Patents by Inventor Sang Hoon Cheon
Sang Hoon Cheon 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: 20240119111Abstract: The present invention relates to a method and apparatus for performing two dimension fast fourier transform for hologram processing. A method for processing a hologram according to an embodiment of the present disclosure may comprise: generating complex data by multiplying the digital image by a random phase value; performing inverse fast fourier transform (IFFT) processing on the complex data; generating pattern information by multiplying a result of the IFFT processing by a quadrant phase; and processing the hologram based on the pattern information. Here, the IFFT processing may comprise a IFFT core operation that performs row-base IFFT and column-base IFFT on the complex data, and a single shift IFFT operation that applies a predefined rule to a result of one or more of the row-based IFFT or the column-based IFFT.Type: ApplicationFiled: October 4, 2023Publication date: April 11, 2024Applicant: Electronics and Telecommunications Research InstituteInventors: Won Ok KWON, Sang Hoon CHEON
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Patent number: 11932545Abstract: The present disclosure relates to a method for preparing a mordenite zeolite, the method including crystallizing, at a temperature of 150° C. to 190° C., a gel which includes, in mol based on 1 mol of silica, 0.02 to 0.2 of an alumina precursor, 0.01 to 0.04 of a structure-directing agent, 0.1 to 0.18 of a pH control agent, and 10 to 100 of water. According to the present disclosure, a mordenite zeolite having high particle size uniformity and a particle size controllable while maintaining the particle size uniformity may be prepared.Type: GrantFiled: September 23, 2019Date of Patent: March 19, 2024Assignee: SK Innovation Co., Ltd.Inventors: Young-Eun Cheon, Yeon-Ho Kim, Sang-Il Lee, Ji-Hoon Lee
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Patent number: 11873232Abstract: Provided is a method for producing hexagonal tungsten oxide, the method including preparing an alkaline solvent having a pH of 8 to 9, which contains at least one of water or alcohol, adding tungsten chloride to the alkaline solvent to form a first reaction solution, adding an additive to the first reaction solution to form a second reaction solution, and adding strong acid to the second reaction solution to form nanoparticles. The additive includes any one of an amine compound having 1 to 8 carbon atoms or an aliphatic hydrocarbon derivative having 10 or more carbon atoms.Type: GrantFiled: September 16, 2021Date of Patent: January 16, 2024Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hojun Ryu, Doo-Hee Cho, Juhee Song, Chil Seong Ah, Sang Hoon Cheon
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Patent number: 11789576Abstract: Provided is a flexible touch panel.Type: GrantFiled: September 6, 2022Date of Patent: October 17, 2023Assignee: Electronics and Telecommunications Research InstituteInventors: Chan Woo Park, Sang Hoon Cheon, Tae-Youb Kim, Bock Soon Na, Ji-Young Oh, Su Jae Lee
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Publication number: 20230296954Abstract: Provided is a method for manufacturing an electrochromic device, the method including forming a first electrode on a first flexible substrate, forming an electrochromic layer on the first electrode, etching the electrochromic layer to form electrochromic pixel patterns, etching the first electrode to form fine pattern electrodes including first fine pattern electrode portions and second fine pattern electrode portions, forming an insulation film on upper surfaces of the second fine pattern electrode portions, and forming an electrolyte layer on the insulation film and on the electrochromic pixel patterns, wherein the electrochromic pixel patterns are disposed on upper surface of the first fine pattern electrode portions, and the etching of the first electrode and the etching of the electrochromic layer are performed in a single process.Type: ApplicationFiled: December 8, 2022Publication date: September 21, 2023Inventors: Chil Seong AH, Hojun RYU, Juhee SONG, Sang Hoon CHEON
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Patent number: 11726330Abstract: Provided are a display device and an augmented reality apparatus including the same. The display device includes a display panel including display blocks and an optics array including pin hole structures that one-to-one correspond to the display blocks. Here, each of the pin hole structures includes a pin hole and a shielding area surrounding the pin hole, and the display blocks are spaced apart from each other in a first direction parallel to a top surface of the display panel and a second direction crossing the first direction and parallel to the top surface of the display panel.Type: GrantFiled: January 21, 2021Date of Patent: August 15, 2023Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seong-Mok Cho, Yong Hae Kim, Hyunkoo Lee, Sang Hoon Cheon, Kyunghee Choi, Chi-Sun Hwang
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Publication number: 20230152930Abstract: Provided is a flexible touch panel.Type: ApplicationFiled: September 6, 2022Publication date: May 18, 2023Applicant: Electronics and Telecommunications Research InstituteInventors: Chan Woo PARK, Sang Hoon CHEON, Tae-Youb KIM, Bock Soon NA, Ji-Young OH, Su Jae LEE
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Patent number: 11550198Abstract: Provided is an electrochromic display device including: a first substrate; a second substrate on the first substrate; an electrolyte layer disposed between the first substrate and the second substrate; a first transparent electrode provided between the electrolyte layer and the first substrate; second transparent electrodes provided between the electrolyte layer and the second substrate; a first electrochromic layer provided between the first transparent electrode and the electrolyte layer; and a second electrochromic layer provided between the second transparent electrodes and the electrolyte layer, wherein the second transparent electrodes each extend in a first direction and be disposed apart from each other in a second direction perpendicular to the first direction, the second electrochromic layer extends between the second transparent electrodes and contacts a lower surface of the second substrate, the first electrochromic layer includes an inorganic electrochromic material, and the second electrochromicType: GrantFiled: November 4, 2021Date of Patent: January 10, 2023Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chil Seong Ah, Juhee Song, Hojun Ryu, Tae-Youb Kim, Sang Hoon Cheon, Doo-Hee Cho, Seong-Mok Cho, Chi-Sun Hwang
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Patent number: 11392086Abstract: A hologram display device includes a light source unit that emits light, a spatial light modulator that modulates the light emitted from the light source unit, and a random pinhole panel. The random pinhole panel includes a plurality of pinholes of a random position or a random size and is arranged in line with an output part of the spatial light modulator. In the hologram display device and the method of manufacturing the hologram display device, a position and size of a random pinhole on the random pinhole are not limited to inside each pixel of the spatial light modulator.Type: GrantFiled: August 7, 2020Date of Patent: July 19, 2022Assignee: Electronics and Telecommunications Research InstituteInventors: Yong Hae Kim, Seong-Mok Cho, Chi-Sun Hwang, Ji Hun Choi, Gi Heon Kim, Jong-Heon Yang, Sang Hoon Cheon, Kyunghee Choi, Jae-Eun Pi
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Publication number: 20220214589Abstract: Provided is a method of manufacturing a thin film electrode for an electrochromic device, and an electrochromic device manufactured thereby. Specifically, a method of manufacturing a thin film electrode for an electrochromic device includes: synthesizing insoluble Prussian blue nanoparticles; adding a surfactant to the insoluble Prussian blue nanoparticles to form water-soluble Prussian blue nanoparticles; adding a solvent and a binder to the water-soluble Prussian blue nanoparticles to form a mixed solution; applying the mixed solution onto an electrode; and performing a drying process on the electrode applied with the mixed solution, wherein the drying process may be performed at 15° C. to 30° C.Type: ApplicationFiled: November 4, 2021Publication date: July 7, 2022Inventors: Tae-Youb KIM, Jisu HAN, Hojun RYU, Juhee SONG, Chil Seong AH, Sang Hoon CHEON
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Publication number: 20220179272Abstract: Provided is an electrochromic display device including: a first substrate; a second substrate on the first substrate; an electrolyte layer disposed between the first substrate and the second substrate; a first transparent electrode provided between the electrolyte layer and the first substrate; second transparent electrodes provided between the electrolyte layer and the second substrate; a first electrochromic layer provided between the first transparent electrode and the electrolyte layer; and a second electrochromic layer provided between the second transparent electrodes and the electrolyte layer, wherein the second transparent electrodes each extend in a first direction and be disposed apart from each other in a second direction perpendicular to the first direction, the second electrochromic layer extends between the second transparent electrodes and contacts a lower surface of the second substrate, the first electrochromic layer includes an inorganic electrochromic material, and the second electrochromicType: ApplicationFiled: November 4, 2021Publication date: June 9, 2022Inventors: Chil Seong AH, Juhee SONG, Hojun RYU, Tae-Youb KIM, Sang Hoon CHEON, Doo-Hee CHO, Seong-Mok CHO, Chi-Sun HWANG
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Publication number: 20220169531Abstract: Provided is a method for producing hexagonal tungsten oxide, the method including preparing an alkaline solvent having a pH of 8 to 9, which contains at least one of water or alcohol, adding tungsten chloride to the alkaline solvent to form a first reaction solution, adding an additive to the first reaction solution to form a second reaction solution, and adding strong acid to the second reaction solution to form nanoparticles. The additive includes any one of an amine compound having 1 to 8 carbon atoms or an aliphatic hydrocarbon derivative having 10 or more carbon atoms.Type: ApplicationFiled: September 16, 2021Publication date: June 2, 2022Inventors: Hojun RYU, Doo-Hee CHO, Juhee SONG, Chil Seong AH, Sang Hoon CHEON
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Publication number: 20220137556Abstract: Provided is an operation method for a digital hologram implementation device including a backlight and a spatial light modulator, the operation method including setting an initial phase value of an optical signal to a remedy phase, computing a reduced phase based on the remedy phase, correcting the remedy phase based on a difference between the reduced phase and a preset optimized phase, determining whether the corrected remedy phase is a stabilized phase, performing forward propagation on the stabilized phase and an amplitude of the optical signal, correcting the amplitude of the optical signal, performing backward propagation on the corrected amplitude and the stabilized phase, and determining whether a phase derived by the backward propagation is an optimized phase.Type: ApplicationFiled: September 30, 2021Publication date: May 5, 2022Inventors: Yong Hae KIM, Gi Heon KIM, Joo Yeon KIM, Jong-Heon YANG, Sang Hoon CHEON, Seong-Mok CHO, Kyunghee CHOI, Ji Hun CHOI, Jae-Eun PI, Chi-Sun HWANG
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Publication number: 20210325826Abstract: Disclosed is an apparatus for displaying a hologram including a pixel circuit array including first to nth pixel circuits, a first insulating layer provided on the pixel circuit array, first to nth pixel electrodes provided on the first insulating layer and electrically connected to the first to nth pixel circuits, respectively, a second insulating layer provided on the first insulating layer, first to nth display electrodes provided on the second insulating layer and electrically connected to the first to nth pixel electrodes, respectively, a display panel formed on the first to nth display electrodes, and a common electrode formed on the display panel. The first to nth display electrodes are clustery formed, and an area of the first to nth display electrodes is smaller than an area of the pixel circuit array.Type: ApplicationFiled: April 16, 2021Publication date: October 21, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Sang Hoon CHEON, Yong Hae KIM, Seong-Mok CHO, Kyunghee CHOI, Chi-Sun HWANG
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Publication number: 20210231956Abstract: Provided are a display device and an augmented reality apparatus including the same. The display device includes a display panel including display blocks and an optics array including pin hole structures that one-to-one correspond to the display blocks. Here, each of the pin hole structures includes a pin hole and a shielding area surrounding the pin hole, and the display blocks are spaced apart from each other in a first direction parallel to a top surface of the display panel and a second direction crossing the first direction and parallel to the top surface of the display panel.Type: ApplicationFiled: January 21, 2021Publication date: July 29, 2021Applicant: Electronics and Telecommunications Research InstituteInventors: Seong-Mok CHO, Yong Hae KIM, Hyunkoo LEE, Sang Hoon CHEON, Kyunghee CHOI, Chi-Sun HWANG
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Publication number: 20210141339Abstract: Provided is a hologram generation method including receiving a distribution of a polygon and generating an angular spectrum based on the distribution of the polygon, determining whether a rotation angle of the polygon is included in a first section determined based on a maximum diffraction angle of a spatial light modulator, and recording the angular spectrum if it is determined that the rotation angle is included in the first section.Type: ApplicationFiled: November 5, 2020Publication date: May 13, 2021Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang Hoon CHEON, HANJU YEOM, Joong-Ki PARK, Kwan-Jung OH, Keehoon HONG
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Publication number: 20210124305Abstract: Provided are a hologram display device and a method of manufacturing the hologram display device. The hologram display device includes a light source unit that emits light, a spatial light modulator that modulates the light emitted from the light source unit, and a random pinhole panel. The random pinhole panel includes a plurality of pinholes of a random position or a random size and is arranged in line with an output part of the spatial light modulator. In the hologram display device and the method of manufacturing the hologram display device, a position and size of a random pinhole on the random pinhole are not limited to inside each pixel of the spatial light modulator.Type: ApplicationFiled: August 7, 2020Publication date: April 29, 2021Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Yong Hae KIM, Seong-Mok CHO, Chi-Sun HWANG, Ji Hun CHOI, Gi Heon KIM, Jong-Heon YANG, Sang Hoon CHEON, Kyunghee CHOI, Jae-Eun PI
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Patent number: 10914555Abstract: Provided is an active camouflage device including a reflective layer, a first electrode disposed on the reflective layer, a second electrode facing the first electrode, and an electrolyte provided between the first and second electrodes. The first electrode includes a transparent electrode, and the second electrode includes a metal mesh.Type: GrantFiled: April 10, 2018Date of Patent: February 9, 2021Assignee: Electronics and Telecommunications Research InstituteInventors: Tae-Youb Kim, Juhee Song, Chil Seong Ah, Seong-Mok Cho, Sujung Kim, Joo Yeon Kim, Hojun Ryu, Jeong Ik Lee, Sang Hoon Cheon, Chi-Sun Hwang
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Publication number: 20210034013Abstract: A spatial light modulator according to the inventive concept includes a light modulation layer including a plurality of pixels arranged on a plane perpendicular to a first direction, a first lens array including first lenses corresponding one-to-one with the pixels, a second lens array including second lenses corresponding one-to-one with the first lenses, and a spacer layer between the first lens array and the second lens array. Each of the first lenses has a first central axis extending in the first direction and the first central axes of the first lenses meet at different positions for each of the pixels.Type: ApplicationFiled: April 13, 2020Publication date: February 4, 2021Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seong-Mok CHO, Yong Hae KIM, Sang Hoon CHEON, Kyunghee CHOI, Chi-Sun HWANG
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Patent number: 10481461Abstract: Provided is a reversible electrochemical mirror including a first substrate and a second substrate, which face each other, a first transparent electrode disposed on the first substrate and facing the second substrate, a second transparent electrode disposed on the second substrate and facing the first transparent electrode, an electrolyte solution interposed between the first transparent electrode and the second transparent electrode, and a counter electrode material layer disposed on the second transparent electrode and contacting the electrolyte solution.Type: GrantFiled: April 4, 2018Date of Patent: November 19, 2019Assignee: Electronics and Telecommunications Research InstituteInventors: Seong-Mok Cho, Sujung Kim, Tae-Youb Kim, Juhee Song, Chil Seong Ah, Yong Hae Kim, Joo Yeon Kim, Hojun Ryu, Jeong Ik Lee, Sang Hoon Cheon, Chi-Sun Hwang