Patents by Inventor Cheol-Su Lee

Cheol-Su Lee 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).

  • Patent number: 11817238
    Abstract: The present invention provides a magnetic movement path control device including: a magnetic force moving unit including a permanent magnet generating a permanent magnetic force, a first pole piece attached to a first surface of the permanent magnet, and a second pole piece attached to a second surface of the permanent magnet; a first outer pole piece in contact with the magnetic force moving unit to form a magnetic path; a second outer pole piece in contact with the magnetic force moving unit to form a magnetic path different from the magnetic path formed by the first outer pole piece; and a magnetic path control member releasing or generating the magnetic path by allowing the magnetic force moving unit to come into contact with the first outer pole piece and be spaced apart from or come in contact with the second outer pole piece, wherein the magnetic force moving unit moves between a first position where at least one of the first pole piece and the second pole piece is in contact with the first outer pole
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 14, 2023
    Assignee: UND CO., LTD.
    Inventor: Cheol Su Lee
  • Patent number: 11651742
    Abstract: An organic light emitting display device includes an organic light emitting element emitting light, a driving transistor configured to control a driving current supplied to the organic light emitting element, a first switch transistor configured to transfer a voltage input through a data line to a first node of the driving transistor, a second switch transistor turned on/off simultaneously with the first switch transistor to connect a second node of the driving transistor and a sensing line, a sensing capacitor connected to the sensing line to store a sensing voltage during an organic light emitting element threshold voltage sensing period, and a first switch configured to disconnect the sensing capacitor from the sensing line during a period in which sensing data for sensing a threshold voltage of the organic light emitting element is input to the data line and to connect the sensing capacitor to the sensing line during the organic light emitting element threshold voltage sensing period.
    Type: Grant
    Filed: June 1, 2022
    Date of Patent: May 16, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Cheol Su Lee, Dong Hoon Kim
  • Patent number: 11645979
    Abstract: The present disclosure relates to a display device and a driving method thereof. The display device includes a sensing unit configured to sense electrical properties of each of pixels; a timing controller including a compensation unit configured to modulate pixel data to be written to the pixels based on sensed data from the sensing unit, a sensing error processing unit configured to analyze the sensed data to detect a sensing error, and a gate control unit configured to output a gate timing control signal; a level shifter configured to receive the gate timing control signal and output a clock; and a gate driver configured to receive the clock from the level shifter and supplying a gate signal to the gate lines, wherein the sensing error processing unit resets the timing controller when the sensing error is detected.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: May 9, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Cheol Su Lee, Joon Keun Song
  • Publication number: 20220415264
    Abstract: An organic light emitting display device includes an organic light emitting element emitting light, a driving transistor configured to control a driving current supplied to the organic light emitting element, a first switch transistor configured to transfer a voltage input through a data line to a first node of the driving transistor, a second switch transistor turned on/off simultaneously with the first switch transistor to connect a second node of the driving transistor and a sensing line, a sensing capacitor connected to the sensing line to store a sensing voltage during an organic light emitting element threshold voltage sensing period, and a first switch configured to disconnect the sensing capacitor from the sensing line during a period in which sensing data for sensing a threshold voltage of the organic light emitting element is input to the data line and to connect the sensing capacitor to the sensing line during the organic light emitting element threshold voltage sensing period.
    Type: Application
    Filed: June 1, 2022
    Publication date: December 29, 2022
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Cheol Su LEE, Dong Hoon KIM
  • Publication number: 20220139325
    Abstract: The present disclosure relates to a display device and a driving method thereof. The display device includes a sensing unit configured to sense electrical properties of each of pixels; a timing controller including a compensation unit configured to modulate pixel data to be written to the pixels based on sensed data from the sensing unit, a sensing error processing unit configured to analyze the sensed data to detect a sensing error, and a gate control unit configured to output a gate timing control signal; a level shifter configured to receive the gate timing control signal and output a clock; and a gate driver configured to receive the clock from the level shifter and supplying a gate signal to the gate lines, wherein the sensing error processing unit resets the timing controller when the sensing error is detected.
    Type: Application
    Filed: October 25, 2021
    Publication date: May 5, 2022
    Inventors: Cheol Su LEE, Joon Keun SONG
  • Publication number: 20210335529
    Abstract: The present invention provides a magnetic movement path control device including: a magnetic force moving unit including a permanent magnet generating a permanent magnetic force, a first pole piece attached to a first surface of the permanent magnet, and a second pole piece attached to a second surface of the permanent magnet; a first outer pole piece in contact with the magnetic force moving unit to form a magnetic path; a second outer pole piece in contact with the magnetic force moving unit to form a magnetic path different from the magnetic path formed by the first outer pole piece; and a magnetic path control member releasing or generating the magnetic path by allowing the magnetic force moving unit to come into contact with the first outer pole piece and be spaced apart from or come in contact with the second outer pole piece, wherein the magnetic force moving unit moves between a first position where at least one of the first pole piece and the second pole piece is in contact with the first outer pole
    Type: Application
    Filed: November 22, 2019
    Publication date: October 28, 2021
    Inventor: Cheol Su LEE
  • Publication number: 20080120119
    Abstract: A method for servicing an electronic certificate for a big-name brand. An electronic certificate (1) per goods is created and transmitted to the client (50) such as a mobile phone, etc., through a communication network (40) by request, the electronic certificate (1) comprising an identification code, a secret code, a character image, a management program, etc., and the management program being constructed so as for the electronic certificate (1) to be only able to move after its creation. Then, the character image of the electronic certificate (1) is displayed on the client (50), thereby directly showing possession of the goods of the big-name brand or genuine quality without any authentication. Authentication for the goods can be always achieved.
    Type: Application
    Filed: February 11, 2005
    Publication date: May 22, 2008
    Inventor: Cheol-Su Lee
  • Publication number: 20040058088
    Abstract: Disclosed is a processing method for forming a thick film having an improved adhesion to a surface-modified substrate and an apparatus thereof enabling to form a thick film having the improved adhesion to a polymeric surface by modifying the polymeric surface to have a hydrophilic property. The method includes the steps of preparing a substrate of a polymer material, surface-modifying the substrate, forming a seed layer on the substrate, and forming the thick film on the seed layer. The apparatus includes an unloading area supplying a substrate of a polymer material, a surface treating area modifying a surface of the substrate, a seed layer formation area forming a seed layer on the surface-modified substrate, a thick film formation area forming a thick film on the seed layer, and a loading area loading the substrate.
    Type: Application
    Filed: September 2, 2003
    Publication date: March 25, 2004
    Inventors: Young-Whoan Beag, Sung Han, Jun-Sik Cho, Cheol-Su Lee, Sung-Soo Koh, Jin-Woo Seok