Capacitive sensing device and capacitive sensing method
US10048813B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | May 4, 2015 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Aug 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0426
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive sensing method includes detecting present measured values of plural reference points selected from plural sensing points, generating a present difference value according to the present measured values of the reference points and one or more reference measured values, obtaining a selected adjustment factor according to a relation setting and the present difference value, detecting present measured values of the sensing points, generating plural position signals of the sensing points according to the present difference values of the sensing points, adjusting the position signals according to the selected adjustment factor, and controlling the output of the adjusted position signals according to a reference signal. The sensing points are defined by electrodes intersected with one another and configured to form an array. The reference points are located at the periphery of the array. The relation setting is the relationship between signal difference values and adjustment factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.