OIS Actuator Sensor Substrate Heat Dissipation
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Solution Overview
Problem
Recent improvements in camera module performance have increased the weight of the lens module, making it difficult to precisely control the driving force when moving the lens module for optical image stabilization.
Innovation Solution
An actuator for optical image stabilization is designed with a sensor substrate that includes a fixed portion, a moving portion with an image sensor and a heat dissipation member, and a connecting portion to support movement. The heat dissipation member, featuring a substrate with through-holes and conductive electrodes, overlaps the image sensor to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens module weight is increased to improve camera module performance, then imaging performance is improved, but control precision of driving force deteriorates
Solution Approach 1:
The patent divides the sensor substrate into fixed and moving portions, allowing the image sensor to be separated from the stabilization mechanism. This segmentation enables independent optimization of the image sensor mounting and the OIS mechanism, improving control precision without compromising imaging performance.
Solution Approach 2:
The patent introduces a heat dissipation member with conductive electrodes as an intermediary between the image sensor and the moving frame. This intermediary structure serves dual purposes: dissipating heat from the image sensor and providing a stable mounting interface that maintains control precision despite increased lens module weight.
2Productivity
If the image sensor generates heat during operation, then imaging function is maintained, but temperature increase affects sensor performance
Solution Approach 1:
The patent converts the harmful heat generated by the image sensor into a manageable thermal flow by introducing a heat dissipation member with through-holes and conductive electrodes. The heat is channeled through the conductive electrodes to the moving frame, which acts as a heat sink, thereby maintaining imaging function while controlling temperature.
Solution Approach 2:
The heat dissipation member incorporates a substrate with through-holes, creating a porous structure that facilitates heat flow. The conductive electrodes within the through-holes provide thermal pathways from the image sensor to the moving frame, effectively dissipating heat while maintaining structural integrity.
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 solution allows for precise control of the driving force to move the image sensor, improving optical image stabilization performance while effectively reducing the temperature of the image sensor through enhanced heat dissipation.
Implementation Method 1
a heat dissipation member dissipating heat generated from the image sensor, and the heat dissipation member includes a substrate having a through-hole, and a conductive electrode filling the through-hole
Data Source
AI summary
An actuator for optical image stabilization includes a fixed frame; a moving frame, accommodated in the fixed frame, configured to move relatively to the fixed frame on a plane perpendicular to an optical axis; and a sensor substrate, on which an image sensor is disposed, comprising a fixed portion coupled to the fixed frame, a moving portion comprising the image sensor and coupled to the moving frame, and a connecting portion disposed between the moving portion and the fixed portion to support movement of the moving portion. The moving portion includes a heat dissipation member dissipating heat generated from the image sensor, and the heat dissipation member includes a substrate having a through-hole, and a conductive electrode filling the through-hole.