Capacitive touchscreen or touchpad for finger and active stylus
US8278571B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2009 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Nov 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0448
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is provided an electronic device having a mutual capacitance touchscreen or touchpad having combined finger navigation and active stylus navigation and character entry capabilities. According to one such embodiment, first and second pluralities of sense and drive electrodes are disposed in or on at least one substrate, and form an array configured to permit a first location corresponding to a finger or a second location corresponding to an active stylus to be detected thereby. The drive electrodes in the array are configured to operate as drive electrodes when the touchscreen or touchpad operates in a first finger touch mode, and to operate as additional sense electrodes when the touchscreen or touchpad operates in a second active stylus mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.