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:
Jul. 14, 2015
Filed:
Dec. 10, 2012
Research IN Motion Limited, Waterloo, CA;
Cornel Mercea, Waterloo, CA;
Peter Mankowski, Waterloo, CA;
James Alexander Robinson, Elmira, CA;
Jacek S. Idzik, Kenilworth, CA;
BlackBerry Limited, Waterloo, Ontario, CA;
Abstract
An active stylus having a control circuit configured to wake up the stylus from a sleep mode to an active mode in response to pressure applied to a tip of the stylus. The stylus includes a force sensor electrically coupled to a power source, an operational amplifier, and a voltage level comparator, the voltage level comparator configured to output a digital wake up interrupt signal when pressure is applied to the tip when the control circuit is in the sleep mode. The operational amplifier is configured to provide an analog signal representative of varying pressure on the tip. This signal is processed by the control circuit such that the stylus goes into the sleep mode after a specified period of time following cessation of variations in the analog signal.