Portable Terminal Ground Unit for Hearing Aid Interference Reduction
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Solution Overview
Problem
Portable terminals generate electromagnetic waves that interfere with hearing aids, necessitating a reduction in electromagnetic wave emission from their periphery to ensure compatibility and minimize malfunctions.
Innovation Solution
A portable terminal design incorporating a ground unit with a first ground portion connected to the antenna and a second ground portion spaced from the receiver, which emits electromagnetic waves in a direction different from the receiver, thereby reducing wave generation at the periphery and minimizing interference with hearing aids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the portable terminal generates electromagnetic waves for communication, then communication function is achieved, but electromagnetic wave interference with hearing aids occurs
Solution Approach 1:
A ground unit is introduced as an intermediary component between the antenna and the hearing aid. The ground unit includes a ground electrode and a capacitor that together form a filtering circuit to block electromagnetic waves from reaching the hearing aid while allowing communication signals to pass through normally.
Solution Approach 2:
The patent converts the harmful electromagnetic waves into a beneficial filtering action. By using the ground unit with capacitor and ground electrode, the electromagnetic waves that would normally cause interference are instead channeled through a circuit that blocks them, transforming the harmful effect into a protective function.
2Object-affected harmful factors
If the ground unit is positioned close to the receiver, then electromagnetic wave blocking is effective, but the terminal body size increases
Solution Approach 1:
The ground electrode is designed as a thin film structure that can be flexibly positioned within the terminal body. This thin film ground electrode provides effective electromagnetic wave blocking without occupying significant space, allowing the ground unit to be integrated into the terminal body with minimal increase in size.
3Object-affected harmful factors
If the ground electrode area is increased, then electromagnetic wave shielding effectiveness improves, but manufacturing complexity increases
Solution Approach 1:
The ground electrode is implemented as a thin film that can be deposited or applied to the interior surfaces of the terminal body. This thin film approach provides effective grounding and electromagnetic wave shielding without requiring complex three-dimensional structures, thereby simplifying the manufacturing process while maintaining shielding effectiveness.
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 design effectively reduces electromagnetic wave interference with hearing aids, ensuring compatibility and compliance with hearing aid compatibility standards by directing waves away from the user's hearing aid.
Implementation Method 1
The second ground portion is configured to emit electromagnetic waves in a second direction away from the first direction
Data Source
AI summary
A portable terminal is provided that has a terminal body, a receiver located in the terminal body, the receiver being oriented in a first direction, and a ground unit located in the terminal body. The ground unit includes a first ground portion connected to the receiver, and a second ground portion connected to the first ground portion at a position on the first ground portion at a distance from the receiver. The second ground portion is configured to emit electromagnetic waves in a second direction away from the first direction.