Earphone Connection Recognition via Resistance Detection

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Solution Overview

Problem

Existing earphone systems struggle to reliably detect and support audio signal processing when abnormalities, such as short-circuits, occur in the earphone device, particularly due to the physical weakness of ear-speaker structures, leading to incomplete connection recognition and potential malfunction.

Innovation Solution

Incorporating a device recognition element with a specific resistance value in the earphone device or portable terminal, which ensures stable connection recognition and audio signal processing even with partial malfunctions, using terminal connectors, a recognition connector, distribution resistor, and a comparator to determine the earphone device's connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ear-speakers are used in the earphone device, then audio output functionality is improved, but structural strength and reliability deteriorate due to the narrow and long wire connections

Engineering Contradiction:

Improveconnection recognition reliabilityVSAvoidstructural strength of ear-speaker connections

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent divides the connection recognition function into multiple independent detection paths. Instead of relying on a single detection method that requires both ear-speakers to be functional, the system segments the recognition process into: (1) detecting electrical connection status of each ear-speaker separately, and (2) detecting mechanical insertion status independently. This segmentation allows the system to recognize earphone connection even when one ear-speaker is abnormal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements excessive detection by adding redundant detection mechanisms beyond the basic connection check. The system not only detects whether ear-speakers are electrically connected but also detects mechanical insertion status separately. This partial or excessive action ensures that even if one detection path fails due to ear-speaker abnormality, the other detection path can still confirm connection status.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If a pair of ear-speakers are used for high quality audio, then audio quality is improved, but the physical weakness of narrow and long wire connections leads to frequent malfunctions

Engineering Contradiction:

Improveaudio signal processing reliabilityVSAvoidimpact susceptibility of ear-speaker wires

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary detection mechanism (the controller's dual detection system) that mediates between the physical ear-speaker connections and the audio signal processing. The controller acts as an intermediary that can identify connection status through multiple independent detection methods, thereby protecting the audio signal processing from being affected by ear-speaker physical abnormalities.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the earphone device structure is made physically weak with narrow and long wires, then ease of insertion and wearability is improved, but susceptibility to impact and malfunction increases

Engineering Contradiction:

Improveease of earphone insertion and wearingVSAvoidresistance to impact and malfunction

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements beforehand cushioning by preparing compensatory detection mechanisms in advance. The system is designed with redundant detection capabilities that can compensate for potential ear-speaker failures before they occur. When impact or malfunction happens, the pre-established alternative detection paths can immediately take over to maintain connection recognition functionality.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 stable and secure recognition of the earphone device connection, ensuring normal audio signal processing and functionality even if abnormalities occur, enhancing user experience and reducing costs associated with high-quality earphone device failures.

Implementation Method 1

Incorporating a device recognition element with a specific resistance value in the earphone device or portable terminal, which ensures stable connection recognition and audio signal processing

Methodology Applied

Scientific EffectElectrical Resistance: Electrical Resistance

Implementation Method 2

using terminal connectors, a recognition connector, distribution resistor, and a comparator to determine the earphone device's connection

Methodology Applied

Scientific EffectElectrical signal comparison: Ohm's Law

Data Source

PatentUS9426557B2Earphone system, earphone device, and portable terminal for supporting the same

Publication Date: 2016.08.23 SAMSUNG ELECTRONICS CO LTD

AI summary

An earphone device, a portable terminal and an earphone system are provided. The earphone system includes a portable terminal having an earphone interface, an earphone device electrically connectable to the earphone interface, and at least one device recognition element which is disposed in at least one of the earphone interface and the earphone device and which provides a certain resistance value when the earphone device is electrically connected to the earphone interface so that the portable terminal determines that the earphone device is electrically connected to the earphone interface.