The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 2022
Filed:
May. 15, 2019
Applicant:
Semtech Corporation, Camarillo, CA (US);
Inventors:
Chaouki Rouaissia, Neuchâtel, CH;
Hehai Zheng, Hunan Province, CN;
Assignee:
Semtech Corporation, Camarillo, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/3231 (2019.01); H04M 1/72454 (2021.01);
U.S. Cl.
CPC ...
G06F 1/3231 (2013.01); H04M 1/72454 (2021.01); H04M 2250/12 (2013.01);
Abstract
A capacitive proximity sensor for use in mobile devices such as smartphones and connected tables, in which it is used to switch off a display () when the device is brought to the ear. The capacitive sensor is arranged for rejecting spurious detection induced, for example, by condensation, ingress of water, or thermal drift, based on the time variations of a capacity seen by the readout circuit (), Additionally, the proximity sensor may integrate signals form motion sensors, temperature sensors or other sensors, to discriminate spurious proximity signals.