Patents by Inventor Won-ju Choi

Won-ju Choi 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: 20240168307
    Abstract: Disclosed is a polarized light generating device based on an optical waveguide, which includes first to fourth input optical waveguides, respectively, for receiving input light from an outside, first to fifth optical splitters configured to receive at least one light and output the received at least one light as at least one light, and an optical converter configured to receive at least one light from the fifth optical splitter and convert the received light to generate polarized light. The polarized light generating device receives the input light through one of the first to fourth input optical waveguides, and generates a first polarized light, a second polarized light, a third polarized light, and a fourth polarized light. The first to fourth polarized lights belong to elements of two arbitrary two-dimensional mutually unbiased basis sets.
    Type: Application
    Filed: November 21, 2023
    Publication date: May 23, 2024
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Joong KIM, Chun Ju Youn, Young-Ho Ko, Minchul Kim, Seong Su Park, Kyongchun Lim, Byung-seok Choi, Joong-Seon Choe, Won Seok Han
  • Publication number: 20240147677
    Abstract: A lower module of a power electronic device includes a lower module included in a power electronic device that is divided into an upper module and a lower module by an intermediate plate and comprises a blower fan to introduce air into the inner space of the lower module; a plurality of capacitors installed in a suspended form on the intermediate plate and spaced apart from the blower fan; a heat sink having a plurality of heat dissipation fins through which heat generated from a heating component disposed on the upper module is conducted, and disposed adjacent to the capacitors to cool the plurality of heat dissipation fins by air moved from the plurality of capacitors; a DC reactor cooled by the air moved from the heat dissipation fins; and a discharge plate having a vent hole to discharge the air moved from the DC reactor to the outside.
    Type: Application
    Filed: December 3, 2021
    Publication date: May 2, 2024
    Inventors: Soo Yong HWANG, Kil Ju JUNG, Su Hyeong LEE, Won Suk CHOI, Kyu Hwa KIM
  • Patent number: 11958396
    Abstract: A hidden type holder device includes: a stationary assembly, a movable assembly, and a first return spring, the movable assembly is accommodated in the stationary assembly and movable to the inside or outside of the stationary assembly, the movable assembly has a retractable holder assembly for accommodating an article, and two opposite end portions of the return spring are respectively mounted on the stationary assembly and the movable assembly.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: April 16, 2024
    Assignees: Hyundai Motor Company, Kia Corporation, Nifco Korea Inc., Seoyon E-Hwa Co., Ltd.
    Inventors: Chun Lei Sang, Cheng Kun Li, Won Young Bae, Bong Ju Choi, Dae Kyo Kim
  • Publication number: 20240088432
    Abstract: An embodiment sulfur dioxide-based inorganic electrolyte is provided in which the sulfur dioxide-based inorganic electrolyte is represented by a chemical formula M·(A1·Cl(4-x)Fx)z·ySO2. In this formula, M is a first element selected from the group consisting of Li, Na, K, Ca, and Mg, A1 is a second element selected from the group consisting of Al, Fe, Ga, and Cu, x satisfies a first equation 0?x?4, y satisfies a second equation 0?y?6, and z satisfies a third equation 1?z?2.
    Type: Application
    Filed: April 12, 2023
    Publication date: March 14, 2024
    Inventors: Kyu Ju Kwak, Won Keun Kim, Eun Ji Kwon, Samuel Seo, Yeon Jong Oh, Kyoung Han Ryu, Dong Hyun Lee, Han Su Kim, Ji Whan Lee, Seong Hoon Choi, Seung Do Mun
  • Patent number: 11925059
    Abstract: An organic light emitting diode display device includes a substrate having an emitting area and a non-emitting area. An insulating layer is on the substrate, and the insulating layer includes a plurality of convex portions, a plurality of connecting portions and at least one wall in the emitting area. A height of the at least one wall is greater than a height of the plurality of convex portions. A first electrode is on the substream, emitting layer is on the first electrode, a second electrode is on the emitting layer. The first electrode, the emitting layer and the second electrode constitute a light emitting diode.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 5, 2024
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun-Soo Lim, Kang-Ju Lee, Soo-Kang Kim, Won-Hoe Koo, Min-Geun Choi
  • Patent number: 11329250
    Abstract: A display device includes: a display panel including a front surface and a rear surface, the rear side being opposite to the front side; a front stacked structure on the front surface including a front bonding member disposed on the front surface; and a rear stacked structure on the rear surface including a rear bonding member disposed on the rear surface. A loss tangent of the front bonding member has a value greater than a loss tangent of the rear bonding member, the loss tangent being represented by an equation: (loss tangent)=(loss modulus)/(storage modulus), wherein the loss modulus refers to energy lost by viscosity of a material, and the storage modulus refers to energy stored without loss by elasticity of the material.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: May 10, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ju Hee Song, Sang Hyo Park, Byoung Su Lee, Tae Hyeog Jung, Won Ju Choi
  • Publication number: 20210036259
    Abstract: A display device includes: a display panel including a front surface and a rear surface, the rear side being opposite to the front side; a front stacked structure on the front surface including a front bonding member disposed on the front surface; and a rear stacked structure on the rear surface including a rear bonding member disposed on the rear surface. A loss tangent of the front bonding member has a value greater than a loss tangent of the rear bonding member, the loss tangent being represented by an equation: (loss tangent)=(loss modulus)/(storage modulus), wherein the loss modulus refers to energy lost by viscosity of a material, and the storage modulus refers to energy stored without loss by elasticity of the material.
    Type: Application
    Filed: June 29, 2020
    Publication date: February 4, 2021
    Inventors: Ju Hee SONG, Sang Hyo PARK, Byoung Su LEE, Tae Hyeog JUNG, Won Ju CHOI
  • Patent number: 8458266
    Abstract: A decentralized scheduling method in a wireless ad hoc network is provided which includes grouping nodes in the network cluster by cluster, determining a cluster head of each cluster, and sequentially performing scheduling cluster by cluster. Accordingly, it is possible to provide an efficient cluster-based scheduling method which quickly adapts to changes and reduces power consumption.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: June 4, 2013
    Assignees: Electronics and Telecommunications Research Institute, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Wun-cheol Jeong, Jong-moon Chung, Won-ju Choi, Ki-yong Jin, Min-seok Kim, Seong-soon Joo, Jong-suk Chae
  • Publication number: 20100268825
    Abstract: A decentralized scheduling method in a wireless ad hoc network is provided which includes grouping nodes in the network cluster by cluster, determining a cluster head of each cluster, and sequentially performing scheduling cluster by cluster. Accordingly, it is possible to provide an efficient cluster-based scheduling method which is quickly adapt to changes and reduces power consumption.
    Type: Application
    Filed: November 27, 2009
    Publication date: October 21, 2010
    Applicants: Electronics and Telecommunications Research Institute, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Wun-cheol JEONG, Jong-moon Chung, Won-ju Choi, Ki-yong Jin, Min-seok Kim, Seong-soon Joo, Jong-suk Chae