Patents by Inventor CHIEN-CHING LI

CHIEN-CHING LI 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 current balance driving circuit
    Patent number: 9030109
    Abstract: A LED current-balance driving circuit having a current-balance coil set, a switching unit, and a control circuit is provided. The current-balance coil set has at least a first coil and a second coil, both of which are in connection with respective LED strings, for balancing currents flowing through the LED strings. The switching unit and a leakage inductance of current-balance coil set are utilized to facilitate the voltage conversion for driving the LED strings. A duty cycle of the switching unit is controlled by the control circuit according to the currents flowing through the LED strings.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: May 12, 2015
    Assignee: Niko Semiconductor Co., Ltd.
    Inventors: Chien-Ching Li, Chung-Ming Leng
  • LED CURRENT BALANCE DRIVING CIRCUIT
    Publication number: 20130134887
    Abstract: A LED current-balance driving circuit having a current-balance coil set, a switching unit, and a control circuit is provided. The current-balance coil set has at least a first coil and a second coil, both of which are in connection with respective LED strings, for balancing currents flowing through the LED strings. The switching unit and a leakage inductance of current-balance coil set are utilized to facilitate the voltage conversion for driving the LED strings. A duty cycle of the switching unit is controlled by the control circuit according to the currents flowing through the LED strings.
    Type: Application
    Filed: July 20, 2012
    Publication date: May 30, 2013
    Applicant: NIKO SEMICONDUCTOR CO., LTD.
    Inventors: CHIEN-CHING LI, CHUNG-MING LENG