Patents by Inventor Chang-sik Choi

Chang-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: 12163204
    Abstract: A method for producing an aqueous solution containing nickel, cobalt and manganese, includes: a leaching process including a pressure-leaching process of leaching a raw material under pressure to form a leachate containing nickel, cobalt, manganese and impurities; an impurity removal process of removing the impurities from the leachate; a target substance precipitation process of precipitating a mixed hydroxide precipitate containing nickel, cobalt and manganese by introducing a neutralizing agent into a filtrate from which the impurities are removed; and a dissolution process. The pressure-leaching process includes a first-stage pressure-leaching process and a second-stage pressure-leaching process of pressure-leaching a residue of the first-stage pressure-leaching process with an acidity higher than an acidity in the first-stage pressure-leaching process.
    Type: Grant
    Filed: September 22, 2023
    Date of Patent: December 10, 2024
    Assignees: KOREA ZINC CO., LTD., KEMCO
    Inventors: Heon Sik Choi, Yun Birm Choi, Chang Young Choi, James Soung Choi
  • Patent number: 12160845
    Abstract: A vehicle-enabled user equipment (VUE) and related techniques are disclosed. In one aspect, the VUE issues a periodic broadcast, or signals a response to a requesting source, identifying its location management capability (LMC). The UE forms a link with a recipient VUE of the broadcast to perform joint localization of the pedestrian UE (PUE). Joint localization by VUE and another VUE may be performed by VUEs and PUEs in the region exchanging ranging signals and ego measurements. The VUE determines a location jointly of the PUE. The location can be determined upon a request, periodically, or in response to a triggered event.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: December 3, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Kapil Gulati, Chang-Sik Choi
  • Patent number: 12133192
    Abstract: Systems, methods, and devices for sidelink positioning determination and communication can employ techniques including obtaining, at a first sidelink-enabled device, data from one or more data sources indicative of one or more criteria for using either round-trip time (RTT)-based positioning of a target node or single-sided (SS)-based positioning of the target node. The techniques also include selecting, with the first sidelink-enabled device, a positioning type from the group may comprise of RTT-based positioning and SS-based positioning, based on the data. The techniques also include sending a message from the first sidelink-enabled device to a second sidelink-enabled device, where the message includes information indicative of the selected positioning type.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: October 29, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel
  • Patent number: 12127158
    Abstract: Disclosed are some examples of techniques for positioning of a user equipment (UE) using positioning reference signal (PRS). One or more units of messages may be communicated between an initiator UE and a responder UE. A unit of message may include a pre-PRS message, a PRS message and a post-PRS message. The pre-PRS message and the post-PRS message may be sent or received using a license spectrum. The PRS message may be sent or received using an unlicensed spectrum. The communication between the initiator UE and the responder UE may be initiated by the initiator UE identifying the responder UE from a plurality of UEs based on positioning properties of the responder UE. The positioning properties of the responder UE may include one or more of a direction, a velocity, a location confidence and a location of the responder UE.
    Type: Grant
    Filed: November 21, 2022
    Date of Patent: October 22, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Patent number: 12127452
    Abstract: A display device is provided. The display device includes a substrate, a first electrode, a second electrode, and third electrode spaced apart from each other in a first direction on the substrate, a repair line spaced apart from the first to third electrodes in the first direction on the substrate, a repair connection portion connecting the third electrode and the repair line, and light emitting elements on respective ones of the first to third electrodes and spaced apart from each other.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: October 22, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hoon Kim, Chang Hyeok Choi, Yong Sik Hwang
  • 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
  • Publication number: 20240322267
    Abstract: A slave battery management system (BMS) for communicating with a master battery management system (BMS) of a vehicle, in one example includes a power supply configured to receive power from a battery module and transmit the received power, a state measurement sensor configured to measure state information of at least one of a voltage and a temperature of the battery module, a communicator configured to transmit and receive communication signal to and from the master BMS, and a controller programmed to control an on/off time of the communicator. Further, the power supply of the slave BMS includes a power supply unit and a switching unit disposed between the power supply unit and the controller.
    Type: Application
    Filed: June 5, 2024
    Publication date: September 26, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Chang-Hyun SUNG, Jae-Dong PARK, Sang-Hoon LEE, Yean-Sik CHOI
  • Publication number: 20240251475
    Abstract: In a particular implementation, a method of wireless communication includes transmitting, from a first user equipment (UE) to a second UE, a radio resource control (RRC) request that includes a first discontinuous reception (DRX) preference at the first UE. The method also includes receiving, at the first UE from the second UE, a RRC setup message that includes a second DRX preference at the second UE. The method further includes transmitting, from the first UE to the second UE, a RRC setup complete message that includes an indication of a confirmed DRX cycle.
    Type: Application
    Filed: February 2, 2024
    Publication date: July 25, 2024
    Inventors: Anantharaman BALASUBRAMANIAN, Sudhir Kumar BAGHEL, Shuanshuan WU, Gabi SARKIS, Tien Viet NGUYEN, Kapil GULATI, Chang-Sik CHOI
  • Publication number: 20240240279
    Abstract: A method for producing an aqueous solution containing nickel, cobalt and manganese, includes: a leaching process including a pressure-leaching process of leaching a raw material under pressure to form a leachate containing nickel, cobalt, manganese and impurities; an impurity removal process of removing the impurities from the leachate; a target substance precipitation process of precipitating a mixed hydroxide precipitate containing nickel, cobalt and manganese by introducing a neutralizing agent into a filtrate from which the impurities are removed; and a dissolution process. The pressure-leaching process includes a first-stage pressure-leaching process and a second-stage pressure-leaching process of pressure-leaching a residue of the first-stage pressure-leaching process with an acidity higher than an acidity in the first-stage pressure-leaching process.
    Type: Application
    Filed: September 22, 2023
    Publication date: July 18, 2024
    Inventors: Heon Sik CHOI, Yun Birm CHOI, Chang Young CHOI, James Soung CHOI
  • Patent number: 11991109
    Abstract: In an aspect, an initiator transmits a positioning reference signal. The initiator receives a plurality of responder positioning reference signals sent from individual responders of a plurality of responders. The initiator transmits a measurement message comprising a first set of measurements that are determined based on the positioning reference signal and the plurality of responder positioning reference signals. The initiator receives responder measurement messages sent from the individual responders of the plurality of responders. The initiator receives updated map information from an anchor and updates pre-existing map information based on the updated map information.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: May 21, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Junyi Li
  • Patent number: 11991662
    Abstract: Multiple user equipments (UEs) may initiate independent ranging sessions at nearly the same time and location and which may interfere with each other. A UE that receives multiple initial messages for ranging determines if there is temporal separation between the ranging sessions. The UE may further determine if there is geographic separation between the ranging sessions, e.g., the initiating UEs are separated. If separation is lacking, the UE separates available ranging signal properties, such as frequency bandwidth, timing instances, and identifiers, and communicates different sets of ranging signal properties to each initiating UE. The multiple ranging sessions may be performed using the different sets of ranging signal properties with less risk of interference.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: May 21, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Patent number: 11971499
    Abstract: A positioning method includes: establishing a positioning session between a plurality of positioning devices including a first positioning device and a second positioning device; obtaining line-of-sight/non-line-of-sight status (LOS/NLOS status) for a plurality of positioning device pairs, each being a pair of the plurality of positioning devices; and transmitting a disable message to the first positioning device based on the LOS/NLOS status of at least one of the first positioning device or the second positioning device being non-line-of-sight relative to at least a subset of the plurality of positioning devices, the disable message indicating to disable at least one of transmission of one or more first positioning reference signals from the first positioning device or measurement of one or more second positioning reference signals from the second positioning device by the first positioning device.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: April 30, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Patent number: 11970749
    Abstract: Provided is a method of manufacturing a hot rolled steel sheet having excellent formability and fatigue properties, including: preparing a slab including, by weight %, 0.3 to 0.8% of carbon C, 13 to 25% of manganese (Mn), 0.1 to 1.0% of vanadium (V), 0.005 to 2.0% of silicon (Si), 0.01 to 2.5% of aluminum (Al), 0.03% or less of phosphorus (P), 0.03% or less of sulfur (S), 0.04% or less (excluding 0%) of nitrogen (N), and a remainder of iron (Fe) and inevitable impurities; heating the slab to 1050 to 1250° C.; finish rolling, the slab heated in the heating, at a temperature of not lower than a recrystallization temperature of a region having an average V concentration and not higher than a recrystallization temperature of a region having twice the average V concentration, to obtain a hot rolled steel sheet; and coiling the hot-rolled steel sheet at 50 to 700° C.
    Type: Grant
    Filed: February 17, 2023
    Date of Patent: April 30, 2024
    Assignee: POSCO CO., LTD
    Inventors: Tae-Jin Song, Jeong-Eun Kim, Chang-Sik Choi
  • Patent number: 11960019
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may identify a plurality of UEs for a UE positioning session. The UE may identify a set of parameters for the UE positioning session. The UE may broadcast information indicating at least the set of parameters for the UE positioning session. The UE may receive, from at least one of the plurality of UEs, a set of positioning reference signals (PRSs) based at least in part on the set of parameters. The UE may broadcast, based at least in part on the set of PRSs, positioning information. Numerous other aspects are provided.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: April 16, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Peter Gaal
  • Patent number: 11950200
    Abstract: A method of wireless communication by a positioning entity includes determining an accuracy of a positioning estimate of a first non-anchor sidelink user equipment (UE). The method also includes determining the accuracy satisfies an accuracy condition. The method further includes configuring the first non-anchor sidelink UE as a first anchor UE based on the positioning estimate satisfying the accuracy condition.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: April 2, 2024
    Assignee: QUALCOMM INCORPORATED
    Inventors: Chang-Sik Choi, Kapil Gulati, Shuanshuan Wu
  • Patent number: 11924906
    Abstract: In a particular implementation, a method of wireless communication includes transmitting, from a first user equipment (UE) to a second UE, a radio resource control (RRC) request that includes a first discontinuous reception (DRX) preference at the first UE. The method also includes receiving, at the first UE from the second UE, a RRC setup message that includes a second DRX preference at the second UE. The method further includes transmitting, from the first UE to the second UE, a RRC setup complete message that includes an indication of a confirmed DRX cycle.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: March 5, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Sudhir Kumar Baghel, Shuanshuan Wu, Gabi Sarkis, Tien Viet Nguyen, Kapil Gulati, Chang-Sik Choi
  • Publication number: 20240031976
    Abstract: Aspects relate to group-based positioning reference signal (PRS) broadcast in a wireless communication network. Wireless communication devices communicating over a sidelink channel in the wireless communication network may be grouped into one or more positioning groups. Within each positioning group, a respective order of the wireless communication devices in the positioning group may be identified. The wireless communication devices in a positioning group may then communicate PRSs therebetween over the sidelink channel based on the order of wireless communication devices in the positioning group.
    Type: Application
    Filed: August 3, 2023
    Publication date: January 25, 2024
    Inventors: Chang-Sik CHOI, Kapil GULATI, Gene Wesley MARSH
  • Publication number: 20230413227
    Abstract: A vehicle-enabled user equipment (VUE) and related techniques are disclosed. In one aspect, the VUE issues a periodic broadcast, or signals a response to a requesting source, identifying its location management capability (LMC). The UE forms a link with a recipient VUE of the broadcast to perform joint localization of the pedestrian UE (PUE). Joint localization by VUE and another VUE may be performed by VUEs and PUEs in the region exchanging ranging signals and ego measurements. The VUE determines a location jointly of the PUE. The location can be determined upon a request, periodically, or in response to a triggered event.
    Type: Application
    Filed: August 2, 2023
    Publication date: December 21, 2023
    Inventors: Anantharaman BALASUBRAMANIAN, Kapil GULATI, Chang-Sik CHOI
  • Patent number: 11849394
    Abstract: A user equipment (UE) in a vehicle (V-UE) broadcasts multi-phased ranging signals with which other entities may determine the range to the V-UE. The multi-phased ranging signals may include a first message, which may be broadcast in the Intelligent Transport System (ITS) spectrum, includes ranging information, such as a source identifier, location information for the broadcasting V-UE, and an expected time of broadcast of the ranging signal. The ranging signal may then be broadcast at the expected time and may include the source identifier. A second message, which be broadcast in the ITS spectrum, may include clock error information for the V-UE. A receiving entity may determine the range to the V-UE based on the time of arrival of the ranging signal and the expected time of transmission, as well as the clock error information. The receiving entity may further generate a position estimate based on the received location information.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: December 19, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel, Urs Niesen, Jubin Jose, Anantharaman Balasubramanian
  • Patent number: 11825313
    Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a request for a first user equipment (UE) to provide sensing capability information associated with UEs other than the first UE (e.g., an indication of one or more sensors associated with the corresponding UE, an orientation of the corresponding UE, a field of view associated with the corresponding UE). Additionally, the first UE may receive, from each of a set of second UEs, indications of the sensing capability information associated with the corresponding second UEs. Based on the sensing capability information indicated for each of the set of second UEs, the first UE select a subset of second UEs and transmit an indication of the sensing capability information associated with the subset of second UEs to the base station.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 21, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Kyle Chi Guan, Kapil Gulati, Himaja Kesavareddigari, Chang-Sik Choi