Patents by Inventor Young-Hoon Cho
Young-Hoon Cho 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: 10741118Abstract: Provided are a light-emitting diode (LED) display device and a method of operating the LED display device determining whether a line flicker will occur based on a level of an input image signal, obtaining an LED line scan order corresponding to the level of the input image signal and brightness according to the input image signal based on the determining, and driving at least one LED line based on the LED line scan order. An LED line scan order may be adjusted according to a level of an input/output image signal in an LED display device so as to reduce occurrence of a line flicker phenomenon in all levels of the input/output image signal.Type: GrantFiled: November 3, 2017Date of Patent: August 11, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong Park, Sang-kyun Im, Young-hoon Cho, Hye-rin Choi
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Patent number: 10708533Abstract: A display apparatus includes a signal receiver configured to receive an image signal having a plurality of gradations; a display configured to display an image based on the received image signal; a storage configured to store a plurality of calibration coefficients corresponding to more than two gradations from among the plurality of gradations to calibrate a uniformity of the image; and a controller configured to control the display to apply to the received image signal, a calibration coefficient corresponding to a gradation of the received image signal from among the plurality of gradations to display the image. With this, the uniformity of the image outputted from the display apparatus is exactly calibrated with respect to the plurality of gradations.Type: GrantFiled: August 18, 2016Date of Patent: July 7, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-hoon Cho, Ji-yong Park, Sang-kyun Im
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Publication number: 20200193897Abstract: Provided a display apparatus including a display including a plurality of display modules, each display module of the plurality of display modules including a pixel driving circuit and at least one pixel including a red inorganic light emitting element, a green inorganic light emitting element, and a blue inorganic light emitting element, a signal receiver configured to receive an image signal having a plurality of grayscales, and a controller configured to divide the display into a plurality of regions, each region of the plurality of regions having a same area and including at least one display module among the plurality of display modules, calibrate the image signal to output uniform light from each of the plurality of regions, and control the pixel driving circuit to display an image based on the calibrated image signal.Type: ApplicationFiled: December 16, 2019Publication date: June 18, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji Yong PARK, Young-Hoon CHO, Sang Kyun IM
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Patent number: 10665152Abstract: A method of operating a light emitting diode (LED) display device is provided. The method includes determining idle time periods respectively corresponding to LED driving clock signals, based on a number of LED driving clock signals corresponding to one frame, controlling generation of the LED driving clock signals, based on the determined idle time periods, and driving an LED module in a unit of an LED line, based on the generated LED driving clock signals. As the LED display device automatically adjusts idle time periods of the LED driving clock signals, the occurrence of flicker in the LED display device may be reduced.Type: GrantFiled: September 6, 2017Date of Patent: May 26, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-hoon Cho, Ji-yong Park, Sang-kyun Im
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Publication number: 20200159484Abstract: A display device includes a signal receiver configured to receive an image signal; a display including a plurality of modules each including a plurality of light sources, and display an image based on the received image signal; and a controller configured to perform first uniformity calibration between light sources within each individual module with regard to the modules, and second uniformity calibration between the modules, wherein the controller controls the first uniformity calibration to be applied to the image signal received in the signal receiver based on a first coefficient determined for each of the light sources within each individual module, controls the second uniformity calibration to be applied to the image signal subjected to the first uniformity calibration based on a second coefficient determined for each of the modules, and controls a calibrated image to be displayed based on the image signal subjected to the second uniformity calibration.Type: ApplicationFiled: January 21, 2020Publication date: May 21, 2020Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong PARK, Min-jung KIM, Sang-kyun IM, Young-hoon CHO
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Patent number: 10572210Abstract: A display apparatus includes a cabinet; a display panel provided on the cabinet; a door provided on the cabinet and configured to be opened and closed; a first detector configured to detect opening of the door and output a first signal in response to the door being opened; an image data receiver configured to receive content data from an image source device; and a first controller configured to control the display panel to display a first image corresponding to the content data received from the image source device and control the display panel to display a second image different from the first image in response to receiving the first signal.Type: GrantFiled: September 24, 2018Date of Patent: February 25, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji Yong Park, Hye Rin Choi, Sang Kyun Im, Young-Hoon Cho
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Patent number: 10572208Abstract: A display device includes a signal receiver configured to receive an image signal; a display including a plurality of modules each including a plurality of light sources, and display an image based on the received image signal; and a controller configured to perform first uniformity calibration between light sources within each individual module with regard to the modules, and second uniformity calibration between the modules, wherein the controller controls the first uniformity calibration to be applied to the image signal received in the signal receiver based on a first coefficient determined for each of the light sources within each individual module, controls the second uniformity calibration to be applied to the image signal subjected to the first uniformity calibration based on a second coefficient determined for each of the modules, and controls a calibrated image to be displayed based on the image signal subjected to the second uniformity calibration.Type: GrantFiled: June 9, 2016Date of Patent: February 25, 2020Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong Park, Min-jung Kim, Sang-kyun Im, Young-hoon Cho
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Patent number: 10475368Abstract: A display device is provided, which includes a display, a ditherer configured to perform dithering of video data displayed on the display, an illumination sensor configured to sense illumination around the display device, and a processor configured to control driving of the ditherer on the basis of a grayscale level of the video data if or when the sensed illumination is lower than a predetermined value.Type: GrantFiled: October 21, 2016Date of Patent: November 12, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong Park, Young-hoon Cho, Sang-kyun Im
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Patent number: 10445050Abstract: An operating method of an image display apparatus includes detecting a screen aspect ratio of an input image; determining rotation control information regarding a tiled display of the image display apparatus, the tiled display including a plurality of individually rotatable display modules, according to the detected screen aspect ratio of the input image; rotating each of the plurality of display modules according to the determined rotation control information; and controlling the plurality of display modules to display the input image according to the determined rotation control information.Type: GrantFiled: August 29, 2017Date of Patent: October 15, 2019Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong Park, Sang-kyun Im, Young-hoon Cho
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Publication number: 20190095167Abstract: A display apparatus includes a cabinet; a display panel provided on the cabinet; a door provided on the cabinet and configured to be opened and closed; a first detector configured to detect opening of the door and output a first signal in response to the door being opened; an image data receiver configured to receive content data from an image source device; and a first controller configured to control the display panel to display a first image corresponding to the content data received from the image source device and control the display panel to display a second image different from the first image in response to receiving the first signal.Type: ApplicationFiled: September 24, 2018Publication date: March 28, 2019Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji Yong PARK, Hye Rin CHOI, Sang Kyun IM, Young-Hoon CHO
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Patent number: 10232349Abstract: This invention relates to a catalyst for preparing a cyclic hydrocarbon, which is a non-noble-metal supported on zirconium phosphate, and to a method of preparing a cyclic hydrocarbon, including preparing a cyclic hydrocarbon from a lignin derivative through hydrodeoxygenation and hydrogenation using the catalyst for preparing a cyclic hydrocarbon.Type: GrantFiled: January 22, 2018Date of Patent: March 19, 2019Assignee: Korea University Research and Business FoundationInventors: Kwan Young Lee, Geun Ho Han, Young-Hoon Cho, Min Sung Kim, Myung-gi Seo
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Publication number: 20180295312Abstract: A display apparatus includes a signal receiver configured to receive an image signal having a plurality of gradations; a display configured to display an image based on the received image signal; a storage configured to store a plurality of calibration coefficients corresponding to more than two gradations from among the plurality of gradations to calibrate a uniformity of the image; and a controller configured to control the display to apply to the received image signal, a calibration coefficient corresponding to a gradation of the received image signal from among the plurality of gradations to display the image. With this, the uniformity of the image outputted from the display apparatus is exactly calibrated with respect to the plurality of gradations.Type: ApplicationFiled: August 18, 2016Publication date: October 11, 2018Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-hoon CHO, Ji-yong PARK, Sang-kyun IM
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Publication number: 20180225075Abstract: A display device includes a signal receiver configured to receive an image signal; a display including a plurality of modules each including a plurality of light sources, and display an image based on the received image signal; and a controller configured to perform first uniformity calibration between light sources within each individual module with regard to the modules, and second uniformity calibration between the modules, wherein the controller controls the first uniformity calibration to be applied to the image signal received in the signal receiver based on a first coefficient determined for each of the light sources within each individual module, controls the second uniformity calibration to be applied to the image signal subjected to the first uniformity calibration based on a second coefficient determined for each of the modules, and controls a calibrated image to be displayed based on the image signal subjected to the second uniformity calibration.Type: ApplicationFiled: June 9, 2016Publication date: August 9, 2018Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong PARK, Min-jung KIM, Sang-kyun IM, Young-hoon CHO
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Publication number: 20180141026Abstract: This invention relates to a catalyst for preparing a cyclic hydrocarbon, which is a non-noble-metal supported on zirconium phosphate, and to a method of preparing a cyclic hydrocarbon, including preparing a cyclic hydrocarbon from a lignin derivative through hydrodeoxygenation and hydrogenation using the catalyst for preparing a cyclic hydrocarbon.Type: ApplicationFiled: January 22, 2018Publication date: May 24, 2018Inventors: Kwan Young Lee, Geun Ho Han, Young-Hoon Cho, Min Sung Kim, Myung-gi Seo
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Publication number: 20180130404Abstract: Provided are a light-emitting diode (LED) display device and a method of operating the LED display device determining whether a line flicker will occur based on a level of an input image signal, obtaining an LED line scan order corresponding to the level of the input image signal and brightness according to the input image signal based on the determining, and driving at least one LED line based on the LED line scan order. An LED line scan order may be adjusted according to a level of an input/output image signal in an LED display device so as to reduce occurrence of a line flicker phenomenon in all levels of the input/output image signal.Type: ApplicationFiled: November 3, 2017Publication date: May 10, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Ji-yong PARK, Sang-kyun IM, Young-hoon CHO, Hye-rin CHOI
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Publication number: 20180068610Abstract: A method of operating a light emitting diode (LED) display device is provided. The method includes determining idle time periods respectively corresponding to LED driving clock signals, based on a number of LED driving clock signals corresponding to one frame, controlling generation of the LED driving clock signals, based on the determined idle time periods, and driving an LED module in a unit of an LED line, based on the generated LED driving clock signals. As the LED display device automatically adjusts idle time periods of the LED driving clock signals, the occurrence of flicker in the LED display device may be reduced.Type: ApplicationFiled: September 6, 2017Publication date: March 8, 2018Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-hoon CHO, Ji-yong PARK, Sang-kyun IM
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Publication number: 20180060015Abstract: An operating method of an image display apparatus includes detecting a screen aspect ratio of an input image; determining rotation control information regarding a tiled display of the image display apparatus, the tiled display including a plurality of individually rotatable display modules, according to the detected screen aspect ratio of the input image; rotating each of the plurality of display modules according to the determined rotation control information; and controlling the plurality of display modules to display the input image according to the determined rotation control information.Type: ApplicationFiled: August 29, 2017Publication date: March 1, 2018Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-yong PARK, Sang-kyun IM, Young-hoon CHO
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Publication number: 20180056277Abstract: Disclosed is a core-shell structured nanocatalyst for hydrogen peroxide production. The core-shell structured nanocatalyst includes a core composed of spherical silica immobilized with noble metal nanoparticles and a mesoporous shell surrounding the core. The use of the nanocatalyst with a mesoporous shell for the production of hydrogen peroxide from hydrogen and oxygen ensures high hydrogen conversion and hydrogen peroxide production rate compared to the use of conventional nanoparticle catalysts with a microporous shell. Also disclosed is a method for hydrogen peroxide production using the nanocatalyst.Type: ApplicationFiled: November 30, 2016Publication date: March 1, 2018Applicants: Korea University Research and Business Foundation, Korea Institute of Science and TechnologyInventors: Kwan-Young Lee, Myung-gi Seo, Sang Soo Han, Ho Joong Kim, Deok-Yeon Jo, Young-Hoon Cho
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Patent number: 9837919Abstract: Some embodiments include an electric power conversion apparatus, which may include a transformer, a first converter connected to a primary side of the transformer, a second converter connected to a secondary side of the transformer, a first capacitor connected to the first converter, a second capacitor connected to the second converter, and a control unit for controlling the first converter and the second converter, wherein the control unit may determine operation ranges with respect to a plurality of modulation methods, may determine a modulation method including an output electric power value of the electric power conversion apparatus among the operation ranges of the plurality of modulation methods, and may output control signals of the first converter and the second converter based on the determined modulation method, wherein the control signals correspond to an instruction value.Type: GrantFiled: May 26, 2016Date of Patent: December 5, 2017Assignee: LSIS CO., LTD.Inventors: Anno Yoo, Young-Hoon Cho, Byeng-Joo Byen
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Publication number: 20170154557Abstract: An image display apparatus, a driving method thereof, a computer-readable recording medium and controller are provided. The method includes receiving video data, determining valid data used to determine pixel failure of a display panel by determining a pixel value of each sub pixel in the received video data, generating detection data based on an applied pixel value of the sub pixel in response to the video data being applied to the display panel, and determining the pixel failure by determining a state of the generated detection data corresponding to the determined valid data.Type: ApplicationFiled: November 15, 2016Publication date: June 1, 2017Applicant: Samsung Electronics Co., Ltd.Inventors: Chang-ho SHON, Ki-ock SHIN, Ji-yong PARK, Sang-kyun IM, Young-hoon CHO