Optical image stabilization
US8436908B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2010 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Nov 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical image stabilization (OIS) system may be used in a camera having an optical system which includes a motion compensating optical element driven by an actuator. The system may include a motion sensor providing a motion signal, a frequency detector for detecting a dominant frequency being that frequency within the motion signal which may produce the most significant motion blurring in the image produced by the camera, and a tunable high-pass filter for filtering the motion signal and supplying the filtered motion signal as an actuator control signal. The tunable high pass filter may be tuned based upon the dominant frequency to a filter characteristic which provides a phase lead substantially canceling a phase lag of the actuator at that frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.