Method for optimizing the detection of the contact point of tactile capacitance surface
US6404353B1 · kind B1 · utility
8Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/962
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A process for detecting the point of touching of a tactile surface. A high frequency signal is sequentially supplied to four corners of a plate having a capacitive surface. This is accomplished by supplying one diagonal with the others being idle. The output voltages are measured at the four corners for all the various possible positions of touching. Relations between voltages are established from these measurements obtained for each diagonal. During touching, the relations obtained are compared with those stored in order to locate the point of touching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.