Patents by Inventor Ho-Chul Ryu

Ho-Chul Ryu 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: 20240109794
    Abstract: An ultraviolet light-based disinfection device and method are proposed. The ultraviolet disinfection device, according to one embodiment, may disinfect a fluid on the basis of ultraviolet light, without injecting a drug or using a harmful material such as mercury.
    Type: Application
    Filed: January 27, 2022
    Publication date: April 4, 2024
    Inventors: Hyun Chul KIM, Ho Don RYU, Seok Jong BYUN
  • Patent number: 11163407
    Abstract: An input device is provided. The input device includes a communicator for communicating with an electronic device, a pen tip provided on one end portion of the input device, an electrode part provided at a position spaced apart at a predetermined interval from the pen tip, and a processor configured to apply a predetermined frequency signal to the electrode part, and control the communicator so as to transmit, to the electronic device, the signal of which frequency changed according to a capacitance formed between the electrode part and the electronic device.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: November 2, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung-sun Lee, Kang-yoon Lee, Sung-hun Cho, Gwan-hyung Kim, Sang-yun Kim, Ho-chul Ryu, Sang-ho Kim
  • Patent number: 11150770
    Abstract: Disclosed is an input device. The input device includes a communicator configured to communicate with an electronic device, a pen tip provided at one end of the input device, a first electrode portion including a plurality of first sub-electrodes spaced apart from each other by a predetermined distance from the pen tip, a second electrode portion including a plurality of second sub-electrodes spaced apart from each other to correspond to each of the plurality of first sub-electrodes at a position spaced apart from the first electrode portion by a predetermined distance, a processor to provide a driving signal to the first electrode portion and the second electrode portion, generate tilt information of the input device on the basis of a plurality of capacitances formed between the plurality of first sub-electrodes and the plurality of second sub-electrodes, and transmit the tilt information to the electronic device.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: October 19, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Hyung-sun Lee, Kang-yoon Lee, Sung-hun Cho, Gwan-hyung Kim, Sang-yun Kim, Ho-chul Ryu, Sang-ho Kim
  • Publication number: 20210124472
    Abstract: An input device is provided. The input device includes a communicator for communicating with an electronic device, a pen tip provided on one end portion of the input device, an electrode part provided at a position spaced apart at a predetermined interval from the pen tip, and a processor configured to apply a predetermined frequency signal to the electrode part, and control the communicator so as to transmit, to the electronic device, the signal of which frequency changed according to a capacitance formed between the electrode part and the electronic device.
    Type: Application
    Filed: February 7, 2018
    Publication date: April 29, 2021
    Inventors: Hyung-sun LEE, Kang-yoon LEE, Sung-hun CHO, Gwan-hyung KIM, Sang-yun KIM, Ho-chul RYU, Sang-ho KIM
  • Publication number: 20200192523
    Abstract: Disclosed is an input device. The input device includes a communicator configured to communicate with an electronic device, a pen tip provided at one end of the input device, a first electrode portion including a plurality of first sub-electrodes spaced apart from each other by a predetermined distance from the pen tip, a second electrode portion including a plurality of second sub-electrodes spaced apart from each other to correspond to each of the plurality of first sub-electrodes at a position spaced apart from the first electrode portion by a predetermined distance, a processor to provide a driving signal to the first electrode portion and the second electrode portion, generate tilt information of the input device on the basis of a plurality of capacitances formed between the plurality of first sub-electrodes and the plurality of second sub-electrodes, and transmit the tilt information to the electronic device.
    Type: Application
    Filed: February 7, 2018
    Publication date: June 18, 2020
    Inventors: Hyung-sun LEE, Kang-yoon LEE, Sung-hun CHO, Gwan-hyung KIM, Sang-yun KIM, Ho-chul RYU, Sang-ho KIM
  • Patent number: 7411751
    Abstract: Provided is an optical pickup actuator for writing/reading data in/from an optical storage medium. The optical pickup actuator includes a heat sink member or a heat conductive material for minimizing a bad influence of heat generated from a coil.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: August 12, 2008
    Assignee: LG Electronics Inc.
    Inventors: Jung Eung Park, Ho Chul Ryu, Sam Nyol Hong
  • Patent number: 7269009
    Abstract: A case for covering electronic parts and efficiently discharging heat generated from the electronic parts and a display apparatus including the case are provided. The case includes at least one partition wall partially separating at least an inner space of the case. An entry portion, through which air flows in, and an exit portion, through which the air having flowed in through the entry portion and then having absorbed heat from the electronic parts flows out, are formed in each plane of the case. Each plane is separated by the partition wall.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: September 11, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ho-Chul Ryu, Sung-Won Bae
  • Patent number: 7038360
    Abstract: A plasma display device that uses a plasma display panel to enable use as an image device such as a television. The plasma display device includes a plasma display panel, a chassis base including a circuit assembly for driving the plasma display panel and regulating members mounted in a vicinity of the circuit assembly on a surface of the chassis base to which the circuit assembly is provided, said regulating members regulating the flow of air in the area of the chassis base.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: May 2, 2006
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sung-Won Bae, Ho-Chul Ryu
  • Publication number: 20040036819
    Abstract: A case for covering electronic parts and efficiently discharging heat generated from the electronic parts and a display apparatus including the case are provided. The case includes at least one partition wall partially separating at least an inner space of the case. An entry portion, through which air flows in, and an exit portion, through which the air having flowed in through the entry portion and then having absorbed heat from the electronic parts flows out, are formed in each plane of the case. Each plane is separated by the partition wall.
    Type: Application
    Filed: August 12, 2003
    Publication date: February 26, 2004
    Inventors: Ho-Chul Ryu, Sung-Won Bae
  • Publication number: 20040036413
    Abstract: A plasma display device that uses a plasma display panel to enable use as an image device such as a television. The plasma display device includes a plasma display panel, a chassis base including a circuit assembly for driving the plasma display panel and regulating members mounted in a vicinity of the circuit assembly on a surface of the chassis base to which the circuit assembly is provided, said regulating members regulating the flow of air in the area of the chassis base.
    Type: Application
    Filed: August 20, 2003
    Publication date: February 26, 2004
    Inventors: Sung-Won Bae, Ho-Chul Ryu