Camera actuator for lens and sensor shifting
Some embodiments include a camera voice coil motor (VCM) actuator configured to shift a lens and/or an image sensor along multiple axes. The VCM actuator may include a bottom flexure and a top flexure that connect one or more dynamic members to one or more static members. The VCM actuator may include stationary magnets and coils held by dynamic members. In some cases, the VCM actuator may be configured to move the image sensor along an optical axis, to move the image sensor in directions orthogonal to the optical axis, and/or to tilt the image sensor relative to the orthogonal axis. In some examples, the VCM actuator may be configured to move the image sensor in directions orthogonal to the optical axis, to move the lens along the optical axis, and/or to tilt the lens relative to the optical axis.
1. A camera, comprising:
a lens that defines an optical axis;
an image sensor configured to capture light passing through the lens and convert the captured light into image signals;
a voice coil motor (VCM) actuator, comprising:
a magnet; and
a plurality of optical image stabilization (OIS) coils;
a sensor shift platform coupled to the image sensor such that the image sensor is moveable together with the sensor shift platform;
flexures to mechanically connect one or more dynamic components of the camera to one or more static components of the camera, wherein the one or more dynamic components include the sensor shift platform; and
a coil holder coupled with an OIS coil of the plurality of OIS coils, such that the OIS coil is positioned proximate a top side of the magnet;
wherein to move the image sensor in a direction orthogonal to the optical axis, the VCM actuator is configured to cause at least one of the plurality of OIS coils to magnetically interact with the magnet.
2. The camera of claim 1 , wherein:
the OIS coil is a first OIS coil; and
the coil holder is further coupled with a second OIS coil of the plurality of OIS coils, such that the second OIS coil is positioned proximate a bottom side of the magnet.
3. The camera of claim 1 , wherein the VCM actuator further comprises:
an autofocus (AF) coil attached to the coil holder and positioned proximate the magnet;
wherein to move the image sensor in a direction parallel to the optical axis, the VCM actuator is configured to cause the AF coil to magnetically interact with the magnet.
4. The camera of claim 3 , wherein the AF coil is disposed, in the direction orthogonal to the optical axis, between the magnet and at least a portion of the coil holder.
5. The camera of claim 1 , wherein the camera is configured to convey current to drive the OIS coil via at least one of the flexures.
6. The camera of claim 1 , wherein the coil holder is attached to an upper surface of the sensor shift platform.
7. The camera of claim 1 , wherein the VCM actuator is configured to:
move the image sensor in a plurality of directions orthogonal to the optical axis; and
move the image sensor or the lens in at least one direction parallel to the optical axis.
8. A device, comprising:
one or more processors;
memory storing program instructions that are executable by the one or more processors to control operation of a camera; and
the camera, comprising:
a lens that defines an optical axis;
an image sensor configured to capture light passing through the lens and convert the captured light into image signals;
a voice coil motor (VCM) actuator, comprising:
a magnet; and
a plurality of optical image stabilization (OIS) coils;
a sensor shift platform coupled to the image sensor such that the image sensor is moveable together with the sensor shift platform;
flexures to mechanically connect one or more dynamic components of the camera to one or more static components of the camera, wherein the one or more dynamic components include the sensor shift platform; and
a coil holder coupled with an OIS coil of the plurality of OIS coils, such that the OIS coil is positioned proximate a top side of the magnet;
wherein to move the image sensor in a direction orthogonal to the optical axis, the VCM actuator is configured to cause at least one of the plurality of OIS coils to magnetically interact with the magnet.
9. The device of claim 8 , wherein:
the OIS coil is a first OIS coil; and
the coil holder is further coupled with a second OIS coil of the plurality of OIS coils, such that the second OIS coil is positioned proximate a bottom side of the magnet.
10. The device of claim 9 , wherein the VCM actuator further comprises:
an autofocus (AF) coil attached to the coil holder and positioned proximate the magnet;
wherein to move the image sensor in a direction parallel to the optical axis, the VCM actuator is configured to cause the AF coil to magnetically interact with the magnet.
11. The device of claim 10 , wherein the AF coil is disposed, in the direction orthogonal to the optical axis, between the magnet and at least a portion of the coil holder.
12. The device of claim 8 , wherein the flexures comprise:
a bottom flexure that extends along a first plane orthogonal to the optical axis; and
a top flexure that extends along a second plane orthogonal to the optical axis.
13. The device of claim 12 , wherein the magnet and the OIS coil are positioned, in a direction parallel to the optical axis, between the bottom flexure and the top flexure.
14. The device of claim 8 , wherein the coil holder is attached to an upper surface of the sensor shift platform.
15. The device of claim 8 , wherein the VCM actuator is configured to:
move the image sensor in a plurality of directions orthogonal to the optical axis; and
move the image sensor or the lens in at least one direction parallel to the optical axis.
16. A system, comprising:
a voice coil motor (VCM) actuator, comprising:
a magnet; and
a plurality of optical image stabilization (OIS) coils;
a sensor shift platform for coupling with an image sensor of a camera, such that the image sensor is moveable together with the sensor shift platform;
flexures to mechanically connect one or more dynamic components of the camera to one or more static components of the camera, wherein the one or more dynamic components include the sensor shift platform; and
a coil holder coupled with an OIS coil of the plurality of OIS coils, such that the OIS coil is positioned proximate a top side of the magnet;
wherein to move the image sensor in a direction orthogonal to an optical axis defined by a lens of the camera, the VCM actuator is configured to cause at least one of the plurality of OIS coils to magnetically interact with the magnet.
17. The system of claim 16 , wherein:
the OIS coil is a first OIS coil; and
the coil holder is further coupled with a second OIS coil of the plurality of OIS coils, such that the second OIS coil is positioned proximate a bottom side of the magnet.
18. The system of claim 16 , wherein the VCM actuator further comprises:
an autofocus (AF) coil attached to the coil holder and positioned proximate the magnet;
wherein to move the image sensor in a direction parallel to the optical axis, the VCM actuator is configured to cause the AF coil to magnetically interact with the magnet.
19. The system of claim 18 , wherein the AF coil is disposed, in the direction orthogonal to the optical axis, between the magnet and at least a portion of the coil holder.
20. The system of claim 16 , wherein the coil holder is attached to an upper surface of the sensor shift platform.