Camera focus and stabilization system
Various embodiments include a camera with a voice coil motor (VCM) actuator assembly to provide autofocus (AF) and/or optical image stabilization (OIS) movement. The VCM actuator assembly is configured to move an image sensor of the camera in three dimensions (e.g. X, Y, and Z) to provide the AF and/or OIS movements. The VCM actuator assembly is asymmetrical and includes an at least partially open side that allows an optical assembly of the camera to pass through the open side of the VCM actuator. In some embodiments, the optical assembly is part of a folded optics arrangement of the camera that includes one or more prisms/and or lenses.
1 . A voice coil motor assembly, comprising:
a substrate carrier configured to support an image sensor;
a suspension configured to allow for translation of the image sensor in an autofocus direction and one or more optical image stabilization directions;
one or more voice coil motors, comprising magnets and coils, configured to translate the image sensor in the autofocus direction and the one or more optical image stabilization directions;
a flexure assembly, comprising:
a static portion, coupled to a static member;
a moveable portion coupled to the substrate carrier; and
flexure arms that connect the substrate carrier to the static portion of the flexure assembly, wherein the one or more flexure arms comprise traces configured to transmit electrical signals between the image sensor and the static portion while the moveable portion moves in an autofocus or optical image stabilization direction.
2 . The voice coil motor assembly of claim 1 , wherein the traces are on a top side or a bottom side of the flexure arms.
3 . The voice coil motor assembly of claim 1 , wherein individual ones of the flexure arms comprise multiple layers of the traces.
4 . The voice coil motor assembly of claim 1 , wherein a trace on an individual one of the flexure arms provides a ground path for an electrical component.
5 . The voice coil motor assembly of claim 1 , further comprising a carrier frame at least partially surrounding the substrate carrier, wherein one side of the carrier frame is at least partially open, and wherein the magnets are mounted on three remaining sides of the carrier frame that are not open.
6 . The voice coil motor assembly of claim 5 , wherein:
the magnets move with the carrier frame, and
one or more of the coils are mounted to a static flexure of the voice coil motor assembly.
7 . The voice coil motor assembly of claim 1 ,
further comprising:
a carrier frame at least partially surrounding the substrate carrier, and
a spring plate that mechanically couples the substrate carrier to the carrier frame;
wherein one or more elements of the suspension are mechanically connected to the carrier frame at corners of the carrier frame via flex tabs of the spring plate;
wherein the flex tabs of the spring plate are configured to absorb impact stresses to reduce stresses experienced by the suspension elements during an impact event; and
wherein the suspension elements restrict rotation of the carrier frame within the voice coil motor assembly.
8 . A camera, comprising:
an aperture configured to enable light to enter the camera;
an image sensor configured to capture the light that has entered the camera and convert the light into image signals;
a substrate carrier configured to support the image sensor;
a suspension configured to allow for translation of the image sensor in an autofocus direction and one or more optical image stabilization directions;
one or more voice coil motors, comprising magnets and coils, configured to translate the image sensor in the autofocus direction and the one or more optical image stabilization directions;
a flexure assembly, comprising:
a static portion, coupled to a static member;
a moveable portion coupled to the substrate carrier; and
flexure arms that connect the substrate carrier to the static portion of the flexure assembly, wherein the one or more flexure arms comprise traces configured to transmit electrical signals between the image sensor and the static portion while the moveable portion moves in an autofocus or optical image stabilization direction.
9 . The camera of claim 8 , wherein the traces are on a top side or a bottom side of the flexure arms.
10 . The camera of claim 8 , wherein individual ones of the flexure arms comprise multiple layers of the traces.
11 . The camera of claim 8 , wherein a trace, of the traces, on an individual one of the flexure arms provides a ground path for an electrical component.
12 . The camera of claim 8 , wherein the camera is a folded optics camera comprising:
a prism configured to redirect the light that enters the camera via the aperture; and
an additional prism configured to redirect the light redirected by the prism such that the light is directed into the autofocus direction, wherein the image sensor is positioned in the camera such that the light directed in the autofocus direction is directed toward the image sensor.
13 . The camera of claim 12 , further comprising:
a carrier frame at least partially surrounding the substrate carrier;
wherein:
the carrier frame and the substrate carrier are at least partially open on at least one side of the carrier frame and the substrate carrier; and
at least a portion of the additional prism extends through an open side of the carrier frame and the substrate carrier.
14 . The camera of claim 8 , further comprising:
a carrier frame at least partially surrounding the substrate carrier;
a dual pole magnet coupled to a first side of the carrier frame;
a second dual pole magnet coupled to a second side of the carrier frame; and
a single pole magnet coupled to a third side of the carrier frame,
wherein the first side and the second side of the carrier frame are opposite parallel sides of the carrier frame, such that the dual pole magnet and the second dual pole magnet are oriented parallel to one another, and
wherein the third side of the carrier frame is orthogonal to the first and second side of the carrier frame, such that the single pole magnet is oriented perpendicular to the dual pole magnet and the second dual pole magnet.
15 . A mobile multifunction device comprising:
a camera comprising:
an aperture configured to enable light to enter the camera;
an image sensor configured to capture the light that has entered the camera and convert the light into image signals;
a substrate carrier configured to support the image sensor;
a suspension configured to allow for translation of the image sensor in an autofocus direction and one or more optical image stabilization directions;
one or more voice coil motors, comprising magnets and coils, configured to translate the image sensor in the autofocus direction and the one or more optical image stabilization directions;
a flexure assembly, comprising:
a static portion, coupled to a static member;
a moveable portion coupled to the substrate carrier; and
flexure arms that connect the substrate carrier to the static portion of the flexure assembly, wherein the one or more flexure arms comprise traces configured to transmit electrical signals between the image sensor and the static portion while the moveable portion moves in an autofocus or optical image stabilization direction;
a display; and
one or more processors configured to cause the one or more voice coil motors to move the image sensor in the autofocus direction and the one or more optical image stabilization directions.
16 . The mobile multifunction device of claim 15 , wherein the traces are on a top side or a bottom side of the flexure arms.
17 . The mobile multifunction device of claim 15 , wherein individual ones of the flexure arms comprise multiple layers of the traces.
18 . The mobile multifunction device of claim 15 , wherein a trace on an individual one of the flexure arms provides a ground path for an electrical component.
19 . The mobile multifunction device of claim 15 , wherein the camera is a folded optics camera comprising:
a prism configured to redirect the light that enters the camera via the aperture; and
an additional prism configured to redirect the light redirected by the prism such that the light is directed into the autofocus direction, wherein the image sensor is positioned in the camera such that the light directed in the autofocus direction is directed toward the image sensor.
20 . The mobile multifunction device of claim 19 , further comprising:
a carrier frame at least partially surrounding the substrate carrier;
wherein:
the carrier frame and the substrate carrier are at least partially open on at least one side of the carrier frame and the substrate carrier; and
at least a portion of the additional prism extends through an open side of the carrier frame and the substrate carrier.