Visible Power Indicator for Load Control Interfaces

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Solution Overview

Problem

Traditional load control devices are limited in their ability to control advanced electrical loads, lacking the capacity for complex user interactions and providing inadequate feedback to users.

Innovation Solution

A control device equipped with a visual indicator, such as a light bar, that provides feedback on the power delivery to electrical loads, and a control circuit that determines the power level and illuminates corresponding sections of the light bar to indicate the power level.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a traditional mechanical toggle switch is used, then the device structure is simple, but the device cannot provide visible feedback to the user about the operation state

Engineering Contradiction:
Improvefeedback informationVSAvoiddevice structure
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent employs a visual indicator that changes color or illumination state to provide feedback about the operation of the load control device and electrical loads. This allows users to see the current state (on/off/power level) without adding complex mechanical components, resolving the contradiction between providing information and maintaining simplicity.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The patent replaces traditional mechanical feedback mechanisms (such as physical switch positions or mechanical indicators) with electronic visual indicators. This substitution provides richer feedback capabilities while actually reducing mechanical complexity in the system.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If traditional load control devices are used, then the device structure is simple, but the number and types of control functions are limited

Engineering Contradiction:
Improvecontrol functionsVSAvoiddevice structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs a load control device that can control multiple types of electrical loads (lights, appliances, electronics) with a single unified interface. The visual indicator adapts to show different states for different load types, providing versatile control functionality without requiring multiple specialized devices.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements dynamic control capabilities where the device can adjust power delivery levels and provide real-time visual feedback about power consumption. The visual indicator dynamically changes to reflect current operation state, enabling adaptive control that responds to user actions and load conditions.

Inventive Principle:
Principle #15Dynamics

3Loss of information

If no visual indicator is provided, then the device structure is simple, but the user cannot see the power level being delivered to electrical loads

Engineering Contradiction:
Improvepower level informationVSAvoiddevice structure
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent uses a visual indicator that displays different illumination levels or colors to represent different power delivery levels to electrical loads. This provides immediate visual feedback about power consumption without requiring complex display screens or additional sensors.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The visual indicator is integrated into the load control device itself, using the device's existing power supply to illuminate the indicator. This self-powered approach provides information feedback without requiring external power sources or complex additional components.

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

Enhances user interaction and feedback, allowing for more complex control of electrical loads and improving the user experience by providing visible feedback on the operation of the control device and electrical loads.

Implementation Method 1

The visual indicator may be illuminated by a plurality of light sources comprised in the control device

Methodology Applied
Scientific EffectLight emission: Light Emitting Diode

Data Source

PatentEP3973632B1Control device having a visible indicator
Publication Date: 2025.04.16 LUTRON TECHNOLOGY COMPANY LLC
  • EP3973632B1 patent drawingFigure 1
  • EP3973632B1 patent drawingFigure 2
  • EP3973632B1 patent drawingFigure 3

AI summary

A control device configured to control an amount of power delivered to an electrical load may provide feedback regarding the amount of power being delivered to the electrical load. The control device may include a visual indicator that is illuminated by a plurality of light sources. The control device may comprise a control circuit configured to determine the amount of power being delivered to the electrical load and control the light sources to illuminate a portion of the visual indicator to indicate the amount of power being delivered. Different sections of the illuminated portion of the visual indicator may be illuminated to different intensity levels and the intensity levels may be adjusted between different operational states.