Lens driving mechanism, lens unit and image pickup device
Patent 7409150 Issued on August 5, 2008. Estimated Expiration Date: 
March 21, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 21, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesImaging apparatus, and method and device for shake correction in imaging apparatus Patent #: 6940542 InventorAssigneeApplicationNo. 11384255 filed on 03/21/2006US Classes:396/55, Having stabilization system359/824, Electromagnetic or piezoelectric drive348/208.4, Motion correction348/208.5, Including both electrical and mechanical correcting devices348/208.7, Mechanical348/208.99Camera image stabilizationExaminersPrimary: Leaynh, BotAttorney, Agent or FirmForeign Patent References
International ClassesG03B 17/00H04N 5/232 AbstractDisclosed herein is a lens driving mechanism which can achieve simplification of the mechanism and provision of appropriate control relating to a correction against a shake. The lens driving mechanism includes a piezoelectric element that is deformed when energized for applying driving force to the movable block and a charge amount sensor for detecting the amount of charge accumulated in the piezoelectric element. The amount of electric current to be supplied to the piezoelectric element is determined based on the external force, acting upon the movable block, which is estimated based on the difference between the amount of charge injected into or discharged from the piezoelectric element and the amount of charge accumulated in the piezoelectric element and detected by the charge amount sensor when the movable block is moved in the direction perpendicular to the optical axis.Field of SearchAdjustableWith axial adjustment (e.g., adjustable focus, etc.) Electromagnetic or piezoelectric drive IMAGE STABILIZATION Electrical motion detection Mechanical motion detection (gyros, accelerometers, etc.) Differentiating unintentional from purposeful camera movement (pan, tilt) Motion correction Including both electrical and mechanical correcting devices Electrical (memory shifting, electronic zoom, etc.) Motion correction plus resolution enhancement Changing camera function based on motion detection (mode, power supply) Camera image stabilization With oscillation of lens or sensor to optimize error signal With motion detection | |
