Cyan LED Lighting System for High CRI and Melanopic Control
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Solution Overview
Problem
Current LED-based lighting systems struggle to effectively adjust melanopic stimulation in response to different times of day while maintaining high color rendering index (CRI) and correlated color temperature (CCT) ranges.
Innovation Solution
A light generating system comprising multiple light sources, including warm white, cool white, and cyan LEDs, configured to generate light with adjustable melanopic stimulation. This system allows for control of the ratio of light sources to optimize melanopic effectiveness and maintain high CRI over a wide CCT range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple LED components are operated simultaneously to provide adjustable melanatonin suppressing effects, then melatonin suppression effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent divides the lighting system into multiple independent LED components (blue LED, cyan LED, green LED, yellow-green LED, red LED) that can be individually controlled. Each LED component targets specific wavelengths to influence melanopic stimulation, allowing precise adjustment of melatonin suppression effects while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system dynamically adjusts the intensity and spectral composition of multiple LED components based on different operating modes (daylight mode, evening mode, night mode). The controller modifies the contribution of each LED component in real-time to achieve desired melanopic stimulation levels, enabling adaptive melatonin suppression that responds to temporal and environmental conditions.
2Reliability
If the spectral power distribution is adjusted to increase melanopic stimulation, then melatonin suppression effectiveness is improved, but color rendering index deteriorates
Solution Approach 1:
The patent applies local quality by assigning specific spectral characteristics to different LED components. Each LED (blue, cyan, green, yellow-green, red) is positioned to contribute to specific regions of the spectrum. The controller selectively activates or intensifies particular LEDs based on whether the priority is melanopic stimulation (activating blue and cyan LEDs) or color rendering (activating green, yellow-green, and red LEDs), thereby optimizing local spectral quality for the desired function.
Solution Approach 2:
The system changes spectral parameters by adjusting the intensity ratios of multiple LED components with different dominant wavelengths. By varying the relative contributions of blue (430-480nm), cyan (470-505nm), green (500-560nm), yellow-green (560-580nm), and red (610-680nm) LEDs, the controller dynamically modifies the overall spectral power distribution to achieve either high melanopic stimulation or high color rendering index depending on operational requirements.
3Reliability
If the correlated color temperature is increased to mimic daylight, then melanopic stimulation is improved, but adaptability to different times of day deteriorates
Solution Approach 1:
The system dynamically adjusts correlated color temperature and melanopic stimulation based on temporal context. During daytime hours, the controller increases CCT and melanopic stimulation by activating blue and cyan LEDs. During evening and nighttime hours, the controller reduces CCT and melanopic stimulation by deactivating or dimming blue LEDs and emphasizing warmer spectrum LEDs (green, yellow-green, red). This dynamic adaptation enables the system to provide appropriate circadian support throughout the 24-hour cycle.
Solution Approach 2:
The patent implements periodic action by establishing distinct operating modes that correspond to different times of day (daylight mode, evening mode, night mode). The controller transitions between these modes in a periodic fashion, adjusting spectral composition and intensity to match natural circadian patterns. This periodic modulation of light output aligns with the body's natural rhythm, providing high melanopic stimulation during daytime and low stimulation during nighttime.
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 achieves a high Melanopic D65 Efficiency Factor (MDER) while maintaining a CRI of at least 80 over a broad CCT range, effectively adapting to the time of day and enhancing circadian rhythm entrainment.
Implementation Method 1
one or more third light generating devices are configured to generate third device light having a third dominant wavelength λd3 selected from the range of 470-500 nm
Implementation Method 2
one or more first light generating devices are configured to generate white first device light having a first color rendering index CRI1 and a first correlated color temperature Tc1; one or more second light generating devices are configured to generate white second device light having a second color rendering index CRI2 and a second correlated color temperature Tc2
Data Source
AI summary
The invention provides a light generating system (1000) comprising one or more first light generating devices (110), one or more second light generating devices (120), and one or more third light generating devices (130), wherein: —the one or more first light generating devices (110) are configured to generate white first device light (111) having a first color rendering index CRI1 and a first correlated color temperature Tc1; —the one or more second light generating devices (120) are configured to generate white second device light (121) having a second color rendering index CRI2 and a second correlated color temperature Tc2; —the one or more third light generating devices (130) are configured to generate third device light (131) having a third dominant wavelength λd3 selected from the range of 470-500 nm; —CRI1−CRI2≥10; CRI1≥85; Tc2−Tc1≥1000K; Tc1≤3500K; and Tc2≥3000K; and—the light generating system (1000) is configured to generate system light (1001) comprising one or more of the first device light (111), the second device light (121), and the third device light (131).