Low pin count solution using capacitance sensing matrix for keyboard architecture
US9019133B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jul 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960755
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for selecting a keyboard key based on a position of a presence of a conductive object on a sensing device and a pre-defined area of the keyboard key. The apparatus may include a sensing device and a processing device. The sensing device may include a plurality of sensor elements to detect a presence of a conductive object on the sensing device. Multiple keyboard keys are assigned to pre-defined areas of the sensing device. The processing device is coupled to the sensing device using capacitance sensing pins, and may be operable to determine a position of the presence of the conductive object, and to select a keyboard key based on the position of the conductive object and the pre-defined areas of the sensing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.