Camera Module Shape-Memory Alloy Driving Wire OIS
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Solution Overview
Problem
The increasing complexity and size of camera modules in portable electronic devices due to the addition of features like auto-focusing and optical image stabilization pose a challenge in miniaturization and integration, leading to larger device sizes.
Innovation Solution
A camera module design featuring a fixed frame with a movable frame connected by a driving wire made of shape-memory alloy, coupled with wedge-shaped coupling members, allowing for linear movement and electrical connection, which enables optical image stabilization while maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional OIS methods and additional camera functions are added, then optical image stabilization and auto-focusing functions are improved, but camera module size and structural complexity increase
Solution Approach 1:
The patent combines the OIS driving mechanism with the lens barrel structure by integrating the movable frame that holds both the lens barrel and image sensor into a single movable unit. This merging of functions allows the camera module to achieve optical image stabilization without requiring separate dedicated structures for each function, thereby controlling overall module size while providing improved OIS and auto-focusing capabilities
Solution Approach 2:
The driving wire structure serves multiple functions simultaneously: it provides the driving force for OIS, enables auto-focusing movement, and acts as a structural support element. This multi-functionality reduces the need for additional separate components, allowing the camera module to achieve enhanced optical image stabilization without proportionally increasing in size
2Reliability
If conventional OIS methods and additional camera functions are added, then optical image stabilization and auto-focusing functions are improved, but structural complexity increases
Solution Approach 1:
The patent merges the driving wire structure with the lens barrel support structure, creating an integrated assembly where the movable frame simultaneously supports the lens barrel and image sensor. This consolidation reduces the number of separate components and connection points, thereby reducing structural complexity while maintaining reliable optical image stabilization function
Solution Approach 2:
The driving wire assembly serves as a universal structure that provides both OIS driving force and auto-focusing capability through its ability to move the entire movable frame assembly. This multi-functional design eliminates the need for separate driving mechanisms for different camera functions, significantly reducing structural complexity
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
This design enhances operational reliability and ease of manufacturing by providing a compact and efficient mechanism for optical image stabilization, reducing the need for complex structures and minimizing size increases in portable devices.
Implementation Method 1
a driving wire including a wire member formed of a shape-memory alloy
Data Source
AI summary
A camera module includes a fixed frame having an internal space, a movable frame installed in the internal space of the fixed frame to be movable, with at least one optical member mounted thereon, and a driving wire including a wire member formed of a shape-memory alloy, and two coupling members coupled to the wire member and formed in a wedge shape, wherein the fixed frame includes a first wire coupling portion disposed to protrude toward the movable frame, and the movable frame includes a second wire coupling portion disposed to protrude toward the fixed frame, and the two coupling members of the driving wire are inserted into the first wire coupling portion and the second wire coupling portion, respectively, to connect the movable frame and the fixed frame to each other.