Patents by Inventor Kwang Chan LEE

Kwang Chan LEE 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).

  • Patent number: 10430701
    Abstract: A magnetic secure transmission (MST) system includes a switching circuit, an inductor, and a control circuit. The control circuit is configured to control the switching circuit to adjust a level of current in the inductor. The inductor current may be adjusted by a first amount over a data transmission period such that the inductor emits a magnetic pulse including a first magnitude. The inductor current may be kept constant during a first sub-period of a data non-transmission period and may be changed by a second amount at a constant slope during a second sub-period of the data non-transmission period, such that the inductor emits a magnetic pulse including a second magnitude during the second sub-period of the data non-transmission period. The second amount is less than the first amount. The first magnitude is greater than a threshold value. The second magnitude is less than the threshold value.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: October 1, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Woo Lee, Hyoung-Seok Oh, Sang-Hee Kang, Kwang-Chan Lee, Dae-Woong Cho, Jung-Wook Heo
  • Patent number: 10405446
    Abstract: An electronic device including a waterproof structure is provided. The electronic device includes a housing that includes a first face, a second face that faces in a direction substantially opposite to the first face, and a side surface that at least partially encloses a space between the first face and the second face, a middle plate arranged between the first face and the second face inside the housing to be substantially parallel to the first face, extending from the side surface, and including at least one opening, a printed circuit board arranged between the middle plate and the second face, a display arranged between the middle plate and the first face, and including a face directed toward the second face, and a seal member configured to hermetically seal the at least one opening of the middle plate, and arranged between the face of the display and the middle plate.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 3, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Min Choi, Woong-Chan Kim, Daehyeong Park, Sung-Gun Cho, Sung-Joo Cho, Young-Sik Choi, Kwang-Hwan Kim, Soonwoong Yang, Min-Sung Lee, Seungjoon Lee, Yuchul Chang
  • Publication number: 20190259718
    Abstract: A semiconductor device includes a conductive component on a substrate, a passivation layer on the substrate and including an opening that exposes at least a portion of the conductive component, and a pad structure in the opening and located on the passivation layer, the pad structure being electrically connected to the conductive component. The pad structure includes a lower conductive layer conformally extending on an inner sidewall of the opening, the lower conductive layer including a conductive barrier layer, a first seed layer, an etch stop layer, and a second seed layer that are sequentially stacked, a first pad layer on the lower conductive layer and at least partially filling the opening, and a second pad layer on the first pad layer and being in contact with a peripheral portion of the lower conductive layer located on the top surface of the passivation layer.
    Type: Application
    Filed: April 30, 2019
    Publication date: August 22, 2019
    Inventors: Ju-il Choi, Kwang-jin Moon, Ju-bin Seo, Dong-chan Lim, Atsushi Fujisaki, Ho-jin Lee
  • Publication number: 20190256882
    Abstract: The present invention relates to a process of converting carbon dioxide using a combination of a carbon dioxide mineralization and the metabolism of sulfur-oxidizing microorganisms. According to the process, a carbonate produced in the carbon dioxide mineralization reaction can be converted to a useful substance without supplying an external additional energy source (light, electrical energy, etc.) and mineral resources (metal ions). In addition, the process can be continuously performed by recycling metal ions necessary for the carbon dioxide mineralization reaction.
    Type: Application
    Filed: September 26, 2017
    Publication date: August 22, 2019
    Inventors: Woo Chan Park, Kwang Kuk Cho, Taewan Kim, Yeon Hwa La, Jayoung Ryu, Sang Min Lee
  • Patent number: 10382665
    Abstract: An electronic device is provided. The electronic device includes a first camera module including a first lens set, a second camera module including a second lens set, and a processor connected to the first camera module and a second camera module. The processor is configured to move the first lens focus on a subject, resulting in an auto focus (AF) value and an image obtained by the first camera module, evaluate reliability of the AF value, based on the reliability of the AF value, calculate a movement parameter of the second lens set, corresponding to a movement parameter of the first lens set, and move the second lens set depending on the calculated movement parameter.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: August 13, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok Woon Sa, Byeong Chan Park, In Koo Kang, Seung Han Lee, Kwang Tai Kim, Dong Hyun Yeom, Jong Hoon Won, Ki Huk Lee
  • Patent number: 10361620
    Abstract: The voltage converter including an inductor connected between an output node and a switch node, a capacitor connected between the output node and a ground node, first transistor connected between the switch node and the ground node, a second transistor connected between the switch node and an input node, a boost capacitor connected between the switch node and a boost node, a first driver configured to drive a gate voltage of the first transistor based on a ground voltage of the ground node and a power supply voltage of a power node, a second driver configured to drive a gate voltage of the second transistor based on a switch voltage of the switch node and a boost voltage of the boost node and, and a regulator configured to control the boost voltage depending on a status of the voltage converter may be provided.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: July 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Chan Lee, Sungwoo Lee, Jungwook Heo, Hyoungseok Oh, Jiheon Kang, Hocheol Chung
  • Patent number: 10355684
    Abstract: A calculation code generation circuit performs calibration using a counter, and a digital correction circuit including the same. The calculation code generation circuit performs a calculation process according to first and second modes, the calculation process including generating a first code by sampling a first value of the count code, generating a second code by sampling a second value of the count code, generating first and second calculation codes using the first and second codes in the first and second modes, respectively, and generating, in a calibration disable state, a third calculation code using the first and second calculation codes generated in the first and second modes, respectively, to remove the influence of the comparison offset or comparison performance of a comparator, thereby removing a calibration error.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: July 16, 2019
    Assignees: SK HYNIX INC, KUMOH NATIONAL INSTITUTE OF TECHNOLOGY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Young Chan Jang, Pil Ho Lee, Kwang Hun Lee, Hyun Bae Lee
  • Patent number: 10345223
    Abstract: Disclosed is an optical gas sensor. The optical gas sensor includes: a light source which emits light; a gas collector which includes a cavity to be filled with gas to be sensed; an optical wave guider which guides light emitted from the light source to be output to the cavity, and guides the output light to be output again to the cavity after passing through the cavity of the gas collector; and an optical detector which detects light output from the optical wave guider. Thus, a path of light exposed to the gas to be sensed is increased within the cavity, thereby achieving miniaturization and sensing gas of low-concentration.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: July 9, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-suk Kwak, Kwang-bok Kim, Dae-kwang Jung, Yong-won Jeong, Jun-ho Koh, Chang-hyun Kim, Yong-chan Lee, Jeong-eun Lee
  • Patent number: 10325869
    Abstract: A semiconductor device includes a conductive component on a substrate, a passivation layer on the substrate and including an opening that exposes at least a portion of the conductive component, and a pad structure in the opening and located on the passivation layer, the pad structure being electrically connected to the conductive component.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: June 18, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ju-il Choi, Kwang-jin Moon, Ju-bin Seo, Dong-chan Lim, Atsushi Fujisaki, Ho-jin Lee
  • Publication number: 20190169416
    Abstract: Disclosed are polyimide blends and methods of making and using same. The disclosed polyimide blends are prepared by first blending an ionic polymer and a poly(amic acid) to form a poly(amic acid) precursor, followed by cyclization. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
    Type: Application
    Filed: July 31, 2017
    Publication date: June 6, 2019
    Applicant: The Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The University of Ne
    Inventors: Kwang Jin KIM, Dong-Chan LEE, Jungsoo NAM, Tae Seon HWANG
  • Patent number: 10301327
    Abstract: A method for preparing an anionic polymerization initiator, a device for manufacturing the same, and an anionic polymerization initiator prepared therefrom is provided. And the method for preparing an anionic polymerization initiator according to the present invention is characterized in that in a continuous reactor an amine compound of Formula 1 and/or Formula 2; an organometallic compound; and/or a conjugated diene compound are introduced in the form of a solution and reacted.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: May 28, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Jae Hoon Choe, Dong Cheol Choe, Hyun Ju Kim, Hyeon Hui Kim, Jong Young Choi, Jung Yong Lee, Woong Chan Jeong, Jong Min Shin, Chan Joong Kim, Kwang Ho Song
  • Patent number: 10270339
    Abstract: A charger integrated circuit is provided which includes a DC-DC converter configured to receive an input voltage and generate an output voltage through a switching operation for charging a battery, and a charging controller configured to control the switching operation such that the output voltage is supplied to the battery through charging paths chargeable according to a level of the input voltage.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: April 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Chan Lee, Sanghee Kang, Jungwook Heo, Sungwoo Lee, Daewoong Cho
  • Publication number: 20190081549
    Abstract: The voltage converter including an inductor connected between an output node and a switch node, a capacitor connected between the output node and a ground node, first transistor connected between the switch node and the ground node, a second transistor connected between the switch node and an input node, a boost capacitor connected between the switch node and a boost node, a first driver configured to drive a gate voltage of the first transistor based on a ground voltage of the ground node and a power supply voltage of a power node, a second driver configured to drive a gate voltage of the second transistor based on a switch voltage of the switch node and a boost voltage of the boost node and, and a regulator configured to control the boost voltage depending on a status of the voltage converter may be provided.
    Type: Application
    Filed: May 1, 2018
    Publication date: March 14, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kwang Chan LEE, Sungwoo Lee, Jungwook Heo, Hyoungseok Oh, Jiheon Kang, Hocheol Chung
  • Publication number: 20180301911
    Abstract: The semiconductor device including first and second transistors configured to provide a first voltage to a first node, the first voltage being a voltage provided from a travel adaptor (TA), a third transistor connected in series with the second transistor and configured to provide a ground voltage to the first node, and a fourth transistor configured to receive a second voltage from a first inductor connected to the first node, and provide the second voltage to a second node as a third voltage for charging a battery connected thereto may be provided.
    Type: Application
    Filed: January 11, 2018
    Publication date: October 18, 2018
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung Kyu CHO, Hyoung seok OH, Kwang Chan LEE, Dae Woong CHO, Jung Wook HEO
  • Publication number: 20180123373
    Abstract: A semiconductor integrated circuit may include a recharge switch and a Wireless Recharge/MST unit. The recharge switch is connected with a battery through an intermediate node and provides a current path for wirely charging the battery in a wired charging mode. The Wireless Recharge/MST unit is connected between the intermediate node and a ground. The Wireless Recharge/MST unit disconnects the intermediate node and the ground in the wired charging mode, provides a wireless charging current to the battery through the intermediate node in a wireless charging mode, and is supplied with a current for generating a magnetic signal from the battery through the intermediate node in a magnetic secure transmission (MST) mode.
    Type: Application
    Filed: May 25, 2017
    Publication date: May 3, 2018
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sungwoo LEE, Hyoungseok OH, Kwang Chan LEE
  • Patent number: 9899918
    Abstract: In a DC/DC converter, a driving method thereof, and a power supply using the same, the DC/DC converter includes a plurality of power switches connected as a serial string between an input terminal and a ground terminal, a first capacitor connected to at least two power switches of the serial string in parallel, an inductor connected between an intermediate node of the serial string and an output terminal, a second capacitor connected between the output terminal and the ground terminal, and a plurality of drivers configured to generate a switching control signal for each of the plurality of power switches. A voltage having no correlation with a voltage of the input terminal is supplied to a power terminal of each of the plurality of drivers.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: February 20, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-chan Lee, Sung-woo Lee, Sang-hee Kang, Jung-wook Heo
  • Publication number: 20180032850
    Abstract: A magnetic secure transmission (MST) system includes a switching circuit, an inductor, and a control circuit. The control circuit is configured to control the switching circuit to adjust a level of current in the inductor. The inductor current may be adjusted by a first amount over a data transmission period such that the inductor emits a magnetic pulse including a first magnitude. The inductor current may be kept constant during a first sub-period of a data non-transmission period and may be changed by a second amount at a constant slope during a second sub-period of the data non-transmission period, such that the inductor emits a magnetic pulse including a second magnitude during the second sub-period of the data non-transmission period. The second amount is less than the first amount. The first magnitude is greater than a threshold value. The second magnitude is less than the threshold value.
    Type: Application
    Filed: February 7, 2017
    Publication date: February 1, 2018
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-Woo LEE, Hyoung-Seok OH, Sang-Hee KANG, Kwang-Chan LEE, Dae-Woong CHO, Jung-Wook HEO
  • Publication number: 20160315539
    Abstract: In a DC/DC converter, a driving method thereof, and a power supply using the same, the DC/DC converter includes a plurality of power switches connected as a serial string between an input terminal and a ground terminal, a first capacitor connected to at least two power switches of the serial string in parallel, an inductor connected between an intermediate node of the serial string and an output terminal, a second capacitor connected between the output terminal and the ground terminal, and a plurality of drivers configured to generate a switching control signal for each of the plurality of power switches. A voltage having no correlation with a voltage of the input terminal is supplied to a power terminal of each of the plurality of drivers.
    Type: Application
    Filed: January 22, 2016
    Publication date: October 27, 2016
    Inventors: Kwang-chan Lee, Sung-woo Lee, Sang-hee Kang, Jung-wook Heo
  • Publication number: 20160254689
    Abstract: A charger integrated circuit is provided which includes a DC-DC converter configured to receive an input voltage and generate an output voltage through a switching operation for charging a battery, and a charging controller configured to control the switching operation such that the output voltage is supplied to the battery through charging paths chargeable according to a level of the input voltage.
    Type: Application
    Filed: December 9, 2015
    Publication date: September 1, 2016
    Inventors: Kwang Chan LEE, Sanghee KANG, Jungwook HEO, Sungwoo LEE, Daewoong CHO