Patents by Inventor Chung Hwan Lee
Chung Hwan Lee 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: 11935406Abstract: According to the present exemplary embodiments, provided are a traffic signal system and a vehicle which estimate a position and a moving direction of a vehicle in accordance with a driving status of the vehicle at an intersection and improve a positioning accuracy based on wired or wireless communication.Type: GrantFiled: June 20, 2022Date of Patent: March 19, 2024Assignee: UIF (University Industry Foundation), Yonsei UniversityInventors: Chung Yong Lee, Yeong Hwan Kim
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Patent number: 11666989Abstract: Provided is a laser crystallizing apparatus including a laser generator generating a laser beam and an optical system photo-converting the laser beam to make a converted laser beam. A beam transmitting unit includes a passage through which the converted laser beam is transmitted into the chamber. The beam transmitting unit includes a chamber window provided on the chamber to transmit the laser beam, and a shield window movably disposed below the chamber window to prevent a material generated in the chamber from reaching the chamber window.Type: GrantFiled: April 7, 2020Date of Patent: June 6, 2023Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hong Ro Lee, Chung Hwan Lee
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Publication number: 20230024115Abstract: The present disclosure relates to a high-strength hot-dip galvanized steel sheet having excellent surface quality and electrical resistance spot weldability, and a method for manufacturing the same. A galvanized steel sheet according to an aspect of the present disclosure is a galvanized steel sheet including a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a ratio (a/b) of a hardness of a surface layer portion (a) to a hardness of an internal portion (b) of the base steel sheet may be less than 0.95.Type: ApplicationFiled: December 18, 2020Publication date: January 26, 2023Applicant: POSCOInventors: Ki-Cheol Kang, Chung-Hwan Lee, Yong-Joo Kim, Kang-Min Lee, Kyoo-Young Lee
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Publication number: 20230018291Abstract: The present invention relates to a zinc plated steel sheet having excellent surface quality and spot weldability, and a manufacturing method therefore. A zinc plated steel sheet according to one aspect of the present invention comprises a base steel sheet and a zinc-based plating layer formed on the surface of the base steel sheet, wherein the GDOES profile of oxygen, which is measured in the depth direction from the surface of the base steel sheet, has a form in which a local minimum point and a local maximum point alternately appear in the depth direction from the surface, and the difference (a local maximum value—a local minimum value) between the oxygen concentration (a local minimum value) at the local minimum point and the oxygen concentration (a local maximum value) at the local maximum point can be 0.1 wt % or more.Type: ApplicationFiled: December 3, 2020Publication date: January 19, 2023Applicant: POSCOInventors: Ki-Cheol Kang, Sang-Ho Uhm, Chung-Hwan Lee
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Publication number: 20230002845Abstract: The present disclosure relates to a zinc plated steel sheet having excellent fatigue strength of electrical resistance spot welds and a method for manufacturing the same. According to an aspect of the present disclosure, a zinc plated steel sheet includes a base steel sheet and a zinc-based plating layer formed on a surface of the base steel sheet, wherein a concentration profile of one or two of oxygen, and silicon and manganese measured in a depth direction from the surface of the base steel sheet has a maximum point in the depth direction from the surface, and an absolute value of a difference between a depth at which the maximum point of the concentration profile of oxygen is formed and a depth at which the maximum point of the concentration profile of one of silicon and manganese is formed is 0.5 ?m or less.Type: ApplicationFiled: December 3, 2020Publication date: January 5, 2023Applicant: POSCOInventors: Ki-Cheol Kang, Chung-Hwan Lee
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Patent number: 10898972Abstract: A laser crystallizing apparatus includes a stage configured to receive a substrate, the stage including a plurality of groove lines each having a predetermined depth and width, and a plurality of control holes, each arranged in a respective groove line. Each control hole is provided with a negative pressure to hold the substrate to a surface of the stage or a positive pressure to release the substrate from the surface of the stage.Type: GrantFiled: May 31, 2016Date of Patent: January 26, 2021Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Chung Hwan Lee, Hong Ro Lee, Rae Chul Park
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Patent number: 10902652Abstract: A method of reducing an artifact by using structural similarity. The method includes at least: obtaining a plurality of input Computed Tomography (CT) images including a first CT image and a second CT image, generating an artifact map in which anatomical information is removed and artifacts information is remained, by subtracting the second. CT image from the first CT image, generating, by the computer, a structural similarity map between each CT image and the artifact map, and generating, by the computer, a final reconstructed image by comparing particular parts on images of a plurality of structural similarity maps with each other and selecting data of an input CT image which has been used to generate a particular part of a structural similarity map having a lowest degree of structural similarity, as data of a particular part on the final reconstructed image.Type: GrantFiled: July 30, 2018Date of Patent: January 26, 2021Assignees: THE ASAN FOUNDATION, UNIVERSITY OF ULSAN FOUNDATION FOR INDUSTRY COOPERATION, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jung Won Kwak, Sang Wook Lee, Byung Chul Cho, Chung Hwan Lee, Seungryong Cho, Changhwan Kim
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Publication number: 20200230741Abstract: Provided is a laser crystallizing apparatus including a laser generator generating a laser beam and an optical system photo-converting the laser beam to make a converted laser beam. A beam transmitting unit includes a passage through which the converted laser beam is transmitted into the chamber. The beam transmitting unit includes a chamber window provided on the chamber to transmit the laser beam, and a shield window movably disposed below the chamber window to prevent a material generated in the chamber from reaching the chamber window.Type: ApplicationFiled: April 7, 2020Publication date: July 23, 2020Inventors: HONG RO LEE, CHUNG HWAN LEE
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Patent number: 10475647Abstract: A laser crystallization device includes a laser oscillator, a stage, and a reflection unit. The stage is configured to support a substrate with a target film disposed on the substrate. The laser oscillator is configured to irradiate an incident laser beam on the target film. The stage is configured to move the substrate such that the incident laser beam scans the target film. The incident laser beam is reflected from the target film to generate a reflected laser beam. The reflection unit includes at least two reflection mirrors positioned at a path of the reflected laser beam. The reflection unit is configured to re-irradiate the reflected laser beam on the target film two or more times through a plurality of paths that are different from a path of the incident laser beam.Type: GrantFiled: March 22, 2017Date of Patent: November 12, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Hong Ro Lee, Rae Chul Park, Chung Hwan Lee
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Publication number: 20190043225Abstract: Disclosed are a method of reducing artifacts by using structural similarity and a program thereof. The method includes obtaining a plurality of input CT images by a computer, generating an artifact map by comparing the plurality of input CT images with each other by the computer, generating a structural similarity map between each CT image and the metal artifact map by the computer, and generating, by the computer, a final reconstructed image by comparing specific points on a plurality of structural similarity maps with each other and applying data of an input CT image used to generate a structural similarity map having a lowest degree of structural similarity as data of a specific point.Type: ApplicationFiled: July 30, 2018Publication date: February 7, 2019Applicants: THE ASAN FOUNDATION, UNIVERSITY OF ULSAN FOUNDATION FOR INDUSTRY COOPERATION, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jung Won KWAK, Sang Wook LEE, Byung Chul CHO, Chung Hwan LEE, Seungryong CHO, Changhwan KIM
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Patent number: 10181413Abstract: A laser crystallization apparatus includes a laser generator that generates a laser beam including a plurality of line beams that are parallel to each other. An optical system includes a plurality of lenses and mirrors, wherein the optical system optically converts the generated laser beam to a converted laser beam. A chamber includes a stage and a substrate disposed on the stage, wherein a laser-crystallized thin film is formed on the substrate when the substrate is irradiated by the converted laser beam. A line focus adjuster that adjusts a line focus and a final focus of the plurality of line beams passing through the optical system, wherein the substrate is irradiated by the plurality of line beams at the final focus of the plurality of line beams.Type: GrantFiled: April 26, 2016Date of Patent: January 15, 2019Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Chung Hwan Lee, Hong Ro Lee
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Patent number: 9847507Abstract: A display panel includes: a substrate including a first substrate layer which includes a glass material and a second substrate layer contacting the first substrate layer and which includes a polymer material; a thin film transistor disposed on the substrate; and a light emitting element disposed on the thin film transistor.Type: GrantFiled: August 26, 2016Date of Patent: December 19, 2017Assignee: Samsung Display Co., Ltd.Inventors: Hong Ro Lee, Chung Hwan Lee
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Publication number: 20170278708Abstract: A laser crystallization device includes a laser oscillator, a stage, and a reflection unit. The stage is configured to support a substrate with a target film disposed on the substrate. The laser oscillator is configured to irradiate an incident laser beam on the target film. The stage is configured to move the substrate such that the incident laser beam scans the target film. The incident laser beam is reflected from the target film to generate a reflected laser beam. The reflection unit includes at least two reflection mirrors positioned at a path of the reflected laser beam. The reflection unit is configured to re-irradiate the reflected laser beam on the target film two or more times through a plurality of paths that are different from a path of the incident laser beam.Type: ApplicationFiled: March 22, 2017Publication date: September 28, 2017Inventors: Hong Ro LEE, Rae Chul PARK, Chung Hwan LEE
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Publication number: 20170120375Abstract: A laser crystallizing apparatus includes a stage configured to receive a substrate, the stage including a plurality of groove lines each having a predetermined depth and width, and a plurality of control holes, each arranged in a respective groove line. Each control hole is provided with a negative pressure to hold the substrate to a surface of the stage or a positive pressure to release the substrate from the surface of the stage.Type: ApplicationFiled: May 31, 2016Publication date: May 4, 2017Inventors: CHUNG HWAN LEE, HONG RO LEE, RAE CHUL PARK
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Publication number: 20170110685Abstract: A display panel includes: a substrate including a first substrate layer which includes a glass material and a second substrate layer contacting the first substrate layer and which includes a polymer material; a thin film transistor disposed on the substrate; and a light emitting element disposed on the thin film transistor.Type: ApplicationFiled: August 26, 2016Publication date: April 20, 2017Inventors: Hong Ro Lee, Chung Hwan Lee
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Publication number: 20170098562Abstract: A laser crystallization apparatus includes a laser generator that generates a laser beam including a plurality of line beams that are parallel to each other. An optical system includes a plurality of lenses and mirrors, wherein the optical system optically converts the generated laser beam to a converted laser beam. A chamber includes a stage and a substrate disposed on the stage, wherein a laser-crystallized thin film is formed on the substrate when the substrate is irradiated by the converted laser beam. A line focus adjuster that adjusts a line focus and a final focus of the plurality of line beams passing through the optical system, wherein the substrate is irradiated by the plurality of line beams at the final focus of the plurality of line beams.Type: ApplicationFiled: April 26, 2016Publication date: April 6, 2017Inventors: CHUNG HWAN LEE, HONG RO LEE
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Publication number: 20170075106Abstract: An exemplary embodiment of the present invention provides a laser crystallization apparatus including a laser generator configured to emit a laser beam. An optical system includes a plurality of lenses and mirrors. The optical system is configured to generate a converted laser beam by optically converting the emitted laser beam. A chamber includes a stage configured to support a substrate. A compensator is configured to uniformly compensate a path of the laser beam that passes toward the substrate by controlling a position of a final-end mirror disposed at an end of the optical system that is opposite to the laser generator.Type: ApplicationFiled: April 15, 2016Publication date: March 16, 2017Inventors: HONG RO LEE, Kl WOON PARK, CHUNG HWAN LEE
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Publication number: 20170057019Abstract: Provided is a laser crystallizing apparatus including a laser generator generating a laser beam and an optical system photo-converting the laser beam to make a converted laser beam. A beam transmitting unit includes a passage through which the converted laser beam is transmitted into the chamber. The beam transmitting unit includes a chamber window provided on the chamber to transmit the laser beam, and a shield window movably disposed below the chamber window to prevent a material generated in the chamber from reaching the chamber window.Type: ApplicationFiled: April 18, 2016Publication date: March 2, 2017Inventors: HONG RO LEE, CHUNG HWAN LEE
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Publication number: 20140245582Abstract: The present invention is used to manufacture a camshaft which is used in an engine for a vehicle. In detail, the present invention relates to an apparatus for assembling a cam having a depression with a shaft having a protrusion.Type: ApplicationFiled: September 27, 2012Publication date: September 4, 2014Applicant: Mibo Co., Ltd.Inventors: Yong Kyoon Kim, Ick Doo Eom, Chung Hwan Lee, Man Yun Go, In Chul Yu
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Patent number: 8749488Abstract: Disclosed herein are an apparatus and method for providing a contactless Graphical User Interface (GUI). The apparatus for providing a contactless GUI includes a basic information management unit, a pointer tracking unit, and a mouse event management unit. The basic information management unit receives finger image information, and generates basic pointer information for a mouse pointer service. The pointer tracking unit analyzes the finger image information based on the basic pointer information, and generates a mouse operation event by tracking a mouse operation in order to control a mouse pointer based on results of the analysis. The mouse event management unit analyzes the mouse operation event, and generates an operation message corresponding to the mouse operation. The pointer tracking unit tracks the mouse operation by calculating the movement distance of the tips of a thumb and an index finger based on the finger image information.Type: GrantFiled: December 2, 2011Date of Patent: June 10, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Chung-Hwan Lee, Seung-Woo Nam