Fast multi-touch sensor
US10444915B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2017 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | May 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A low-latency touch sensor is disclosed for use in connection with a touch surface having first and second conductors sensitive to changes in coupling therebetween as a result of touch (and/or near-touch). A signal generator generates unique orthogonal signals, a transmitter transmits the orthogonal signals on each of the first conductors. Receivers connected to the second conductors receive signals during a measurement period. The signals measured during the measurement period are processed to determine, for each measurement period, and for each of the second conductors, a signal strength corresponding to each of the unique orthogonal signals. The signal strengths can be used as a basis to determine touch events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.