Stylus Tip Shape

摘要

Stylus tip configurations may reduce shadow effect of the stylus tip on capacitance measurements by reducing capacitive coupling between undesired portions of the stylus tip and the capacitive sensing surface. Additionally signal-to-noise ratio (SNR) of a stylus on a plurality of capacitance sensing electrodes may be improved by reducing the self capacitance between the stylus tip and the receive electrodes of a mutual capacitance touch screen.

主权项

1. A stylus tip of a stylus comprising:
a first conductive element disposed substantially at a point of contact between the stylus tip and a capacitive sensing surface, wherein the first conductive element is configured to produce a field distribution having a greater density at locations substantially opposite a tilt direction of the stylus and independent of the axial rotation of the stylus; an elongated second conductive element configured to couple the first conductive element to a body of the stylus, the second conductive element substantially narrower than the first conductive element; and a dielectric material disposed directly around the second conductive element, the dielectric material configured to provide a pen shape to the stylus tip.