Patents by Inventor Hung-Chun Chung

Hung-Chun Chung 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).

  • Dimmable LED device with low ripple current and driving circuit thereof
    Patent number: 8193738
    Abstract: A dimmable light emitting diode (LED) device with low ripple current includes a LED module, a phase dimmer, a voltage converting module, a driving module and a feedback module. The flyback converter of the voltage converting module adds a secondary forward winding connecting to a phase cut-off detector to provide a detecting voltage in proportion to current level of the output current across the LED module.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: June 5, 2012
    Assignee: Phihong Technology Co., Ltd.
    Inventors: Chung-Jen Chu, Yi-Jing Chen, Hung-Chun Chung
  • DIMMABLE LED DEVICE WITH LOW RIPPLE CURRENT AND DRIVING CIRCUIT THEREOF
    Publication number: 20110031899
    Abstract: A dimmable light emitting diode (LED) device with low ripple current includes a LED module, a phase dimmer, a voltage converting module, a driving module and a feedback module. The flyback converter of the voltage converting module adds a secondary forward winding connecting to a phase cut-off detector to provide a detecting voltage in proportion to current level of the output current across the LED module.
    Type: Application
    Filed: August 7, 2009
    Publication date: February 10, 2011
    Inventors: Chung-Jen Chu, Yi-Jing Chen, Hung-Chun Chung
  • Toothless gear speed reducer
    Patent number: 7329202
    Abstract: A toothless gear speed reducer, which mainly includes an inclined plane cone drive gear, inclined plane conical driven gears and an inclined plane outer gear case drive ring. The toothless gear speed reducer overcomes the difficult problems existent in conventional speed reducers to decrease dimensions and minimize abrasion, and achieves reducing manufacturing time, thereby providing higher efficiency and saving on manufacturing cost.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: February 12, 2008
    Inventor: Hung-Chun Chung
  • Toothless gear speed reducer
    Publication number: 20070084304
    Abstract: A toothless gear speed reducer, which mainly includes an inclined plane cone drive gear, inclined plane conical driven gears and an inclined plane outer gear case drive ring. The toothless gear speed reducer overcomes the difficult problems existent in conventional speed reducers to decrease dimensions and minimize abrasion, and achieves reducing manufacturing time, thereby providing higher efficiency and saving on manufacturing cost.
    Type: Application
    Filed: October 17, 2005
    Publication date: April 19, 2007
    Inventor: Hung-Chun Chung
  • Abdominal fitness equipment installable on a chair
    Publication number: 20060009720
    Abstract: An abdominal fitness equipment installable on a chair, whereby a main body and vibrating belts of a conventional abdominal fitness equipment are installed on the chair. A user sits on the chair, and can utilize the abdominal fitness equipment to achieve body shaping of the abdomen or waist.
    Type: Application
    Filed: July 7, 2004
    Publication date: January 12, 2006
    Inventor: Hung-Chun Chung