Patents by Inventor Rizhan HE

Rizhan HE 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).

  • Control method and control circuit of electronic ballast of gas discharge lamp (HID)
    Patent number: 11277891
    Abstract: A control method of an electronic ballast of a gas discharge lamp (HID), to generate a PWM1 signal for controlling on/off of a left upper arm switch, a PWM2 signal for controlling on/off of a right upper arm switch, a PWM3 signal for controlling on/off of a left lower arm switch, and a PWM4 signal for controlling on/off of a right lower arm switch, the PWM1 signal and the PWM3 signal are low frequency signals and have an identical frequency and an opposite phase, the PWM2 signal and the PWM4 signal are high frequency signals. Duty ratios of PWM signals for controlling arms of a semiconductor full bridge circuit are changed according to a power consumption of the gas discharge lamp (HID) to control the power consumption of the gas discharge lamp (HID).
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: March 15, 2022
    Assignee: SHENZHEN NUMBER ENERGY SAVING CORPORATION
    Inventors: Hongchuan Chen, Shengqiu Zhao, Rizhan He, Jiaqin Li
  • CONTROL METHOD AND CONTROL CIRCUIT OF ELECTRONIC BALLAST OF GAS DISCHARGE LAMP (HID)
    Publication number: 20210204372
    Abstract: A control method of an electronic ballast of a gas discharge lamp (HID), to generate a PWM1 signal for controlling on/off of a left upper arm switch, a PWM2 signal for controlling on/off of a right upper arm switch, a PWM3 signal for controlling on/off of a left lower arm switch, and a PWM4 signal for controlling on/off of a right lower arm switch, the PWM1 signal and the PWM3 signal are low frequency signals and have an identical frequency and an opposite phase, the PWM2 signal and the PWM4 signal are high frequency signals. Duty ratios of PWM signals for controlling arms of a semiconductor full bridge circuit are changed according to a power consumption of the gas discharge lamp (HID) to control the power consumption of the gas discharge lamp (HID).
    Type: Application
    Filed: March 17, 2021
    Publication date: July 1, 2021
    Applicant: SHENZHEN NUMBER ENERGY SAVING CORPORATION
    Inventors: Hongchuan CHEN, Shengqiu ZHAO, Rizhan HE, Jiaqin LI