Patents by Inventor Chang-Hun Choi

Chang-Hun 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: 20240136531
    Abstract: A conductive composite material, a method of preparing the same, and a secondary battery including the same. The conductive composite material may increase the proportion of an active material when forming an electrode by chemically bonding a conductive material and a binder to each other. A method of preparing the conductive composite material comprises ionizing carbon-based particles in a predetermined polarity, ionizing PTFE particles in a polarity different from that of the carbon-based particles, and chemically bonding the ionized carbon-based particles and the ionized PTFE particles, which are ionized in different polarities, to each other.
    Type: Application
    Filed: September 20, 2023
    Publication date: April 25, 2024
    Inventors: Seung Min Oh, Sung Ho Ban, Sang Hun Lee, Ko Eun Kim, Yoon Sung Lee, Chang Hoon Song, Hyeong Jun Choi, Jun Myoung Sheem, Jin Kyo Koo, Young Jun Kim
  • Publication number: 20240118196
    Abstract: In the case of a gas in which several gases are mixed, a type and concentration of the gas may be incorrectly measured when measured using only an optical band-pass filter. The invention of the present application is directed to providing a technology in which a plurality of broadband band-pass filters having overlapping regions are provided to calculate a magnitude of absorption for each wavelength band for light passing through each broadband band-pass filter, thereby identifying the presence of a gas of interest and the presence of a gas other than the gas of interest.
    Type: Application
    Filed: September 8, 2023
    Publication date: April 11, 2024
    Inventors: Cheol Woo NAM, Byung Yul MOON, Eung Yul KIM, Jae Hwan KIM, Chun Ho SHIN, Kwang Hun PARK, Myun Gu CHOI, Chang Hwang CHOI, Yong Geol KIM, Jae Min JEON
  • Publication number: 20240109397
    Abstract: A method for controlling an electric heater of a vehicular heating, ventilation, and air conditioning (HVAC) system includes turning on the electric heater; determining whether an ambient air temperature of a vehicle is higher than or equal to a threshold ambient air temperature, and a battery temperature is lower than or equal to a threshold battery temperature; determining whether battery efficiency is lower than or equal to threshold efficiency when the ambient air temperature of the vehicle is higher than or equal to the threshold ambient air temperature, and the battery temperature is lower than or equal to the threshold battery temperature; and turning off the electric heater when the battery efficiency is lower than or equal to the threshold efficiency, wherein the electric heater is configured to receive electric energy from the battery.
    Type: Application
    Filed: March 30, 2023
    Publication date: April 4, 2024
    Inventors: Dae Hyun Song, Chang Gi Ryu, Woo Jin Lee, Dong Ju Ko, Hyun Hun Choi, Chun Kyu Kwon, In Uk Ko
  • Publication number: 20240071690
    Abstract: A multilayer electronic component includes a body including a plurality of dielectric layers and internal electrodes, and an external electrode disposed on the body and connected to the internal electrodes. The body includes an active portion including the plurality of internal electrodes to form capacitance, and cover portions disposed on the active portion, and the cover portions include an outer cover portion including a carbon compound and an inner cover portion disposed between the active portion and the outer cover portion. An average carbon content (Cc2) of the outer cover portion compared to an average carbon content (Cc1) of the inner cover portion satisfies 100?Cc2/Cc1?10,000.
    Type: Application
    Filed: August 14, 2023
    Publication date: February 29, 2024
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Yeop KIM, Jin Il KANG, Ji Hun LEE, Chang Hak CHOI
  • Patent number: 11371231
    Abstract: The present invention relates to a toilet flushing device using a toilet cover. More specifically, the present invention comprises: a sliding means disposed at the front side of a water tank and configured to slide forward/backward by magnetic force to allow a drain valve to operate as soon as a toilet cover is closed; and an operation lever disposed at the rear side of the sliding means so as to open or close the drain valve, wherein the drain valve is operated to flush water by a structure in which the sliding means and the operation lever operate in cooperation in response to an operation of the toilet cover after use of the toilet. Therefore, the present invention can induce the habit of covering the toilet by the toilet cover after using the toilet and thus enhance a sanitary culture.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 28, 2022
    Inventors: Chang Hun Choi, Sun Young Choi
  • Publication number: 20210115654
    Abstract: The present invention relates to a toilet flushing device using a toilet cover. More specifically, the present invention comprises: a sliding means disposed at the front side of a water tank and configured to slide forward/backward by magnetic force to allow a drain valve to operate as soon as a toilet cover is closed; and an operation lever disposed at the rear side of the sliding means so as to open or close the drain valve, wherein the drain valve is operated to flush water by a structure in which the sliding means and the operation lever operate in cooperation in response to an operation of the toilet cover after use of the toilet. Therefore, the present invention can induce the habit of covering the toilet by the toilet cover after using the toilet and thus enhance a sanitary culture.
    Type: Application
    Filed: March 19, 2019
    Publication date: April 22, 2021
    Inventors: Chang Hun CHOI, Sun Young CHOI
  • Publication number: 20020041292
    Abstract: A method of displaying a list of menus on a screen of a mobile telephone is described. Each menu is represented by a menu icon including at least one of a corresponding text and graphical illustration identifying each menu. The method includes the steps of entirely displaying an initial menu icon representing one of the list of menus on the screen, displaying a portion of the initial menu icon and a second portion of an adjacent menu icon on the screen when a telephone user presses down a navigation key or an arrow key in a direction toward the adjacent menu icon, and entirely displaying the adjacent menu icon on the screen. By using the method according to the present invention, an improved user interface of a top or sub menu list display is achieved by displaying the menu list using a scroll technique and by including a numerical and graphical menu indicator indicating the current menu location in a menu tree.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 11, 2002
    Applicant: LG Electronics Inc.
    Inventors: Yong Tae Son, Chang Hun Choi
  • Patent number: 5787293
    Abstract: A computer incorporates therein a control system for efficiently turning on and off a power supply on and off therein to control on-off operations of the computer. In the control system, a power detection signal is derived first based on a power selection signal generated when a power on/off key of the computer is actuated to control the on-off operations of the computer at a signal detector. And then, at a first generator, a first power control signal and a selection control signal are obtained from the derived power detection signal in response to a first mode control signal. Next, a second power control signal is derived from the power detection signal, the selection control signal and a second mode control signal at a second generator.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 28, 1998
    Assignee: Daewoo Telecom Ltd.
    Inventors: Ki-Hong Kim, Jean-Gee Hong, Seong-Sik Ham, Chang-Hun Choi