Refreshing method of sensing baseline values for capacitive sensor device and capacitive sensor device
US10296139B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jan 23, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Jan 8, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A refreshing method of sensing baseline values for a capacitive sensor device and the capacitive sensor device are applied to confirm whether the differences between the current measured values and the factory or record baseline values are approximately equal, to determine whether to use current measured values as the sensing baseline values used in the following sensing procedure. When the differences are approximately equal, the current measured values are used as the sensing baseline values. When the differences are not approximately equal, the factory baseline values are used as the sensing baseline values, and the correcting procedure of the sensing baseline values of the sensing points is executed. In the correcting procedure, the signal characteristic of the measured value of each sensing point is detected to be high frequency or low frequency, to determine whether to refresh the corresponding sensing baseline values by the current measured values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.