Patents by Inventor Sang-Hwan Cha

Sang-Hwan Cha 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: 20240109518
    Abstract: An apparatus for cleaning a sensor includes: at least one fluid flow path unit assembled and arranged to correspond to a size and a field of view (FOV) region of a sensor unit and formed with a spray flow path for flowing a fluid supplied through an inlet nozzle, a cover unit coupled to each of the fluid flow path units to shield an opened upper surface of the fluid flow path unit, and a spray nozzle unit selectively coupled to the cover unit and formed so that the fluid flowing along the spray flow path is sprayed toward the FOV region.
    Type: Application
    Filed: February 23, 2023
    Publication date: April 4, 2024
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Kyung Hwan Kim, Sang Heon Wang, Dong Eun Cha, Nak Kyoung Kong
  • Patent number: 8363209
    Abstract: Disclosed is a maskless exposure method, where it is possible to perform a more precise optical alignment using a first pattern of a maskless exposure part and a second pattern of a main reference unit, and it is also possible to reduce generation of a blur in an exposed pattern.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: January 29, 2013
    Assignee: LG Electronics Inc.
    Inventors: Young Hoon Shin, Won Ho Seo, Myung Ju Park, Hyung Jin Lee, Sang Hwan Cha, Tae Ho Lee, Chang Ju Rhee
  • Patent number: 8072580
    Abstract: The present invention relates to a maskless exposure apparatus and a method of manufacturing a substrate for a display using the same. In the present invention, a substrate 22 is disposed on a scan stage 20 that can be moved in horizontal and vertical directions. Meanwhile, an optical unit 30 for generating light available for exposure is disposed above the substrate 22. Light that has passed though the optical unit 30 is transferred to a DMD unit 40. The DMD unit 40 is provided with DMDs 42 for selectively reflecting the light to form a pattern on the substrate 22. The DMDs 42 are arranged in a plurality of rows in such a manner that DMDs 42 in the same row are spaced apart by a predetermined distance from each other and DMDs 42 in different rows partially overlap with each other at one end portions thereof. Thus, when the DMDs 42 scan the substrate 22, scan marks 62 are produced discontinuously in two straight lines.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: December 6, 2011
    Assignee: LG Electronics Inc.
    Inventors: Sang Hwan Cha, Soo Hoa Jeong
  • Patent number: 7916277
    Abstract: An exposing apparatus maintains uniformly a gap between a substrate and a mask stage. The substrate is disposed on a substrate chuck and the substrate chuck is supported by gap motors and air cylinders. The gap motors control the gap between the substrate and the mask stage and the air cylinders support the deflect portion of the substrate chuck to maintain the flatness of the whole area of the substrate.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: March 29, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Hee-Uk Chung, Sang-Hwan Cha
  • Publication number: 20100208229
    Abstract: Disclosed is a maskless exposure method, where it is possible to perform a more precise optical alignment using a first pattern of a maskless exposure part and a second pattern of a main reference unit, and it is also possible to reduce generation of a blur in an exposed pattern.
    Type: Application
    Filed: June 25, 2008
    Publication date: August 19, 2010
    Applicant: LG Electronics Inc
    Inventors: Young Hoon Shin, Won Ho Seo, Myung Ju Park, Hyung Jin Lee, Sang Hwan Cha, Tae Ho Lee, Chang Ju Rhee
  • Publication number: 20080084548
    Abstract: The present invention relates to a maskless exposure apparatus and a method of manufacturing a substrate for a display using the same. In the present invention, a substrate 22 is disposed on a scan stage 20 that can be moved in horizontal and vertical directions. Meanwhile, an optical unit 30 for generating light available for exposure is disposed above the substrate 22. Light that has passed though the optical unit 30 is transferred to a DMD unit 40. The DMD unit 40 is provided with DMDs 42 for selectively reflecting the light to form a pattern on the substrate 22. The DMDs 42 are arranged in a plurality of rows in such a manner that DMDs 42 in the same row are spaced apart by a predetermined distance from each other and DMDs 42 in different rows partially overlap with each other at one end portions thereof. Thus, when the DMDs 42 scan the substrate 22, scan marks 62 are produced discontinuously in two straight lines.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 10, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Sang Hwan Cha, Soo Hoa Jeong
  • Publication number: 20070008513
    Abstract: An exposing apparatus comprises a mask stage, a supporter that supports the mask stage, a substrate below the mask stage, and a substrate chuck that supports the substrate. The exposing apparatus further comprises a substrate chuck moving mechanism that moves the substrate chuck, a gap motor unit installed on the substrate chuck moving mechanism that controls a gap between the substrate and the mask stage, and a substrate chuck flatness maintaining mechanism that maintains a flatness of the substrate chuck.
    Type: Application
    Filed: May 30, 2006
    Publication date: January 11, 2007
    Inventors: Hee-Uk Chung, Sang-Hwan Cha