Camera Module Shape-Memory Alloy Biasing for Image Stabilization
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Solution Overview
Problem
Conventional camera modules in electronic devices often produce blurry images due to shaking, which existing technologies fail to adequately address through effective image stabilization and auto-focusing mechanisms.
Innovation Solution
A camera module design incorporating shape-memory alloy biasing elements that connect the image sensor and optical lens to a base, allowing for controlled movement and rotation relative to the base, enabling optical image stabilization and auto-focusing by applying driving signals to these elements, thereby compensating for lens shake and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the image sensor and optical lens are fixed rigidly to prevent movement, then structural stability is improved, but the ability to compensate for lens shake and perform auto-focusing is lost
Solution Approach 1:
The patent applies the dynamics principle by replacing rigid fixed connections with movable mounting structures. The image sensor is mounted on a movable platform that can shift position, and the optical lens is connected via a movable holder. These dynamic structures allow the components to move in response to shaking, enabling optical image stabilization while maintaining structural integrity through controlled movement rather than rigid fixation.
2Reliability
If shape-memory alloy biasing elements are used to enable controlled movement, then optical image stabilization and auto-focusing capabilities are improved, but device complexity increases
Solution Approach 1:
The patent applies mechanics substitution by replacing traditional mechanical actuation systems with shape-memory alloy (SMA) biasing elements. Instead of using motors, gears, or complex mechanical linkages to move the image sensor and optical lens, the invention uses SMA elements that can be actuated by electrical signals to produce controlled movements. This substitution reduces mechanical complexity while achieving the required stabilization and auto-focusing functions.
Solution Approach 2:
The patent applies parameter changes by utilizing the unique properties of shape-memory alloy materials. The SMA biasing elements change their physical parameters (length, shape) in response to electrical stimulation, enabling controlled movement of the image sensor and optical lens. This material-based parameter change provides a compact and relatively simple mechanism compared to traditional mechanical actuation systems.
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 effectively stabilizes the image sensor and optical lens, reducing blur and enhancing image quality by allowing controlled linear and rotational movements in response to lens shake, achieving optical image stabilization and auto-focusing capabilities.
Implementation Method 1
The first biasing element comprises a shape-memory alloy
Data Source
AI summary
A camera module is provided, disposed in an electronic device, including a base, a holder, an image sensor, a bottom, and a first biasing element. The base is fixed to a casing of the electronic device. The holder is configured to hold an optical lens and connects to the base. The image sensor is supported by the bottom. The base is situated between the holder and the bottom. The first biasing element connects to the bottom and the base, and forces the bottom and the image sensor to move relative to the base.