Modulating drive signal for communication between active stylus and touch-sensor device
US9280218B2 · kind B2 · utility
0Cited by
12References
21Claims
0Family size
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Key dates
| Filing date | Dec 22, 2011 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Feb 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, an apparatus comprises a sense unit and a drive unit. The sense unit is operable to sense a first signal from drive lines of a touch sensor. The touch sensor comprises the drive lines and sense lines arranged relative to the drive lines such that intersections of the drive lines and the sense lines form one or more capacitive nodes. The drive unit is operable to transmit a second signal based on the first signal to the sense lines such that transmission of the second signal changes the perceived capacitance of the one or more capacitive nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.