Image Sensor Drive With Shape Memory Alloy Wires for Tilt Correction
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Solution Overview
Problem
Existing camera devices require complex spring structures and multiple elastic members for lens barrel movement, leading to complicated assembly processes and difficulty in tilt correction, which complicates the module structure and increases production time.
Innovation Solution
A sensor driving device utilizing shape memory alloy wires for relative movement of the image sensor with respect to the lens barrel, allowing X-axis, Y-axis, and Z-axis movement, and tilt correction, simplifying the spring structure and reducing the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple elastic members (springs) are used to move the lens barrel, then the lens barrel can achieve X-axis, Y-axis, and Z-axis movement, but the module structure becomes complicated and the number of assembly processes increases
Solution Approach 1:
The patent combines multiple elastic members into a single integrated elastic substrate that provides both X-axis and Y-axis movement capabilities. The elastic substrate includes first elastic portions for X-axis movement and second elastic portions for Y-axis movement, merging the functions of multiple separate springs into one component, thereby simplifying the module structure while maintaining full movement capability.
2Adaptability or versatility
If multiple elastic members are used to move the lens barrel, then the lens barrel can achieve X-axis, Y-axis, and Z-axis movement, but the number of assembly processes increases
Solution Approach 1:
The patent combines multiple elastic members into a single integrated elastic substrate that provides both X-axis and Y-axis movement capabilities. The elastic substrate includes first elastic portions for X-axis movement and second elastic portions for Y-axis movement, merging the functions of multiple separate springs into one component, thereby simplifying the module structure while maintaining full movement capability.
3Adaptability or versatility
If a complex spring structure is used for lens barrel movement, then focus correction and shake compensation can be achieved, but tilt correction becomes difficult and module structure is complicated
Solution Approach 1:
The patent combines multiple elastic members into a single integrated elastic substrate that provides both X-axis and Y-axis movement capabilities. The elastic substrate includes first elastic portions for X-axis movement and second elastic portions for Y-axis movement, merging the functions of multiple separate springs into one component, thereby simplifying the module structure while maintaining full movement capability.
Solution Approach 2:
The patent employs an elastic substrate with elastic portions that can dynamically deform in multiple directions. The first elastic portions can elastically deform to move the lens barrel in the X-axis direction, while the second elastic portions can elastically deform to move the lens barrel in the Y-axis direction, enabling dynamic adjustment for focus correction, shake compensation, and tilt correction.
4Adaptability or versatility
If traditional spring structures and magnets or coils are used for image stabilization, then autofocus and hand shake correction can be achieved, but product cost and thickness increase
Solution Approach 1:
The patent replaces the traditional mechanical system involving magnets and coils with an elastic substrate-based system. The elastic substrate uses elastic deformation of its portions to achieve lens barrel movement for autofocus and hand shake correction, eliminating the need for magnets, coils, and complex spring structures, thereby reducing product cost and thickness.
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 enables stable image stabilization and autofocus functions with a simplified structure, reducing product cost and thickness by eliminating the need for magnets or coils, and allowing for 5-axis hand shake correction.
Implementation Method 1
a first wire part of a shape memory alloy having both ends connected to the first pad and moving the moving part with respect to the fixed part
Implementation Method 2
a second wire part having one end connected to the first lead pattern part and the other end connected to the moving part to elastically support the moving part
Data Source
AI summary
A sensor driving device according to an embodiment includes a fixed part including a first substrate on which a first lead pattern part and a first pad are formed; a moving part spaced apart from the fixed part and including a sensor; and a wire part disposed between the moving part and the fixed part, wherein the wire part includes a first wire part of a shape memory alloy having both ends connected to the first pad and moving the moving part with respect to the fixed part; and a second wire part having one end connected to the first lead pattern part and the other end connected to the moving part to elastically support the moving part.