Force sensing touchpad
US5854625A · kind A · utility
366Cited by
108References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Nov 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/04142
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A force sensing touchpad comprises a substantially rigid touch surface; a substantially rigid frame; a plurality of spring structures formed integrally with the touch surface and mechanically connected to the reference frame; and a circuit for deriving force information from capacitances proportional to the distances between predetermined portions of the touch surface and portions of the frame in response to a force applied to the touch surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.