Patents by Inventor Hyun Song Lee

Hyun Song 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).

  • Publication number: 20240138260
    Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising a specific combination of host compounds and/or an organic electroluminescent compound according to the present disclosure as an organic electroluminescent material, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan characteristics can be provided.
    Type: Application
    Filed: September 8, 2023
    Publication date: April 25, 2024
    Inventors: Ji-Song JUN, Hong-Se OH, Dong-Hyung LEE, Sang-Hee CHO, Du-Yong PARK, Hyun-Woo KANG, Jin-Man KIM
  • Patent number: 11912916
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 1 and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, it is possible to provide an organic electroluminescent device having lower operating voltage, higher luminous efficiency and/or longer lifespan properties as compared with a conventional organic electroluminescent device.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: February 27, 2024
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Hyun Kim, Ji-Song Jun, Jeong-Hwan Jeon, Yeon-Gun Lee, Seon-Jin Hwang, Young-Jun Cho
  • Patent number: 10602365
    Abstract: A private network service providing method and system for breaking dependency on a terminal and providing a private network service is provided.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: March 24, 2020
    Assignee: KT Corporation
    Inventors: Hyun-Song Lee, Sang-Woo Woo, Yong-Joo Cha
  • Publication number: 20180295509
    Abstract: A private network service providing method and system for breaking dependency on a terminal and providing a private network service is provided.
    Type: Application
    Filed: April 11, 2016
    Publication date: October 11, 2018
    Applicant: KT Corporation
    Inventors: Hyun-Song LEE, Sang-Woo WOO, Yong-Joo CHA
  • Patent number: 10064096
    Abstract: The disclosure is related to a method for distributing data traffic of a wireless local area network (WLAN) in a WLAN access network while providing service continuity and internet protocol (IP) mobility in a heterogeneous network environment. The method may include receiving data traffic generated by user equipment and from a wireless local area network, selecting one of a first data path and a second data path for the received data traffic based on path decision information associated with the received data traffic, and transmitting the data traffic to Internet through the selected data path. The first data path may transmit the data traffic to Internet through a packet data network (PDN) gateway and the second data path may transmit the data traffic to Internet without passing through the PDN gateway.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: August 28, 2018
    Assignee: KT CORPORATION
    Inventors: Hyun-Song Lee, Sung-Hoon Seo, Jai-Sop Hyun, Kyung-Ah Kim
  • Patent number: 10015704
    Abstract: A first base station may perform a method for controlling handover of a terminal. The method may include setting a handover parameter that is determined based on a handover policy and transmitting a message including the handover parameter to the terminal. The handover parameter includes a service parameter. The service parameter is used when determining a handover condition of the terminal in order to induce handover from the first base station to the second base station according to the handover policy.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: July 3, 2018
    Assignee: KT CORPORATION
    Inventors: Hyun-Song Lee, Si-Young Heo, Kyungjun Lee, Yongjoo Tcha
  • Patent number: 9900269
    Abstract: The present application relates to a control function related to a trigger in a communication network for machine-type communication. A method for triggering a terminal comprises the steps of: receiving a trigger request message from a trigger request transmission server which transmits trigger requests from external servers; and transmitting the trigger request message to a terminal using a received short message, wherein transmission parameters of the short message indicates that the received short message is a short message for triggering a machine-type communication (MTC) apparatus.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: February 20, 2018
    Assignee: KT CORPORATION
    Inventors: Sung Pyo Hong, Soo Hyun Cho, Hyun Song Lee, Sung Hoon Lee
  • Publication number: 20150341834
    Abstract: A first base station may perform a method for controlling handover of a terminal. The method may include setting a handover parameter that is determined based on a handover policy and transmitting a message including the handover parameter to the terminal. The handover parameter includes a service parameter. The service parameter is used when determining a handover condition of the terminal in order to induce handover from the first base station to the second base station according to the handover policy.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 26, 2015
    Applicant: KT CORPORATION
    Inventors: Hyun-Song LEE, Si-Young HEO, Kyungjun LEE, Yongjoo TCHA
  • Publication number: 20150117209
    Abstract: The disclosure is related to a method for distributing data traffic of a wireless local area network (WLAN) in a WLAN access network while providing service continuity and internet protocol (IP) mobility in a heterogeneous network environment. The method may include receiving data traffic generated by user equipment and from a wireless local area network, selecting one of a first data path and a second data path for the received data traffic based on path decision information associated with the received data traffic, and transmitting the data traffic to Internet through the selected data path. The first data path may transmit the data traffic to Internet through a packet data network (PDN) gateway and the second data path may transmit the data traffic to Internet without passing through the PDN gateway.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventors: Hyun-Song LEE, Sung-Hoon SEO, Jai-Sop HYUN, Kyung-Ah KIM
  • Publication number: 20140258434
    Abstract: The present application relates to a control function related to a trigger in a communication network for machine-type communication. A method for triggering a terminal comprises the steps of: receiving a trigger request message from a trigger request transmission server which transmits trigger requests from external servers; and transmitting the trigger request message to a terminal using a received short message, wherein transmission parameters of the short message indicates that the received short message is a short message for triggering a machine-type communication (MTC) apparatus.
    Type: Application
    Filed: October 5, 2012
    Publication date: September 11, 2014
    Applicant: KT CORPORATION
    Inventors: Sung Pyo Hong, Soo Hyun Cho, Hyun Song Lee, Sung Hoon Lee