Optical Element Driving Mechanism for Vibration Compensation
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Solution Overview
Problem
Electronic devices with lens modules, such as smartphones and tablets, experience blurry images due to device shaking, necessitating a vibration-proof solution to enhance image quality.
Innovation Solution
An optical element driving mechanism comprising a plate, base, first and second holders, and a biasing assembly, including shape memory alloy materials and electromagnetic driving assemblies, which forces the holders and optical elements to move relative to the plate for auto-focusing and shake compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration-proof mechanism is added to lens module, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent combines the vibration-proof mechanism with the existing lens module structure by integrating the movable platform into the lens housing. The biasing assembly and electromagnetic driving assembly are incorporated within the same structural framework, merging stabilization functionality with the optical system rather than adding separate external components.
Solution Approach 2:
The movable platform serves multiple functions: it holds multiple optical elements (lenses), provides vibration compensation, and enables auto-focusing through electromagnetic driving. The biasing assembly simultaneously provides mechanical support and restoration force, while the electromagnetic assembly handles both stabilization and focusing operations.
2Productivity
If multiple optical elements are held in small space, then productivity is improved, but manufacturing precision becomes more difficult
Solution Approach 1:
The patent divides the optical system into separate holders (first holder, second holder) mounted on a common movable platform. Each optical element has its own holder that can be independently positioned and adjusted, allowing precise manufacturing tolerances for each component while maintaining compact overall structure.
Solution Approach 2:
The patent employs a nested arrangement where multiple holders are stacked or positioned in close proximity on the movable platform. The holders, biasing assembly, and electromagnetic driving assembly are arranged in a compact configuration that maximizes space utilization while maintaining manufacturing feasibility.
3Measurement precision
If electromagnetic driving assembly is added for precise control, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The electromagnetic driving assembly acts as an intermediary between the control system and the optical elements. It converts electrical signals into precise mechanical movements of the movable platform, enabling accurate control of optical element positions for both stabilization and auto-focusing without requiring direct mechanical linkages.
Solution Approach 2:
The patent replaces traditional mechanical focusing and stabilization mechanisms with an electromagnetic driving assembly. This substitution eliminates complex mechanical linkages, gears, and linkages in favor of electromagnetic actuation, reducing mechanical complexity while improving control precision.
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 mechanism effectively stabilizes images by allowing controlled movement of optical elements, improving image quality and reducing vibrations, thereby enhancing the camera's performance in electronic devices.
Implementation Method 1
the biasing assembly includes a memory alloy material
Implementation Method 2
the first electromagnetic driving assembly includes a first coil and a first magnetic element. The first coil is disposed on the first holder, the first magnetic element corresponds to the first coil
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a first holder, a second holder, a plate, a biasing assembly, and an electromagnetic driving assembly. The first holder holds a first optical element with a first optical axis. The second holder holds a second optical element with a second optical axis. The plate is disposed below the first holder and the second holder. The biasing assembly forces the first holder to move relative to the plate on a plane substantially perpendicular to the first optical axis, and includes a biasing element, wherein when a driving signal is applied to the biasing element, a length of the biasing element is changed. The electromagnetic driving assembly forces the second holder to move relative to the plate and comprising a first magnetic element and a coil.