Patents by Inventor Sung Joo Chang

Sung Joo Chang 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: 10768049
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for forming a terahertz Bessel beam at an inspection target object using a terahertz wave incident from the terahertz wave generating unit; a first lens for changing an angle of the terahertz wave radiated, when the terahertz Bessel beam is transmitted through the inspection target object, to be smaller; a second lens for concentrating the terahertz wave passing through the first lens and toward a detection unit; and a terahertz wave detection unit for detecting the terahertz wave concentrated by the second lens.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: September 8, 2020
    Assignee: KOREA RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Publication number: 20200240844
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Application
    Filed: February 25, 2020
    Publication date: July 30, 2020
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Publication number: 20200191656
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for forming a terahertz Bessel beam at an inspection target object using a terahertz wave incident from the terahertz wave generating unit; a first lens for changing an angle of the terahertz wave radiated, when the terahertz Bessel beam is transmitted through the inspection target object, to be smaller; a second lens for concentrating the terahertz wave passing through the first lens and toward a detection unit; and a terahertz wave detection unit for detecting the terahertz wave concentrated by the second lens.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Publication number: 20200170023
    Abstract: A device-to-device (D2D) communication method, performed by a receiving D2D terminal, may comprise receiving D2D data from a transmitting D2D terminal; generating feedback information for the D2D data; and receiving information on a first resource for transmission of the feedback information from a base station, and transmitting the feedback information to the transmitting D2D terminal through the first resource, wherein the information on the first resource is received without an explicit scheduling request (SR) to the base station.
    Type: Application
    Filed: August 30, 2019
    Publication date: May 28, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Yun Joo KIM, Yu Ro LEE, EunKyung KIM, Tae Joong KIM, Hyun Seo PARK, An Seok LEE, Sung Cheol CHANG
  • Patent number: 10648864
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: May 12, 2020
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Patent number: 10460628
    Abstract: A tile map service (TMS) device and method are provided. The TMS device includes a storage configured to store map layers that have different map types, map data of an image tile form having a level of detail (LOD) structure of each of the map layers, and a tile map in which image tile maps of a plurality of map layers are merged; a communicator configured to receive map request information including two or more map types, an LOD level, and arbitrary map coordinates from a client; and a provider configured to provide a tile map corresponding to the map request information to the client.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: October 29, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yoon Seop Chang, In Sung Jang, Jae Min Seol, In Hak Joo, Won Geun Choi
  • Publication number: 20190250037
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Application
    Filed: November 23, 2016
    Publication date: August 15, 2019
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Patent number: 10299148
    Abstract: A device and a method for providing a wireless LAN service in an electronic device are provided. The electronic device includes a communication interface that transmits and receives a signal for a wireless LAN service; and a processor that selects a plurality of channels using the communication interface and based on channel scan information, accesses at least one Access Point (AP) corresponding to at least one channel among the plurality of channels, and monitors the plurality of channels in a state in which the access to at least one AP is maintained.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: May 21, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Duk-Hyun Chang, Sung-Rae Cho, Hyoung-Joo Lee, Chae-Man Lim, Jung-Woo Lee
  • Patent number: 7267735
    Abstract: Disclosed is a prefab waterproof structure and method for fabricating the waterproof structure according to a dry process. The prefab waterproof structure comprises a base sheet layer including a plurality of base sheets, a hard sheet layer including a plurality of hard sheets, and a cover sheet layer including a plurality of cover sheets. The base sheet layer, the hard sheet layer and the cover sheet layer are spread in order on the base surface of concrete. And the sheet layers may be formed by arranging and binding the pre-made sheets. The present invention can improve durability, toughness, chemical resistance, etc significantly, shorten a work period by omitting a hardening process and resolve many environmental problems.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: September 11, 2007
    Assignees: Space Co., Ltd.
    Inventor: Sung Joo Chang