Patents by Inventor Hyung Chul Park
Hyung Chul Park 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: 20240145655Abstract: A display device is disclosed that includes: a substrate; a first conductive layer disposed on the substrate; a first insulating layer positioned on the first conductive layer and having an undercut structure forming an opening; a first capacitor electrode including a portion formed in the undercut structure; a second capacitor electrode including a portion formed in the undercut structure and overlapping the second capacitor electrode to form a capacitor; and a second insulating layer including a portion formed in the undercut structure and positioned between the first capacitor electrode and the second capacitor electrode to function as a dielectric of the capacitor.Type: ApplicationFiled: September 5, 2023Publication date: May 2, 2024Inventors: Joon Seok PARK, So Young KOO, Hyung Jun KIM, Geun Chul PARK
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Patent number: 9355286Abstract: An extended Pulse-Interval Encoding (PIE) modulating method in a Radio Frequency IDentification (RFID) system, wherein the method modulates 2-bit transmitted data and comprises: adjusting a length of a symbol according to a value of the first bit of the transmitted data; and adjusting a length of an energy transfer waiting section according to a value of the second bit of the transmitted data.Type: GrantFiled: December 2, 2014Date of Patent: May 31, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang Hyun Mo, Hyun Seok Kim, Kyu Won Han, Jae Young Jung, Chan Won Park, Hyung Chul Park, Cheol Sig Pyo
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Publication number: 20150161420Abstract: An extended Pulse-Interval Encoding (PIE) modulating method in a Radio Frequency IDentification (RFID) system, wherein the method modulates 2-bit transmitted data and comprises: adjusting a length of a symbol according to a value of the first bit of the transmitted data; and adjusting a length of an energy transfer waiting section according to a value of the second bit of the transmitted data.Type: ApplicationFiled: December 2, 2014Publication date: June 11, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: SANG HYUN MO, HYUN SEOK KIM, KYU WON HAN, JAE YOUNG JUNG, CHAN WON PARK, HYUNG CHUL PARK, CHEOL SIG PYO
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Publication number: 20150009014Abstract: A tag transmitting apparatus of a passive RFID (radio frequency identification) system generates a pilot tone, a preamble, and an SFD (start frame delimiter) and transmits the pilot, the preamble, and the SFD, using one of a plurality of square waves.Type: ApplicationFiled: April 15, 2014Publication date: January 8, 2015Applicants: Electronics and Telecommunications Research Institute, Seoul National University of Science & Technology, Foundation for Research & BusinessInventors: Sang Hyun MO, Ji-Hoon BAE, Hyung Chul PARK, Jae-young JUNG, Hoe-Sung YANG, Chan-Won PARK, Cheol Sig PYO
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Patent number: 8890658Abstract: An RFID system using an M pulse amplitude modulation (M-PAM) or M quadrature amplitude modulation (M-QAM) scheme using a plurality of load-modulators, a plurality of antennas, and a communication method thereof are provided. The RFID system includes: an RFID tag; and a reader device communicating with the RFID device, wherein the RFID tag includes: N load-modulators an N antennas communicating with the reader device in any one scheme of M-pulse amplitude modulation (M-PAM) and M-quadrature amplitude modulation (M-QAM) in which modulation of an M level is performed and operated corresponding to the M level.Type: GrantFiled: August 14, 2012Date of Patent: November 18, 2014Assignees: Electronics and Telecommunications Research Institute, Seoul National University of Technology Center for Industry CollaborationInventors: Ji Hoon Bae, Chan Won Park, Hyung Chul Park, Jong Suk Chae, Cheol Sig Pyo
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Publication number: 20130162401Abstract: A tag transmitting apparatus of a passive RFID system generates a plurality of orthogonal square waves, converts tag data to a plurality of parallel data, and transmits the plurality of parallel data to a reader using a plurality of square waves as a subcarrier.Type: ApplicationFiled: September 13, 2012Publication date: June 27, 2013Applicants: SEOUL NATIONAL UNIVERSITY OF SCIENCE & TECHNOLOGY, FOUNDATION FOR RESEARCH & BUSINESS, ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Ji-Hoon Bae, Chan-Won Park, Hyung Chul Park, Jong-Suk Chae, Cheol Sig Pyo
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Publication number: 20130106580Abstract: An RFID system using an M pulse amplitude modulation (M-PAM) or M quadrature amplitude modulation (M-QAM) scheme using a plurality of load-modulators, a plurality of antennas, and a communication method thereof are provided. The RFID system includes: an RFID tag; and a reader device communicating with the RFID device, wherein the RFID tag includes: N load-modulators an N antennas communicating with the reader device in any one scheme of M-pulse amplitude modulation (M-PAM) and M-quadrature amplitude modulation (M-QAM) in which modulation of an M level is performed and operated corresponding to the M level.Type: ApplicationFiled: August 14, 2012Publication date: May 2, 2013Applicants: SEOUL NATIONAL UNIVERSITY OF TECHNOLOGY CENTER FOR INDUSTRY COLLABORATION, ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Ji Hoon Bae, Chan Won Park, Hyung Chul Park, Jong Suk Chae, Cheol Sig Pyo
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Patent number: 8300744Abstract: The present invention relates to an apparatus for rejecting images in a receiver. The apparatus of the present invention relates to an apparatus for rejecting image signals in a receiver of a direct conversion structure and comprises a signal mismatch compensation unit configured to detect gain error and phase error between an In-phase (I) signal and a Quadrature (Q) signal received through the receiver, to reject image signals existing in the I and Q signals, and to output a result. The signal mismatch compensation unit detects the gain error and the phase error using an adaptive step method of reducing the step size of the gain error and the phase error step by step whenever the gain error and the phase error are converged. According to the present invention, high image rejection ratio is achieved and the adaptation time taken to obtain a high image rejection ratio is reduced simultaneously.Type: GrantFiled: January 28, 2010Date of Patent: October 30, 2012Assignee: Korea Advanced Institute of Science and TechnologyInventors: Sun a Kim, Dae-Young Yoon, Sang-Gug Lee, Hyung-Chul Park, Jeong-seon Lee
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Patent number: 8265120Abstract: A parallel sequence spread spectrum type chaotic signal transmission device is disclosed to convert a serial data signal into a parallel data signal and transmit a chaotic signal according to the converted data signal. The parallel sequence spread spectrum type chaotic signal transmission device includes: a signal converting unit that converts serial data desired to be transmitted into parallel data having a pre-set unit; a chaotic signal generating unit that generates a pre-set chaotic signal; and an amplifying unit that amplifies the chaotic signal from the chaotic signal generating unit according to the data which has been converted by the signal converting unit.Type: GrantFiled: November 11, 2009Date of Patent: September 11, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Chang Soo Yang, Hyung Chul Park, Wan Cheol Yang, Sang Yub Lee
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Publication number: 20110182388Abstract: The present invention relates to an apparatus for rejecting images in a receiver. The apparatus of the present invention relates to an apparatus for rejecting image signals in a receiver of a direct conversion structure and comprises a signal mismatch compensation unit configured to detect gain error and phase error between an In-phase (I) signal and a Quadrature (Q) signal received through the receiver, to reject image signals existing in the I and Q signals, and to output a result. The signal mismatch compensation unit detects the gain error and the phase error using an adaptive step method of reducing the step size of the gain error and the phase error step by step whenever the gain error and the phase error are converged. According to the present invention, high image rejection ratio is achieved and the adaptation time taken to obtain a high image rejection ratio is reduced simultaneously.Type: ApplicationFiled: January 28, 2010Publication date: July 28, 2011Applicant: Korea Advanced Institute of Science and TechnologyInventors: Sun a. Kim, Dae-Young Yoon, Sang-Gug Lee, Hyung-Chul Park, Jeongseon Lee
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Patent number: 7920004Abstract: There is provided an apparatus for duty cycle correction. The apparatus for duty cycle correction comprises a moving sum unit performing a moving sum calculation with respect to the square-wave signal and outputting the moving sum signal subjected to moving sum calculation, a comparison unit comparing the moving sum signal with a predetermined threshold voltage, outputting a high signal or low signal, a mean value calculation unit calculating the mean value of an output signal outputted from the comparison unit, the output signal being included in a section having a period integer times greater than that of the square-wave signal, and a threshold voltage control unit comparing the mean value with a middle value, increasing the threshold voltage when the mean value is greater than the middle value, and decreasing the threshold voltage when the mean value is less than the middle value.Type: GrantFiled: September 16, 2009Date of Patent: April 5, 2011Assignee: Phychips, Inc.Inventors: Jin-Ho Ko, Sang-Hyun Cho, Hyung-Chul Park, Dae-Sik Park
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Patent number: 7889817Abstract: The present invention relates to a radio frequency signal receiver, and more particularly, to a radio frequency signal receiver of a communication system, in which local devices exchange a radio frequency signal with each other. The object of the present invention is to provide a radio frequency signal receiver that exactly restores data from a received signal without a complex circuit restoring a phase of a received signal. It is another object of the present invention to provide a radio frequency signal receiver that eliminates noise when the noise is included in the received signal, estimates an exact data rate of the received signal, and exactly restores received information based on the estimated data rate thereof.Type: GrantFiled: June 3, 2008Date of Patent: February 15, 2011Assignee: PHYCHIPS Inc.Inventor: Hyung-Chul Park
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Patent number: 7824743Abstract: Embodiments described herein provide a method for forming two titanium nitride materials by different PVD processes, such that a metallic titanium nitride layer is initially formed by a PVD process in a metallic mode and a titanium nitride retarding layer is formed over a portion of the metallic titanium nitride layer by a PVD process in a poison mode. Subsequently, a first aluminum layer, such as an aluminum seed layer, may be selectively deposited on exposed portions of the metallic titanium nitride layer by a CVD process. Thereafter, a second aluminum layer, such as an aluminum bulk layer, may be deposited on exposed portions of the first aluminum layer and the titanium nitride retarding layer during an aluminum PVD process.Type: GrantFiled: September 28, 2007Date of Patent: November 2, 2010Assignee: Applied Materials, Inc.Inventors: Wei Ti Lee, Yen-Chih Wang, Mohd Fadzli Anwar Hassan, Ryeun Kwan Kim, Hyung Chul Park, Ted Guo, Alan A. Ritchie
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Publication number: 20100246724Abstract: [Problem] The present invention relates to a radio frequency signal receiver, and more particularly, to a radio frequency signal receiver of a communication system, in which local devices exchange a radio frequency signal with each other. The object of the present invention is to provide a radio frequency signal receiver that exactly restores data from a received signal without a complex circuit restoring a phase of a received signal. It is another object of the present invention to provide a radio frequency signal receiver that eliminates noise when the noise is included in the received signal, estimates an exact data rate of the received signal, and exactly restores received information based on the estimated data rate thereof.Type: ApplicationFiled: June 3, 2008Publication date: September 30, 2010Applicant: PHYCHIPS INC.Inventor: Hyung-Chul Park
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Publication number: 20100142588Abstract: A parallel sequence spread spectrum type chaotic signal transmission device is disclosed to convert a serial data signal into a parallel data signal and transmit a chaotic signal according to the converted data signal. The parallel sequence spread spectrum type chaotic signal transmission device includes: a signal converting unit that converts serial data desired to be transmitted into parallel data having a pre-set unit; a chaotic signal generating unit that generates a pre-set chaotic signal; and an amplifying unit that amplifies the chaotic signal from the chaotic signal generating unit according to the data which has been converted by the signal converting unit.Type: ApplicationFiled: November 11, 2009Publication date: June 10, 2010Applicants: Samsung Electro-Mechanics Co., Ltd., Hanbat National University Industry-Academic Cooperation FoundationInventors: Chang Soo Yang, Hyung Chul Park, Wan Cheol Yang, Sang Yub Lee
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Publication number: 20100144298Abstract: Provided is an apparatus and method for generating I/Q signals in a multi-port network, which can generate I/Q signals with accurate coordinates and sizes by repeatedly controlling the coordinates and size of an initial parameter in accordance with a predetermined reference condition. The I/Q signal generating apparatus of a multi-port network includes a multi-port network unit, a signal generation unit, and a control unit. The multi-port network unit converts a receive (RX) signal into a plurality of phase signals with different phases in accordance with a predetermined reference signal. The signal generation unit restores original data on the basis of the power of the phase signals received from the multi-port network unit. The control unit controls the restoration operation of the signal generation unit to be repeated so that the original data restored by the signal generation unit satisfies a predetermined reference range.Type: ApplicationFiled: November 13, 2009Publication date: June 10, 2010Applicants: Samsung Electro-Mechanics Co., Ltd., Hanbat National University-Academic Cooperation FoundationInventors: Chang Soo YANG, Hyung Chul Park, Sang Yub Lee
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Publication number: 20100109731Abstract: There is provided an apparatus for duty cycle correction. The apparatus for duty cycle correction comprises a moving sum unit performing a moving sum calculation with respect to the square-wave signal and outputting the moving sum signal subjected to moving sum calculation, a comparison unit comparing the moving sum signal with a predetermined threshold voltage, outputting a high signal or low signal, a mean value calculation unit calculating the mean value of an output signal outputted from the comparison unit, the output signal being included in a section having a period integer times greater than that of the square-wave signal, and a threshold voltage control unit comparing the mean value with a middle value, increasing the threshold voltage when the mean value is greater than the middle value, and decreasing the threshold voltage when the mean value is less than the middle value.Type: ApplicationFiled: September 16, 2009Publication date: May 6, 2010Inventors: Jin-Ho Ko, Seng-Hyun Cho, Hyung-Chul Park, Dae-Sik Park
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Publication number: 20090087585Abstract: Embodiments described herein provide a method for forming two titanium nitride materials by different PVD processes, such that a metallic titanium nitride layer is initially formed by a PVD process in a metallic mode and a titanium nitride retarding layer is formed over a portion of the metallic titanium nitride layer by a PVD process in a poison mode. Subsequently, a first aluminum layer, such as an aluminum seed layer, may be selectively deposited on exposed portions of the metallic titanium nitride layer by a CVD process. Thereafter, a second aluminum layer, such as an aluminum bulk layer, may be deposited on exposed portions of the first aluminum layer and the titanium nitride retarding layer during an aluminum PVD process.Type: ApplicationFiled: September 28, 2007Publication date: April 2, 2009Inventors: WEI TI LEE, Yen-Chih Wang, Mohd Fadzli Anwar Hassan, Ryeun Kwan Kim, Hyung Chul Park, Ted Guo, Alan A. Ritchie
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Publication number: 20070230701Abstract: The invention relates to a chaotic signal transmitter using a pulse shaping method to amplitude-modulate a chaotic signal according to a transmission signal, thereby transmitting the chaotic signal having various slopes. The chaotic signal transmitter includes a waveform converter for blocking high frequency component of the transmission signal to convert the waveform of the transmission signal and a chaotic signal generator for generating the chaotic signal. The chaotic signal transmitter further includes a modulator for amplitude-modulating the chaotic signal according to the waveform-converted transmission signal.Type: ApplicationFiled: March 22, 2007Publication date: October 4, 2007Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Sang Gyu PARK, Hyung Chul PARK, Chang Soo YANG
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Publication number: 20070223700Abstract: The invention relates to a chaotic transmitter which can precisely measure a distance between the transmitter and a receiver, thereby efficiently regulating transmission power according to the distance. The chaotic signal transmitter includes a chaotic signal generator for generating a chaotic signal and a quantizer for quantizing a transmission signal with a predetermined number of steps. The chaotic signal transmitter also includes a modulation controller for controlling the modulation of the chaotic signal according to the quantized transmission signal. The chaotic signal transmitter further includes a modulator for modulating the chaotic signal from the chaotic signal generator in a multiple OOK mode to output a plurality of chaotic signals and a combiner for combining the plurality of modulated chaotic signals.Type: ApplicationFiled: March 22, 2007Publication date: September 27, 2007Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Kwang Du LEE, Hyung Chul PARK, Chang Soo YANG