Patents Assigned to Pukyong National University Industry-University Cooperation Foundation
  • Patent number: 9859001
    Abstract: A method for switching a memory resistance, including: changing a memory resistance of an oxide thin film of a semiconductor device by irradiating a near-infrared laser beam onto the oxide thin film, the semiconductor device having the oxide thin film formed on a substrate and two terminals formed at both ends of the oxide thin film.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: January 2, 2018
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Yongwook Lee, Jihoon Kim
  • Publication number: 20170368746
    Abstract: Disclosed is a device for manufacturing a skin-simulating phantom, which has properties that are similar to those of real skin, using a 3D printer so that layers are stacked to form a multi-layered structure and a nozzle tip connected to the 3D printer is used to provide roughness, and a method of manufacturing a skin-simulating phantom using the same. According to this present invention, solutions can be mixed, depending on the component constitution reflecting the optical properties of the skin, using a program that is set depending on the type of skin. The output condition of the 3D printer can be controlled using a program that is set so as to conduct a step of comparing measured thickness and roughness values to those of the real skin and performing feedback. The nozzle tip connected to the 3D printer can move up and down to provide roughness. Further, the multi-layered structure can be manufactured using the 3D printer, thereby outputting and embodying lesions.
    Type: Application
    Filed: April 5, 2016
    Publication date: December 28, 2017
    Applicants: KOREA PHOTONICS TECHNOLOGY INSTITUTE, PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Byeong-il LEE, Hyun Wook KANG, Hanna KIM
  • Patent number: 9791630
    Abstract: An apparatus for discriminating bacteria types using optical scattering patterns is disclosed. The apparatus includes an optical fiber for transferring light emitted from a light source, a lens for controlling a width of the light received from the optical fiber, a linear polarizer for transmitting the light passing through the lens and a bacterial colony, and a capturing unit for capturing an optical scattering pattern of the light transmitted through the linear polarizer.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: October 17, 2017
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Yongwook Lee, Junghwan Oh, Hyunwook Kang, Seungyun Nam, Youngmog Kim, Junhyeog Jeong
  • Patent number: 9595638
    Abstract: The present invention relates to a nitride light emitting diode (LED) package, and more specifically, to a nitride light emitting diode package which can improve light-emitting efficiency by increasing light emitting surface area, reduce operating voltage by simultaneously emitting light from six cells at once, and can increase operating current.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: March 14, 2017
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Hyung Soo Ahn, Min Yang, Kee Sam Shin, Sam Nyung Yi, Hyo Jong Lee, Moon Yeoung Yu
  • Patent number: 9581515
    Abstract: Disclosed is an optical fiber pressure sensor including: a polarization beam splitter that splits input light from a broadband light source into two beams; a polarization controller through which vertically and horizontally polarized light coming out of the polarization beam splitter pass; a pressure chamber in which the polarization beam splitter and the polarization controller may be placed; and an optical spectrum analyzer into which vertically and horizontally polarized light passing through the polarization controller and getting out of the polarization beam splitter is introduced, wherein the pressure chamber includes a polarization-maintaining fiber and an optical fiber Bragg grating.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: February 28, 2017
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Yong Wook Lee, Tae Kyu Noh
  • Publication number: 20170038289
    Abstract: An apparatus for discriminating bacteria types using optical scattering patterns is disclosed. The apparatus includes an optical fiber for transferring light emitted from a light source, a lens for controlling a width of the light received from the optical fiber, a linear polarizer for transmitting the light passing through the lens and a bacterial colony, and a capturing unit for capturing an optical scattering pattern of the light transmitted through the linear polarizer.
    Type: Application
    Filed: August 1, 2016
    Publication date: February 9, 2017
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Yongwook LEE, Junghwan OH, Hyunwook KANG, Seungyun NAM, Youngmog KIM, Junhyeog JEONG
  • Publication number: 20160370437
    Abstract: Embodiments of a synthetic test circuit for a valve performance test of high-voltage direct current (HVDC) are presented. In some embodiments, the synthetic test circuit comprises a resonance circuit configured to comprise a first test valve to test an operation of an inverter mode and a second test valve to test an operation of a rectifier mode. The synthetic test circuit may comprise a power supply (P/S) configured to provide the resonance circuit with an operating voltage. The synthetic test circuit may comprise a direct current/direct current (DC/DC) converter configured to bypass a DC offset current of the resonance circuit. The first test valve may be an inverter unit, which may have a positive DC current offset. Further, the second test valve may be a rectifier unit, which may have a negative DC current offset.
    Type: Application
    Filed: June 20, 2016
    Publication date: December 22, 2016
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Seung Taek BAEK, Eui Cheol NHO, Jae Hun JUNG, Jin Hee LEE, Yong Ho CHUNG
  • Patent number: 9507092
    Abstract: An optical fiber flexible multi-wavelength filter based on a polarization-diversity loop includes a pair of high-birefringence optical fibers, a polarization beam splitter connected to the pair of high-birefringence optical fibers and dividing light incident from a broadband light source into two polarized beams, and a polarization controller connected to the high-birefringence optical fibers or the polarization beam splitter and controlling the two polarized beams divided by the polarization beam splitter. The polarization controller includes a ½ wave plate or a ¼ wave plate, and the polarization controller disposed between the high-birefringence optical fibers controls an angle difference between principal axes of the high-birefringence optical fibers and visibility. Interference in the high-birefringence optical fibers is controlled via changing polarized light incident from the broadband light source using the polarization controller.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: November 29, 2016
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Yong Wook Lee, Kyoung Soo Park
  • Publication number: 20160193684
    Abstract: To achieve the above, the present invention provides a forming and feeding device of a filler metal for TIG welding which presses a filler metal of plane shape to form as curved cross-section which includes a case; a guide member installed on a front part of the case to guide the filler metal; a rotation roller revolving by a motor to feed the filler metal with supporting a lower surface of the filler metal, the filler metal guided by the guide member; a press roller located over the rotation roller to press a upper surface of the filler metal which is in contact with the rotation roller; and a press member pressing the press roller.
    Type: Application
    Filed: December 3, 2013
    Publication date: July 7, 2016
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Sang-Myung Cho, Jae-Ho Jun, Jae-Gyu Byun
  • Patent number: 9222065
    Abstract: The present invention relates to a method for photoculturing and harvesting microalgae, and more particularly to a method for photoculturing and harvesting microalgae, in which a light emitting diode (LED) is used as a light source to increase the efficiency with which microalgae are cultured, and the cultured microalgae are harvested using a natural polymer flocculant and air microbubbles so that the operating cost is reduced and the range of application of microalgae is expanded, and also a semi-continuous culture method is applied so that the maximum concentration of microalgae can be produced again within a short time, even though the amount of microalgae harvested is small.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 29, 2015
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Tae yoon Lee, Jun-Heok Lim, Jea-Keun Lee
  • Patent number: 8902615
    Abstract: The present disclosure relates to a load-segmentation-based 3-level inverter and method for controlling same. Three-level inverter includes: multiple capacitors charged with voltages divided from a DC input voltage; top switch having one end connected with positive terminal of one of multiple capacitors; bottom switch having one end connected with negative terminal of one of multiple capacitors; multiple legs each including a first switch connected to the other end of top switch and a second switch connected to the other end of bottom switch with the first and second switches connected; multiple diodes connected in series forwardly from the other end of bottom switch to the other end of top switch and having interconnect points connected to a contact between the multiple capacitors; and multiple loads having connected terminals at a contact between the first and second switches of each of the legs and a contact between the multiple diodes.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: December 2, 2014
    Assignees: Pukyong National University Industry-University Cooperation Foundation, Korea Advanced Institute of Science and Technology
    Inventors: Seongjeub Jeon, Dongho Cho, Chuntaek Rim, Guho Jeong
  • Patent number: 8889563
    Abstract: An aspect of the invention is to provide a method and apparatus for etching the silicon oxide layer of a semiconductor substrate, whereby the processing time for cleaning or rinsing, as well as any undesired aftereffects by residual hydrofluoric acid, may be reduced, in using the dry etching method involving the use of dense carbon dioxide that contains hydrofluoric acid, during the manufacturing process of a micro-electronic device.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: November 18, 2014
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventor: Kwon-Taek Lim
  • Patent number: 8873897
    Abstract: An optical fiber multi-wavelength filter based on a polarization-diversity loop configuration within which polarization-maintaining fibers are contained with some optical elements is disclosed. The filter includes a coil heater adjacent to polarization-maintaining fibers. An ambient temperature of the polarization-maintaining fiber is controlled by adjusting a current applied to the coil heater.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 28, 2014
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventor: YongWook Lee
  • Patent number: 8842944
    Abstract: An optical fiber hydrogen sensor and a method of measuring a hydrogen concentration are provided. The optical fiber hydrogen sensor may include a light source, a polarization beam splitter connected to the light source to split light from the light source into two polarization beams, a high-birefringence optical fiber connected to the polarization beam splitter and coated with a hydrogen reactant, and an optical spectrum analyzer connected to the polarization beam splitter to measure interference spectrum generated at the high-birefringence optical fiber.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 23, 2014
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventors: YongWook Lee, Wook Jang
  • Publication number: 20140242019
    Abstract: There is provided a new use of a hydroxydihydrobovolide compound having effects on preventing hair loss and growing hairs. Since the hydroxydihydrobovolide compound has effects on increasing survival rates of human hair follicle dermal papilla cells and hair outer root sheath cells and also growing a length of hairs, the compound is of great value as a pharmaceutical composition or cosmetic composition for improving scalp or preventing hair loss. Further, since the hydroxydihydrobovolide compound is isolated and purified from Eucheuma cottonii that is red algae and does not induce cytotoxicity, it is stable in the body and thus can be used as a raw material for functional health food.
    Type: Application
    Filed: December 16, 2013
    Publication date: August 28, 2014
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Se-Kwon Kim, Soon-Sun Bak, Sang-Man Lee
  • Publication number: 20140213882
    Abstract: The electrode structure for measuring a bio-signal and an apparatus for measuring an electrocardiogram using the same are disclosed. The electrode structure for measuring a bio-signal, comprises an electrode pad to measure bio-signals based on capacitive coupling between the electrode pad and human skin; an absorption layer formed at one side of the electrode pad; and a preamplifier which is electrically connected with the electrode pad and filters noise from the bio-signals from the electrode pad and amplifies and outputs the signals. Thus, the initial noise stabilization time can be reduced, and stable electrocardiogram signals can be obtained quickly without noises.
    Type: Application
    Filed: March 27, 2013
    Publication date: July 31, 2014
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventor: Pukyong National University Industry-University Cooperation Foundation
  • Publication number: 20140199738
    Abstract: A method of preparing a volatile fatty acids (VFAs) is provided. More particularly, the method includes chemically or biologically pretreating a residue of algae to obtain an extract of the algae residue, filtering the extract of the algae residue and anaerobically fermenting the filtrate. The method of preparing VFAs can be used regardless of the kinds of algae, a process of producing VFAs can be simplified since there is no need to develop an enzyme for anaerobic fermentation, and a yield of VFAs can be increased since the VFAs can be produced from different kinds of organic components such as proteins or fats in addition to carbohydrates. Accordingly, the method can be useful in producing VFAs in an economical and efficient manner.
    Type: Application
    Filed: December 16, 2011
    Publication date: July 17, 2014
    Applicant: Pukyong National University Industry- University Cooperation Foundation
    Inventors: Hee-Chul Woo, Ho-Nam Chang, Yeong-Joong Jeon, Dong-Jin Suh, Byung-Soo Chun, Kyeong-Keun Oh, Kyoung-Heon Kim, Du-Woon Kim, Jae-Hyung Choi
  • Publication number: 20140107015
    Abstract: There is provided a pharmaceutical composition for preventing or treating human immunodeficiency virus, and more particularly, to a pharmaceutical composition and health functional food for preventing or treating/improving human immunodeficiency virus, the pharmaceutical composition and health functional food including a new compound with chitooligosaccharides conjugated amino acids or dipeptides as an effective component. The new compound has an excellent anti-HIV effect through an activity of inhibiting a HIV initial infection by interrupting an interaction between host-virus membranes, and also activities of inhibiting reverse transcriptase and protease of HIV. The compound according to the present invention is a conjugate synthesized through conjugating chitooligosaccharides derived from a natural material with amino acids or dipeptides. The compound is stable without cytotoxicity.
    Type: Application
    Filed: November 13, 2012
    Publication date: April 17, 2014
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Se-Kwon KIM, Fatih KARADENIZ
  • Publication number: 20140094414
    Abstract: There is provided a new use of protein hydrolysates and peptide derived from seahorses for preventing or treating a neurodegenerative disease, and more particularly a composition and health functional foods for preventing or treating a neurodegenerative disease including seahorse protein hydrolysates or peptide isolated and purified from the same as an effective component.
    Type: Application
    Filed: October 31, 2012
    Publication date: April 3, 2014
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Se-Kwon KIM, Ratih PANGESTUTI
  • Publication number: 20140072650
    Abstract: Disclosed is an antihypertensive composition containing as an active ingredient a gelatin extract made from the skins of a skate ray and a peptide isolated from the extract. The present invention is directed to a pharmaceutical composition for a hypertension prevention and therapy containing as an active ingredient a hydrolysate of a gelatin extract isolated from the skins of a skate ray, a method for preparing a hydrolysate of a gelatin extract made from the skins of a skate ray, and the use of a new peptide having an antihypertensive activity isolated and purified from the hydrolysate.
    Type: Application
    Filed: October 31, 2012
    Publication date: March 13, 2014
    Applicant: Pukyong National University Industry-University Cooperation Foundation
    Inventors: Se-Kwon KIM, Bo-Mi RYU