Movable Image Sensor OIS Actuator With Dual-Driver Frame
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Solution Overview
Problem
The increasing weight of lens modules in camera modules for mobile devices has made it difficult to precisely control the driving force for optical image stabilization, as the weight of the driver and lens module combinations has become challenging to manage effectively.
Innovation Solution
The design incorporates a moving frame with a reinforcing plate and a dual-driver system using magnetic and coil configurations to generate driving forces in multiple axes, allowing the image sensor to move perpendicular to the optical axis for stabilization, rather than the lens module, thereby reducing the weight and complexity of the stabilization mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens module weight is increased to improve camera performance, then the image quality is improved, but the weight of the driver and lens module combination increases making it difficult to precisely control the driving force for optical image stabilization
Solution Approach 1:
The patent extracts the stabilization function from the lens module and applies it to the image sensor instead. By moving the image sensor perpendicular to the optical axis rather than moving the heavy lens module, the system achieves optical image stabilization while significantly reducing the weight of the moving component that the driver must control.
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 approach enables precise optical image stabilization with reduced weight and increased reliability, as the lighter image sensor is moved to achieve stabilization, maintaining precise control over the stabilization forces while minimizing the overall module's weight and size.
Implementation Method 1
a first driver, disposed on the moving frame and the fixed frame, configured to provide a driving force to the moving frame; a plurality of magnetic bodies disposed on the fixed frame to generate attractive force with respect to the first driver disposed on the moving frame
Data Source
AI summary
An actuator for optical image stabilization, includes a fixed frame having an internal space; a moving frame, accommodated in the internal space, configured to linearly and rotatably move on a plane perpendicular to an optical axis; a first ball member disposed between the fixed frame and the moving frame; a first driver, disposed on the moving frame and the fixed frame, configured to provide a driving force to the moving frame; a plurality of magnetic bodies disposed on the fixed frame to generate attractive force with respect to the first driver disposed on the moving frame; a sensor substrate having a portion coupled to the moving frame to be movable, together with the moving frame, and another portion coupled to the fixed frame; and an image sensor disposed on the portion of the sensor substrate.