Camera Module Frame Structure for Roll OIS and Shock Stability

The camera module is divided into three separate frames (first frame with lens, second frame with pitch/yaw coils, third frame with roll coils and stopper). This segmentation allows independent correction of different rotation axes, enabling the lens to remain stationary on the optical axis while the image sensor plane is stabilized, thus preventing video distortion while maintaining image quality.

The patent replaces traditional mechanical drive devices with electromagnetic coils (pitch coil, yaw coil, roll coil) that generate magnetic fields to rotate the image sensor or lens assembly. This substitution eliminates complex mechanical linkages, reduces the number of moving parts, and enables more compact ultra-small camera module design while maintaining effective image stabilization.

The patent positions the roll magnet and roll coil in a configuration that maximizes torque efficiency by optimizing their spatial arrangement in three dimensions. The roll magnet is disposed at a specific location on the image sensor assembly with its magnetization direction perpendicular to the rotation axis, and the roll coil is positioned to create an efficient magnetic field interaction. This dimensional optimization achieves sufficient rolling torque without increasing magnet size or power consumption.

The patent applies different magnetization directions to different magnets based on their specific functions and positions. The pitch magnet and yaw magnet are magnetized in directions perpendicular to each other, while the roll magnet is magnetized perpendicular to the rotation axis. This localized optimization of magnetic field orientation minimizes interference between adjacent magnets, allowing compact arrangement without compromising AF and zoom performance.