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:
Oct. 15, 2013
Filed:
Feb. 17, 2010
Wyatt O. Davis, Bothell, WA (US);
Yunfei MA, Redmond, WA (US);
Dean R. Brown, Lynnwood, WA (US);
Jason B. Tauscher, Sammanish, WA (US);
Wyatt O. Davis, Bothell, WA (US);
Yunfei Ma, Redmond, WA (US);
Dean R. Brown, Lynnwood, WA (US);
Jason B. Tauscher, Sammanish, WA (US);
Microvision, Inc., Redmond, WA (US);
Abstract
Briefly, in accordance with one or more embodiments, a piezoresistive stress sensor comprises a plurality of piezoresistive elements coupled in a bridge circuit disposed on, near, or contiguous to a flexure to detect torsional flexing about an axis of the flexure. The bridge circuit has at least two nodes disposed along the axis of the flexure and at least two nodes disposed off the axis of the flexure to maximize, or nearly maximize, an output of the bridge circuit in response to the torsional flexing of the flexure. A torsional flexing component of the output signal of the bridge circuit is relatively increased with respect to a component of the output signal generated by non-torsional stress of the flexure, or a component of the output signal generated by non-torsional stress of the flexure is reduced with respect to the torsional flexing component of the output signal, or combinations thereof.