Camera module
US11156800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2019 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Oct 14, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0069
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera module includes a lens barrel, a driving coil disposed to face a target detection unit disposed on one side of the lens barrel, a driving device to provide a driving signal to the driving coil, and a position calculating unit including a capacitor, constituting an oscillation circuit together with the driving coil, to calculate a position of the lens barrel from an oscillation signal output by the oscillation circuit. The position calculating unit generates an alternating current (AC) signal according to a comparison result of a peak of the oscillation signal and a reference peak and calculates a position of the lens barrel according to a frequency of the AC signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.