Patents by Inventor Hwa-Kyung Choi

Hwa-Kyung 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).

  • Backlight unit of direct type
    Patent number: 7967490
    Abstract: The present invention provides a backlight unit including an LED module and a frame separately, and each separated part is stable and is capable of simple use and assembly. The backlight unit of direct type includes a plurality of makeup LED modules including an LED package of direct type on a PCB and a heat sink releasing heat generated from driving the LED package of direct type, a reflection plate reflecting light emitted from the makeup LED module to a front face, and attached at the remaining surface except for the makeup LED packages, an optical sheet disposed on the reflection plate, and improving brightness and uniformity of the light emitted from the makeup LED module and the reflection plate, and guide the light into a front face of the optical sheet and a frame including a guide rail to combine the makeup LED module by a sliding combination.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: June 28, 2011
    Assignee: Alti-Electronics Co., Ltd.
    Inventors: Dong-Soo Kim, Hwa-kyung Choi
  • BACKLIGHT UNIT OF DIRECT TYPE
    Publication number: 20090002988
    Abstract: The present invention provides a backlight unit including an LED module and a frame separately, and each separated part is stable and is capable of simple use and assembly. The backlight unit of direct type includes a plurality of makeup LED modules including an LED package of direct type on a PCB and a heat sink releasing heat generated from driving the LED package of direct type, a reflection plate reflecting light emitted from the makeup LED module to a front face, and attached at the remaining surface except for the makeup LED packages, an optical sheet disposed on the reflection plate, and improving brightness and uniformity of the light emitted from the makeup LED module and the reflection plate, and guide the light into a front face of the optical sheet and a frame including a guide rail to combine the makeup LED module by a sliding combination.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 1, 2009
    Applicant: Alti-electronics Co., Ltd.
    Inventors: Dong-Soo KIM, Hwa-Kyung CHOI
  • Method for manufacturing lens for led package
    Publication number: 20080254557
    Abstract: A method for manufacturing a lens for a light emitting diode (LED) package is disclosed. The method for manufacturing a lens for an LED package includes: forming a dome lens on each of a plurality of LED packages placed on a fixing plate, the dome lens made of silicon; forming a concave groove in the dome lens by using a jig for pressing the dome lens; curing the dome lens; and removing the LED packages from the fixing plate.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 16, 2008
    Applicant: ALTI-ELECTRONICS CO., LTD.
    Inventors: Dong-Soo Kim, Hwa-Kyung Choi, Young-Seok Yoon
  • Light emitting diode (LED) package
    Patent number: D549187
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: August 21, 2007
    Assignee: Alti-Electronics Co., Ltd.
    Inventors: Ik-Seong Park, Jin-Won Lee, Chi-Ok In, Sun-Hong Kim, Hwa-Kyung Choi
  • Illumination tool using the light emitting diode
    Patent number: D602449
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: October 20, 2009
    Assignee: Alti-Electronics Co., Ltd
    Inventors: Dong-Soo Kim, Hwa-Kyung Choi