Patents by Inventor Gun Uk Kim
Gun Uk Kim 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: 20230407022Abstract: The embodiments relate to a polyester film, and a laminate and a foldable display device comprising the same. As the polyester film has a yield elongation in a specific range, it can be excellent in folding characteristics, along with high surface hardness.Type: ApplicationFiled: May 15, 2023Publication date: December 21, 2023Inventors: Gun Uk KIM, Sang Min CHOI, Jin-Seok PARK
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Patent number: 11820893Abstract: Embodiments relate to a polymer film that is excellent in folding characteristics and transparency and maintains excellent mechanical properties even after repeated elongation and shrinkage in the elastic region, a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has an MOR0/9 of Equation A of 2% or less.Type: GrantFiled: June 26, 2020Date of Patent: November 21, 2023Assignee: SK Microworks Co., LTD.Inventors: Jung Hee Ki, Sunhwan Kim, Han Jun Kim, Dae Seong Oh, Jin Woo Lee, Sang Hun Choi, Gun Uk Kim
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Patent number: 11745470Abstract: The polyester film according to the embodiment can maintain its original characteristics even after a plurality of repeated folding by adjusting the deformed dimension as compared with the initial dimension of the film, in particular, by adjusting the ratio between the deformed dimensions in two in-plane directions perpendicular to each other to a specific range, in the cycle of straining and relaxing the film. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: GrantFiled: April 30, 2020Date of Patent: September 5, 2023Assignee: SK microworks Co., Ltd.Inventors: Gun Uk Kim, Young Min Heo, Sechul Lee, Sang Min Choi
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Patent number: 11642825Abstract: A polyester-based film having excellent scratch resistance, durability, transparency, and visibility and a process for preparing the same. The polyester-based film comprises a base layer and a coating layer on at least one side of the base layer. The light passage according to Relationship 1 is 91% or more, or the total transmittance for light of 380 nm to 780 nm is 92% or more, it has excellent optical properties, durability, visibility, and reliability. Thus, it can be applied to display devices such as smartphones, tablet PCs, and laptops. In addition, in the polyester-based film according to an embodiment, the strain with respect to tensile load satisfies a specific range, whereby it is possible to achieve the flexibility that hardly causes deformation even when a certain load is maintained for a long period of time. Thus, it can be applied to flexible display devices, particularly, foldable display devices.Type: GrantFiled: December 7, 2021Date of Patent: May 9, 2023Assignee: SKC CO., LTD.Inventors: A Rim Yu, Gun Uk Kim, Sechul Lee, Sun Ki Lee, Sang Min Choi, Jin-Seok Park, Jung Won Yu
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Publication number: 20230137902Abstract: In the polyester film according to an embodiment, the transmittance for a specific wavelength and the strain for a tensile load to certain ranges when exposed to UV light, whereby it is possible to enhance the UV durability and flexibility at the same time. Accordingly, the polyester film and the laminated sheet comprising the same can be applied to a cover of a flexible display device, in particular, a foldable display device to prevent the poor or deformed appearance or the occurrence of device defects during repeated folding and exposure to UV light for long-term use.Type: ApplicationFiled: October 29, 2021Publication date: May 4, 2023Inventors: Gun Uk KIM, Jin-Seok PARK, Sang Min CHOI
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Patent number: 11630239Abstract: The polyester film according to an embodiment has a coefficient of determination (R2) of the strain with respect to stress and a crystallinity adjusted to specific ranges, whereby it is possible to achieve the flexibility that does not cause deformation even when a certain stress is sustained for a long period of time and the resistant characteristics to the impact of external pressing. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: GrantFiled: October 15, 2020Date of Patent: April 18, 2023Assignee: SKC CO., LTD.Inventors: Gun Uk Kim, Sang Min Choi, Young Min Heo
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Patent number: 11548207Abstract: The polyester film according to the embodiment achieves the elasticity required for a cover of a flexible display by increasing the rate of increase in stress in an initial stage of strain to a certain level or higher. As a result, it is possible to maintain the original characteristics when it is applied to a cover of a flexible display device and subjected to a plurality of repeated folding. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: GrantFiled: April 30, 2020Date of Patent: January 10, 2023Assignee: SKC CO., LTD.Inventors: Gun Uk Kim, Young Min Heo, Sechul Lee, Jin-Seok Park, Sang Min Choi
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Patent number: 11551584Abstract: In the polyester film according to an embodiment, the strain with respect to tensile load and the crystallinity are adjusted to specific ranges, whereby it is possible to achieve the flexibility that does not cause deformation even when a certain load is sustained for a long period of time and the resistant characteristics to the impact of external pressing. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: GrantFiled: October 15, 2020Date of Patent: January 10, 2023Assignee: SKC CO., LTD.Inventors: Gun Uk Kim, Young Min Heo, Sang Min Choi
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Publication number: 20220276411Abstract: A protection film according to an embodiment implements a very low reflectivity through a multilayer structure of which the refractive index is controlled and does not cause whitening and cracking to occur even in the case of frequent bending or folding thereof. Accordingly, the protection film is applied to a flexible display device, and especially to a cover of a foldable display device, thereby showing excellent optical and mechanical characteristics.Type: ApplicationFiled: September 4, 2020Publication date: September 1, 2022Inventors: Young Min HEO, Gun Uk KIM, Sechul LEE, Jin-Seok Park
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Publication number: 20220176605Abstract: A polyester-based film having excellent scratch resistance, durability, transparency, and visibility and a process for preparing the same. The polyester-based film comprises a base layer and a coating layer on at least one side of the base layer. The light passage according to Relationship 1 is 91% or more, or the total transmittance for light of 380 nm to 780 nm is 92% or more, it has excellent optical properties, durability, visibility, and reliability. Thus, it can be applied to display devices such as smartphones, tablet PCs, and laptops. In addition, in the polyester-based film according to an embodiment, the strain with respect to tensile load satisfies a specific range, whereby it is possible to achieve the flexibility that hardly causes deformation even when a certain load is maintained for a long period of time. Thus, it can be applied to flexible display devices, particularly, foldable display devices.Type: ApplicationFiled: December 7, 2021Publication date: June 9, 2022Inventors: A Rim YU, Gun Uk KIM, Sechul LEE, Sun Ki LEE, Sang Min CHOI, Jin-Seok PARK, Jung Won YU
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Publication number: 20210124090Abstract: The polyester film according to an embodiment has a coefficient of determination (R2) of the strain with respect to stress and a crystallinity adjusted to specific ranges, whereby it is possible to achieve the flexibility that does not cause deformation even when a certain stress is sustained for a long period of time and the resistant characteristics to the impact of external pressing. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: ApplicationFiled: October 15, 2020Publication date: April 29, 2021Inventors: Gun Uk KIM, Sang Min CHOI, Young Min HEO
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Publication number: 20210125528Abstract: In the polyester film according to an embodiment, the strain with respect to tensile load and the crystallinity are adjusted to specific ranges, whereby it is possible to achieve the flexibility that does not cause deformation even when a certain load is sustained for a long period of time and the resistant characteristics to the impact of external pressing. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: ApplicationFiled: October 15, 2020Publication date: April 29, 2021Inventors: Gun Uk KIM, Young Min HEO, Sang Min CHOI
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Publication number: 20200407556Abstract: Embodiments relate to a polymer film that is excellent in folding characteristics and transparency and maintains excellent mechanical properties even after repeated elongation and shrinkage in the elastic region, a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has an MOR0/9 of Equation A of 2% or less.Type: ApplicationFiled: June 26, 2020Publication date: December 31, 2020Inventors: Jung Hee KI, Sunhwan KIM, Han Jun KIM, Dae Seong OH, Jin Woo LEE, Sang Hun CHOI, Gun Uk KIM
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Publication number: 20200353733Abstract: The polyester film according to the embodiment achieves the elasticity required for a cover of a flexible display by increasing the rate of increase in stress in an initial stage of strain to a certain level or higher. As a result, it is possible to maintain the original characteristics when it is applied to a cover of a flexible display device and subjected to a plurality of repeated folding. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: ApplicationFiled: April 30, 2020Publication date: November 12, 2020Inventors: Gun Uk KIM, Young Min HEO, Sechul LEE, Jin-Seok PARK, Sang Min CHOI
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Publication number: 20200353734Abstract: The polyester film according to the embodiment can maintain its original characteristics even after a plurality of repeated folding by adjusting the deformed dimension as compared with the initial dimension of the film, in particular, by adjusting the ratio between the deformed dimensions in two in-plane directions perpendicular to each other to a specific range, in the cycle of straining and relaxing the film. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.Type: ApplicationFiled: April 30, 2020Publication date: November 12, 2020Inventors: Gun Uk KIM, Young Min HEO, Sechul LEE, Sang Min CHOI
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Publication number: 20180286997Abstract: Embodiments relate to an encapsulant for solar cells and a solar cell module comprising the same. The encapsulant for solar cells is excellent in moisture resistance and durability since it adsorbs acetic acid that is generated from an ethylene-vinyl acetate copolymer. Therefore, the solar cell module comprising the encapsulant for solar cells can minimize a reduction in the power output even when it is exposed to the exterior for a long period of time.Type: ApplicationFiled: March 27, 2018Publication date: October 4, 2018Applicant: SKC CO., LTD.Inventors: Gun Uk KIM, Kweon Hyung HAN
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Patent number: 8263854Abstract: An encapsulant sheet for solar cell modules comprising a transparent soft resin film having a plurality of hemispherical concave parts of varying sizes formed on one or both surfaces of the transparent soft resin film, can disperse pressure generated in the process of combining the encapsulant sheet and a solar battery cell to prevent damage to the solar battery cell and suppress bubble generation by allowing air to escape easily.Type: GrantFiled: December 1, 2009Date of Patent: September 11, 2012Assignee: SKC Co., LtdInventors: Ki Nam Byun, Yong Lae Yi, Kyoung-Soo Song, Gun Uk Kim
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Publication number: 20110203642Abstract: An encapsulant sheet for solar cell modules comprising a transparent soft resin film having a plurality of hemispherical concave parts of varying sizes formed on one or both surfaces of the transparent soft resin film, can disperse pressure generated in the process of combining the encapsulant sheet and a solar battery cell to prevent damage to the solar battery cell and suppress bubble generation by allowing air to escape easily.Type: ApplicationFiled: December 1, 2009Publication date: August 25, 2011Applicant: SKC CO., LTD.Inventors: Ki Nam Byun, Yong Lae Yi, Kyoung-Soo Song, Gun Uk Kim