Patents by Inventor Chang-hwan Yang

Chang-hwan Yang 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: 20220229410
    Abstract: The present invention relates to an apparatus and a method for setting up a board ID of a board used for a controller in a HVDC system that is capable of shortening inspection time of a board by easily identifying a location and a type of the board for inspection mounted. The apparatus for setting up a board ID of a board used for a controller in a HVDC system in the present invention comprises: IO boards for controlling submodules; a main board for managing the at least one IO board, and a backplane for connecting the main board with the at least one IO board.
    Type: Application
    Filed: December 30, 2020
    Publication date: July 21, 2022
    Inventors: Jae Keun NO, Sung Min OH, Chang Hwan YANG
  • Publication number: 20200258702
    Abstract: A gas circuit breaker of a gas-insulated switchgear is proposed. The gas circuit breaker includes a driving part (10) that operates when fault current occurs, and a fixed part (20) that is coupled to and separated from the driving part (10), thereby establishing electric connection. The driving part (10) includes a first main electrode (12) and a first arc electrode (14). The fixed part (20) includes a second main electrode (22) that is coupled to and separated from the first main electrode (12). The fixed part (20) also includes a second arc electrode (24). The first arc electrode (14) and the second arc electrode (24) are separated after separation of the first and second main electrodes (12, 22), thereby generating an arc. A first activation lever (30) is connected to a first connection link (19). A second activation lever (40) is connected to the first activation lever (30).
    Type: Application
    Filed: May 28, 2018
    Publication date: August 13, 2020
    Inventors: Seung Kyu LEE, Kwang Jin KIM, So Hae CHOI, Chang Hwan YANG, Won Ho CHOI
  • Publication number: 20190374940
    Abstract: The present disclosure relates to a method of accelerating a flow velocity in a lateral-flow microfluidic chip in which an analysis time is not delayed while sequential reactions are possible in the lateral-flow microfluidic chip by accelerating a flow velocity in at least a section of a channel, it is easy to manufacture the microfluidic chip for applying the method, and it is possible to mass-produce the microfluidic chip, and more particularly, by increasing a vapor pressure around a specific channel, a flow velocity of a fluid in the corresponding channel is accelerated.
    Type: Application
    Filed: December 20, 2018
    Publication date: December 12, 2019
    Applicants: The Industry & Academic Cooperation in Chungnam National University (IAC), ISIN TECHNOLOGY CO., LTD.
    Inventors: Chang Soo LEE, Seong Geun JEONG, Jin Hyeon LEE, Na Mi SONG, Chang Hwan YANG
  • Patent number: 7139167
    Abstract: A computer having a computer main body mounted with a plurality of hardware, the computer also having: a port part provided on a part of the main body and having at least one port; a cover slidably connected to the computer main body to open and close the port part; and a guide gear, provided between the cover and the port part, to guide the cover to slide between an open position, at which the cover opens the port part, and a closed position, at which the cover closes the port part. Thus, the cover slides smoothly to open and close the port part.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: November 21, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-hwan Yang
  • Patent number: 6944013
    Abstract: A computer having a main cabinet to which a hard disk drive can be mounted easily and quickly, comprises a hard disk casing having a support bracket with an opening and a movable bracket. The support bracket is installed on the main cabinet, and receives at least one hard disk drive through the opening. The movable bracket closes at least a part of the opening of the support bracket and comprises a hinge part movably supporting the movable bracket relative to the support bracket, and at least one first supporting projection projected from a plane of the movable bracket toward the opening and inserted into a first screw hole provided in a first side of the hard disk drive at a closing position of the movable bracket to support the hard disk drive.
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: September 13, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-hwan Yang
  • Publication number: 20050030709
    Abstract: A computer having a computer main body mounted with a plurality of hardware, the computer also having: a port part provided on a part of the main body and having at least one port; a cover slidably connected to the computer main body to open and close the port part; and a guide gear, provided between the cover and the port part, to guide the cover to slide between an open position, at which the cover opens the port part, and a closed position, at which the cover closes the port part. Thus, the cover slides smoothly to open and close the port part.
    Type: Application
    Filed: August 6, 2004
    Publication date: February 10, 2005
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Chang-hwan Yang
  • Patent number: 6778408
    Abstract: A computer includes a main casing having an opening to accommodate a plurality of hardware components, a movable casing rotatably combined to the main casing to cover and uncover the opening of the main casing, and a stopper located on one of the main casing and the movable casing. The stopper rotates between a stop position, at which the stopper prevents the movable casing from closing the opening at a predetermined angle, and a withdrawal position at which the stopper allows the movable casing to close the opening. Thus, the movable casing rotatably combined to the main casing, is stopped from closing the opening of the main casing while a casing of the computer is opened to replace or repair hardware components, thereby preventing accidents.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: August 17, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-hwan Yang
  • Publication number: 20040001308
    Abstract: A computer having a main cabinet to which a hard disk drive can be mounted easily and quickly, comprises a hard disk casing having a support bracket with an opening and a movable bracket. The support bracket is installed on the main cabinet, and receives at least one hard disk drive through the opening. The movable bracket closes at least a part of the opening of the support bracket and comprises a hinge part movably supporting the movable bracket relative to the support bracket, and at least one first supporting projection projected from a plane of the movable bracket toward the opening and inserted into a first screw hole provided in a first side of the hard disk drive at a closing position of the movable bracket to support the hard disk drive.
    Type: Application
    Filed: February 10, 2003
    Publication date: January 1, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Chang-Hwan Yang
  • Publication number: 20030107880
    Abstract: A computer includes a main casing having an opening to accommodate a plurality of hardware components, a movable casing rotatably combined to the main casing to cover and uncover the opening of the main casing, and a stopper located on one of the main casing and the movable casing. The stopper rotates between a stop position, at which the stopper prevents the movable casing from closing the opening at a predetermined angle, and a withdrawal position at which the stopper allows the movable casing to close the opening. Thus, the movable casing rotatably combined to the main casing, is stopped from closing the opening of the main casing while a casing of the computer is opened to replace or repair hardware components, thereby preventing accidents.
    Type: Application
    Filed: June 11, 2002
    Publication date: June 12, 2003
    Applicant: Samsung Electronics Co., Ltd
    Inventor: Chang-hwan Yang
  • Patent number: 6304250
    Abstract: A low power-consumption keyboard with a pointing device attachable thereto and for use with the same comprises: a battery for supplying a power source voltage for the keyboard; a key matrix having a set of keys for generating a key code corresponding to a depressed key of the keys; a key function indicator for indicating a key function state corresponding to a depressed specific function key of the keys; a controller for selectively controlling the key code to be transmitted to the computer system by either wire communication or wireless communication; and a wireless transceiver for converting the key code into a wireless signal and for transmitting the wireless signal to the computer system. With this construction, the key function indicator is disabled during wireless communication and enabled during wire communication.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: October 16, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-Hwan Yang, Sung-Soo Kim