Multi-touch sensor and electrostatic pen digitizing system utilizing simultaneous functions for improved performance
US10120498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2016 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Jun 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Circuitry, systems, and methods are provided that can acquire touch sensor data simultaneously for different modes of, for example, self, mutual, and pen, and with simultaneous sampling of the different channels. Drive/receive circuitry and methods of driving and receiving sensor electrode signals are provided that allow digital I/O pins to be used to interface with touch sensor electrodes using external passive filter components. Drive/receive circuitry is provided employing voltage following sigma-delta A/D coverts that are adapted to both drive and sense touch sensor signals on multiple frequencies simultaneously. This circuitry may be operated in modes to sense various combinations of mutual, self, and pen touch signals simultaneously. While capacitive multi-touch sensors are preferred, the circuits and methods herein are useful with many other types of touch sensors as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.