Patents by Inventor Liangfei LU

Liangfei LU 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).

  • Recording Method and Device
    Publication number: 20230319217
    Abstract: A distributed recording system includes a first device and one or more second devices. The first device sends a distributed recording instruction, to control the one or more second devices to perform recording. The one or more second devices send audio data obtained through recording to an upper-layer recording application.
    Type: Application
    Filed: July 22, 2021
    Publication date: October 5, 2023
    Inventors: Xiao Yang, Zhou Zhu, Hao Zheng, Yinan Zhang, Liangfei Lu
  • Overcurrent protection circuit and method for limiting discharge current of battery within safety limiting value
    Patent number: 10090689
    Abstract: An overcurrent protection circuit and method for battery discharge. The overcurrent protection circuit includes a discharge switch tube; a discharge control module which is used for detecting the discharge current of batteries in real time, and judging whether an overcurrent is generated by way of comparing the detected discharge current with a preset limiting value, the discharge control module controlling switch-on of the discharge switch tube if no overcurrent is generated, the discharge control module controlling switch-off of the discharge switch tube if an overcurrent is generated, and the discharge control module locking the discharge switch tube in a switch-off state when the overcurrent has timed out; and a time delay module which is used for judging whether the overcurrent has timed out by way of comparing the time when the overcurrent is generated with a preset delay time.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: October 2, 2018
    Assignee: Hytera Communications Corp., Ltd.
    Inventors: Qihui Pan, Liangfei Lu, Kok Hoong Yu, Yunyuan Xiong
  • OVERCURRENT PROTECTION CIRCUIT AND METHOD FOR BATTERY DISCHARGE
    Publication number: 20160380451
    Abstract: An overcurrent protection circuit and method for battery discharge. The overcurrent protection circuit includes a discharge switch tube; a discharge control module which is used for detecting the discharge current of batteries in real time, and judging whether an overcurrent is generated by way of comparing the detected discharge current with a preset limiting value, the discharge control module controlling switch-on of the discharge switch tube if no overcurrent is generated, the discharge control module controlling switch-off of the discharge switch tube if an overcurrent is generated, and the discharge control module locking the discharge switch tube in a switch-off state when the overcurrent has timed out; and a time delay module which is used for judging whether the overcurrent has timed out by way of comparing the time when the overcurrent is generated with a preset delay time.
    Type: Application
    Filed: December 13, 2013
    Publication date: December 29, 2016
    Inventors: Qihui PAN, Liangfei LU, Kok Hoong YU, Yunyuan XIONG