Wireless Communication Board Magnetic Sheet Interference Suppression
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Solution Overview
Problem
Image forming apparatuses face challenges with interference waves from metal frames, which can deteriorate wireless communication sensitivity and cause malfunctions due to miniaturization of semiconductor integrated circuits.
Innovation Solution
The solution involves attaching a magnetic sheet with a magnetic layer containing metal powder to the wireless communication board, ensuring that the region of the magnetic sheet overlaps with the antenna region in the thickness direction, to suppress interference waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic sheet is attached to the entire surface of the wireless communication board to suppress interference waves, then the resistance to interference waves is improved, but the manufacturing cost increases
Solution Approach 1:
The magnetic sheet is attached only to the specific region of the wireless communication board where interference waves are most problematic, rather than covering the entire surface. This localized approach maintains the interference suppression effect while reducing the amount of magnetic sheet material required, thereby lowering manufacturing costs.
Solution Approach 2:
The wireless communication board is divided into different regions, with the magnetic sheet applied selectively to the region most susceptible to interference waves. This segmentation allows for targeted interference suppression without the need to treat the entire board surface, optimizing both performance and cost.
2Use of energy by moving object
If the wireless communication board is miniaturized to achieve high-speed operation and low power consumption, then energy efficiency is improved, but the resistance to interference waves deteriorates
Solution Approach 1:
A magnetic sheet is introduced as an intermediary element between the wireless communication board and the interference waves. This magnetic sheet absorbs or shields the interference waves, protecting the miniaturized wireless communication board from their harmful effects while allowing the board to maintain its energy-efficient design.
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 the impact of interference waves on the wireless communication board, enhancing communication quality and stability while maintaining low manufacturing costs.
Implementation Method 1
a magnetic sheet including a magnetic layer containing metal powder
Data Source
AI summary
An image forming apparatus includes a wireless communication board on which a communication circuit that wirelessly communicates image data with an external device is mounted. The wireless communication board includes a first surface to which a magnetic sheet including a magnetic layer containing metal powder is. The wireless communication board also includes an antenna provided on a second surface opposite to the first surface of the wireless communication board. The antenna is used by the communication circuit to transmit and receive wireless radio waves. A region of the magnetic sheet on the first surface and a region of the antenna on the second surface overlap with each other in a thickness direction of the wireless communication board.