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Canon Patent Application: IBIS Improvements
This patent application Canon explores further refinement of the voice coils used in Canon's IBIS implementation.
If you studied basic electricity when you were in school (or are in school), then you'd know a generator is basically a magnet that has the wires intersecting the magnetic field. With motion (or change in magnetic field strength), electricity happens. This of course, is really bad with a sensor sitting so close to the voice coils, as the magnetic field can cause noise. Noise as we all know is bad.
This goes into the shielding and perhaps the deepest look into the manufacturing of Canon's IBIS system where they are looking at shielding while at the same time making the IBIS unit smaller.
when the coil as the imaging device described in Patent Document 1 is arranged in the vicinity of the imaging device, the magnetic field by the coil has reached the imaging element , It adversely affects the image as magnetic noise. Furthermore, as the sensitivity of the image sensor increases, in addition to the coil that is the noise source, a weak magnetic field from the solder joint of the coil terminal and the wiring pattern to which the coil is connected also adversely affects the image as magnetic noise.
On the other hand, because the spacing between the imaging element and the coil is narrow, it is difficult to place the shielding member between the imaging device and the coil as described in Patent Document 2.
Therefore, an object of the present invention, while reducing the size of, is to provide a motion compensation device and an electronic apparatus capable of reducing the influence of the magnetic field with respect to the imaging element.
Canon Patent Application 2020-170963
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