Patents by Inventor Jin CHENGHAO

Jin CHENGHAO 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).

  • LED emitting device and driving method thereof
    Patent number: 9101032
    Abstract: Disclosed are an LED emitting device and driving method thereof. The LED emitting device controls an LED drive switch connected to a first end of an LED string to control an output current supplied to the LED string. The LED emitting device generates feedback information on the output voltage or the output current supplied to the LED string, and uses the output current to sense an open lamp state of the LED string. The LED emitting device uses a voltage at a first end of the LED drive switch to sense a change of the LED string to a normal state from the open lamp state.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: August 4, 2015
    Assignee: Fairchild Korea Semiconductor LTD
    Inventors: Jin-Tae Kim, Dong Jin Park, Shanmei Li, Byunghak Ahn, Jin Chenghao
  • LED Emitting Device and Driving Method Thereof
    Publication number: 20130249406
    Abstract: Disclosed are an LED emitting device and driving method thereof. The LED emitting device controls an LED drive switch connected to a first end of an LED string to control an output current supplied to the LED string. The LED emitting device generates feedback information on the output voltage or the output current supplied to the LED string, and uses the output current to sense an open lamp state of the LED string. The LED emitting device uses a voltage at a first end of the LED drive switch to sense a change of the LED string to a normal state from the open lamp state.
    Type: Application
    Filed: March 18, 2013
    Publication date: September 26, 2013
    Applicant: Fairchild Korea Semiconductor Ltd.
    Inventors: Jin-Tae KIM, Dong Jin PARK, Shanmei LI, Byunghak AHN, Jin CHENGHAO