Integrated communication and capacitive sensing circuit and interactive system using the same
US10402024B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2017 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jun 2, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H2200/00
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An integrated communication and capacitive sensing circuit and an interactive system using the same are provided in the present invention. The integrated communication and capacitive sensing circuit includes a microprocessor, a sensing electrode and a resonant circuit. The microprocessor includes a first input/output (I/O) pin and a second I/O pin. The sensing electrode is coupled to the first I/O pin of the microprocessor. The input terminal of the resonant circuit is coupled to the second I/O pin of the microprocessor, and the output terminal of the resonant circuit is coupled to the sensing electrode. When sensing the capacitance is performed, the first I/O pin of the microprocessor detects the charging/discharging state of the sensing electrode to determine the capacitive variation. When a data output is performed, the first I/O pin of the microprocessor is set to high impedance, and the second I/O pin of the microprocessor outputs or does not output a high frequency carrier according to a transmission data, wherein the resonant circuit amplifies the amplitude of the high frequency carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.