Patents by Inventor Chang-Hwan Song

Chang-Hwan Song 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: 20240144893
    Abstract: A display panel includes an amorphous silicon gate driver in which a lower voltage than the gate-off voltage output from the gate driver is applied to an adjacent stage as a low voltage transmission signal.
    Type: Application
    Filed: January 10, 2024
    Publication date: May 2, 2024
    Inventors: JAE-HOON LEE, SEUNG-HWAN MOON, YONG-SOON LEE, YOUNG-SU KIM, CHANG-HO LEE, WHEE-WON LEE, JUN-YONG SONG, YU-HAN BAE
  • Patent number: 11942553
    Abstract: The semiconductor device includes a substrate, a stack structure including gate patterns and interlayer insulating films that are alternately stacked on the substrate, an insulating pillar extending in a thickness direction of the substrate within the stack structure, a polycrystalline metal oxide film extending along a sidewall of the insulating pillar between the insulating pillar and the stack structure, a liner film having a transition metal between the insulating pillar and the polycrystalline metal oxide film, and a tunnel insulating film, a charge storage film, and a blocking insulating film which are disposed in order between the polycrystalline metal oxide film and the gate patterns.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: March 26, 2024
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae Kyeong Jeong, Yun Heub Song, Chang Hwan Choi, Hyeon Joo Seul
  • Patent number: 11186281
    Abstract: An apparatus and a method for preventing a vehicle from falling into a sinkhole are provided. The apparatus prevents the vehicle from being unnecessarily stopped by determining whether to stop the vehicle based on a size of the sinkhole while preventing the vehicle from falling into the sinkhole on a road. The apparatus includes a sensor that is mounted on the vehicle to measure a distance to a ground and a controller that determines a size of the sinkhole based on the distance to the ground and determines whether to stop the vehicle while preventing the vehicle from falling into the sinkhole on a road.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: November 30, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Byeong Hwa Kim, Chang Hwan Song, Dong Hun Yang, Jun Ho Yang
  • Publication number: 20200290616
    Abstract: An apparatus and a method for preventing a vehicle from falling into a sinkhole are provided. The apparatus prevents the vehicle from being unnecessarily stopped by determining whether to stop the vehicle based on a size of the sinkhole while preventing the vehicle from falling into the sinkhole on a road. The apparatus includes a sensor that is mounted on the vehicle to measure a distance to a ground and a controller that determines a size of the sinkhole based on the distance to the ground and determines whether to stop the vehicle while preventing the vehicle from falling into the sinkhole on a road.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 17, 2020
    Inventors: Byeong Hwa Kim, Chang Hwan Song, Dong Hun Yang, Jun Ho Yang
  • Patent number: 10107488
    Abstract: Provided is a flexible LED light source panel including: a flexible LED module in which a plurality of LEDs is disposed in an array form on a flexible circuit board; a protective sheet stacked on the flexible LED module and diffusing light from the LEDs; a heat conduction sheet disposed under the flexible LED module; a heat radiation sheet disposed under the heat conduction sheet, made of fireproof fiber, and coated with a carbon nano tube molecule having a grid or vertical structure; and a light source guide having a quadrilateral shape.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: October 23, 2018
    Assignee: The F.J. Westcott Company
    Inventor: Chang Hwan Song
  • Publication number: 20160281974
    Abstract: Provided is a flexible LED light source panel including: a flexible LED module in which a plurality of LEDs is disposed in an array form on a flexible circuit board; a protective sheet stacked on the flexible LED module and diffusing light from the LEDs; a heat conduction sheet disposed under the flexible LED module; a heat radiation sheet disposed under the heat conduction sheet, made of fireproof fiber, and coated with a carbon nano tube molecule having a grid or vertical structure; and a light source guide having a quadrilateral shape.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Inventor: Chang Hwan SONG
  • Patent number: 9395068
    Abstract: Provided is a flexible LED light source panel including: a flexible LED module in which a plurality of LEDs is disposed in an array form on a flexible circuit board; a protective sheet stacked on the flexible LED module and diffusing light from the LEDs; a heat conduction sheet disposed under the flexible LED module; a heat radiation sheet disposed under the heat conduction sheet, made of fireproof fiber, and coated with a carbon nano tube molecule having a grid or vertical structure; and a light source guide having a quadrilateral shape.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: July 19, 2016
    Inventor: Chang Hwan Song
  • Publication number: 20150330610
    Abstract: Provided is a flexible LED light source panel including: a flexible LED module in which a plurality of LEDs is disposed in an array form on a flexible circuit board; a protective sheet stacked on the flexible LED module and diffusing light from the LEDs; a heat conduction sheet disposed under the flexible LED module; a heat radiation sheet disposed under the heat conduction sheet, made of fireproof fiber, and coated with a carbon nano tube molecule having a grid or vertical structure; and a light source guide having a quadrilateral shape.
    Type: Application
    Filed: March 27, 2015
    Publication date: November 19, 2015
    Inventor: Chang Hwan Song
  • Patent number: 8387117
    Abstract: A context-aware role-based access control system and a control method thereof. The context-aware role-based access control system includes: a context-aware user assignment manager (CAUAM) for performing a role assignment function, a role delegation function, or a role revocation function for a user according to a context of the user, based on a preset context request condition; a context-aware permission assignment manager (CAPAM) for performing a permission modification, a permission restoration, and a personalized permission modification for a permission, which the role has, according to changes in the context of the user; an information repository for storing a user profile and context information; and an access control manager (ACM) for controlling the context-aware user assignment manager, the context-aware permission assignment manager, and the information repository, and processing an access control request.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: February 26, 2013
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Young-Ik Eom, Jung-Hwan Choi, Hyun-Su Jang, Youn-Woo Kim, Dong-Hyun Kang, Chang-Hwan Song
  • Publication number: 20100100941
    Abstract: A context-aware role-based access control system and a control method thereof. The context-aware role-based access control system includes: a context-aware user assignment manager (CAUAM) for performing a role assignment function, a role delegation function, or a role revocation function for a user according to a context of the user, based on a preset context request condition; a context-aware permission assignment manager (CAPAM) for performing a permission modification, a permission restoration, and a personalized permission modification for a permission, which the role has, according to changes in the context of the user; an information repository for storing a user profile and context information; and an access control manager (ACM) for controlling the context-aware user assignment manager, the context-aware permission assignment manager, and the information repository, and processing an access control request.
    Type: Application
    Filed: February 16, 2009
    Publication date: April 22, 2010
    Applicant: SUNGKYUNKWAN UNIVERSITY Foundation for Corporate Collaboration
    Inventors: Young-Ik Eom, Jung-Hwan Choi, Hyun-Su Jang, Youn-Woo Kim, Dong-Hyun Kang, Chang-Hwan Song
  • Publication number: 20060099934
    Abstract: Disclosed herein is an incoming call information notification method in an incoming call information notification system. The method includes the steps of a subscriber setting a call forwarding condition that call forwarding be performed when a called terminal does not answer or is busy, and setting an incoming call information receiving terminal, for an intelligent network; the intelligent network notifying the incoming call information receiving terminal of the arrival of a call at the called terminal when a calling party attempts the call to the called terminal; the intelligent network attempting the call to the called terminal; and if, as a result of the attempt, the intelligent network receives information about a lack of answer or a busy state, the intelligent network notifying the incoming call information receiving terminal of call forwarding.
    Type: Application
    Filed: November 8, 2005
    Publication date: May 11, 2006
    Inventors: Chang-Hwan Song, Yu-Seok Kim, Yong-Suk Jang