Camera Module Spring Guide Structure for AF and OIS Stability
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Solution Overview
Problem
Camera modules in portable devices face challenges in reducing height while maintaining high magnification and requiring auto focus (AF) and optical image stabilization (OIS) functions, with existing mechanisms leading to increased horizontal movement and tilt.
Innovation Solution
A camera module design incorporating elastic springs and holder guide portions to guide lens movement in the optical axis direction, minimizing horizontal displacement and incorporating AF and OIS functions within a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lens holding mechanisms are used to enable AF and OIS functions, then the camera module can achieve auto focus and optical image stabilization, but horizontal movement and tilt of the lens holder increase
Solution Approach 1:
The patent changes the mechanical parameter of the lens holder by adding guide portions that constrain its movement parameters. The guide portions limit the lens holder to move only in the vertical direction (optical axis direction), eliminating horizontal movement degrees of freedom while preserving AF and OIS functionality through controlled vertical displacement.
Solution Approach 2:
The guide portions act as intermediary elements between the lens holder and the camera module housing. These guide portions mediate the movement of the lens holder by providing vertical guidance while preventing horizontal displacement, thus resolving the contradiction between enabling AF/OIS functions and maintaining horizontal stability.
2Adaptability or versatility
If the camera module is designed with high magnification and multifunctional capabilities, then the camera performance is improved, but the height of the camera module increases
Solution Approach 1:
The patent employs dynamic movement of the lens holder along the optical axis direction to achieve high magnification and multifunctional capabilities. By enabling the lens holder to move vertically rather than requiring additional vertical space for multiple fixed lenses, the module achieves adaptability for AF and OIS functions while controlling the overall height of the camera module.
3Ease of operation
If the lens holder is allowed to move freely for AF function, then the auto focus capability is improved, but horizontal displacement and tilt occur
Solution Approach 1:
The guide portions change the movement parameters of the lens holder by constraining it to vertical motion only. This parameter change allows the AF function to operate smoothly through vertical displacement while preventing horizontal displacement and tilt, thereby maintaining manufacturing precision and positioning accuracy.
4Stability of the object's composition
If multiple guide portions are combined to guide lens holder movement, then the control over horizontal movement is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple guide portions into an integrated holder guide structure that collectively guides the lens holder movement. By merging the functionality of multiple guide elements into a unified structure, the design achieves stable control over horizontal movement while minimizing the increase in device complexity through structural integration.
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 reduces horizontal movement and tilt, enhances reliability, and allows for independent control of AF and OIS functions, minimizing weight and size while maintaining performance.
Implementation Method 1
one end of the first elastic springs may be moved up or down along with the lens holder in an optical axis direction
Implementation Method 2
A camera module having an elastic spring that is stretched or restored so as to be up or down in the optical axis direction with respect to the lens holder
Data Source
AI summary
A camera module disclosed in an embodiment of the invention includes a substrate; an image sensor on the substrate; a lens holder having at least one lens on the image sensor; a holder guide portion spaced apart from the outside of the lens holder and having a plurality of guide portions; a plurality of first elastic springs having one end connected to the lens holder and the other end connected to the holder guide portion; a plurality of second elastic springs connecting the plurality of guide portions of the holder guide portion to each other; and a driving member disposed around the lens holder, and one end of the first elastic spring may be moved up or down along with the lens holder in an optical axis direction.