Phase shift and phase shift assisted sensing
US11204674B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Jul 6, 2020 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Jul 6, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a phase measurement system and method. Multiple frequency orthogonal signals are transmitted simultaneously along the same row conductor. One of the signals may be low frequency signal. The other signal may be a high frequency signal. The field of the low frequency signal may extend further above a touch surface than the high frequency signal. The phase data from the low frequency signal may be used to provide information about a touch event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.