Patents by Inventor Chun Choi
Chun Choi 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: 20200321845Abstract: A vibration generating apparatus includes a bracket coupled to a rectangular case to form an inner space, a stator including a circuit board coupled to an upper surface of the bracket and a coil connected to the circuit board, a vibrator including a permanent magnet arranged on an exterior of the coil and a weighted body coupled to an outer circumferential surface of the permanent magnet, and an elastic member connecting the stator and the vibrator and elastically supporting the vibrator. The weighted body is polyhedral, and the vibrator moves up-and-down.Type: ApplicationFiled: August 4, 2017Publication date: October 8, 2020Applicant: JAHWA ELECTRONICS CO., LTD.Inventors: Nam Jin CHOI, Kyung Hoon JO, Soon Koo SHIM, Young Bin CHONG, Chun CHOI, Won Gook LEE, Min Goo LEE
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Patent number: 10381910Abstract: A linear vibration generating device, which includes a stator fixed on a bracket and having a center yoke concentrically fixed in an inner space of coil winding units and at least one blade extending from the center yoke in a direction perpendicular to the concentric axis, and a vibrator having a magnet surrounding outer circumferences of the coil winding units, and an elastic body disposed between the stator and the vibrator. The blade has at least one passage through which a coil wire for electrically connecting the coil winding units passes.Type: GrantFiled: November 25, 2015Date of Patent: August 13, 2019Assignee: JAHWA electronics Co., Ltd.Inventors: Soon Koo Shim, Young Bin Chong, Chun Choi, Won Gook Lee, Min Goo Lee
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Patent number: 10323192Abstract: The present technology is generally directed to systems and methods for improving quenched coke recovery. More specifically, some embodiments are directed to systems and methods utilizing one or more of a screen, barrier, or reflector panel to contain or redirect coke during or after quenching. In a particular embodiment, a quench car system for containing coke includes a quench car having a base, a plurality of sidewalls, and a top portion. The system can further include a permeable barrier covering at least a portion of the top of the quench car, wherein the permeable barrier has a plurality of apertures therethrough.Type: GrantFiled: December 4, 2017Date of Patent: June 18, 2019Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: John Francis Quanci, Bradley Thomas Rodgers, Khambath Vichitvongsa, Chun Choi, Matt William Gill
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Patent number: 10006421Abstract: A fuel filter for a diesel engine may include an upper cover forming inflow and outflow passages of diesel fuel, a housing integrally mounted in a vehicle body, coupled to the upper cover and housing a filter assembly, and a body penetrating a central portion of the filter assembly, disposed between the upper cover and the filter assembly and integrally forming the upper cover, a heater assembly, and a moisture sensor, in which the heater assembly may be configured to selectively operate according to a detection signal of a fuel temperature sensor that is provided in the engine body.Type: GrantFiled: August 28, 2015Date of Patent: June 26, 2018Assignees: Hyundai Motor Company, Mann+Hummel GmbHInventors: Chang Ho Ham, Dong Myoung Ryoo, Jae Hyub Hyun, Seung Chun Choi, Han Poong Lee
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Patent number: 10009166Abstract: A hybrid clock data recovery circuit includes a linear phase detector configured to generate a recovered data signal by sampling an input data signal in response to a clock signal, and to generate up and down signals having a pulse width difference that is linearly proportional to a phase difference between the input data signal and the clock signal. An arbiter is configured to generate a bang-bang up signal representing that a phase of the input data signal leads a phase of the clock signal and a bang-bang down signal representing that the phase of the clock signal leads the phase of the input data signal based on the up and down signals. A digital loop filter is configured to generate a digital control code based on the bang-bang up and down signals. A digitally controlled oscillator is configured to generate an oscillating frequency of the clock signal in response to the digital control code, and to adjust the oscillating frequency of the clock signal in response to the up and down signals.Type: GrantFiled: May 23, 2017Date of Patent: June 26, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kwang-Chun Choi, Jong-Shin Shin, Sung-Jun Kim, Hye-Yeon Yang, Byung-Hyun Lim, Woo-Chul Jung
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Publication number: 20180166960Abstract: A linear vibration generating device, which includes a stator fixed on a bracket and having a center yoke concentrically fixed in an inner space of coil winding units and at least one blade extending from the center yoke in a direction perpendicular to the concentric axis, and a vibrator having a magnet surrounding outer circumferences of the coil winding units, and an elastic body disposed between the stator and the vibrator. The blade has at least one passage through which a coil wire for electrically connecting the coil winding units passes.Type: ApplicationFiled: November 25, 2015Publication date: June 14, 2018Applicant: JAHWA electronics Co., Ltd.Inventors: Soon Koo SHIM, Young Bin CHONG, Chun Choi, Won Gook LEE, Min Goo LEE
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Publication number: 20180155627Abstract: The present technology is generally directed to systems and methods for improving quenched coke recovery. More specifically, some embodiments are directed to systems and methods utilizing one or more of a screen, barrier, or reflector panel to contain or redirect coke during or after quenching. In a particular embodiment, a quench car system for containing coke includes a quench car having a base, a plurality of sidewalls, and a top portion. The system can further include a permeable barrier covering at least a portion of the top of the quench car, wherein the permeable barrier has a plurality of apertures therethrough.Type: ApplicationFiled: December 4, 2017Publication date: June 7, 2018Inventors: John Francis Quanci, Bradley Thomas Rodgers, Khambath Vichitvongsa, Chun Choi, Matt William Gill
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Publication number: 20180152283Abstract: A hybrid clock data recovery circuit includes a linear phase detector configured to generate a recovered data signal by sampling an input data signal in response to a clock signal, and to generate up and down signals having a pulse width difference that is linearly proportional to a phase difference between the input data signal and the clock signal. An arbiter is configured to generate a bang-bang up signal representing that a phase of the input data signal leads a phase of the clock signal and a bang-bang down signal representing that the phase of the clock signal leads the phase of the input data signal based on the up and down signals. A digital loop filter is configured to generate a digital control code based on the bang-bang up and down signals. A digitally controlled oscillator is configured to generate an oscillating frequency of the clock signal in response to the digital control code, and to adjust the oscillating frequency of the clock signal in response to the up and down signals.Type: ApplicationFiled: May 23, 2017Publication date: May 31, 2018Inventors: Kwang-Chun Choi, Jong-Shin Shin, Sung-Jun Kim, Hye-Yeon Yang, Byung-Hyun Lim, Woo-Chul Jung
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Patent number: 9913364Abstract: A printed circuit board includes a pad to receive an electric signal from a controller, a plurality of signal lines connected to the pad to transmit the electric signal received at the pad, and a signal transmission unit connected to the signal lines to transmit the electric signal to a coil. The plurality of signal lines are configured to face each other in at least a partial region and/or disposed in a zigzag form in at least a partial region. If the printed circuit board and a vibration actuator including the printed circuit board are used, it is possible to change a high frequency interference region according to a pattern by changing a pattern of the printed circuit board, and to improve receiving efficiency of an antenna by reducing high frequency noise.Type: GrantFiled: March 17, 2017Date of Patent: March 6, 2018Assignee: JAHWA ELECTRONICS CO., LTD.Inventors: Chun Choi, Soon Koo Shim, Young Bin Chong, Nam Jin Choi, Won Gook Lee, Min Goo Lee, Kyung Hoon Jo
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Publication number: 20180042102Abstract: A printed circuit board includes a pad to receive an electric signal from a controller, a plurality of signal lines connected to the pad to transmit the electric signal received at the pad, and a signal transmission unit connected to the signal lines to transmit the electric signal to a coil. The plurality of signal lines are configured to face each other in at least a partial region and/or disposed in a zigzag form in at least a partial region. If the printed circuit board and a vibration actuator including the printed circuit board are used, it is possible to change a high frequency interference region according to a pattern by changing a pattern of the printed circuit board, and to improve receiving efficiency of an antenna by reducing high frequency noise.Type: ApplicationFiled: March 17, 2017Publication date: February 8, 2018Inventors: Chun CHOI, Soon Koo SHIM, Young Bin CHONG, Nam Jin CHOI, Won Gook LEE, Min Goo LEE, Kyung Hoon JO
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Publication number: 20160138538Abstract: A fuel filter for a diesel engine may include an upper cover forming inflow and outflow passages of diesel fuel, a housing integrally mounted in a vehicle body, coupled to the upper cover and housing a filter assembly, and a body penetrating a central portion of the filter assembly, disposed between the upper cover and the filter assembly and integrally forming the upper cover, a heater assembly, and a moisture sensor, in which the heater assembly may be configured to selectively operate according to a detection signal of a fuel temperature sensor that is provided in the engine body.Type: ApplicationFiled: August 28, 2015Publication date: May 19, 2016Applicants: Hyundai Motor Company, Mann Hummel Korea Co., Ltd.Inventors: Chang Ho Ham, Dong Myoung RYOO, Jae Hyub HYUN, Seung Chun CHOI, Han Poong LEE
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Patent number: 9048849Abstract: The inventive concept relates to a supply regulated voltage controlled oscillator having a function of an active loop filter by sharing one operational amplifier without additional use of active elements in a supply regulated voltage controlled oscillator using an operational amplifier as a supply regulator, and a phase locked loop using the same.Type: GrantFiled: June 25, 2013Date of Patent: June 2, 2015Assignee: Industry-Academic Cooperation Foundation, Yonsei UniversityInventors: Woo-Young Choi, Kwang-Chun Choi
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Patent number: 9027200Abstract: Provided is an upright vacuum cleaner. The upright vacuum cleaner includes a suction nozzle comprising a plurality of wheels, a main body relatively rotatable with respect to the suction nozzle, and a steering device steering the plurality of wheels to correspond to the movement of the main body.Type: GrantFiled: February 9, 2010Date of Patent: May 12, 2015Assignee: LG Electronics Inc.Inventors: Chung-Ook Chong, Kyu-Chun Choi, Geun-Bae Hwang, Chang-Hwa Sun
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Patent number: 9025965Abstract: Disclosed are a phase locked loop (PLL) of a digital scheme and a method thereof. More specifically, disclosed are a digital phase locked loop having a time-to-digital converter (TDC), a digital loop filter (DLF), and a digitally controlled oscillator (DCO), and that is designed to have a constant jitter characteristic at all times even though an operating condition of a circuit varies according to a process, voltage, temperature (PVT) change, and a method thereof.Type: GrantFiled: December 22, 2011Date of Patent: May 5, 2015Assignee: Electronics and Telecommunications Research InstituteInventors: Seung Woo Lee, Kwang Chun Choi, Woo Young Choi, Bhum Cheol Lee
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Publication number: 20140085011Abstract: The inventive concept relates to a supply regulated voltage controlled oscillator having a function of an active loop filter by sharing one operational amplifier without additional use of active elements in a supply regulated voltage controlled oscillator using an operational amplifier as a supply regulator, and a phase locked loop using the same.Type: ApplicationFiled: June 25, 2013Publication date: March 27, 2014Inventors: Woo-Young Choi, Kwang-Chun Choi
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Patent number: 8613125Abstract: The present embodiments relate to a vacuum cleaner. The vacuum cleaner according to present embodiments includes a main body; a wheel for moving the main body; a driving unit for driving the wheel; a sensor for sensing movement of the main body; and a controller for controlling the driving unit according to data sensed by the sensor.Type: GrantFiled: March 14, 2008Date of Patent: December 24, 2013Assignee: LG Electronics Inc.Inventors: Kyeong-Seon Jeong, Kyu-Chun Choi, Geun-Bae Hwang, Chang-Hwa Sun, Ju-Young Min, Chung-Ook Chong
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Patent number: 8434194Abstract: A nozzle for a vacuum cleaner is provided, the nozzle having a structure in which suction performance may be improved. The nozzle may include a nozzle body, and an agitator rotatably installed in the nozzle body. Air may follow a first flow path through the nozzle, and a second flow path which diverges from the second flow path at the agitator, so as to uniformly distribute air flow through the nozzle.Type: GrantFiled: May 14, 2010Date of Patent: May 7, 2013Assignee: LG Electronics Inc.Inventors: Kyeong Seon Jeong, Geun Bae Hwang, Kie Tak Hyun, Kyu Chun Choi, Chang Hwa Sun
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Publication number: 20120198652Abstract: Provided is an upright vacuum cleaner. The upright vacuum cleaner includes a suction nozzle comprising a plurality of wheels, a main body relatively rotatable with respect to the suction nozzle, and a steering device steering the plurality of wheels to correspond to the movement of the main body.Type: ApplicationFiled: February 9, 2010Publication date: August 9, 2012Inventors: Chung-Ook Chong, Kyu-Chun Choi, Geun-Bae Hwang, Chang-Hwa Sun
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Publication number: 20120161834Abstract: Disclosed are a phase locked loop (PLL) of a digital scheme and a method thereof. More specifically, disclosed are a digital phase locked loop having a time-to-digital converter (TDC), a digital loop filter (DLF), and a digitally controlled oscillator (DCO), and that is designed to have a constant jitter characteristic at all times even though an operating condition of a circuit varies according to a process, voltage, temperature (PVT) change, and a method thereof.Type: ApplicationFiled: December 22, 2011Publication date: June 28, 2012Applicant: Electronics and Telecommunication Research InstituteInventors: Seung Woo LEE, Kwang Chun CHOI, Woo Young CHOI, Bhum Cheol LEE
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Patent number: D691305Type: GrantFiled: February 20, 2013Date of Patent: October 8, 2013Assignee: GM Global Technology Operations, LLCInventor: Jin-chun Choi