Rotatable crown for an electronic device
US10551798B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2017 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Oct 30, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compact crown for an electronic device such as an electronic watch, including a set of wipers capable of determining a rotation angle, rotation direction, or rotation speed, is disclosed. The set of wipers is in contact with at least one resistance member at different angular positions around a rotation axis. The crown may have a group of ground taps disposed along the resistance member and a measured signal may vary based on the position of each wiper as it contacts the at least one resistance member. A compact crown may also include capacitive members and capacitive sensors in order to similarly determine rotation angle, rotation direction, or rotation speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.