Patents by Inventor Hyuk Choi

Hyuk 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: 20220267567
    Abstract: The present invention relates to a tetraester-based plasticizer composition characterized in including a product derived from esterification reaction of an isomer mixture of hexanoic acid and a tetraol, wherein the degree of branching of the isomer mixture of hexanoic acid is 2.0 or less. If the plasticizer composition is applied to a resin, plasticization efficiency and absorption rate may be maintained to equal or better levels when compared to a case applying the conventional plasticizer, and mechanical properties, migration resistance, stress migration and loss properties may be markedly improved.
    Type: Application
    Filed: March 31, 2021
    Publication date: August 25, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Kyu Kim, Jeong Ju Moon, Seok Ho Jeong, Woo Hyuk Choi
  • Publication number: 20220262721
    Abstract: A semiconductor device includes; a semiconductor substrate including a first region and a second region, a first interlayer insulating layer on the second region, a capping layer disposed on the first interlayer insulating layer, an upper surface of the capping layer includes a first trench, conductive patterns spaced apart on the capping layer, side surfaces of the conductive patterns are aligned with inner side surfaces of the first trench, and a peripheral separation pattern disposed in the first trench to cover the side surfaces of the conductive patterns. The peripheral separation pattern has a first thickness on the side surfaces of the conductive patterns and a second thickness greater than or equal to the first thickness on a lower surface.
    Type: Application
    Filed: August 17, 2021
    Publication date: August 18, 2022
    Inventors: IN-HYUK CHOI, WONCHUL LEE, JOONHYOUNG YANG
  • Publication number: 20220242814
    Abstract: A method of preparing a raw material mixture by mixing a dicarboxylic acid and a C4-10 mono-alcohol, and obtaining a product mixture including a diester-based material and water by reacting the raw material mixture in the presence of a catalyst. In the first step, at least one among a reactor temperature (Condition A), an alcohol input amount (Condition B), and an inert gas input amount (Condition C) is controlled, and the distinction between a beginning stage of a reaction and an ending stage of the reaction in Conditions A to C above is based on a reaction control point. The reaction control point is a point of time selected at which a conversion rate of the reaction is between 10% and 80%. This method produces a diester-based material with improved reactivity and improved energy expenditure.
    Type: Application
    Filed: September 24, 2020
    Publication date: August 4, 2022
    Inventors: Jeong Ju Moon, Hyun Kyu Kim, Joo Ho Kim, Yun Ki Cho, Seok Ho Jeong, Woo Hyuk Choi
  • Patent number: 11400920
    Abstract: An automated parking system and a method enables a vehicle to autonomously travel to and parks in a vacant parking slot based on communication with a parking infrastructure. In addition, the automated parking system and method for a driverless vehicle is capable of autonomously traveling from a parking slot to a pickup area via communication with the parking infrastructure.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: August 2, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Sung Won Yoon, Jin Hyuk Choi, Kyung Ho Yoo
  • Patent number: 11395561
    Abstract: The present invention relates to an electric grill comprising a purification and circulation system for removing oil mist and smoke and, more particularly, to an electric grill comprising a purification and circulation system for removing oil mist and smoke, wherein: a suction hole and a discharge hole are installed around a grill plate; air containing oil mist, smoke, heat, and smell is suctioned through the suction hole, the suctioned air containing, oil mist, smoke, heat, and smell is introduced into the lower portion of the grill by a suction fan, and comes into contact with water on the upper side of an oil pan containing the water, so as to remove the oil mist, smoke, heat, and smell contained therein, and then the purified air is circulated through the discharge hole installed around the grill plate; a filter is disposed so as to completely remove the oil mist, smoke, heat, and smell; and a Coanda air guide is installed so as to facilitate the contact between the oil mist, smoke, heat, and smell and th
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: July 26, 2022
    Assignee: DAWON E & A CO., LTD.
    Inventor: Seong-Hyuk Choi
  • Publication number: 20220227961
    Abstract: The present invention relates to a plasticizer composition, including a lower alkyl-based citrate and a higher alkyl-based citrate at the same time, as citrate, wherein the ratio of a hybrid type to a non-hybrid type and the ratio of the lower alkyl groups to the higher alkyl groups are controlled so that effects are achieved. When applying the plasticizer composition to a resin, stress resistance and mechanical properties can be maintained at an equal or higher level, the migration and volatile loss properties and the plasticization efficiency can be balanced, and the light resistance and heat resistance can be remarkably improved.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 21, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Kyu KIM, Seok Ho JEONG, Woo Hyuk CHOI, Jeong Ju MOON, Joo Ho KIM
  • Patent number: 11394106
    Abstract: Various embodiments of the present invention relate to an electronic device comprising a wireless communication circuit, and a portable communication device.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: July 19, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Ju Lee, Won Jin Choi, Bong Sup Son, Moon Hyuk Choi, Se Woong Ahn, Su Ho Jin, Jung Hyun Park, Sung Jun Kim, Sung Chul Park, Ji Woo Lee
  • Publication number: 20220220281
    Abstract: The present invention relates to a plasticizer composition, including a lower alkyl-based citrate and a higher alkyl-based citrate at the same time, as citrate, wherein the ratio of a hybrid type to a non-hybrid type and the ratio of the lower alkyl groups to the higher alkyl groups are controlled so that effects are achieved. When applying the plasticizer composition to a resin, stress resistance and mechanical properties can be maintained at an equal or higher level, the migration and volatile loss properties and the plasticization efficiency can be balanced, and the light resistance and heat resistance can be remarkably improved.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 14, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Hyun Kyu KIM, Jeong Ju MOON, Seok Ho JEONG, Woo Hyuk CHOI
  • Patent number: 11378540
    Abstract: An apparatus for measuring a concentration of an analyte in a bio-sample using an electrochemical bio-sensor, includes a connector with a sample cell in which an oxidation/reduction enzyme and an electron transfer mediator are fixed and a working electrode and an counter electrode are provided; a digital-to-analog converter circuit configured to apply a constant DC voltage to start the oxidation/reduction reaction of the analyte, proceed with an electron transfer reaction, and apply a ?-step ladder-type perturbation potential for fluctuating a potential of the sample cell after applying the constant DC voltage; and a microcontroller configured to control the digital-to-analog converter circuit and directly obtain a concentration value of the analyte from a calibration equation using the ?-step ladder-type perturbation potential.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: July 5, 2022
    Assignee: I-SENS, INC.
    Inventors: Geun Sig Cha, Hakhyun Nam, Seok-Won Lee, Sung Hyuk Choi, Youngjea Kang, Myeongho Lee, Ho Dong Park, Sung Pil Cho
  • Publication number: 20220203919
    Abstract: The present disclosure relates to an interior material for a vehicle and a method for molding the interior material for the vehicle, and more specifically the method for molding an interior material for a vehicle according to the present disclosure includes heating a skin inserted into an upper end heater and a lower end heater spaced apart from each other; preforming the heated skin using an upper mold having a mold temperature set to have a set shape and a lower mold having a second mold temperature; and pressing the preformed skin and a core using a 1-1 mold and a 1-2 mold having set mold temperatures.
    Type: Application
    Filed: December 23, 2021
    Publication date: June 30, 2022
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, KBI Dongkook Ind. Co., Ltd.
    Inventors: Jae Hyun An, In Soo Han, Woo Hyun Lim, Kyu Ha Yoo, Dong Il Son, Dong Hyuk Choi, Chang Woo Kang, Chang Bok Park, Wan Gyu Choi
  • Publication number: 20220199035
    Abstract: Embodiments relate to a display device including bonding pads on a display element where data signals for a plurality of columns of pixels are provided to a same bonding pad in a time-divisional manner. Each of the bonding pads is connected to a plurality of demultiplexer circuits for sampling data signals at the bonding pad, storing the data signals, and transferring the sample data signals to corresponding columns of pixels. Each column of pixels includes a plurality of columns of subpixels, and a period during which a demultiplexer circuit samples the bonding pad for a column of subpixels of a first color may at least partially overlap with a period during which the demultiplexer circuit transfers previously sampled data signals to a column of subpixels of a second color.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 23, 2022
    Inventors: Min Hyuk Choi, Wenhao Qiao
  • Publication number: 20220195143
    Abstract: A citrate-based plasticizer composition including a citrate-based composition, and a citrate-based composition including one or more citrates. The citrates are characterized in having an alkyl group derived from an isomer mixture of hexyl alcohol having a degree of branching of 2.0 or less. Stress resistance and mechanical properties can be maintained at values equal or better than conventional plasticizers, the balance between migration and volatile properties and plasticization efficiency can be maintained, and light resistance and heat resistance can be markedly improved by applying the citrate-based plasticizer composition to a resin.
    Type: Application
    Filed: July 29, 2020
    Publication date: June 23, 2022
    Inventors: Hyun Kyu Kim, Seok Ho Jeong, Jeong Ju Moon, Woo Hyuk Choi, Yun Ki Cho, Joo Ho Kim
  • Publication number: 20220185988
    Abstract: The present disclosure relates to a plasticizer composition characterized in having alkyl groups derived from an isomer mixture of hexyl alcohol with the degree of branching of less than 2.0 as a cyclohexane triester. When the plasticizer composition is applied to a resin, stress resistance and mechanical properties may be maintained to equal or better levels, migration and loss properties and plasticization efficiency may keep balance, and light resistance and heat resistance may be markedly improved.
    Type: Application
    Filed: April 29, 2020
    Publication date: June 16, 2022
    Inventors: Hyun Kyu KIM, Jeong Ju MOON, Woo Hyuk CHOI, Joo Ho KIM
  • Patent number: 11362326
    Abstract: An embodiment of the present invention provides a method for preparing a silicon-carbon-graphene composite, comprising the steps of: (step 1) adding a carbon precursor solution to silicon and performing wet grinding so as to prepare a suspension: (step 2) forming a silicon-carbon composite by spray drying the suspension; and (step 3) spray drying and heat treating a solution comprising the silicon-carbon composite and graphene oxide.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: June 14, 2022
    Assignee: Korea Institute of Geoscience and Mineral Resources
    Inventors: Hee-Dong Jang, Han-Kwon Chang, Dae-Sup Kil, Ji-Hyuk Choi, Sun-Kyung Kim
  • Patent number: 11360642
    Abstract: A method for setting a parameter includes the steps of: selecting, by a touch or click, one point on an electronic map displayed on an electronic device; displaying a parameter input area around the selected one point on the electronic map; detecting, by the electronic device, panning or drag performed along a direction in which the displayed parameter input area is formed; adjusting a value of the parameter according to the detected panning or drag; detecting, by the electronic device, panning or drag performed in a direction toward the one point; and setting the parameter to the adjusted value, wherein the touch or click is maintained while the steps of setting the one point through setting the parameter is performed.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: June 14, 2022
    Assignee: Hanwha Techin Co., Ltd.
    Inventors: Kyoung Jeon Jeong, Sung Pil Chun, Jin Hyuk Choi
  • Patent number: 11362224
    Abstract: Disclosed is a photodetector in which a plurality of conductive stripes spaced apart from each other are bonded onto a two-dimensional semiconductor thin-film, and a pitch between adjacent conductive stripes is controlled to selectively adjust a plasmonic resonance wavelength zone, such that the photodetector has a high absorbance and a wide detection zone at the same time. Further, a manufacturing method thereof is disclosed. The photodetector includes a semiconductor thin-film; and a plurality of conductive stripes bonded onto the semiconductor thin-film and extending in a parallel manner to each other and spaced apart from each other.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: June 14, 2022
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Sung Joo Lee, Jae Ho Jeon, Seung Hyuk Choi, Jin Hong Park
  • Patent number: 11362282
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 14, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Hye-Su Ji, Han-Kook Oh, Yun-Ji Lee, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi
  • Publication number: 20220177672
    Abstract: A plasticizer composition including a citrate-based material and an epoxidized oil, and the plasticizer composition capable of maintaining an excellent plasticization efficiency and providing an improved mechanical properties and stress resistance when compared with conventional phthalate-based plasticizer products.
    Type: Application
    Filed: June 11, 2020
    Publication date: June 9, 2022
    Inventors: Hyun Kyu Kim, Seok Ho Jeong, Jeong Ju Moon, Woo Hyuk Choi
  • Patent number: 11355043
    Abstract: Embodiments relate to a display device including pixels arranged in rows and columns, where duty cycles of the pixels are dynamically programmed according to eye tracking information. For a display frame, the display device may determine a gaze region and a non-gaze region based on the eye tracking information. A control circuit of the display device controls a first subset of pixels in the gaze region to operate with a first duty cycle and controls a second subset of pixels in the non-gaze region to operate with a second duty cycle greater than the first duty cycle. The first subset of pixels emits light with greater brightness than the second subset of pixels.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: June 7, 2022
    Assignee: Facebook Technologies, LLC
    Inventors: Min Hyuk Choi, Wenhao Qiao, Donghee Nam, Wonjae Choi, Zhiming Zhuang
  • Publication number: 20220162421
    Abstract: The present disclosure relates to a plasticizer composition characterized in including two or more isophthalates of the same carbon number type, in which alkyl groups bonded to two ester groups have the same carbon number; one or more isophthalates of a different carbon number type, in which alkyl groups bonded to two ester groups have different carbon numbers; wherein the different carbon number type includes both a higher alkyl and a lower alkyl, the carbon number of the higher alkyl is 8 to 10, and the carbon number of the lower alkyl is selected from 5 to 7, thereby, when applied to a resin, showing improved viscosity stability, migration resistance and stress resistance, while maintaining and improving plasticization efficiency and mechanical properties to the same or better level.
    Type: Application
    Filed: April 28, 2020
    Publication date: May 26, 2022
    Inventors: Hyun Kyu KIM, Yun Ki CHO, Jeong Ju MOON, Joo Ho KIM, Seok Ho JEONG, Woo Hyuk CHOI