Patents by Inventor Yeon Sik Choi

Yeon Sik 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: 12106794
    Abstract: A memory device includes a clock receiver configured to receive, from a memory controller, a write clock that is used to receive write data during a data write operation, a duty monitor configured to generate first monitoring information by monitoring a duty of the write clock, and a duty adjuster configured to adjust the duty of the write clock in response to a duty control signal and output an adjusted write clock. The memory device provides the first monitoring information to the memory controller, and receives the duty control signal, generated using the first monitoring information, from the memory controller.
    Type: Grant
    Filed: June 7, 2023
    Date of Patent: October 1, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Dae-Sik Moon, Gil-Hoon Cha, Ki-Seok Oh, Chang-Kyo Lee, Yeon-Kyu Choi, Jung-Hwan Choi, Kyung-Soo Ha, Seok-Hun Hyun
  • Patent number: 12044643
    Abstract: A sensor tube according to the present disclosure includes a body including a body extension having opposite ends connected to measurement air connection pipes and an opening, the measurement air connecting pipes being connected to a humidity sensor to deliver moisture to the humidity sensor using measurement air or allow the measurement air released from the humidity sensor to flow therethrough, and the opening being formed in the body extension to cause an interior space of the body extension and the outside to be in communication with each other such that the moisture is introduced into the interior space of the body extension from the outside through the opening, and an opening/closing part that selectively opens or closes the opening by being operated by a difference in pressure between the interior space of the body extension and the outside.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: July 23, 2024
    Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Yeon Sik Kim, Tae Soon Kwon, Dong Jin Euh, Hae Seob Choi, Woo Shik Kim
  • Patent number: 10676595
    Abstract: Disclosed are methods for combining a thermoplastic polymer with a carbon nanomaterial. More particularly, A method of preparing a thermoplastic polymer combined with a carbon nanomaterial includes combining the carbon nanomaterial with a pyrene derivative by stirring 1 to 40 wt % of a carbon nanomaterial, 1 to 40 wt % of a polycyclic aromatic hydrocarbon derivative, and 20 to 98 wt % of a solvent with a mechanical mixer. According to the present invention, the resulting materials exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: June 9, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Publication number: 20190177509
    Abstract: Disclosed are methods for combining a thermoplastic polymer with a carbon nanomaterial. More particularly, A method of preparing a thermoplastic polymer combined with a carbon nanomaterial includes combining the carbon nanomaterial with a pyrene derivative by stirring 1 to 40 wt % of a carbon nanomaterial, 1 to 40 wt % of a polycyclic aromatic hydrocarbon derivative, and 20 to 98 wt % of a solvent with a mechanical mixer. According to the present invention, the resulting materials exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 10266675
    Abstract: Disclosed are a thermoplastic polymer combined with a carbon nanomaterial and a method of preparing the same. More particularly, a thermoplastic polymer combined with carbon nanomaterial, comprising 0.1 to 15 wt % of a carbon nanomaterial, 0.025 to 30 wt % of a polycyclic aromatic hydrocarbon derivative, and 55 to 99.875 wt % of a thermoplastic polymer, wherein the carbon nanomaterial and the polycyclic aromatic hydrocarbon derivative combine through ?-? interaction, and the polycyclic aromatic hydrocarbon derivative covalently combines with the thermoplastic polymer, is disclosed. The thermoplastic polymer combined with the carbon nanomaterial and the method of preparing the same, according to the present invention, exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 23, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 9932494
    Abstract: Disclosed are a resin composition and a molded product obtained using the same. By using the resin composition according to the present invention, a molded product having excellent tensile strength, tensile modulus, electromagnetic shielding effects, anti-static effects, and the like may be provided.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 3, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Patent number: 9840609
    Abstract: Provided is a thermoplastic resin composition for a radar cover which exhibits excellent mechanical properties as well as a good balance between electromagnetic reflection loss and electromagnetic penetration loss, which is required for a radar protection, by including 85 wt % to 95 wt % of a thermoplastic resin, 1 wt % to 5 wt % of carbon nanotubes, and 3 wt % to 10 wt % of carbon black, wherein a weight ratio of the carbon nanotubes to the carbon black is in a range of 3:7 to 1:7.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: December 12, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Su Min Lee, Yeon Sik Choi, Gi Dae Choi, Chang Hun Yun
  • Publication number: 20160355670
    Abstract: Provided is a thermoplastic resin composition for a radar cover which exhibits excellent mechanical properties as well as a good balance between electromagnetic reflection loss and electromagnetic penetration loss, which is required for a radar protection, by including 85 wt % to 95 wt % of a thermoplastic resin, 1 wt % to 5 wt % of carbon nanotubes, and 3 wt % to 10 wt % of carbon black, wherein a weight ratio of the carbon nanotubes to the carbon black is in a range of 3:7 to 1:7.
    Type: Application
    Filed: December 5, 2014
    Publication date: December 8, 2016
    Inventors: Su Min LEE, Yeon Sik CHOI, Gi Dae CHOI, Chang Hun YUN
  • Publication number: 20160276055
    Abstract: Provided is a composite produced by processing a resin composition including a thermoplastic resin, carbon nanotubes, and a carbonaceous conductive additive. The carbon nanotubes have an ID/IG of 1.0 or less before the processing. The ratio of residual length of the carbon nanotubes present in the composite is from 40% to 99%. The composite has improved conductivity without deterioration of mechanical properties. Due to these advantages, the composite can be used to manufacture various molded articles.
    Type: Application
    Filed: December 4, 2014
    Publication date: September 22, 2016
    Inventors: Yeon Sik CHOI, Su Min LEE, Gi Dae CHOI, ChangHun YUN
  • Publication number: 20160263840
    Abstract: Provided is a composite produced by processing a resin composition including a thermoplastic resin, bundle type carbon nanotubes and a reinforcing material. The carbon nanotubes have an ID/IG of 1.0 to 1.0 before the processing. The ratio of residual length of the carbon nanotubes present in the composite is from 40% to 99%. The composite has improved mechanical properties without deterioration of conductivity. With these improvements, the composite can be used to manufacture various molded articles.
    Type: Application
    Filed: December 4, 2014
    Publication date: September 15, 2016
    Inventors: Yeon Sik Choi, Su Min Lee, Gi Dae Choi, Changhun Yun
  • Publication number: 20160211049
    Abstract: Provided is a composite produced by processing a resin composition including a thermoplastic resin and carbon nanotubes. The carbon nanotubes have an ID/IG of 0.01 to 1.0 and the rate of residual length of the carbon nanotubes present in the composite is from 1% to 50%. The composite has the advantage of high conductivity. Due to this advantage, the composite can be used to manufacture various molded articles where conductivity is required.
    Type: Application
    Filed: February 6, 2014
    Publication date: July 21, 2016
    Inventors: Yeon Sik CHOI, Su Min LEE, Gi Dae CHOI, ChangHun YUN
  • Publication number: 20160046794
    Abstract: Disclosed are a thermoplastic polymer combined with a carbon nanomaterial and a method of preparing the same. More particularly, a thermoplastic polymer combined with carbon nanomaterial, comprising 0.1 to 15 wt % of a carbon nanomaterial, 0.025 to 30 wt % of a polycyclic aromatic hydrocarbon derivative, and 55 to 99.875 wt % of a thermoplastic polymer, wherein the carbon nanomaterial and the polycyclic aromatic hydrocarbon derivative combine through ?-? interaction, and the polycyclic aromatic hydrocarbon derivative covalently combines with the thermoplastic polymer, is disclosed. The thermoplastic polymer combined with the carbon nanomaterial and the method of preparing the same, according to the present invention, exhibit excellent tensile strength, tensile modulus, electromagnetic shielding effects and anti-static effects, and the like.
    Type: Application
    Filed: August 28, 2014
    Publication date: February 18, 2016
    Inventors: Yeon Sik Choi, Su Min Lee, Chang Hun Yun, Gi Dae Choi
  • Publication number: 20160032144
    Abstract: Disclosed are a resin composition and a molded product obtained using the same. By using the resin composition according to the present invention, a molded product having excellent tensile strength, tensile modulus, electromagnetic shielding effects, anti-static effects, and the like may be provided.
    Type: Application
    Filed: August 28, 2014
    Publication date: February 4, 2016
    Inventors: Yeon Sik CHOI, Su Min LEE, Chang-Hun YUN, Gi Dae CHOI
  • Patent number: 8984691
    Abstract: A laundry machine and a control method thereof are disclosed. The disclosed laundry machine includes a drum rotatably installed in a cabinet, a substance supply device for supplying moisture to the drum, a water supply device separably mounted to the cabinet, to supply water to the substance supply device, a sensor for sensing whether or not water is supplied to the water supply device, and a controller for controlling the substance supply device in accordance with a sensing signal from the sensor.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: March 24, 2015
    Assignee: LG Electronics Inc.
    Inventors: Sang Hun Bae, Dong Geun Lee, Yeon Sik Choi, Ju Han Yoon
  • Patent number: 8904670
    Abstract: A laundry machine, particularly, a dryer using steam is disclosed. The laundry machine such as a washing machine, a dryer, a drying and washing machine is an apparatus which washes or dries articles such as clothes. The dryer includes a drum adapted to accommodate articles to be dried, a control panel adapted to provide an interface with a user, and a controller, wherein the control panel includes a course selection part which allows a user to select a specific course as an operation course during a steam course, which includes a steam process for supplying steam into a drum, such that the dried articles have a moisture content equal to or larger than 6%, and the controller controls an operation of the dryer to perform the selected operation course.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: December 9, 2014
    Assignee: LG Electronics Inc.
    Inventors: Chang Woo Son, Sang Hun Bae, Seon Il Heo, Yeon Sik Choi, Sang Jin Kim, Ju Han Yoon
  • Patent number: 8689462
    Abstract: The present invention relates to a steam laundry drier, and more specifically to a steam laundry dryer capable of removing or preventing crease or wrinkle occurring in cloth, etc. and capable of improving assembling efficiency by easily mounting a steam generator provided to remove the crease or the wrinkle and a water supply source supplying water to the steam generator in the inside of the steam laundry drier.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: April 8, 2014
    Assignee: LG Electronics Inc.
    Inventors: Sang Hun Bae, Dong Geun Lee, Seon Il Heo, Yeon Sik Choi, Ju Han Yoon
  • Patent number: 8607473
    Abstract: Disclosed are a door for a dryer and a dryer having the same, the door for the dryer having a concave portion or an inclined portion formed at an end surface of a door glass, such that an inner volume of the dryer can be enlarged without increasing the size of the dryer, under consideration of the dryer having the same capacity, resulting in allowing a large quantity of clothes to be dried at once.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: December 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Yeon-Sik Choi, Ju-Han Yoon
  • Patent number: 8567219
    Abstract: The present invention relates to a washing machine, and the washing machine includes a drum rotatably installed in a cabinet, an air heater for heating air, to supply hot air to the drum, a steam generator for generating steam, and supply the steam to the drum, and a water supply unit including a nozzle for spraying the steam generated by the steam generator to an interior of the drum, and a nozzle holder having a coupler at a rear surface of the nozzle holder, to separably mount the nozzle at a position adjacent to the drum.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: October 29, 2013
    Assignee: LG Electronics Inc.
    Inventors: Yeon Sik Choi, Chang Woo Son, Dong Geun Lee, Dong Hyun Kim, Heung Jae Kim, Ju Han Yoon, Young Bok Son, Sang Hun Bae, Chul Jin Choi
  • Patent number: 8564181
    Abstract: A multilayered electroactive polymer (EAP) device and a method of manufacturing the same is provided. The multilayered EAP device includes a plurality of unit layers. Each unit layer includes an EAP layer formed of an electroactive polymer (EAP), a protecting layer configured to prevent a material from penetrating into the EAP layer, and an active electrode formed using a conductive material. The protecting layer may be formed below the active layer or above the active layer. The active electrode may be interposed between two protecting layers.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: October 22, 2013
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Seung-Tae Choi, Jong-Oh Kwon, Youn-Jung Park, Cheol-Min Park, Yeon-Sik Choi
  • Patent number: 8256136
    Abstract: A laundry treating apparatus, particularly, a laundry treating apparatus using steam is disclosed. The laundry treating apparatus such as a washing machine, a dryer, a drying and washing machine is an apparatus which washes or dries articles such as clothes. The laundry treating apparatus includes an operation course including a drying process in which hot air is supplied into a drum adapted to accommodate articles to dry the articles and a cooling process in which cool air is supplied into the drum to cool the articles, wherein the operation course further includes a steam process in which steam is supplied into the drum, and the laundry treating apparatus includes a controller which controls a heater adapted to generate the steam such that an operation time point of the heater varies according to an amount of the articles.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: September 4, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sang Hun Bae, Dong Geun Lee, Yeon Sik Choi, Ju Han Yoon