Day Night Switchable Light Adjusting Device Melatonin Suppression
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Solution Overview
Problem
Conventional lighting devices emit white light containing blue and cyan regions, which decrease melatonin levels, affecting sleep and wake cycles, particularly for night workers who need to remain awake.
Innovation Solution
A day/night switchable light adjusting device comprising panels with specific lighting units emitting different wavelength lights, a control unit adjusting light intensity based on day/night variations, and reflecting surfaces to mix and reflect lights, reducing blue or cyan light intensity at night.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white light source is used in conventional lighting devices, then the lighting provides full spectrum illumination, but the blue and cyan region light decreases melatonin levels
Solution Approach 1:
The lighting device is segmented into multiple independent lighting units, each emitting a specific wavelength range. Instead of using a single white light source, the patent divides the illumination into separate blue/cyan region units and other wavelength units, allowing independent control of each segment to prevent melatonin suppression while maintaining full spectrum illumination capability.
Solution Approach 2:
Different regions of the lighting device are assigned different spectral characteristics. The patent applies local quality by making specific lighting units emit blue/cyan light only when needed (daytime), while other units provide continuous illumination, creating spatial and temporal variation in light quality to avoid harmful melatonin suppression.
2Object-affected harmful factors
If blue and cyan region light is reduced at night to preserve melatonin, then sleep-wake cycles are improved, but lighting effectiveness for night workers must be maintained
Solution Approach 1:
The lighting device dynamically adjusts its spectral composition based on the time of day and user needs. During nighttime, the system automatically reduces or turns off blue/cyan region lighting units while activating other wavelength units, creating a dynamic lighting environment that preserves melatonin production while maintaining sufficient illumination for night workers to remain alert and productive.
Solution Approach 2:
The patent changes the spectral parameters of the emitted light based on time of day. By adjusting the intensity and wavelength distribution of different lighting units, the system transforms the light output from full spectrum during daytime to a modified spectrum at nighttime that excludes harmful blue/cyan wavelengths, thereby preserving melatonin while maintaining productivity.
3Adaptability or versatility
If multiple lighting units with different wavelengths are used, then light spectrum control is improved, but device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by designing a lighting device that can operate in multiple modes using the same physical infrastructure. The multiple lighting units share common control circuitry, power supply, and housing, allowing the system to provide full spectrum illumination during daytime and melatonin-preserving spectrum at nighttime without requiring separate devices for each function.
Solution Approach 2:
The lighting device incorporates automatic control mechanisms that enable it to self-adjust its spectral output based on time of day or ambient light conditions. The system uses sensors and control algorithms to automatically activate or deactivate specific lighting units without requiring manual user intervention, thereby managing the complexity of multiple units through autonomous operation.
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 device effectively adjusts light intensity to minimize melatonin suppression, promoting physiological balance by reducing blue or cyan light during night hours, thus aiding night workers and improving sleep-wake cycles.
Implementation Method 1
The first lighting unit emits a first wavelength light, and each sub lighting unit emits a first sub wavelength light and a second sub wavelength light respectively
Implementation Method 2
the first reflecting surface and the second reflecting surface reflect the first wavelength light and/or the second wavelength light
Implementation Method 3
the first wavelength light, a reflected light of the first wavelength light, the second wavelength light, and a reflected light of the second wavelength light are mixed on the light collecting component
Implementation Method 4
The control unit adjusts the first wavelength light and the second wavelength light with a day/night variation respectively, and the light intensity of the blue region light or the cyan region light is decreased from a day time to a night time
Data Source
AI summary
A day/night switchable light adjusting device and light adjusting method thereof are provided. The day/night switchable light adjusting device is composed of a plurality of panels; each panel includes a reflecting surface and at least one lighting unit. Each lighting unit can emit various wavelength region lights, and the various wavelength lights are mixed on a light collecting component. A control unit is provided for adjusting the various wavelength region lights corresponding to day/night variation. A light intensity of a cyan region light or a blue region light is reduced for preventing an over-inhibition on a quantity of Melatonin.