Circular touch sensor
US7786981B2 · kind B2 · utility
50Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Nov 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0416
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circular touch sensor has three or more sensors arranged in an iris pattern. Each pad is defined by continuous edges that spiral outward about a center point. The unique geometric shape allows measurement of relative amounts of contact on adjoining sensors. In one implementation, the sensors measure relative capacitance of two or more sensors, thereby enabling high precision identification of the point of contact. With as few as three pads, the circular touch sensor is less expensive than traditional 12-pad to 16-pad circular sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.