Tangential force control in a touch location device
First Claim
1. A force sensing touch location device for sensing a touch force applied to a touch surface, the touch force including a perpendicular component that is perpendicular to a surface of accuracy of the touch device and a tangential component that is tangential to said surface of accuracy, the force sensing touch location device comprising:
- a plurality of force sensors that develop signals in response to application of the touch force to the touch surface; and
a first mechanical path to transmit the majority of the tangential component of the touch force, wherein the first path does not include the plurality of force sensors, and wherein the first path comprises a plurality of shunt connections coupled to the touch surface, the plurality of shunt connections comprising lateral stiffening means for impeding lateral motion of the touch surface.
1 Assignment
0 Petitions
Accused Products
Abstract
Various techniques are provided for reducing the impact of tangential forces on touch location in a touch location device. For example, in one aspect, shunt connections are provided that impede lateral motion of the touch surface structure at the level of the touch plane, thereby reducing to insignificant magnitude reactions to tangential force passing through the sensing connections. In another aspect, sensing connections incorporate elastic means so adjusted as to turn that connection'"'"'s reaction to tangential touch force perpendicular to its axis of sensitivity. In another aspect, sensing connections incorporate sensing means so adjusted as to turn that connection'"'"'s axis of sensitivity perpendicular to its reaction to tangential force.
93 Citations
44 Claims
-
1. A force sensing touch location device for sensing a touch force applied to a touch surface, the touch force including a perpendicular component that is perpendicular to a surface of accuracy of the touch device and a tangential component that is tangential to said surface of accuracy, the force sensing touch location device comprising:
-
a plurality of force sensors that develop signals in response to application of the touch force to the touch surface; and a first mechanical path to transmit the majority of the tangential component of the touch force, wherein the first path does not include the plurality of force sensors, and wherein the first path comprises a plurality of shunt connections coupled to the touch surface, the plurality of shunt connections comprising lateral stiffening means for impeding lateral motion of the touch surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A force sensing touch location device for sensing a touch force applied to a touch surface, the force sensing touch location device comprising:
-
a plurality of force sensors that develop signals in response to application of the touch force to the touch surface; and a first mechanical path comprising a plurality of shunt connections coupled to the touch surface to transmit the majority of the touch force, wherein the first path does not include the plurality of force sensors, wherein the plurality of shunt connections comprise lateral stiffening means for impeding lateral motion of the touch surface. - View Dependent Claims (24, 25, 26, 27)
-
-
28. A force sensing touch location device for sensing a touch force applied to a touch surface, the touch force including a perpendicular component that is perpendicular to a surface of accuracy of the touch device and a tangential component that is tangential to said surface of accuracy, the force sensing touch location device comprising:
-
a plurality of sensors that develop signals in response to application of the touch force to the touch surface; at least one sensing connection coupled between the plurality of sensors and the touch surface, the at least one sensing connection developing a corresponding reaction force to the tangential component of the touch force, the at least one sensing connection having an axis at sensitivity that is substantially perpendicular to the corresponding reaction force and oblique with respect to a normal to the touch surface; and a plurality of elastic means, coupled between the touch surface and at least one connecting surface, for positioning the elastic center of the at least one sensing connection substantially within the surface of accuracy. - View Dependent Claims (29, 30, 31, 32, 33, 34)
-
-
35. A force sensing touch location device for sensing a touch force applied to a touch surface, the touch force including a perpendicular component that is perpendicular to a surface of accuracy of the touch device and a tangential component that is tangential to said surface of accuracy, the force sensing touch location device comprising:
-
a plurality of sensors that develop signals in response to application of the touch force to the touch surface; at least one sensing connection coupled between the plurality of sensors and the touch surface, the at least one sensing connection developing a corresponding reaction force to the tangential component of the touch force, the at least one sensing connection having an axis of sensitivity that is substantially perpendicular to the corresponding reaction force; a plurality of elastic means, coupled between the touch surface and at least one connecting surface, the plurality of elastic means including components that are oblique with respect to the surface of accuracy, whereby the elastic center of the at least one sensing connection is positioned substantially within the surface of accuracy. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
-
Specification