公开(公告)号：US10822543B2

公开(公告)日：2020-11-03

申请号：US16182885

申请日：2018-11-07

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Chuljong Han ,  Byungwook Yoo ,  Jiyong Kim ,  Jeongmin Yi

IPC: H01B1/06 ,  C09K11/00 ,  C09K11/70 ,  C09K11/62 ,  H01L31/0352 ,  B82Y5/00 ,  B82Y15/00 ,  C09K11/56 ,  C09K11/02

Abstract: The present disclosure provides a quantum dot having a core-shell structure. To have superior quantum efficiency and optical stability, the quantum dot is of a five element system of Zn—Cu—In—P—S. The quantum dot includes a core formed of In(Zn)P material and doped with copper. The quantum dot further comprises a first shell formed of Cu—Zn—In—S material and surrounding the core and a second shell formed ZnS material and surrounding the first shell.

公开(公告)号：US10811197B2

公开(公告)日：2020-10-20

申请号：US16064611

申请日：2016-12-21

Applicant: University of Florida Research Foundation, Inc. ,  KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Kyoung Tae Kim ,  Yong-Kyu Yoon ,  Dongsu Kim

IPC: H01G11/46 ,  C25D11/26 ,  H01G9/048 ,  A61L2/16 ,  B32B3/10 ,  H01G9/042 ,  H01G9/04 ,  H01G11/86

Abstract: Various examples are provided for hydrothermally grown BaTiO3, SrTiO3, and BaxSr1−xTiO3 on TiO2 nanotube layers, which can be used in ultra-high charge density capacitors. In one example, a method includes forming a first anodized titanium oxide (ATO) layer on a layer of titanium by anodization, the first ATO layer having a nanotubular morphology; removing the first ATO layer from the layer of titanium; forming a second ATO layer having a nanotubular morphology on the layer of titanium by anodization; and hydrothermally growing a layer of MTiO3 on a surface of the second ATO layer, where M is Ba, Sr, or BaxSr1−x. In another example, an ultra-high density charge capacitor includes a first electrode layer; an ATO layer disposed on the first electrode layer; a layer of MTiO3 on a surface of the ATO layer; and a second electrode layer disposed on the layer of MTiO3.

公开(公告)号：US10786175B2

公开(公告)日：2020-09-29

申请号：US15409405

申请日：2017-01-18

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Suk Won Jung ,  Young Chang Jo ,  Woo Kyeong Seong ,  Yun Jae Won ,  Hyuck Ki Hong

IPC: A61B5/053 ,  A61B5/00 ,  A61B5/05

Abstract: Disclosed is a sensor for measuring skin conductivity and a method of manufacturing the same, wherein the sensor includes: a base board made of a flexible material; an electrode provided on a surface of the base board, and transmitting an electrical signal; and an uneven structure provided on the electrode, and configured to increase an electrical contact area with skin via sweat secreted onto a surface of skin.

公开(公告)号：US20200272241A1

公开(公告)日：2020-08-27

申请号：US16872708

申请日：2020-05-12

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yeon Hwa KWAK ,  Kun Nyun KIM ,  Won Hyo KIM

IPC: G06F3/01 ,  G01L1/22

Abstract: The described technology relates to a hand gesture recognition sensor. In one aspect, the hand gesture recognition sensor includes at least one strain unit configured to measure a physical change in an epidermis of a human body. The hand gesture recognition sensor also includes at least one bump unit located in a measurement direction of the at least one strain unit so as not to overlap the at least one strain unit, the at least one bump unit configured to amplify the physical change.

公开(公告)号：US10670702B2

公开(公告)日：2020-06-02

申请号：US15569538

申请日：2015-09-03

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Hyun Yong Choi ,  Choul Jun Choi ,  Seung Hun Oh ,  Hyun Chang Cho

IPC: G01C3/08 ,  G01S7/481 ,  G01S17/89 ,  G02B26/10 ,  G01S17/931

Abstract: A light detection and ranging (LiDAR) optical system, according to one embodiment of the present invention, comprises: a first mirror which is disposed to make a predetermined first angle with a horizontal plane and has a first hollow; a light source for outputting a pulse laser from the lower portion of the first mirror; a second mirror which is disposed to make a predetermined second angle with the first mirror so that the pulse laser passes through the first hollow and travels to a measurement target; at least two path control mirrors which reflect the pulse laser so that the path of the pulse laser is formed on a reflective surface of the second mirror; a light receiving lens for receiving, from the lower portion of the first mirror, light which has been reflected through the first mirror.

公开(公告)号：US20200007056A1

公开(公告)日：2020-01-02

申请号：US16451192

申请日：2019-06-25

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Joonsung PARK ,  Junhyuk CHOI ,  Jinhong KIM ,  Byongjo Hyon ,  Yongsu NOH ,  Dongmyoung JOO

IPC: H02P6/182 ,  H02P6/10

Abstract: The present disclosure provides a motor drive device and a motor drive system for improving a control stability despite an imbalance in zero crossing points in a sensorless motor of which position of a rotor is estimated by a counter electromotive force. The motor drive device includes: a position detector configured to detect a rotational position of a rotor of a motor by detecting a plurality of zero crossing points of a counter electromotive force induced in the motor; and a controller configured to control the motor by estimating a phase change timing based on a time interval between a current zero crossing point and a previous zero crossing point of a same state as the current zero crossing point among the plurality of zero crossing points detected by the position detector.

公开(公告)号：US20190299531A1

公开(公告)日：2019-10-03

申请号：US16446521

申请日：2019-06-19

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jaehyoun Park ,  Yonggon Seo ,  Jinkoog Shin

IPC: B29C64/277 ,  B29C64/393

Abstract: The present application relates to a linear light source using ultraviolet light emitting diodes (LEDs), and a photopolymer 3D printer comprising the linear light source. The linear light source may include a substrate distanced from a polymer case of the photopolymer 3D printer and an ultraviolet LED array in which a plurality of ultraviolet LEDs, which project ultraviolet rays toward the polymer case, are arranged on the substrate in multiple rows in the X-axis direction. The arrangement of the multiple columns in the Y-axis direction is at an oblique angle to the multiple rows.

公开(公告)号：US10422863B2

公开(公告)日：2019-09-24

申请号：US15314880

申请日：2016-03-10

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Hyunyong Choi ,  Chouljun Choi ,  Seunghun Oh ,  Hyunchang Cho ,  Seungjoo Lee

IPC: G01C3/08 ,  G01S7/481 ,  G01S7/483 ,  G01S17/10 ,  G01S17/42 ,  G01S17/89 ,  G01S17/93

Abstract: One aspect is a scanning light detection and ranging (LiDAR) having an optical structure which shares a transmitting and receiving lens. In one embodiment, the LiDAR includes a hole mirror disposed to have a first angle with respect to a horizontal surface and including a hole and a reflecting surface and a beam source configured to output a pulsed laser beam from one side of the hole mirror toward the hole. The LiDAR also includes a transmitting and receiving lens configured to generate a collimated beam to move the pulsed laser beam which passed through the hole toward a measurement target, receive a beam reflected from the measurement target, and transmit the reflected beam to the hole mirror. The LiDAR further includes a beam detector disposed to face the reflecting surface of the hole mirror and configured to receive the beam reflected from the hole mirror and convert the reflected beam into an electronic signal.

公开(公告)号：US20190265332A1

公开(公告)日：2019-08-29

申请号：US16344926

申请日：2016-11-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Hyunyong CHOI ,  Hyunchang CHO

IPC: G01S7/484 ,  G01S17/02

Abstract: The present invention relates to a light transmitting and receiving device and method, which output the power of a partial optical pulse such that the power thereof is different from that of another optical pulse, so as to receive reflected light, and identify whether an object, which is undetectable using the reflected light of an optical pulse outputted with relatively low power, is detected using the reflected light of an optical pulse outputted with relatively high power, so as to adjust the power of an optical pulse to be output thereafter. Therefore, detection efficiency can be maximized using low power while eye safety requirements are satisfied.

公开(公告)号：US10374532B2

公开(公告)日：2019-08-06

申请号：US15660140

申请日：2017-07-26

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Joonsung Park ,  Jinhong Kim ,  Byongjo Hyon ,  Junhyuk Choi

IPC: H02P6/12 ,  H02P6/08 ,  H02P29/024 ,  H02P6/24 ,  H02P6/18

Abstract: Disclosed are an apparatus, system and method for detecting, based on a mathematical model, a fault of a permanent magnet motor driven by a square wave. A fault diagnosis apparatus for the permanent magnet motor includes a current voltage measurement unit, a phase shift time calculation unit, and a control unit.