US 2014/0368915 A1 · OPTICAL IMAGE STABILIZER WITH IMPROVED MAGNETIC SENSITIVITY

Abstract

The present invention provides a lens driving device that is based on a Voice Coil Actuator (VCA) structure and provides the auto-focusing and optical image stabilization (OIS) functions. According to the present invention, these two functions can be realized by a common magnet scheme, or a separate magnet scheme. Besides, the present invention also provides an improved structure for the lens driving device to enhance the function of OIS thereof. By arranging a magnetic enhancement device below the OIS coils in the lens driving device, the magnetic driving force of the OIS coils and magnetic induction of the Hall sensors, if present, can be enhanced, and the magnetic sensitivity thereof may be also improved.

Claims16

Dependent claims

A lens driving device, comprising:

a lens assembly having an optical axis;
an auto-focusing (AF) coil disposed around an outer surrounding of said lens assembly with respect to said optical axis;
a set of optical image stabilization (OIS) coils disposed on a plane having a normal direction perpendicular to said optical axis;
a plurality of magnets arranged above said set of OIS coils in such a way that each of said magnets has a first surface facing said AF coil and a second surface facing said OIS coils;
and
a magnetic enhancement device disposed under said set of OIS coils.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/305,666Filed 16 Jun 2014

Priority

17 Jun 2013

Published

18 Dec 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G02B 27/646
Imaging systems using optical elements for stabilisation of the lateral and angular position of the image: compensating for small deviations, e.g.…
G02B 7/08
With mechanism for focusing or varying magnification: adapted to co-operate with a remote control mechanism
G02B 7/09
With mechanism for focusing or varying magnification: adapted for automatic focusing or varying magnification
G03B 2205/0007
Adjustment of optical system relative to image or object surface other than for focusing: movement of one or more optical elements for control of…

Optical image stabilizer with improved magnetic sensitivity

Life of this patent

Optical image stabilizer with improved magnetic sensitivity

Life of this patent

Abstract

Claims16