Capacitive sensor packaging

摘要

An apparatus comprises a fingerprint sensor having a set of capacitive elements configured for capacitively coupling to a user fingerprint. The fingerprint sensor may be disposed under a control button or display element of an electronic device, for example one or more of a control button and a display component. A responsive element is responsive to proximity of the user fingerprint, for example one or both of a first circuit responsive to motion of the control button, and a second circuit responsive to a coupling between the fingerprint and a surface of the display element. The fingerprint sensor is disposed closer to the fingerprint than the responsive element. The control button or display component may include an anisotropic dielectric material, for example sapphire.

主权项

1. A fingerprint sensor apparatus comprising:
a fingerprint sensor disposed beneath a device component comprising a control or display element formed of an anisotropic dielectric material, the fingerprint sensor configured for capacitive coupling to a fingerprint of a user finger; and a control circuit element disposed with respect to the device component, the control circuit element responsive to proximity of the user finger via capacitive or mechanical coupling to the control or display element; wherein the fingerprint sensor is disposed in a proximal position with respect to the control or display element and the control circuit element is disposed in a distal position with respect to the control or display element and the fingerprint sensor.