Patents by Inventor Man-Chee LIU

Man-Chee 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).

  • Publication number: 20230368628
    Abstract: A cigarette smoke alarm device for non-smoking space, including: a thermal image sensing unit, which includes an infrared sensing array for sensing a thermal image in a non-smoking space; and an image processing circuit coupled with the thermal image sensing unit to receive the thermal image, the image processing circuit including a control unit, a memory and a communication interface, and the control unit being coupled with the memory and the communication interface, where the memory is used to store the thermal image, and the control unit is used for performing a smoke image evaluation operation on the thermal image to generate a detection result of a smoking event, and transmitting a data signal representing the detection result to an external device through the communication interface.
    Type: Application
    Filed: June 1, 2022
    Publication date: November 16, 2023
    Inventor: Man-Chee LIU
  • Patent number: 10942263
    Abstract: A portable radar sensing device comprises: a millimeter-wave MIMO radar unit; a control unit, including at least one processor and at least one memory; at least one information outputting unit; and an operation interface; wherein the control unit is coupled to the millimeter-wave MIMO radar unit, the at least one information outputting unit and the operation interface for processing a biological detecting operation, and the biological detecting operation includes a space scanning operation and a biological target scanning operation.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: March 9, 2021
    Inventor: Man-Chee Liu
  • Patent number: 10735921
    Abstract: A fireman positioning system includes: a first radio wave emitting device and a second radio wave emitting device, spaced with a predetermined distance and utilized for correspondingly emitting a first frequency modulated signal and a second frequency modulated signal; and a position receiving device, carried or worn by a fireman, and utilized for receiving the first frequency modulating signal and the second frequency modulating signal, and can demodulate the first frequency modulated signal via a first carrier signal so as to obtain a first output signal, and demodulate the second frequency modulated signal via a second carrier signal so as to obtain a second output signal, wherein a phase difference is formed between the first output signal and the second output signal, and the position receiving device can determine a direction angle of the fireman relative to the two radio wave emitting devices via the phase difference.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: August 4, 2020
    Inventor: Man-Chee Liu
  • Publication number: 20200021957
    Abstract: A fireman positioning system includes: a first radio wave emitting device and a second radio wave emitting device, spaced with a predetermined distance and utilized for correspondingly emitting a first frequency modulated signal and a second frequency modulated signal; and a position receiving device, carried or worn by a fireman, and utilized for receiving the first frequency modulating signal and the second frequency modulating signal, and can demodulate the first frequency modulated signal via a first carrier signal so as to obtain a first output signal, and demodulate the second frequency modulated signal via a second carrier signal so as to obtain a second output signal, wherein a phase difference is formed between the first output signal and the second output signal, and the position receiving device can determine a direction angle of the fireman relative to the two radio wave emitting devices via the phase difference.
    Type: Application
    Filed: June 24, 2019
    Publication date: January 16, 2020
    Inventor: Man-Chee LIU
  • Patent number: 10484830
    Abstract: An indoor positioning system for fireman includes: a wireless tag reading device, worn or carried by a fireman; and a plurality of wireless tags, disposed in a plurality of positioning points defined in an indoor space and each of the wireless tags having a memory for storing a location data, where each of the location data is corresponding to one of the plurality of positioning points; when in use, the wireless tag reading device is coupled with at least one of the plurality of wireless tags within a sensing range via a wireless means, so that at least one of the location data corresponding to at least one positioning point defined in the indoor space is obtained.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 19, 2019
    Inventor: Man-Chee Liu
  • Publication number: 20190056487
    Abstract: A portable radar sensing device comprises: a millimeter-wave MIMO radar unit; a control unit, including at least one processor and at least one memory; at least one information outputting unit; and an operation interface; wherein the control unit is coupled to the millimeter-wave MIMO radar unit, the at least one information outputting unit and the operation interface for processing a biological detecting operation, and the biological detecting operation includes a space scanning operation and a biological target scanning operation.
    Type: Application
    Filed: November 9, 2017
    Publication date: February 21, 2019
    Inventor: Man-Chee LIU
  • Publication number: 20160055683
    Abstract: The present invention provides an attendance checking device, which includes: a hand-held terminal having a first battery, a first controller, a first displayer and a first wireless module, wherein the first wireless module is able to emit a wireless inquiring signal; and at least one wireless tag having a second battery, a second controller, a second displayer and a second wireless module, wherein the second wireless module is able to receive the wireless inquiring signal and send back an acknowledge signal to the first wireless module, and the acknowledge signal is displayed on the first displayer for enabling the user of the hand-held terminal to know the status of the user of the wireless tag. Accordingly, the attendance checking device is able to achieve a function of automatic attendance checking.
    Type: Application
    Filed: December 24, 2014
    Publication date: February 25, 2016
    Inventor: Man-Chee LIU