Patents by Inventor Weon Choi
Weon 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).
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Patent number: 11155369Abstract: Provided are an artificial satellite and a method of controlling the same. The artificial satellite includes a main body flying along an orbit of a planet, an optical payload arranged on the main body to photograph a ground surface of the planet, and a pair of solar cell panels rotatably arranged on both sides of the main body in a first direction, wherein the first direction and a flight direction of the main body form an acute angle with each other.Type: GrantFiled: July 5, 2018Date of Patent: October 26, 2021Assignee: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon-Jin Jeon, Seok-Weon Choi, Seong-Bin Lim
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Patent number: 10696427Abstract: A method of controlling a satellite and a computer-readable recording medium are provided. The method is for controlling a satellite moving along an orbit having an inclination angle from the equatorial plane to capture due-north images. The method includes: determining a position of the satellite; calculating a roll angle and a pitch angle of the satellite for pointing a line-of-sight vector of the satellite to a first ground surface being a photographing point; determining a compensation angle by considering effects of the inclination angle and rotation of the Earth so as to capture images in the due north direction of the photographing point; calculating a yaw angle based on the compensation angle; and rotating the satellite according to the calculated roll angle, pitch angle, and yaw angle.Type: GrantFiled: June 15, 2017Date of Patent: June 30, 2020Assignee: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon-Jin Jeon, Seong-Bin Lim, Seok-Weon Choi
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Publication number: 20190055038Abstract: Provided are an artificial satellite and a method of controlling the same. The artificial satellite includes a main body flying along an orbit of a planet, an optical payload arranged on the main body to photograph a ground surface of the planet, and a pair of solar cell panels rotatably arranged on both sides of the main body in a first direction, wherein the first direction and a flight direction of the main body form an acute angle with each other.Type: ApplicationFiled: July 5, 2018Publication date: February 21, 2019Applicant: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon-Jin Jeon, Seok-Weon Choi, Seong-Bin Lim
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Patent number: 10167093Abstract: Provided is an apparatus for controlling an orbiting satellite by sensing a change in a yaw angle of the orbiting satellite and calculating a ground sample distance (GSD) based on the yaw angle. The apparatus may include a sensor configured to sense a yaw angle corresponding to yaw steering of the orbiting satellite, and a processor configured to calculate, based on the yaw angle, a GSD corresponding to a length of a pixel projected onto a planetary surface scanned by the orbiting satellite.Type: GrantFiled: July 27, 2017Date of Patent: January 1, 2019Assignee: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon Jin Jeon, Sang Rok Lee, Hui Kyung Kim, Eung Hyun Kim, Seong Bin Lim, Seok Weon Choi
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Publication number: 20170361949Abstract: A method of controlling a satellite and a computer-readable recording medium are provided. The method is for controlling a satellite moving along an orbit having an inclination angle from the equatorial plane to capture due-north images. The method includes: determining a position of the satellite; calculating a roll angle and a pitch angle of the satellite for pointing a line-of-sight vector of the satellite to a first ground surface being a photographing point; determining a compensation angle by considering effects of the inclination angle and rotation of the Earth so as to capture images in the due north direction of the photographing point; calculating a yaw angle based on the compensation angle; and rotating the satellite according to the calculated roll angle, pitch angle, and yaw angle.Type: ApplicationFiled: June 15, 2017Publication date: December 21, 2017Applicant: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon-Jin JEON, Seong-Bin LIM, Seok-Weon CHOI
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Publication number: 20170320599Abstract: Provided is an apparatus for controlling an orbiting satellite by sensing a change in a yaw angle of the orbiting satellite and calculating a ground sample distance (GSD) based on the yaw angle. The apparatus may include a sensor configured to sense a yaw angle corresponding to yaw steering of the orbiting satellite, and a processor configured to calculate, based on the yaw angle, a GSD corresponding to a length of a pixel projected onto a planetary surface scanned by the orbiting satellite.Type: ApplicationFiled: July 27, 2017Publication date: November 9, 2017Inventors: Moon Jin Jeon, Sang Rok Lee, Hui Kyung Kim, Eung Hyun Kim, Seong Bin Lim, Seok Weon Choi
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Patent number: 9751645Abstract: Provided is an apparatus for controlling an orbiting satellite by sensing a change in a yaw angle of the orbiting satellite and calculating a ground sample distance (GSD) based on the yaw angle. The apparatus may include a sensor configured to sense a yaw angle corresponding to yaw steering of the orbiting satellite, and a processor configured to calculate, based on the yaw angle, a GSD corresponding to a length of a pixel projected onto a planetary surface scanned by the orbiting satellite.Type: GrantFiled: December 1, 2015Date of Patent: September 5, 2017Assignee: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Moon Jin Jeon, Sang Rok Lee, Hui Kyung Kim, Eung Hyun Kim, Seong Bin Lim, Seok Weon Choi
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Publication number: 20170073088Abstract: Provided is an apparatus for controlling an orbiting satellite by sensing a change in a yaw angle of the orbiting satellite and calculating a ground sample distance (GSD) based on the yaw angle. The apparatus may include a sensor configured to sense a yaw angle corresponding to yaw steering of the orbiting satellite, and a processor configured to calculate, based on the yaw angle, a GSD corresponding to a length of a pixel projected onto a planetary surface scanned by the orbiting satellite.Type: ApplicationFiled: December 1, 2015Publication date: March 16, 2017Inventors: Moon Jin JEON, Sang Rok LEE, Hui Kyung KIM, Eung Hyun KIM, Seong Bin LIM, Seok Weon CHOI
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Patent number: 8848630Abstract: An apparatus and method for supporting Hybrid Automatic Repeat reQuest (HARQ) for an anonymously allocated bandwidth in a broadband wireless communication system are provided. The method of a terminal includes obtaining classification information of HARQ support ranging codes from a message received from a base station, to request an anonymously allocated resource, transmitting one of the HARQ support ranging codes, receiving a resource allocation message including HARQ related information and anonymous resource allocation information, and transmitting one of a ranging request message and a bandwidth request header according to the resource allocation information.Type: GrantFiled: April 19, 2011Date of Patent: September 30, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Hyuk Jang, Jae-Weon Choi, Hyun-Kyu Yu, Won-Il Roh, Jae-Jeong Shim
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Patent number: 8815088Abstract: According to the present invention, a dialysis fluid pump comprises: a housing having an accommodating space formed therein; a dialysis fluid supply tube and a dialysis fluid recovery tube, at least a portion of each of which is accommodated in the accommodating space; a cam rotatably installed in the accommodating space; a motor for rotating the cam; and a first backflow pressure preventer and a second backflow pressure preventer adapted to be mobile in the accommodating space and be pushed by the cam. The dialysis fluid supply tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid supply tank and the other end thereof is connected to a hemodialysis filter. The dialysis fluid recovery tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid recovery tank and the other end thereof connected to the hemodialysis filter.Type: GrantFiled: January 17, 2011Date of Patent: August 26, 2014Assignees: Ancbio Co., Ltd.Inventors: Nak-Myung Choi, Kyungsoo Lee, Cho Hay Mun, Sa Ram Lee, Dong Wook Lee, Byoung-Goo Min, Jong-Weon Choi
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Publication number: 20140154130Abstract: Provided is an aluminum alloy, and particularly, a die casting aluminum alloy for a heat sink, which includes 0.01 to 0.5 wt % of Cu, 0.3 to 0.6 wt % of Fe, 1.0 to 1.5 wt % of Si, and thus may enhance heat dissipation and castability.Type: ApplicationFiled: June 14, 2012Publication date: June 5, 2014Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGYInventors: Jae Ik Cho, Young Chan Kim, Cheol Woo Kim, Se Weon Choi, Chang Seong Kang
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Publication number: 20130008843Abstract: According to the present invention, a dialysis fluid pump comprises: a housing having an accommodating space formed therein; a dialysis fluid supply tube and a dialysis fluid recovery tube, at least a portion of each of which is accommodated in the accommodating space; a cam rotatably installed in the accommodating space; a motor for rotating the cam; and a first backflow pressure preventer and a second backflow pressure preventer adapted to be mobile in the accommodating space and be pushed by the cam. The dialysis fluid supply tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid supply tank and the other end thereof is connected to a hemodialysis filter. The dialysis fluid recovery tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a dialysis fluid recovery tank and the other end thereof connected to the hemodialysis filter.Type: ApplicationFiled: January 17, 2011Publication date: January 10, 2013Inventors: Nak-Myung Choi, Kyungsoo Lee, Cho Hay Mun, Sa Ram Lee, Dong Wook Lee, Byoung-Goo Min, Jong-Weon Choi
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Publication number: 20120325736Abstract: According to the present invention, a dialyzing fluid pump comprises; a housing having an accommodating space formed therein; a dialyzing fluid supply tube and a dialyzing fluid recovery tube, at least a portion of each of which is accommodated in the accommodating space; a cam rotatably installed in the accommodation space; and a motor for rotating the cam. The dialyzing fluid supply tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to a hemodialysis filter and the other end thereof is connected to a dialyzing fluid supply tank. The dialyzing fluid recovery tube is made of a flexible material which can be contracted or relaxed, and one end thereof is connected to the hemodialysis filter and the other end thereof is connected to a dialyzing fluid recovery tank.Type: ApplicationFiled: January 17, 2011Publication date: December 27, 2012Inventors: Nak-Myung Choi, Kyungsoo Lee, Cho Hay Mun, Sa Ram Lee, Dong Wook Lee, Byoung-Goo Min, Jong-Weon Choi
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Publication number: 20120046072Abstract: Provided are a user terminal, a remote terminal, and a method for sharing an augmented reality (AR) service. The method for sharing an AR service by a user terminal includes displaying an image received from a remote terminal; recognizing an object included in the displayed image; generating first AR result information using first AR data of the object stored in a first database; and displaying the generated first AR result information and the recognized object.Type: ApplicationFiled: June 22, 2011Publication date: February 23, 2012Applicant: PANTECH CO., LTD.Inventors: Bong Weon CHOI, Moon Key KANG, Tae Hun EOM, Sang Wook LEE, Young Youn LEE, Hyoung Jun JEON, Jae Young CHOI
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Publication number: 20110268091Abstract: An apparatus and method for supporting Hybrid Automatic Repeat reQuest (HARQ) for an anonymously allocated bandwidth in a broadband wireless communication system are provided. The method of a terminal includes obtaining classification information of HARQ support ranging codes from a message received from a base station, to request an anonymously allocated resource, transmitting one of the HARQ support ranging codes, receiving a resource allocation message including HARQ related information and anonymous resource allocation information, and transmitting one of a ranging request message and a bandwidth request header according to the resource allocation information.Type: ApplicationFiled: April 19, 2011Publication date: November 3, 2011Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Jae-Hyuk JANG, Jae-Weon CHOI, Hyun-Kyu YU, Won-Il ROH, Jae-Jeong SHIM
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Publication number: 20110139704Abstract: A blood dialyzing apparatus includes a blood dialyzing filter for dialyzing blood by using a pressure difference between the blood and a dialysis solution, and a supplying means for supplying the blood and the dialysis solution to the blood dialyzing filter in order to alternately generate a state where a blood pressure is higher than a dialysis solution pressure and a state where the dialysis solution pressure is higher than the blood pressure. The blood dialyzing apparatus dialyzes a large volume of blood in a short period of time without increasing the size of the blood dialyzing filter and simply controls the volume of the dialyzed blood by adjusting the supply pressures of the blood and the dialysis solution.Type: ApplicationFiled: August 26, 2008Publication date: June 16, 2011Applicant: BHK CO., LTD.Inventors: Jong Weon Choi, Hak Chun Kim, Jin Seok Kim, Byeong Seok Kim, Byoung Goo Min, Kyung Soo Lee, Sa Ram Lee, Cho Hae Mun
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Patent number: 7787745Abstract: A system for playing a digest of a moving image file is provided, including: a header parsing part that parses a header of the moving image file and acquires information concerning the playback length M and random access point of the moving image file; a section dividing part that divides the playback length M by the number N of equal sections and determines a starting point S(i) of each of the sections; a correction part that corrects the starting point S(i) to a closest random access point R(i) of the moving image file; and a digest playback part that determines a playback segment P(i) of each of the sections which corresponds to a distance extended from the closest random access point R(i) by a playback length L, and sequentially plays the playback segments P(i).Type: GrantFiled: July 12, 2006Date of Patent: August 31, 2010Assignee: Pantech Co., Ltd.Inventor: Bong-Weon Choi
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Publication number: 20070111836Abstract: The timing belt and a coupling structure of the same are disclosed, in which a stress focused at a corner portion decreases by forming an optimum shaped groove at a corner portion of a timing belt, so that it is possible to largely increase a fatigue life span of a timing belt and a durability of a timing belt. In addition, noises and vibrations can be minimized by forming a through hole at a threaded surface of a timing belt or a threaded portion of a sprocket. In the timing belt, which has threads at a belt body, there is provided an improved timing belt comprising a groove formed at a corner portion in which the threads and the belt body contact with each other.Type: ApplicationFiled: February 2, 2006Publication date: May 17, 2007Inventors: Young Kwon, Hyun Kwon, Weon Choi, Hyok Kwon
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Publication number: 20070093643Abstract: Disclosed herein is an organic electroluminescent polymer having 9,9-di(fluorenyl)-2,7-fluorenyl unit and an electroluminescent device using the same. Specifically, the current invention provides an organic electroluminescent polymer having 9,9-di(fluorenyl)-2,7-fluorenyl unit, which can be used as a blue electroluminescent polymer and host material by introducing the substituted fluorenyl group at the 9-position of fluorene, and an electroluminescent device using the electroluminescent polymer. The electroluminescent polymer is applicable as a host material for highly pure blue, green and red, having high solubility, high heat stability and high quantum efficiency.Type: ApplicationFiled: January 28, 2005Publication date: April 26, 2007Applicant: SK CORPORATIONInventors: Hong You, Weon Choi, Dong Shin, Sang Lee, Jae Jin, Jong Kim, Soon Kwon, Yun Kim
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Publication number: 20070071405Abstract: A system for playing a digest of a moving image file is provided, including: a header parsing part that parses a header of the moving image file and acquires information concerning the playback length M and random access point of the moving image file; a section dividing part that divides the playback length M by the number N of equal sections and determines a starting point S(i) of each of the sections; a correction part that corrects the starting point S(i) to a closest random access point R(i) of the moving image file; and a digest playback part that determines a playback segment P(i) of each of the sections which corresponds to a distance extended from the closest random access point R(i) by a playback length L, and sequentially plays the playback segments P(i).Type: ApplicationFiled: July 12, 2006Publication date: March 29, 2007Inventor: Bong-Weon Choi