Apple Inc.
Wide dynamic range capacitive sensing

Abstract:

A touch sensor panel configured to detect objects touching the panel as well as objects that are at a varying proximity to the touch sensor panel. The touch sensor panel includes circuitry that can configure the panel in a mutual capacitance (near field) architecture or a self-capacitance (far field and super far field) architecture. The touch sensor panel can operate in different object sensing modes having different resolutions such as a near field mode, a far field mode, and a super-far field mode.