Smart Switch Neutral Detection for Stable No-Neutral Operation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless AC load control devices require a neutral wire for proper functionality, but many older structures lack this infrastructure, leading to insufficient or unstable power delivery to electrical loads.

Innovation Solution

The development of an AC controlling device that can modify its functionality based on the presence or absence of a neutral wire, allowing it to connect to both grounded and ungrounded conductors, and adjust its power delivery and feature set accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wireless AC load control devices are connected to AC power supply via neutral wire, then proper functionality and stable power delivery are achieved, but compatibility with older structures without neutral wire infrastructure is lost

Engineering Contradiction:

Improvestable power deliveryVSAvoidcompatibility with older structures

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The device dynamically adapts its operational mode based on the presence or absence of a neutral wire connection. When a neutral wire is detected, the device operates in full functionality mode with stable power delivery. When no neutral wire is present, the device switches to an alternative mode that maintains basic functionality while accommodating the limited wiring infrastructure of older structures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device changes its electrical connection parameters and operational characteristics based on the detected wiring configuration. By monitoring the presence of neutral wire connection and adjusting its power delivery parameters accordingly, the device can function reliably in both modern installations with neutral wires and older installations without them.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If advanced features such as capacitive sensing, temperature sensing, radiation sensing, audio sensing, and wireless communications are enabled, then device functionality is improved, but power consumption increases

Engineering Contradiction:

Improvedevice functionalityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The device implements advanced sensing and communication features partially or selectively based on available power and user needs. Rather than enabling all advanced features continuously, the system activates them as needed or when sufficient power is available, reducing overall power consumption while maintaining the capability to provide enhanced functionality when appropriate.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250155907A1Smart switch with functionalities determined based on a grounded conductor connection

Publication Date: 2025.05.15 ROKU INC

AI summary

Disclosed herein are system, apparatus, article of manufacture, method, and computer program product embodiments for modifying the functionality of an alternating current (AC) controlling device. An example computer-implemented method includes determining whether an electrical terminal of an AC controlling device is connected to a grounded conductor. In response to determining that the electrical terminal is connected to the grounded conductor, the example computer-implemented method includes generating a first control signal configured to permit the AC controlling device to perform a function. In response to determining that the electrical terminal is not connected to the grounded conductor, the example computer-implemented method includes generating a second control signal configured to prevent the AC controlling device from performing the function.