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1. (WO2018160440) DETECTION METHOD FOR A DIGITIZER

Pub. No.:    WO/2018/160440    International Application No.:    PCT/US2018/019306
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Sat Feb 24 00:59:59 CET 2018
IPC: G06F 3/041
G06F 3/044
Applicants: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventors: IMANILOV, Benjamin
Title: DETECTION METHOD FOR A DIGITIZER
Abstract:
A method includes transmitting (410) a Continuous Wave Frequency Modulated (CWFM) signal on a first drive line of a grid based capacitive sensor and transmitting the CWFM signal with an imposed delay on a second drive line of grid based capacitive sensor simultaneously with transmission of the CWFM signal on the first drive line. Output on a receive line is correlated (415) with the CWFM signal, Fourier transformation is performed (425) on the correlation of the output and coordinates of an object interacting with the grid based capacitive sensor is identified (430) based on frequency, energy and phase information determined from the Fourier transformation.