Human-Centric Lighting Control Using EEG and Ambient Light Feedback

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Solution Overview

Problem

Existing human-centric lighting systems lack the ability to accurately adjust lighting parameters to influence human emotions effectively due to the high cost and limitations of using functional Magnetic Resonance Imaging (fMRI) systems and electroencephalogram (EEG) methods, which are either too expensive or unreliable for commercial applications.

Innovation Solution

A system and method that uses fMRI to determine the correlation between light spectrum and emotional responses, establishing a database of effective Correlated Color Temperatures (CCT) for specific emotions, and then employs EEG to infer emotional states, allowing for a cost-effective, intelligent lighting system that adjusts parameters like CCT, equivalent melanopic illuminance, and circadian action factor to enhance emotional responses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If fMRI systems are used to determine emotional responses for lighting control, then measurement precision of emotional states is improved, but device complexity and cost increase significantly

Engineering Contradiction:

Improveemotional state detection accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses EEG to copy or replicate the emotional state measurement capability of fMRI. Instead of directly using the complex and expensive fMRI system, the invention creates a simplified copy through EEG-based emotional inference that achieves comparable functional results for lighting control applications

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces the expensive, complex, and resource-intensive fMRI system with a cheaper, more portable, and practical alternative - EEG technology. This substitution enables widespread commercial deployment while maintaining the core functionality of emotional state detection for human-centric lighting

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Device complexity

If EEG is used to determine emotional states, then device complexity is reduced, but measurement precision and reliability decrease

Engineering Contradiction:

Improvesystem complexityVSAvoidemotional state detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces an intermediary element - a database of effective Correlated Color Temperatures (CCT) for specific emotions - that bridges the gap between EEG measurements and accurate emotional state determination. This intermediary database enhances the reliability of EEG-based emotional detection by providing reference data for comparison and inference

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the direct, expensive fMRI measurement mechanism with an indirect but more practical approach using EEG combined with computational inference and database lookup. This substitution maintains measurement precision while dramatically reducing system complexity and cost

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If lighting parameters are adjusted based on emotional states, then human well-being is improved, but system complexity increases

Engineering Contradiction:

Improveemotional support effectivenessVSAvoidlighting system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes the lighting system universal by integrating multiple functions into a single system: emotional state detection via EEG, emotional inference using database lookup, and adaptive lighting parameter adjustment. This multi-functionality achieves reliable emotional support while avoiding the need for separate complex systems for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements emotional support by dynamically changing lighting parameters such as Correlated Color Temperature (CCT) and illuminance levels based on detected emotional states. This parameter adjustment approach provides effective emotional support through a relatively simple control mechanism that responds to EEG-based emotional inference

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250374402A1Intelligent human centric lighting system with ambient light monitoring of lighting site environment

Publication Date: 2025.12.04 LIN LAWRENCE

AI summary

A system for automatically adjusting the lighting parameters of a space is disclosed herein. The control module sets the target lighting parameters in the space and drive the smart lamp groups to illuminate by using the preset light recipe and to control the smart lamp groups to perform the illumination. The control module compares an ambient light detection value in the actual environment with the target value. When the ambient light detection value is not the same as the target value, the control module drives the ambient light sensor module performs a dimming procedure to the smart lamp groups. Wherein, the dimming procedure includes the step of adjusting an illuminance uniformity of the space according to the actual illuminance detected by the ambient light sensor module. After the calculation of the illuminance uniformity formula, the illuminance uniformity is adjusted to be the same as a target illuminance uniformity.