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1. (WO2018128912) POSITION, TILT, AND TWIST DETECTION FOR STYLUS

Pub. No.:    WO/2018/128912    International Application No.:    PCT/US2017/068847
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sat Dec 30 00:59:59 CET 2017
IPC: G06F 3/044
G06F 3/0354
Applicants: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventors: CASE, Charles Whipple Jr.
WESTHUES, Jonathan
QIAO, Tianzhu
Title: POSITION, TILT, AND TWIST DETECTION FOR STYLUS
Abstract:
A touch-sensitive display device includes a touch sensor having a plurality of display electrodes and control logic coupled to the plurality of display electrodes. The control logic is configured to receive, for each of a plurality of stylus electrodes of an active stylus interacting with the touch-sensitive display device, a spatial capacitance measurement over the touch sensor for that stylus electrode. Relative to the touch sensor, and based on spatial capacitance measurements of the stylus electrodes, the control logic is configured to determine (i) a tip position of the active stylus, (ii) a tilt parameter of the active stylus, and (iii) a twist parameter of the active stylus.