Patents by Inventor Chia-Ling Peng

Chia-Ling Peng 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).

  • Light emitting diode (LED) driving circuit
    Patent number: 8120288
    Abstract: A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes a voltage adjusting unit, a switch unit, and a control unit. The control unit is coupled to the voltage adjusting unit and the switch unit. The voltage adjusting unit outputs a driving voltage to a first end of each of a plurality of load units. The switch unit is coupled to a second end of each of the load units. When one LED string in the load units is coupled to a current source, the voltage adjusting unit adjusts the voltage level of the driving voltage so that the voltage level of the driving voltage of the driving voltage corresponds to the driven LED string. Thereby, a driving problem caused by the variation in electrical characteristics of the LEDs is alleviated.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: February 21, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chia-Lin Liu, Ling Li, Chia-Ling Peng, Kuo-Chung Lo, Chi-Neng Mo
  • LIGHT EMITTING DIODE (LED) DRIVING CIRCUIT
    Publication number: 20110031895
    Abstract: A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes a voltage adjusting unit, a switch unit, and a control unit. The control unit is coupled to the voltage adjusting unit and the switch unit. The voltage adjusting unit outputs a driving voltage to a first end of each of a plurality of load units. The switch unit is coupled to a second end of each of the load units. When one LED string in the load units is coupled to a current source, the voltage adjusting unit adjusts the voltage level of the driving voltage so that the voltage level of the driving voltage of the driving voltage corresponds to the driven LED string. Thereby, a driving problem caused by the variation in electrical characteristics of the LEDs is alleviated.
    Type: Application
    Filed: August 18, 2009
    Publication date: February 10, 2011
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Chia-Lin Liu, Ling Li, Chia-Ling Peng, Kuo-Chung Lo, Chi-Neng Mo