Abstract: A dual user interface trackpad that utilize capacitive sensing to detect user proximity and/or touch and inductive sensing to detect stylus input, allowing a user to select specific content or a window on an associated display with touch, to reposition and manipulate the selected content or window with touch to facilitate more convenient entry of additional content amongst the selected content or window using the stylus, and to indicate completion of the entry of content with another touch and/or proximity event on or near the trackpad.

Abstract: A trackpad for a dual user interface has capacitive sensing and inductive sensing capabilities, charge transfer measurement circuitry, a set of a plurality of sensing electrode structures, a set of a plurality of inductive receiving coils and at least one inductive transmit coil. The set of sensing electrode structures is used with the charge transfer measurement circuitry for capacitive sensing and the capacitive sensing is used to discern user input via finger proximity or touch. The set of inductive receiving coils is used with the charge transfer measurement circuitry for inductive sensing and the inductive sensing is used to discern user input via a stylus.