Bi-directional stiffness for optical image stabilization in a dual-aperture digital camera
First Claim
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1. A mechanism for providing optical image stabilization (OIS) in a digital camera, comprising:
- a first plurality of springs connected at a lower end to a base and at an upper end to a rigid upper frame, the first plurality of springs enabling the rigid upper frame to move with a first stiffness in a first direction and to move with a second stiffness, higher than the first stiffness, in a second direction orthogonal to the first direction; and
a second plurality of springs connected at an upper end to the rigid upper frame and at the lower end to a rigid body that includes a lens having a lens optical axis, the second plurality of springs enabling the lens to move with a third stiffness in the second direction and to move with a fourth stiffness, higher than the third stiffness, in the first direction,wherein the upper ends and the lower ends of both pluralities of springs define a same direction, wherein the first direction is substantially parallel to the lens optical axis andwherein the mechanism enables lens movement in the first and second directions and reduces rotation about an axis perpendicular to the first and second direction.
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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.
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18 Claims
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1. A mechanism for providing optical image stabilization (OIS) in a digital camera, comprising:
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a first plurality of springs connected at a lower end to a base and at an upper end to a rigid upper frame, the first plurality of springs enabling the rigid upper frame to move with a first stiffness in a first direction and to move with a second stiffness, higher than the first stiffness, in a second direction orthogonal to the first direction; and a second plurality of springs connected at an upper end to the rigid upper frame and at the lower end to a rigid body that includes a lens having a lens optical axis, the second plurality of springs enabling the lens to move with a third stiffness in the second direction and to move with a fourth stiffness, higher than the third stiffness, in the first direction, wherein the upper ends and the lower ends of both pluralities of springs define a same direction, wherein the first direction is substantially parallel to the lens optical axis and wherein the mechanism enables lens movement in the first and second directions and reduces rotation about an axis perpendicular to the first and second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification