Device and method for localized force sensing
First Claim
1. An electronic system comprising a capacitive touch screen input device, the capacitive touch screen input device comprising:
- a pliable component comprising an input surface configured to be touched by a user, a first array of sensor electrodes, and a second array of sensor electrodes, the pliable component characterized by a bending stiffness;
a third array of sensor electrodes;
a spacing layer disposed between the third array of sensor electrodes and the pliable component, the spacing layer characterized by a compressive stiffness; and
a display;
wherein in response to a force applied to the input surface by the user, the input surface is configured to deform and the pliable component is configured to deflect at least one of the second array of sensor electrodes towards the third array of sensor electrodes; and
wherein the deformation of the input surface and the deflection of the second array of sensor electrodes is based on the bending stiffness of the pliable component and the compressive stiffness of the spacing layer.
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Accused Products
Abstract
A device and method for operating a capacitive touch screen input device configured to sense input objects and their applied force in a sensing region, the device including a pliable component having an input surface and characterized by a bending stiffness, and first and second arrays of sensor electrodes. The input device further includes a third array of sensor electrodes and a spacing layer disposed between the third array. The pliable component is characterized by a compressive stiffness and configured to deform in response to a force applied to the input surface and to deflect the second array of sensor electrodes towards the third array of sensor electrodes, wherein the deformation of the input surface and the deflection of the second array of sensor electrodes is a function of the ratio of the bending stiffness of the pliable component and the compressive stiffness of the spacing layer.
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Citations
21 Claims
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1. An electronic system comprising a capacitive touch screen input device, the capacitive touch screen input device comprising:
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a pliable component comprising an input surface configured to be touched by a user, a first array of sensor electrodes, and a second array of sensor electrodes, the pliable component characterized by a bending stiffness; a third array of sensor electrodes; a spacing layer disposed between the third array of sensor electrodes and the pliable component, the spacing layer characterized by a compressive stiffness; and a display; wherein in response to a force applied to the input surface by the user, the input surface is configured to deform and the pliable component is configured to deflect at least one of the second array of sensor electrodes towards the third array of sensor electrodes; and wherein the deformation of the input surface and the deflection of the second array of sensor electrodes is based on the bending stiffness of the pliable component and the compressive stiffness of the spacing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A processing system for a capacitive input device, the capacitive input device comprising a pliable component having an input surface configured to be touched by a user and a first and second array of sensor electrodes, the pliable component disposed above a spacing layer, and the spacing layer disposed above a third array of sensor electrodes;
- the processing system communicatively coupled to the first, second, and third arrays of sensor electrodes and configured to;
operate the first, second and third array of sensor electrodes to determine a first type of resulting signal and a second type of resulting signal and determine positional information and force information based on the first and second types of resulting signals, wherein; the first type of resulting signal corresponds to effects of the input object in contact with an input surface, and the second type of resulting signal corresponding to effects due to deflection of the input surface due to the input object in contact with the input surface. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
- the processing system communicatively coupled to the first, second, and third arrays of sensor electrodes and configured to;
Specification