Invention Grant
- Patent Title: Capacitive force sensor with magnetic spring
- Patent Title (中): 带弹簧的电容力传感器
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Application No.: US13713278Application Date: 2012-12-13
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Publication No.: US08978487B2Publication Date: 2015-03-17
- Inventor: Andrew Ashraf Fergusson , Iouri Petrovitch Besperstov
- Applicant: Research in Motion Limited
- Applicant Address: CA Waterloo
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: CA Waterloo
- Agency: Leveque Intellectual Property Law, P.C.
- Main IPC: G01L1/00
- IPC: G01L1/00 ; G06F3/033 ; G01L1/14 ; G06F3/0354

Abstract:
The present disclosure provides a method and apparatus for a capacitive force sensor utilizing a magnetic spring. The force is applied across a body and a moveable element that are coupled by the magnetic spring. The moveable element is configured to vary the capacitance of a variable capacitor. A sensing circuit, electrically coupled to the variable capacitor, provides a force signal characteristic of the applied force. In application to a stylus pointing device, the moveable element is coupled to a moveable tip of the stylus. The force signal, which is characteristic of the force applied to the tip of the stylus, may be used to control an application executed on a host electronic device.
Public/Granted literature
- US20140165742A1 CAPACITIVE FORCE SENSOR WITH MAGNETIC SPRING Public/Granted day:2014-06-19
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