| US 7,454,977 B2 | ||
| Force measuring systems for digital pens and other products | ||
| Glen C. Larsen, Issaquah, Wash. (US); Krishna Darbha, Bothell, Wash. (US); and Michael W. Baseflug, Duvall, Wash. (US) | ||
| Assigned to Microsoft Corporation, Redmond, Wash. (US) | ||
| Filed on Feb. 15, 2005, as Appl. No. 11/57,371. | ||
| Prior Publication US 2006/0181525 A1, Aug. 17, 2006 | ||
| Int. Cl. G01B 7/16 (2006.01); G01F 25/00 (2006.01); G01L 1/00 (2006.01) | ||
| U.S. Cl. 73—763 | 20 Claims |
| 1. A digital pen, comprising:
a body member having a longitudinal direction;
a writing force sensor including a substrate arranged at least partially within the body member, wherein the substrate includes
at least one pattern of electrically conductive material on a first major surface thereof, wherein the first major surface
extends in substantially the longitudinal direction;
a writing surface contacting member mounted at least partially within the body member;
means for changing a direction or location of application of a force transmitted via the writing surface contacting member
in response to contact with a writing surface from a force applied in a first direction or location to a force delivered in
a second direction, or location; and
means for changing an electrical conductivity property associated with the pattern of electrically conductive material on
the substrate based on the force with which the writing surface contacting member contacts the writing surface, wherein the
means for changing the electrical conductivity property is responsive to the force delivered in the second direction or location.
|