Camera Module Lens Segmentation for Compact OIS and AF
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Solution Overview
Problem
Current camera module designs face challenges with space efficiency and increased size due to separate spaces required for auto-focus implementation, as well as high current consumption when moving all lenses during auto-focusing operations.
Innovation Solution
The design incorporates a housing with an optical image stabilization (OIS) coil and an auto-focus (AF) coil, where a first lens is along the optical axis, a second lens is deformable for AF, and a third lens is moved perpendicular to the axis by an OIS carrier, with a processor controlling current application to both coils to optimize lens movement and reduce unnecessary space and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate space is secured for AF implementation with integrally moving lenses, then AF functionality is achieved, but space efficiency is reduced and camera module size increases
Solution Approach 1:
The patent segments the lens assembly into multiple independently controllable lens units (first lens unit with OIS function, second lens unit with AF function). This allows each lens unit to be controlled separately through dedicated coils (OIS coil and AF coil), enabling compact integration without requiring separate spaces for AF implementation, thus reducing overall camera module size while maintaining AF functionality.
2Adaptability or versatility
If all lenses are moved during auto-focusing operation, then AF functionality is achieved, but current consumption increases
Solution Approach 1:
The patent applies partial action by moving only the second lens unit (containing the second lens) during auto-focusing operations, rather than moving all lens units. The first lens unit remains stationary during AF, reducing the total mass being moved and consequently lowering current consumption. The OIS function is maintained by the first lens unit when needed, while AF is achieved through selective movement of the second lens unit.
3Adaptability or versatility
If separate spaces are allocated for OIS and AF mechanisms, then both functions are achieved, but device complexity increases
Solution Approach 1:
The patent merges the OIS and AF mechanisms into a single integrated lens assembly structure. The first lens unit and second lens unit are positioned adjacent to each other within the same housing, sharing common support structures and control electronics. The OIS coil and AF coil are integrated into the same module, allowing both functions to coexist without requiring separate spaces, thereby reducing overall device complexity while maintaining both OIS and AF functionalities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances space utilization, reduces the overall camera module size, and decreases current consumption by performing auto-focus functions using some lenses rather than all, thereby improving efficiency and power management.
Implementation Method 1
the coil or magnet may be moved in a particular direction by magnetic force generated by the coil or magnet, when a current is applied
Implementation Method 2
the coil or magnet may be moved in a particular direction by magnetic force generated by the coil or magnet, when a current is applied
Data Source
AI summary
An electronic device is disclosed, including a housing, an optical image stabilization (OIS) coil and an auto-focus (AF) coil, a first lens disposed along an optical axis, a second lens disposed under the first lens, and a third lens disposed under the second lens, the second lens is deformable according to movement of an AF carrier, an OIS carrier including an OIS magnet disposed corresponding to the OIS coil of the housing, and configured to move the third lens along a direction perpendicular to the optical axis, wherein the AF carrier includes an AF magnet corresponding to the AF coil, to move the second lens along the optical axis, and a processor configured to apply a current to the OIS coil to move the OIS carrier, resulting in movement of the third lens in the direction perpendicular to the optical axis, and apply a current to the AF coil to deform the second lens by movement of the AF carrier.