Ambient Light System for Sleep and Cognition via Green Spectral Control
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Solution Overview
Problem
Current phototherapy methods and devices are inadequate in improving sleep efficiency and addressing affective disorders and psychological conditions, as they fail to provide desirable illumination characteristics.
Innovation Solution
A light system with an emitting device providing at least 30% green light spectral component, configured to emit light with a horizontal illuminance of 2200 lux to 2800 lux, and a controller to adjust the light's angle and intensity, ensuring exposure to ambient lighting with a 45-degree angle and optimal illuminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phototherapy methods are used, then light therapy can be provided, but sleep efficiency and psychological disorder improvement are insufficient
Solution Approach 1:
The patent changes the spectral composition parameter by requiring at least 30% green light (495-560 nm), specific illuminance (2200-2800 lux), and viewing angle (45 degrees) to resolve the contradiction between providing light therapy and achieving satisfactory sleep efficiency improvement. Conventional phototherapy used broader or different spectral ranges that were less effective for circadian rhythm regulation.
2Illumination intensity
If high intensity light is used for phototherapy, then light exposure is sufficient, but harmful effects on vision may occur
Solution Approach 1:
The patent applies local quality by specifying precise spectral distribution within the visible range, particularly emphasizing green light components (495-560 nm) that effectively stimulate melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGCs) without the harmful effects associated with high-intensity blue light. The controlled spectral quality enables therapeutic intensity while protecting vision.
Solution Approach 2:
The patent changes the spectral parameter by limiting blue light content and emphasizing green light (at least 30% of total spectrum), which shifts the effective wavelength range for circadian regulation away from the most vision-damaging portion of the spectrum while maintaining sufficient illuminance (2200-2800 lux) for therapeutic effect.
3Illumination intensity
If conventional light spectrum is used, then general illumination is provided, but circadian rhythm regulation is insufficient
Solution Approach 1:
The patent transforms general illumination into circadian-regulating light by changing the spectral composition parameter to include at least 30% green light (495-560 nm) and controlling the illuminance (2200-2800 lux). This specific spectral configuration optimally stimulates ipRGCs and melanopsin, which are the key photoreceptors for circadian rhythm regulation, thereby resolving the contradiction between providing general illumination and achieving effective circadian rhythm improvement.
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 significantly improves sleeping quality, cognitive function, and neurological disorders without affecting vision, demonstrating enhanced sleep efficiency and reduced symptoms of depression and anxiety.
Implementation Method 1
The emitting device is configured to provide a light impinging on a subject in the ambient environment. The light provided by the emitting device has at least 30% green. A line extending from the emitting device to the subject and a plane at eye level of the subject in the ambient environment forms an angle of about 45 degrees. The light has a horizontal illuminance of about 2200 lux to about 2800 lux.
Data Source
AI summary
Alight system used in an ambient environment is provided. The light system comprises an emitting device and a controller coupled to the emitting device. The emitting device is configured to provide a light impinging on a subject in the ambient environment. The controller is configured to control the emitting device. The light provided by the emitting device has at least 30% green light. A line extending from the emitting device to the subject and a plane at eye level of the subject in the ambient environment forms an angle of about 45 degrees. The light has a horizontal illuminance of about 2200 lux to about 2800 lux.