Earpiece Charging Contact Detection Without Battery Power

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Solution Overview

Problem

Existing earpiece charging systems fail to accurately detect when an earpiece is properly docked in its charging case, especially when the power sources in the earpiece or case are depleted, leading to issues like unwanted noise and inefficient battery preservation.

Innovation Solution

A detection circuit is implemented in both the earpiece and the case, utilizing electrical contacts to determine if the earpiece is in the charging configuration, even without power, by altering voltage paths or using boost converters, allowing for proper docking detection and enabling actions like disabling functionality or indicating charge states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If power sources in the earpiece or case are depleted, then the system cannot perform normal charging operations, but existing systems fail to detect docking status accurately leading to unwanted noise and inefficient battery preservation

Engineering Contradiction:

Improvedocking detection accuracyVSAvoidpower source depletion

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary docking detection using the detection circuit before attempting any power-related operations. The detection circuit checks for the presence of the earpiece in the charging case using electrical contacts and voltage path analysis, enabling the system to prepare appropriate actions (such as disabling functionality or indicating charge states) before power transfer begins, thus ensuring reliable detection even when power sources are depleted

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces power-dependent detection methods with a mechanical/electrical contact-based detection system. The detection circuit uses physical electrical contacts between the charging case and earpiece to establish voltage paths, allowing docking status detection through electrical continuity rather than through power source status, thereby enabling reliable detection independent of power availability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If the detection circuit uses electrical contacts and voltage path alteration, then accurate docking detection is achieved even without power, but the system complexity increases

Engineering Contradiction:

Improvedocking detection accuracyVSAvoiddetection circuit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The detection circuit is designed to serve multiple functions: it detects docking status, determines charging case presence, and enables subsequent charging operations. By integrating these functions into a single circuit that uses electrical contacts and voltage path analysis, the patent reduces overall system complexity while maintaining reliable detection across different power scenarios

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The detection circuit utilizes the existing electrical contacts and power paths required for charging operations to perform detection functions. The same electrical contacts used for power transfer also serve as sensing elements for docking detection, allowing the system to detect docking status using resources already present in the charging system without requiring separate dedicated detection hardware

Inventive Principle:

Principle #25Self-service

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 solution ensures accurate detection of earpiece docking, preventing noise issues and optimizing power usage by enabling automatic shutdown and intelligent charging decisions, even when power sources are depleted.

Implementation Method 1

A detection circuit, located in part in the earpiece and in part in the case, comprises at least one earpiece electrical contact that is configured to electrically couple to at least one case electrical contact when the earpiece is interfaced with the case

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

The detection circuit comprises circuitry in the earpiece that is configured to detect when the earpiece is interfaced with the case in the earpiece power source charging configuration. The earpiece further comprises circuitry that is configured to disable predetermined earpiece functionality after the detection circuitry in the earpiece detects when the earpiece is interfaced with the case

Methodology Applied

Scientific EffectVoltage division: Electrical Resistance

Data Source

PatentUS11791643B2Earpiece charging case detection

Publication Date: 2023.10.17 BOSE CORP

AI summary

A system with an earpiece that comprises a rechargeable earpiece power source and a case that is configured to interface with the earpiece in an earpiece power source charging configuration and comprises a case power source that is configured to recharge the earpiece power source. A detection circuit, located in part in the earpiece and in part in the case, includes at least one earpiece electrical contact that is configured to electrically couple to at least one case electrical contact when the earpiece is interfaced with the case in the earpiece power source charging configuration. The detection circuit is configured to detect, using the earpiece and case electrical contacts, whether the earpiece is interfaced with the case in the earpiece power source charging configuration, even if one of the earpiece power source and the case power source does not have power.