Method of measuring capacitance of row and column electrodes of capacitive imaging device
US10436733B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2017 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Apr 2, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04111
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive imaging method or device using an array of row electrodes 101 and column electrodes 102 on a substrate 100, wherein cross-capacitance between row and column electrodes is obtained from row electrode 101 self-capacitance measured with the remaining electrodes grounded, column electrode 102 self-capacitance measured with the remaining electrodes grounded, and combined row and column electrode self-capacitance measured with the remaining electrodes grounded. A preferred embodiment is a hand-held wall scanner for detecting hidden features having a two-dimensional display the size of the array and located over it. Hidden features influencing row-to-column cross-capacitances are thus imaged in real size and at their real location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.