LED Lighting Apparatus Tuning Melanopic Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LED lighting technologies fail to effectively provide human-centric lighting that optimally adjusts for human circadian rhythms, as they lack precise control over the melanopic/photopic (M/P) ratio and color temperature, which is crucial for enhancing comfort and productivity.
Innovation Solution
The LED lighting apparatus incorporates multiple light sources, including first and second LED light sources emitting white light with specific M/P ratios and a tuning LED light source emitting blue light, along with wavelength conversion materials to generate tuned white light with adjustable M/P ratios, allowing for precise control of color temperature and intensity in the melanopic sensitive zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LED lighting is used, then the device complexity is low, but the ability to adjust M/P ratio and color temperature for human-centric lighting is insufficient
Solution Approach 1:
The lighting system is divided into multiple independent LED light sources (first LED light source, second LED light source, tuning LED light source), each capable of emitting light with different spectral characteristics. This segmentation allows independent control of each light source to achieve precise adjustment of the overall M/P ratio and color temperature, resolving the contradiction between adaptability and complexity by making the system modular and controllable.
Solution Approach 2:
The patent implements dynamic control of the LED light sources through a driving control unit that can adjust the intensity and spectral composition of each light source in real-time. This enables the system to dynamically adapt the M/P ratio and color temperature according to different human-centric lighting requirements, transforming a static lighting system into a dynamically adjustable one that maintains optimal performance across varying conditions.
2Adaptability or versatility
If multiple wavelength conversion materials are used to achieve precise spectral control, then the M/P ratio adjustment capability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes wavelength conversion materials with specifically selected emission characteristics (e.g., first wavelength conversion material emitting at 520-560 nm, second wavelength conversion material emitting at 600-645 nm) to transform the spectral output of the LED light sources. By carefully selecting and combining materials with different emission parameters, the system achieves precise spectral control and M/P ratio adjustment while managing manufacturing precision through material selection rather than complex mechanical adjustments.
Solution Approach 2:
The system employs composite wavelength conversion approaches where multiple wavelength conversion materials are combined with the LED light sources to create a composite lighting system. This allows the integration of different spectral characteristics in a unified system, achieving complex spectral control goals through material composition rather than complex mechanical or electronic control mechanisms, thereby managing manufacturing precision requirements.
3Productivity
If multiple LED light sources with different spectral characteristics are combined, then the human-centric lighting performance is improved, but the device complexity increases
Solution Approach 1:
Each LED light source in the system is designed with multi-functionality, capable of contributing to different aspects of human-centric lighting (color temperature adjustment, M/P ratio control, overall illumination). The driving control unit provides universal control over all light sources, managing their intensity and spectral characteristics to achieve multiple lighting objectives simultaneously. This multi-functionality reduces the need for separate specialized components, managing device complexity while maintaining high productivity in terms of comfort and lighting performance.
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 solution enables the generation of tuned white light with adjustable M/P ratios and color rendering indices, improving human-centric lighting by enhancing comfort and productivity through optimized spectral control.
Implementation Method 1
a first light emitting diode configured to emit first blue light having a peak wavelength in a range of 435 nm to 465 nm
Implementation Method 2
a second light emitting diode configured to emit second blue light having a peak wavelength in a range of 465 nm to 495 nm
Implementation Method 3
a first wavelength conversion material configured to be excited by the first blue light and the second blue light and to emit first light having a peak wavelength in a range of 520 nm to 560 nm
Implementation Method 4
a second wavelength conversion material configured to be excited by the first and second blue lights and to emit second light having a peak wavelength in a range of 600 nm to 645 nm
Implementation Method 5
a third light emitting diode configured to emit third blue light having the peak wavelength in the range of 435 nm to 465 nm
Implementation Method 6
a third wavelength conversion material configured to be excited by the third blue light and to emit third light having a peak wavelength in a range of 540 nm to 560 nm
Implementation Method 7
a fourth wavelength conversion material configured to be excited by the third blue light and to emit fourth light having a peak wavelength in a range of 620 nm to 650 nm
Implementation Method 8
a tuning LED light source configured to emit tuning blue light having the peak wavelength in the range of 465 nm to 495 nm
Data Source
AI summary
An LED lighting apparatus, including an LED light source configured to emit white light having a first melanopic/photopic (M/P) ratio; a tuning LED light source configured to emit tuning blue light having a peak wavelength in a range of 465 nm to 495 nm; and a driving control unit configured to control currents respectively applied to the LED light source and the tuning LED light source to generate tuned white light having a second M/P ratio higher than the first M/P ratio