Patents Assigned to Guangzhou On-Bright Electronics Co., Ltd.
  • Patent number: 8947012
    Abstract: Systems and methods are provided for regulating a string current flowing through a string of one or more light emitting diodes. A system controller includes a first controller terminal, a second controller terminal and a third controller terminal. The first controller terminal is coupled to a base terminal of a bipolar junction transistor, the bipolar junction transistor further including an emitter terminal and a collector terminal, the collector terminal being connected to the string of one or more light emitting diodes. The second controller terminal is coupled to the emitter terminal of the bipolar junction transistor and to a first resistor terminal of a resistor associated with a resistance. The third controller terminal is coupled to a second resistor terminal of the resistor. In addition, the system controller is configured to receive a reference voltage, receive an emitter voltage, and output a base current.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: February 3, 2015
    Assignee: Guangzhou On-Bright Electronics Co., Ltd.
    Inventors: Qiang Luo, Lieyi Fang, Zhiliang Chen
  • Patent number: 8917527
    Abstract: System and method for regulating a power converter. The system includes a first signal processing component configured to receive at least a sensed signal and generate a first signal. The sensed signal is associated with a primary current flowing through a primary winding coupled to a secondary winding for a power converter. Additionally, the system includes a second signal processing component configured to generate a second signal, an integrator component configured to receive the first signal and the second signal and generate a third signal, and a comparator configured to process information associated with the third signal and the sensed signal and generate a comparison signal based on at least information associated with the third signal and the sensed signal.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: December 23, 2014
    Assignee: Guangzhou On-Bright Electronics Co., Ltd.
    Inventors: Lieyi Fang, Guo Wei Lin
  • Patent number: 8891256
    Abstract: System and method for regulating a power converter. The system includes a comparator configured to receive a first signal and a second signal and generate a comparison signal based on at least information associated with the first signal and the second signal. The first signal is associated with at least an output current of a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive at least the comparison signal and generate a modulation signal based on at least information associated with the comparison signal, and a driver component configured to receive the modulation signal and output a drive signal to a switch to adjust a primary current flowing through a primary winding of the power converter. The modulation signal is associated with a modulation frequency corresponding to a modulation period.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: November 18, 2014
    Assignee: Guangzhou On-Bright Electronics Co., Ltd.
    Inventors: Lieyi Fang, Guo Wei Lin