Patents by Inventor Chang-Hee Joo

Chang-Hee Joo 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: 11935876
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: March 19, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Bo Sim, Duk Ki Kim, Yong Hwi Kim, Hyo Jin Ko, Chang Hee Lee, Chan Woo Joo, Jae Kook Ha, Na Mi Hong
  • Publication number: 20230132791
    Abstract: A frequency resource allocation apparatus comprising a processor is configured to select resources for transmitting a signal to a user based on a learning model, allocate the selected resources to the user, transmit the signal to the user using the selected resources, receive information about whether the transmission of the signal is successful or not from the user via a feedback channel after a delayed time, and update an internal parameter of the learning model with respect to the resources used for transmitting the signal.
    Type: Application
    Filed: November 1, 2022
    Publication date: May 4, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Bon Jun KU, Dae Sub OH, Chang Hee JOO, Ji Hyeon YUN, Tae Gun AN, Hae Sung JO
  • Patent number: 10608925
    Abstract: The present invention provides a method for forwarding an uplink packet performed by a node in a wireless communication system, the method being characterized in that the uplink packet including a first cost is received, the first cost is compared with a second cost corresponding to a cost of the node to determine whether to forward the uplink packet, and on the basis of the determination the uplink packet is forwarded, the node forwards the uplink packet when a value of the second cost is smaller than a value of the first cost, and the node does not forward the uplink packet when the second cost value is not smaller than the first cost value.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 31, 2020
    Assignees: LG ELECTRONICS INC., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Seungmin Lee, Dae Ho Kang, Seungbeom Jeong, Sae Woong Bahk, Chang Hee Joo
  • Publication number: 20180375756
    Abstract: The present invention provides a method for forwarding an uplink packet performed by a node in a wireless communication system, the method being characterized in that the uplink packet including a first cost is received, the first cost is compared with a second cost corresponding to a cost of the node to determine whether to forward the uplink packet, and on the basis of the determination the uplink packet is forwarded, the node forwards the uplink packet when a value of the second cost is smaller than a value of the first cost, and the node does not forward the uplink packet when the second cost value is not smaller than the first cost value.
    Type: Application
    Filed: December 8, 2016
    Publication date: December 27, 2018
    Applicants: LG ELECTRONICS INC., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Seungmin LEE, Dae Ho KANG, Seungbeom JEONG, Sae Woong BAHK, Chang Hee JOO
  • Patent number: 10057147
    Abstract: Provided is an apparatus for controlling a data flow for multiple paths in a receiving node of a communication system. The apparatus includes a receiver configured to receive data for a specific sub-flow among a plurality of sub-flows; a controller configured to calculate an optimal transmission rate of the received data, determine a window reference value for generating the optimal transmission rate, and generate an artificial response message if a window size for the specific sub-flow is greater than or equal to the window reference value; and a transmitter configured to transmit the artificial response message to a transmitting node.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 21, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se-Yong Park, Sae-Woong Bahk, Chang-Hee Joo, Yong-Seok Park, Do-Jun Byun, Chul-Ho Lee
  • Publication number: 20160094465
    Abstract: Provided is an apparatus for controlling a data flow for multiple paths in a receiving node of a communication system. The apparatus includes a receiver configured to receive data for a specific sub-flow among a plurality of sub-flows; a controller configured to calculate an optimal transmission rate of the received data, determine a window reference value for generating the optimal transmission rate, and generate an artificial response message if a window size for the specific sub-flow is greater than or equal to the window reference value; and a transmitter configured to transmit the artificial response message to a transmitting node.
    Type: Application
    Filed: September 25, 2015
    Publication date: March 31, 2016
    Inventors: Se-Yong Park, Sae-Woong Bahk, Chang-Hee Joo, Yong-Seok Park, Do-Jun Byun, Chul-Ho Lee