Priority-Based Circadian Lighting Control for Shared Zones
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Solution Overview
Problem
Existing illumination systems for multiple individuals face high energy consumption due to the need for producing bright light tailored to individual circadian rhythms, which is not efficiently managed, leading to potential overexposure and inefficiency.
Innovation Solution
An illumination system that identifies individuals in a zone, assigns priorities based on target light profiles, and adjusts light intensity and color temperature to meet the highest priority while considering actual exposure and future activities, ensuring energy-efficient alignment with individual needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If bright light is produced to expose individuals to their specific circadian needs, then the circadian stimulus effect is improved, but energy consumption increases
Solution Approach 1:
The illumination system provides different light characteristics (intensity, color temperature, circadian stimulus) to different individuals or zones based on their specific circadian needs, rather than uniform illumination. This allows targeted circadian stimulation where needed while reducing light output elsewhere, resolving the contradiction between effective circadian exposure and energy consumption.
Solution Approach 2:
The system dynamically adjusts illumination parameters (intensity, color temperature, circadian stimulus) in real-time based on individual needs, time of day, and cumulative exposure tracking. This dynamic adaptation ensures optimal circadian stimulation is provided only when and where needed, preventing energy waste from static over-illumination.
2Adaptability or versatility
If light exposure is increased for multiple individuals, then circadian alignment is improved, but energy consumption scales linearly with brightness
Solution Approach 1:
The system merges multiple individual light profiles into a collective zone-level control strategy. By evaluating cumulative exposure and prioritizing individuals systematically, the system provides coordinated circadian support to multiple people simultaneously at optimized energy levels, rather than independently maximizing light for each individual.
Solution Approach 2:
The system continuously tracks cumulative light exposure for each individual over time and adjusts illumination accordingly. This continuous adaptation ensures that circadian support is provided efficiently across multiple individuals throughout the day, maintaining effectiveness while avoiding redundant energy consumption from repeated over-exposure.
3Use of energy by moving object
If priority-based control is implemented for multiple individuals, then energy efficiency is improved, but system complexity increases
Solution Approach 1:
The system pre-establishes priority rules and evaluation criteria for multiple individuals before implementation. By defining the control logic and priority framework in advance, the system reduces real-time computational complexity while maintaining energy-efficient priority-based illumination control across multiple users.
Data Source
AI summary
The present inventive concept relates to an illumination system and a method for controlling an illumination system configured to illuminate a zone, the illumination system being further configured to serve a plurality of individuals. The method comprising: identifying one or more individuals of the plurality of individuals present in the zone; for each individual present in the zone, obtaining a respective target light profile, each target light profile comprising time-resolved information about circadian stimuli and color temperatures of light that the respective individual is to be exposed to; assigning a priority to each individual of the plurality of individuals present in the zone based on the respective target light profile; determining a proportion of the plurality of individuals present in the zone; and upon the proportion of the plurality of individuals present in the zone is equal to or above a threshold: controlling the illumination system such that a circadian stimulus of light illuminating the zone is higher than a circadian stimulus of the target light profile associated with the individual having a highest assigned priority.