Magnetic Shield Member Elastic Pressing for Noise Reduction
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Solution Overview
Problem
Existing image pickup apparatuses face issues with increased power consumption and component complexity due to the use of LC filters to smooth driving currents, which also lead to magnetic noise fluctuations affecting image quality, and require additional components like screws and adhesives for magnetic shield installation.
Innovation Solution
An image pickup apparatus with a magnetic shield member held in place by a simple configuration using a fixing member and an elastic dustproof rubber, which surrounds the image pickup element's light receiving plane and presses the magnetic shield member toward the fixing member, eliminating the need for screws and adhesives and reducing magnetic noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an LC filter is used to smooth driving current and reduce magnetic noise, then magnetic noise is reduced, but power consumption increases and heat generation increases
Solution Approach 1:
The patent extracts the magnetic noise shielding function from the electrical signal processing domain (LC filter) and implements it in the physical domain using a magnetic shield member. This separates the noise reduction function from the power-consuming smoothed circuit, eliminating the need for active filtering while maintaining magnetic noise protection.
Solution Approach 2:
The magnetic shield member acts as an intermediary physical barrier between the driving coil and the image pickup element. It mediates the magnetic field interaction by providing a passive shielding effect, avoiding the need for active electrical filtering circuits that consume power.
2Reliability
If a screw and adhesive are used to fix the magnetic shield member, then the magnetic shield member is securely fixed, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent merges the fixing function with the magnetic shield member structure itself. The magnetic shield member is designed with an integrated fixing portion that combines the shielding and fixing functions into a single component, eliminating the need for separate screws and adhesives.
Solution Approach 2:
The magnetic shield member is designed with multi-functionality, serving both as the magnetic noise shield and as its own fixing mechanism. The fixing portion integrated into the magnetic shield member allows it to perform both shielding and securing functions simultaneously.
3Reliability
If a screw is used to fix the magnetic shield member, then the magnetic shield member is securely fixed, but the image pickup apparatus thickens
Solution Approach 1:
The fixing portion is nested within the structure of the magnetic shield member itself, with the fixing protrusion fitting into a corresponding recess. This nested design allows the fixing mechanism to be integrated within the existing component thickness rather than adding external fastening elements.
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 configuration effectively reduces magnetic noise while minimizing component count and assembly complexity, maintaining image quality without increasing power consumption or thickness.
Implementation Method 1
an elastic member arranged between the magnetic shield member and the image pickup element, and configured to press the image pickup element so as to surround a circumference of a light receiving plane of the image pickup element and to press the magnetic shield member toward the fixing member
Data Source
AI summary
An image pickup apparatus includes an image pickup element converting an object image to an electric signal, a magnetic shield member arranged in front of the image pickup element, a fixing member to which the image pickup element and the magnetic shield member are attached, and an elastic member arranged between the magnetic shield member and the image pickup element, and configured to press the image pickup element so as to surround a circumference of a light receiving plane of the image pickup element and to press the magnetic shield member toward the fixing member.