Bi-directional stiffness for optical image stabilization in a dual-aperture digital camera
First Claim
Patent Images
1. A folded camera module, comprising:
- a) a lens module having a lens optical axis,b) an optical path folding element (OPFE) for folding light from a first optical path to a second optical path towards an image sensor, the second optical path being along the lens optical axis;
c) a lens actuation sub-assembly configured to actuate the lens module to be moved for auto-focus (AF) along a first direction substantially parallel to the second optical path and to be moved for optical image stabilization (OIS) along a second direction substantially orthogonal to both the first and second optical paths to compensate for tilt of the folded camera module around the first direction; and
d) an OPFE actuation sub-assembly configured to tilt the OPFE for OIS around an OPFE tilt axis which is parallel to the second direction to compensate for tilt of the folded camera module around the second direction,wherein the lens actuation sub-assembly comprises a plurality of springs mechanically coupled to a lens support plate carrying the lens module, wherein the plurality of springs provides overall low stiffness to movement of the lens module in the first and second directions and high stiffness of the lens module to torsion, such that a ratio between natural frequencies arising from the high stiffness to torsion and the low stiffness to movement in each of the first and second directions is greater than 2.
1 Assignment
0 Petitions
Accused Products
Abstract
Mechanisms for providing optical image stabilization in at least one direction as well as auto-focus in a digital camera comprise a plurality of springs mechanically coupled to at least a lens module carrying a lens of the digital camera, wherein the plurality of springs provides overall low stiffness to movement of the lens in two, first and second directions orthogonal to each other, and provides high stiffness to torsion of the lens module.
-
Citations
15 Claims
-
1. A folded camera module, comprising:
-
a) a lens module having a lens optical axis, b) an optical path folding element (OPFE) for folding light from a first optical path to a second optical path towards an image sensor, the second optical path being along the lens optical axis; c) a lens actuation sub-assembly configured to actuate the lens module to be moved for auto-focus (AF) along a first direction substantially parallel to the second optical path and to be moved for optical image stabilization (OIS) along a second direction substantially orthogonal to both the first and second optical paths to compensate for tilt of the folded camera module around the first direction; and d) an OPFE actuation sub-assembly configured to tilt the OPFE for OIS around an OPFE tilt axis which is parallel to the second direction to compensate for tilt of the folded camera module around the second direction, wherein the lens actuation sub-assembly comprises a plurality of springs mechanically coupled to a lens support plate carrying the lens module, wherein the plurality of springs provides overall low stiffness to movement of the lens module in the first and second directions and high stiffness of the lens module to torsion, such that a ratio between natural frequencies arising from the high stiffness to torsion and the low stiffness to movement in each of the first and second directions is greater than 2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification