Circadian Lighting Control via Spectral Attenuation
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Solution Overview
Problem
Conventional lighting systems disrupt natural circadian rhythms by emitting blue and green light wavelengths during night hours, leading to melatonin suppression and potential health issues, and existing solutions either compromise light quality or fail to account for individual circadian phases.
Innovation Solution
A system that includes a data receiver unit to assess an individual's circadian state, a circadian state association unit to predict future states, and a lighting command unit to adjust light sources' spectral power distribution, attenuating blue and green light during biological night states while maintaining overall lighting characteristics comparable to unadjusted settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lighting sources are used to illuminate areas where natural light is not readily available, then lighting coverage and availability are improved, but the natural circadian cycle of individuals is interrupted
Solution Approach 1:
The patent changes the spectral parameters of artificial light by attenuating blue and green wavelengths (480-560 nm) during nighttime hours while maintaining other lighting parameters. This parameter modification allows artificial lighting to provide necessary illumination coverage without the harmful circadian disruption caused by conventional full-spectrum lighting sources.
2Object-affected harmful factors
If blue and green light wavelengths are attenuated during biological night states, then circadian rhythm health is improved, but overall lighting quality may be compromised
Solution Approach 1:
The patent applies local quality modification by selectively attenuating only specific wavelength ranges (blue and green light at 480-560 nm) while leaving other wavelengths unchanged. This localized spectral modification preserves the overall lighting quality and visual functionality while eliminating the harmful circadian-disrupting components, achieving both health benefits and maintained light quality.
3Object-affected harmful factors
If lighting systems are adjusted to account for individual circadian phases, then health outcomes are improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-defining circadian states (daytime, evening, nighttime, early morning) with associated timestamp ranges and lighting parameters. This preliminary structuring allows the system to automatically determine appropriate lighting adjustments based on current time and state without requiring complex real-time analysis, thereby simplifying the control system while still achieving personalized circadian health benefits.
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
The system effectively reduces circadian disruption by minimizing blue and green light exposure during night hours, promoting healthier melatonin secretion and circadian rhythm entrainment without compromising light quality or intensity.
Implementation Method 1
Light sources may include both natural lighting (e.g., sunlight) and artificial light sources (e.g., light fixtures, emergency lighting, floodlights). Artificial light may be provided by various technologies, such as light-emitting diodes (LEDs), incandescent lights, tungsten lights, etc.
Implementation Method 2
light emitted in the circadian active wavelength range affects melatonin secretion in the individual
Data Source
AI summary
Systems and methods for controlling environmental illumination relative to circadian function of individuals are provided. A method is provided for controlling the operation of light sources by assigning a circadian state to the individual based on received electronic information, extrapolating future circadian states based on the assigned circadian state, the assigned circadian state or the extrapolated future circadian states including at least a biological night state, and encoding machine-level control commands that control the operation of the light source for transmission to the light sources adapted for the biological night state by having circadian-significant attenuation along the circadian active wavelength range.