Patents by Inventor Sun Kyu Lee

Sun Kyu 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: 11745342
    Abstract: An embodiment of the present disclosure provides a manipulator for a finishing work, including: a base; an arm comprising a plurality of links, a plurality of joints connecting the plurality of links, and a plurality of actuators generating rotation of at least some of the plurality of joints; and a processor determining a driving torque of each of the plurality of actuators considering a self-weight effect of the manipulator and controlling the plurality of actuators based on the determined driving torque.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: September 5, 2023
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Sun Kyu Lee, Jong Jae Kim, Sang Ki Park, Dae Gweon Koh, Jae Yun Sim
  • Patent number: 11733685
    Abstract: The present disclosure relates to a surface inspection method using a mold surface inspection device, and more specifically, to a surface inspection method using a mold surface inspection device including a setting part in which an inspection object is set, a light source part configured to irradiate the inspection object with irradiated light so that a reflective highlight is generated on a surface of the inspection object, an imaging part configured to image the surface of the inspection object so that a highlight region where a reflective highlight is generated is included, and an image processing part configured to process an image imaged in the imaging part to provide the image to a worker so that the worker determines whether defects are generated on the surface of the inspection object on the basis of the image.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: August 22, 2023
    Assignee: GIST(Gwangju Institute of Science and Technology)
    Inventors: Sun Kyu Lee, Dae Gweon Koh, Han Ul Kim, Jin Hyuk Hong, Dinuka Ravimal Ranawaka Arachchige
  • Publication number: 20230246551
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Application
    Filed: April 6, 2023
    Publication date: August 3, 2023
    Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
  • Patent number: 11699954
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Grant
    Filed: September 6, 2021
    Date of Patent: July 11, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
  • Patent number: 11637498
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Grant
    Filed: September 6, 2021
    Date of Patent: April 25, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
  • Publication number: 20220226992
    Abstract: An embodiment of the present disclosure provides a manipulator for a finishing work, including: a base; an arm comprising a plurality of links, a plurality of joints connecting the plurality of links, and a plurality of actuators generating rotation of at least some of the plurality of joints; and a processor determining a driving torque of each of the plurality of actuators considering a self-weight effect of the manipulator and controlling the plurality of actuators based on the determined driving torque.
    Type: Application
    Filed: June 3, 2020
    Publication date: July 21, 2022
    Inventors: Sun Kyu Lee, Jong Jae Kim, Sang Ki Park, Dae Gweon Koh, Jae Yun Sim
  • Publication number: 20210399641
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Application
    Filed: September 6, 2021
    Publication date: December 23, 2021
    Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
  • Patent number: 11152860
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: October 19, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sun-Kyu Lee, Nguyen Huyhieu, Dong-Jin Keum, Je-Hyung Yoon, Hee-Seok Han
  • Publication number: 20210247749
    Abstract: The present disclosure relates to a surface inspection method using a mold surface inspection device, and more specifically, to a surface inspection method using a mold surface inspection device including a setting part in which an inspection object is set, a light source part configured to irradiate the inspection object with irradiated light so that a reflective highlight is generated on a surface of the inspection object, an imaging part configured to image the surface of the inspection object so that a highlight region where a reflective highlight is generated is included, and an image processing part configured to process an image imaged in the imaging part to provide the image to a worker so that the worker determines whether defects are generated on the surface of the inspection object on the basis of the image.
    Type: Application
    Filed: September 30, 2020
    Publication date: August 12, 2021
    Applicant: GIST(Gwangju Institute of Science and Technology)
    Inventors: Sun Kyu LEE, Dae Gweon KOH, Han Ul KIM, Jin Hyuk HONG, Dinuka Ravimal Ranawaka Arachchige
  • Patent number: 10714945
    Abstract: A charge control circuit includes: a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: July 14, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae Hwang Kong, Sun Kyu Lee, Sung Yong Lee, Dae Yong Kim, Sang Ho Kim
  • Publication number: 20200119648
    Abstract: A multi-phase switching regulator and a switching regulating method using the multi-phase switching regulator employ an interleaving circuit. The multi-phase switching regulator includes: a first regulating circuit configured to receive an input voltage and generate a first sub-output voltage with a first phase by transforming the input voltage in response to a first set signal; a second regulating circuit configured to receive the input voltage and generate a second sub-output voltage with a second phase by transforming the input voltage in response to a second set signal; and the interleaving circuit configured to repeatedly and sequentially generate the first set signal and the second set signal by comparing a reference voltage with an output voltage generated based on the first sub-output voltage and the second sub-output voltage.
    Type: Application
    Filed: August 14, 2019
    Publication date: April 16, 2020
    Inventors: SUN-KYU LEE, NGUYEN HUYHIEU, DONG-JIN KEUM, JE-HYUNG YOON, HEE-SEOK HAN
  • Publication number: 20190058344
    Abstract: A charge control circuit includes: a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor.
    Type: Application
    Filed: October 23, 2018
    Publication date: February 21, 2019
    Inventors: TAE HWANG KONG, SUN KYU LEE, SUNG YONG LEE, DAE YONG KIM, SANG HO KIM
  • Patent number: 10161597
    Abstract: A lighting system and a selective retro-reflection apparatus are provided. The lighting system includes a lamp, a reflector configured to reflect light emitted by the lamp, a projection lens configured to emit the reflected light of the reflector in a predetermined direction, and a selective shield apparatus disposed between the projection lens and the reflector and provided on a path of light directed upward among the light reflected from the reflector to selectively shield the light directed upward, wherein the selective shield apparatus includes a panel and a selective shield portion supported by the panel, positions of the panel and the selective shield portion are fixed, and a state in which the selective shield portion transmits the light is changed according to whether power is supplied.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: December 25, 2018
    Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sang Ki Park, Sun Kyu Lee, Sung Ki Nam
  • Patent number: 10110032
    Abstract: A charge control circuit includes: a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: October 23, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tae Hwang Kong, Sun Kyu Lee, Sung Yong Lee, Dae Yong Kim, Sang Ho Kim
  • Publication number: 20170040818
    Abstract: A charge control circuit includes: a charge current control circuit configured to receive an input voltage at a first node, output a sensing current to a second node, and turn on a power transistor; a comparator configured to compare a voltage level of the second node with a voltage level of a third node, wherein the third node receives a charging current from the power transistor; a current mirror configured to generate a mirror current corresponding to the sensing current; and an amplifier configured to receive a first feedback voltage based on the mirror current, and amplify a difference between the first feedback voltage and a reference voltage to generate a switch control signal, wherein in response to the switch control signal and a plurality of control signals, the charge current control circuit is configured to decrease the sensing current and turn on the power transistor.
    Type: Application
    Filed: April 12, 2016
    Publication date: February 9, 2017
    Inventors: TAE HWANG KONG, SUN KYU LEE, SUNG YONG LEE, DAE YONG KIM, SANG HO KIM
  • Publication number: 20160053972
    Abstract: A lighting system and a selective retro-reflection apparatus are provided. The lighting system includes a lamp, a reflector configured to reflect light emitted by the lamp, a projection lens configured to emit the reflected light of the reflector in a predetermined direction, and a selective shield apparatus disposed between the projection lens and the reflector and provided on a path of light directed upward among the light reflected from the reflector to selectively shield the light directed upward, wherein the selective shield apparatus includes a panel and a selective shield portion supported by the panel, positions of the panel and the selective shield portion are fixed, and a state in which the selective shield portion transmits the light is changed according to whether power is supplied.
    Type: Application
    Filed: August 14, 2015
    Publication date: February 25, 2016
    Inventors: SANG KI PARK, SUN KYU LEE, SUNG KI NAM
  • Patent number: 9270854
    Abstract: Disclosed is an ultra thin optical scanning device for a portable information device, which includes an LED as a light source and totally reflects light from an object-side surface to form an image, thereby increasing a contrast ratio of the image and improving the resolution thereof. The ultra thin optical scanning device includes a light emitting device that emits light for sensing an object, an object-side surface contacting the object and totally reflecting the light emitted from the light emitting device, an image formation part collecting the light totally reflected by the object-side surface, and transmitting the light, and a light receiver part forming an image by using the light transmitted by the image formation part.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: February 23, 2016
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Sun Kyu Lee, Jae Young Joo, Cha Bum Lee, Do Kyun Woo
  • Patent number: 9151682
    Abstract: A sensor for measuring heat generated from cells, including a thermopile manufactured by surface-micromachining technology, and a microfluidic flow-channel structure for mixing cells with medium and dividing the mixture into cells and medium. Medium and cells are uniformly mixed using a micro-mixer. The mixture is separated into a medium microfluid and a cell microfluid using the Zweifach-Fung effect, after which signals measured in the two microfluids are amplified. The difference between the two signal values determines the amount of heat generated from the cells. The influence of noise caused by a change in external environment is eliminated. Convection heat dissipation caused by fluid flow is minimized. The sensor accurately measures the amount of heat generated from cells flowing in the microfluidic flow-channel. Diseases such as cancer are diagnosed using the difference between the measured amount of heat generated from cells and the standard amount of heat generated from normal cells.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: October 6, 2015
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Sun Kyu Lee, Sung Ki Nam, Su Heon Jeong, Jung Kyun Kim, Do Kyun Woo, Sung Yang
  • Publication number: 20150186722
    Abstract: There are provided an apparatus and a method for eye tracking. The method for eye tracking includes: determining an eyeball area covering a subject's eyeballs; allowing an infrared beam element to emit light during an exposure time of a light-receiving sensor corresponding to the eyeball area; and tracking a subject's gaze based on reflected light emitted by the infrared beam element and reflected by the subject's eyeballs.
    Type: Application
    Filed: July 16, 2014
    Publication date: July 2, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Young Jin Cho, Sun Kyu Lee
  • Publication number: 20150177028
    Abstract: A sensor package may allow a fluid to flow smoothly to thus increase response characteristics. The sensor package may include: a terminal part; at least one electronic element electrically connected to the terminal part through a bonding wire; and a molded part encapsulating the bonding wire and the electronic element and including a sensing portion partially exposing the electronic element and at least one guide portion guiding an ambient fluid to the sensing portion.
    Type: Application
    Filed: June 4, 2014
    Publication date: June 25, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sun Kyu LEE, Tae Kon KOO, Tae Hoon KIM, Kyu Hwan OH, Seog Moon CHOI