Patents by Inventor Chang-geun Ahn

Chang-geun Ahn 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: 20200159902
    Abstract: Provided is a personal authentication device based on an auditory brainstem response signal. The personal authentication device includes a signal generator, a signal acquirer, and a signal processor. The signal generator may output an auditory stimulus to an ear of a user, using a sound generator. The signal acquirer may acquire a first reference potential corresponding to a first interval, from a first electrode in close contact with the other ear of the user, and acquire a first evoked potential corresponding to the first interval from a second electrode in close contact with the ear, based on the first reference potential. The signal processor may generate a first auditory brainstem response signal, based on the first reference potential and the first evoked potential, generate authentication data for the user from the first auditory brainstem response signal, and compare the authentication data with registration data to authenticate the user.
    Type: Application
    Filed: November 18, 2019
    Publication date: May 21, 2020
    Inventors: Hyung Wook NOH, Joo Yong SIM, Chang-Geun AHN, Bong Kyu KIM
  • Publication number: 20200047180
    Abstract: Provided is a centrifugal device. The centrifugal device includes a centrifugal part configured to provide an intermediate chamber into which a centrifugal object is put and a driving part disposed on a rotation axis passing through the intermediate chamber.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 13, 2020
    Inventors: Kwang Hyo CHUNG, Chul HUH, Bong Kyu KIM, Jin Tae KIM, Hyung Wook NOH, Joo Yong SIM, Chang-Geun AHN, Eun-Ju JEONG
  • Publication number: 20200019690
    Abstract: Provided is a biometric authentication system for authenticating a user. The biometric authentication system includes an input function generator generating an input function for determining a first time interval in a transmission interval in which an input signal is transmitted to a user, a second time interval in the transmission interval, a first frequency of the first time interval, and a second frequency of the second time interval, an input signal generator transmitting the input signal having the first frequency during the first time interval and the second frequency during the second time interval, to the user, based on the input function, and an authenticator acquiring a biometric signal generated in response to the input signal from the user and determining whether the user is authenticated based on the biometric signal.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 16, 2020
    Inventors: Joo Yong SIM, Hyung Wook NOH, Chang-Geun AHN
  • Patent number: 10468638
    Abstract: Provided is a structure of a pouch which may be used in a high-capacity battery having high capacity and high stiffness, wherein the pouch may include an upper housing module which includes a metallic base plate having a concave-shaped accommodation space and polymer layers formed on one surface or both surfaces of the base plate, and a lower pouch sheet which is combined with a lower surface of the upper housing module to seal the accommodation space.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: November 5, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Chang Bum Ahn, Hyuk Su Kim, Dae Geun Ku, Hyang Mok Lee
  • Publication number: 20190285625
    Abstract: A biosensor includes a solution chamber containing primary antibodies, secondary antibodies, and measuring substances, an injection fluid transfer unit for connection the solution chamber to an injection port, and a discharging transfer unit for connecting the solution chamber to a discharging port.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Inventors: Bong Kyu KIM, Chang-Geun AHN, Kwang Hyo CHUNG, Eun-Ju JEONG, Chul HUH, Seunghwan KIM, Jin Tae KIM, Won Kyoung LEE
  • Publication number: 20190250183
    Abstract: Provided is fluid control equipment for bio-reaction, including a pipette configured to transport a reaction solution, and a liquid pump configured to adjust the internal pressure of the pipette.
    Type: Application
    Filed: December 5, 2018
    Publication date: August 15, 2019
    Inventors: Kwang Hyo CHUNG, Bong Kyu KIM, Jin Tae KIM, Chang-Geun AHN, Eun-ju JEONG, Chul HUH
  • Publication number: 20190159705
    Abstract: A blood glucose prediction method comprising: acquiring a PAS signal by irradiating light to skin of the body, obtaining a photoacoustic image of the skin from the PAS signal, selecting at least one measurement location based on the photoacoustic image; and predicting the blood glucose based on a photoacoustic spectrum of a PAS signal corresponding to the at least one measurement location among the PAS signals, a blood glucose sensor, and a blood glucose prediction system are provided.
    Type: Application
    Filed: November 29, 2018
    Publication date: May 30, 2019
    Inventors: Joo Yong SIM, Chang-Geun AHN, Bong Kyu KIM, Eun-Ju JEONG, Kwang Hyo CHUNG, Chul HUH
  • Publication number: 20180264467
    Abstract: The present disclosure relates to a microfluidic control system and a microfluidic control method using the same. The microfluidic control system includes: a microfluidic chip including a storage chamber for storing a reaction solution and a receiving chamber communicating with the storage chamber; and a microfluidic control device for controlling the reaction solution inside the microfluidic chip, wherein the microfluidic control device includes: a first roller which is in contact with the microfluidic chip and rotates together with the movement of the microfluidic chip; and a pressurizing protrusion formed on the outer peripheral surface of the first roller, wherein the pressurizing protrusion has a shape corresponding to the storage chamber.
    Type: Application
    Filed: February 23, 2018
    Publication date: September 20, 2018
    Inventors: Kwang Hyo CHUNG, Jin Tae KIM, Eun-Ju JEONG, Bong Kyu KIM, Chang-Geun AHN
  • Publication number: 20180156755
    Abstract: Provided is an apparatus for detecting biomaterial and method of detecting biomaterial. The method include providing a sample including a fluorescent material and a biomaterial on one surface of an ultrasound receiving unit, and measuring an ultrasonic wave generated by the fluorescent material by emitting light to the sample.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 7, 2018
    Inventors: Eun-Ju JEONG, Bong Kyu KIM, Kwang Hyo CHUNG, Soo Jun PARK, Hyun Woo SONG, Joo Yong SIM, Chang-Geun AHN, Chul HUH
  • Publication number: 20170153206
    Abstract: Provided are a photo acoustic probe and a photo acoustic measurement device including the same. The photo acoustic probe includes a stage configured to receive a sample, a light source configured to provide light to the sample, a housing having an optical opening part and provided on the stage around the sample, a sound reception part disposed on one side inner wall of the housing to receive a sound induced from the sample, and a sound reflection part disposed in the optical opening part of the housing to transmit light and reflect sound to the sound reception part.
    Type: Application
    Filed: November 23, 2016
    Publication date: June 1, 2017
    Inventors: Joo Yong SIM, Bong Kyu KIM, Chang-Geun AHN
  • Publication number: 20170147864
    Abstract: Provided is a finger recognition device including a signal generating unit configured to generate a biometric signal, a signal detecting unit configured to receive the biometric signal via a finger and detect the biometric signal, and a finger recognition unit configured to compare the detected biometric signal with stored signal information to recognize the finger.
    Type: Application
    Filed: November 22, 2016
    Publication date: May 25, 2017
    Inventor: CHANG-GEUN AHN
  • Patent number: 9650238
    Abstract: A vibration device including a supporting portion formed to cover both ends of a vibration region, and a method of manufacturing the vibration device are provided. The vibration device may include a lower substrate on which an insulating layer is formed, an upper substrate connected onto the insulating layer, and including a vibration region that vibrates and that is separated from the lower substrate by at least a predetermined distance, and a supporting portion formed to cover both ends of the vibration region, to support the vibration region.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: May 16, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: In Bok Baek, Han Young Yu, Yark Yeon Kim, Young Jun Kim, Chang Geun Ahn, Yong Sun Yoon, Bong Kuk Lee, Ji Eun Lim, Won Ick Jang
  • Patent number: 9640736
    Abstract: Disclosed is a silicon nano crystal light emitting diode, including: a photoelectric conversion layer formed of a silicon nitride layer including a silicon nano crystal; an electron injection layer formed on the photoelectric conversion layer; and a hole injection layer, which faces the electron injection layer with the photoelectric conversion layer interposed therebetween, has an energy band gap higher than that of the photoelectric conversion layer, and has a refractive index lower than that of a silicon thin film.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 2, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chul Huh, Bong Kyu Kim, Chang Geun Ahn
  • Patent number: 9503624
    Abstract: Provided is an optical imaging system capable of increasing diagnosis reliability and preciseness, and efficiently observing a target. The optical imaging system using multiple light sources according to an embodiment of the present invention includes a first light source generating a first light modulated with a first frequency, a second light source generating a second light modulated with a second frequency, a camera simultaneously detecting multiple lights output from an object after the first and second lights are illuminated on the object and outputting multiple image detecting signals, and an image processing unit processing the multiple image detecting signals to obtain a first image representing a shape of the object and a second image representing a desired target portion of the object.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: November 22, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Eun-Ju Jeong, Bong Kyu Kim, Won Ick Jang, Chang-Geun Ahn, Hyun Woo Song
  • Patent number: 9471174
    Abstract: Provided is a control apparatus which may apply an electric signal to a specific point or area selected from a plane or may receive the signal from the specific point or area. The control apparatus includes an upper electrode and a lower electrode. When it is intended that an electric field is applied to a point in which the upper electrode and the lower electrode come in contact with each other, an electrical bias is applied to the lower electrode, and the upper electrode is maintained in a non-connected state. When it is intended that the bias is selectively applied, the upper electrode is maintained in a grounded state. Therefore, transferring of the field from the lower electrode to a ground electrode disposed at a bottom is shielded, and thus transferring of the electric signal is also blocked.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: October 18, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Chang-Geun Ahn
  • Patent number: 9418885
    Abstract: Disclosed is a semiconductor manufacturing apparatus including at least one pocket on which a passive subject on which deposition will be executed is mounted, and a carrier body having an insertion space to which the at least one pocket is detachably attached. Therefore, the semiconductor manufacturing apparatus shortens process time and reduces process expenses. The semiconductor manufacturing apparatus allows respective pockets to have different structures according to the positions of the pockets on the wafer carrier, and thus achieves uniform growth of a material on the surfaces of wafers regardless of the positions of the pockets.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: August 16, 2016
    Assignee: LG Innotek Co., Ltd.
    Inventors: Ki Bum Sung, Jo Young Lee, Mhan Joong Kim, Chang Geun Ahn, Jung Hyun Kim
  • Publication number: 20160233369
    Abstract: Disclosed is a silicon nano crystal light emitting diode, including: a photoelectric conversion layer formed of a silicon nitride layer including a silicon nano crystal; an electron injection layer formed on the photoelectric conversion layer; and a hole injection layer, which faces the electron injection layer with the photoelectric conversion layer interposed therebetween, has an energy band gap higher than that of the photoelectric conversion layer, and has a refractive index lower than that of a silicon thin film.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 11, 2016
    Inventors: Chul HUH, Bong Kyu KIM, Chang Geun AHN
  • Publication number: 20160209961
    Abstract: Provided herein is a touch sensor for sensing a touch of a user. The touch sensor includes a first electrode, a second electrode facing the first electrode, at least one piezoelectric element disposed between the first electrode and the second electrode, and electrode pads coupled to the first electrode.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 21, 2016
    Inventor: Chang Geun AHN
  • Patent number: 9207761
    Abstract: The present invention relates to an eye-gaze based control device. The eye-gaze based control device of the present invention may control a control target device according to an eye-gaze point of a user. Here, the eye-gaze based control device controls the control target device by controlling a size of an image displayed to the user, thereby more precisely controlling the control target device.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: December 8, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Chang-Geun Ahn
  • Publication number: 20150132186
    Abstract: Provided is a microanalysis method and system using a Field Effect Transistor (FET). The microanalysis method includes a channel region having a receptor molecule fixed; forming a nano-particle conjugate in the channel region by supplying a sample for test and the nano-particle conjugate to the FET; growing a probe material on the channel region; and measuring a current flowing through the channel region, wherein the receptor molecule is a material that is selectively bonded to a target molecule in the sample for test.
    Type: Application
    Filed: January 20, 2015
    Publication date: May 14, 2015
    Inventors: Chil Seong AH, Jong-Heon YANG, Chan Woo PARK, Chang-Geun AHN, Gun Yong SUNG