Camera Module OIS Using FPCB Elastic Restoring Force
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Solution Overview
Problem
Existing optical image stabilization technologies in camera modules often result in image distortion due to their complex structures and large number of components, which complicates the correction of camera shake and vibration.
Innovation Solution
A camera module design featuring a flexible printed circuit board (FPCB) with an elastic restoring force that connects the carrier and housing, allowing for movement in multiple axes while maintaining a constant optical axis, combined with a restoring spring for additional stabilization, thereby reducing image distortion and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a lens unit is supported with respect to a carrier by elastic forces of upper and lower springs, then the structure is generally simple, but image distortion occurs
Solution Approach 1:
The patent combines the FPCB and restoring spring into a single integrated component that provides both electrical connection and elastic restoring force. This merger eliminates the need for separate springs while maintaining structural simplicity and reducing image distortion through optimized integration of support and electrical functions.
Solution Approach 2:
The FPCB is designed to perform multiple functions simultaneously: providing electrical connections for sensor signals and power, offering mechanical support for the image sensor, and generating elastic restoring force for OIS operation. This multi-functionality reduces the number of components while improving image quality.
2Reliability
If multiple components are used for optical image stabilization, then stabilization function is achieved, but the number of components increases and structure becomes complex
Solution Approach 1:
The patent merges the FPCB and restoring spring into one integrated component that simultaneously provides electrical connection and elastic restoring force for OIS. This reduces the component count from multiple separate parts to a single multi-functional element, simplifying the overall structure while maintaining stabilization reliability.
Solution Approach 2:
The integrated FPCB-spring component performs multiple functions: electrical signal transmission, mechanical support, and elastic restoration for image stabilization. This multi-functionality eliminates the need for separate components while achieving reliable OIS performance.
3Stability of the object's composition
If a rigid connection is used between carrier and housing, then structural stability is improved, but the optical axis cannot remain constant during movement
Solution Approach 1:
The patent replaces rigid connections with a dynamic elastic connection through the integrated FPCB-spring component. This elastic connection allows the carrier to move relative to the housing during OIS operation while maintaining structural stability, ensuring the optical axis remains constant by providing controlled flexibility rather than rigid fixation.
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 design effectively corrects camera shake and vibration while minimizing image distortion and reducing the module's size and weight, maintaining a constant optical axis during movement, thus enhancing image quality.
Implementation Method 1
The FPCB may be made of a material which provides an elastic restoring force to restore the carrier to an initial position thereof with respect to the housing
Implementation Method 2
The elastic connection portion is disposed in a space between the fixing plate and the inner plate, provides an elastic restoring force between the fixing plate and the inner plate
Data Source
AI summary
The proposed invention relates to a camera module with an optical image stabilization function. A flexible printed circuit board (FPCB) electrically connected to an image sensor is implemented to serve as an electrical path and at the same time, serve to provide an elastic restoring force in directions of a plurality of axes, thereby further miniaturizing and lightening the camera module.