Mobile Terminal HAC System Using Detachable Coil Accessory
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Solution Overview
Problem
The increasing screen occupation ratio in mobile phones has led to a loss of dedicated design space, making it inconvenient for people with hearing disabilities to use mobile phones with hearing aid compatibility (HAC) features, as prior art requires additional components that occupy valuable space.
Innovation Solution
A mobile-terminal based HAC system that includes a coil accessory with a magnetic induction coil connected to an audio plug, integrated into a mobile terminal with a main board and audio interface circuit, allowing for a detachable connection that enables HAC functionality without occupying additional design space, using a mode-switching mechanism to drive either an earphone or the magnetic induction coil based on inserted accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional inductive coil is added as an antenna to achieve HAC functionality, then hearing aid compatibility is improved, but the screen occupation ratio decreases and design space is reduced
Solution Approach 1:
The patent divides the HAC functionality into a separate detachable coil accessory rather than integrating it into the mobile phone body. This segmentation allows the phone to maintain full-screen design while users can attach the coil accessory when hearing aid compatibility is needed.
Solution Approach 2:
The audio jack is designed to support multiple functions: it can accommodate both traditional earphones and the specialized coil accessory. This multi-functionality allows the same interface to serve different purposes without requiring additional dedicated space for HAC features.
2Reliability
If a dedicated HAC receiver with inductive coil is integrated into the mobile phone, then magnetic field generation for hearing aids is improved, but the device complexity and design space are reduced
Solution Approach 1:
The inductive coil component is extracted from the mobile phone body and placed in a separate detachable accessory. This extraction eliminates the need for dedicated HAC design space within the phone while maintaining the magnetic field generation capability when the accessory is attached.
Solution Approach 2:
The audio jack serves as an intermediary connection point between the mobile phone and the coil accessory. It enables the phone to interface with hearing aids through the external coil without requiring the coil to be integrated into the phone's internal structure.
3Area of moving object
If the audio jack is used to connect the coil accessory, then HAC functionality is achieved without additional design space, but the audio interface circuit must handle multiple signal types
Solution Approach 1:
The audio interface circuit is designed to dynamically adapt its behavior based on the type of accessory connected. Through detection mechanisms, the circuit automatically switches between earphone mode and coil accessory mode, handling different signal types (audio signals vs. coil driving signals) appropriately without requiring separate dedicated circuits for each function.
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
Enables hearing aid compatibility without compromising the screen occupation ratio, allowing full-screen mobile phones to support HAC functions, reducing environmental noise and maintaining normal usage functionality.
Implementation Method 1
magnetic field generated by the induction coil in the phone can be picked up by the hearing aid and converted into an amplified electrical signal
Data Source
AI summary
Disclosed in the present invention are a mobile terminal-based HAC system and an implementation method thereof. The mobile terminal-based HAC system comprises a mobile terminal and a coil accessory; the coil accessory comprises an audio plug and a magnetic induction coil connected to the audio plug; the mobile terminal comprises a mobile terminal body, a main board, an audio interface circuit and an audio jack, the main board and the audio interface circuit are provided in the mobile terminal body, the audio jack is formed on a side edge of the mobile terminal body, and the main board, the audio interface circuit, and the audio jack are connected in sequence.