Patents by Inventor Gunn Hwang

Gunn Hwang 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: 20190336070
    Abstract: The circuit may include bio-stimulating signal generating circuit which generates a bio-stimulating signal in a bio-stimulating mode, a bio-signal electrode which delivers the bio-stimulating signal generated in the bio-stimulating mode and receives a bio-signal in a bio-signal measuring mode, a switch block which is turned on when a voltage of the bio-stimulating signal is greater than a first reference voltage which is greater than a second reference voltage or lower than the second reference voltage, first and second resistors, and a bio-signal measuring circuit which measures voltage signals divided by the first and second resistors or measures a signal of the bio-signal electrode according to whether the switch block is turned on. The first and second resistors may be serially connected between the bio-signal electrode and the switch block, and divide a voltage of a signal of the bio-signal electrode when the switch block is turned on.
    Type: Application
    Filed: July 16, 2019
    Publication date: November 7, 2019
    Inventors: WooSub YOUM, Sung Q LEE, Gunn HWANG
  • Patent number: 10452143
    Abstract: A device and method is described for electronic human prosthetics, and specifically a skull- and/or spine implantable bi-directional neural-communication/brain-machine interface (BBMI) device where the input, output and on-board computing are combined into a single unit to form a compact neuro-prosthetics device. This invention is also directed to a fully implantable wireless spinal electronic recording and stimulation system using the BBMI in a human. The bi-directional devices (BBMIs) communicate with other bi-directional brain-machine interface devices (BBMI) and/or with external controllers wirelessly. The compact implantable stimulator has ultrasonic secondary battery charging system. One or more BBMI can be wirelessly connected so that a closed loop of BBMIs, or a BBMI and an external controller, can wirelessly send trigger pulses to this fully implanted stimulator over the spinal cord.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: October 22, 2019
    Assignees: San Diego State University Research Foundation, Electronics and Telecommunication Research Institute
    Inventors: Kee S. Moon, Yusuf Ozturk, Sung Q. Lee, Woosub Youm, Gunn Hwang
  • Patent number: 10390756
    Abstract: The circuit may include bio-stimulating signal generating circuit which generates a bio-stimulating signal in a bio-stimulating mode, a bio-signal electrode which delivers the bio-stimulating signal generated in the bio-stimulating mode and receives a bio-signal in a bio-signal measuring mode, a switch block which is turned on when a voltage of the bio-stimulating signal is greater than a first reference voltage which is greater than a second reference voltage or lower than the second reference voltage, first and second resistors, and a bio-signal measuring circuit which measures voltage signals divided by the first and second resistors or measures a signal of the bio-signal electrode according to whether the switch block is turned on. The first and second resistors may be serially connected between the bio-signal electrode and the switch block, and divide a voltage of a signal of the bio-signal electrode when the switch block is turned on.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: August 27, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: WooSub Youm, Sung Q Lee, Gunn Hwang
  • Patent number: 10078069
    Abstract: The inventive concept relates to a device that detects a leak of a liquid leaked from a sinkhole, water pipe or oil pipeline under the ground. In the detection device of the inventive concept, a plurality of reception devices disposed on the surface of the earth simultaneously receive an ultrasonic signal transmitted from a transmission device under the ground and a radio frequency (RF) signal synchronized with the ultrasonic signal. Also, by measuring an arrival time of the ultrasonic signal by using the wireless signal received by each reception device as a triggering signal, a leak range of a liquid leaked from a sinkhole, water pipe or oil pipeline on a signal path between the transmission device and the reception device is detected.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: September 18, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gunn Hwang, Sung Q Lee, WooSub Youm
  • Patent number: 10008888
    Abstract: Provided is a wireless power transmission system. The wireless power transmission system includes a power supply unit generating amplified power; a wireless power transmission unit receiving and converting the amplified power into wireless power; a wireless power reception unit receiving and converting the wireless power into charging power; and a charging unit receiving the charging power, wherein the charging unit includes a battery to store the charging power and the power supply unit includes a power detection unit identifies the charged state of the battery based on the amplified voltage and amplified current of the amplified power.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: June 26, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: WooSub Youm, Sung Q Lee, Gunn Hwang
  • Publication number: 20170238865
    Abstract: The circuit may include bio-stimulating signal generating circuit which generates a bio-stimulating signal in a bio-stimulating mode, a bio-signal electrode which delivers the bio-stimulating signal generated in the bio-stimulating mode and receives a bio-signal in a bio-signal measuring mode, a switch block which is turned on when a voltage of the bio-stimulating signal is greater than a first reference voltage which is greater than a second reference voltage or lower than the second reference voltage, first and second resistors, and a bio-signal measuring circuit which measures voltage signals divided by the first and second resistors or measures a signal of the bio-signal electrode according to whether the switch block is turned on. The first and second resistors may be serially connected between the bio-signal electrode and the switch block, and divide a voltage of a signal of the bio-signal electrode when the switch block is turned on.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 24, 2017
    Inventors: WooSub YOUM, Sung Q LEE, Gunn HWANG
  • Publication number: 20170108926
    Abstract: A device and method is described for electronic human prosthetics, and specifically a skull- and/or spine implantable bi-directional neural-communication/brain-machine interface (BBMI) device where the input, output and on-board computing are combined into a single unit to form a compact neuro-prosthetics device. This invention is also directed to a fully implantable wireless spinal electronic recording and stimulation system using the BBMI in a human. The bi-directional devices (BBMIs) communicate with other bi-directional brain-machine interface devices (BBMI) and/or with external controllers wirelessly. The compact implantable stimulator has ultrasonic secondary battery charging system. One or more BBMI can be wirelessly connected so that a closed loop of BBMIs, or a BBMI and an external controller, can wirelessly send trigger pulses to this fully implanted stimulator over the spinal cord.
    Type: Application
    Filed: October 17, 2016
    Publication date: April 20, 2017
    Inventors: Kee S. Moon, Yusuf Ozturk, Sung Q. Lee, Woosub Youm, Gunn Hwang
  • Patent number: 9362783
    Abstract: Provided is a wireless power transmission apparatus. The apparatus includes an ultrasound transmitter generating an ultrasound signal in response to an external source voltage and transmitting the generated ultrasound signal to a medium layer and an ultrasound receiver receiving the ultrasound signal through the medium layer and converting the received ultrasound signal into a driving voltage. The ultrasound transmitter and receiver are manufactured to control impedance values thereof to be matched with each other and a distance between the ultrasound transmitter and receiver is controlled according to predetermined distance conditions.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: June 7, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Q Lee, Gunn Hwang, WooSub Youm
  • Publication number: 20160146760
    Abstract: The inventive concept relates to a device that detects a leak of a liquid leaked from a sinkhole, water pipe or oil pipeline under the ground. In the detection device of the inventive concept, a plurality of reception devices disposed on the surface of the earth simultaneously receive an ultrasonic signal transmitted from a transmission device under the ground and a radio frequency (RF) signal synchronized with the ultrasonic signal. Also, by measuring an arrival time of the ultrasonic signal by using the wireless signal received by each reception device as a triggering signal, a leak range of a liquid leaked from a sinkhole, water pipe or oil pipeline on a signal path between the transmission device and the reception device is detected.
    Type: Application
    Filed: November 23, 2015
    Publication date: May 26, 2016
    Inventors: Gunn HWANG, Sung Q LEE, WooSub YOUM
  • Patent number: 9240688
    Abstract: Disclosed are ultrasonic wireless power transmitter and receiver apparatuses, and a method for wireless charging thereof.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: January 19, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gunn Hwang, Sung Q Lee, Woo Seok Yang, JongDae Kim
  • Patent number: 9093633
    Abstract: Provided is an ultrasonic apparatus. The ultrasonic apparatus may include a charging device, a circuit device electrically connected to the charging device, and a housing part for packaging the charging device and the circuit device. Here, the charging device may include a lower electrode, an upper electrode provided on the lower electrode, a plurality of pillar-shaped piezoelectric composites provided between the lower and upper electrodes, and an electrolyte layer provided between the lower and upper electrodes to fill spaces between the pillar-shaped piezoelectric composites.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: July 28, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gunn Hwang, WooSub Youm, Sung Q Lee
  • Publication number: 20150207357
    Abstract: Provided is a wireless power transmission system. The wireless power transmission system includes a power supply unit generating amplified power; a wireless power transmission unit receiving and converting the amplified power into wireless power; a wireless power reception unit receiving and converting the wireless power into charging power; and a charging unit receiving the charging power, wherein the charging unit includes a battery to store the charging power and the power supply unit includes a power detection unit identifies the charged state of the battery based on the amplified voltage and amplified current of the amplified power.
    Type: Application
    Filed: July 18, 2014
    Publication date: July 23, 2015
    Inventors: WooSub YOUM, Sung Q LEE, Gunn HWANG
  • Patent number: 9030917
    Abstract: Disclosed is a system of transferring wireless power using an ultrasonic wave, including: an ultrasonic wave generating device converting and transferring electric energy to an ultrasonic wave; and an ultrasonic wave receiving device receiving the ultrasonic wave to convert the ultrasonic wave to electric energy, wherein the ultrasonic wave generating device includes a radiation plate with a plurality of ultrasonic elements and controls an effective area of the radiation plate by turning on/off the plurality of ultrasonic elements so that the ultrasonic wave receiving device is disposed at a position minimizing dispersion effect due to a circular radiation of the ultrasonic wave.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: May 12, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Q Lee, Gunn Hwang
  • Publication number: 20150003207
    Abstract: Provided is a wireless power transmission apparatus. The apparatus includes an ultrasound transmitter generating an ultrasound signal in response to an external source voltage and transmitting the generated ultrasound signal to a medium layer and an ultrasound receiver receiving the ultrasound signal through the medium layer and converting the received ultrasound signal into a driving voltage. The ultrasound transmitter and receiver are manufactured to control impedance values thereof to be matched with each other and a distance between the ultrasound transmitter and receiver is controlled according to predetermined distance conditions.
    Type: Application
    Filed: February 27, 2014
    Publication date: January 1, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Q. LEE, Gunn HWANG, WooSub YOUM
  • Publication number: 20140167564
    Abstract: Provided is an ultrasonic apparatus. The ultrasonic apparatus may include a charging device, a circuit device electrically connected to the charging device, and a housing part for packaging the charging device and the circuit device. Here, the charging device may include a lower electrode, an upper electrode provided on the lower electrode, a plurality of pillar-shaped piezoelectric composites provided between the lower and upper electrodes, and an electrolyte layer provided between the lower and upper electrodes to fill spaces between the pillar-shaped piezoelectric composites.
    Type: Application
    Filed: July 8, 2013
    Publication date: June 19, 2014
    Inventors: Gunn HWANG, WooSub YOUM, Sung Q LEE
  • Patent number: 8638110
    Abstract: There is provided a high resolution circuit for converting a capacitance-to-time deviation including a capacitance deviation detecting unit generating two detection signals having a phase difference corresponding to variations of capacitance of an micro electro mechanical system (MEMS) sensor; a capacitance deviation amplifying unit dividing frequencies of the two detection signals to amplify the phase difference corresponding to the capacitance deviation; and a time signal generating unit generating a time signal having a pulse width corresponding to the amplified phase difference.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: January 28, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Sik Lee, Myung Lae Lee, Gunn Hwang, Chang Auck Choi
  • Patent number: 8613287
    Abstract: An apparatus for preventing stiction of a three-dimensional MEMS (microelectromechanical system) microstructure, the apparatus including: a substrate; and a plurality of micro projections formed on a top surface of the substrate with a predetermined height in such a way that a cleaning solution flowing out from the microstructure disposed thereabove is discharged.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: December 24, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chang Han Je, Myung Lae Lee, Sung Hae Jung, Gunn Hwang, Chang Auck Choi
  • Publication number: 20130271088
    Abstract: Disclosed are ultrasonic wireless power transmitter and receiver apparatuses, and a method for wireless charging thereof.
    Type: Application
    Filed: November 7, 2012
    Publication date: October 17, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Gunn HWANG, Sung Q LEE, Woo Seok YANG, JongDae KIM
  • Patent number: 8490683
    Abstract: There is provided a flat plate type micro heat transport device formed of two plates coupled with each other to be opposite to each other, each of the plates includes: a reservoir formed to store a moving fluid charged via an inlet; a evaporator formed separated from the reservoir to generate vapor having latent heat by vaporizing the moving fluid; a vapor flow path formed to be connected to the evaporator, through which the vapor having latent heat is transported; a condenser formed to be connected to the vapor flow path and to condense the vapor having latent heat; and a liquid flow path formed to be connected to the condenser and the evaporator and separately from the vapor flow path to transport a liquid obtained by condensing the vapor. The device may efficiently control heat with respect to portable electronic devices by effectively transporting heat generated by a heat source.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: July 23, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seok Hwan Moon, Gunn Hwang
  • Publication number: 20130028055
    Abstract: Disclosed is a high directive ultrasonic transducer that can concentrate a radiated ultrasonic wave in one direction by making an orientation angle of the radiated ultrasonic wave small in an ultrasonic transducer having a planar radiation plate structure, which has high radiation efficiency in an air medium. The high directive ultrasonic transducer according to the present disclosure includes a planar radiation plate configured to radiate an ultrasonic wave into a medium; a driving unit configured to vibrate the radiation plate in a higher order mode of a secondary order or more by applying predetermined force to a bottom surface of the radiation plate; and a matching layer formed in a height corresponding to 1/4 of an ultrasonic wavelength in the medium, in a part having a positive vibration velocity on a top surface of the radiation plate.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 31, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Q LEE, Gunn Hwang