Patents by Inventor Chul Choi

Chul 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: 20230191340
    Abstract: The disclosure relates to superhydrophobic membranes and methods of making and using such membranes. Polydimethylsiloxane (PDMS) substrate is formed on sandpaper such that the PDMS substrate has a surface texture replicating the opposite impression of the sandpaper texture. Separately, a PVDF solution is prepared and disposed on the PDMS substrate. The PVDF substrate and liquid film combination are transferred to a solution of deionized water mixed with 2-propanol to form a PVDF film on the PDMS substrate. The PVDF film-PDMS substrate is transferred to a second DI water bath, after which the PVDF film is detached from the PDMS substrate. The PVDF film is then washed and dried, to yield a superhydrophobic PVDF membrane having the texture of sandpaper.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 22, 2023
    Inventors: Turki Nabieh Baroud, Hasan Al Abdulgader, Young Chul Choi, Umair Baig, Mohammed Abdul Azeem
  • Publication number: 20230191339
    Abstract: The disclosure relates to superhydrophobic membranes and methods of making and using such membranes. Polydimethylsiloxane (PDMS) substrate is formed on sandpaper such that the PDMS substrate has a surface texture replicating the opposite impression of the sandpaper texture. Separately, a PVDF solution is prepared and disposed on the PDMS substrate. The PVDF substrate and liquid film combination are transferred to a solution of deionized water mixed with 2-propanol to form a PVDF film on the PDMS substrate. The PVDF film-PDMS substrate is transferred to a second DI water bath, after which the PVDF film is detached from the PDMS substrate. The PVDF film is then washed and dried, to yield a superhydrophobic PVDF membrane having the texture of sandpaper.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 22, 2023
    Inventors: Turki Nabieh Baroud, Mohammed Abdul Azeem, Dahiru Umar Lawal, Hasan Al Abdulgader, Young Chul Choi
  • Patent number: 11681198
    Abstract: In the electrochromic device according to an embodiment of the present application, when the first voltage is applied to the electrochromic device in a state that the electrochromic element has the first state, the electrochromic device becomes the second state, and when the first voltage is applied to the electrochromic element in a state that the electrochromic element has the fourth state, the electrochromic element becomes the third state.
    Type: Grant
    Filed: October 22, 2021
    Date of Patent: June 20, 2023
    Assignee: LeapHigh Inc.
    Inventors: Sang Hyun Park, Byoung Dong Kim, Hyun Jong Kim, Cheol Hwan Kim, Sang Woo Yoo, Yun Chul Choi, Sung Joong Kim, Kwang Jin Jeon, Hyeon Jun Kong, Jin Ah Sohn
  • Patent number: 11683502
    Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: June 20, 2023
    Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, University-Industry Cooperation Group of Kyung Hee University
    Inventors: Hae Chul Choi, Se Yoon Jeong, Sung-Chang Lim, Jin Soo Choi, Jin Woo Hong, Dong Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Gwang Hoon Park, Seung Ryong Kook, Sea-Nae Park, Kwang-Su Jeong
  • Publication number: 20230183094
    Abstract: A system an oil-water separation system including a vessel for receiving an oil-water mixture and passing a treated water having a lower concentration of oil than the oil-water mixture. The system further includes a first overflow baffle for directing the oil-water mixture fluid flow over the first overflow baffle, and a first underflow baffle positioned downstream along a fluid flow pathway of the first overflow baffle for directing the oil-water mixture fluid flow under the first underflow baffle, and a second overflow baffle positioned downstream along the fluid flow pathway of the first underflow baffle having a mesh with a plurality of perforations which directs fluid flow over the second overflow baffle and through the plurality of perforations. The second overflow baffle permits a water portion of the oil-water mixture to traverse through the mesh and an oil portion of the oil-water mixture to traverse over the mesh.
    Type: Application
    Filed: December 10, 2021
    Publication date: June 15, 2023
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Fahd Ibrahim Alghunaimi, Young Chul Choi, Olanrewaju M. Oshinowo, Hasan A. Al Abdulgader
  • Patent number: 11678560
    Abstract: A display device includes a substrate including a display area having first color subpixels and a transparent area inside the display area, an array layer in the display area on the substrate, a first electrode in the first color subpixels on the array layer, a first emission assisting layer on the first electrode, an emitting material layer in the first color subpixels on the first emission assisting layer, a second emission assisting layer on the emitting material layer, a deposition preventing layer in the transparent area on the second emission assisting layer, a second electrode on the second emission assisting layer, the second electrode selectively disposed in a region where the deposition preventing layer is not disposed, an encapsulating layer on the deposition preventing layer and the second electrode, a polarizing layer in the display area on the encapsulating layer, an auxiliary equipment in the transparent area under the substrate.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: June 13, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Young-Nam Lim, Hyun-Chul Choi, Kwan-Soo Kim, Seok-Hyun Kim, Jae-Hyeon Kim
  • Patent number: 11669179
    Abstract: A display device includes a panel part including a bending area, a digitizer disposed under the panel part, a first magnetic member disposed under the digitizer, and a second magnetic member disposed under the first magnetic member. The first magnetic member includes a first portion and a second portion, which are spaced apart from each other by a dividing area at least partially overlapping the bending area. The second magnetic member at least partially overlaps the dividing area.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: June 6, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jaiku Shin, Sojeong La, Sung Chul Choi
  • Patent number: 11671603
    Abstract: Disclosed herein is a method of decoding an image. The method includes determining a prediction mode of a current block as a merge mode with motion vector difference (MMVD), deriving a merge candidate list of the current block, deriving a motion vector predictor of the current block using the merge candidate list, deriving a motion vector difference of the current block, and deriving a motion vector of the current block using the motion vector predictor and the motion vector difference. Only some of candidates in the merge candidate list are used to derive the motion vector predictor.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: June 6, 2023
    Assignees: Electronics Telecommunications Research Institute, HANBAT NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Ha Hyun Lee, Jung Won Kang, Sung Chang Lim, Jin Ho Lee, Hui Yong Kim, Hae Chul Choi, Dae Hyeok Gwon, Jae Ryun Choi
  • Patent number: 11659159
    Abstract: Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: May 23, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang Lim, Jong Ho Kim, Hae Chul Choi, Hui Yong Kim, Ha Hyun Lee, Jin Ho Lee, Se Yoon Jeong, Suk Hee Cho, Jin Soo Choi, Jin Woo Hong, Jin Woong Kim
  • Patent number: 11656656
    Abstract: A display device includes a display panel including a rear surface and a front surface, where the front surface is provided with a display surface and including a folding axis extending in a first direction, a first barrier member disposed on the rear surface of the display panel and having a modulus of about 1 GPa to about 300 GPa, a first coupling member disposed on a rear surface of the first barrier member, and a metal plate disposed on a rear surface of the first coupling member and including a first plate portion and a second plate portion which are arranged in a second direction crossing the first direction and a connection portion connecting the first plate portion and the second plate portion, where the first coupling member does not overlap the connection portion in a plan view.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jai Ku Shin, Dong Jin Park, Dong Woo Seo, Sung Chul Choi
  • Patent number: 11656655
    Abstract: A display device includes a display panel including a first non-folding area, a folding area, and a second non-folding area that are arranged in a first direction, a first support layer which is disposed below the display panel and in which a plurality of first holes overlapping the first non-folding area and the second non-folding area are defined, and a reinforcing part disposed below the first support layer. The reinforcing part includes a reinforcing layer disposed below the first support layer and a plurality of dummies extending from the reinforcing layer and disposed into the plurality of first holes.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jaiku Shin, Yunjae Kim, Sung Chul Choi
  • Patent number: 11658507
    Abstract: A battery charging method and an electronic device are disclosed. The electronic device can comprise: a connection unit comprising a first terminal to which a voltage is applied by an external device, and a second terminal for transmitting/receiving data; a first charging unit for charging a battery connected to the electronic device by using the voltage applied to the first terminal; and a second charging unit for charging the battery by dropping the voltage applied to the first terminal according to a preset voltage drop rate.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 23, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Geun Yoon, Kang-Jun Ko, Chul-Woo Park, Ku-Chul Jung, Seung-Chul Choi
  • Patent number: 11655409
    Abstract: A system and method for generating water concentrated in calcium bromide from produced water, to provide for drilling fluid having the calcium bromide. The technique includes flowing the produced water through a bed of ion-exchange resin to sorb bromide ions from the produced water onto the ion-exchange resin, and then regenerating the ion-exchange resin to desorb the bromide ions for combination with calcium ions to acquire an aqueous solution with calcium and bromide.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: May 23, 2023
    Assignee: Saudi Arabian Oil Company
    Inventors: Fahd Ibrahim AlGhunaimi, Young Chul Choi, Regis Didier Alain Vilagines, Khalid A. Al-Harbi
  • Publication number: 20230156930
    Abstract: A display device includes a display panel and a lower member disposed below the display panel. The display panel includes a first non-folding region, a second non-folding region, and a folding region disposed between the first non-folding region and the second non-folding region. The lower member includes a support layer and a digitizer. The support layer comprises a first support part disposed below the first non-folding region, and having insulating property, and a second support part disposed below the second non-folding region and having insulating property. The digitizer is disposed below the first support part and the second support part.
    Type: Application
    Filed: January 18, 2023
    Publication date: May 18, 2023
    Applicant: Samsung Display Co., Ltd.
    Inventors: JAIKU SHIN, SUNG CHUL CHOI
  • Patent number: 11653520
    Abstract: A display device includes a display module including a first non-folding area, a second non-folding area, and a folding area disposed between the first and second non-folding areas which are arranged in a first direction, a first support disposed below the first non-folding area, a second support disposed below the second non-folding area, and a hinge including a biaxial rotation shaft disposed between the first support and the second support, the biaxial rotation shaft extending in a second direction intersecting the first direction. The folding area has a curvature radius in a range of about 1.5 mm to about 5.0 mm when the display module is folded by a rotation of the first support and the second support with respect to the biaxial rotation shaft.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: May 16, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Yong Sim, Sung Chul Choi, In Soo Park, Dongwoo Seo
  • Patent number: 11651960
    Abstract: The present invention relates to a method for forming an amorphous silicon thin film, a method for manufacturing a semiconductor device including the same, and a semiconductor device manufactured thereby. The present invention discloses a method for forming an amorphous silicon thin film, wherein the method includes a first step (S10) of providing a first gas containing silicon and a second gas containing nitrogen on a substrate (100) to form a first amorphous silicon layer (310b), and a second step (S20) of providing a first gas containing silicon on the substrate (100) having the first amorphous silicon layer (310b) formed thereon to form a second amorphous silicon layer (300a).
    Type: Grant
    Filed: June 17, 2021
    Date of Patent: May 16, 2023
    Assignee: WONIK IPS CO., LTD.
    Inventors: Jae Jung Moon, Young Chul Choi, Dong Hak Kim
  • Patent number: 11644768
    Abstract: An example operation method of an image forming apparatus includes determining a state of a toner refill operation of injecting toner from a toner reload kit (TRK) into a cartridge in the image forming apparatus, based on completion of injecting toner from the TRK into the cartridge, controlling the TRK to store information indicating a toner refill completion in a memory of the TRK, based on completion of injecting toner from the TRK into the cartridge, updating information of an amount of remaining toner of the cartridge based on an amount of the toner injected into the cartridge from the TRK, and based on the information indicating the toner refill completion being stored in the memory of the TRK, unlocking a locking apparatus in the image forming apparatus so the TRK may be removed from the cartridge.
    Type: Grant
    Filed: October 11, 2022
    Date of Patent: May 9, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hong-Chul Choi, Yun-Su Kim, Seong-ho Jin, Jinwoo Noh
  • Publication number: 20230107166
    Abstract: The present disclosure relates to a heterocyclic compound being represented by Formula, an organic light emitting device including the heterocyclic compound and an organic light emitting display device including the organic light emitting device. The organic heterocyclic is included in an organic material layer of the organic light emitting device.
    Type: Application
    Filed: April 14, 2022
    Publication date: April 6, 2023
    Applicants: LG DISPLAY CO., LTD., LT Materials Co., Ltd.
    Inventors: Sang-Beom KIM, Young-Jun YU, Seon-Keun YOO, Seung-Kwang ROH, Woo-Chul CHOI, Ji-Ho BAEK, Kyung-Hoon LEE, Ki-Min LIM, Dong-Jun KIM, Young-Seok NO, Hyun-Joo LEE, Eui-Jeong CHOI
  • Patent number: 11620722
    Abstract: The present invention prevents an error of a blockchain-based smart contract and an error occurring in a process of cooperating with a conventional smart contract and uses a smart contract template, thereby enhancing convenience in writing a smart contract.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: April 4, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Yun Chul Choi
  • Publication number: 20230099375
    Abstract: A massive multiple-input multiple-output (MIMO) antenna apparatus and a heat dissipation device therefor are disclosed. The present disclosure according to at least one embodiment provides a massive MIMO antenna apparatus including a board, a first blowing unit, and a second blowing unit. The board has at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, has a width and a length longer than the width, and includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board.
    Type: Application
    Filed: December 5, 2022
    Publication date: March 30, 2023
    Applicant: KMW INC.
    Inventors: Duk Yong KIM, Kyo Sung JI, Chi Back RYU, Kyu Chul CHOI, Hye Yeon KIM, In Hwa CHOI, Jae Ho JANG, Jae Hyun PARK, Youn Jun CHO, Jeong Hyun CHOI