Camera module and portable electronic device
US10718992B2 · kind B2 · utility
1Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2019 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Apr 9, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0069
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera module includes a lens barrel, a driving coil disposed to face a target detection unit prepared on one side of the lens barrel, a driving device configured to provide a driving signal to the driving coil, and a position calculating unit including a first capacitor, configured to provide a ground for an alternating current (AC) signal to the driving coil, a second capacitor, connected to the driving coil to constitute oscillation circuit together with the driving coil, and a position calculating circuit configured to calculate a position of the lens barrel from a frequency of the oscillation circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.