Patents by Inventor Deshui Yu

Deshui Yu 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).

  • Current ripple canceling LED driver
    Patent number: 9107260
    Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 11, 2015
    Assignee: Shanghai Bright Power Semiconductor Co., Ltd.
    Inventors: Shungen Sun, Deshui Yu, Liqiang Hu
  • CURRENT RIPPLE CANCELING LED DRIVER
    Publication number: 20140354186
    Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.
    Type: Application
    Filed: September 27, 2013
    Publication date: December 4, 2014
    Applicant: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Shungen Sun, Deshui Yu, Liqiang Hu