Capacitance sensing circuits, methods and systems having conductive touch surface

摘要

A capacitance sense device can include a plurality of sense electrodes; a nonconductive structure comprising first regions formed over the sense electrodes and second regions formed between first regions that are less compressible than the first regions; a conductive touch surface formed over the nonconductive structure; and a capacitance sense circuit coupled to at least the sense electrodes.

主权项

1. A capacitance sense device, comprising:
a plurality of sense electrodes; a conductive touch surface configured to receive direct contact by a conductive object; a nonconductive structure comprising first nonconductive regions formed between the conductive touch surface and each of the plurality of sense electrodes, and second nonconductive regions that are less compressible than the first nonconductive regions, each of the second nonconductive regions formed adjacent to at least one of the first nonconductive regions, wherein the conductive touch surface overlies both of the first nonconductive regions and the second nonconductive regions so that a portion of the conductive touch surface overlying the first nonconductive regions is capable of being displaced in response to the direct contact; and a capacitance sense circuit coupled to at least the sense electrodes, the capacitance responsive to the direct contact by the conductive object.