Patents by Inventor Se Hwan Choi

Se Hwan 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: 20250170876
    Abstract: A vehicle thermal management system, includes: a refrigerant subsystem including a refrigerant circulation path; a first coolant subsystem including a first coolant circulation path and a PE component fluidly connected to the first coolant circulation path; a second coolant subsystem including a second coolant circulation path and a radiator and a pump fluidly connected to the second coolant circulation path; a heat exchanger including a refrigerant passage fluidly connected to the refrigerant circulation path, a first coolant passage fluidly connected to the first coolant circulation path, and a second coolant passage fluidly connected to the second coolant circulation path; and a controller configured for controlling the pump of the second coolant subsystem based on a temperature of a refrigerant flowing into the refrigerant passage of the heat exchanger and a temperature of a second coolant flowing into the second coolant passage of the heat exchanger.
    Type: Application
    Filed: May 8, 2024
    Publication date: May 29, 2025
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Jae Hyun SONG, Kwang Weon AHN, Tae Han KIM, Je Pil JOUNG, Hwan Yeui HONG, Sang Won LEE, Sung Hyun MOON, Se Hwan CHOI, Jong Moon WON, Seo Jung KIM
  • Publication number: 20250085323
    Abstract: There is provided an antenna beam detection and monitoring apparatus which uses a beam intensity detection sheet with patterned coupling lines. The antenna beam detection apparatus according to an embodiment includes: a sheet which is disposed on an upper end of a beam radiation surface of an antenna and has a plurality of coupling lines formed therein to allow beams radiated from the antenna to be coupled thereto; and a plurality of detectors configured to measure intensities of beams coupled to the coupling lines, respectively, by using the beams radiated from the antenna. Accordingly, it is possible to monitor performance of an antenna in real time with a small-sized device and a low cost even when the antenna is operating.
    Type: Application
    Filed: November 27, 2023
    Publication date: March 13, 2025
    Applicant: Korea Electronics Technology Institute
    Inventors: Seok Yeon HONG, Se Hwan CHOI, Seung Goo NAM
  • Publication number: 20240072451
    Abstract: There is provided an RIS with LC. According to an embodiment, an RIS includes: a plurality of RIS elements; and an RIS controller configured to control the RIS elements to steer an RF signal entering, and the RIS element includes: a first substrate; a second substrate; an antenna disposed between the first substrate and the second substrate; a ground disposed between the first substrate and the second substrate; and an LC phase shifter disposed between the antenna and the ground to change a phase of the RF signal entering. Accordingly, a phase shifter for changing a phase of an RF signal entering is implemented by using LC, so that an RIS may be implemented on a transparent window without obstructing light or a field of vision, and also, an outdoor reflect mode and an indoor transmit mode may be supported by one RIS.
    Type: Application
    Filed: April 17, 2023
    Publication date: February 29, 2024
    Inventors: Seung Goo NAM, Se Hwan CHOI
  • Patent number: 11736183
    Abstract: A repeater is provided. The repeater includes: a hybrid butler matrix configured to perform beamforming of a MIMO antenna for transmitting and receiving a base station signal; a hybrid butler matrix configured to perform beamforming of a MIMO antenna for transmitting and receiving a user terminal signal; and a signal processor configured to amplify a signal to be transmitted and received through the hybrid butler matrix. Accordingly, it is easy to manufacture a repeater, heat emission and power consumption can be reduced, and a cost of production can be reduced.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: August 22, 2023
    Assignee: Korea Electronics Technology Institute
    Inventors: Se Hwan Choi, Kwang Ho Ahn
  • Patent number: 11228091
    Abstract: Disclosed is an electronic device, which includes a housing, a display that is exposed through a first region of a front surface of the housing, a first antenna radiator that is positioned within the housing, and a communication circuit that is positioned within the housing. The display includes a pixel layer including pixels and a conductive sheet layer under the pixel layer. The conductive sheet layer includes a first conductive region, a second conductive region, and a slit interposed between the first conductive region and the second conductive region. The first antenna radiator is electrically connected with the first conductive region of the conductive sheet layer. The communication circuit receives a signal in a specified frequency band through the first antenna radiator and the first conductive region. Above this, various embodiments figured out through the specification are possible.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: January 18, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Do Hun Cha, Jung Sik Park, Se Hwan Choi
  • Publication number: 20210391915
    Abstract: A repeater is provided. The repeater includes: a hybrid butler matrix configured to perform beamforming of a MIMO antenna for transmitting and receiving a base station signal; a hybrid butler matrix configured to perform beamforming of a MIMO antenna for transmitting and receiving a user terminal signal; and a signal processor configured to amplify a signal to be transmitted and received through the hybrid butler matrix. Accordingly, it is easy to manufacture a repeater, heat emission and power consumption can be reduced, and a cost of production can be reduced.
    Type: Application
    Filed: June 3, 2021
    Publication date: December 16, 2021
    Applicant: Korea Electronics Technology Institute
    Inventors: Se Hwan CHOI, Kwang Ho AHN
  • Patent number: 11146953
    Abstract: An electronic device used for unlocking a locking device is disclosed. The electronic device according to various embodiments of the present invention may comprise: a communication module for transmitting an unlock signal; and a processor which performs authentication with respect to a user so as to unlock a locking device, changes, after the user is authenticated, a valid time configured for a first key selected among one or more keys registered on an application, and transmits the unlock signal, including information on the changed valid time and information on the first key, via the communication module. Other various embodiments are also possible.
    Type: Grant
    Filed: July 4, 2017
    Date of Patent: October 12, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-Young Shin, Se-Hwan Choi, Jung-Sik Park
  • Publication number: 20200280198
    Abstract: The present invention relates to an electronic device, and to a method for controlling a connection between an electronic device and a charging device, and a device for providing the same.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 3, 2020
    Inventors: Soon-Youl KWON, Kyoung-Won KIM, Seong-Eun KIM, Jung-Sik PARK, Yu-Min CHO, Se-Hwan CHOI, Kyung-Jung KIM, Hyun-Ju HONG
  • Publication number: 20200235463
    Abstract: Disclosed is an electronic device, which includes a housing, a display that is exposed through a first region of a front surface of the housing, a first antenna radiator that is positioned within the housing, and a communication circuit that is positioned within the housing. The display includes a pixel layer including pixels and a conductive sheet layer under the pixel layer. The conductive sheet layer includes a first conductive region, a second conductive region, and a slit interposed between the first conductive region and the second conductive region. The first antenna radiator is electrically connected with the first conductive region of the conductive sheet layer. The communication circuit receives a signal in a specified frequency band through the first antenna radiator and the first conductive region. Above this, various embodiments figured out through the specification are possible.
    Type: Application
    Filed: August 30, 2018
    Publication date: July 23, 2020
    Inventors: Do Hun CHA, Jung Sik PARK, Se Hwan CHOI
  • Publication number: 20190239070
    Abstract: An electronic device used for unlocking a locking device is disclosed. The electronic device according to various embodiments of the present invention may comprise: a communication module for transmitting an unlock signal; and a processor which performs authentication with respect to a user so as to unlock a locking device, changes, after the user is authenticated, a valid time configured for a first key selected among one or more keys registered on an application, and transmits the unlock signal, including information on the changed valid time and information on the first key, via the communication module. Other various embodiments are also possible.
    Type: Application
    Filed: July 4, 2017
    Publication date: August 1, 2019
    Inventors: Jae-Young SHIN, Se-Hwan CHOI, Jung-Sik PARK
  • Patent number: 10122091
    Abstract: A microstrip patch antenna includes a via-hole pad including via-holes, a patch disposed on the via-hole pad, a feeding via-hole disposed at a side of the patch through the patch and the via-hole pad, and a shorting via-hole disposed at a side of the patch, and configured to connect the patch and a ground unit.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: November 6, 2018
    Assignees: Samsung Electronics Co., Ltd., Korea Electronics Technology Institute
    Inventors: Jae Sup Lee, Ho Jun Lee, Se Hwan Choi
  • Publication number: 20170344333
    Abstract: An electronic device includes a memory configured to store an application including a plurality of resources, each of the resources is matched to each of a plurality of characteristic information which include a first characteristic information of the electronic device and a second characteristic information of an external electronic device. A communication interface communicates with the external electronic device and a processor is operatively connected with the memory and the communication interface. The processor receives the second characteristic information of the external electronic device connected via the communication interface, selects at least one of the resources included in the application based on the second characteristic information of the external electronic device, generates a screen where the application is executed, using the at least one of the resources, and transmits data corresponding to the screen to the external electronic device.
    Type: Application
    Filed: May 24, 2017
    Publication date: November 30, 2017
    Inventors: Hong Ik Jin, Yong Soo Kwon, Young Kyu Seon, Yoo Jin Lee, Yu Min Cho, Se Hwan Choi, Kyung Jung Kim, Ga Jin Song
  • Publication number: 20170310367
    Abstract: An electronic device of the present disclosure is provided. The electronic device includes a housing having a first plate facing a first direction, a second plate facing a second direction, and at least one side part, between the first plate and the second plate, facing a third direction, a first conductive pattern comprising a first coil having a first axis substantially extending in the first direction or the second direction, a second conductive pattern comprising a second coil having a second axis substantially extending in the third direction, and a communication circuit connected with the first conductive pattern and the second conductive pattern.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Se Hwan CHOI, Jung Sik PARK, Woo Sup LEE, Geon Woo KIM
  • Patent number: 9466880
    Abstract: A patch antenna having a single patch fed with multiple signals is provided. The patch antenna includes: a first patch; a first feeder and a second feeder which are connected to the first patch; and a second patch which is parallel to the first patch. Accordingly, since multiple signals can be fed into a single patch, a MIMO antenna can be embodied by using a patch antenna which has high isolation between feeders without increasing its size.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: October 11, 2016
    Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
    Inventors: Se Hwan Choi, Jae Young Lee
  • Publication number: 20150138035
    Abstract: A microstrip patch antenna includes a via-hole pad including via-holes, a patch disposed on the via-hole pad, a feeding via-hole disposed at a side of the patch through the patch and the via-hole pad, and a shorting via-hole disposed at a side of the patch, and configured to connect the patch and a ground unit.
    Type: Application
    Filed: February 10, 2014
    Publication date: May 21, 2015
    Applicants: Korea Electronics Technology Institute, Samsung Electronics Co., Ltd.
    Inventors: Jae Sup LEE, Ho Jun LEE, Se Hwan CHOI
  • Patent number: 7061743
    Abstract: The present invention relates to a multi-pulse HVDC system which is capable of minimizing the number of thyristors by providing a thyristor auxiliary circuit in a conventional 12-pulse thyristor HVDC(High Voltage Direct Current), not using an additional stack of a thyristor and which is implemented based on an auxiliary circuit having a multi-pulse thyristor HVDC system like 24-pulse/36-pulse/48-pulse converters. The multi-pulse HVDC system is characterized in that an upper side thyristor converter 12 and a lower side thyristor converter 13 are installed in a ?-?-Y transformer 11, and two current smoothing reactor 39 and a direct voltage dividing condenser 38 are installed between the upper side thyristor converter 12 and the lower side thyristor converter 13, and two thyristors 32, 33: T2 and T1 are connected to one double winding transformer 31.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: June 13, 2006
    Assignee: Korea Electric Power Corporation
    Inventors: Chan Ki Kim, Gil Jo Jung, Bong Eon Kho, Yong Ho An, Se Hwan Choi, Jong Ki Choi, Byeong Mo Yang
  • Publication number: 20040085703
    Abstract: The present invention relates to a multi-pulse HVDC system which is capable of minimizing the number of thyristors by providing a thyristor auxiliary circuit in a conventional 12-pulse thyristor HVDC(High Voltage Direct Current), not using an additional stack of a thyristor and which is implemented based on an auxiliary circuit having a multi-pulse thyristor HVDC system like 24-pulse/36-pulse/48-pulse converters. The multi-pulse HVDC system is characterized in that an upper side thyristor converter 12 and a lower side thyristor converter 13 are installed in a &Dgr;-&Dgr;-Y transformer 11, and two current smoothing reactor 39 and a direct voltage dividing condenser 38 are installed between the upper side thyristor converter 12 and the lower side thyristor converter 13, and two thyristors 32, 33: T2 and T1 are connected to one double winding transformer 31.
    Type: Application
    Filed: January 15, 2003
    Publication date: May 6, 2004
    Inventors: Chan Ki Kim, Gil Jo Jung, Bong Eon Kho, Yong Ho An, Se Hwan Choi, Jong Ki Choi, Byeong Mo Yang