a ring shape.
  • the voice coil may move between a gap between the upper magnet and the upper metallic structure and a gap between the lower magnet and the lower metallic structure.
  • Each of the upper magnet and the lower magnet may have a disk shape, and each of the upper metallic structure and the lower metal structure may have a ring shape.
  • the voice coil may move between a gap between the upper magnet and the upper metallic structure and a gap between the lower magnet and the lower metallic structure.
  • Each of the upper metallic structure and the lower metallic structure may include low carbon steel or soft magnetic steel.
  • the acoustic transducer may further comprise a structure coupled to the upper plate and the lower plate, wherein the structure may be configured as one of a direct radiating structure and a slot firing structure.
  • a distance along the vertical axis between the upper magnet and the lower magnet may be less than a distance along the vertical axis between the upper plate and the lower plate.
  • a speaker having a transducer according to one or more embodiments may have a slim structure.
  • FIG. 1 illustrates a cross-sectional view of a conventional planar-magnetic micro-speaker
  • FIG. 2 illustrates a cross-sectional view of an example conventional micro-speaker
  • FIG. 3 illustrates a cross-sectional view of an ultra-slim transducer, according to some embodiments
  • FIG. 4 illustrates a cross-sectional view of a direct radiating ultra-slim transducer with two magnet pairs, according to some embodiments
  • FIG. 5 illustrates a cross-sectional view of a slot firing ultra-slim transducer with two magnet pairs, according to some embodiments
  • FIG. 6 illustrates a cross-sectional view of a slot firing ultra-slim transducer with two magnet pairs, according to some embodiments
  • FIG. 7 illustrates an image of magnetic flux for the ultra-slim transducer of FIG. 6, according to some embodiments
  • FIG. 8A illustrates a graph of flux through a magnetic coil and speaker structure for the ultra-slim transducer of FIG. 6, according to some embodiments
  • FIG. 8B illustrates a graph of flux through a speaker structure middle radially for the ultra-slim transducer of FIG. 6, according to some embodiments
  • FIG. 9 illustrates a cross-sectional view of a direct radiating ultra-slim transducer with one magnet pair, according to some embodiments.
  • FIG. 10 illustrates a cross-sectional view of a slot firing ultra-slim transducer with one magnet pair, according to some embodiments
  • FIG. 11 illustrates a cross-sectional view of a slot firing ultra-slim transducer with one disc magnet pair, according to some embodiments
  • FIG. 12 illustrates an image of magnetic flux for the ultra-slim transducer of FIG. 11, according to some embodiments
  • FIG. 13A illustrates a graph of flux through a magnetic coil and speaker structure for the ultra-slim transducer of FIG. 11, according to some embodiments
  • FIG. 13B illustrates a graph of flux through a speaker structure middle radially for the ultra-slim transducer of FIG. 11, according to some embodiments;
  • FIG. 14 illustrates a cross-sectional view of another direct radiating ultra-slim transducer, according to some embodiments.
  • FIG. 15 illustrates a cross-sectional view of another slot firing ultra-slim transducer, according to some embodiments.
  • FIG. 16 illustrates a cross-sectional view of yet another slot firing ultra-slim transducer, according to some embodiments.
  • FIG. 17 illustrates an image of magnetic flux for the ultra-slim transducer of FIG. 16, according to some embodiments
  • FIG. 18A illustrates a graph of flux through a magnetic coil and speaker structure for the ultra-slim transducer of FIG. 16, according to some embodiments
  • FIG. 18B illustrates a graph of flux through a speaker structure middle radially for the ultra-slim transducer of FIG. 16, according to some embodiments.
  • FIG. 19 illustrates a process for designing a slim acoustic transducer, according to some embodiments.
  • One or more embodiments relate generally to transducers, and in particular, to a slim acoustic transducer with side-mounted voice-coils that are perpendicular to a diaphragm.
  • One embodiment provides a slim acoustic transducer with a diaphragm that is substantially centered on a vertical axis.
  • a first top plate is substantially perpendicular to the vertical axis.
  • the first top plate houses a first upper magnet.
  • a first bottom plate is substantially perpendicular to the vertical axis.
  • the first bottom plate houses a first lower magnet.
  • a voice coil has a height parallel to the vertical axis. The voice coil is at least partially disposed within the first top plate and at least partially disposed within the first bottom plate.
  • the terms “loudspeaker,” “loudspeaker device,” and “loudspeaker system” may be used interchangeably in this specification.
  • a diaphragm is a membrane attached to a voice coil, which moves in a magnetic gap, vibrating the diaphragm, and producing sound.
  • FIG. 1 illustrates a cross-sectional view of a conventional planar magnetic micro-speaker 100.
  • the micro-speaker 100 includes a first magnet pair 110 and 115, a second magnet pair 111 and 116, a bottom plate (or frame) 130, a top plate (or frame) 131, a grill (or cover) 140, a diaphragm 150 with a surround 155, and voice coil 105.
  • the magnetic flux is formed between the first magnet pair 110 and 115 and the second magnet pair 111 and 116, and the voice coil 105.
  • the micro-speaker 100 has a vent(s) (or opening(s)) 160 that form a direct radiating type of speaker for direct radiation of sound.
  • the voice coil 105 of the micro-speaker 100 moves with the diaphragm 150 between the first magnet pair 110 and 115 and the second magnet pair 111 and 116 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • the bottom plate 130 and top plate 131 may be made of low carbon steel, soft magnetic steel, or similar material.
  • the first magnet pair 110 and 115 and the second magnet pair 111 and 116 may be comprised of rare earth magnetic material, such as: Neodymium (Nd), Nd Iron Boron (NdFeB), Samarium Cobalt, etc.
  • the structure material surrounding the micro-speaker 100 may be plastic, aluminum, etc.
  • FIG. 2 illustrates a cross-sectional view of an example conventional micro-speaker 200.
  • Micro-speaker 200 includes a first magnet 210, a second magnet 211, voice coil 205, a diaphragm 250 with a surround 255, a base plate 230, and top plate portions 231 and 235.
  • the voice coil 205 of the micro-speaker 200 moves with the diaphragm 250 between the gap between the top plate portions 231 and 235 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • FIG. 3 illustrates a cross-sectional view of an ultra-slim transducer 300, according to some embodiments.
  • the ultra-slim transducer 300 includes a magnet system including a lower (or bottom) magnet 310, (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), an upper (or top) magnet 315 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), a diaphragm 350 with suspension 355 (e.g., a torus, etc.), a voice coil 305 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), a bottom (or lower) plate 330 and top (or upper) plate 331, and structure 360 (e.g., low carbon steel, soft magnetic steel, plastic, aluminum, etc.).
  • a lower (or bottom) magnet 310 e.g., ring-
  • the lower magnet 310 and the upper magnet 315 may be comprised of rare earth magnetic material, such as: Nd, NdFeB, Samarium Cobalt, etc. In some embodiments, the lower magnet 310 and the upper magnet 315 have opposing polarity to increase the magnetic flux.
  • the bottom plate 330 and the top plate 331 may each be made of low carbon steel, soft magnetic steel, or similar material.
  • the diaphragm 350 may be made of paper, polypropylene (PP), polyetheretherketone (PEEK) polycarbonate (PC), Polyethylene Terephthalate (PET), silk, glass fiber, carbon fiber, titanium, aluminum, aluminum-magnesium alloy, nickel, beryllium, etc.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 331 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 331 houses the upper magnet 315.
  • the bottom plate 330 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower magnet 310.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 331 and at least partially disposed within the bottom plate 330. The voice coil 305 of the micro-speaker 300 moves with the diaphragm 350 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the ultra-slim transducer 300 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 300 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 300 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 300 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, personal digital assistants (PDAs), digital cameras, notebook computers, televisions (TVs), digital video disc players (DVDs), etc.
  • PDAs personal digital assistants
  • DVDs digital video disc players
  • FIG. 4 illustrates a cross-sectional view of a direct radiating ultra-slim transducer 400 with two magnet pairs, according to some embodiments.
  • the ultra-slim transducer 400 includes a two magnet pair system having a lower (or bottom) first magnet 410 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), an upper (or top) first magnet 415 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), a lower (or bottom) second magnet 411 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), an upper (or top) second magnet 416 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), a diaphragm 350 with suspension 355, a voice coil 305 (e.g., ring,
  • the lower first magnet 410, the upper first magnet 415, the lower first magnet 411 and the upper second magnet 416 may each be comprised of rare earth magnetic material, such as: Nd, NdFeB, Samarium Cobalt, etc.
  • the bottom plate 430 and the top plate 431 may each be made of low carbon steel, soft magnetic steel, or similar material.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 431 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 431 houses the upper first magnet 415 and the upper second magnet 416.
  • the bottom plate 430 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410 and the lower second magnet 411.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 431 and at least partially disposed within the bottom plate 430.
  • the voice coil 305 of the ultra-slim transducer 400 moves with the diaphragm 350 between the gap 451 between the upper first magnet 415 and the upper second magnet 416, and between the gap 450 between the lower first magnet 410 and the lower second magnet 411 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slot or venting of grill structure 460 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 440 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 400 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 400 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 400 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 400 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 5 illustrates a cross-sectional view of a slot firing ultra-slim transducer 500 with two magnet pairs, according to some embodiments.
  • the ultra-slim transducer 500 includes a two magnet pair system having a lower (or bottom) first magnet 410, an upper (or top) first magnet 415, a lower (or bottom) second magnet 411, an upper (or top) second magnet 416, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 430 and top (or upper) plate 431, and structure 465.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 431 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 431 houses the upper first magnet 415 and the upper second magnet 416.
  • the bottom plate 430 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410 and the lower second magnet 411.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 431 and at least partially disposed within the bottom plate 430.
  • the voice coil 305 of the micro-speaker 500 moves with the diaphragm 350 between the gap 451 between the upper first magnet 415 and the upper second magnet 416, and between the gap 450 between the lower first magnet 410 and the lower second magnet 411 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 540 and 545 radiate sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 and 545 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 500 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 500 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 500 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 500 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 6 illustrates a cross-sectional view of a slot firing ultra-slim transducer 600 with two magnet pairs, according to some embodiments.
  • the ultra-slim transducer 600 includes a two magnet pair system having a lower (or bottom) first magnet 610 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), an upper (or top) first magnet 615 (e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.), a lower (or bottom) second magnet 411, an upper (or top) second magnet 416, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 620 and top (or upper) plate 625, and structure 465.
  • a lower (or bottom) first magnet 610 e.g., ring-shaped, circular-shaped, cylindrical shaped, oval shaped, polygonal shaped, etc.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 625 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 625 houses the upper first magnet 415 and the upper second magnet 416.
  • the bottom plate 620 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410 and the lower second magnet 411.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 625 and at least partially disposed within the bottom plate 620.
  • the voice coil 305 of the micro-speaker 600 moves with the diaphragm 350 between the gap 451 between the upper first magnet 615 and the upper second magnet 416, and between the gap 450 between the lower first magnet 610 and the lower second magnet 411 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 540 and 545 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 and 545 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 600 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 600 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 600 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 600 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 7 illustrates an image 700 of magnetic flux for the ultra-slim transducer 600 of FIG. 6, according to some embodiments.
  • the magnetic flux curves show the flux generated by the lower (or bottom) first magnet 610, the upper (or top) first magnet 615, the lower (or bottom) second magnet 411 and the upper (or top) second magnet 416.
  • the lower (or bottom) first magnet 610, the upper (or top) first magnet 615, the lower (or bottom) second magnet 411 and the upper (or top) second magnet 416 are 52 Mega Gauss-Oersteds (MGOe).
  • FIG. 8A illustrates a graph 800 of flux through the magnetic coil 305 and speaker structure (bottom (or lower) plate 620 and top (or upper) plate 625, and structure 465) for the ultra-slim transducer 600 of FIG. 6, according to some embodiments.
  • FIG. 8B illustrates a graph 810 of flux through the speaker structure (bottom (or lower) plate 620 and top (or upper) plate 625, and structure 465) middle radially for the ultra-slim transducer 600 of FIG. 6, according to some embodiments.
  • FIG. 9 illustrates a cross-sectional view of a direct radiating ultra-slim transducer 900 with one magnet pair, according to some embodiments.
  • the ultra-slim transducer 900 includes a one magnet pair system having a lower (or bottom) first magnet 410, an upper (or top) first magnet 415, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 930 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), top (or upper) plate 931 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), a lower metallic structure 910 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), an upper metallic structure 911 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), and structure 465.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 931 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 931 houses the upper first magnet 415 and the upper metallic structure 911.
  • the bottom plate 930 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410 and the lower metallic structure 910.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 931 and at least partially disposed within the bottom plate 930.
  • the voice coil 305 of the micro-speaker 900 moves with the diaphragm 350 between the gap 451 between the upper first magnet 415 and the upper metallic structure 911, and between the gap 450 between the lower first magnet 410 and the lower metallic structure 910 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 440 radiate sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 440 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 900 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 900 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 900 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 900 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 10 illustrates a cross-sectional view of a slot firing ultra-slim transducer 1000 with one magnet pair, according to some embodiments.
  • the ultra-slim transducer 1000 includes a one magnet pair system having a lower (or bottom) first magnet 410, an upper (or top) first magnet 415, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 930, top (or upper) plate 931, a lower metallic structure 910, an upper metallic structure 911, and structure 465.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 931 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 931 houses the upper first magnet 415 and the upper metallic structure 911.
  • the bottom plate 930 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410 and the lower metallic structure 910.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 931 and at least partially disposed within the bottom plate 930.
  • the voice coil 305 of the micro-speaker 1000 moves with the diaphragm 350 between the gap 451 between the upper first magnet 415 and the upper metallic structure 911, and between the gap 450 between the lower first magnet 410 and the lower metallic structure 910 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 540 radiate sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 1000 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 1000 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 1000 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 1000 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 11 illustrates a cross-sectional view of a slot firing ultra-slim transducer 1100 with one disc magnet pair, according to some embodiments.
  • the ultra-slim transducer 1100 includes a lower (or bottom) first magnet 610, an upper (or top) first magnet 615, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 620, a top (or upper) plate 625, a lower metallic structure 910, an upper metallic structure 911, and structure 465.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 625 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 625 houses the upper first magnet 615 and the upper metallic structure 911.
  • the bottom plate 620 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 610 and the lower metallic structure 910.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 625 and at least partially disposed within the bottom plate 620.
  • the voice coil 305 of the micro-speaker 1100 moves with the diaphragm 350 between the gap 451 between the upper first magnet 615 and the upper metallic structure 911, and between the gap 450 between the lower first magnet 610 and the lower metallic structure 910 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 540 and 545 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 and 545 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 1100 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 1100 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 1100 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 1100 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 12 illustrates an image 1200 of magnetic flux for the ultra-slim transducer 1100 of FIG. 11, according to some embodiments.
  • the magnetic flux curves show the flux generated by the lower (or bottom) first magnet 610, the upper (or top) first magnet 615, the lower metallic structure 910 and the upper metallic structure 911.
  • the lower (or bottom) first magnet 610 and the upper (or top) first magnet 615 are 52 MGOe.
  • FIG. 13A illustrates a graph 1300 of flux through the magnetic coil 305 and speaker structure (bottom (or lower) plate 620 and top (or upper) plate 625, the lower metallic structure 910, the upper metallic structure 911, and the structure 465) for the ultra-slim transducer 1100 of FIG. 11, according to some embodiments.
  • FIG. 13B illustrates a graph 1310 of flux through the speaker structure (bottom (or lower) plate 620 and top (or upper) plate 625, the lower metallic structure 910, the upper metallic structure 911, and the structure 465) middle radially for the ultra-slim transducer 1100 of FIG. 11, according to some embodiments.
  • FIG. 14 illustrates a cross-sectional view of another direct radiating ultra-slim transducer 1400, according to some embodiments.
  • the ultra-slim transducer 1400 includes a two magnet pair system having a lower (or bottom) first magnet 410, an upper (or top) first magnet 415, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 1410 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), a top (or upper) plate 1411 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), grill structure 460 and metallic grill structure 1430 and structure 465.
  • the bottom plate 1410, the top plate 1411 and the metallic grill structure 1430 may each be made of low carbon steel, soft magnetic steel, or similar material.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 1411 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 1411 houses the upper first magnet 415.
  • the bottom plate 1410 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 1411 and at least partially disposed within the bottom plate 1410.
  • the voice coil 305 of the micro-speaker 1400 moves with the diaphragm 350 between the upper first magnet 415 and the lower first magnet 410 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slot or venting of the grill structure 460 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 440 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 1400 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 1400 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 1400 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 1400 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 15 illustrates a cross-sectional view of another slot firing ultra-slim transducer 1500, according to some embodiments.
  • the ultra-slim transducer 1500 includes a two magnet pair system having a lower (or bottom) first magnet 410, an upper (or top) first magnet 415, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 1410 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), a top (or upper) plate 1510 (e.g., ring-shaped, circular-shaped, oval-shaped, polygonal shaped, etc.), and structure 465.
  • the top plate 1510 may be made of low carbon steel, soft magnetic steel, or similar material.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 1510 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 1510 houses the upper first magnet 415.
  • the bottom plate 1410 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower first magnet 410.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 1510 and at least partially disposed within the bottom plate 1410.
  • the voice coil 305 of the micro-speaker 1500 moves with the diaphragm 350 between the upper first magnet 415 and the lower first magnet 410 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slot or venting 540 and 545 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 and 545 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 1500 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 1500 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 1500 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 1500 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 16 illustrates a cross-sectional view of yet another slot firing ultra-slim transducer 1600, according to some embodiments.
  • the ultra-slim transducer 1600 includes a magnet system including a lower (or bottom) magnet 610, an upper (or top) magnet 615, a diaphragm 350 with suspension 355, a voice coil 305, a bottom (or lower) plate 330, a top (or upper) plate 331, and structure 360.
  • the diaphragm 350 is centered (or substantially close to centered) on a vertical axis.
  • the top plate 331 is perpendicular (or substantially close to perpendicular) to the vertical axis.
  • the top plate 331 houses the upper magnet 615.
  • the bottom plate 330 is perpendicular (or substantially close to perpendicular) to the vertical axis, and houses the lower magnet 610.
  • the voice coil 305 has a height that is parallel to the vertical axis, and is at least partially disposed within the top plate 331 and at least partially disposed within the bottom plate 330.
  • the voice coil 305 of the micro-speaker 1600 moves with the diaphragm 350 upon receiving a sound signal (e.g., from an audio receiver, music player, television audio signal, etc.).
  • a sound signal e.g., from an audio receiver, music player, television audio signal, etc.
  • the slots or venting 540 and 545 radiates sound waves into the listening environment (e.g., a room, etc.).
  • the slot or venting 540 and 545 may be implemented for venting sound waves to the internal speaker volume.
  • the ultra-slim transducer 1600 may be implemented for a woofer, a midrange, a tweeter and full-range transducers.
  • the ultra-slim transducer 1600 can be made small enough to be built into cell phones, for example 4mm x 10mm x 15mm.
  • the ultra-slim transducer 1600 can also be made large enough to be used as a sub-woofer transducer, for example with a 300 mm diameter or larger.
  • the ultra-slim transducer 1600 may be implemented as a stand-alone unit or in devices and microelectronic equipment, such as mobile phones, camcorders, PDAs, digital cameras, notebook computers, TVs, DVDs, etc.
  • FIG. 17 illustrates an image 1700 of magnetic flux for the ultra-slim transducer 1600 of FIG. 16, according to some embodiments.
  • the magnetic flux curves show the flux generated by the lower (or bottom) first magnet 610 and the upper (or top) first magnet 615.
  • the lower (or bottom) first magnet 610 and the upper (or top) first magnet 615 are 52 MGOe.
  • FIG. 18A illustrates a graph 1800 of flux through the magnetic coil 305 and speaker structure (bottom (or lower) plate 330, top (or upper) plate 331, and the structure 360) for the ultra-slim transducer 1600 of FIG. 16, according to some embodiments.
  • FIG. 18B illustrates a graph 1810 of flux through a speaker structure (bottom (or lower) plate 330, top (or upper) plate 331, and the structure 360) middle radially for the ultra-slim transducer 1600 of FIG. 16, according to some embodiments.
  • FIG. 19 illustrates a process 1900 for designing a slim acoustic transducer, according to some embodiments.
  • the process 1900 provides for centering a diaphragm (e.g., diaphragm 350, FIGS. 3-6, 9-11 and 14-16) on a vertical axis.
  • the process 1900 provides for placing a first top plate (e.g., top plate 331, FIGS. 3 and 16, top plate 431, FIG. 4, top late 625, FIGS. 6 and 11, top plate 931, FIGS. 9 and 10, top plate 1411, FIGS. 5 and 14 or top plate 1510, FIG. 15) substantially perpendicular to the vertical axis.
  • a first top plate e.g., top plate 331, FIGS. 3 and 16, top plate 431, FIG. 4, top late 625, FIGS. 6 and 11, top plate 931, FIGS. 9 and 10, top plate 1411, FIGS. 5 and 14 or top plate 1510, FIG. 15
  • the process 1900 provides for housing a first upper magnet (e.g., upper magnet 315, FIG. 3, first magnet 415 or second magnet 416, FIGS. 4, 5, 9, 10, 14, 15, upper first magnet 615, FIGS. 6, 11, 16) within the first top plate.
  • a first bottom plate e.g., bottom plate 330, FIGS. 3 and 16, bottom plate 430, FIGS. 4 and 5, bottom plate 620, FIGS. 6 and 11, bottom plate 930, FIGS. 9 and 10, bottom plate 1410, FIGS. 14 and 15
  • a first lower magnet e.g., lower magnet 310, FIG.
  • placing a voice coil e.g., voice coil 305, FIGS. 3-6, 9-11 and 14-16
  • placing the voice coil includes at least partially disposing the voice coil within the first top plate and at least partially disposing the voice coil within the first bottom plate.
  • the process 1900 may be performed by using a robotic manufacturing system for the designing, various known manufacturing techniques, etc.
  • the elements/components for designing the slim acoustic transducer may be similar to the elements/components of FIGS. 3-6, 9-11 and 14-16, as described above).

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Un mode de réalisation de la présente invention concerne un transducteur acoustique mince doté d'une membrane qui est sensiblement centrée sur un axe vertical. Une première plaque supérieure est sensiblement perpendiculaire à l'axe vertical. La première plaque supérieure loge un premier aimant supérieur. Une première plaque inférieure est sensiblement perpendiculaire à l'axe vertical. La première plaque inférieure loge un premier aimant inférieur. Une bobine acoustique a une hauteur parallèle à l'axe vertical. La bobine acoustique est au moins partiellement disposée à l'intérieur de la première plaque supérieure et au moins partiellement disposée à l'intérieur de la première plaque inférieure.
PCT/KR2021/008397 2020-07-23 2021-07-02 Transducteur ultra-mince WO2022019519A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16/936,875 US11503411B2 (en) 2020-07-23 2020-07-23 Ultra slim transducer
US16/936,875 2020-07-23
KR1020210051372A KR20220012802A (ko) 2020-07-23 2021-04-20 초슬림 음향 트랜스듀서
KR10-2021-0051372 2021-04-20

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WO2022019519A1 true WO2022019519A1 (fr) 2022-01-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007158643A (ja) * 2005-12-05 2007-06-21 Fujitsu Ten Ltd スピーカ、スピーカ駆動装置
US20130228393A1 (en) * 2008-08-14 2013-09-05 Harman International Industries, Incorporated Phase plug and acoustic lens for direct radiating loudspeaker
KR101373427B1 (ko) * 2012-06-28 2014-03-13 두세진 진동판 직접 구동형 전자석 스피커
KR101707836B1 (ko) * 2014-08-25 2017-02-23 유옥정 슬림 스피커용 진동모듈 및 이를 포함하는 고성능 슬림 스피커
US20200100032A1 (en) * 2018-08-13 2020-03-26 Google Llc Reduced thickness actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007158643A (ja) * 2005-12-05 2007-06-21 Fujitsu Ten Ltd スピーカ、スピーカ駆動装置
US20130228393A1 (en) * 2008-08-14 2013-09-05 Harman International Industries, Incorporated Phase plug and acoustic lens for direct radiating loudspeaker
KR101373427B1 (ko) * 2012-06-28 2014-03-13 두세진 진동판 직접 구동형 전자석 스피커
KR101707836B1 (ko) * 2014-08-25 2017-02-23 유옥정 슬림 스피커용 진동모듈 및 이를 포함하는 고성능 슬림 스피커
US20200100032A1 (en) * 2018-08-13 2020-03-26 Google Llc Reduced thickness actuator

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