Patents by Inventor Ying-Jhih Wu

Ying-Jhih Wu 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).

  • Single stage low boost/buck ratio stand-alone solar energy power generating circuit and system thereof
    Patent number: 8541973
    Abstract: A single stage low boost/buck ratio stand-alone solar energy power generating circuit with a system thereof is a simplification of a two-stage type circuit. The two-stage circuit, which has a storage unit, a charging converter circuit for charging the storage unit, and a discharging converter circuit for discharging the stored power to a load, is analyzed and categorized such that a circuit structure is selected via a suitable simplified combination to commonly use the elements constituting the charging and the discharging converter circuits so as to form the single stage circuit with less elements, volume and weight for reducing the production cost of the circuit.
    Type: Grant
    Filed: November 22, 2009
    Date of Patent: September 24, 2013
    Assignee: Richtek Technology Corp.
    Inventors: Sheng-Yu Tseng, Ying-Jhih Wu, Kuo-Chi Lin
  • Method and circuit for tracking maximum power of a photo-voltaic array
    Patent number: 8174281
    Abstract: A method and a circuit for tracking maximum power of a photo-voltaic array performs the operation of load increase/decrease with a preset current difference and determines if the photo-voltaic array operates at zone A or zone B based on change of the output voltage before and after the operation to decide the next operation being for load increase or load decrease. It is not necessary for tracking the maximum power with the multiplier to estimate the output power of the photo-voltaic array. Therefore, the circuit for tracking the maximum power of the photo-voltaic array is capable of being simplified and joined to the pulse width modulation circuit to form an integrated circuit with a function of tracking the maximum power.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: May 8, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Sheng-Yu Tseng, Ying-Jhih Wu, Kuo-Chi Liu
  • SINGLE STAGE LOW BOOST/BUCK RATIO STAND-ALONE SOLAR ENERGY POWER GENERATING CIRCUIT AND SYSTEM THEREOF
    Publication number: 20110012551
    Abstract: A single stage low boost/buck ratio stand-alone solar energy power generating circuit with a system thereof is a simplification of a two-stage type circuit. The two-stage circuit, which has a storage unit, a charging converter circuit for charging the storage unit, and a discharging converter circuit for discharging the stored power to a load, is analyzed and categorized such that a circuit structure is selected via a suitable simplified combination to commonly use the elements constituting the charging and the discharging converter circuits so as to form the single stage circuit with less elements, volume and weight for reducing the production cost of the circuit.
    Type: Application
    Filed: November 22, 2009
    Publication date: January 20, 2011
    Applicant: Richtek Technology Corp.
    Inventors: Sheng-Yu Tseng, Ying-Jhih Wu, Kuo-Chi Liu