Patents by Inventor Tae Jun Yu

Tae Jun Yu 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: 20250102286
    Abstract: Disclosed is a secondary battery including a case configured to surround an exterior of an electrode assembly, and a strain sensor attached to an exterior of the case to detect deformation of the case. The strain sensor may include a backing part attached to the exterior of the case; a strain gauge installed on the backing part and formed of single-crystal silicon; a wiring part stacked on the backing part, along with the strain gauge, and electrically connected to the strain gauge; and an encapsulation part fixed to the backing part while surrounding the strain gauge and the wiring part excluding a portion of the wiring part.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 27, 2025
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Jong Chan Han, Gi Young Kim, Ki Jun Yu, Tae Min Kim, Kyu Been Kim
  • Patent number: 10870170
    Abstract: A beam homogenizer for surface modification comprises: a first lens array configured to split a laser beam, irradiated from a laser beam irradiation unit, into a plurality of beamlets; a second lens array configured to transmit the plurality of beamlets and comprising a plurality of lenslets corresponding to the first lens array; and a focusing lens configured to focus the plurality of beamlets, transmitted through the second lens array, onto a surface of a target. The beam homogenizer further comprises: a plasma generation-preventing unit disposed between the first and second lens arrays and configured to prevent plasma from being generated in the focal zone of the beamlets; or a damage-preventing unit disposed between the focusing lens and the target and configured to prevent the focusing lens from being damaged by energy generated when the plurality of beamlets is irradiated onto the target.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: December 22, 2020
    Assignee: HANDONG GLOBAL UNIVERSITY FOUNDATION
    Inventors: Tae Jun Yu, Kyung Hee Hong, Tae Shin Kim, Seung Jin Hwang, Yoong Wook Sin
  • Publication number: 20190305501
    Abstract: A laser output device includes: a laser oscillator for oscillating a source laser pulse; a pulse extender for temporally extending the source laser pulse oscillated by the laser oscillator; an amplifier for amplifying the laser pulse temporally extended by the pulse extender; the laser pulse filter for filtering a pre-pulse and a post-pulse contained in the amplified laser pulse; and a pulse compressor for temporally compressing the laser pulse which has passed through the laser pulse filter.
    Type: Application
    Filed: July 11, 2017
    Publication date: October 3, 2019
    Applicant: HANDONG GLOBAL UNIVERCITY INDUSTRYACADEMIC COOPERATION FOUNDATION
    Inventors: Tae Jun YU, Jihoon JEONG, Tae Shin KIM, Seryeyohan CHO, Seung Jin HWANG
  • Publication number: 20190039179
    Abstract: A beam homogenizer for surface modification comprises: a first lens array configured to split a laser beam, irradiated from a laser beam irradiation unit, into a plurality of beamlets; a second lens array configured to transmit the plurality of beamlets and comprising a plurality of lenslets corresponding to the first lens array; and a focusing lens configured to focus the plurality of beamlets, transmitted through the second lens array, onto a surface of a target. The beam homogenizer further comprises: a plasma generation-preventing unit disposed between the first and second lens arrays and configured to prevent plasma from being generated in the focal zone of the beamlets; or a damage-preventing unit disposed between the focusing lens and the target and configured to prevent the focusing lens from being damaged by energy generated when the plurality of beamlets is irradiated onto the target.
    Type: Application
    Filed: November 14, 2016
    Publication date: February 7, 2019
    Applicant: HANDONG GLOBAL UNIVERSITY FOUNDATION
    Inventors: Tae Jun YU, Kyung Hee HONG, Tae Shin KIM, Seung Jin HWANG, Yoong Wook SIN
  • Patent number: 7701982
    Abstract: Apparatus for stabilizing carrier-envelope phase (CEP) of laser pulse generated by mode locked pulsed laser based on direct locking method includes laser oscillator, interferometer, detector and double feedback circuit. The laser oscillator includes the mode locked pulsed laser generating the laser pulse. The interferometer generates laser pulses having first and second frequency components from the laser pulse generated by the mode locked pulsed laser to generate first and second interference signals that substantially correspond to each other in time domain and space domain. The detector receives the first and second interference signals to output third and fourth interference signals by inverting phase of the second interference signal. The double feedback circuit controls the laser oscillator so that the CEP of the laser pulse generated by the mode locked pulsed laser has substantially constant value with respect to time using CEP signal obtained from the third and fourth interference signals.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: April 20, 2010
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Tae-Jun Yu, Jong-Min Lee
  • Patent number: 7630416
    Abstract: Provided is a high-repetition-rate femtosecond regenerative amplification system. The regenerative amplification system includes: a laser oscillator emitting pulses; a stretcher stretching the pulses with negative dispersion; a regenerative amplifier amplifying the pulses, the regenerative amplifier comprising an acousto-optic modulator for pulse switching, a pulsed pump laser for pumping a gain medium, a resonator for reciprocating the pulses between a plurality of mirrors, and at least one chirped mirror for providing negative dispersion; and a glass compressor compressing the pulses. Accordingly, the 100 kHz-class high-repetition-rate femtosecond regenerative amplification system can produce an output energy of tens of ?J, higher than a few ?J provided by a conventional system.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: December 8, 2009
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Kyung Han Hong, Tae Jun Yu, Do Kyeong Ko, Jong Min Lee
  • Publication number: 20090135859
    Abstract: Apparatus for stabilizing carrier-envelope phase (CEP) of laser pulse generated by mode locked pulsed laser based on direct locking method includes laser oscillator, interferometer, detector and double feedback circuit. The laser oscillator includes the mode locked pulsed laser generating the laser pulse. The interferometer generates laser pulses having first and second frequency components from the laser pulse generated by the mode locked pulsed laser to generate first and second interference signals that substantially correspond to each other in time domain and space domain. The detector receives the first and second interference signals to output third and fourth interference signals by inverting phase of the second interference signal. The double feedback circuit controls the laser oscillator so that the CEP of the laser pulse generated by the mode locked pulsed laser has substantially constant value with respect to time using CEP signal obtained from the third and fourth interference signals.
    Type: Application
    Filed: December 21, 2007
    Publication date: May 28, 2009
    Inventors: Tae-Jun Yu, Jong-Min Lee