Patents by Inventor Woon Chong
Woon Chong 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: 20220180509Abstract: Diagnostic system and method for eye disease detection using a smartphone. At least some of the example embodiments are methods including capturing, by way of a camera lens on a device, an image of an eye to create a raw specimen, wherein the image of the eye comprises a series of concentric rings on a cornea of the eye; processing the raw specimen to create a processed specimen; performing edge detection on the processed specimen to detect a boundary of a cornea; determining a topography of the eye based on the series of concentric rings; and classifying the processed specimen as including an eye disease, based on the determining the topography.Type: ApplicationFiled: March 6, 2020Publication date: June 9, 2022Applicant: TEXAS TECH UNIVERSITY SYSTEMInventors: Jo Woon Chong, Behnam Askarian, Fatemehsadat Tabei
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Patent number: 10952604Abstract: Diagnostic tool for eye disease detection using a smartphone. At least some of the example embodiments are methods including capturing, by way of a camera lens on a device, an image of an eye to create a raw specimen; processing the raw specimen to create a processes specimen; performing edge detection on the processed specimen to detect a boundary of a cornea; extracting a region of interest of the cornea; identifying a boundary of the region of interest using a boundary tracing technique to identify a second boundary; analyzing the second boundary of the region of interest, by measuring a slope of the second boundary; and classifying the region of interest as including an eye disease, based on the analyzing the second boundary.Type: GrantFiled: March 6, 2019Date of Patent: March 23, 2021Assignee: TEXAS TECH UNIVERSITY SYSTEMInventors: Behnam Askarian, Jo Woon Chong, Fatemehsadat Tabei
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Patent number: 10653362Abstract: A pulse oximeter embedded with a motion and noise artifact (MNA) detection algorithm based on extraction of time-varying spectral features that are unique to the clean and corrupted components.Type: GrantFiled: January 29, 2016Date of Patent: May 19, 2020Assignee: Wavefront Research Inc.Inventors: Ki H. Chon, Jo Woon Chong, Duy Dao, Hamed Salehizadeh
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Publication number: 20190274536Abstract: Diagnostic tool for eye disease detection using a smartphone. At least some of the example embodiments are methods including capturing, by way of a camera lens on a device, an image of an eye to create a raw specimen; processing the raw specimen to create a processes specimen; performing edge detection on the processed specimen to detect a boundary of a cornea; extracting a region of interest of the cornea; identifying a boundary of the region of interest using a boundary tracing technique to identify a second boundary; analyzing the second boundary of the region of interest, by measuring a slope of the second boundary; and classifying the region of interest as including an eye disease, based on the analyzing the second boundary.Type: ApplicationFiled: March 6, 2019Publication date: September 12, 2019Applicant: Texas Tech University SystemInventors: Behnam Askarian, Jo Woon Chong, Fatemehsadat Tabei
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Publication number: 20160367198Abstract: Systems and methods that can distinguish clean from corrupted PPG signals under various types of motions and reconstruct the MNA contaminated data segments, such that biological parameters, e.g., heart rates and SpO2 values, can be accurately estimated, are disclosed.Type: ApplicationFiled: February 26, 2015Publication date: December 22, 2016Inventors: Ki H. Chon, Jo Woon Chong, Yitzhak Mendelson, S.M.A. Salehizadeh, Duy K. Dao
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Patent number: 8588190Abstract: A multiple access digital communication method in ultra-wideband (UWB) radio access network is provided. More specifically, a multiple access technique in UWB communication channels is provided where UWB communication channels can be more efficiently used and collisions between multiple access user nodes can be more effectively avoided when the channels have a great multiple path fading. The digital communication method for use in an uplink in a UWB communication system includes the steps of: receiving data symbols from respective nodes, in which the data symbols are transmitted according to respective orthogonal time hopping patterns; checking whether there is a collision of the orthogonal time hopping patterns; and decoding the data symbols depending on whether data symbols of nodes involved in the collision of the orthogonal time hopping patterns are the same.Type: GrantFiled: March 28, 2006Date of Patent: November 19, 2013Assignee: Pantech Co., Ltd.Inventors: Dan Keun Sung, Bang Chul Jung, Ho Young Hwang, Chang Yong Jung, Young Jun Hong, Jo Woon Chong
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Patent number: 8559572Abstract: An Ultra-Wideband (UWB) wireless communication system in a multi-user environment determines a threshold value to eliminate a signal pulse affected by a near-interference from among a plurality of signal pulses transmitted a number of times. A method for controlling an interference includes receiving the signal pulses, calculating a correlation value by applying a predetermined correlation mask to the signal pulses, determining a threshold value by referring to the number of times that the signal pulses are transmitted, a signal-to-interference-and-noise ratio, and information about a ratio of a near-interference to a far-interference, and eliminating signal pulses having a correlation value greater than the threshold value. The correlation values that are not greater than the threshold value are summed to detect a bit corresponding to each pulse signal.Type: GrantFiled: January 3, 2012Date of Patent: October 15, 2013Assignee: Pantech Co., Ltd.Inventors: Dan Keun Sung, Jo Woon Chong, Bang Chul Jung, Min Jeong Kim
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Patent number: 8358707Abstract: Provided is a communication system for ultra wide band impulse communication, and more particularly, to a communication apparatus and method that can be used in a sensor network or a low-rate wireless personal area network. To be more specific, the present research suggests a transmitter employing multi-coded bi-orthogonal pulse position modulation/demodulation and a method thereof.Type: GrantFiled: March 12, 2005Date of Patent: January 22, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Hyung-Soo Lee, Cheolhyo Lee, Dong-Jo Park, Sung-Yoon Jung, Mi-Kyung Oh, Dan-Keun Sung, Ki-Ho Kil, Chang-Yong Jung, Jo-Woon Chong, Min-Jeong Kim, Young-Jun Hong, Bang-Chul Jung, Min-Sheo Choi
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Publication number: 20120099619Abstract: An Ultra-Wideband (UWB) wireless communication system in a multi-user environment determines a threshold value to eliminate a signal pulse affected by a near-interference from among a plurality of signal pulses transmitted a number of times. A method for controlling an interference includes receiving the signal pulses, calculating a correlation value by applying a predetermined correlation mask to the signal pulses, determining a threshold value by referring to the number of times that the signal pulses are transmitted, a signal-to-interference-and-noise ratio, and information about a ratio of a near-interference to a far-interference, and eliminating signal pulses having a correlation value greater than the threshold value. The correlation values that are not greater than the threshold value are summed to detect a bit corresponding to each pulse signal.Type: ApplicationFiled: January 3, 2012Publication date: April 26, 2012Applicant: Pantech Co., Ltd.Inventors: Dan Keun SUNG, Jo Woon CHONG, Bang Chul JUNG, Min Jeong KIM
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Patent number: 8102952Abstract: An Ultra-Wideband (UWB) wireless communication system in a multi-user environment determines a threshold value to eliminate a signal pulse affected by a near-interference from among a plurality of signal pulses transmitted a number of times. A method for controlling an interference includes receiving the signal pulses, calculating a correlation value by applying a predetermined correlation mask to the signal pulses, determining a threshold value by referring to the number of times that the signal pulses are transmitted, a signal-to-interference-and-noise ratio, and information about a ratio of a near-interference to a far-interference, and eliminating signal pulses having a correlation value greater than the threshold value. The correlation values that are not greater than the threshold value are summed to detect a bit corresponding to each pulse signal.Type: GrantFiled: April 10, 2007Date of Patent: January 24, 2012Assignee: Pantech Co., Ltd.Inventors: Dan Keun Sung, Jo Woon Chong, Bang Chul Jung, Min Jeong Kim
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Patent number: 7826475Abstract: Provided is a radio communication system for ultra wideband (UWB) impulse communications and a radio communication apparatus and method thereof. The present patent provides a radio communication system that can minimize power consumption by eliminating a need for carrier detection and sharing transmission/reception time information in UWB impulse communications. The system includes a network coordinator; and one or more devices communicating on a superframe basis in subordination to the network coordinator. The devices perform data transmission/reception in predetermined time slots and then they are inactivated to thereby reduce power consumption.Type: GrantFiled: November 1, 2005Date of Patent: November 2, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Hyung-Soo Lee, Cheol-Hyo Lee, Dan-Keun Sung, Chang-Yong Jung, Jo-Woon Chong, Min-Jeong Kim, Dong-Jo Park, Young-Jun Hong, Bang-Chul Jung, Sung-Yoon Jung, Mi-Kyung Oh, Ki-Ho Kil
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Publication number: 20090067389Abstract: Provided is a radio communication system for ultra wideband (UWB) impulse communications and a radio communication apparatus and method thereof. The present patent provides a radio communication system that can minimize power consumption by eliminating a need for carrier detection and sharing transmission/reception time information in UWB impulse communications. The system includes a network coordinator; and one or more devices communicating on a superframe basis in subordination to the network coordinator. The devices perform data transmission/reception in predetermined time slots and then they are inactivated to thereby reduce power consumption.Type: ApplicationFiled: November 1, 2005Publication date: March 12, 2009Inventors: Hyung-Soo Lee, Cheol-Hyo Lee, Dan-Keun Sung, Chang-Yong Jung, Jo-Woon Chong, Min-Jeong Kim, Dong-Jo Park, Young-Jun Hong, Bang-Chul Jung, Sung-Yoon Jung, Mi-Kyung Oh, Ki-Ho Kil
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Publication number: 20090016309Abstract: Provided is a communication system for ultra wide band impulse communication, and more particularly, to a communication apparatus and method that can be used in a sensor network or a low-rate wireless personal area network. To be more specific, the present research suggests a transmitter employing multi-coded bi-orthogonal pulse position modulation/demodulation and a method thereof.Type: ApplicationFiled: March 12, 2005Publication date: January 15, 2009Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Hyung-Soo Lee, Cheolhyo Lee, Dong-Jo Park, Sung-Yoon Jung, Mi-Kyung Oh, Dan-Keun Sung, Ki-Ho Kil, Chang-Yong Jung, Jo-Woon Chong, Min-Jeong Kim, Young-Jun Hong, Bang-Chul Jung, Min-Sheo Choi
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Publication number: 20080165746Abstract: A multiple access digital communication method in ultra-wideband (UWB) radio access network is provided. More specifically, a multiple access technique in UWB communication channels is provided where UWB communication channels can be more efficiently used and collisions between multiple access user nodes can be more effectively avoided when the channels have a great multiple path fading. The digital communication method for use in an uplink in a UWB communication system includes the steps of: receiving data symbols from respective nodes, in which the data symbols are transmitted according to respective orthogonal time hopping patterns; checking whether there is a collision of the orthogonal time hopping patterns; and decoding the data symbols depending on whether data symbols of nodes involved in the collision of the orthogonal time hopping patterns are the same.Type: ApplicationFiled: March 28, 2006Publication date: July 10, 2008Applicant: PANTECH CO., LTD.Inventors: Dan Keun Sung, Bang Chul Jung, Ho Young Hwang, Chang Yong Jung, Young Jun Hong, Jo Woon Chong
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Publication number: 20080084917Abstract: An Ultra-Wideband (UWB) wireless communication system in a multi-user environment determines a threshold value to eliminate a signal pulse affected by a near-interference from among a plurality of signal pulses transmitted a number of times. A method for controlling an interference includes receiving the signal pulses, calculating a correlation value by applying a predetermined correlation mask to the signal pulses, determining a threshold value by referring to the number of times that the signal pulses are transmitted, a signal-to-interference-and-noise ratio, and information about a ratio of a near-interference to a far-interference, and eliminating signal pulses having a correlation value greater than the threshold value. The correlation values that are not greater than the threshold value are summed to detect a bit corresponding to each pulse signal.Type: ApplicationFiled: April 10, 2007Publication date: April 10, 2008Applicant: Pantech Co., Ltd.Inventors: Dan Keun Sung, Jo Woon Chong, Bang Chul Jung, Min Jeong Kim
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Publication number: 20060067789Abstract: A bearing is provided for use in connection with expansion joint systems. The structure of the bearing permits improved motion of, and provides improved support for, the components of the expansion joint system that are supported on or engaged with the bearing. The bearing is particularly useful for expansion joint systems in roadway constructions, bridge constructions, and architectural structures.Type: ApplicationFiled: September 24, 2004Publication date: March 30, 2006Applicant: Watson Bowman Acme CorporationInventors: Paul Bradford, Woon Chong
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Publication number: 20060019388Abstract: The invention relates to a bioreactor comprising a chamber for containing cells or tissue cultures within a culture medium. The bioreactor also comprises a detector capable of detecting a change in one or more metabolites associated with growth of the cell or tissue cultures within the chamber and a chamber drive capable of rotating the chamber at a first speed about a first axis and a second speed about a second axis, the second axis being disposed at an angle relative to the first axis. In use, the magnitude of the first speed and the second speed are independently variable of each other.Type: ApplicationFiled: May 6, 2005Publication date: January 26, 2006Inventors: Dietmar Hutmacher, Swee Teoh, Manoja Ranawake, Woon Chong, Keng Ting, Kay Chua, Than Myint, Chum Puah, Toom Foo, Jan-Thorsten Schantz