Systems and methods for determining the location and pressure of a touchload applied to a touchpad
First Claim
1. A multi-touch interface comprising:
- a two-dimensional array of contact points, wherein the contact points are substantially uniformly distributed within the array such that each contact point is substantially equidistant from neighboring contact points located in vertical and horizontal directions;
wherein a first subset of contact points are electrically connected to form at least one first type of sensor, each first type of sensor comprising contact points electrically connected in a first direction;
wherein a second subset of contact points are electrically connected to form at least one second type of sensor, each second type of sensor comprising contact points electrically connected in a second direction, wherein the second subset of contact points comprise contact points other than the first subset of contact points, and wherein the second direction is orthogonal to the first direction; and
wherein a third subset of contact points is divided into clusters of substantially locally distributed contact points, each of the clusters comprising contact points electrically connected to form a third type of sensor;
wherein the third subset of contact points comprises contact points other than the first and second subset of contact points; and
wherein each of the clusters is formed to provide an absolute location of one or more touch loads applied to the multi-touch interface.
5 Assignments
0 Petitions
Accused Products
Abstract
A computing device with a multi-touch touch interface having a plurality of rows of contact points and a plurality of columns of contact points. For each other row of contact points, every contact point in the row is connected to form a row sensor. For each other column of contact points, every contact point in the column that is not part of a row sensor is connected to form a column sensor. The contact points that are not part of a row sensor and not part of a column sensor are connected together to form at least one shape sensor. A computing device with a multi-touch touch interface having a plurality of contact points has at least one layer of piezoresistive material, an insulating structure disposed between the plurality of contact points and the piezoresistive material, and a gap between the plurality of contact points and piezoresistive material. A method of providing multi-layered password recognition for a computing device having a touch interface first provides a passcode associated with an alphanumeric symbol to the computing device. The alphanumeric symbol is associated with a passcode pressure level. A touch load is applied to the touch interface and a measured pressure level associated with the applied touch load is determined. Then it is determined whether the measured pressure level corresponds to the passcode pressure level associated with the alphanumeric symbol of the passcode.
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Citations
19 Claims
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1. A multi-touch interface comprising:
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a two-dimensional array of contact points, wherein the contact points are substantially uniformly distributed within the array such that each contact point is substantially equidistant from neighboring contact points located in vertical and horizontal directions; wherein a first subset of contact points are electrically connected to form at least one first type of sensor, each first type of sensor comprising contact points electrically connected in a first direction; wherein a second subset of contact points are electrically connected to form at least one second type of sensor, each second type of sensor comprising contact points electrically connected in a second direction, wherein the second subset of contact points comprise contact points other than the first subset of contact points, and wherein the second direction is orthogonal to the first direction; and wherein a third subset of contact points is divided into clusters of substantially locally distributed contact points, each of the clusters comprising contact points electrically connected to form a third type of sensor; wherein the third subset of contact points comprises contact points other than the first and second subset of contact points; and wherein each of the clusters is formed to provide an absolute location of one or more touch loads applied to the multi-touch interface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A multi-touch sensor mechanism comprising:
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a two-dimensional array of contact points, wherein the contact points are substantially uniformly distributed within the array such that each contact point is substantially equidistant from neighboring contact points located in vertical and horizontal directions; at least one conductive electrode pad corresponding to each contact point in the array; a reference connection for providing connection to a reference signal; and at least one circuit configured to provide an electrical measurement between each conductive electrode pad and the at least one reference connection when a touch event occurs; wherein a first subset of contact points are electrically connected to form at least one first type of sensor, each first type of sensor comprising contact points electrically connected in a first direction; wherein a second subset of contact points are electrically connected to form at least one second type of sensor, each second type of sensor comprising contact points electrically connected in a second direction, wherein the second subset of contact points comprise contact points other than the first subset of contact points, and wherein the second direction is orthogonal to the first direction; and wherein a third subset of contact points is divided into clusters of substantially locally distributed contact points, each of the clusters comprising contact points electrically connected to form a third type of sensor; wherein the third subset of contact points comprises contact points other than the first and second subset of contact points; and wherein each of the clusters is formed to provide an absolute location of one or more touch loads applied to the multi-touch interface. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of constructing a layout of contact points for a multi-touch interface, the method comprising:
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providing a two-dimensional array of plurality of rows of contact points, wherein the contact points are substantially uniformly distributed within the array such that each contact point is substantially equidistant from neighboring contact points in vertical and horizontal directions; electrically connecting a first subset of contact points to form at least one first type of sensor, each first type of sensor comprising contact points electrically connected in a first direction; electrically connecting a second subset of contact points to form at least one second type of sensor, each second type of sensor comprising contact points electrically connected in a second direction; wherein the second subset of contact points comprise contact points other than the first subset of contact points; and wherein the second direction is orthogonal to the first direction; dividing a third subset of contact points, the third subset comprising contact points other than the first and second subset of contact points, into clusters of substantially locally distributed contact points; and electrically connecting contact points within each of the clusters to form a third type of sensor, wherein each cluster is formed to provide an absolute location of one or more touch loads applied to the multi-touch interface. - View Dependent Claims (18, 19)
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Specification