Patents Assigned to Korea Polytechnic University
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Patent number: 8400980Abstract: Disclosed are a fast handover system and a method thereof. The fast handover method can include: allowing a mobile node (MN) to transmit a handover information message to a previous mobile access gateway (PMAG); allowing the PMAG to transmit a fast proxy binding update (FPBU) message to a local mobility anchor (LMA) on the basis of the handover information message received from the MN; allowing the LMA to transmit a handover initiation (HI) message including MN-ID and proxy-care-of address (CoA) of the PMAG to a new MAG (NMAG); transmitting a position update message to the NMAG if the MN is attached to a target BS that is connected to the NMAG; and allowing the NMAG to deliver a buffered packet to the MN.Type: GrantFiled: June 10, 2009Date of Patent: March 19, 2013Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Pyung Soo Kim, Eung Tea Kim, Seong Yong Kim
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Patent number: 8352239Abstract: An interface device for an emulator is disclosed. The interface device includes a connection unit, a transmission unit, and an interface unit. The connection unit receives data, to be used to emulate a logic, from a host computer, and transmits result data, output from the logic, to the host computer. The transmission unit receives the data from the connection unit and stores (writes) the data in the first area of a register array. If the result data is stored in the second area of the register array, the transmission unit reads the result data and transmits the result data to the connection unit. The interface unit includes at least one register array, outputs a clock, set using the data stored in the first area, to the logic, and stores the result data, output from the logic, in the second area.Type: GrantFiled: May 20, 2011Date of Patent: January 8, 2013Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventor: Jong Pil Choi
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Patent number: 8331449Abstract: Fast encoding method and system are provided which can transmit video data in real time using adaptive intra prediction in accordance with the H.264/AVC (Advanced Video Codec) standard so as to efficiently provide security-related images or multimedia images in various network environments with high quality. An intra prediction method of compressing and encoding an image includes the steps of: comparing an SAD value C calculated from macro block data of a present frame and a previous frame with a reference value K to determine a prediction method; and selectively performing on input macro block data a first method of determining a best mode and a block size by prediction in a plurality of prediction modes based on spatial directivity and generating prediction data and a second method of generating prediction data using the best mode and the block size used in the previous frame, depending on the determined prediction method.Type: GrantFiled: October 30, 2008Date of Patent: December 11, 2012Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Eung Tae Kim, Ki-Young Jang
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Publication number: 20120306905Abstract: A method of processing an image signal includes: converting a source image signal into an image signal corresponding to a color space for a color gamut mapping; reducing a color gamut of the image signal; and mapping the image signal corresponding to colors within the reduced color gamut into an image signal corresponding to colors within a display color gamut, wherein the colors of the display color gamut are displayed by a display panel.Type: ApplicationFiled: December 20, 2011Publication date: December 6, 2012Applicants: Korea Polytechnic University Industry-Academy Corporation Foundation, SAMSUNG ELECTRONICS CO., LTD.Inventors: Heen-dol KIM, Ik-Soo LEE, Bong-Hyun YOU, Jai-Hyun KOH, Kuk-Hwan AHN, Moon-Cheol KIM
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Patent number: 8322019Abstract: Provided is a multiple transposition method for superconducting wire, by making each superconducting wire unit from second-generation superconducting wires that were firstly transposed and then transposing each superconducting wire unit in such a manner that the phase of each unit can be changed along the length, comprising preparing wires by making curves on superconducting wires in such a manner that the superconducting wires of a thin multiple layer grown epitaxially are slit in zigzags and then making the curves repeatedly and by machining the wires with a desired length; making first-transposed superconducting wire units by combining a plurality of the prepared wires such that curves of adjacent wires come in touch to each other and are superposed; preparing a superconducting wire unit bundle by arranging the first-transposed superconducting wires units and by locating a plurality of the first-transposed superconducting wire units in parallel along the length; and making a second transposition on the firType: GrantFiled: July 5, 2010Date of Patent: December 4, 2012Assignees: Korea Polytechnic University Industry Academic Cooperation Foundation, Woosuk University Industry Academic Cooperation FoundationInventors: Kyeong Dal Choi, Ji Kwang Lee, Woo Seok Kim, Chan Park, Yung Il Kim
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Publication number: 20120205665Abstract: Provided are a high-quality non-polar/semi-polar semiconductor device having reduced defect density of a nitride semiconductor layer and improved internal quantum efficiency and light extraction efficiency, and a manufacturing method thereof. The method for manufacturing a semiconductor device is to form a template layer and a semiconductor device structure on a sapphire, SiC or Si substrate having a crystal plane for a growth of a non-polar or semi-polar nitride semiconductor layer. The manufacturing method includes: forming a nitride semiconductor layer on the substrate; performing a porous surface modification such that the nitride semiconductor layer has pores; forming the template layer by re-growing a nitride semiconductor layer on the surface-modified nitride semiconductor layer; and forming the semiconductor device structure on the template layer.Type: ApplicationFiled: August 27, 2010Publication date: August 16, 2012Applicants: KOREA POLYTECHNIC UNIVERSITY Industry Academic Cooperation Foundation, SEOUL OPTO DEVICE CO., LTD.Inventors: Ok Hyun Nam, Dong Hun Lee, Geun Ho Yoo
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Patent number: 8089332Abstract: The present invention relates to a superconducting power transforming apparatus. The superconducting power transforming apparatus according to the present invention comprises a transformer housing having a transforming cable passing hole and filled with a liquid cooling means; a superconducting transformer housed in the transformer housing in a state that the superconducting transformer is immersed in the liquid cooling means; a tap changer housing having a tap changing cable passing hole and vacuum-sealed from outside; a power tap changer housed in the vacuum tap changer housing; and a cable linking pipe vacuum-sealed from the transformer housing and the tap changer housing, and linking the transforming cable passing hole with the tap changing passing hole in order that a transformer winding tap cable connecting the superconducting transformer and the power tap changer passes through.Type: GrantFiled: November 19, 2009Date of Patent: January 3, 2012Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Kyeong-Dal Choi, Ji-Kwang Lee, Woo-Seok Kim, Chan Park, Sun-Bok Choi
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Publication number: 20110270557Abstract: A method for measuring critical current density of superconductor wires according to the present invention is characterized in that it includes: (a) applying an external magnetic field to the superconductor wires, (b) measuring a magnetization loss of the superconductor wires according to the application of the external magnetic field, (c) normalizing the measured magnetization loss, and then calculating a fully-penetration magnetic field of the superconductor wires according to the normalized magnetization loss, (d) calculating a critical current density of the superconductor wires according to the calculated fully-penetration magnetic field. Therefore, the critical current density of parallel superconductor wires such as stacked superconductor wires may be measured without applying current to the superconductor wires directly.Type: ApplicationFiled: July 28, 2010Publication date: November 3, 2011Applicant: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Kyeong Dal Choi, Ji Kwang Lee, Woo Seok Kim, Chan Park, Byung Wook Han, Se Yeon Lee
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Patent number: 8043429Abstract: The present invention relates to a method for fabricating a filament type high-temperature superconducting wire in which a thin film type high-temperature superconducting wire is fabricated into a filament shape suitable for use with alternating current.Type: GrantFiled: March 28, 2007Date of Patent: October 25, 2011Assignee: Korea Polytechnic UniversityInventors: Hee Gyoun Lee, Gye Won Hong, Kyeong Dal Choi
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Patent number: 8035933Abstract: Disclosed is the structure of a persistent current switch and a control method for the same. In the switch structure, a portion of a superconducting wire to be used as a switch is formed with slits such that the flow of current is controlled by the switch, to facilitate a transition between the superconducting state and the normal state of the superconducting wire. The structure of the persistent current switch includes a first slit longitudinally extending from a first point on one end of a superconducting wire to a second point and from a third point to a fourth point, the second, third, and fourth points being arranged sequentially in a longitudinal line, and second and third slits provided at opposite sides of a region between the second point and the third point where no first slit exists.Type: GrantFiled: October 10, 2007Date of Patent: October 11, 2011Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Hee-Gyoun Lee, Gye-Won Hong, Kyeong Dal Choi, Seung Wook Lee
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Publication number: 20110239443Abstract: Provided is a multiple transposition method for superconducting wire, by making each superconducting wire unit from second-generation superconducting wires that were firstly transposed and then transposing each superconducting wire unit in such a manner that the phase of each unit can be changed along the length, comprising preparing wires by making curves on superconducting wires in such a manner that the superconducting wires of a thin multiple layer grown epitaxially are slit in zigzags and then making the curves repeatedly and by machining the wires with a desired length; making first-transposed superconducting wire units by combining a plurality of the prepared wires such that curves of adjacent wires come in touch to each other and are superposed; preparing a superconducting wire unit bundle by arranging the first-transposed superconducting wires units and by locating a plurality of the first-transposed superconducting wire units in parallel along the length; and making a second transposition on the firType: ApplicationFiled: July 5, 2010Publication date: October 6, 2011Applicant: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Kyeong Dal Choi, Ji K wang Lee, Woo Seok Kim, Chan Park, Yung II Kim
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Publication number: 20110225340Abstract: An interface device for an emulator is disclosed. The interface device includes a connection unit, a transmission unit, and an interface unit. The connection unit receives data, to be used to emulate a logic, from a host computer, and transmits result data, output from the logic, to the host computer. The transmission unit receives the data from the connection unit and stores (writes) the data in the first area of a register array. If the result data is stored in the second area of the register array, the transmission unit reads the result data and transmits the result data to the connection unit. The interface unit includes at least one register array, outputs a clock, set using the data stored in the first area, to the logic, and stores the result data, output from the logic, in the second area.Type: ApplicationFiled: May 20, 2011Publication date: September 15, 2011Applicant: KOREA POLYTECHNIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATIONInventor: Jong Pil Choi
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Publication number: 20110218110Abstract: The present invention relates to a superconducting power transforming apparatus. The superconducting power transforming apparatus according to the present invention comprises a transformer housing having a transforming cable passing hole and filled with a liquid cooling means; a superconducting transformer housed in the transformer housing in a state that the superconducting transformer is immersed in the liquid cooling means; a tap changer housing having a tap changing cable passing hole and vacuum-sealed from outside; a power tap changer housed in the vacuum tap changer housing; and a cable linking pipe vacuum-sealed from the transformer housing and the tap changer housing, and linking the transforming cable passing hole with the tap changing passing hole in order that a transformer winding tap cable connecting the superconducting transformer and the power tap changer passes through.Type: ApplicationFiled: November 19, 2009Publication date: September 8, 2011Applicant: KOREA POLYTECHNIC UNIVERSITYInventors: Kyeong-Dal Choi, Ji-Kwang Lee, Woo-Seok Kim, Chan Park, Sun-Bok Choi
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Patent number: 7920977Abstract: A noncontact method for measuring currents flowing through superconductive wires connected in parallel is provided.Type: GrantFiled: March 6, 2008Date of Patent: April 5, 2011Assignee: Korea Polytechnic UniversityInventors: Kyeong Dal Choi, Ji Kwang Lee, Seung Wook Lee, Chan Park, Woo Seok Kim
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Publication number: 20100213823Abstract: An inorganic electroluminescent device includes; a lower electrode, a dielectric layer which is disposed on the lower electrode and includes a low dielectric material layer and a high dielectric material layer, an inorganic light emitting layer disposed on the dielectric layer, and an upper electrode disposed on the inorganic light emitting layer, wherein the low dielectric material layer has a greater dielectric constant than the high dielectric material layer.Type: ApplicationFiled: February 25, 2010Publication date: August 26, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA POLYTECHNIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATIONInventors: Tae-won JEONG, Seong-eui LEE, Shang-hyeun PARK, Min-jong BAE
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Patent number: 7672069Abstract: A linear motor and a camera module having the linear motor are provided. The linear motor includes: a piezoelectric substrate generating a vibration mode in a longitudinal direction on the basis of an applied voltage; first and second shafts coupled to both sides of the piezoelectric substrate with the piezoelectric substrate interposed therebetween; and a moving member coupled to at least one of the first and second shafts to be movable in the longitudinal direction of the first and second shafts and connected to a camera lens on one side. Accordingly, it is possible to remove a dead zone with a simple structure, to prevent an unnecessary increase in thickness, not to cause a stoppage at the time of moving a camera lens, to cause a small amount of tilt to enable a linear control, and to contribute to a decrease in thickness and a compactness of a mobile terminal.Type: GrantFiled: December 11, 2008Date of Patent: March 2, 2010Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Kwang Kim, Ki-Bum Park
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Publication number: 20090327592Abstract: Disclosed are a clustering device for a flash memory and a method thereof. The clustering device for a flash memory in accordance with an embodiment of the present invention can gather pages having similar update times and perform a write operation of the pages in a same block. Accordingly, the writing performance of the flash memory can be improved and the lifetime of the flash memory can be increased.Type: ApplicationFiled: June 29, 2009Publication date: December 31, 2009Applicant: KOREA POLYTECHNIC UNIVERSITY Industry and Academic Cooperation FoundationInventors: Ji Woong CHANG, Se Mi Park, Duck Ho Bae, Sang Wook Kim
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Publication number: 20090310564Abstract: Disclosed are a fast handover system and a method thereof. The fast handover method can include: allowing a mobile node (MN) to transmit a handover information message to a previous mobile access gateway (PMAG); allowing the PMAG to transmit a fast proxy binding update (FPBU) message to a local mobility anchor (LMA) on the basis of the handover information message received from the MN; allowing the LMA to transmit a handover initiation (HI) message including MN-ID and proxy-care-of address (CoA) of the PMAG to a new MAG (NMAG); transmitting a position update message to the NMAG if the MN is attached to a target BS that is connected to the NMAG; and allowing the NMAG to deliver a buffered packet to the MN.Type: ApplicationFiled: June 10, 2009Publication date: December 17, 2009Applicant: Korea Polytechnic University Industry Academic Cooperation FoundationInventors: Pyung Soo Kim, Eung Tea Kim, Seong Yong Kim
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Patent number: D626759Type: GrantFiled: July 23, 2009Date of Patent: November 9, 2010Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventor: Nam Joo Joh
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Patent number: D627577Type: GrantFiled: July 23, 2009Date of Patent: November 23, 2010Assignee: Korea Polytechnic University Industry Academic Cooperation FoundationInventor: Nam Joo Joh