公开(公告)号：US09846252B2

公开(公告)日：2017-12-19

申请号：US15054063

申请日：2016-02-25

Applicant: ASUSTeK COMPUTER INC.

Inventor： Chen-Min Yang ,  Chun-Chieh Lin ,  Tsung-Hsun Hsieh ,  Wen-Hsin Lin

IPC: G01V3/08

CPC classification number: G01V3/08 ,  H04B1/3838

Abstract: A proximity sensor and a mobile communication device thereof are provided. The mobile communication device includes an antenna structure, a matching circuit, a capacitance sensing circuit and a processing circuit. The matching circuit couples to the antenna structure. The capacitance sensing circuit couples to the matching circuit. The capacitance sensing circuit senses a capacitance variation on the antenna structure via the matching circuit and accordingly generates a proximity sensing signal. The processing circuit is coupled to the capacitance sensing circuit to receive the proximity sensing signal. When a signal level of the proximity sensing signal exceeds a first threshold value, an object is determined approaching, and when the signal level of the proximity sensing signal exceeds a second threshold value, a human body is determines approaching. The first and the second threshold value are different.

公开(公告)号：US20170248725A1

公开(公告)日：2017-08-31

申请号：US15054063

申请日：2016-02-25

Applicant: ASUSTeK COMPUTER INC.

Inventor： Chen-Min Yang ,  Chun-Chieh Lin ,  Tsung-Hsun Hsieh ,  Wen-Hsin Lin

IPC: G01V3/08

CPC classification number: G01V3/08 ,  H04B1/3838

Abstract: A proximity sensor and a mobile communication device thereof are provided. The mobile communication device includes an antenna structure, a matching circuit, a capacitance sensing circuit and a processing circuit. The matching circuit couples to the antenna structure. The capacitance sensing circuit couples to the matching circuit. The capacitance sensing circuit senses a capacitance variation on the antenna structure via the matching circuit and accordingly generates a proximity sensing signal. The processing circuit is coupled to the capacitance sensing circuit to receive the proximity sensing signal. When a signal level of the proximity sensing signal exceeds a first threshold value, an object is determined approaching, and when the signal level of the proximity sensing signal exceeds a second threshold value, a human body is determines approaching. The first and the second threshold value are different.