Force sensor substrate
First Claim
1. An input device, comprising:
- a display comprising a first substrate mounted to a housing, the first substrate defining a touch surface extending along first and second dimensions;
a second substrate disposed within the housing on a side of the first substrate opposite the touch surface, the second substrate comprising;
a first sensor electrode disposed along a periphery of the touch surface in the first and second dimensions; and
a second sensor electrode disposed along the periphery of the touch surface and at least partly circumscribing the first sensor electrode in the first and second dimensions, wherein the first sensor electrode and the second sensor electrode spatially overlap an active area of the display; and
a processing system configured to perform capacitive sensing using the first and second sensor electrodes to determine a deflection of the first substrate relative to the housing in response to force applied to the touch surface.
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Accused Products
Abstract
A force-sensitive input device and related method and processing system are disclosed. The input device comprises a first substrate mounted to a housing and defining a touch surface extending along first and second dimensions. The input device further comprises a second substrate disposed within the housing on a side of the first substrate opposite the touch surface. The second substrate comprises a first sensor electrode disposed along a periphery of the touch surface in the first and second dimensions, and a second sensor electrode disposed along the periphery of the touch surface and at least partly circumscribing the first sensor electrode in the first and second dimensions. The input device further comprises a processing system configured to perform capacitive sensing using the first and second sensor electrodes to determine a deflection of the first substrate relative to the housing in response to force applied to the touch surface.
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Citations
21 Claims
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1. An input device, comprising:
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a display comprising a first substrate mounted to a housing, the first substrate defining a touch surface extending along first and second dimensions; a second substrate disposed within the housing on a side of the first substrate opposite the touch surface, the second substrate comprising; a first sensor electrode disposed along a periphery of the touch surface in the first and second dimensions; and a second sensor electrode disposed along the periphery of the touch surface and at least partly circumscribing the first sensor electrode in the first and second dimensions, wherein the first sensor electrode and the second sensor electrode spatially overlap an active area of the display; and a processing system configured to perform capacitive sensing using the first and second sensor electrodes to determine a deflection of the first substrate relative to the housing in response to force applied to the touch surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a force-sensitive input device comprising a substrate disposed on a non-viewing side of a display, the display mounted to a housing and having a first surface extending along first and second dimensions, the method comprising:
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driving, during a first time period, a first sensor electrode of the substrate with a first sensing signal, the first sensor electrode disposed along a periphery of the first surface in the first and second dimensions; driving, during the first time period, a second sensor electrode of the substrate with a guard signal, the second sensor electrode disposed along the periphery of the first surface and at least partly circumscribing the first sensor electrode in the first and second dimensions, wherein the first sensor electrode and the second sensor electrode spatially overlap an active area of the display; receiving, using the first sensor electrode, a first resulting signal comprising effects of the driven first sensing signal and effects of a first deflection of the display relative to the housing; determining, based on the received first resulting signal, a first force applied to the first surface; and performing, using the display, a first user interface action based on the first force. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A processing system for a force-sensitive input device comprising a substrate disposed on a non-viewing side of a display, the display mounted to a housing and having a first surface extending along first and second dimensions, the processing system comprising:
first circuitry communicatively coupled with first and second sensor electrodes of the substrate, wherein the first circuitry is configured to; drive, during a first time period, the first sensor electrode with a first sensing signal, the first sensor electrode disposed along a periphery of the first surface in the first and second dimensions; drive, during the first time period, the second sensor electrode with a guard signal, the second sensor electrode disposed along the periphery of the first surface and at least partly circumscribing the first sensor electrode in the first and second dimensions, wherein the first sensor electrode and the second sensor electrode spatially overlap an active area of the display; receive, using the first sensor electrode, a first resulting signal comprising effects of the driven first sensing signal and effects of a first deflection of the display relative to the housing; determine, based on the received first resulting signal, a first force applied to the first surface; and perform, using the display, a first user interface action based on the first force. - View Dependent Claims (16, 17, 18, 19, 20, 21)
Specification