Bioactive Display Lighting Channels for Circadian Spectral Control
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Solution Overview
Problem
Existing LED lamps face challenges in providing white light across a range of correlated color temperatures (CCT) with high efficiency, luminous flux, good color rendering, and acceptable color stability, while also addressing circadian stimulating energy performance and potential health impacts from blue light exposure.
Innovation Solution
The use of LED-based lighting channels that generate circadian stimulating blue light, less-circadian-inducing blue light, and long red near-infrared energy outputs, controlled by a system that adjusts based on external information and user feedback, to provide bioactive illumination for digital displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If LED lamps use multiple LEDs with different colors to generate white light across a range of CCT values, then color temperature variability is improved, but spectral gaps remain remote from peak wavelengths resulting in poor color rendering
Solution Approach 1:
The patent changes the spectral parameters of the LED light source by incorporating a down-conversion layer with phosphors that convert blue light to red light, thereby filling spectral gaps and improving color rendering while maintaining CCT variability
Solution Approach 2:
The patent uses composite materials including multiple phosphors (yellow phosphor and red phosphor) in the down-conversion layer to create a combined spectral output that maintains both CCT adjustability and improved color rendering across the visible spectrum
2Use of energy by moving object
If LED lamps prioritize high efficiency and luminous flux, then energy efficiency is improved, but circadian stimulating energy performance cannot be effectively managed
Solution Approach 1:
The patent segments the lighting function into multiple independent LED channels (first blue LED channel, second blue LED channel, red LED channel) that can be independently controlled to manage circadian stimulating energy while maintaining overall energy efficiency
Solution Approach 2:
The patent implements dynamic control of LED channel intensities based on temporal context (morning, daytime, evening) to adjust circadian stimulating energy output while optimizing energy efficiency for different times of day
3Stability of the object's composition
If LED lamps focus on maintaining color stability, then color consistency is improved, but ability to provide bioactive illumination with specific circadian effects is limited
Solution Approach 1:
The patent makes the LED lighting system multi-functional by enabling it to simultaneously provide stable white light for general illumination and adjustable spectral compositions for bioactive/circadian effects through independent channel control
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
This approach enables dynamic control of lighting conditions to enhance user well-being by balancing blue light and infrared energy, improving circadian rhythm regulation and overall health benefits, while maintaining high efficiency and color accuracy.
Implementation Method 1
one or more LED-based lighting channels adapted to generate a circadian-inducing blue light output
Implementation Method 2
a long red near infrared energy (LRNE) output in a third operational mode
Data Source
AI summary
Bioactive display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate one or more of a long red near infrared (LRNE) red light, a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The bioactive lighting can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and one of a LRNE output and a less-circadian-inducing blue light output in a second operational mode.