Locking active stylus and touch-sensor device
US9690431B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2011 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Feb 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a system comprises a touch sensor and a stylus. The touch sensor comprises drive lines and sense lines arranged such that intersections of the drive lines and sense lines form capacitive nodes. The drive lines transmits a first signal having an identification portion. The stylus comprises a sense unit and a drive unit. The sense unit senses the first signal from the drive lines, compares the identification portion to criteria stored in the stylus, and authorizes the drive unit to transmit a second signal based on the first signal if the identification portion satisfies the criteria stored in the stylus. The drive unit transmits the second signal to the sense lines such that transmission of the second signal changes capacitance of the capacitive nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.