Patents by Inventor Jae-shik Choi
Jae-shik Choi 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: 11961177Abstract: A method of controlling a display device includes rendering a plurality of viewpoint images, generating a plurality of sub-images based on the plurality of viewpoint images and a plurality of mapping pattern images corresponding to the plurality of viewpoint images, generating a single light-field image based on the plurality of sub-images, and outputting the single light-field image.Type: GrantFiled: October 4, 2021Date of Patent: April 16, 2024Assignees: SAMSUNG DISPLAY CO., LTD., MAXST CO., LTD.Inventors: Rang Kyun Mok, Ji Young Choi, Gi Seok Kwon, Jae Joong Kwon, Beom Shik Kim, Jae Wan Park
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Patent number: 7732048Abstract: The present invention relates to cellulose fiber containing 500 to 2000 of filaments and having homogeneous physical properties and the multi-filaments according to the present invention is characterized in that the strength and the breaking elongation of the multi-filaments are 4 to 9 g/d and 4 to 15%, respectively. In particular, the present invention is characterized in that each mono-filament selected 100 strands from every three part divided from multi-filaments has properties as following: (a) 3 to 9 g/d in average strength, 7 to 15% in average breaking elongation and 0.035 to 0.055 in by birefringence, (b) the differences of the above three parts are below 1.0 g/d in average strength, 1.5% in breaking elongation and 0.7 denier in denier, (c) the CV (%) (coefficient of variation) of the above three parts are below 10%, and (d) the birefringence differences of the above three parts are below 0.004.Type: GrantFiled: September 23, 2005Date of Patent: June 8, 2010Assignee: Hyosung CorporationInventors: Ik-Hyun Kwon, Soo-Myung Choi, Tae-Jung Lee, Jae-Shik Choi
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Patent number: 7713459Abstract: The present invention relates to cellulose fiber containing 500 to 2000 of filaments and having homogeneous physical properties and the multi-filaments according to the present invention is characterized in that the strength and the breaking elongation of the multi-filaments are 4 to 9 g/d and 4 to 15%, respectively. In particular, the present invention is characterized in that each mono-filament selected 100 strands from every three part divided from multi-filaments has properties as following: (a) 3 to 9 g/d in average strength, 7 to 15% in average breaking elongation and 0.035 to 0.055 in by birefringence, (b) the differences of the above three parts are below 1.0 g/d in average strength, 1.5% in breaking elongation and 0.7 denier in denier, (c) the CV (%) (coefficient of variation) of the above three parts are below 10%, and (d) the birefringence differences of the above three parts are below 0.004.Type: GrantFiled: June 22, 2007Date of Patent: May 11, 2010Assignee: HYOSUNG CorporationInventors: Ik-Hyun Kwon, Soo-Myung Choi, Tae-Jung Lee, Jae-Shik Choi
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Publication number: 20090011234Abstract: The present invention relates to cellulose fiber containing 500 to 2000 of filaments and having homogeneous physical properties and the multi-filaments according to the present invention is characterized in that the strength and the breaking elongation of the multi-filaments are 4 to 9 g/d and 4 to 15%, respectively. In particular, the present invention is characterized in that each mono-filament selected 100 strands from every three part divided from multi-filaments has properties as following: (a) 3 to 9 g/d in average strength, 7 to 15% in average breaking elongation and 0.035 to 0.055 in by birefringence, (b) the differences of the above three parts are below 1.0 g/d in average strength, 1.5% in breaking elongation and 0.7 denier in denier, (c) the CV (%) (coefficient of variation) of the above three parts are below 10%, and (d) the birefringence differences of the above three parts are below 0.004.Type: ApplicationFiled: September 23, 2005Publication date: January 8, 2009Applicant: HYOSUNG CORPORATIONInventors: Ik-Hyun Kwon, Soo-Myung Choi, Tae-Jung Lee, Jae-Shik Choi
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Publication number: 20070241477Abstract: The present invention relates to cellulose fiber containing 500 to 2000 of filaments and having homogeneous physical properties and the multi-filaments according to the present invention is characterized in that the strength and the breaking elongation of the multi-filaments are 4 to 9 g/d and 4 to 15%, respectively. In particular, the present invention is characterized in that each mono-filament selected 100 strands from every three part divided from multi-filaments has properties as following: (a) 3 to 9 g/d in average strength, 7 to 15% in average breaking elongation and 0.035 to 0.055 in by birefringence, (b) the differences of the above three parts are below 1.0 g/d in average strength, 1.5% in breaking elongation and 0.7 denier in denier, (c) the CV (%)(coefficient of variation) of the above three parts are below 10%, and (d) the birefringence differences of the above three parts are below 0.004.Type: ApplicationFiled: June 22, 2007Publication date: October 18, 2007Applicant: HYOSUNG CORPORATIONInventors: Ik-Hyun Kwon, Soo-Myung Choi, Tae-Jung Lee, Jae-Shik Choi
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Patent number: 7214727Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.Type: GrantFiled: October 24, 2003Date of Patent: May 8, 2007Assignee: Hyosung CorporationInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Patent number: 7214335Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.Type: GrantFiled: November 4, 2005Date of Patent: May 8, 2007Assignee: Hyosung CorporationInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Patent number: 7181101Abstract: The disclosure is an optical measuring system and the method thereof for precisely measuring physical characteristics of light emitted from waveguides, such as beam size, pattern, strength, focusing, collimation degree, and divergence angle, by means of a plane optical detector in which a plurality of pixels formed by a semiconductor fabrication process are arranged in an array, without specific measuring means. The light is incident into ends of the arrayed waveguides with uniform time intervals and emitted from the other ends of the waveguides to reach the optical detectors through which the physical characteristics of the light are obtained and defined arithmetically.Type: GrantFiled: July 12, 2002Date of Patent: February 20, 2007Assignees: Hantech Co., Ltd., Institute of Information Technology AssessmentInventors: Gwan Chong Joo, Jae Shik Choi, Ki Woo Chung, Do Hoon Kim
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Patent number: 7097344Abstract: The present invention relates to a method for making highly homogenized cellulose solution, wherein the cellulose solution is obtained by obtaining a solidified N-methylmorphorine-N-oxide (hereinafter, referred to as ‘NMMO’) hydrates which is solidified a liquid-state NMMO hydrates comprising 10 to 18% by weight water by using a simple screw-type feeder and by controlling the temperature, feeding the solidified NMMO into a twin-screw type extruder continuously, obtaining a cellulose solution which is fully swelled in a few minutes by dispersing and mixing with cellulose powder in the twin-screw type extruder, and extruding a highly homogenized cellulose solution by feeding the obtained cellulose solution into a melting zone of the extruder to melting the cellulose solution in a few minutes by minimum heat and shear force.Type: GrantFiled: October 24, 2003Date of Patent: August 29, 2006Assignee: Hyosung CorporationInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Publication number: 20060099416Abstract: The present invention relates to cellulose fiber containing 500 to 2000 of filaments and having homogeneous physical properties and the multi-filaments according to the present invention is characterized in that the strength and the breaking elongation of the multi-filaments are 4 to 9 g/d and 4 to 15%, respectively. In particular, the present invention is characterized in that each mono-filament selected 100 strands from every three part divided from multi-filaments has properties as following: (a) 3 to 9 g/d in average strength, 7 to 15% in average breaking elongation and 0.035 to 0.055 in by birefringence, (b) the differences of the above three parts are below 1.0 g/d in average strength, 1.5% in breaking elongation and 0.7 denier in denier, (c) the CV (%)(coefficient of variation) of the above three parts are below 10%, and (d) the birefringence differences of the above three parts are below 0.004.Type: ApplicationFiled: February 2, 2005Publication date: May 11, 2006Applicant: HYOSUNG CorporationInventors: Ik-Hyun Kwon, Soo-Myung Choi, Tae-Jung Lee, Jae-Shik Choi
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Publication number: 20060076704Abstract: The present invention relates to a method for making highly homogenized cellulose solution, wherein the cellulose solution is obtained by obtaining a solidified N-methylmorphorine-N-oxide (hereinafter, referred to as ‘NMMO’) hydrates which is solidified a liquid-state NMMO hydrates comprising 10 to 18% by weight water by using a simple screw-type feeder and by controlling the temperature, feeding the solidified NMMO into a twin-screw type extruder continuously, obtaining a cellulose solution which is fully swelled in a few minutes by dispersing and mixing with cellulose powder in the twin-screw type extruder, and extruding a highly homogenized cellulose solution by feeding the obtained cellulose solution into a melting zone of the extruder to melting the cellulose solution in a few minutes by minimum heat and shear force.Type: ApplicationFiled: October 18, 2005Publication date: April 13, 2006Applicant: Hyosung CorporationInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Publication number: 20060057378Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.Type: ApplicationFiled: November 4, 2005Publication date: March 16, 2006Applicant: HYOSUNG CORPORATIONInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Patent number: 7010192Abstract: An optical fiber array block includes at least one optical waveguide having an optical fiber zone, and an optical device. An optical signal leakage window is formed at the optical waveguide, and the optical device corresponds to the optical signal leakage window. If the optical signal leakage window is formed at an optical fiber comprising a core and a clad layer, the clad layer is partially removed or is partially connected to the core by means of an ion implantation technique.Type: GrantFiled: November 6, 2002Date of Patent: March 7, 2006Assignee: Hantech Co., Ltd.Inventors: Gwan Chong Joo, Jae Shik Choi, Ki Woo Chung, Do Hoon Kim
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Patent number: 6983779Abstract: The present invention relates to, and more particularily, to a lyocell dip cord and tire produced by a method comprising the steps of: (A) dissolving 0.01 to 3 wt % of cellulose powder in portions in concentrated liquid N-methylmorpholine N-oxide (NMMO) to prepare cellulose-containing NMMO solution; (B) feeding the NMMO solution and cellulose powder into an extruder having a screw to be subjected to dispersing, mixing, shearing, kneading, melting and measuring ability in the extruder to prepare a swollen and homogenized cellulose solution; (C) spinning the cellulose solution through a spinning nozzle, passing the spinning solution through an air gap to a coagulation bath and coagulating the spinning solution to obtain a multifilament; (D) subject the multifilament to water-wash, drying and oil-treatment, followed by winding; and (E) twisting the wound yarn with a twisting machine to prepare a greige cord, weaving the greige cord and dipping the woven cord in a dipping solution.Type: GrantFiled: June 24, 2004Date of Patent: January 10, 2006Assignee: Hyosung CorporationInventors: Ik-Hyun Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han
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Publication number: 20050163507Abstract: The disclosure is an optical measuring system and the method thereof for precisely measuring physical characteristics of light emitted from waveguides, such as beam size, pattern, strength, focusing, collimation degree, and divergence angle, by means of a plane optical detector in which a plurality of pixels formed by a semiconductor fabrication process are arranged in an array, without specific measuring means. The light is incident into ends of the arrayed waveguides with uniform time intervals and emitted from the other ends of the waveguides to reach the optical detectors through which the physical characteristics of the light are obtained and defined arithmetically.Type: ApplicationFiled: July 12, 2002Publication date: July 28, 2005Inventors: Gwan Joo, Jae Shik Choi, Ki Woo Chung, Do Hoon Kim
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Publication number: 20050160939Abstract: The present invention relates to a method for making highly homogenized cellulose solution, wherein the cellulose solution is obtained by obtaining a solidified N-methylmorphorine-N-oxide (hereinafter, referred to as ‘NMMO’) hydrates which is solidified a liquid-state NMMO hydrates comprising 10 to 18% by weight water by using a simple screw-type feeder and by controlling the temperature, feeding the solidified NMMO into a twin-screw type extruder continuously, obtaining a cellulose solution which is fully swelled in a few minutes by dispersing and mixing with cellulose powder in the twin-screw type extruder, and extruding a highly homogenized cellulose solution by feeding the obtained cellulose solution into a melting zone of the extruder to melting the cellulose solution in a few minutes by minimum heat and shear force.Type: ApplicationFiled: October 24, 2003Publication date: July 28, 2005Inventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young -Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Publication number: 20050154093Abstract: This invention relates to a method of preparing cellulose solution which is homogeneous at relatively low temperature, in which a small amount of cellulose powder or polyvinylalcohol is dissolved in the liquid-state, concentrated N-methylmorpholine-N-oxide (hereinafter, referred to as ‘NMMO’) so as to lower the solidifying temperature of NMMO, and then, the resulting solution and cellulose powder are fed into an extruder so as to be mixed, swollen and melted in the extruder.Type: ApplicationFiled: October 24, 2003Publication date: July 14, 2005Inventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han, Myung-Woo Kim
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Patent number: 6902804Abstract: The present invention relates to a high tenacity, high modulus and low shrinkage lyocell multifilament yarn suitable for use in tire cords and MRG (mechanical rubber goods). The lyocell multifilament yarn is a cellulose-based fiber for industrial applications, which is produced by dissolving pulp having a degree of polymerization (DPW) of 700-2,000 and preferably 800-1,400, and a ?-cellulose content of more than 90% and preferably more than 92%, in N-methylmorpholine N-oxide (NMMO) hydrate, at a pulp concentration of 5-15% by weight and preferably 8-13% by weight. The lyocell monofilament according to the present invention is characterized by the following stress-strain profile: (1) the lyocell monofilament analyzed after drying is elongated by less than 3.0% and has an initial modulus of 150-400 g/d, when it was subjected to an initial stress of 3.0 g/d; (2) it is elongated by 3.0-7.0% when it was subjected to a stress greater than the initial stress but smaller than 6.Type: GrantFiled: June 24, 2004Date of Patent: June 7, 2005Assignee: Hyosung CorporationInventors: Ik-Hyeon Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han
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Publication number: 20050079348Abstract: Disclosed is a lyocell multi-filament for a tire cord and a method of producing the same. The method includes i) dissolving mixed powder of cellulose and polyvinyl alcohol in a mixed solvent of N-methyl morpholine N-oxide and water to prepare a dope, ii) extruding the dope using a spinning nozzle including orifices through air gaps into a conical upper coagulation bath to solidify the dope to produce a multi-filament, iii) feeding the multi-filament through a lower coagulation bath to a washing bath, and washing the multi-filament, and iv) drying and oiling the washed multi-filament and winding the resulting multi-filament. At this time, the orifices each have a diameter (D) of 100 to 300 ?m, a length (L) of 200 to 2400 ?m, and a ratio of the length to the diameter (L/D) of 2 to 8, and are spaced apart from each other at intervals of 2.0 to 5.0 mm.Type: ApplicationFiled: October 7, 2004Publication date: April 14, 2005Inventors: Tae-jung Lee, Soo-myung Choi, Young-soo Wang, Seok-jong Han, Cheol Kim, Myung-woo Kim, Ik-hyon Kwon, Sung-ryong Kim, Jae-shik Choi
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Publication number: 20050066646Abstract: The present invention relates to a method for producing tire using high strength lyocell dip cord, and more particularity, to a lyocell dip cord and tire produced by a method comprising the steps of: (A) dissolving 0.Type: ApplicationFiled: June 24, 2004Publication date: March 31, 2005Applicant: HYOSUNG CorporationInventors: Ik-Hyun Kwon, Soo-Myung Choi, Young-Soo Wang, Sung-Ryong Kim, Jae-Shik Choi, Tae-Jung Lee, Seok-Jong Han