Patents by Inventor Dong-Gyu Ahn
Dong-Gyu Ahn 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: 20240149109Abstract: A knee joint rehabilitation apparatus for a wheelchair includes a rehabilitation apparatus frame having a height corresponding to a length of each of legs of a patient sitting on the wheelchair; an upper leg support disposed at an upper end of the rehabilitation apparatus frame and supporting upper legs of the patient thereon while the patient is sitting on the wheelchair; a lower leg support pivotably connected to the upper leg support, wherein the lower legs of the patient are seated and supported on the lower leg support; and an exercise control unit disposed on the rehabilitation apparatus frame and configured to allow the lower leg support to pivot around a connection portion between the lower leg support and the upper leg support such that the patient performs rehabilitation exercise of the knee joint thereof while sitting on the wheelchair.Type: ApplicationFiled: January 10, 2022Publication date: May 9, 2024Applicant: HEXARHUMANCARE CO., LTDInventors: Chang Soo HAN, Ho Jun KIM, Su Hyu PARK, Young Hoon JI, Jeong Ho CHO, Byung Gab RYU, Jeong Gyu PARK, Dong Eun CHOI, Cheol Woong AHN
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Patent number: 11973960Abstract: A video encoding/decoding apparatus according to the present invention acquires motion vector refinement information, performs motion compensation on the basis of a motion vector of a current block, refines the motion vector of the current block using at least one or both of the motion vector refinement information and the output of the motion compensation, and performs motion compensation using the refined motion vector.Type: GrantFiled: June 9, 2022Date of Patent: April 30, 2024Assignee: INTELLECTUAL DISCOVERY CO., LTD.Inventors: Yong Jo Ahn, Dong Gyu Sim, Ho Chan Ryu, Seanae Park, Byung Tae Oh, Byung Cheol Song
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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: 10279420Abstract: Provided is a rapid manufacturing process of ferrous and non-ferrous parts using a plasma electron beam in which the plasma electron beam is workable even in a low vacuum pressure environment and has a relatively large radiation range, productivity of the process is improved as a high-power beam can be emitted to a ferrous and non-ferrous powder, and production costs are reduced due to low maintenance and manufacturing costs.Type: GrantFiled: October 25, 2016Date of Patent: May 7, 2019Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITYInventors: Dong Gyu Ahn, Ho Jin Lee
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Patent number: 10048988Abstract: A method of operating an electronic device includes segmenting a second message in a first message, allocating the segmented second message to at least two queues, and performing a parallel-processing of the first message based on the allocated second message.Type: GrantFiled: November 18, 2015Date of Patent: August 14, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-Joo Hong, Kyoung-Joong Shin, Dong-Gyu Ahn, Hak-Ryoul Kim, Hyo-Jong Kim, Ji-Ho Ma, Surng-Kyo Oh
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Publication number: 20170120370Abstract: Provided is a rapid manufacturing process of ferrous and non-ferrous parts using a plasma electron beam in which the plasma electron beam is workable even in a low vacuum pressure environment and has a relatively large radiation range, productivity of the process is improved as a high-power beam can be emitted to a ferrous and non-ferrous powder, and production costs are reduced due to low maintenance and manufacturing costs.Type: ApplicationFiled: October 25, 2016Publication date: May 4, 2017Inventors: Dong Gyu AHN, Ho Jin LEE
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Patent number: 9523069Abstract: The present invention relates to a photobioreactor for microalgae cultivation having a bubble circulation structure, which allows gas flowing into a cultivation space to generate a vortex and thus circulate microalgae, thereby improving cultivation efficiency of the microalgae. A photobioreactor for microalgae cultivation according to an embodiment of the present invention includes a cultivation panel major body having the cultivation space into which the microalgae are injected to be cultivated; a gas supply pipe provided at a lower portion of the cultivation panel major body to pass through the cultivation space in a transverse direction and thus discharge inflow gas; and at least one vortex forming partition extending in a transverse direction from an internal wall of the cultivation panel major body and formed to have an arc shape and thus cause a vortex to an ascending current of gas supplied through the gas supply pipe.Type: GrantFiled: December 18, 2014Date of Patent: December 20, 2016Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITYInventors: Sang Hwa Jeong, Jong Rak Park, Jong Tye Kim, Dong Gyu Ahn, Jeong Woo Park
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Publication number: 20160142363Abstract: A method of operating an electronic device includes segmenting a second message in a first message, allocating the segmented second message to at least two queues, and performing a parallel-processing of the first message based on the allocated second message.Type: ApplicationFiled: November 18, 2015Publication date: May 19, 2016Inventors: Young-Joo Hong, Kyoung-Joong Shin, Dong-Gyu Ahn, Hak-Ryoul Kim, Hyo-Jong Kim, Ji-Ho Ma, Surng-Kyo Oh
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Publication number: 20150175946Abstract: The present invention relates to a photobioreactor for microalgae cultivation having a bubble circulation structure, which allows gas flowing into a cultivation space to generate a vortex and thus circulate microalgae, thereby improving cultivation efficiency of the microalgae. A photobioreactor for microalgae cultivation according to an embodiment of the present invention includes a cultivation panel major body having the cultivation space into which the microalgae are injected to be cultivated; a gas supply pipe provided at a lower portion of the cultivation panel major body to pass through the cultivation space in a transverse direction and thus discharge inflow gas; and at least one vortex forming partition extending in a transverse direction from an internal wall of the cultivation panel major body and formed to have an arc shape and thus cause a vortex to an ascending current of gas supplied through the gas supply pipe.Type: ApplicationFiled: December 18, 2014Publication date: June 25, 2015Inventors: Sang Hwa Jeong, Jong Rak Park, Jong Tye Kim, Dong Gyu Ahn, Jeong Woo Park
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Patent number: 8688039Abstract: A method for providing information by an information providing device with a Bluetooth module in an information broadcast service based on Bluetooth. The method includes broadcasting an inquiry signal to provide the information; receiving an inquiry response signal; determining if a broadcast request is included in the inquiry response signal; and delivering the information to a Bluetooth device that sent the inquiry response signal, when a broadcast request is included in the inquiry response signal.Type: GrantFiled: October 28, 2009Date of Patent: April 1, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Gyu Ahn, Keun-Ho Shin
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Publication number: 20110119510Abstract: An apparatus and method for reducing power consumption in a portable terminal are provided. The apparatus includes a mode manager for, if determining data reception before sleep mode entry, processing to convert a state of a controller into a wakeup state and to complete the data reception and, if determining data non-reception before the sleep mode entry, converting a state of the controller into a sleep state at the same time as the sleep mode entry.Type: ApplicationFiled: November 9, 2010Publication date: May 19, 2011Applicant: Samsung Electronics Co. Ltd.Inventor: Dong-Gyu AHN
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Publication number: 20100105328Abstract: A method for providing information by an information providing device with a Bluetooth module in an information broadcast service based on Bluetooth. The method includes broadcasting an inquiry signal to provide the information; receiving an inquiry response signal; determining if a broadcast request is included in the inquiry response signal; and delivering the information to a Bluetooth device that sent the inquiry response signal, when a broadcast request is included in the inquiry response signal.Type: ApplicationFiled: October 28, 2009Publication date: April 29, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Dong-Gyu Ahn, Keun-Ho Shin
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Publication number: 20100093280Abstract: A Bluetooth® connection method and a Bluetooth module for discovering and connecting peripheral Bluetooth devices. An inquiry signal is sent with a minimum transmit power. It is determined if an inquiry response signal is received for a waiting time. A path loss corresponding to each inquiry response signal is calculated when a plurality of inquiry response signals are received for the waiting time, the calculated path losses are compared, and Bluetooth® connection is performed with a Bluetooth® device that sent an inquiry response signal having a lowest path loss.Type: ApplicationFiled: October 14, 2009Publication date: April 15, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dong-Gyu Ahn, Jong-Kyu Lee, Hak-Ryoul Kim
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Patent number: 6702918Abstract: A rapid prototyping process and apparatus that provides an intermittent material feed type variable-lamination rapid prototyping using a linear thermal cutting system, wherein intermittently fed materials are cut to have variable lengths, widths, and lateral gradients with the 4-axis control-type linear thermal cutting system controlled by a computer, and based on cutting operation data generated in the computer.Type: GrantFiled: July 8, 2002Date of Patent: March 9, 2004Assignee: Korea Advanced Institute of Science and TechnologyInventors: Dong-Yol Yang, Dong-Gyu Ahn, Sang-Ho Lee, Hong-Seok Choi, Seung-Kyo Park
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Patent number: 6627030Abstract: Disclosed herein is a variable lamination manufacturing process and apparatus. The method comprises the step of coating strip-shaped material with an adhesive while the strip-shaped material is fed. Thereafter, the strip-shaped material being fed is cut into material pieces of a variable width, variable inclinations and a variable length in accordance with the three-dimensional computer aided design data of a three-dimensional product using a linear heat source. The cut material pieces are stacked on a moving table to be positioned in the corresponding positions of the three-dimensional product. Finally, the stacked cut material pieces are pushed to bond one piece to anther.Type: GrantFiled: March 12, 2001Date of Patent: September 30, 2003Assignee: Korea Advanced Institute of Science and TechnologyInventors: Dong-Yol Yang, Dong-Gyu Ahn, Bo-Sung Shin, Sang-Ho Lee
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Publication number: 20030006001Abstract: A rapid prototyping process and apparatus that provides an intermittent material feed type variable-lamination rapid prototyping using a linear thermal cutting system, wherein intermittently fed materials are cut to have variable lengths, widths, and lateral gradients with the 4-axis control-type linear thermal cutting system controlled by a computer, and based on cutting operation data generated in the computer.Type: ApplicationFiled: July 8, 2002Publication date: January 9, 2003Applicant: Korea Advanced Institute of Science and TechnologyInventors: Dong-Yol Yang, Dong-Gyu Ahn, Sang-Ho Lee, Hong-Seok Choi, Seung-Kyo Park
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Publication number: 20010040003Abstract: Disclosed herein is a variable lamination manufacturing process and apparatus. The method comprises the step of coating strip-shaped material with an adhesive while the strip-shaped material is fed. Thereafter, the strip-shaped material being fed is cut into material pieces of a variable width, variable inclinations and a variable length in accordance with the three-dimensional computer aided design data of a three-dimensional product using a linear heat source. The cut material pieces are stacked on a moving table to be positioned in the corresponding positions of the three-dimensional product. Finally, the stacked cut material pieces are pushed to bond one piece to anther.Type: ApplicationFiled: March 12, 2001Publication date: November 15, 2001Inventors: Dong-Yol Yang, Dong-Gyu Ahn, Bo-Sung Shin, Sang-Ho Lee