Patents by Inventor Cooper Li Tak Cheung

Cooper Li Tak Cheung 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).

  • Multi-zone pressure sensitive mat with two electrodes
    Patent number: 11793463
    Abstract: The present invention discloses a multi-zone pressure sensitive mat comprises a first electrode and a second electrode, wherein: the first electrode connects to an input port of a central processing unit and the second electrode connects to the digital ground return port of the central processing unit; the central processing unit comprises at least one MCU, the MCU comprises a first ADC unit and a second ADC unit, wherein electrical signal form the input port is split into original DC signal and its AC signal, wherein the DC signal is fed into the first ADC unit from the input port, the AC signal is bypassed through a capacitor from the input port, filtered through a LPF, amplified through an amplifying circuit and fed into the second ADC unit; wherein a preset threshold voltage level and a preset interval of time are stored in the MCU; the MCU detects the presence, the absence and the movement of human on bed by measuring voltage value from output port of the first ADC unit and amplitude of the AC signal fro
    Type: Grant
    Filed: January 7, 2021
    Date of Patent: October 24, 2023
    Assignee: VJ Electronics Limited
    Inventor: Cooper Li Tak Cheung
  • Multi-Zone Pressure Sensitive Mat with Two Electrodes
    Publication number: 20220211326
    Abstract: The present invention discloses a multi-zone pressure sensitive mat comprises a first electrode and a second electrode, wherein: the first electrode connects to an input port of a central processing unit and the second electrode connects to the digital ground return port of the central processing unit; the central processing unit comprises at least one MCU, the MCU comprises a first ADC unit and a second ADC unit, wherein electrical signal form the input port is split into original DC signal and its AC signal, wherein the DC signal is fed into the first ADC unit from the input port, the AC signal is bypassed through a capacitor from the input port, filtered through a LPF, amplified through an amplifying circuit and fed into the second ADC unit; wherein a preset threshold voltage level and a preset interval of time are stored in the MCU; the MCU detects the presence, the absence and the movement of human on bed by measuring voltage value from output port of the first ADC unit and amplitude of the AC signal fro
    Type: Application
    Filed: January 7, 2021
    Publication date: July 7, 2022
    Applicant: EVISION TECHNOLOGY LIMITED
    Inventor: Cooper Li Tak Cheung