Patents by Inventor Chol Kim

Chol Kim 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: 12139000
    Abstract: A powertrain apparatus for an electric vehicle, includes a planetary gear set including three rotation elements, a first motor connected to a first rotation element of the planetary gear set, a differential engaged to a second rotation element of the planetary gear set, a second motor connected to a third rotation element of the planetary gear set, and a synchronizer configured to selectively connect or disconnect between a driveshaft coupled to one side of the differential and the second motor and to selectively connect or disconnect between the second rotation element of the planetary gear set and the third rotation element of the planetary gear set.
    Type: Grant
    Filed: March 2, 2023
    Date of Patent: November 12, 2024
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Hyuk Joon Kwon, Buhm Joo Suh, Woul Sun Choi, Seung Wook Lee, Tal Chol Kim, Yeong Il Choi
  • Patent number: 12122387
    Abstract: When a towing vehicle is driven while towing a towed vehicle having driving force, a controller of the towed vehicle determines wheel slip of the towing vehicle based on driving information of the towing vehicle and determines wheel slip of the towed vehicle based on driving information of the towed vehicle, and upon determining that wheel slip of the towing vehicle or the towed vehicle has occurred or upon determining that wheel slip of each of the towing vehicle and the towed vehicle has occurred, control to increase or decrease driving force of the towed vehicle or control to change the driving force distribution ratio between left and right wheels of the towed vehicle is performed, whereby it is possible to improve driving stability and rough road escape performance of the towing vehicle and the towed vehicle.
    Type: Grant
    Filed: July 27, 2023
    Date of Patent: October 22, 2024
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Woul Sun Choi, Buhm Joo Suh, Yeong Il Choi, Seung Wook Lee, Seok Joon Kim, Tal Chol Kim, Hyuk Joon Kwon
  • Patent number: 12094415
    Abstract: A display device comprises a display panel including a pixel, and a panel driver configured to receive input image data in a variable frame frequency in order to drive the display panel based on the input image data. A frame period for the display panel is divided into at least one scan period and at least one or more hold periods, and a time during which the pixel performs an anode initialization operation in each of the hold periods is longer than a time during which the pixel performs the anode initialization operation in the scan period.
    Type: Grant
    Filed: October 4, 2023
    Date of Patent: September 17, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jihye Kim, Yu-Chol Kim, Seongoh Yeom, Jakyoung Jin
  • Publication number: 20240296787
    Abstract: A pixel includes: a light-emitting element including an anode and a cathode, a first transistor including a first and a second electrode and a gate electrode connected with a first node, a third transistor connected between the second electrode of the first transistor and the first node and including a gate electrode connected with a first scan line, a sixth transistor connected between the second electrode of the first transistor and the anode and including a gate electrode connected with a first emission line, and a seventh transistor connected between the anode and an initialization voltage line and including a gate electrode connected with a second scan line. During an initialization period, the third, sixth, and seventh transistors are turned on such that an initialization voltage from the initialization voltage line is transferred to the gate electrode of the first transistor.
    Type: Application
    Filed: May 11, 2024
    Publication date: September 5, 2024
    Inventors: JIN-WOOK YANG, YU-CHOL KIM, DONGGYU LEE, JAE-HYEON JEON
  • Publication number: 20240278785
    Abstract: When a towing vehicle is driven while towing a towed vehicle having driving force, a controller of the towed vehicle determines wheel slip of the towing vehicle based on driving information of the towing vehicle and determines wheel slip of the towed vehicle based on driving information of the towed vehicle, and upon determining that wheel slip of the towing vehicle or the towed vehicle has occurred or upon determining that wheel slip of each of the towing vehicle and the towed vehicle has occurred, control to increase or decrease driving force of the towed vehicle or control to change the driving force distribution ratio between left and right wheels of the towed vehicle is performed, whereby it is possible to improve driving stability and rough road escape performance of the towing vehicle and the towed vehicle.
    Type: Application
    Filed: July 27, 2023
    Publication date: August 22, 2024
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Woul Sun CHOI, Buhm Joo Suh, Yeong II Choi, Seung Wook Lee, Seok Joon Kim, Tal Chol Kim, Hyuk Joon Kwon
  • Publication number: 20240257720
    Abstract: A luminance compensation method of a display device includes a first luminance for a reference grayscale at a first operating frequency and a second luminance for the reference grayscale at a second operating frequency are measured. A first reference value is calculated based on the first luminance and the second luminance, a first duty ratio of the initialization control signal is changed into a second duty ratio depending on a comparison result of the first reference value and a threshold value After the first duty ratio is changed into the second duty ratio, a third luminance for the reference grayscale is measured, and a second reference value is calculated based on the first luminance and the third luminance. A final duty ratio corresponding to the threshold value is calculated depending on a comparison result of the second reference value and the threshold value.
    Type: Application
    Filed: October 25, 2023
    Publication date: August 1, 2024
    Inventors: Seongoh YEOM, YU-CHOL KIM, JIHYE KIM, JIN-WOOK YANG, EUI-MYEONG CHO, JAKYOUNG JIN
  • Publication number: 20240249661
    Abstract: A display device includes a display panel including a plurality of pixels and a panel driver that drives the display panel in a first mode where an operating frequency is fixed, and a second mode where the operating frequency is variable. Each of the plurality of pixels includes a light-emitting element and a pixel driving circuit connected to a first electrode of the light-emitting element. The panel driver includes a driving controller that determines whether the operating frequency corresponds to one of predetermined compensation frequencies in the second mode, and outputs a voltage control signal depending on the determination result, and a voltage generator that changes a voltage level of an anode initialization voltage applied to the first electrode in response to the voltage control signal.
    Type: Application
    Filed: November 6, 2023
    Publication date: July 25, 2024
    Inventors: JAKYOUNG JIN, JIHYE KIM, YU-CHOL KIM, JIN-WOOK YANG, Seongoh YEOM, EUI-MYEONG CHO
  • Patent number: 12033566
    Abstract: A display device includes: a pixel electrically connected to a data line, a write scan line, an initialization scan line, a compensation scan line, a transmission control line, and an emission control line; a first driving circuit configured to provide a write scan signal to the write scan line and a second driving circuit configured to receive a plurality of clock signals, each of which has a time duration of one unit horizontal period and provide an initialization scan signal, a compensation scan signal, a transmission control signal, and an emission control signal to the initialization scan line, the compensation scan line, the transmission control line, and the emission control line, respectively. Each of the initialization scan signal and the compensation scan signal has an activation interval of one unit horizontal periods or more.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: July 9, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin-Wook Yang, Yu-Chol Kim, Sehyuk Park, Donggyu Lee, Jae-Hyeon Jeon
  • Publication number: 20240212588
    Abstract: A pixel connected to a first scan line includes a light-emitting element including an anode and a cathode, a first transistor including a first electrode, a second electrode, and a gate electrode connected to a first node, a first capacitor connected between the first node and a second node, a second transistor connected between the second electrode of the first transistor and the first node including a gate electrode connected to the first scan line, a third transistor including a first electrode, a second electrode connected to the second node, and a gate electrode connected to the first scan line, and a fourth transistor including a first electrode connected to a first driving voltage line, a second electrode connected to the first electrode of the first transistor, and a gate electrode connected to the first scan line.
    Type: Application
    Filed: March 6, 2024
    Publication date: June 27, 2024
    Inventors: JIN-WOOK YANG, YU-CHOL KIM, DONGGYU LEE, JAEKEUN LIM, JAE-HYEON JEON
  • Patent number: 12020652
    Abstract: A display device includes: a pixel connected to a first scan line, a second scan line, and a data line, and including a light emitting element and a storage capacitor; and a timing controller configured to drive the pixel in a normal mode in which a driving frequency is maintained constant or a frequency variable mode according to a variable frequency signal supplied from outside, wherein in the normal mode, a first electrode voltage of the light emitting element is initialized in response to a data voltage being supplied to the storage capacitor, and wherein in the frequency variable mode, the first electrode voltage of the light emitting element is not initialized in response to the data voltage being supplied to the storage capacitor.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: June 25, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ja Kyoung Jin, Yu Chol Kim, Ji Hye Kim, Jin Wook Yang, Seong Oh Yeom
  • Publication number: 20240203329
    Abstract: A display device includes a light-emitting device, a first transistor, and a second transistor connected between the first transistor and the light-emitting device and including a gate electrode which receives the emission control signal. When a driving frequency is a second frequency less than a first frequency, one frame includes an active period and a blank period, and during the active period, a pulse width of the emission control signal has a first value, and during the blank period, the pulse width of the emission control signal has a second value different from the first value.
    Type: Application
    Filed: February 27, 2024
    Publication date: June 20, 2024
    Inventors: JIHYE KIM, YU-CHOL KIM, Seongoh YEOM, JAKYOUNG JIN
  • Patent number: 12008952
    Abstract: A pixel includes: a light-emitting element including an anode and a cathode, a first transistor including a first and a second electrode and a gate electrode connected with a first node, a third transistor connected between the second electrode of the first transistor and the first node and including a gate electrode connected with a first scan line, a sixth transistor connected between the second electrode of the first transistor and the anode and including a gate electrode connected with a first emission line, and a seventh transistor connected between the anode and an initialization voltage line and including a gate electrode connected with a second scan line. During an initialization period, the third, sixth, and seventh transistors are turned on such that an initialization voltage from the initialization voltage line is transferred to the gate electrode of the first transistor.
    Type: Grant
    Filed: July 20, 2023
    Date of Patent: June 11, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin-Wook Yang, Yu-Chol Kim, Donggyu Lee, Jae-Hyeon Jeon
  • Publication number: 20240169926
    Abstract: A display device includes pixels including a light-emitting element, and an initialization transistor connected between an anode electrode of the light-emitting element and a first initialization power line to which a voltage of initialization power is supplied, and turned on when an initialization scan signal is supplied, and an initialization scan driver which supplies the initialization scan signal. The initial scan driver supplies an i-th (i is a natural number) initial scan signal to overlap an (i?1)-th initial scan signal, and supplies an (i+1)-th initial scan signal so as not to overlap the i-th initial scan signal, and the initialization scan signal is set to a gate-on voltage.
    Type: Application
    Filed: June 6, 2023
    Publication date: May 23, 2024
    Inventors: Seong Oh YEOM, Yu Chol KIM, Ji Hye KIM, Jin Wook YANG, Eui Myeong CHO, Ja Kyoung JIN
  • Patent number: 11987496
    Abstract: A method for producing a bis(fluorosulfonyl)imide lithium salt is disclosed. The method includes the steps of: (a) reacting bis(chlorosulfonyl)imide with NH4F(HF)n (n=0-10) to prepare ammonium bis(fluorosulfonyl)imide; and (b) reacting the ammonium bis(fluorosulfonyl)imide with a lithium base, wherein in at least one of steps (a) and (b), after the reaction, a process of adding an alkoxy trialkyl silane to the reaction solution to remove a fluorine anion is performed.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: May 21, 2024
    Assignee: DAEGU CATHOLIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION
    Inventors: Sang Ryul Lee, Kyoung Chol Kim, Ja Young Park, Ji Hyeong Kim, Jeong In Kim, Seok Ju Lee, Jongyun Jang, Seongjeong Lee, Mingi Chu, Dong Wook Kang
  • Patent number: 11987666
    Abstract: Disclosed are a thermoplastic resin composition and a molded product including the same, and based on 100 parts by weight of a base resin including (A) 70 wt % to 90 wt % of a polybutylene terephthalate resin and (B) 10 wt % to 30 wt % of an acrylate-based graft copolymer, the thermoplastic resin composition includes: (C) 1 part by weight to 5 parts by weight of an epoxy group-containing methacrylate-aromatic vinyl-unsaturated nitrile copolymer; (D) 15 parts by weight to 20 parts by weight of a carbon fiber; (E) 1 part by weight to 5 parts by weight of carbon nanotubes; and (F) 18 parts by weight to 20 parts by weight of aluminum diethyl phosphinate (ADEP).
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: May 21, 2024
    Assignee: Lotte Chemical Corporation
    Inventors: In-Chol Kim, Keehae Kwon
  • Publication number: 20240161693
    Abstract: A display device includes a display panel which includes first and second pixels disposed in one pixel row, a first gate line connected to the first pixel, a second gate line connected to the second pixel, a first data line connected to the first pixel, and a second data line connected to the second pixel, a gate driver which provides a first gate signal and a second gate signal to the first gate line and the second gate line, respectively, and a data driver disposed adjacent to a first side of the display panel, where the data driver provides a data signal to the first data line. The first data line and the second data line are connected to each other at a second side of the display panel opposite to the first side of the display panel.
    Type: Application
    Filed: August 21, 2023
    Publication date: May 16, 2024
    Inventors: EUI-MYEONG CHO, YU-CHOL KIM, JIHYE KIM, JIN-WOOK YANG, SEONGOH YEOM, JAKYOUNG JIN
  • Publication number: 20240153434
    Abstract: Disclosed is a display device including a display panel including a pixel, a scan driver, and a driving controller that controls driving of the scan driver. The scan driver provides the pixel with a first mode scan signal having a first active period and a second active period in a first mode and provides the pixel with a second mode scan signal having a compensation active period in a second mode. The driving controller determines whether an operating frequency of the display device corresponds to one of predetermined compensation frequencies in a variable frequency mode, and operates the scan driver in the first mode or the second mode depending on a determination result of the determining.
    Type: Application
    Filed: August 29, 2023
    Publication date: May 9, 2024
    Inventors: JIHYE KIM, YU-CHOL KIM, JIN-WOOK YANG, Seongoh YEOM, EUI-MYEONG CHO, JAKYOUNG JIN
  • Publication number: 20240144861
    Abstract: A display device includes a display panel, a gate driver, and a driving controller. The display panel includes a pixel. The gate driver applies an anode initialization signal to the pixel. The driving controller receives a horizontal synchronization signal, receives input image data at a variable frame frequency, and controls the gate driver. A frame period for the display panel includes a scan period and one or more hold periods, the driving controller generates a count value by counting a number of pulses of the horizontal synchronization signal, and determines a current frame period as the hold period when the count value exceeds a reference value, and a time length of the anode initialization signal in each of the one or more hold periods is longer than a time length of the anode initialization signal in the scan period.
    Type: Application
    Filed: September 20, 2023
    Publication date: May 2, 2024
    Inventors: JIHYE KIM, YU-CHOL KIM, JIN-WOOK YANG, Seongoh Yeom, EUI-MYEONG CHO, JAKYOUNG JIN
  • Publication number: 20240123837
    Abstract: A method of controlling an add-on mobility includes measuring a force in a front-rear direction between a main body vehicle and the add-on mobility by a force sensor connecting the main body vehicle and the add-on mobility and controlling a driving force and a braking force of the add-on mobility according to a magnitude of the force in the front-rear direction measured by the force sensor.
    Type: Application
    Filed: April 19, 2023
    Publication date: April 18, 2024
    Inventors: Hyuk Joon Kwon, Buhm Joo Suh, Woul Sun Choi, Seung Wook Lee, Tal Chol Kim, Yeong Il Choi
  • Publication number: 20240128268
    Abstract: A semiconductor device includes channel layers on a substrate, the channel layers being spaced apart from each other, and having first side surfaces and second side surfaces opposing each other in a first direction, a gate electrode surrounding the channel layers and having a first end portion and a second end portion, opposing each other in the first direction, and a source/drain layer on a first side of the gate electrode and in contact with the channel layers, a portion of the source/drain layer protruding further than the first end portion of the gate electrode in the first direction, wherein a first distance from the first end portion of the gate electrode to the first side surfaces of the channel layers is shorter than a second distance from the second end portion of the gate electrode to the second side surfaces of the channel layers.
    Type: Application
    Filed: December 11, 2023
    Publication date: April 18, 2024
    Inventors: Krishna Kumar BHUWALKA, Kyoung Min CHOI, Takeshi OKAGAKI, Dong Won KIM, Jong Chol KIM