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公开(公告)号：US20220221494A1
公开(公告)日：2022-07-14
申请号：US17761589
申请日：2020-10-23
Inventor： Geun Ho LEE , Jae Yeob HWANG , Hee Sun LIM , Dong Gil KANG , Dong Ok KIM
IPC: G01R19/10 , G01K7/16 , H02M7/5395 , H02M1/00
Abstract: Disclosed are a current measurement method for a three-phase pulse width modulation inverter using a real-time switch junction temperature estimation technique, and a three-phase pulse width modulation inverter system. The current measurement method may comprise the steps of: calculating a power loss of a switch of an inverter; estimating the junction temperature (T j) of the switch by using a thermal equivalent circuit; estimating a resistance (R ds on) value between both ends of a drain and a source by using a resistance (R ds on) map based on the junction temperature (T j); and using, as a control signal of the inverter, a current value calculated based on the estimated resistance (R ds on) value.
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公开(公告)号：US20220210352A1
公开(公告)日：2022-06-30
申请号：US17562712
申请日：2021-12-27
Inventor： Yeong Min JANG , AHMED MD FAISAL
IPC: H04N5/353 , H04B10/116
Abstract: An optical communication-based image processing system is disclosed. The system may include a transmitter having at least one light emitting element and a receiver having a rolling shutter camera. As the system is provided, a rolling shutter effect may be improved.
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公开(公告)号：US20220209691A1
公开(公告)日：2022-06-30
申请号：US17697899
申请日：2022-03-17
Inventor： Geun Ho LEE , Dong Gil KANG , Soon Ho KWON , Ji Hwan PARK , Joon Ik UHM , Hee Sun LIM , Jung Jun KIM
IPC: H02P6/16
Abstract: A method for detecting an initial position of a rotor of a permanent magnet synchronous motor in a no-load environment can comprise the steps of: estimating a temporary initial position α′ by means of aligning a d axis; measuring a first voltage command which is output by performing velocity control within predetermined velocity ranges with respect to the forward direction of a motor on the basis of the temporary initial position α′; measuring a second voltage command which is output by performing velocity control within the predetermined velocity range with respect to the reverse direction of the motor on the basis of the temporary initial position α′; calculating respective variations of the first voltage command and second voltage command, and calculating a compensation angle α″; and calculating an initial position α of the rotor on the basis of the sum of the temporary initial position α′ and compensation angle α″.
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公开(公告)号：US20220166521A1
公开(公告)日：2022-05-26
申请号：US17361879
申请日：2021-06-29
Inventor： Yeong Min Jang , Ngoc Huy Nguyen
IPC: H04B10/69 , H04B10/116 , H04L5/00
Abstract: A communication device effectively transmits high-speed data while being less affected by restrictions of an environment by adjusting a communication channel depending on an optical communication environment.
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公开(公告)号：US20220129547A1
公开(公告)日：2022-04-28
申请号：US17081810
申请日：2021-02-01
Inventor： Ji Hoon KWON , Joo Hee LEE , Hyo Jin YOON , Ji Hoon CHO , Dong Guk HAN , Bo Yeon SIM , Il Ju KIM , Tae Ho LEE , Jae Seung HAN
Abstract: A method for preventing side-channel attack according to an embodiment includes generating an order table which includes a position index value for each bit value of a bit string that is secret information to be generated through a decryption algorithm of an Nth Degree Truncated Polynomial Ring Units (NTRU) LPRime algorithm, shuffling a sort order of the position index value for the each bit value in the order table based on a random number, determining a generation order for the each bit value according to the sort order of the position index value for the each bit value in the order table, and generating the secret information through the decryption algorithm. The secret information is generated by generating the each bit value according to the determined generation order.
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Patent Agency Ranking
公开(公告)号：US11282998B2
公开(公告)日：2022-03-22
申请号：US16832296
申请日：2020-03-27
Inventor： Hyun Jung Lee , Jong Chan Baek , Hyun Woo Bark , Jung Hun Oh
Abstract: Disclosed herein are a flexible thermoelectric module cell for a touch sensor, a touch sensor including the same, and a method of manufacturing the flexible thermoelectric module cell for a touch sensor. The flexible thermoelectric module cell is applicable to cells for touch sensors of various designs, without the need for a person to go directly to an industrially dangerous place.
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公开(公告)号：US20220055501A1
公开(公告)日：2022-02-24
申请号：US17404028
申请日：2021-08-17
Applicant: HYUNDAI MOTOR COMPANY , KIA CORPORATION , KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION
Inventor： Jae Jun Ha , Gu Min Jeong , Hyun Jung Oh , Seung Hyeon Lee
Abstract: An apparatus for managing a shared personal mobility (PM) vehicle comprises a battery unit configured to supply power, a communication unit configured to communicate with a server and road side units, and a control unit configured to determine whether to manage a PM vehicle based on at least one of a position, a position change, and a battery charge amount of the PM vehicle and transmit a management notification message to the server.
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138.发明申请公开(公告)号：US20210297235A1
公开(公告)日：2021-09-23
申请号：US17185274
申请日：2021-02-25
Applicant: IUCF-HYU (Industry-University Cooperation Foundation Hanyang University) , Kookmin University Industry Academy Cooperation Foundation
Abstract: Disclosed are homomorphic encryption method and apparatus specialized for zero-knowledge proof. The homomorphic encryption method specialized for zero-knowledge proof includes (a) dividing a message M into n message blocks; (b) generating a ciphertext CT by encrypting the n message blocks, wherein the ciphertext CT includes each encryption block for each of the n message blocks, and each encryption block includes the message block in the form Gimi of an exponentiation of a generator G; and (c) generating a zero-knowledge proof key π for the n message blocks by applying the n message blocks as inputs to a preset zero-knowledge proof algorithm.
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139.发明授权公开(公告)号：US11111340B2
公开(公告)日：2021-09-07
申请号：US17255422
申请日：2019-05-09
Inventor： Moon Hee Sung , Misun Kwak , Sang Joon Park
IPC: C08F283/04 , C08G69/48 , C08L77/00 , C08F2/46 , C08F2/50 , C08G61/04 , C08J3/075 , A61K8/88 , A61L27/18 , A61Q19/00 , C08J3/24 , C08J3/28
Abstract: The present invention relates to a method of preparing a poly-γ-glutamic acid hydrogel using ultraviolet ray and to a use of the poly-γ-glutamic acid hydrogel prepared by the method, and the method of preparing poly-γ-glutamic acid hydrogel using ultraviolet irradiation according to the present invention solved the problem of microbial contamination in the poly-γ-glutamic acid solution, and produced poly-γ-glutamic acid hydrogel in high yield by only a simple treatment process, and as it was confirmed that the poly-γ-glutamic acid hydrogel has improved storage stability in a solution, the poly-gamma-glutamic acid hydrogel prepared by the method of preparing the same of the present invention can be provided as a tissue engineering scaffold, artificial organs and bio-ink for 3D printing.
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公开(公告)号：US11071973B2
公开(公告)日：2021-07-27
申请号：US16963713
申请日：2019-01-22
Inventor： Sungho Yoon , Senkuttuvan Rajendiran , Jianwei Jiang , Kwang Ho Park
IPC: B01J31/16 , B01J37/00 , C07D305/12 , C07D307/60
Abstract: The present invention relates to a transition metal-based heterogeneous carbonylation reaction catalyst that has an excellent catalytic activity and selectivity in the carbonylation reaction and is easily separated from a product, by crosslinking polymerizing a transition metal-based homogeneous catalyst unit through a Friedel-Craft reaction; and a method for preparing lactone using the same. The transition metal-based heterogeneous carbonylation reaction catalyst allows to produce lactone or succinic anhydride with an epoxide compound while showing a high selectivity, and can be applied in industrial very usefully due to easy separation from the product and thus reusing thereof.
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