Patents by Inventor Tae-Woo Lee

Tae-Woo Lee 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: 10103418
    Abstract: Disclosed is a printed-circuit board (PCB) structure having an electromagnetic-tunnel-embedded architecture, the PCB structure including a PCB, and an EM-tunnel-embedded in the PCB, wherein the EM-tunnel includes a dielectric core and a metal clad which surrounds the dielectric core and has at least one port exposed to a surface of the PCB.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: October 16, 2018
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Hyo Hoon Park, Hyeon Min Bae, Tae Woo Lee
  • Patent number: 10084965
    Abstract: Omnidirectional high resolution tracking and recording apparatus and method are disclosed. The high resolution tracking and recording apparatus comprises a pan/tilt/zoom camera executable rotation and zoom-in; assistant cameras configured to have fisheye lens; microphones performable beam steering; and a processor configured to control to search a location of an important object in a recorded image by analyzing an image taken by the pan/tilt/zoom camera and the assistant cameras and a sound source recorded by the microphones, rotate the pan/tilt/zoom camera to the searched location, perform zoom-in of the pan/tilt/zoom camera, and amplify a sound occurred in a direction of a sound source by searching the direction of the sound source through preset algorithm.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 25, 2018
    Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Dong Suk Yook, Tae Woo Lee
  • Patent number: 10008685
    Abstract: An organic light emitting device includes an anode, the anode including a conductive polymer, a fluorine-containing organic material, and metal nanoparticles, a cathode facing the anode, and an emission layer between the anode and the cathode.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 26, 2018
    Assignees: Samsung Dispaly Co., Ltd., Postech Academy-Industry Foundation
    Inventors: Tae-Woo Lee, Su-Hun Jeong, Kwanhee Lee, Wonjun Song
  • Patent number: 10002626
    Abstract: A waveguide core extends from an input coupler towards a media-facing surface of a read/write head. A cap is located between a terminating end of the waveguide core and the media-facing surface. The cap is formed of a high index of refraction, high-corrosion resistant material that is different than a material used to form the waveguide core. A near-field transducer is proximate the cap in a down-track direction. A head overcoat on the media-facing surface covers the cap.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: June 19, 2018
    Assignee: Seagate Technology LLC
    Inventors: Yuhang Cheng, Chubing Peng, Tae-Woo Lee, Xiaoyue Huang, Song Chen
  • Patent number: 9934795
    Abstract: A recording head has a near-field transducer at a media-facing surface of the recording head and a write pole on a first side of the near field transducer. A first coil induces a first flux in the write pole. The recording head includes a shield on a second side of the near-field transducer that faces away from the first side. A second coil is proximate the shield and induces a second flux in the shield that controls a field angle of the first flux.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: April 3, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Kirill Aleksandrovich Rivkin, Mourad Benakli, Hua Zhou, Huaqing Yin, Tae-Woo Lee
  • Publication number: 20180072169
    Abstract: A charging method and an apparatus of an electric vehicle are provided. The charging is executed via connection even between an electric vehicle and a charger that employ different charging methods, irrespective of a charging method of a charger. The apparatus includes a gender converter that is connected between a vehicle inlet and a charger connector according to one of a DC combo standard specification charger and a CHAdeMO standard specification charger to supply DC power for battery charging, communication, and ground connection between a connected charger and the vehicle. A controller determines specifications of the charger connected to the vehicle inlet from a signal transmitted from the charger and executes high-speed charging according to specifications of the connected charger to perform high-speed charging of a vehicle battery with DC power supplied from the charger.
    Type: Application
    Filed: December 9, 2016
    Publication date: March 15, 2018
    Inventors: Tae Woo Lee, Jin Cheol Shin
  • Patent number: 9916851
    Abstract: Embodiments described herein involve a method comprising generating a seek command in a heat-assisted magnetic recording (HAMR) device. A first current is supplied to a laser diode of the HAMR device in response to the seek command to preheat the laser diode. The first current is insufficient to cause erasure of data on media of the HAMR device. A second current that is greater than the first current is supplied to the laser diode for writing to a magnetic recording medium of the HAMR device after executing the seek command. Preheating the laser diode reduces a likelihood of a laser mode hop occurring while writing to the medium.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: March 13, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael Allen Seigler, Zoran Jandric, Tae-Woo Lee
  • Patent number: 9905253
    Abstract: An apparatus includes a near-field transducer (NFT) of a heat-assisted magnetic recording head. The NFT includes a substantially C-shaped portion and a peg portion extending from the substantially C-shaped portion. A planar member is disposed adjacent the NFT. The planar member includes a bottom surface configured to support surface plasmon polaritons (SPPs) that resonantly excite the NFT. A barrier member is installed within the planar member and is arranged to encompass at least a tip portion of the peg.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: February 27, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventor: Tae-Woo Lee
  • Publication number: 20180053520
    Abstract: Devices having an air bearing surface (ABS), the devices including a write pole; a near field transducer (NFT) that includes a peg and a disc, wherein the peg is at the ABS of the device; a heat sink positioned adjacent the disc of the NFT; a dielectric gap positioned adjacent the peg of the NFT at the ABS of the device; and a conformal diffusion barrier layer positioned between the write pole and the dielectric gap, the disc, and the heat sink, wherein the conformal diffusion barrier layer forms at least one angle that is not greater than 135°.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 22, 2018
    Inventors: Sarbeswar Sahoo, Martin Blaber, Hui Brickner, Tong Zhao, Yuhang Cheng, John Duda, Tae-Woo Lee
  • Publication number: 20170369986
    Abstract: A method of manufacturing a copper thin film using a single-crystal copper target, and more particularly, a method of manufacturing a copper thin film using a single-crystal copper target, wherein a copper thin film is deposited on a sapphire disk substrate through high-frequency sputtering using a single-crystal copper target grown through a Czochralski process, and may thus exhibit high quality in terms of crystallinity. The method includes depositing a copper thin film on a sapphire disk substrate through a high-frequency sputtering process using a disk-shaped single-crystal copper target obtained by cutting cylindrical single-crystal copper grown through a Czochralski process.
    Type: Application
    Filed: September 6, 2017
    Publication date: December 28, 2017
    Inventors: Se-young Jeong, Ji-young Kim, Seung-hun Lee, Tae-woo Lee, Sang-eon Park, Chae-ryong Cho
  • Publication number: 20170369772
    Abstract: Provided are a method for manufacturing a perovskite nanocrystal particle light-emitter where an organic ligand is substituted, a light-emitter manufactured thereby, and a light emitting device using the same. A method for manufacturing an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter where an organic ligand is substituted may comprise the steps of: preparing a solution including an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter, wherein the organic-inorganic-hybrid perovskite nanocrystal particle light-emitter comprises an organic-inorganic-hybrid perovskite nanocrystal structure and a plurality of first organic ligands surrounding the organic-inorganic-hybrid perovskite nanocrystal structure; and adding, to the solution, a second organic ligand which is shorter than the first organic ligands or includes a phenyl group or a fluorine group, thereby substitutes the first organic ligands with the second organic ligand.
    Type: Application
    Filed: November 6, 2015
    Publication date: December 28, 2017
    Inventors: Tae-Woo LEE, Sanghyuk IM, Young-Hoon KIM, Himchan CHO
  • Publication number: 20170358757
    Abstract: Provided are perovskite nanocrystalline particle and an optoelectronic device using the same. The perovskite nanocrystalline particle may include a perovskite nanocrystalline structure while being dispersible in an organic solvent. Accordingly, the perovskite nanocrystalline particle in accordance with the present invention has therein a perovskite nanocrystal having a crystalline structure in which FCC and BCC are combined; forms a lamellar structure in which an organic plane and an inorganic plane are alternately stacked; and can show high color purity since excitons are confined to the inorganic plane. In addition, the perovskite nanocrystalline particle have a particle size greater than or equal to a Bohr diameter beyond a quantum confinement effect, and simultaneously can implement high emission efficiency and emission wavelength which is almost not dependent on particle size.
    Type: Application
    Filed: November 6, 2015
    Publication date: December 14, 2017
    Inventors: Tae-Woo LEE, Sanghyuk IM, Young-Hoon KIM, Himchan CHO
  • Publication number: 20170358758
    Abstract: Provided are an organic-inorganic-hybrid perovskite nanocrystal particle light-emitter having a two-dimensional structure, a method for producing the same, and a light emitting device using the same. The organic-inorganic-hybrid perovskite nanocrystal particle light-emitter having a two-dimensional structure comprises an organic-inorganic-hybrid perovskite nanocrystal structure having a two-dimensional structure which can be dispersed in an organic solvent. Accordingly, the nanocrystal particle light-emitter comprises an organic-inorganic-hybrid perovskite nanocrystal having a crystal structure combining FCC and BCC; forms a lamellar structure where organic planes and inorganic planes are accumulated in an alternating manner; and can exhibit high color purity by confining excitons in the inorganic planes.
    Type: Application
    Filed: November 6, 2015
    Publication date: December 14, 2017
    Inventors: Tae-Woo LEE, Sanghyuk IM, Young-Hoon KIM, Himchan CHO
  • Publication number: 20170358759
    Abstract: Provided are: a light-emitting layer for a perovskite light-emitting device; a method for manufacturing the same; and a perovskite light-emitting device using the same. The method of the present invention for manufacturing a light-emitting layer for an organic and inorganic hybrid perovskite light-emitting device comprises a step of forming a first nanoparticle thin film by coating, on a member for coating a light-emitting layer, a solution comprising organic and inorganic perovskite nanoparticles including an organic and inorganic perovskite nanocrystalline structure. Thereby, a nanoparticle light emitter has therein an organic and inorganic hybrid perovskite having a crystalline structure in which FCC and BCC are combined; forms a lamella structure in which an organic plane and an inorganic plane are alternatively stacked; and can show high color purity since excitons are confined to the inorganic plane.
    Type: Application
    Filed: November 6, 2015
    Publication date: December 14, 2017
    Inventors: Tae-Woo LEE, Sanghyuk IM, Himchan CHO, Young-Hoon KIM
  • Patent number: 9837112
    Abstract: An apparatus is includes a near field transducer positioned adjacent a media-facing surface and at the end of a waveguide having at least one core layer and a cladding layer. The apparatus also includes at least one optical reflector positioned adjacent opposing cross-track edges of the near field transducer and/or adjacent a down-track side of the near-field transducer.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: December 5, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Ruoxi Yang, James Gary Wessel, Rachel Frakie, Chubing Peng, Werner Scholz, Chris Rea, Zoran Jandric, Mourad Benakli, Tae-Woo Lee
  • Patent number: 9792931
    Abstract: Devices having an air bearing surface (ABS), the devices including a write pole; a near field transducer (NFT) that includes a peg and a disc, wherein the peg is at the ABS of the device; a heat sink positioned adjacent the disc of the NFT; a dielectric gap positioned adjacent the peg of the NFT at the ABS of the device; and a conformal diffusion barrier layer positioned between the write pole and the dielectric gap, the disc, and the heat sink, wherein the conformal diffusion barrier layer forms at least one angle that is not greater than 135°.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 17, 2017
    Assignee: Seagate Technology LLC
    Inventors: Sarbeswar Sahoo, Martin Blaber, Hui Brickner, Tong Zhao, Yuhang Cheng, John Duda, Tae-Woo Lee
  • Patent number: 9759863
    Abstract: A waveguide a core extending along a light propagation and a coupling layer adjacent one side of the core along the light propagation direction. A gradient index material is adjacent to at least one side of the coupling layer. The gradient index material has a first refractive index proximate the coupling layer and a second refractive index away from the coupling layer. The gradient index material is configured to direct light from an input facet to the core layer.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: September 12, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Chubing Peng, Mark Ostrowski, Chang Xie, Tae-Woo Lee, Lisa M. Hanson
  • Publication number: 20170222162
    Abstract: Provided are a metal halide perovskite light emitting device and a method of manufacturing the same. The metal halide perovskite light emitting device includes a substrate, a first electrode formed on the substrate, a light emitting layer formed on the first electrode and including a metal halide perovskite material, and a second electrode disposed on the light emitting layer, the first electrode includes a conductive layer and a surface energy-tuning layer disposed on the conductive layer, the conductive layer includes a conductive polymer and a first fluorine-based material, and the surface energy-tuning layer includes a second fluorine-based material but does not include the conductive polymer. Therefore, the first electrode can come in ohmic contact with a metal halide perovskite light emitting layer by adjusting a work function, and can prevent the dissociation of excitons to enhance luminous efficiency, thereby effectively improving efficiency of a light emitting device.
    Type: Application
    Filed: December 8, 2016
    Publication date: August 3, 2017
    Inventors: Tae-Woo LEE, Su-Hun JEONG
  • Publication number: 20170207510
    Abstract: Disclosed is a printed-circuit board (PCB) structure having an electromagnetic-tunnel-embedded architecture, the PCB structure including a PCB, and an EM-tunnel-embedded in the PCB, wherein the EM-tunnel includes a dielectric core and a metal clad which surrounds the dielectric core and has at least one port exposed to a surface of the PCB.
    Type: Application
    Filed: February 12, 2016
    Publication date: July 20, 2017
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Hyo Hoon Park, Hyeon Min Bae, Tae Woo Lee
  • Patent number: 9685202
    Abstract: A near-field transducer includes an enlarged portion and a peg protruding from a first edge. The enlarged portion has a second edge facing away from the first edge. The near-field transducer includes a heat sink disposed on the enlarged portion and with an outline shape that matches that of the enlarged portion. The heat sink is disposed at a first separation distance from the first edge of the enlarged portion and a second, greater, separation distance from the second edge of the enlarged portion. The first separation distance is greater than the second separation distance.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: June 20, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: John Charles Duda, Scott M. Franzen, Weibin Chen, Tae-Woo Lee, Dimitar V. Dimitrov, Huaqing Yin