Patents by Inventor Chul-Woo Kim
Chul-Woo Kim 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: 20200132765Abstract: A test apparatus may include transceivers and a global de-skew circuit. In a training mode, the transceivers provide first timing information obtained by delaying a first data signal in the range of up to a preset unit interval based on a clock signal and receive second timing information corresponding to timing differences between a slowest transceiver and the remaining transceivers. In an operation mode, the transceivers provide compensation data to a plurality of DUTs (Devices Under Test) substantially simultaneously. The compensation data may be obtained by delaying a second data signal by multiples of the preset unit interval in response to the second timing information. In the training mode, the global de-skew circuit receives the first timing information, calculates, using the first timing information, the timing differences between the slowest transceiver and the remaining transceivers , and provides the second timing information corresponding to the timing differences to the transceivers.Type: ApplicationFiled: January 2, 2020Publication date: April 30, 2020Inventors: Chul Woo KIM, Dong Yoon KIM, In Hwa JUNG, Yong Ju KIM
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Publication number: 20200052796Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.Type: ApplicationFiled: March 22, 2019Publication date: February 13, 2020Inventors: Chul Woo KIM, Hyun Su PARK, Jin Cheol SIM, Choong Hwan LEE
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Patent number: 10557888Abstract: A test apparatus may include transceivers and a global de-skew circuit. In a training mode, the transceivers provide first timing information obtained by delaying a first data signal in the range of up to a preset unit interval based on a clock signal and receive second timing information corresponding to timing differences between a slowest transceiver and the remaining transceivers. In an operation mode, the transceivers provide compensation data to a plurality of DUTs (Devices Under Test) substantially simultaneously. The compensation data may be obtained by delaying a second data signal by multiples of the preset unit interval in response to the second timing information. In the training mode, the global de-skew circuit receives the first timing information, calculates, using the first timing information, the timing differences between the slowest transceiver and the remaining transceivers, and provides the second timing information corresponding to the timing differences to the transceivers.Type: GrantFiled: July 14, 2017Date of Patent: February 11, 2020Assignee: SK HYNIX INC.Inventors: Chul Woo Kim, Dong Yoon Kim, In Hwa Jung, Yong Ju Kim
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Publication number: 20200007240Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: September 9, 2019Publication date: January 2, 2020Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Publication number: 20200007239Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: September 9, 2019Publication date: January 2, 2020Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Patent number: 10509560Abstract: An electronic device having a flexible display and a method for operating the same are provided. The method includes displaying a first graphic user interface (GUI) for character input on a flexible display and detecting a change in a bending state of the flexible display. Changing the first GUI to a second GUI based on the detected change of the bending state of the flexible display, and then displaying the second GUI. In some embodiments, the method may include determining a moved area among the first area and the second area and displaying the second GUI based on the determined moved area and the angle between the first area and the second area. Determining the moved area may include detecting a first pressure corresponding to the first area and a second pressure corresponding to the second area, and then determining the moved area based on the first and second pressures.Type: GrantFiled: December 19, 2016Date of Patent: December 17, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-Woo Kim, Sung-Youn An, Hang-Kyu Park
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Publication number: 20190332659Abstract: Provided are a portable device and a method for controlling a cursor of the portable device. More specifically, disclosed are a portable device and a method for controlling a cursor of the portable device, by which a cursor that is displayed by using a first pressure touch (or successive motions of the first pressure touch) is controlled. Some of the disclosed embodiments provide a portable device and a method for controlling a cursor of the portable device, by which a cursor that is displayed by using a first touch and a first pressure touch (or successive motions of the first pressure touch) is controlled.Type: ApplicationFiled: June 14, 2017Publication date: October 31, 2019Inventors: Seul-Ae YANG, Ji-Won BAEK, Chul-Woo KIM, Min-Jung MOON, Ha-Young JEON, Won-Heui JUNG
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Publication number: 20190318266Abstract: A computing device of the present invention estimates an unknown parameter ? of a model formula when distributed sample data is acquired, wherein when an estimated quantity of ? is acquired, a function g is estimated using a random forest model, such that when an estimated quantity of g is acquired, the estimated quantity of g and the estimated quantity of ? are used so as estimate a function G as a prediction formula for new data corresponding to a specific item such that an estimated quantity of G is acquired, and thus new data xnew is received, thereby enabling the class of the specific item to be classified from the calculated value.Type: ApplicationFiled: November 9, 2017Publication date: October 17, 2019Inventors: Chul Woo KIM, Yong Dai KIM, Kyung Nam KANG, Oh Ran KWON
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Patent number: 10447402Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: GrantFiled: October 30, 2017Date of Patent: October 15, 2019Assignees: SK HYNIX INC., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Chul Woo Kim, Sang Geun Bae, Hyun Su Park, Choong Hwan Lee
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Patent number: 10403241Abstract: An electronic device is provided. The electronic device includes a display positioned on at least a surface of a housing of the electronic device, at least one sensor configured to sense a bend of the display and a mount of the electronic device, and a processor configured to control a running of an application, obtain information relating to a shape of the bend of the display and a form of the mount of the electronic device based on information sensed by the at least one sensor, determine a transformation type of the display based on the information relating to the shape of the bend and the form of the mount, when the electronic device is mounted in the determined transformation type, determine at least one display area in the display according to a first function of the application corresponding to the transformation type, and perform control to display an object relating to the first function on the determined display area.Type: GrantFiled: January 25, 2017Date of Patent: September 3, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Hee-Jin Kim, Kyu-Ok Choi, Dong-Jun Shin, Chul-Woo Kim
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Patent number: 10320593Abstract: A receiver for data communication may include: an input buffer suitable for generating plural comparison signals by differentially comparing plural input signals; a de-serializer suitable for generating plural groups of de-serialized signals by de-serializing the plural comparison signals at a preset de-serialization ratio; a D flip-flop suitable for generating plural delayed signals by delaying last de-serialized signals of the respective plural groups of de-serialized signals by a preset time; a symbol decoder suitable for comparing current and previous states of the plural comparison signals and for generating plural symbol signals based on a preset state diagram defining a correspondence relationship between the plural symbol signals and changes between current and previous states of the plural comparison signals.Type: GrantFiled: April 7, 2017Date of Patent: June 11, 2019Assignees: SK hynix Inc., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Chul Woo Kim, Sung Jun Moon, Sang Su Lee
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Publication number: 20190072590Abstract: Provided is a power detection circuit for tracking a maximum power point of a solar cell. The power detection circuit includes: an average voltage extracting unit which extracts an average voltage VPV,LPF from an external voltage VPV input from an external energy source; a ripple voltage extracting unit which extracts a ripple voltage including current information of the external voltage VPV from the external voltage VPV; a voltage-time converter which generates a ramp voltage VRAMP changing at a predetermined rate and converts the average voltage VPV,LPF and the ripple voltage into corresponding time information ?t1 and ?t2 based on the ramp voltage VRAMP; a time-digital converter which converts the time information ?t2 for the ripple voltage into a digital code t2 [n:0]; and a time multiplier which multiplies the digital code t2 [n:0] and the time information ?t1 for the average voltage VPV,LPF to output a specific voltage value.Type: ApplicationFiled: January 25, 2018Publication date: March 7, 2019Applicant: Korea University Research and Business FoundationInventors: Chul Woo Kim, Jun Young Maeng, Min Seob Shim, Jun Won Jeong
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Publication number: 20180294883Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: October 30, 2017Publication date: October 11, 2018Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Patent number: 10004252Abstract: Provided is a kelp chip manufacturing method which does not require frying with no transformation of the shape of kelp but has high preference. The kelp chip manufacturing method includes: a kelp braizing process of braizing kelp using one of starch syrup, soy source, olive oil or mixture of starch syrup, soy source and olive oil; a kelp heating process of heating the braized kelp in a retort-pouched state; and a kelp freeze-drying process of freeze-drying the heated kelp. The kelp chip manufacturing method can manufacture kelp chips with high preference in texture, taste and so on through the kelp braizing process and the kelp heating process.Type: GrantFiled: October 26, 2015Date of Patent: June 26, 2018Assignee: HYANG-A FOOD CO., LTD.Inventor: Chul-Woo Kim
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Publication number: 20180159552Abstract: A receiver for data communication may include: an input buffer suitable for generating plural comparison signals by differentially comparing plural input signals; a de-serializer suitable for generating plural groups of de-serialized signals by de-serializing the plural comparison signals at a preset de-serialization ratio; a D flip-flop suitable for generating plural delayed signals by delaying last de-serialized signals of the respective plural groups of de-serialized signals by a preset time; a symbol decoder suitable for comparing current and previous states of the plural comparison signals and for generating plural symbol signals based on a preset state diagram defining a correspondence relationship between the plural symbol signals and changes between current and previous states of the plural comparison signals.Type: ApplicationFiled: April 7, 2017Publication date: June 7, 2018Inventors: Chul Woo KIM, Sung Jun MOON, Sang Su LEE
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Publication number: 20180156870Abstract: A test apparatus may include transceivers and a global de-skew circuit. In a training mode, the transceivers provide first timing information obtained by delaying a first data signal in the range of up to a preset unit interval based on a clock signal and receive second timing information corresponding to timing differences between a slowest transceiver and the remaining transceivers. In an operation mode, the transceivers provide compensation data to a plurality of DUTs (Devices Under Test) substantially simultaneously. The compensation data may be obtained by delaying a second data signal by multiples of the preset unit interval in response to the second timing information. In the training mode, the global de-skew circuit receives the first timing information, calculates, using the first timing information, the timing differences between the slowest transceiver and the remaining transceivers, and provides the second timing information corresponding to the timing differences to the transceivers.Type: ApplicationFiled: July 14, 2017Publication date: June 7, 2018Inventors: Chul Woo KIM, Dong Yoon KIM, In Hwa JUNG, Yong Ju KIM
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Publication number: 20180067118Abstract: A method for diagnosing lung cancer in a subject by using a complex biomarker group is provided. The method includes steps of: (a) a computing system (1) acquiring a model M by using expression level data by individual biomarkers in the complex biomarker group and then (2) acquiring expression level data by the individual biomarkers measured from a biological specimen of the subject or their processed data Bk; and (b) the computing system determining whether lung cancer is detected in the subject by using the acquired data of the subject by referring to the model M; wherein the complex biomarker group includes CEA, HE4, ApoA2, TTR, sVCAM-1 and RANTES.Type: ApplicationFiled: February 10, 2017Publication date: March 8, 2018Inventors: Chul Woo Kim, Yong Dai Kim, Yong Sung Shin, Eun Hee Yeon, Kyung Nam Kang, Ho Sang Shin, Oh Ran Kwon
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Publication number: 20170346619Abstract: The present solution provides a signal processing device, including: an encoder which encodes second transmitting data by referring to first transmitting data which is previously transmitted and the second transmitting data which is a current transmitting target such that at least one bit signal of the second transmitting data has a binary level different from that of a corresponding bit signal of the first transmitting data; and a transmitter which sequentially transmits the first transmitting data and the second transmitting data.Type: ApplicationFiled: October 17, 2016Publication date: November 30, 2017Applicant: Korea University Research and Business FoundationInventors: Chul Woo Kim, Yeon Ho Lee, Yoon Jae Choi
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Patent number: 9832010Abstract: The present solution provides a signal processing device, including: an encoder which encodes second transmitting data by referring to first transmitting data which is previously transmitted and the second transmitting data which is a current transmitting target such that at least one bit signal of the second transmitting data has a binary level different from that of a corresponding bit signal of the first transmitting data; and a transmitter which sequentially transmits the first transmitting data and the second transmitting data.Type: GrantFiled: October 17, 2016Date of Patent: November 28, 2017Assignee: Korea University Research and Business FoundationInventors: Chul Woo Kim, Yeon Ho Lee, Yoon Jae Choi
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Patent number: 9793751Abstract: Disclosed is an energy harvesting apparatus. The energy harvesting apparatus includes a rectifier for rectifying an alternating current (AC) voltage supplied from an energy source into a direct current (DC) voltage, a charging unit for storing an output voltage of the rectifier, and a maximum power point tracker selectively connected between the rectifier and the charging unit, for differentiating the output voltage of the rectifier in a first connection state, and for controlling the output voltage of the rectifier based on a differentiation result.Type: GrantFiled: January 7, 2015Date of Patent: October 17, 2017Assignee: Korea University Research and Business FoundationInventors: Chul Woo Kim, Min Seob Shim, Jun Won Jung, Jung Moon Kim