Bioactive LED Display Lighting with Circadian Control
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Solution Overview
Problem
Current LED lamps face challenges in providing white light across a range of correlated color temperatures (CCT) values while maintaining high efficiency, luminous flux, good color rendering, and acceptable color stability, as well as effectively controlling circadian stimulating energy (CSE) performance.
Innovation Solution
The development of bioactive display systems and methods that utilize LED-based lighting channels to generate circadian stimulating blue light, less-circadian-inducing blue light, and long red near infrared energy (LRNE) outputs, with control systems adjusting these outputs based on external information such as seasonal conditions, user data, and environmental sensors to optimize lighting performance.
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 the color temperature control is improved, but the spectral gaps remain and color rendering deteriorates
Solution Approach 1:
The patent combines multiple LED types (red, green, blue LEDs) with phosphor materials (yellow phosphor, orange phosphor) into a single integrated lighting system. This merging allows the system to achieve continuous spectral coverage across different CCT ranges while maintaining good color rendering, resolving the contradiction between CCT control and color rendering quality.
Solution Approach 2:
The patent uses composite phosphor materials including yellow phosphor and orange phosphor in specific combinations with LEDs. These composite material formulations enable the system to fill spectral gaps that would otherwise exist when using individual LED types, thereby maintaining color rendering quality across varying CCT values.
2Productivity
If LED lamps increase luminous flux and efficiency, then the lighting performance is improved, but the control of circadian stimulating energy becomes difficult
Solution Approach 1:
The patent segments the lighting system into multiple independently controllable channels with different spectral characteristics (red LED channel, green LED channel, blue LED channel, yellow phosphor channel, orange phosphor channel). This segmentation allows the control system to adjust the contribution of each channel separately, enabling precise control of circadian stimulating energy while maintaining high luminous flux through optimized combination of channels.
Solution Approach 2:
The patent implements dynamic control of the lighting system where the intensity and spectral composition of each LED channel can be adjusted in real-time based on desired CCT and circadian stimulus levels. This dynamic adjustment capability allows the system to maintain high luminous flux while controlling circadian stimulating energy by dynamically balancing the contribution of different spectral components.
3Use of energy by moving object
If LED lamps use narrow bandwidth emission to improve efficiency, then the energy conversion is improved, but the spectral coverage is reduced and color rendering worsens
Solution Approach 1:
The patent extends the spectral coverage by adding temporal and combinatorial dimensions to the lighting system. Instead of relying on a single broadband source, the system uses multiple narrowband LED channels (red, green, blue) combined with phosphor down-conversion channels (yellow, orange). This multi-dimensional approach maintains the efficiency benefits of narrowband LEDs while achieving comprehensive spectral coverage through coordinated operation of multiple channels.
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
These systems provide bioactive illumination that effectively regulates circadian rhythms, improves cognitive function, and reduces the negative effects of excessive blue light exposure, while maintaining high efficiency and color rendering capabilities.
Implementation Method 1
one or more LED-based lighting channels adapted to generate a circadian stimulating blue light output
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.