Patents by Inventor Tae Choi

Tae 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).

  • Patent number: 10759292
    Abstract: A current stabilization method performed by a vehicle charging apparatus, which includes a power factor corrector for correcting a power factor of an alternating current (AC) power source, vehicle charging apparatus converting an AC voltage of the AC power source into a direct current (DC) voltage to charge a vehicle battery, may include downwardly-adjusting a current control bandwidth of the power factor corrector when the adjusting of the current control bandwidth of the power factor corrector is requested.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Hui Sung Jang, Gyu Tae Choi, Gi Bong Son, Hyun Wook Seong
  • Publication number: 20200258453
    Abstract: A display device includes: a substrate; a gate pattern disposed on the substrate; an oxide semiconductor layer disposed on the substrate, the oxide semiconductor layer includes a channel region that overlaps with the gate pattern; and an insulating film disposed on the gate pattern, the insulating film includes majority carrier supporting ions, wherein the gate pattern includes a plurality of gate holes, wherein the gate holes are formed inside a region of the gate pattern that does not overlap with the channel region of the oxide semiconductor layer, and wherein the channel region of the oxide semiconductor layer includes the majority carrier supporting ions.
    Type: Application
    Filed: February 10, 2020
    Publication date: August 13, 2020
    Inventors: Ki Ju Im, Tae Young Kim, Hyo Jung Kim, Jong Woo Park, Young Tae Choi, Hyun Cheol Hwang
  • Publication number: 20200243006
    Abstract: A display device includes a plurality of pixels. Each pixel includes a first transistor that controls an amount of current received from a first power supply voltage line connected via a second node to an organic light emitting diode in response to a voltage of a first node, a second transistor connected between a data line and the second node and that includes a first gate electrode connected to a first scan line, a light emitting line connected to a gate electrode of at least one light emitting transistor located in a current path between the first power supply voltage line and the organic light emitting diode, and a seventh transistor connected between one of at least one second gate electrode of the second transistor and the light emitting line. Accordingly, a threshold voltage of a switching transistor included in each of the plurality of pixels may be negatively shifted.
    Type: Application
    Filed: September 11, 2019
    Publication date: July 30, 2020
    Inventors: Hyo Jung KIM, Tae Young KIM, Yong Sung Park, Jong Woo Park, Mi Seon SEO, Keun Soo LEE, Ki Ju IM, Dae Youn CHO, Young Tae CHOI, Hyun Cheol HWANG
  • Publication number: 20200235283
    Abstract: The present invention relates to compositions obtained by mixing specific electroactive fluoro-terpolymers and specific electroactive fluorinated copolymers. The invention also concerns liquid formulations (inks) that can be used through conventional processing technologies for printed electronics and microelectronics in a safe environment, based on these compositions. Another aspect of this invention are the films manufactured using these formulations, and the devices comprising at least one layer of these films.
    Type: Application
    Filed: July 19, 2018
    Publication date: July 23, 2020
    Applicant: ARKEMA FRANCE
    Inventors: Fabrice DOMINGUES DOS SANTOS, Seung Tae CHOI, Hung Viet TRAN
  • Publication number: 20200227644
    Abstract: Disclosed herein is an organic light-emitting diode comprising: a first electrode; a second electrode facing the first electrode; a light-emitting layer interposed between the first electrode and the second electrode, wherein the light-emitting layer contains at least one of fused ring compounds represented by Chemical Formula A and at least one of hetero ring compounds represented by Chemical Formula D, the Chemical formulas A and B being as defined in the description of the invention.
    Type: Application
    Filed: July 23, 2018
    Publication date: July 16, 2020
    Inventors: Se-Jin LEE, Seok-Bae PARK, Bong-Hyang LEE, Taejung YU, Yeong-Tae CHOI, Dajung LEE, Seongeun WOO
  • Publication number: 20200195037
    Abstract: Disclosed is a charging apparatus capable of reducing a low-frequency leakage current, the charging apparatus including a duty controller that determines the duty of a switching element in a power factor correction converter on the basis of the level of a common-mode component of an AC voltage of AC power provided from an external charging facility, the level of the DC voltage formed by a DC link capacitor, and a leakage current flowing from the connection node of input-terminal Y-capacitors and the connection node of output-terminal Y-capacitors to the ground.
    Type: Application
    Filed: July 22, 2019
    Publication date: June 18, 2020
    Inventors: Dong Gyun Woo, Gyu Tae Choi, Hui Sung Jang, Hyun Wook Seong
  • Publication number: 20200195129
    Abstract: A charging apparatus may include a power factor correction converter including a switching element, to correct a power factor of AC power provided by external charging equipment through ON/OFF control of the switching element, to convert the corrected power factor into DC power, and to output the DC power; a DC link capacitor connected to both ends of the PFC converter to form a DC voltage; a DC-DC converter converting a magnitude of the DC voltage formed by the DC link capacitor into a magnitude of a voltage required by an energy storage device to be charged; and a duty controller configured to determine a duty of the switching element in the PFC converter based on a magnitude of a common-mode component of an AC voltage of the AC power provided by the external charging equipment and the magnitude of the DC voltage formed by the DC link capacitor.
    Type: Application
    Filed: July 23, 2019
    Publication date: June 18, 2020
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Gyun WOO, Gyu Tae Choi, Hui Sung Jang, Hyun Wook Seong
  • Publication number: 20200186024
    Abstract: A system of controlling a charging apparatus for a vehicle may include a power supply unit supplying an AC power, a power factor correction (PFC) converter unit connected to the power supply unit and converting the AC power supplied from the power supply unit into a DC power and supplying the converted DC power to a load, and a controller extracting a high frequency component from the AC power input to the PFC converter unit, determining a frequency of the extracted high frequency component, and limiting, when the determined frequency is equal to or greater than a predetermined value, output power from the PFC converter unit to a value lower than the predetermined value.
    Type: Application
    Filed: May 23, 2019
    Publication date: June 11, 2020
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Gyu Tae CHOI
  • Patent number: 10551987
    Abstract: Provided are a method and a mobile terminal for simultaneously displaying at least two application windows on a display unit of a mobile terminal. The method may include displaying a first application window associated with a first application on an entire display area of the display unit, receiving a multi_screen mode initiation input from a user, dividing a display area of the display unit into at least two display areas including a first display area and a second display area in response to the multi_screen mode initiation input, and displaying the first application window and a second application window on the at least two display areas, respectively, in a multi_screen mode.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: February 4, 2020
    Assignee: KT CORPORATION
    Inventors: Haeng-Suk Chae, Kyoung-Tae Choi
  • Publication number: 20200033914
    Abstract: A display device includes a flexible substrate, a display element on the flexible substrate and including a thin film transistor, a metal layer disposed at a lower portion of the flexible substrate, and an air layer formed between the flexible substrate and the metal layer.
    Type: Application
    Filed: May 10, 2019
    Publication date: January 30, 2020
    Inventors: Hyo Jung KIM, Tae Young KIM, Jong Woo PARK, Dae Youn CHO, Ki Ju IM, Young Tae CHOI
  • Publication number: 20200020334
    Abstract: An electronic device of the present invention comprises: a housing; a touchscreen display; a microphone; at least one speaker; a button disposed on a portion of the housing or set to be displayed on the touchscreen display; a wireless communication circuit; a processor; and a memory. The electronic device is configured to store an application program including a user interface for receiving a text input. When the user interface is not displayed on the touchscreen display, the electronic device enables a user to receive a user input through the button, receives user speech through the microphone, and then provides data on the user speech to an external server including an automatic speech recognition system and an intelligence system. An instruction for performing a task generated by the intelligence system in response to the user speech is received from the server.
    Type: Application
    Filed: February 1, 2018
    Publication date: January 16, 2020
    Inventors: Sang-Ki KANG, Jang-Seok SEO, Kook-Tae CHOI, Hyun-Woo KANG, Jin-Yeol KIM, Chae-Hwan LI, Kyung-Tae KIM, Dong-Ho JANG, Min-Kyung HWANG
  • Patent number: 10527212
    Abstract: A hydraulic tube connector for a vehicle may include a connector body including a first through-hole into which a tube having a tube protrusion protruding outward is inserted and a sealing O-ring groove which is formed at one side of the first through-hole, a sealing O-ring configured to be coupled to the sealing O-ring groove, and a release sleeve coupled to the connector body to prevent the sealing O-ring from being separated from the sealing O-ring groove.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: January 7, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Eun Sik Kim, Hyung Tae Choi
  • Patent number: 10529461
    Abstract: Disclosed are an organic heterocyclic compound represented by Chemical Formula A and an organic light-emitting diode comprising the same. wherein substituents R1 to R8, X1 to X4, W1, and Y1 are each as defined in the specification.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: January 7, 2020
    Assignee: SFC CO., LTD.
    Inventors: Se-jin Lee, Seok-Bae Park, Taejung Yu, Byung-sun Yang, Yeong-tae Choi
  • Patent number: 10526342
    Abstract: The present invention relates to an organic light-emitting compound represented by Chemical Formula A and an organic light-emitting device. In Chemical Formula A, X, Y, Z, and the substituents R1 to R8, and R11 to R20 are as defined in the specification.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: January 7, 2020
    Assignee: SFC CO., LTD.
    Inventors: Taejung Yu, Yeong-Tae Choi, Bong-Hyang Lee, Byung-Sun Yang, Se-Jin Lee
  • Publication number: 20190392688
    Abstract: Provided are a haptic feedback fiber body, a haptic feedback fabric, and a wearable device. The haptic feedback fiber body can include a core fiber having a first electrode to surround the outer surface thereof; and a vibrating fiber, provided so as to intermittently contact the outer surface of the core fiber, including a second electrode on the inner surface thereof, wherein a piezoelectric polymer is provided on the outer surface of the first electrode or on the inner surface of the second electrode to generate fretting vibrations when the polymer is in close contact with the first electrode or the second electrode on which the piezoelectric polymer is disposed opposite to each other.
    Type: Application
    Filed: January 26, 2018
    Publication date: December 26, 2019
    Inventor: Seung Tae CHOI
  • Publication number: 20190390334
    Abstract: Alignment systems employing actuators provide relative displacement between lid assemblies of process chambers and substrates, and related methods are disclosed. A process chamber includes chamber walls defining a process volume in which a substrate may be placed and the walls support a lid assembly of the process chamber. The lid assembly contains at least one of an energy source and a process gas dispenser. Moreover, an alignment system may include at least one each of a bracket, an interface member, and an actuator. By attaching the bracket to the chamber wall and securing the interface member to the lid assembly, the actuator may communicate with the bracket and the interface member to provide relative displacement between the chamber wall and the lid assembly. In this manner, the lid assembly may be positioned relative to the substrate to improve process uniformity across the substrate within the process chamber.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 26, 2019
    Inventors: Danny D. WANG, Jason Michael LAMB, Jun Tae CHOI, Rupankar CHOUDHURY, Zhong Qiang HUA, Juan Carlos ROCHA-ALVAREZ
  • Publication number: 20190392758
    Abstract: A display device including an emitting element. A first transistor includes a first electrode electrically connected to a first supply voltage line, a second electrode electrically connected to the emitting element, and a gate electrode receiving a data signal, the first transistor being configured to transfer a driving current to the emitting element based on the data signal. A capacitor is connected between the gate electrode of the first transistor and the first supply voltage line. An electric field generating element is connected between the second electrode of the first transistor and the gate electrode of the first transistor and includes ferroelectrics.
    Type: Application
    Filed: March 20, 2019
    Publication date: December 26, 2019
    Inventors: Tae Young Kim, Jong Woo Park, Hyo Jung Kim, Ki Ju Im, Young Tae Choi
  • Publication number: 20190361531
    Abstract: Provided is a haptic feedback button, which includes: a substrate; a lower electrode provided on an upper portion of the substrate, and formed by patterning a ground electrode and a touch sensing electrode; an upper electrode, provided above the lower electrode with an interval from the lower electrode, to which a driving voltage is applied; and a cover provided on an upper portion of the upper electrode, wherein a piezoelectric polymer is provided on an upper portion of the lower electrode or a lower portion of the upper electrode so that fretting vibration may be generated when the piezoelectric polymer is in close contact with the lower electrode or the upper electrode that are disposed to face each other.
    Type: Application
    Filed: January 26, 2018
    Publication date: November 28, 2019
    Inventor: Seung Tae CHOI
  • Publication number: 20190348478
    Abstract: Disclosed herein are a display device, an apparatus for testing a display device, and a method for testing a display device. A display device includes a first substrate having a display area and a non-display area defined thereon, the non-display area being on an outer side of the display area. The non-display area may include a plurality of test pads and a first dummy thin-film transistor electrically connected to the test pads. The first dummy thin-film transistor includes a dummy gate electrode, and a dummy source electrode and a dummy drain electrode insulated from the gate electrode and spaced apart from each other. A bending area is defined on the first substrate that at least partially traverses the display area and the non-display area, the bending area overlaps the first dummy thin-film transistor.
    Type: Application
    Filed: May 6, 2019
    Publication date: November 14, 2019
    Inventors: Hyo Jung KIM, June Hwan KIM, Jong Woo PARK, Dae Guen CHOI, Jae Sik SON, Young Tae CHOI
  • Patent number: 10458037
    Abstract: An exemplary embodiment of the present invention provides a method for anti-wetting metallic surfaces. A metallic object is introduced to an electrochemical solution. A cathode is introduced to the electrochemical solution, and an anode is attached to the metallic object. An electric potential between the cathode and anode is applied, such that selective electrochemical etching of the surface of the metallic object occurs. The selective etching etches grain boundaries at the surface of the metallic object, and the grain boundaries define grain faces.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: October 29, 2019
    Assignee: Georgia Tech Research Corporation
    Inventors: Won Tae Choi, Laurens Victor Breedveld, Dennis W. Hess, Kkochnim Oh, Preet M. Singh