Single Prong Headset Plug with Four Signal Regions for Detection
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Solution Overview
Problem
Portable electronic devices lack the ability to handle additional signals beyond audio signals using existing single prong headset plugs, and there is a need for plug detection circuitry to differentiate between types of plugs and detect user-activated functions.
Innovation Solution
A single prong plug with four signal conducting regions, including a microphone region and two audio regions, and detection circuitry that determines the type of plug inserted and detects user-activated functions by providing signals to the device's processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single prong plug is used for audio signals, then the device structure is simple, but the ability to handle additional signals (such as microphone signals) is limited
Solution Approach 1:
The plug is divided into multiple electrically isolated signal conducting regions along a single prong, including a first audio signal region, a second audio signal region, a microphone signal region, and a ground region. This segmentation allows each region to handle different signals independently while maintaining a unified single-prong structure, thereby increasing signal handling capability without significantly increasing structural complexity.
2Adaptability or versatility
If a double prong plug is used to handle additional signals, then the signal handling capability is improved, but the jack occupies more valuable real estate in the media device
Solution Approach 1:
Multiple signal conducting regions (first audio signal, second audio signal, microphone signal, and ground) are merged into a single integrated plug structure. This consolidation allows the jack to maintain a compact footprint while supporting multiple signal types, thereby improving signal handling capability without increasing the space occupied by the jack in the media device.
3Adaptability or versatility
If plug detection circuitry is added to detect plug type and user functions, then the functionality is enhanced, but the device complexity increases
Solution Approach 1:
The detection circuitry is designed to perform multiple functions: detecting whether a plug is inserted, identifying the type of plug (headset with microphone or stereo headphones), and detecting user-activated functions on the headset. This multi-functional design allows a single detection system to handle various detection tasks, thereby enhancing plug detection capability while minimizing the increase in device complexity.
Data Source
AI summary
A single prong, multiple signal conducting plug and plug detection circuitry is provided. The plug may be electrically coupled to a stereo headset including a microphone. The plug may include four signal conducting regions arranged in a predetermined order along the length of the prong. Detection circuitry may be operative to determine whether a microphone type of plug (e.g., a four region plug including a microphone region and two audio regions, or a three region plug including microphone region and only one audio region) or a non-microphone type of plug (e.g., stereo plug) is inserted into the jack of an electronic device (e.g., mobile phone). Detection circuitry may also detect user activated functions performed in response to user activation of one or more switches included with the headset. For example, the headset may include a single switch for performing a function with respect to a microphone (e.g., end-call function).