Patents by Inventor Sang Min Choi

Sang Min 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).

  • Publication number: 20250068279
    Abstract: The present embodiment relates to a touch sensing apparatus and a touch sensing method and, more specifically, to a touch sensing apparatus and a touch sensing method, which rapidly and accurately separate a multi-touch in which touch areas are adjacent to each other.
    Type: Application
    Filed: November 30, 2022
    Publication date: February 27, 2025
    Applicant: LX SEMICON CO., LTD.
    Inventors: Nu Ri KIM, Gyu Min GIL, Young Eun LEE, Sang Min CHOI
  • Publication number: 20230407022
    Abstract: 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: Application
    Filed: May 15, 2023
    Publication date: December 21, 2023
    Inventors: Gun Uk KIM, Sang Min CHOI, Jin-Seok PARK
  • Patent number: 11745470
    Abstract: 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: Grant
    Filed: April 30, 2020
    Date of Patent: September 5, 2023
    Assignee: SK microworks Co., Ltd.
    Inventors: Gun Uk Kim, Young Min Heo, Sechul Lee, Sang Min Choi
  • Patent number: 11642825
    Abstract: 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: Grant
    Filed: December 7, 2021
    Date of Patent: May 9, 2023
    Assignee: SKC CO., LTD.
    Inventors: A Rim Yu, Gun Uk Kim, Sechul Lee, Sun Ki Lee, Sang Min Choi, Jin-Seok Park, Jung Won Yu
  • Publication number: 20230137902
    Abstract: 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: Application
    Filed: October 29, 2021
    Publication date: May 4, 2023
    Inventors: Gun Uk KIM, Jin-Seok PARK, Sang Min CHOI
  • Patent number: 11630239
    Abstract: 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: Grant
    Filed: October 15, 2020
    Date of Patent: April 18, 2023
    Assignee: SKC CO., LTD.
    Inventors: Gun Uk Kim, Sang Min Choi, Young Min Heo
  • Patent number: 11551584
    Abstract: 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: Grant
    Filed: October 15, 2020
    Date of Patent: January 10, 2023
    Assignee: SKC CO., LTD.
    Inventors: Gun Uk Kim, Young Min Heo, Sang Min Choi
  • Patent number: 11548207
    Abstract: 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: Grant
    Filed: April 30, 2020
    Date of Patent: January 10, 2023
    Assignee: SKC CO., LTD.
    Inventors: Gun Uk Kim, Young Min Heo, Sechul Lee, Jin-Seok Park, Sang Min Choi
  • Publication number: 20220176605
    Abstract: 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: Application
    Filed: December 7, 2021
    Publication date: June 9, 2022
    Inventors: A Rim YU, Gun Uk KIM, Sechul LEE, Sun Ki LEE, Sang Min CHOI, Jin-Seok PARK, Jung Won YU
  • Patent number: 11315705
    Abstract: A cable includes an insulating part and one or more conducting parts disposed inside the insulating part. The insulating part includes a polymer resin layer with a product of shrinkage ratios CMD*TD, which is expressed as a product of a longitudinal shrinkage ratio and a transverse shrinkage ratio, of less than 0.24.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: April 26, 2022
    Assignee: SKC Co., Ltd
    Inventors: Sechul Lee, Young Min Heo, Jung Hee Ki, Sang Min Choi
  • Publication number: 20210125528
    Abstract: 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: Application
    Filed: October 15, 2020
    Publication date: April 29, 2021
    Inventors: Gun Uk KIM, Young Min HEO, Sang Min CHOI
  • Publication number: 20210124090
    Abstract: 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: Application
    Filed: October 15, 2020
    Publication date: April 29, 2021
    Inventors: Gun Uk KIM, Sang Min CHOI, Young Min HEO
  • Publication number: 20200353733
    Abstract: 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: Application
    Filed: April 30, 2020
    Publication date: November 12, 2020
    Inventors: Gun Uk KIM, Young Min HEO, Sechul LEE, Jin-Seok PARK, Sang Min CHOI
  • Publication number: 20200353734
    Abstract: 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: Application
    Filed: April 30, 2020
    Publication date: November 12, 2020
    Inventors: Gun Uk KIM, Young Min HEO, Sechul LEE, Sang Min CHOI
  • Publication number: 20200075194
    Abstract: A cable includes an insulating part and one or more conducting parts disposed inside the insulating part. The insulating part includes a polymer resin layer with a product of shrinkage ratios CMD*TD, which is expressed as a product of a longitudinal shrinkage ratio and a transverse shrinkage ratio, of less than 0.24.
    Type: Application
    Filed: May 2, 2019
    Publication date: March 5, 2020
    Applicant: SKC Co., Ltd.
    Inventors: Sechul LEE, Young Min HEO, Jung Hee KI, Sang Min CHOI
  • Patent number: 10572059
    Abstract: A display device and a driving method thereof, in which the display device includes a display panel including a plurality of pixels electrically connected to data lines and scan lines, a touch sensor including a plurality of touch electrodes, a touch controller for supplying a first driving signal to the touch sensor during a display period, and a data driver for supplying a data signal to the data lines during the display period, and supplying a second driving signal to the data lines during a pressure sensing period.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: February 25, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Il Ho Lee, Sang Min Choi
  • Patent number: 10254905
    Abstract: A touch display apparatus includes a display panel, a touch electrode, a first pressure sensing electrode, a polarizer and a second pressure sensing electrode. The display panel includes a display region and a peripheral region, and displays an image. The touch electrode is disposed on the display region of the display panel, includes a plurality of touch patterns, and detects a touch position. The first pressure sensing electrode is disposed on the peripheral region of the display panel. The touch electrode and the first pressure sensing electrode are disposed in the same layer. The polarizer is disposed on the touch electrode and the first pressure sensing electrode, and includes a dielectric elastomer material. The second pressure sensing electrode is disposed on the polarizer, and overlaps the first pressure sensing electrode.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: April 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Moon Sung Choi, Gyeong-Ub Moon, Sangho Park, Ji Hong Park, Sang Min Choi
  • Patent number: 9922397
    Abstract: There is provided an image display system. The image display system includes a touch controller configured to generate first touch event information and second touch event information each corresponding to a touch signal output from a touch panel, a display data generating unit configured to generate first display data to be displayed during one frame in response to the first touch event information, a graphic processing unit (GPU) configured to combine second display data with the first display data so as to generate output image data, the second display data corresponding to the second touch event information supplied from the touch controller, and a display controller configured to supply output image data generated by the GPU to a display panel.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: March 20, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gyeong Ub Moon, Sang Ho Park, Ji Hong Park, Moon Sung Choi, Sang Min Choi
  • Publication number: 20180067606
    Abstract: A display device and a driving method thereof, in which the display device includes a display panel including a plurality of pixels electrically connected to data lines and scan lines, a touch sensor including a plurality of touch electrodes, a touch controller for supplying a first driving signal to the touch sensor during a display period, and a data driver for supplying a data signal to the data lines during the display period, and supplying a second driving signal to the data lines during a pressure sensing period.
    Type: Application
    Filed: April 5, 2017
    Publication date: March 8, 2018
    Inventors: Il Ho LEE, Sang Min CHOI
  • Patent number: 9841854
    Abstract: A display device according to the present inventive concept includes: a display panel comprising a pixel electrode receiving a data voltage and a common electrode receiving a common voltage; and a touch sensor comprising a plurality of driving electrodes and a plurality of sensing electrodes, wherein the touch sensor applies a touch detection signal to the plurality of driving electrode and detects a touch location by receiving a sense signal from the plurality of sensing electrode in an active mode, and determines whether a touch is made by receiving sense signals of the plurality of sensing electrodes, that are fluctuated by a ripple of a common voltage applied to the common electrode according to driving of the display panel in an idle mode.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: December 12, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji Hong Park, Moon Sung Choi, Sang Min Choi