Camera Actuator FPC Through-Hole Wiring for Shake Correction
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Solution Overview
Problem
Existing camera modules with shake correction functions face difficulties in efficient electrical connections, particularly in sensor shift mechanisms, which hinder effective power supply wiring for image sensor movement.
Innovation Solution
An actuator design incorporating a sensor substrate with an image sensor, a coil substrate for driving the image sensor, and a Flexible Printed Circuit (FPC) with through holes for efficient electrical connection, allowing direct power supply to the image sensor and coil substrate, along with a lens driving mechanism and image sensor driving device for camera shake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric wire is wound from mounting substrate to camera shake prevention structure and autofocus structure, then electrical connection can be established, but wiring efficiency is poor and connection is difficult
Solution Approach 1:
The patent divides the electrical connection system into separate functional components: FPC for power supply, coil substrate for driving current, and sensor substrate for signal output. This segmentation allows each component to have optimized wiring paths, eliminating the complex wound wire configuration and improving both manufacturing efficiency and connection reliability.
Solution Approach 2:
The FPC acts as an intermediary carrier that brings power supply wires directly to the coil substrate and sensor substrate through through-holes. This intermediary structure replaces the indirect wound wire path with a direct routing mechanism, significantly improving wiring efficiency while maintaining reliable electrical connections.
2Ease of manufacture
If mounting substrate is disposed at rearmost portion of case, then image sensor can be mounted, but electrical connection becomes inefficient
Solution Approach 1:
The patent transitions from a planar mounting approach to a three-dimensional configuration where the FPC extends through the case thickness direction. The through-holes in the FPC allow wires to pass directly through the case structure, creating a vertical wiring path that resolves the conflict between rear-mounted sensor placement and efficient electrical connection.
Solution Approach 2:
The FPC serves multiple functions simultaneously: it provides structural support for mounting the sensor substrate, creates through-holes for wire routing, and acts as the electrical connection medium. This multi-functionality eliminates the need for separate mounting and wiring operations, improving both manufacturing ease and connection efficiency.
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
Enhances power supply wiring efficiency for camera shake correction mechanisms, reduces the risk of suspension wire damage, and enables precise three-axis movement control of the image sensor with high accuracy.
Implementation Method 1
a coil substrate (50) that has a coil (510) for driving the image sensor (2)
Data Source
AI summary
An actuator is disclosed having a sensor substrate, a coil substrate and an FPC. The sensor substrate includes an image sensor on a front surface thereof. The coil substrate includes a coil for driving the image sensor and is provided with a first through hole. The FPC includes a main body portion and a coupling portion extending from a periphery of the main body portion and is coupled to an outside element. The main body portion is provided with a second through hole. The sensor substrate is fixed to the main body portion from a rear side, the coil substrate is fixed to the main body portion from a front side, and the image sensor is exposed to a front surface through the first through hole and the second through hole.