Dynamic Sky Color Emulation Lighting System
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Solution Overview
Problem
Existing lighting systems fail to effectively emulate sky colors of sunrise, sunset, and mid-day skies, as they struggle to control and dynamically change color points to accurately represent these natural light conditions.
Innovation Solution
A lighting system comprising a visible-light source with semiconductor light-emitting devices, an optical system for combining emissions, and a control system that dynamically adjusts the color points to mimic sunrise, sunset, and mid-day sky colors by selectively generating cyan-ish and orange-ish hues, with varying power levels and spectral changes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing lighting systems control color points of visible-light emissions, then color control capability is improved, but ability to accurately emulate sky colors remains insufficient
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the correlated color temperature (CCT) of visible-light emissions across a wide range (1850K to 20000K) to accurately emulate different sky colors. The system varies spectral power distribution parameters to match the unique characteristics of sunrise, mid-day, and sunset skies, transforming fixed-color lighting into dynamically adjustable sky-color emulation.
2Adaptability or versatility
If lighting systems use multiple semiconductor light-emitting devices to generate different color points, then color versatility is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the visible spectrum into multiple discrete wavelength components (380nm-780nm) that are independently controlled through separate semiconductor light-emitting devices. Each device targets a specific wavelength range, and the control system independently adjusts their intensities to synthesize complex sky colors, breaking down the complex task of color control into manageable spectral segments.
Solution Approach 2:
The patent applies universality by designing a multi-functional lighting system where semiconductor light-emitting devices serve multiple purposes: generating specific wavelength components, combining to create white light, and dynamically adjusting to produce various sky colors. The same hardware infrastructure supports both general illumination and specialized sky-color emulation functions.
3Adaptability or versatility
If lighting systems dynamically change color points over time to emulate sky colors, then circadian rhythm influence is improved, but control system complexity increases
Solution Approach 1:
The patent applies periodic action by implementing time-based control patterns that mimic natural sky color transitions throughout the day. The system automatically cycles through predetermined color sequences (sunrise → mid-day → sunset) at appropriate intervals, using temporal periodicity to influence circadian rhythms without requiring complex real-time environmental sensing or manual intervention.
4Measurement precision
If lighting systems adjust spectral power distribution to match natural sky colors, then color accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies local quality by selectively activating only the semiconductor light-emitting devices and wavelength ranges necessary for emulating the current sky condition. Rather than continuously operating all devices at full power, the system adjusts local spectral components based on the specific sky color being emulated, optimizing energy efficiency while maintaining color accuracy.
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 successfully emulates dynamic sky colors, enhancing the ability to simulate natural light conditions and potentially influencing circadian rhythms by adjusting light emissions to resemble sunrise, sunset, and mid-day skies with high accuracy.
Implementation Method 1
The optical system is arranged to combine together, into combined light emissions, visible-light emissions from semiconductor light-emitting devices among the plurality of the semiconductor light-emitting devices
Implementation Method 2
The plurality of the semiconductor light-emitting devices may include a lumiphor configured for down-converting visible-light emissions of a one of the semiconductor light-emitting devices having a first dominant wavelength into further visible-light emissions having a second dominant wavelength being less than the first dominant wavelength to generate the cyan-ish color point
Data Source
AI summary
Lighting system including visible-light source, optical system, mounting system, and control system. Visible-light source includes plurality of semiconductor light-emitting devices (SLEDs) and selectably generates: visible-light emissions having cyan-ish color point; and visible-light emissions having orange-ish color point. Optical system and mounting system are integrated with visible-light source. Optical system is arranged to combine together, into combined light emissions, visible-light emissions from SLEDs among plurality of SLEDs. Mounting system is arranged for directing combined light emissions as up-light emissions. Control system is coupled with visible-light source and selectably causes visible-light emissions to have cyan-ish color point or orange-ish color point. Control system and optical system cooperatively form combined up-light emissions as having dynamic spectrum for emulating orange-ish sky color at time of day selected to represent sunrise sky or to represent sunset sky, changing over time for emulating cyan-ish sky color at another time of day selected to represent mid-day sky.