Patents by Inventor Jihan Ryu
Jihan Ryu 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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Patent number: 11955077Abstract: An electronic device may include: a housing; a display which is viewed through at least a portion of the housing and which displays a screen image by using a plurality of pixels; a display driving circuit for providing, to the display, a data voltage an emission signal for driving each of the plurality of pixels; and a processor operationally connected to the display and the display driving circuit. The processor can be configured to set a first frame driven by the display, and the display driving circuit can be configured to set a first period in which the data voltage is supplied to a first transistor in each of the plurality of pixels and a second period in which the data voltage written in the first period is maintained and to change the initialization voltage to be supplied to the plurality of pixels in the second period. Various other embodiments identified from the specification are also possible.Type: GrantFiled: July 6, 2022Date of Patent: April 9, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Namhyeon Jeon, Jitae Kim, Sungwon Ryu, Hyunchang Shin, Gyudong Eom, Youngman Lee, Jihan Lee
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Patent number: 10296021Abstract: The present subject matter relates to systems and methods for active vibration control system speed monitoring and control in which a speed protection monitor configured to receive index pulses as inputs to monitor the speed of one or more force generators. A rotary actuator control system can be connected in communication with the speed protection monitor and the one or more force generators, wherein the rotary actuator control system is configured to shut down or adjust the speed of the one or more force generators if the one or more force generators are determined to be operating at undesired speeds.Type: GrantFiled: January 17, 2014Date of Patent: May 21, 2019Assignee: LORD CorporationInventors: Doug A. Swanson, Paul R. Black, David Clark, Matthew K. Ferguson, Jihan Ryu
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Patent number: 9878781Abstract: Improved active vibration control (AVC) devices, systems, and related methods are provided herein. An AVC device includes a controller adapted to receive real-time aircraft information and adjust at least one control parameter as a function of the real-time aircraft information is provided. An AVC device is adapted to detect changes in real-time aircraft information, as the aircraft moves from a steady state to transient performance, low and high air speeds, or vice versa. An AVC system (e.g., AVCS) includes one or more sensors, one or more actuators, and a controller adapted to receive real-time aircraft information and adjust at least one control parameter. In some aspects, a method of controlling vibration within an aircraft includes receiving vibration information from at least one sensor, receiving real-time aircraft information from an avionics system, adjusting at least one control parameter used in a control algorithm, and generating a force command.Type: GrantFiled: May 24, 2016Date of Patent: January 30, 2018Assignee: LORD CorporationInventors: Doug A. Swanson, Paul R. Black, Jihan Ryu, Stephen C. Southward, Doug G. Pedersen
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Patent number: 9701402Abstract: Improved active vibration control (AVC) devices (20), systems, and related methods are provided herein. An AVC device (20) includes a controller (24) adapted to receive real-time aircraft information and adjust at least one control parameter as a function of the real-time aircraft information is provided. An AVC device is adapted to detect changes in real-time aircraft information, as the aircraft moves from a steady state to transient performance, low and high air speeds, or vice versa. An AVC system (e.g., AVCS) includes one or more sensors (22), one or more actuators (26), and a controller (24) adapted to receive real-time aircraft information and adjust at least one control parameter. In some aspects, a method of controlling vibration within an aircraft includes receiving vibration information from at least one sensor (22), receiving real-time aircraft information from an avionics system (40), adjusting at least one control parameter used in a control algorithm, and generating a force command.Type: GrantFiled: January 17, 2014Date of Patent: July 11, 2017Assignee: LORD CorporationInventors: Doug A. Swanson, Paul R. Black, Jihan Ryu, Stephen C. Southward, Doug G. Pedersen
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Publication number: 20170008620Abstract: Improved active vibration control (AVC) devices, systems, and related methods are provided herein. An AVC device includes a controller adapted to receive real-time aircraft information and adjust at least one control parameter as a function of the real-time aircraft information is provided. An AVC device is adapted to detect changes in real-time aircraft information, as the aircraft moves from a steady state to transient performance, low and high air speeds, or vice versa. An AVC system (e.g., AVCS) includes one or more sensors, one or more actuators, and a controller adapted to receive real-time aircraft information and adjust at least one control parameter. In some aspects, a method of controlling vibration within an aircraft includes receiving vibration information from at least one sensor, receiving real-time aircraft information from an avionics system, adjusting at least one control parameter used in a control algorithm, and generating a force command.Type: ApplicationFiled: May 24, 2016Publication date: January 12, 2017Inventors: Doug A. SWANSON, Paul R. BLACK, Jihan RYU, Steve C. SOUTHWARD, Doug G. PEDERSEN
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Patent number: 9409518Abstract: A system for enabling a driver of a vehicle to visibly observe objects located in a blind spot includes, but is not limited to, a rear view viewing device that is mounted to the vehicle and configured to be electronically adjustable. The system further includes a sensor that is associated with the vehicle and that is configured to detect a location of an object with respect to the vehicle and to generate a first signal indicative of the location of the object. The system further includes a processor that is communicatively coupled with the sensor and that is operatively coupled with the rear view viewing device. The processor is configured to obtain the first signal from the sensor and to command the rear view viewing device to adjust such that the object is visibly observable to the driver when the processor receives the first signal.Type: GrantFiled: December 16, 2011Date of Patent: August 9, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Dorel M. Sala, Jihan Ryu, Jan H. Aase
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Patent number: 9285485Abstract: A method is provided for estimating vehicle velocity for a vehicle using a single-antenna global positioning system (GPS). An absolute speed and a course angle of the vehicle is measured using the single-antenna GPS. The yaw rates of the vehicle are measured independently of the GPS. An integrated yaw rate of the vehicle is calculated as a function of the measured yaw rates over a period of time. A yaw angle is determined as a function of a reference yaw angle and the integrated yaw rate. Aside slip angle is calculated as a function of the estimated yaw angle and the course angle provided by the GPS. The vehicle velocity is determined as a function of the absolute speed and the side slip angle. The vehicle velocity is provided to a vehicle dynamic control application.Type: GrantFiled: November 12, 2009Date of Patent: March 15, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kevin A. O'Dea, Jihan Ryu, Flavio Nardi, Hualin Tan
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Publication number: 20160009386Abstract: Improved force generator (FG) devices and methods are provided herein. A FG device (10) includes a housing (16, 18), a shaft (S) centrally disposed within the housing, and multiple imbalance rotors (30, 32, 34, 36, 38) disposed within the housing and provided along the shaft. At least two pairs (PA, PB) of imbalance rotors are provided in a nested configuration with respect to each other along the shaft. The at least two pairs (PA, PB) of imbalance rotors are supported in the nested configuration by large and small bearings (BA, BB). Any two imbalance rotors are paired to rotate together in a same direction according to a desired vibration canceling force. A method of controlling vibration within a structure is provided. The method includes detecting vibration, receiving a force command at a FG device, and pairing any two imbalance masses together and rotating a pair of imbalance masses via the rotors together in a same direction to cancel the detected vibration.Type: ApplicationFiled: March 20, 2014Publication date: January 14, 2016Applicant: LORD CORPORATIONInventors: Michael W. TRULL, Michael D. JANOWSKI, Jihan RYU, Reuben SCHUFF, John Mark FREEZE
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Publication number: 20150375857Abstract: Improved active vibration control (AVC) devices (20), systems, and related methods are provided herein. An AVC device (20) includes a controller (24) adapted to receive real-time aircraft information and adjust at least one control parameter as a function of the real-time aircraft information is provided. An AVC device is adapted to detect changes in real-time aircraft information, as the aircraft moves from a steady state to transient performance, low and high air speeds, or vice versa. An AVC system (e.g., AVCS) includes one or more sensors (22), one or more actuators (26), and a controller (24) adapted to receive real-time aircraft information and adjust at least one control parameter. In some aspects, a method of controlling vibration within an aircraft includes receiving vibration information from at least one sensor (22), receiving real-time aircraft information from an avionics system (40), adjusting at least one control parameter used in a control algorithm, and generating a force command.Type: ApplicationFiled: January 17, 2014Publication date: December 31, 2015Inventors: Doug A. SWANSON, Paul R. BLACK, Jihan RYU, Steve C. SOUTHWARD, Doug G. PEDERSEN
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Publication number: 20150346739Abstract: The present subject matter relates to systems and methods for active vibration control system speed monitoring and control in which a speed protection monitor configured to receive index pulses as inputs to monitor the speed of one or more force generators. A rotary actuator control system can be connected in communication with the speed protection monitor and the one or more force generators, wherein the rotary actuator control system is configured to shut down or adjust the speed of the one or more force generators if the one or more force generators are determined to be operating at undesired speeds.Type: ApplicationFiled: January 17, 2014Publication date: December 3, 2015Inventors: Doug A. SWANSON, Paul R. BLACK, David CLARK, Matthew K. FERGUSON, Jihan RYU
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CIRCULAR FORCE GENERATOR DEVICES, SYSTEMS, AND METHODS FOR USE IN AN ACTIVE VIBRATION CONTROL SYSTEM
Publication number: 20150321753Abstract: Improved circular force generator devices (100), systems, and methods for use in an active vibration control system are disclosed. The present subject matter can include improved rotary actuator devices, systems, and methods in which a center shaft (120) is positioned in a fixed relationship with respect to a component housing (114). At least one movable body can be positioned in the component housing and rotatably coupled to the center shaft by a radial bearing (130), the at least one movable body comprising a motor (110) and at least one eccentric mass (150). With this configuration, the motor can be configured to cause rotation of the movable body about the center shaft to produce a rotating force with a controllable rotating force magnitude and a controllable rotating force phase.Type: ApplicationFiled: November 22, 2013Publication date: November 12, 2015Inventors: Paul R. BLACK, Doug A. SWANSON, Askari BADRE-ALAM, Michael D. JANOWSKI, Russell E. ALTIERI, Andrew D. MEYERS, Jihan RYU -
Patent number: 8930079Abstract: A vehicle steering system includes an automatic steering control unit configured to control the vehicle steering system when in an automatic operational state and a driver intervention unit is configured to determine driver intervention during the automatic operational state. The driver intervention unit comprising a decision software module configured to determine driver intervention.Type: GrantFiled: October 22, 2009Date of Patent: January 6, 2015Assignee: GM Global Technology Operations LLCInventors: Yong H. Lee, Jihan Ryu, Weiwen Deng
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Patent number: 8890747Abstract: A system and method is provided for determining a lateral velocity and a longitudinal velocity of a vehicle equipped. The vehicle includes only one antenna for a GPS receiver and a magnetic compass. A magnitude of a velocity vector of the vehicle is determined. A course angle with respect to a fixed reference using the single antenna GPS receiver is determined. A yaw angle of the vehicle is measured with respect to the fixed reference using a magnetic compass. A side slip angle is calculated as a function of the course angle and the yaw angle. The lateral velocity and longitudinal velocity is determined as a function of the magnitude of the velocity vector and the side slip angle.Type: GrantFiled: February 25, 2009Date of Patent: November 18, 2014Assignee: GM Global Technology Operations LLCInventors: Flavio Nardi, Nikolai K. Moshchuk, Jihan Ryu, Kevin A. O'Dea
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Patent number: 8886434Abstract: A method of stabilizing a vehicle is provided. The vehicle is travelling at a forward speed and a lateral speed, and comprises a lateral acceleration sensor, a yaw sensor adapted to detect an actual yaw rate of the vehicle around a central axis, a steering mechanism adapted to steer the vehicle by a steered yaw rate, and an electronic stability control system.Type: GrantFiled: February 4, 2009Date of Patent: November 11, 2014Assignee: GM Global Technology Operations LLCInventors: Kevin A. O'Dea, Flavio Nardi, Jihan Ryu
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Patent number: 8855856Abstract: A system for providing vehicle roll control that controls the friction-force of dampers provided at the wheels of the vehicle. The system includes a lateral acceleration sensor for determining the lateral acceleration of the vehicle, a steering angle sensor for determining the steering angle of the vehicle and a speed sensor for determining the speed of the vehicle. The system calculates a current control signal for one or more of the dampers based on the lateral acceleration and/or the steering angle, and uses one or both of the current control signals to control the friction-force of the inside, outside or both of the dampers.Type: GrantFiled: August 22, 2007Date of Patent: October 7, 2014Assignee: GM Global Technology Operations LLCInventors: Jihan Ryu, Chandra S. Namuduri
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Patent number: 8706347Abstract: A method to monitor alignment of wheels of a vehicle through analysis of a GPS signal includes monitoring the GPS signal, determining an actual trajectory of the vehicle based upon the GPS signal, monitoring a vehicle sensor indicating an expected change in vehicle heading, determining an expected trajectory of the vehicle based upon the vehicle sensor, and indicating misalignment of the wheels of the vehicle based upon a comparison of the trajectories.Type: GrantFiled: January 19, 2010Date of Patent: April 22, 2014Assignee: GM Global Technology Operations LLCInventors: Hong S. Bae, Jihan Ryu
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Patent number: 8509993Abstract: Systems and methods for detecting road bank and determining road bank angle include determining a road bank angle as a function of difference in slip angle where the difference in slip angle is a function of difference in course angle and difference in yaw angle.Type: GrantFiled: April 19, 2010Date of Patent: August 13, 2013Assignee: GM Global Technology Operations, IncInventors: Jihan Ryu, Flavio Nardi, Kevin A. O'Dea, Hualin Tan
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Publication number: 20130155534Abstract: A system for enabling a driver of a vehicle to visibly observe objects located in a blind spot includes, but is not limited to, a rear view viewing device that is mounted to the vehicle and configured to be electronically adjustable. The system further includes a sensor that is associated with the vehicle and that is configured to detect a location of an object with respect to the vehicle and to generate a first signal indicative of the location of the object. The system further includes a processor that is communicatively coupled with the sensor and that is operatively coupled with the rear view viewing device. The processor is configured to obtain the first signal from the sensor and to command the rear view viewing device to adjust such that the object is visibly observable to the driver when the processor receives the first signal.Type: ApplicationFiled: December 16, 2011Publication date: June 20, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: DOREL M. SALA, JIHAN RYU, JAN H. AASE
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Patent number: 8457841Abstract: An analytical methodology for the specification of progressive optimal compression damping of a suspension system to negotiate severe events, yet provides very acceptable ride quality and handling during routine events. In a broad aspect, the method provides a progressive optimal unconstrained damping response of the wheel assembly with respect to the body. In a preferred aspect, the method provides a progressive optimal constrained damping response of the wheel assembly with respect to the body, wherein below a predetermined velocity a conventional damper force is retained.Type: GrantFiled: November 14, 2007Date of Patent: June 4, 2013Assignee: GM Global Technology Operations LLCInventors: Richard J. Knoll, William Golpe, Nikolai K. Moshchuk, Chandra S. Namuduri, Flavio Nardi, Jihan Ryu, Raviraj U. Nayak
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Patent number: 8428819Abstract: An analytical methodology for the specification of progressive optimal compression damping of a damper of a suspension system to negotiate a multiplicity of severe events, yet provides very acceptable ride quality and handling during routine events. The damping response of the damper is optimized based upon a progressive optimal constrained events damping function derived from a low envelope curve incorporated with a predetermined damper force acting on the wheel center below a predetermined wheel center velocity, u1, based on ride and handling considerations for a given vehicle or vehicle model according to the prior art methodology, whereby the low envelope curve is constructed utilizing a one degree of freedom nonlinear mechanical system model or a quarter car nonlinear mechanical system model.Type: GrantFiled: October 23, 2009Date of Patent: April 23, 2013Assignee: GM Global Technology Operations LLCInventors: Nikolai K. Moshchuk, Chandra S. Namuduri, Flavio Nardi, Jihan Ryu, Richard J. Knoll, William Golpe