Wireless location system in multi-corridor buildings

    公开(公告)号:US11570580B2

    公开(公告)日:2023-01-31

    申请号:US17178888

    申请日:2021-02-18

    申请人: CenTrak, Inc.

    发明人: Israel Amir

    摘要: A system and methods for estimating the location of a mobile device are disclosed. In accordance with one embodiment, a mobile device located within a first corridor of a building receives (1) a first wireless electromagnetic signal and a first ultrasound signal from a first beacon located in the first corridor, (2) a second wireless electromagnetic signal and a second ultrasound signal from a second beacon located in the first corridor, and (3) a third wireless electromagnetic signal from a third beacon located in a second corridor of the building. The first wireless electromagnetic signal, the first ultrasound signal, the second wireless electromagnetic signal, and the second ultrasound signal are used to estimate a location of the mobile device.

    Biometric information sensor and display device having the same

    公开(公告)号:US10783387B2

    公开(公告)日:2020-09-22

    申请号:US16107104

    申请日:2018-08-21

    摘要: A biometric information sensor includes a first substrate and a first sensor electrode disposed on the first substrate. A second sensor electrode is disposed on the first substrate at a same distance from the first substrate as the first sensor electrode. The second sensor electrode is spaced apart from the first sensor electrode. A piezoelectric layer is disposed between the first sensor electrode and the second sensor electrode. A second substrate is disposed on the first sensor electrode, the second sensor electrode, and the piezoelectric layer.