Dual Camera Module Single Housing Optical Axis Alignment
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Solution Overview
Problem
Dual camera modules in portable electronic devices face challenges with size reduction and optical axis alignment due to the parallel arrangement of independent camera modules, which can lead to warpage and limitations in minimizing the overall size, and require additional reinforcement.
Innovation Solution
A dual camera module design featuring a single housing with movable and fixed lens modules, different angles of view, and image sensors on separate printed circuit boards, allowing for focus adjustment and easy optical axis alignment, eliminating the need for separate brackets and enabling reduced size without compromising reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If two independent camera modules are simply disposed in parallel, then the dual camera can be assembled, but the overall size cannot be reduced and additional reinforcement through stiffener is required
Solution Approach 1:
The patent merges two independent camera modules into a single integrated housing structure. The first and second lens modules are mounted on the same housing, sharing common structural support and alignment mechanisms. This integration eliminates the need for separate brackets and stiffeners, reducing overall size while maintaining structural stability through unified design.
Solution Approach 2:
The patent arranges lens modules in a stacked configuration along the optical axis direction rather than simple parallel placement. By utilizing the depth dimension (optical axis direction) for mounting different lens modules at different positions, the design reduces the lateral footprint while maintaining structural integrity without additional reinforcement.
2Ease of manufacture
If two independent camera modules are simply disposed in parallel, then the dual camera can be assembled, but optical axis alignment becomes difficult during assembling process
Solution Approach 1:
The patent incorporates preliminary alignment features directly into the housing structure during manufacturing. Alignment marks, guide pins, or precision-machined mounting surfaces are built into the housing before assembly, enabling accurate optical axis alignment of lens modules during the assembling process without requiring complex adjustment procedures.
3Volume of moving object
If lens modules are mounted at different positions in optical axis direction, then size can be reduced, but attachment positions of printed circuit boards must be different
Solution Approach 1:
The patent segments the electrical connection structure by providing separate printed circuit boards for different lens modules. The first printed circuit board is attached at a first position and the second printed circuit board at a second position in the optical axis direction, allowing each lens module to have its dedicated connection point. This segmentation enables compact arrangement while maintaining electrical connectivity for all components.
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
The solution allows for a compact dual camera module with improved reliability against external shocks and simplified optical axis alignment, enhancing the camera's functionality and usability in portable devices.
Implementation Method 1
a first actuator configured to move one of the plurality of lens modules in an optical axis direction
Implementation Method 2
configured to convert light incident through the first lens module to an electric signal
Data Source
AI summary
A dual camera module includes a single housing accommodating a plurality of lens modules, a first actuator configured to move one of the plurality of lens modules in an optical axis direction, and a plurality of printed circuit boards attached to a lower portion of the single housing. One printed circuit board corresponding to a lens module moved by the first actuator, among the plurality of printed circuit boards, is disposed to be lower than the other printed circuit boards in the optical axis direction.