Patents by Inventor Dong-Yoon OH
Dong-Yoon OH 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).
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Publication number: 20240129890Abstract: An indoor wireless positioning method according to one embodiment of the present invention includes receiving initial received signal strength indicator (RSSI) information from a reception unit; searching for a fingerprint matching measured initial RSSI information in a fingerprint database; determining a first location corresponding to the retrieved fingerprint to be an initial location of the reception unit; receiving additional RSSI information from the reception unit; extracting features of variability between the additional RSSI information and the initial RSSI information; searching for variability fingerprints matching the initial location and extracted RSSI variability features in a variability fingerprint database; and updating a second location to a current location of the reception unit when the second location corresponding to the retrieved variability fingerprint is different from the initial location, wherein the second location is a location in a candidate area within a preset distance range ceType: ApplicationFiled: July 19, 2023Publication date: April 18, 2024Applicants: SKAIChips Co., Ltd., Research & Business Foundation SUNGKYUNKWAN UNIVERSITYInventors: Kang Yoon LEE, Dong Gyun KIM, Ju Won OH, Jong Wan JO
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Patent number: 11944661Abstract: The present invention provides a pharmaceutical composition for prevention or treatment of a stress disease and depression, the pharmaceutical composition be safely useable without toxicity and side effects by using an extract of leaves of Vaccinium bracteatum Thunb., which is natural resource of Korea, so that the reduction of manufacturing and production costs and the import substitution and export effects can be expected through the replacement of a raw material for preparation with a plant inhabiting in nature.Type: GrantFiled: February 7, 2018Date of Patent: April 2, 2024Assignee: JEONNAM BIOINDUSTRY FOUNDATIONInventors: Chul Yung Choi, Dool Ri Oh, Yu Jin Kim, Eun Jin Choi, Hyun Mi Lee, Dong Hyuck Bae, Kyo Nyeo Oh, Myung-A Jung, Ji Ae Hong, Kwang Su Kim, Hu Won Kang, Jae Yong Kim, Sang O Pan, Sung Yoon Park, Rack Seon Seong
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Patent number: 11949881Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: April 1, 2021Date of Patent: April 2, 2024Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
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Publication number: 20240107032Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: ApplicationFiled: December 7, 2023Publication date: March 28, 2024Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, University-Industry Cooperation Group of Kyung Hee UniversityInventors: Hae Chul CHOI, Se Yoon JEONG, Sung-Chang LIM, Jin Soo CHOI, Jin Woo HONG, Dong Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Gwang Hoon PARK, Seung Ryong KOOK, Sea-Nae PARK, Kwang-Su JEONG
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Publication number: 20240073416Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.Type: ApplicationFiled: November 6, 2023Publication date: February 29, 2024Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, Universily-lndustry Cooperation Group of Kyung Hee UniversityInventors: Sung Chang LIM, Ha Hyun LEE, Se Yoon JEONG, Hui Yong KIM, Suk Hee CHO, Jong Ho KIM, Jin Ho LEE, Jin Soo CHOI, Jin Woong KIM, Chie Teuk AHN, Dong Gyu SIM, Seoung Jun OH, Gwang Hoon PARK, Sea Nae PARK, Chan Woong JEON
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Patent number: 11543687Abstract: An optoelectronic device. The optoelectronic device comprising: a rib waveguide provided on a substrate of the device, the rib waveguide comprising a ridge portion and a slab portion; a heater, disposed within the slab portion; a thermally isolating trench, adjacent to the rib waveguide, and extending into the substrate of the device; and a thermally isolating cavity within the substrate, which is directly connected to the thermally isolating trench, and which extends across at least a part of a width of the rib waveguide between the rib waveguide and the substrate.Type: GrantFiled: May 10, 2019Date of Patent: January 3, 2023Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, Hooman Abediasl, Yi Zhang, Aaron John Zilkie
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Patent number: 11209678Abstract: An optoelectronic device, including: a rib waveguide, the rib waveguide including: a ridge portion, which includes a temperature-sensitive optically active region, and a slab portion, positioned adjacent to the ridge portion; the device further comprising a heater, disposed on top of the slab portion wherein a part of the heater closest to ridge portion is at least 2 ?m away from the ridge portion. The device may also have a heater provided with a bottom cladding layer, and may also include various thermal insulation enhancing cavities.Type: GrantFiled: February 20, 2019Date of Patent: December 28, 2021Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, Hooman Abediasl, Gerald Cois Byrd, Karlheinz Muth, Yi Zhang, Aaron John Zilkie
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Patent number: 11209679Abstract: A photonic integrated circuit, an optoelectronic modulator, and a method of modulating light in a photonic integrated circuit are provided. The photonic integrated circuit comprises: an input waveguide which, in use, receives light in a superposition of two polarisation modes of the waveguide; a polarisation splitter, connected to the input waveguide, and configured to provide, at a first output, light in a first polarisation mode of the two polarisation modes of the waveguide and, at a second output, light in a second polarisation mode of the two polarisation modes of the waveguide; a first polarisation rotator, connected to the first output of the polarisation splitter, and configured to rotate light received therefrom from the first polarisation mode to the second polarisation mode; an optoelectronic modulator, having a first modulation waveguide connected to the first polarisation rotator and a second modulation waveguide connected to the second output of the polarisation splitter.Type: GrantFiled: October 29, 2019Date of Patent: December 28, 2021Assignee: Rockley Photonics LimitedInventors: Thomas Pierre Schrans, Dong Yoon Oh, Aaron John Zilkie
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Patent number: 11150494Abstract: A Mach-Zehnder waveguide modulator. In some embodiments, the Mach-Zehnder waveguide modulator includes a first arm including a first optical waveguide, and a second arm including a second optical waveguide. The first optical waveguide includes a junction, and the Mach-Zehnder waveguide modulator further includes a plurality of electrodes for providing a bias across the junction to enable control of the phase of light travelling through the junction.Type: GrantFiled: August 23, 2019Date of Patent: October 19, 2021Assignee: Rockley Photonics LimitedInventors: Guomin Yu, Hooman Abediasl, Aaron L. Birkbeck, Jeffrey Driscoll, Haydn Frederick Jones, Damiana Lerose, Amit Singh Nagra, David Arlo Nelson, Dong Yoon Oh, Pradeep Srinivasan, Aaron John Zilkie
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Patent number: 11054674Abstract: A modulator. In some embodiments, the modulator includes a portion of an optical waveguide, the waveguide including a rib extending upwards from a surrounding slab. The rib may have a first sidewall, and a second sidewall parallel to the first sidewall. The rib may include a first region of a first conductivity type, and a second region of a second conductivity type different from the first conductivity type. The second region may have a first portion parallel to and extending to the first sidewall, and a second portion parallel to the second sidewall. The first region may extend between the first portion of the second region and the second portion of the second region.Type: GrantFiled: April 24, 2019Date of Patent: July 6, 2021Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, David Arlo Nelson, Pradeep Srinivasan, Amit Singh Nagra, Aaron John Zilkie, Jeffrey Driscoll, Aaron L. Birkbeck
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Publication number: 20210191163Abstract: An optoelectronic device. The optoelectronic device comprising: a rib waveguide provided on a substrate of the device, the rib waveguide comprising a ridge portion and a slab portion; a heater, disposed within the slab portion; a thermally isolating trench, adjacent to the rib waveguide, and extending into the substrate of the device; and a thermally isolating cavity within the substrate, which is directly connected to the thermally isolating trench, and which extends across at least a part of a width of the rib waveguide between the rib waveguide and the substrate.Type: ApplicationFiled: May 10, 2019Publication date: June 24, 2021Inventors: Dong Yoon OH, Hooman ABEDIASL, Yi ZHANG, Aaron John ZILKIE
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Patent number: 10935724Abstract: A polarization rotator and a polarization stabilizer. The polarization rotator includes a rib waveguide. The rib waveguide including: a slab portion; and a ridge portion, which is disposed along a surface of the slab portion. The slab portion has a first slab region whose width, as measured in a direction perpendicular to a guiding direction of the waveguide, increases from a first slab width to a second slab width along a first length, and the ridge portion has a first ridge region whose width, as measured in the same direction as the slab widths, decreases from a first ridge width to a second ridge width along the same first length; such that the rotator is configured to rotate the polarization of light during its transmission through the rib waveguide.Type: GrantFiled: March 22, 2019Date of Patent: March 2, 2021Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, Aaron John Zilkie
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Patent number: 10886691Abstract: A ring optical resonator is formed on a substrate. An outer circumferential surface of the resonator substantially confines one or more circumferential resonant optical modes. The resonator is positioned above a void formed in the substrate and is supported above the void by a portion of a material layer on the substrate that extends radially inward above the void from an outer circumferential edge of the void to the outer circumferential surface of the resonator. An optical waveguide can be integrally formed on the substrate and traverses a portion of the material layer above the void. The optical waveguide and the ring optical resonator are arranged and positioned so as to establish evanescent optical coupling between them. Q-factors of 108 or more have been achieved with a silica resonator and silicon nitride waveguide integrally formed on a silicon substrate.Type: GrantFiled: May 5, 2017Date of Patent: January 5, 2021Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Kerry Vahala, Kiyoul Yang, Dong Yoon Oh, Seung Hoon Lee
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Patent number: 10802216Abstract: A polarization rotator and a polarization stabilizer. The polarization rotator includes a rib waveguide. The rib waveguide including: a slab portion; and a ridge portion, which is disposed along a surface of the slab portion. The slab portion has a first slab region whose width, as measured in a direction perpendicular to a guiding direction of the waveguide, increases from a first slab width to a second slab width along a first length, and the ridge portion has a first ridge region whose width, as measured in the same direction as the slab widths, decreases from a first ridge width to a second ridge width along the same first length; such that the rotator is configured to rotate the polarization of light during its transmission through the rib waveguide.Type: GrantFiled: March 22, 2019Date of Patent: October 13, 2020Assignee: Rockley Photonics LimitedInventors: Dong Yoon Oh, Aaron John Zilkie
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Publication number: 20200133034Abstract: A photonic integrated circuit, an optoelectronic modulator, and a method of modulating light in a photonic integrated circuit are provided. The photonic integrated circuit comprises: an input waveguide which, in use, receives light in a superposition of two polarisation modes of the waveguide; a polarisation splitter, connected to the input waveguide, and configured to provide, at a first output, light in a first polarisation mode of the two polarisation modes of the waveguide and, at a second output, light in a second polarisation mode of the two polarisation modes of the waveguide; a first polarisation rotator, connected to the first output of the polarisation splitter, and configured to rotate light received therefrom from the first polarisation mode to the second polarisation mode; an optoelectronic modulator, having a first modulation waveguide connected to the first polarisation rotator and a second modulation waveguide connected to the second output of the polarisation splitter.Type: ApplicationFiled: October 29, 2019Publication date: April 30, 2020Inventors: Thomas Pierre Schrans, Dong Yoon Oh, Aaron John Zilkie
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Publication number: 20190302361Abstract: A polarization rotator and a polarization stabilizer. The polarization rotator includes a rib waveguide. The rib waveguide including: a slab portion; and a ridge portion, which is disposed along a surface of the slab portion. The slab portion has a first slab region whose width, as measured in a direction perpendicular to a guiding direction of the waveguide, increases from a first slab width to a second slab width along a first length, and the ridge portion has a first ridge region whose width, as measured in the same direction as the slab widths, decreases from a first ridge width to a second ridge width along the same first length; such that the rotator is configured to rotate the polarization of light during its transmission through the rib waveguide.Type: ApplicationFiled: March 22, 2019Publication date: October 3, 2019Inventors: Dong Yoon Oh, Aaron John Zilkie
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Publication number: 20190258094Abstract: An optoelectronic device, including: a rib waveguide, the rib waveguide including: a ridge portion, which includes a temperature-sensitive optically active region, and a slab portion, positioned adjacent to the ridge portion; the device further comprising a heater, disposed on top of the slab portion wherein a part of the heater closest to ridge portion is at least 2 ?m away from the ridge portion. The device may also have a heater provided with a bottom cladding layer, and may also include various thermal insulation enhancing cavities.Type: ApplicationFiled: February 20, 2019Publication date: August 22, 2019Inventors: Dong Yoon Oh, Hooman Abediasl, Gerald Cois Byrd, Karlheinz Muth, Yi Zhang, Aaron John Zilkie
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Publication number: 20180006424Abstract: A ring optical resonator is formed on a substrate. An outer circumferential surface of the resonator substantially confines one or more circumferential resonant optical modes. The resonator is positioned above a void formed in the substrate and is supported above the void by a portion of a material layer on the substrate that extends radially inward above the void from an outer circumferential edge of the void to the outer circumferential surface of the resonator. An optical waveguide can be integrally formed on the substrate and traverses a portion of the material layer above the void. The optical waveguide and the ring optical resonator are arranged and positioned so as to establish evanescent optical coupling between them. Q-factors of 108 or more have been achieved with a silica resonator and silicon nitride waveguide integrally formed on a silicon substrate.Type: ApplicationFiled: May 5, 2017Publication date: January 4, 2018Inventors: Kerry Vahala, Kiyoul Yang, Dong Yoon Oh, Seung Hoon Lee
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Patent number: 8569739Abstract: A method of etching active quantum nanostructures provides the step of laterally etching of an intermediate active quantum nanostructure layer interposed between cladding layers. The lateral etching can be carried out on at least one side of the intermediate active quantum nanostructure layer selectively, with respect to the cladding layers to define at least one lateral recess or spacing in the intermediate active quantum nanostructure layer and respective lateral protrusions of cladding layers protruding with respect to the intermediate active quantum nanostructure layer. This method can be applied to create devices including active quantum nanostructures such as, for example, three-dimensional photonic crystals, a photonic crystal double-slab and a photonic crystal laser.Type: GrantFiled: December 8, 2011Date of Patent: October 29, 2013Assignee: California Institute of TechnologyInventors: Seheon Kim, Axel Scherer, Jingqing Huang, Dong Yoon Oh
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Patent number: 8456136Abstract: A method and apparatus for battery gauging in a portable terminal are provided. In the battery gauging method, it is determined in a low-power mode whether a listening interval occurs for detecting the presence of a received signal. The remaining battery capacity is detected if the listening interval occurs. An interrupt signal is transmitted to the second processor, operating in a low-power mode, if the remaining battery capacity is less than or equal to a threshold. Upon receipt of the interrupt signal, the second processor wakes up to interrupt the power of the portable terminal.Type: GrantFiled: September 30, 2009Date of Patent: June 4, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jin-Kyu Kim, Dong-Yoon Oh