Electromagnetic Shield for Imaging Unit Noise Reduction
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Solution Overview
Problem
Existing printing apparatuses face degradation in calculation accuracy of medium transportation due to noise interference from electromagnetic waves through electrical transmission lines, affecting the accuracy of template matching processes.
Innovation Solution
Incorporating an electromagnetic shield to cover the imaging element, image processing unit, and electrical transmission line, along with a thermal insulation member and a cooling fan to prevent noise and heat transfer, thereby maintaining the accuracy of medium transportation calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the imaging device and control device are connected via electrical transmission lines outside the support base, then electrical connection is achieved, but noise such as electromagnetic waves enters the transmission lines and degrades calculation accuracy of the transportation amount
Solution Approach 1:
The patent introduces a cable shield as an intermediary component between the imaging device and control device. This shield acts as a mediator that blocks electromagnetic waves from entering the electrical transmission lines, thereby protecting the signal transmission from noise interference while maintaining the necessary electrical connection.
Solution Approach 2:
The patent converts the harmful electromagnetic waves into a beneficial shielding effect by using conductive materials for the cable shield. The shield itself generates electromagnetic fields that cancel out external electromagnetic interference, turning the potential harm into a protective mechanism that improves calculation accuracy.
2Device complexity
If the imaging unit and image processing unit are disposed close to each other for compact design, then device complexity is reduced, but heat generated from the image processing unit transfers to the imaging unit and may affect imaging accuracy
Solution Approach 1:
The patent divides the imaging device into functionally independent modules: the imaging unit and the image processing unit. By segmenting these components and providing separate mounting structures with thermal insulation, the patent allows each module to be optimized independently while maintaining compact overall design through coordinated arrangement.
Solution Approach 2:
The patent introduces thermal insulation members as intermediary components between the imaging unit and image processing unit. These insulators act as mediators that block heat transfer from the high-temperature image processing unit to the temperature-sensitive imaging unit, enabling close proximity mounting without thermal interference.
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 solution effectively reduces noise interference and heat transfer, enhancing the accuracy of medium transportation calculations and preventing temperature increases in the imaging unit, thus improving the overall performance of the printing apparatus.
Implementation Method 1
an electromagnetic shield that covers the imaging element, the image processing unit, and the electrical transmission line
Implementation Method 2
a thermal insulation member which partitions the imaging element and the image processing unit is disposed between the imaging unit and the image processing unit
Data Source
AI summary
An imaging device includes an imaging unit that includes an imaging element for imaging a lower surface of continuous forms paper, an image processing unit that image-processes an image of the lower surface of the continuous forms paper captured by the imaging unit, a cable that electrically connects the imaging unit and the image processing unit with each other, and an electric box that covers the imaging element, the image processing unit, and the cable and functions as an electromagnetic shield.