Patents by Inventor Changchao Liu

Changchao Liu 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).

  • Method and system for reducing current noise of touch terminal
    Patent number: 11025764
    Abstract: A method and a system for reducing current noise of a touch terminal are provided. The method includes: determining that a user receives a voice call via an earpiece of the touch terminal, and controlling the touch terminal to switch from a first touch scan frequency to a second touch scan frequency, where the second touch scan frequency is less than the first touch scan frequency. As can be seen, if the user receives the voice call via the earpiece of the touch terminal, the touch terminal is controlled to switch from the first touch scan frequency to the second touch scan frequency, to effectively reduce the current noise heard by the user by decreasing the touch scan frequency of the touch terminal, so that the periodic current noise is outside a frequency band perceptible to a human ear, thereby improving user experience when receiving the voice call.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: June 1, 2021
    Assignee: SHANGHAI AVIC OPTO ELECTRONICS CO., LTD.
    Inventors: Zhengyuan Huang, Xu Yang, Xupeng Wang, Zhi Zheng, Changchao Liu
  • METHOD AND SYSTEM FOR REDUCING CURRENT NOISE OF TOUCH TERMINAL
    Publication number: 20190278419
    Abstract: A method and a system for reducing current noise of a touch terminal are provided. The method includes: determining that a user receives a voice call via an earpiece of the touch terminal, and controlling the touch terminal to switch from a first touch scan frequency to a second touch scan frequency, where the second touch scan frequency is less than the first touch scan frequency. As can be seen, if the user receives the voice call via the earpiece of the touch terminal, the touch terminal is controlled to switch from the first touch scan frequency to the second touch scan frequency, to effectively reduce the current noise heard by the user by decreasing the touch scan frequency of the touch terminal, so that the periodic current noise is outside a frequency band perceptible to a human ear, thereby improving user experience when receiving the voice call.
    Type: Application
    Filed: March 20, 2019
    Publication date: September 12, 2019
    Applicant: SHANGHAI AVIC OPTO ELECTRONICS CO., LTD.
    Inventors: Zhengyuan Huang, Xu Yang, Xupeng Wang, Zhi Zheng, Changchao Liu