Patents by Inventor Jong Hak Choi

Jong Hak Choi 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: 20250067623
    Abstract: Disclosed is a device for processing a substrate, the device including: a support unit including a spin chuck supporting a substrate, a rotation shaft supporting the spin chuck, and a driver providing rotational force to the rotation shaft; and a determination unit for determining whether the rotation shaft is defective, in which the determination unit determines whether the rotation shaft is defective based on a current value applied to the driver while the rotation shaft is rotating.
    Type: Application
    Filed: August 1, 2024
    Publication date: February 27, 2025
    Applicant: SEMES CO., LTD.
    Inventors: Jong Hak CHOI, Wan Hee HAN, Han Seon KANG, Jung Min YOON, Dae Il JANG
  • Publication number: 20240223008
    Abstract: A wireless charging apparatus of the present invention includes a heat radiation module, a circuit board disposed in the heat radiation module, and a power module disposed in the heat radiation module and having a coil for wireless charging, wherein the heat radiation module includes a case body in which the circuit board and the power module are housed, and a partition part formed inside the case body to form a separation space between the circuit board and the power module.
    Type: Application
    Filed: February 22, 2022
    Publication date: July 4, 2024
    Inventors: Nah Young KIM, Seung Hwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20240208346
    Abstract: An electric vehicle of the present invention includes a footrest, an extension part which comprises a housing frame extending from the footrest, and a steering tube rotatably coupled to the housing frame, a handlebar coupled to the steering tube to control a driving direction and a power reception apparatus which surrounds at least a portion of an outer surface of the extension part.
    Type: Application
    Filed: February 11, 2022
    Publication date: June 27, 2024
    Inventors: Nah Young KIM, Seung Hwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20240001790
    Abstract: A wireless charging device according to an embodiment can effectively dissipate heat generated in a magnetic part, without causing a short circuit of a coil part or degradation of charging efficiency by having the magnetic part placed in a cooling part separated from the coil part and circulating cooling water in the cooling part. Therefore, the wireless charging device can be usefully used in a transportation means, such as an electric vehicle, which requires high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 15, 2021
    Publication date: January 4, 2024
    Inventors: Seunghwan LEE, Tae Kyoung KIM, Jong Hak CHOI, Nah Young KIM
  • Publication number: 20230402874
    Abstract: A wireless charging device according to one embodiment has an inductance deviation at 80° C. of 0 or more, and has a magnetic part that has a permeability change rate (?P1) of 0/° C. or more, thus having excellent high-temperature stability, and being able to maintain excellent charging efficiency even at high temperature. Therefore, the wireless charging device can be useful in a transportation means such as an electric vehicle requiring large-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 19, 2021
    Publication date: December 14, 2023
    Inventors: Nah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20230369894
    Abstract: The wireless charging device according to an embodiment allows adjustment of characteristics, including the distance between a coil and a magnetic material, to be within particular numerical ranges and thus has high charging efficiency, facilitates assembly, and can be improved in durability. Therefore, the wireless charging device is useful in a transportation means, such as an electric vehicle, requiring high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 15, 2021
    Publication date: November 16, 2023
    Inventors: Nah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20230365006
    Abstract: A wireless charging apparatus according to an embodiment includes a magnetic unit with a low strain rate (thermal strain) at 180° C., wherein a position change (?DR1) at 180° C. is 0.07 or less, to thereby provide the magnetic unit with improved heat resistance and magnetic properties and prevent deformation and damage of the magnetic unit during wireless charging, and further improve the high temperature stability and charging efficiency. Therefore, the wireless charging apparatus can be efficiently used in personal transportation means such as electric motorcycles, electric kickboards, electric scooters, electric wheelchairs, and electric bicycles, as well as transportation means such as electric vehicles requiring large-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: January 12, 2022
    Publication date: November 16, 2023
    Inventors: Nah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20230339337
    Abstract: A wireless charging device according to an embodiment can enhance charging efficiency and minimize heat generation while having an appropriate thickness by satisfying a specific expression in which characteristics including the distance between a magnetic part and a shield part and a Q factor are reflected. Therefore, the wireless charging device is useful for a mobility means, such as an electric vehicle, requiring high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 15, 2021
    Publication date: October 26, 2023
    Inventors: Nah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20230344274
    Abstract: A wireless charging device according to the present invention comprises a hybrid-type magnetic unit including a first magnetic unit and a second magnetic unit and, by adjusting the magnetic permeability, inductance, and arrangement structure of the units, can effectively reduce a heat generated during high power density wireless charging and enhance charging efficiency. Therefore, the wireless charging device can be efficiently used in various fields of personal transportation means such as electric motorcycles, electric kickboards, electric scooters, electric wheelchairs, and electric bicycles, as well as fields requiring large-capacity power transmission such as electric vehicles.
    Type: Application
    Filed: July 27, 2021
    Publication date: October 26, 2023
    Inventors: Nah Young KIM, Seunhwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20230336026
    Abstract: A wireless charging apparatus for a transportation means according to an embodiment comprises a magnetic unit having a moisture absorption rate adjusted to a specific range, and accordingly, high magnetic properties and charging efficiency may be provided under a frequency and high power applied to wireless charging. Therefore, the wireless charging apparatus can be applied to a transportation means, such as an electric vehicle requiring a large amount of power transmission between a transmitter and a receiver.
    Type: Application
    Filed: March 25, 2022
    Publication date: October 19, 2023
    Inventors: Jong Hak CHOI, Tae Kyoung KIM, Nah Young KIM, Seunghwan LEE
  • Publication number: 20230057615
    Abstract: A wireless power receiver includes a receiving pad configured to receive power transmitted from a wireless power transmitter including a transmitting pad and a transmitting side resonant inductor, and a receiving side resonant network including a receiving side resonant inductor that controls power supplied to the receiving pad. Further, a first inductance of the receiving side resonant inductor and a second inductance of the transmitting side resonant inductor are determined to be different from each other.
    Type: Application
    Filed: October 7, 2022
    Publication date: February 23, 2023
    Inventors: Nah Young KIM, Seung Hwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20220416575
    Abstract: The present invention relates to a wireless charging device and a mobile means including same. Specifically, according to an embodiment of the present invention, a wireless charging device comprises: a coil unit, a magnetic unit arranged on the coil unit; and a heat transfer unit arranged in contact with at least a portion of the magnetic unit, thereby efficiently transferring heat generated in the magnetic unit to the outside and further improving heat dissipation and charging efficiency. Therefore, the wireless charging device can be advantageously used in a mobile means such as an electric vehicle requiring a large amount of power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 6, 2020
    Publication date: December 29, 2022
    Inventors: Nah Young KIM, Seunghwan LEE, Jong Hak CHOI, Tae Kyoung KIM
  • Publication number: 20220410730
    Abstract: A wireless charging device according to an embodiment, can effectively discharge heat by including an insulating heat dissipation part in the inner part of a magnetic part or between the magnetic part and a coil part. Therefore, the wireless charging device can be effectively used for a transportation means such as an electric vehicle that requires high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: November 20, 2020
    Publication date: December 29, 2022
    Inventors: Tae Kyoung KIM, Nah Young KIM, Jong Hak CHOI, Seunghwan LEE
  • Publication number: 20220402377
    Abstract: A wireless charging apparatus according to an embodiment can improve heat dissipation and charging efficiency by adjusting the surface area of a magnetic pad. Therefore, the wireless charging apparatus can be effectively used for a transportation means, such as an electric vehicle, which requires high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: January 27, 2021
    Publication date: December 22, 2022
    Inventors: Tae Kyoung KIM, Jong Hak CHOI, Nah Young KIM, Seunghwan LEE
  • Publication number: 20220351892
    Abstract: A wireless charging apparatus according to an embodiment may improve both the charging efficiency and the heat dissipation characteristics by use of a three-dimensional structure in a magnetic portion. In detail, the wireless charging efficiency may be increased and heat generated from the magnetic portion may be lowered by increasing the thickness of the magnetic portion near a coil portion, where electromagnetic energy is concentrated during wireless charging, and by reducing the thickness of the magnetic portion in the center, where the density of the electromagnetic energy is relatively low. Accordingly, the wireless charging apparatus can be efficiently used in a mobile means such as an electric vehicle that requires transmission of a large amount of power between a transmitter and a receiver.
    Type: Application
    Filed: October 30, 2020
    Publication date: November 3, 2022
    Inventors: Tae Kyoung KIM, Jong Hak CHOI, Nah Young KIM, Seunghwan LEE
  • Publication number: 20220332197
    Abstract: A wireless charging device according to one embodiment comprises two types of magnetic parts having different magnetic properties, wherein the two types of magnetic parts can be appropriately arranged to effectively disperse heat, generated during wireless charging, through the distribution of magnetic flux, and improve durability against external shock or distortion. Accordingly, the wireless charging device may be usefully used in a transportation means, such as an electric vehicle, that requires a large amount of power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 29, 2020
    Publication date: October 20, 2022
    Inventors: Tae Kyoung KIM, Jong Hak CHOI, Nah Young KIM, Seunghwan LEE
  • Publication number: 20220328232
    Abstract: A wireless charging device according to one implementation embodiment comprises a flow path arranged inside a magnetic unit or at an adjacent portion, and has cooling fluid flowing into the flow path so as to come in contact with the magnetic unit, and thus the heat generated during wireless charging can be readily discharged. Therefore, the wireless charging device can be effectively useful for a moving means such as an electric vehicle that requires high-capacity power transmission between a transmitter and a receiver.
    Type: Application
    Filed: October 29, 2020
    Publication date: October 13, 2022
    Inventors: Seunghwan LEE, Tae Kyoung KIM, Jong Hak CHOI, Nah Young KIM
  • Patent number: 10991197
    Abstract: Provided is a game machine system including a game machine capable of progressing different kinds of games and a table games with different kinds of the games, the game machine system including an administration controller connected to a plurality of game machines and the game machine capable of displaying progress of a game selected from a plurality of kinds of games and a result of the game, in which the game machine includes an operating device with which a player operates the progress of the game, and the progress of the game connected to the administration controller is performed by operation of the operating device of the game machine selected by the administration controller.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: April 27, 2021
    Assignee: JT CO., LTD.
    Inventors: Hidehiko Sakamoto, Jong Hak Choi, Hideo Takeda, Hiroaki Kashima
  • Patent number: 10964166
    Abstract: Disclosed is an operating device of a game machine which is installed in the game machine including a display portion which displays the progress of a game in accordance with a control of a body controller and a result of the game and operates the progress of the game in conjunction with a display on the display portion. This operating device includes a rotation operation portion capable of being rotated by a player, a rotation operation detecting portion which detects a state of rotation operation of the rotation operation portion, a decoration display portion which displays any one of a pattern, a symbol and a letter, or a combination thereof, and a connection portion which outputs a signal of the rotation operation detecting portion to the body controller and inputs a signal for controlling a display of the decoration display portion from the body controller.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: March 30, 2021
    Assignee: JT CO., LTD.
    Inventors: Hidehiko Sakamoto, Jong Hak Choi, Hideo Takeda, Nobuyuki Matsutani, Hiroaki Kashima, Yuta Kikuchi, Takashi Mega, Akito Inoue, Yoshinori Ogawa, Yoshihisa Tanaka, Yuki Hamamoto, Rui Kaga, Takaaki Hirama, Noriyuki Ikarashi
  • Publication number: 20200043292
    Abstract: Disclosed is an operating device of a game machine which is installed in the game machine including a display portion which displays the progress of a game in accordance with a control of a body controller and a result of the game and operates the progress of the game in conjunction with a display on the display portion. This operating device includes a rotation operation portion capable of being rotated by a player, a rotation operation detecting portion which detects a state of rotation operation of the rotation operation portion, a decoration display portion which displays any one of a pattern, a symbol and a letter, or a combination thereof, and a connection portion which outputs a signal of the rotation operation detecting portion to the body controller and inputs a signal for controlling a display of the decoration display portion from the body controller.
    Type: Application
    Filed: January 31, 2019
    Publication date: February 6, 2020
    Applicant: JT CO.,LTD.
    Inventors: Hidehiko Sakamoto, Jong Hak Choi, Hideo Takeda, Nobuyuki Matsutani, Hiroaki Kashima, Yuta Kikuchi, Takashi Mega, Akito Inoue, Yoshinori Ogawa, Yoshihisa Tanaka, Yuki Hamamoto, Rui Kaga, Takaaki Hirama, Noriyuki Ikarashi