Patents by Inventor Kil Dong Park
Kil Dong Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220210574Abstract: Provided is a diaphragm for a high water pressure waterproof microspeaker. The diaphragm for a waterproof microspeaker includes an annular dome portion formed of an elastic membrane material and having a dome portion protruding upward or downward, an annular outer periphery portion attached to an outer periphery of the dome portion and injection-molded with a material having rigidity, an annular inner periphery portion attached to an inner periphery of the dome portion and injection-molded with a material having rigidity, and a center diaphragm attached to a center of the inner periphery portion, wherein the outer periphery portion and the inner periphery portion are attached to an edge portion by double-shot injection molding.Type: ApplicationFiled: December 28, 2021Publication date: June 30, 2022Inventors: Cheon Myeong Kim, Ji Hoon Kim, Jong Soo Yoon, Kil Dong Park, Gi Hun Song, Tae Hyun Park
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Publication number: 20180063637Abstract: The present invention discloses a side diaphragm with a waterproof function that can resist a water pressure over 1 atm. According to the present invention, there is provided a side diaphragm with a waterproof function that is provided in a microspeaker, the side diaphragm including a planar center portion, a planar outer peripheral portion, and a ring-shaped dome portion projecting upward between the center portion and the outer peripheral portion, wherein there is no perforated part and the dome portion does not have additional pleats.Type: ApplicationFiled: August 22, 2017Publication date: March 1, 2018Inventors: Ji Hun Choi, Kil Dong Park, Sung Jun Lee, Jung Heon Kim
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Patent number: 9832557Abstract: A microspeaker includes a frame, magnetic circuit, voice coil configured to generate vibration by mutual electromagnetic force with the magnetic circuit, vibration plate configured to vibrate together according to the vibration of the voice coil to generate a sound, and suspension configured to guide a vibration direction of the vibration plate and voice coil. The suspension has a central portion attached to the voice coil, an annular outer circumferential portion formed to be spaced apart from the central portion by a predetermined interval, and a connection portion connecting the central and outer circumferential portions and configured to perform a damping function. The central portion has an outer end having the same height as the connection and outer circumferential portions, an inner end positioned to be higher than the outer end, and a step portion connecting the outer end and inner end. The voice coil is attached to the inner end.Type: GrantFiled: December 14, 2015Date of Patent: November 28, 2017Assignee: EM-TECH. Co., Ltd.Inventors: Kil Dong Park, Seul Ki Nam, Ji Hoon Kim, Min Chang Kim
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Patent number: 9473837Abstract: The present invention discloses a sound transducer with a ventilation structure capable of securing a flow path of air introduced from within and outside of the sound transducer to the maximum. The sound transducer with a ventilation structure includes a frame, a magnetic circuit installed within the frame, a voice coil vibrating according to mutual electromagnetic force with the magnetic circuit upon receiving an electrical signal, a vibration plate vibrating according to vibrations of the voice coil to generate a sound, and a drain hole formed to be adjacent to the corner of the frame and allowing air to flow between the interior and exterior of the frame.Type: GrantFiled: October 25, 2013Date of Patent: October 18, 2016Assignee: Em-Tech. Co., Ltd.Inventors: Kyu Dong Choi, Kil Dong Park, Ji Hoon Kim, Joong Hak Kwon
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Publication number: 20160173990Abstract: A microspeaker includes a frame, magnetic circuit, voice coil configured to generate vibration by mutual electromagnetic force with the magnetic circuit, vibration plate configured to vibrate together according to the vibration of the voice coil to generate a sound, and suspension configured to guide a vibration direction of the vibration plate and voice coil. The suspension has a central portion attached to the voice coil, an annular outer circumferential portion formed to be spaced apart from the central portion by a predetermined interval, and a connection portion connecting the central and outer circumferential portions and configured to perform a damping function. The central portion has an outer end having the same height as the connection and outer circumferential portions, an inner end positioned to be higher than the outer end, and a step portion connecting the outer end and inner end. The voice coil is attached to the inner end.Type: ApplicationFiled: December 14, 2015Publication date: June 16, 2016Inventors: Kil Dong Park, Seul Ki Nam, Ji Hoon Kim, Min Chang Kim
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Patent number: 9088840Abstract: The present invention relates to a vibration module for a sound transducer and, more particularly, to a vibration module for a sound transducer which can prevent sound leakage by minimizing contacts between a diaphragm and a voice coil. The vibration module for the sound transducer according to the present invention comprises: a substrate having an inner portion and an outer portion, an electrical connection portion for applying electrical signals to a voice coil being provided on the inner portion and a terminal being provided on the outer portion, for performing electrical connection between the electrical connection portion and the terminal; a first diaphragm attached between the inner portion and outer portion of the substrate; and the voice coil mounted on the inside of the inner portion of the substrate with a certain distance from the first diaphragm and electrically connected to the electrical connection portion.Type: GrantFiled: October 25, 2013Date of Patent: July 21, 2015Assignee: EM-TECH. Co., Ltd.Inventors: Kyu Dong Choi, Kil Dong Park, In Ho Jeong, Joong Hak Kwon
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Publication number: 20140119578Abstract: The present invention relates to a vibration module for a sound transducer and, more particularly, to a vibration module for a sound transducer which can prevent sound leakage by minimizing contacts between a diaphragm and a voice coil. The vibration module for the sound transducer according to the present invention comprises: a substrate having an inner portion and an outer portion, an electrical connection portion for applying electrical signals to a voice coil being provided on the inner portion and a terminal being provided on the outer portion, for performing electrical connection between the electrical connection portion and the terminal; a first diaphragm attached between the inner portion and outer portion of the substrate; and the voice coil mounted on the inside of the inner portion of the substrate with a certain distance from the first diaphragm and electrically connected to the electrical connection portion.Type: ApplicationFiled: October 25, 2013Publication date: May 1, 2014Applicant: EM-TECH. CO., LTD.Inventors: Kyu Dong Choi, Kil Dong Park, In Ho Jeong, Joong Hak Kwon
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Publication number: 20140119592Abstract: The present invention discloses a sound transducer with a ventilation structure capable of securing a flow path of air introduced from within and outside of the sound transducer to the maximum. The sound transducer with a ventilation structure includes a frame, a magnetic circuit installed within the frame, a voice coil vibrating according to mutual electromagnetic force with the magnetic circuit upon receiving an electrical signal, a vibration plate vibrating according to vibrations of the voice coil to generate a sound, and a drain hole formed to be adjacent to the corner of the frame and allowing air to flow between the interior and exterior of the frame.Type: ApplicationFiled: October 25, 2013Publication date: May 1, 2014Applicant: EM-TECH. CO., LTD.Inventors: Kyu Dong Choi, Kil Dong Park, Ji Hoon Kim, Joong Hak Kwon