Patents by Inventor Jung-han Choi

Jung-han 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: 11474120
    Abstract: The present invention relates to a separable cassette for measuring glycated hemoglobin. It is easy to use the separable cassette for measuring glycated hemoglobin of the present invention since a reagent is sequentially leaked during the rotation thereof. In addition, there is no need to shake the reagent beforehand, as the reagent without residual reagent is fully discharged by the rotation. Therefore, the measurement result is accurate because an error between the amount of the reagent used and the amount of sample blood is small.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: October 18, 2022
    Assignee: GREEN CROSS MEDICAL SCIENCE
    Inventors: Hyu Jeong Kim, Hyong Soo Kim, Dong Han Kim, Eun Myung Shin, Jung Sub Shin, Soon Min Hong, Su Hyun Lee, Dong Cheol Choi
  • Publication number: 20220319905
    Abstract: Disclosed is a support unit. The support unit that supports a substrate may include a chuck stage that is rotatable, a heating member disposed above the chuck stage and that heats the substrate supported by the support unit, a power source that applies electric power to the heating member, a window disposed above the chuck stage and defining an interior space, in which the heating member is disposed, and an interlock module that selectively cuts off the electric power applied to the heating member.
    Type: Application
    Filed: March 25, 2022
    Publication date: October 6, 2022
    Applicant: SEMES CO., LTD.
    Inventors: Soo Han SONG, Chul Goo KIM, Jung Bong CHOI, Kang Seop YUN
  • Patent number: 10958037
    Abstract: It is provided a laser arrangement, having an electro-absorption-modulated laser, having a laser section and an electro-absorption modulator section; a current source for supplying the laser section with current; a DC voltage source that is arranged in addition to the current source and can be used to apply DC voltage to a diode structure of the electro-absorption modulator section; a driver with which an RF signal is able to be fed to the laser; and an electrical connection via which the driver is connected to the laser. The electrical connection provides a direct current connection between the driver and the laser such, and the driver is configured such, that a photocurrent that is generated in the electrode-absorption modulator section of the laser by illumination with light of the laser section at least partially flows to the driver and at least contributes to the energy supply of the driver.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: March 23, 2021
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Jung Han Choi, Heinz-Gunter Bach, Lei Yan
  • Publication number: 20200076159
    Abstract: the laser arrangement (1) is configured such that the electrical connection (14) provides a direct current connection between the driver (13) and the laser (11) such that a photocurrent (Iphoto) that is generated in the electrode-absorption modulator section (112) of the laser (11) by illumination with light of the laser section (111) at least partially flows to the driver (13) and at least contributes to the energy supply of the driver (13).
    Type: Application
    Filed: December 7, 2017
    Publication date: March 5, 2020
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Jung Han CHOI, Heinz-Gunter BACH, Lei YAN
  • Patent number: 10088512
    Abstract: It is provided a vectorial network analyzer, comprising an input and output measuring device; a beat source for generating an optical beat signal; an optical transmission device which divides the optical beat signal into at least one first and one second partial signal, wherein the transmission device conducts the first partial signal to at least one terahertz transmitter and the second partial signal to at least one terahertz receiver and/or to at least one terahertz reference receiver; and a phase changing unit for varying the phase of the first and/or the second partial signal of the optical beat signal.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: October 2, 2018
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Karl-Otto Velthaus, Thorsten Göbel, Jung Han Choi
  • Publication number: 20180224489
    Abstract: It is provided a vectorial network analyzer, comprising an input and output measuring device; a beat source for generating an optical beat signal; an optical transmission device which divides the optical beat signal into at least one first and one second partial signal, wherein the transmission device conducts the first partial signal to at least one terahertz transmitter and the second partial signal to at least one terahertz receiver and/or to at least one terahertz reference receiver; and a phase changing unit for varying the phase of the first and/or the second partial signal of the optical beat signal.
    Type: Application
    Filed: June 7, 2016
    Publication date: August 9, 2018
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Karl-Otto VELTHAUS, Thorsten GÖBEL, Jung Han CHOI
  • Patent number: 9835927
    Abstract: An electro-optical modulator device is provided. The electro-optical modulator device comprises at least one electro-optical modulator having a first and a second optical waveguide and an electrode arrangement for applying a voltage across the optical waveguide, wherein the electrode arrangement comprises a plurality of first waveguide electrodes and a plurality of second waveguide electrodes arranged on top of the first and the second optical waveguide, respectively, wherein the first and second waveguide electrodes are capacitively coupled to one another; and at least one driver unit for supplying a voltage to the electrode arrangement; and an electrical connection between the driver unit and the electrode arrangement. The electrical connection between the driver unit and the electrode arrangement comprises a flexible coplanar strip line.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: December 5, 2017
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Karl-Otto Velthaus, Marko Rausch, Jung Han Choi, Lei Yan
  • Publication number: 20160363834
    Abstract: An electro-optical modulator device is provided. The electro-optical modulator device comprises at least one electro-optical modulator having a first and a second optical waveguide and an electrode arrangement for applying a voltage across the optical waveguide, wherein the electrode arrangement comprises a plurality of first waveguide electrodes and a plurality of second waveguide electrodes arranged on top of the first and the second optical waveguide, respectively, wherein the first and second waveguide electrodes are capacitively coupled to one another; and at least one driver unit for supplying a voltage to the electrode arrangement; and an electrical connection between the driver unit and the electrode arrangement. The electrical connection between the driver unit and the electrode arrangement comprises a flexible coplanar strip line.
    Type: Application
    Filed: November 25, 2014
    Publication date: December 15, 2016
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Karl-Otto VELTHAUS, Marko RAUSCH, Jung Han CHOI, Lei YAN
  • Patent number: 8577308
    Abstract: Disclosed are a beamformer and a beamforming method. The beamformer includes a plurality of dividers, each of which divides an input signal along a plurality of paths, an input switch which selects one of the dividers such that the input signal is input to the selected divider, a phase shifter which shifts phases of respective output signals from the divider, and an output switch which transmits the output signals from the phase shifter to an antenna.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Tae Choi, Jung-Han Choi, Young-Hwan Kim, Dong-Hyun Lee, Hong-Yi Kim, Ki-Chan Eun, Chul-Soon Park
  • Publication number: 20130194754
    Abstract: An apparatus for a single chip package using Land Grid Array (LGA) coupling is provided. The apparatus includes a multi-layer substrate, at least one integrated circuit chip, and a Printed Circuit Board (PCB). The a multi-layer substrate has at least one substrate layer, has at least one first chip region and at least one second chip region in a lowermost substrate layer, configures a transmission line transition of a vertical structure for transmitting a signal from at least one integrated circuit chip coupled in the first chip region in a coaxial shape or in a form of a Co-Planar Waveguide guide (CPW), and has an LGP coupling pad for connecting with a Printed Circuit Board (PCB) in the lowermost layer. The at least one integrated circuit chip is coupled in the first chip region and the second chip region. The PCB is connected with the multi-layer substrate using the LGA coupling via the LGA coupling pad.
    Type: Application
    Filed: October 5, 2011
    Publication date: August 1, 2013
    Applicant: Samsung Electronics Co. Ltd.
    Inventors: Dong-Yun Jung, Sung-Tae Choi, Young-Hwan Kim, Jung-Han Choi, Ji-Hoon Kim, Jei-Young Lee, Dong-Hyun Lee
  • Patent number: 8497742
    Abstract: A waveguide of a multi-layer metal structure and a manufacturing method thereof are provided, the method including applying a plurality of metal layers on a substrate and a plurality of insulating layers respectively between the respective metal layers. Accordingly, it is possible to minimize conductive loss by dispersing current uniformly through wide regions between a signal line and ground lines.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: July 30, 2013
    Assignees: Samsung Electronics Co., Ltd., Seoul National University Industry Foundation
    Inventors: Dong-hyun Lee, Young-hwan Kim, Sung-tae Choi, Jung-han Choi, Cheol-gyu Hwang, Young-woo Kwon, Woo-yeol Choi
  • Patent number: 8188836
    Abstract: A high frequency signal switching apparatus includes a bias unit which transmits a bias power source; a control signal transmitter, which provides a control signal received from outside; and a switching unit, so that the input signal input through the input terminal by switching one or more diodes according to the control signal driven by the bias power source is output selectively on the output terminal.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: May 29, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-han Choi, In-sang Song
  • Patent number: 8018308
    Abstract: A downward type micro electro mechanical system (EMS) switch and a method of fabricating the same is provided. The downward type MEMS switch includes first and second cavities formed in a substrate, first and second actuators formed on upper portions of the first and second cavities, first and second fixing lines formed on an upper surface of the substrate and not overlapped with the first and second cavities, and a contact pad which is spaced apart at a predetermined distance from surfaces of the first fixing line and the second fixing line but which can be contacted with the first fixing line and the second fixing line when the first actuator and the second actuator are driven. The contact pad, which is actuated downward by piezoelectricity, is fabricated as it shares a layer with a RF signal line, after the RF signal line is fabricated.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: September 13, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-wook Kwon, Jong-seok Kim, In-sang Song, Sang-hun Lee, Dong-kyun Kim, Jung-han Choi, Young-tack Houng, Che-heung Kim
  • Patent number: 8004375
    Abstract: Provided is an Electromagnetic Bandgap (EBG) structure, particularly, a resonator and a bandpass filter having an overlay EBG structure, and a method of manufacturing the resonator. The resonator is manufactured by forming a transmission line and ground plates on a substrate, arranging a plurality of reflector units at regular intervals along the longitudinal direction of the transmission line, and removing at least one reflector among the plurality of reflectors, thus forming a common resonating mode. Therefore, since reflector units constructing capacitance components are separated from a substrate, it is possible to prevent electromagnetic waves from leaking out of the substrate and ensure a high Q characteristic in a high frequency environment due to a resonating unit formed between the reflector units.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: August 23, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Cheol-gyu Hwang, Sung-tae Choi, Jung-han Choi, Seung-ho Hwang, Young-hwan Kim, Dong-hyun Lee
  • Patent number: 7968973
    Abstract: A semiconductor element for macro and micro frequency tuning, and an antenna and a frequency tuning circuit having the semiconductor element, are provided. The semiconductor element includes first and second semiconductors which have a same polarity, a third semiconductor which has a polarity opposite to the polarity of the first and second semiconductors and is interposed between the first and the second semiconductors, a first intrinsic semiconductor which is interposed between the first and the third semiconductors, and a second intrinsic semiconductor which is interposed between the third and the second semiconductors.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: June 28, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-won Jung, Jung-han Choi, In-sang Song, Young-eil Kim
  • Patent number: 7880567
    Abstract: Provided is an electromagnetic bandgap (EBG) structure, and particularly, an overlay EBG structure in which a plurality of vias and a plurality of plates are formed at intervals on a central signal line in such a manner that the vias and plates extend vertically from a substrate in order to reduce leakage loss of an electromagnetic wave through the substrate. Therefore, it is possible to prevent an electromagnetic wave passing through a transmission line from being lost through the substrate, to obtain desired frequency characteristics by adjusting the dimensions of the vias and plates, and to manufacture the overlay EBG structure using an existing CMOS process without having to perform any additional process.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: February 1, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Cheol-gyu Hwang, Sung-tae Choi, Jung-han Choi, Young-hwan Kim, Dong-hyun Lee
  • Patent number: 7859460
    Abstract: Provided is a switched beam-forming apparatus which includes a beam-forming unit forming a plurality of beams using an array antenna, a beam selection adjusting unit measuring Quality of Service (QoS) values of each of a plurality of signals received through the plurality of beams, a beam selecting unit selecting at least two beams with high QoS from among the plurality of beams according to the results of the QoS measuring, and a beam combining unit combining the at least two beams selected by the beam selecting unit.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: December 28, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Cheol-gyu Hwang, Sung-tae Choi, Young-hwan Kim, Jung-han Choi, Dong-hyun Lee, Jae-hyon Kim, Hyun-cheol Park, Yu-sung Lee, Han-kil Lee
  • Publication number: 20100244997
    Abstract: A waveguide of a multi-layer metal structure and a manufacturing method thereof are provided, the method including applying a plurality of metal layers on a substrate and a plurality of insulating layers respectively between the respective metal layers. Accordingly, it is possible to minimize conductive loss by dispersing current uniformly through wide regions between a signal line and ground lines.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 30, 2010
    Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATION
    Inventors: Dong-hyun Lee, Young-hwan Kim, Sung-tae Choi, Jung-han Choi, Cheol-gyu Hwang, Young-woo Kwon, Woo-yeol Choi
  • Patent number: 7795996
    Abstract: A multilayered coplanar waveguide (CPW) filter unit and a method of manufacturing the same are provided. A plate having a capacitance element is formed on or below a CPW layer including a signal line for transmitting a signal and a ground plane. As the filter unit has a multilayered structure, characteristic impedance may be reduced without increasing the width of the signal line. Where an inductor line is inserted between the signal line and the plate, a clear frequency response curve may be obtained without performing an additional process or increasing the area of the filter unit.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: September 14, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-tae Choi, Jung-han Choi, Cheol-gyu Hwang, Young-hwan Kim, Dong-hyun Lee
  • Publication number: 20090270051
    Abstract: Disclosed are a beamformer and a beamforming method. The beamformer includes a plurality of dividers, each of which divides an input signal along a plurality of paths, an input switch which selects one of the dividers such that the input signal is input to the selected divider, a phase shifter which shifts phases of respective output signals from the divider, and an output switch which transmits the output signals from the phase shifter to an antenna.
    Type: Application
    Filed: November 11, 2008
    Publication date: October 29, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-tae Choi, Jung-han Choi, Young-hwan Kim, Dong-hyun Lee, Hong-yi Kim, Ki-chan Eun, Chul-soon Park