Multi-Axis Camera Module with Ball Bearing Shake Compensation
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Solution Overview
Problem
Conventional camera modules in portable electronic devices face limitations in shake compensation, particularly when capturing moving images, as they often require manual adjustment of the camera direction to track a moving subject, which can be inconvenient and imprecise.
Innovation Solution
A camera module design featuring a lens module and frames that rotate about multiple axes, with ball members and damper members providing elastic support, allowing for flexible movement and precise tracking of subjects, combined with magnetic and coil driving mechanisms for precise axis control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens module is moved only in a direction perpendicular to an optical axis using conventional actuators, then the structure is simple, but shake compensation is limited and cannot precisely track moving subjects
Solution Approach 1:
The patent introduces multi-axis rotation capability to the lens module, enabling it to rotate about a first axis perpendicular to the optical axis and a second axis perpendicular to both the optical axis and the first axis. This dimensional expansion from single-direction movement to multi-axis rotation significantly improves shake compensation precision and the ability to track moving subjects.
Solution Approach 2:
The patent employs ball members that are elastically supported to enable flexible and dynamic rotation of the lens module about multiple axes. This dynamic configuration allows the lens module to adaptively adjust its orientation in response to shake and moving subjects, enhancing compensation precision while maintaining operational flexibility.
2Ease of operation
If manual adjustment is required to track a moving subject, then the device structure remains simple, but ease of operation deteriorates and user convenience is reduced
Solution Approach 1:
The patent enables the camera module to automatically track moving subjects through its multi-axis rotation capability and elastic support mechanism. The system self-adjusts the lens module orientation in response to detected shake and subject movement, eliminating the need for manual user adjustment and significantly improving ease of operation.
Solution Approach 2:
The dynamically configurable multi-axis rotation system with elastically supported ball members allows automatic adaptation to moving subjects and shake conditions, providing self-service tracking functionality that enhances user convenience without requiring manual intervention.
3Reliability
If continuous shake compensation is attempted in moving image capture, then subject tracking capability improves, but device complexity increases due to additional rotational mechanisms
Solution Approach 1:
The patent uses elastically supported ball members to create a dynamic, continuously adaptable rotation mechanism. This elastic support system enables smooth, continuous adjustment of the lens module orientation during moving image capture, providing reliable continuous shake compensation while maintaining mechanical simplicity through the inherent flexibility of the elastic support.
Solution Approach 2:
By adding rotational degrees of freedom about two perpendicular axes, the patent enables comprehensive three-dimensional shake compensation capability. This multi-dimensional approach ensures reliable continuous compensation for shake occurring in any direction, significantly improving reliability for moving image capture.
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
Enables improved shake compensation and convenient subject tracking during image capture, enhancing the ability to capture clear images of moving subjects without the need for manual camera adjustment.
Implementation Method 1
a first ball member is disposed between the first frame and the second frame and elastically supported in a direction of the first axis, and a second ball member is disposed between the second frame and the housing and elastically supported in a direction of the second axis
Implementation Method 2
an actuator moves a lens module in an optical axis direction and a direction, perpendicular to an optical axis, using driving force generated by a magnet and a coil
Data Source
AI summary
A camera module includes a lens module, a first frame accommodating the lens module, a second frame accommodating the first frame, and a housing accommodating the second frame. The lens module and the first frame are rotatable about a first axis, with respect to the second frame, perpendicular to an optical axis. The lens module, the first frame, and the second frame are rotatable about a second axis, with respect to the housing, perpendicular to both the optical axis and the first axis. A first ball member is disposed between the first frame and the second frame and elastically supported in a direction of the first axis, and a second ball member is disposed between the second frame and the housing and elastically supported in a direction of the second axis.