Sensor Driving Substrate Layout for Compact Camera Autofocus
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Solution Overview
Problem
Existing camera modules face challenges in reducing the size and power consumption of sensor driving devices while maintaining autofocus and image stabilization functions.
Innovation Solution
A sensor driving device design featuring a second substrate with protrusion parts and pad parts on a first substrate, allowing for a compact configuration with overlapping components to reduce size and power consumption, and a camera module with a liquid lens unit for auto-focusing and image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sensor driving device uses a compact configuration with overlapping components, then the size is reduced, but the manufacturing complexity increases
Solution Approach 1:
The second substrate is disposed on the first substrate in an overlapping configuration, with protrusion parts extending between components to enable nested arrangement. This nesting principle allows multiple components (substrates, protrusion parts, pad parts) to be arranged in a compact, space-efficient manner while maintaining electrical and mechanical connections, thereby reducing the overall size of the sensor driving device.
Solution Approach 2:
The protrusion parts extend in multiple directions (first direction and second direction different from the first direction) from the body of the second substrate, utilizing three-dimensional space rather than simple planar arrangement. This dimensional approach allows components to be stacked and arranged vertically and horizontally, reducing the footprint area while managing structural complexity through organized spatial distribution.
2Use of energy by moving object
If the sensor driving device reduces power consumption, then energy efficiency improves, but the driving force for autofocus and image stabilization may be insufficient
Solution Approach 1:
The patent employs electromagnetic driving units (first and second driving units with coils and magnets) to replace traditional mechanical driving mechanisms. This electromagnetic substitution provides efficient power consumption by using electrical fields to generate the necessary driving forces for moving the lens assembly during autofocus and image stabilization operations, achieving both low power consumption and sufficient driving force.
3Adaptability or versatility
If the camera module includes autofocus and image stabilization functions, then functionality is improved, but the size and power consumption increase
Solution Approach 1:
The first substrate and second substrate are merged into a single integrated structure with the second substrate disposed on the first substrate. The protrusion parts and pad parts create interconnected pathways that combine multiple functions (electrical connection, mechanical support, and driving unit integration) into a unified compact structure. This merging allows autofocus and image stabilization functions to be implemented without proportionally increasing the overall module size.
Solution Approach 2:
The second substrate serves multiple functions simultaneously: it provides mechanical support for the image sensor, houses the protrusion parts for structural integration, contains the pad parts for electrical connections, and incorporates the electromagnetic driving units for both autofocus and image stabilization operations. This multi-functionality reduces the need for separate dedicated components, thereby minimizing the overall camera module size while maintaining advanced functionality.
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 design achieves a reduction in the size and power consumption of the sensor driving device, enabling a more compact camera module with improved functionality.
Implementation Method 1
a first driving unit disposed on the second substrate and a second driving unit corresponding to the first driving unit
Data Source
AI summary
A sensor driving device includes a first substrate; a second substrate disposed on the first substrate; and an image sensor. The second substrate includes a body having first and second lateral surfaces; a first protrusion part protruding from the first lateral surface; and a second protrusion part protruding from the second lateral surface. The first protrusion part includes a first extension part, and a second extension part extending in a direction different from the first extension part. The second protrusion part includes a first extension part, and a second extension part extending in a direction different from the first extension part. The first extension parts are disposed parallel to an optical axis of the image sensor. The second extension part of the first protrusion part is closer to the second extension part of the second protrusion part than to the first extension part of the second protrusion part.