Continuous capacitance measurement for MEMS-actuated movement of an optical component within an auto-focus camera module
US9097748B2 · kind B2 · utility
3Cited by
2References
19Claims
0Family size
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Key dates
| Filing date | Jul 20, 2013 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Aug 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2205/0084
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A MEMS-actuated autofocus camera module configured for continuous capacitance measurement includes a bridge balance detector coupled to a MEMS actuator driver. The MEMS actuated autofocus camera module is configured to permit online MEMS actuator capacitance measurements to automatically focus images of objects disposed at arbitrary distances from autofocus camera module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.