Camera Sensor Driving Substrate Layout for Compact Low-Power Modules
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Solution Overview
Problem
Existing camera modules face challenges in reducing the size of sensor driving devices and minimizing power consumption, particularly for autofocus and image stabilization functions.
Innovation Solution
A sensor driving device comprising a first substrate and a second substrate, where the second substrate has protrusion parts with extension parts that allow for a compact design and efficient electrical connection, thereby reducing size and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sensor driving device uses a conventional substrate design, then the electrical connection is reliable, but the device size is large
Solution Approach 1:
The second substrate is disposed on the first substrate in a nested arrangement, with the second substrate containing protrusion parts that extend toward the first substrate. This nesting approach allows electrical connections to be made while minimizing the overall footprint of the sensor driving device, thereby reducing device size without compromising connection reliability.
Solution Approach 2:
The protrusion parts of the second substrate extend in multiple directions (first direction and second direction perpendicular to the first), utilizing three-dimensional space rather than a flat two-dimensional layout. This dimensional approach allows electrical connections to be established with shorter trace lengths and reduces the lateral spread of the substrate structure, thus reducing device size.
2Volume of moving object
If the sensor driving device uses a compact design, then the device size is reduced, but the power consumption increases
Solution Approach 1:
By utilizing vertical stacking (second substrate on first substrate) and multi-directional protrusion parts, the design achieves compactness without requiring long lateral electrical traces. The electrical connections are made through vertically oriented paths and perpendicular extensions, which minimize trace length and associated resistive power losses, thus reducing power consumption while maintaining small device size.
3Ease of manufacture
If the substrate uses simple extension parts, then the manufacturing is easy, but the electrical connection efficiency is low
Solution Approach 1:
The protrusion parts extend in two perpendicular directions (first direction along the optical axis and second direction perpendicular to it), creating a three-dimensional connection path. This multi-directional extension allows electrical traces to reach corresponding pads on the first substrate more efficiently, improving electrical connection efficiency while maintaining manufacturability through standard PCB routing techniques.
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.