Circadian LED Lighting Control for Indoor Myopia Prevention
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Solution Overview
Problem
Conventional lighting units emit light at a constant intensity regardless of day or night, disrupting the circadian rhythm and contributing to the development of myopia, particularly in adolescents who spend extensive time indoors.
Innovation Solution
A myopia prevention lighting apparatus that adjusts illuminance and light composition using a combination of white, blue, and red LEDs, with varying mixing ratios based on day-night cycles to mimic natural light conditions, promoting dopamine secretion during the day and melatonin secretion at night.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional lighting units emit light at constant intensity regardless of day or night, then the lighting provides stable illumination, but the circadian rhythm is disrupted and myopia develops
Solution Approach 1:
The lighting apparatus dynamically adjusts light intensity and spectral composition based on time of day. During daytime, it emits high intensity light (5000-15000 lux) with blue light dominance to stimulate dopamine secretion. During nighttime, it automatically reduces intensity to 500 lux or less and shifts spectrum toward red light to prevent melatonin suppression, thereby resolving the contradiction between stable illumination and circadian rhythm disruption
Solution Approach 2:
The system changes multiple light parameters simultaneously - intensity (lux level), spectral composition (blue vs red light ratio), and duration - according to programmed daytime and nighttime periods. This multi-parameter adjustment enables the lighting to adapt to different temporal conditions, preventing myopia while maintaining appropriate illumination stability for each time period
2Productivity
If students study indoors under conventional lighting, then education continues normally, but retinal light exposure is insufficient and myopia progresses
Solution Approach 1:
The lighting apparatus replicates the beneficial effects of natural sunlight exposure by emitting high intensity light with appropriate spectral composition during daytime study periods. Instead of requiring students to leave indoor environments, the system copies the protective light exposure pattern of natural daylight, providing sufficient retinal stimulation to prevent myopia while allowing continuous indoor studying
Solution Approach 2:
The system proactively provides high intensity blue-enriched light during daytime study periods before myopia can develop or progress. By preemptively delivering the required retinal light exposure through controlled illumination, the lighting apparatus prevents the harmful effects of insufficient exposure without interrupting academic activities
3Object-affected harmful factors
If high intensity light is provided during daytime to prevent myopia, then dopamine secretion is stimulated, but energy consumption increases
Solution Approach 1:
The lighting apparatus applies high intensity illumination only during specific daytime periods when myopia prevention is most critical, rather than operating at maximum intensity continuously. The system follows a periodic pattern - high intensity during daytime study periods, reduced intensity during nighttime, and automatic dimming during non-study periods - thereby reducing overall energy consumption while maintaining effective myopia prevention during key periods
Solution Approach 2:
The system applies light intensity that is sufficient for myopia prevention (5000-15000 lux during daytime) rather than maintaining maximum intensity at all times. By providing partial action - adequate but not excessive light during nighttime and non-study periods - the system reduces energy consumption while maintaining effectiveness during critical daytime periods when myopia prevention is most needed
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 apparatus effectively prevents the onset and progression of myopia by enhancing the circadian rhythm, supporting eye health and overall health by regulating light exposure, benefiting both adolescents and adults.
Implementation Method 1
an LED lighting unit (110) including a white LED (111) that emits white light, a blue LED (112) that emits blue light, and a red LED (113) that emits red light
Data Source
AI summary
Disclosed are a myopia prevention lighting apparatus and a control method thereof, capable of enhancing the circadian rhythm by adjusting the illuminance of a lighting unit. A myopia prevention lighting apparatus according to an aspect of the present disclosure may comprise an LED lighting unit including a white LED that emits white light, a blue LED that emits blue light, and a red LED that emits red light having a wavelength range longer than that of the blue LED; a power supply unit configured to supply power to the LED lighting unit; a timer configured to measure time in order to determine day and night cycles; a light quantity adjustment unit configured to adjust the amounts of the white light, the blue light, and the red light by regulating power supplied from the power supply unit; and a control unit configured to control the light quantity adjustment unit according to a programmed setting such that the mixing ratios of the white light, the blue light, and the red light are adjusted over time to be equal to or greater than 5,000 lux for a certain period during the daytime and equal to or less than 500 lux for a certain period during the nighttime.