Input device based on voltage gradients
US8638112B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2010 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0445
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input device is disclosed, including a first drive electrode comprising a resistive material and a first sense electrode disposed proximate to the first drive electrode. The input device further includes a processing system which is coupled with the first drive electrode and the first sense electrode. In one embodiment, the processing system is configured for electrically driving a first end of the first drive electrode and electrically driving a second end of the first drive electrode to cause a change in a voltage gradient along a length of the first drive electrode. In such an embodiment, the change in the voltage gradient generates a first electrical signal in the first sense electrode. The processing system also acquires a first measurement of the first electrical signal and determines positional information along the length of the first drive electrode based upon the first measurement, wherein the positional information is related to an input object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.