Patents by Inventor Youngmin A. Choi

Youngmin A. 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).

  • Publication number: 20190371260
    Abstract: An electronic device includes; a timing controller that generates a command to-be-sent to a display driver integrated circuit (DDI) selected from among a plurality of display driver integrated circuits (DDIs) connected to the timing controller through data lines and a shared channel. The DDI is selected by a DDI control signal transferred from the timing controller to the DDI through a corresponding data line among the data lines, and the command is transferred from the timing controller to the DDI through the shared channel.
    Type: Application
    Filed: January 15, 2019
    Publication date: December 5, 2019
    Inventors: KYONGHO KIM, JINHO KIM, JAEYOUL LEE, HYUNWOOK LIM, YOUNGMIN CHOI
  • Patent number: 10425104
    Abstract: Provided is a method of scheduling a parity check matrix, the method performed by a low-density parity-check (LDPC) decoder, the method including checking at least one non-zero elemental variable node in the parity check matrix, identifying a first index of a row of the parity check matrix in the at least one non-zero elemental variable node, extracting a column in which the at least one non-zero elemental variable node is positionable from the parity check matrix using the first index, and mapping the at least one non-zero elemental variable node to the extracted column based on an arrangement, and identifying a second index of the column of the parity check matrix through the mapped at least one non-zero elemental variable node.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: September 24, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Min Hyuk Kim, Youngmin Choi
  • Publication number: 20190276978
    Abstract: A clothes dryer is disclosed. The clothes dryer includes a rotatably disposed drum, a heat pump system including a compressor configured to compress a refrigerant and a condenser configured to condense the refrigerant, a heater configured to heat air supplied to the interior of the drum, a first temperature sensor configured to detect a temperature of air passing through the interior of the drum, a second temperature sensor configured to detect a temperature of the compressor, and a processor configured to control an operation of the compressor on the basis of the temperature of the air passing through the interior of the drum detected by the first temperature sensor and control an operation of the heater on the basis of the temperature of the compressor detected by the second temperature sensor.
    Type: Application
    Filed: February 25, 2019
    Publication date: September 12, 2019
    Inventors: Hyejoon SEOK, Sangoh YOO, Minjoon JUNG, Dohaeng KIM, Hyungwoo LEE, Seungeun CHUNG, Youngmin CHOI
  • Publication number: 20180357946
    Abstract: A display driving device is disclosed which includes a source driver that supplies voltages to source lines connected to pixels, detects a slew time of the voltages of the source lines, and outputs the slew time, and a timing controller that receives the slew time from the source driver and updates a way for the source driver to control the voltages depending on the slew time.
    Type: Application
    Filed: January 11, 2018
    Publication date: December 13, 2018
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: KeunHo RYU, Byungkoan Kim, Jong-Hee Na, Yong-Yun Park, Seunghwan Baek, MyeongJun Chae, YoungMin Choi
  • Publication number: 20180138924
    Abstract: Provided is a method of scheduling a parity check matrix, the method performed by a low-density parity-check (LDPC) decoder, the method including checking at least one non-zero elemental variable node in the parity check matrix, identifying a first index of a row of the parity check matrix in the at least one non-zero elemental variable node, extracting a column in which the at least one non-zero elemental variable node is positionable from the parity check matrix using the first index, and mapping the at least one non-zero elemental variable node to the extracted column based on an arrangement, and identifying a second index of the column of the parity check matrix through the mapped at least one non-zero elemental variable node.
    Type: Application
    Filed: November 10, 2017
    Publication date: May 17, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Min Hyuk KIM, Youngmin CHOI
  • Patent number: 9959835
    Abstract: A clock and data recovery circuit in accordance with an embodiment of the inventive concept includes a phase locked loop configured to receive a data stream into which an additional bit is inserted at every reference period to generate parallelized data and a clock signal, and a first detector circuit configured to determine whether the parallelized data is locked based on a bit-conversion of the data stream according to an insertion of the additional bit. The bit-conversion is executed with respect to the additional bits according to a predetermined protocol, or is executed with respect to at least one bit from among data of the data stream between a current one of the additional bits and a next one of the additional bits.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: May 1, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-Hoon Baek, Hyunwook Lim, Kwi Sung Yoo, Eun-Young Jin, Kyongho Kim, JaeYoul Lee, Youngmin Choi
  • Publication number: 20170116954
    Abstract: A clock and data recovery circuit in accordance with an embodiment of the inventive concept includes a phase locked loop configured to receive a data stream into which an additional bit is inserted at every reference period to generate parallelized data and a clock signal, and a first detector circuit configured to determine whether the parallelized data is locked based on a bit-conversion of the data stream according to an insertion of the additional bit. The bit-conversion is executed with respect to the additional bits according to a predetermined protocol, or is executed with respect to at least one bit from among data of the data stream between a current one of the additional bits and a next one of the additional bits.
    Type: Application
    Filed: September 21, 2016
    Publication date: April 27, 2017
    Inventors: Dong-Hoon BAEK, Hyunwook LIM, Kwi Sung YOO, Eun-Young JIN, Kyongho KIM, JaeYoul LEE, Youngmin CHOI
  • Publication number: 20110132574
    Abstract: The present invention relates to a hydrogen storage system using a hydrogen storage material and can increase a heat exchanging efficiency by improving a contact frequency to the heat exchanger by vibrating the heat exchanger that is mounted in the hydrogen storage tank using the hydrogen storage material by using a vibrator to induce resonance vibration of the packed storage material powder.
    Type: Application
    Filed: August 19, 2010
    Publication date: June 9, 2011
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Hoonhui Lee, Hyungki Kim, Youngmin Choi
  • Publication number: 20110083756
    Abstract: The present invention provides a compressed gas safety discharge system preventing a pressure vessel from breaking and exploding by appropriately and timely operating a pressure relief device, conditions of a fire, such as when a fire occurs around the pressure vessel far from the pressure relief device as well as close to the pressure relief device.
    Type: Application
    Filed: August 19, 2010
    Publication date: April 14, 2011
    Applicant: Hyundai Motor Company
    Inventors: Kiho Hwang, Hyungki Kim, Sanghyun Kim, Hoonhui Lee, Youngmin Choi, Gyujin Jang
  • Patent number: 7839059
    Abstract: The Inner-Forcer milli-Hemispherical Resonator Gyro (mHRG) is a small, low cost, high performance gyroscope. It may have an extremely simplified design, with in one embodiment of the present method and apparatus only five major parts total, with most parts filling multiple functions. The method and apparatus in one embodiment may have: a resonator; and a body operatively coupled to the resonator, the unitary body integrally having electrodes, an electrode support unit, a weld ring and a plurality of electrically conductive pins, the plurality of electrodes operatively coupled to the electrically conductive pins.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: November 23, 2010
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventors: Youngmin A. Choi, David M. Rozelle
  • Patent number: 7607350
    Abstract: A circuit board mounting system in one example comprises an improved mounting system for a circuit board disposed between housing elements, wherein the improvement comprises a plurality of slots formed in the circuit board and a plurality of bushings disposed within the slots, such that the housing elements rest on opposed ends of the bushings, and the circuit board moves in a plane substantially parallel to its mounting surfaces in response to changes in temperature, thus reducing thermal stress.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: October 27, 2009
    Assignee: Northrop Grumman Guidance and Electronics Company, Inc.
    Inventor: Youngmin A. Choi
  • Publication number: 20090232450
    Abstract: A novel Fabry-Perot resonance cavity has been recognized. This cavity is formed by simple planar and concave mirrors that attached at the fiber ends. The concave mirror is precisely aligned to the core of the fiber. The concave lens is fabricated on the thin polymer film by making an indentation of correct geometry and smoothness. The concave mirror has multiple dielectric layers applied on the concave lens to achieve the final, desired optical characteristics.
    Type: Application
    Filed: April 28, 2008
    Publication date: September 17, 2009
    Inventor: Youngmin A. Choi
  • Publication number: 20090060415
    Abstract: A novel Fabry-Perot resonance cavity has been recognized. This cavity is formed by simple planar and concave mirrors that attached at the fiber ends. The concave mirror is precisely aligned to the core of the fiber. The concave lens is fabricated on the thin polymer film by making an indentation of correct geometry and smoothness. The concave mirror has multiple dielectric layers applied on the concave lens to achieve the final, desired optical characteristics.
    Type: Application
    Filed: February 21, 2008
    Publication date: March 5, 2009
    Inventor: Youngmin A. Choi
  • Publication number: 20090031832
    Abstract: The Inner-Forcer milli-Hemispherical Resonator Gyro (mHRG) is a small, low cost, high performance gyroscope. It may have an extremely simplified design, with in one embodiment of the present method and apparatus only five major parts total, with most parts filling multiple functions. The method and apparatus in one embodiment may have: a resonator; and a body operatively coupled to the resonator, the unitary body integrally having electrodes, an electrode support unit, a weld ring and a plurality of electrically conductive pins, the plurality of electrodes operatively coupled to the electrically conductive pins.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 5, 2009
    Inventors: Youngmin A. Choi, David M. Rozelle
  • Publication number: 20080217797
    Abstract: A novel A SIMPLE FIBER OPTIC MICRO CONCAVE MIRROR has been recognized. This mirror is formed by making a precision micro lens in a material deposited on the end of an optical fiber held in a suitable fiber ferrule. Multiple dielectric layers are applied on the lens to achieve the final, desired optical characteristic of the mirror. The concave mirror is precisely aligned to the core of the fiber. The concave lens is fabricated on the end of the fiber by making an indentation of correct geometry and smoothness.
    Type: Application
    Filed: February 21, 2008
    Publication date: September 11, 2008
    Inventor: Youngmin A. Choi
  • Patent number: 7255487
    Abstract: A novel Fabry-Perot resonance cavity has been recognized with ruggedized packaging. This cavity is formed by simple planar and concave (or two concave) mirrors—attached at the fiber ends. The concave mirror is precisely aligned to the core of the fiber. The concave lens is fabricated on the end of the fiber by making an indentation of correct geometry and smoothness. The concave mirror has multiple dielectric layers applied on the concave lens to achieve the final, desired optical characteristics. This structure is packaged using novel techniques from which it derives great utility. The resulting packaged assembly is environmentally robust and capable of operating at very high frequencies with low input voltages.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: August 14, 2007
    Inventor: Youngmin A. Choi
  • Patent number: 7222532
    Abstract: A packaging system in one example comprises an improved mechanical packaging system for a circuit board disposed between housing elements, the improvement comprising an upper housing member having a centrally disposed opening provided therethrough, a unitary electromagnetic shield disposed on at least an upper surface of the circuit board and secured to the circuit board, the unitary electromagnetic shield secured to the upper housing member, such that undesired mechanical vibration modes are substantially reduced.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: May 29, 2007
    Assignee: Northrop Grumman Corporation
    Inventor: Youngmin A. Choi
  • Publication number: 20070081317
    Abstract: A circuit board mounting system in one example comprises an improved mounting system for a circuit board disposed between housing elements, wherein the improvement comprises a plurality of slots formed in the circuit board and a plurality of bushings disposed within the slots, such that the housing elements rest on opposed ends of the bushings, and the circuit board moves in a plane substantially parallel to its mounting surfaces in response to changes in temperature, thus reducing thermal stress.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Inventor: Youngmin Choi
  • Publication number: 20070079654
    Abstract: A packaging system in one example comprises an improved mechanical packaging system for a circuit board disposed between housing elements, the improvement comprising an upper housing member having a centrally disposed opening provided therethrough, a unitary electromagnetic shield disposed on at least an upper surface of the circuit board and secured to the circuit board, the unitary electromagnetic shield secured to the upper housing member, such that undesired mechanical vibration modes are substantially reduced.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Inventor: Youngmin Choi
  • Patent number: 7038293
    Abstract: An apparatus in one example comprises a wafer portion that comprises a conduction layer. Upon exposure of the conduction layer during a etch of the wafer portion, the conduction layer serves to dissipate a portion of a charge buildup on the wafer portion during an etch of the wafer portion.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: May 2, 2006
    Assignee: Northrop Grumman Corp.
    Inventors: Youngmin A. Choi, Christine Geosling, Henry Abbink