Multichannel LED Lighting System for Black Body Locus White Light
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Solution Overview
Problem
Conventional multichannel LED fixtures are unable to generate high-quality white light across a broad range of color temperatures, with limited color rendering index (CRI) and efficiency, failing to produce all white color points on the black body locus, which affects color perception and light quality in various environments.
Innovation Solution
A multichannel LED lighting system incorporating at least one green-shifted white LED, one blue-shifted white LED, and one red or amber LED, along with a multichannel lighting control system, to generate white light adjustable across a range of correlated color temperatures (CCT) from 2400K to 6500K, achieving high CRI and efficiency by producing light corresponding to points near the black body locus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional multichannel LED fixtures use multiple white LEDs with different CCTs or RGB LEDs to generate white light, then the system can achieve adjustable color temperature, but the color rendering index (CRI) and efficiency remain limited and cannot generate all white color points on the black body locus
Solution Approach 1:
The invention divides the white light generation into multiple independent channels, each responsible for specific spectral components. Instead of using a single white LED or RGB combination, the system segments the spectrum into blue, cyan, green, yellow-green, yellow, orange, and red channels, with each channel independently controllable to achieve precise color mixing and high CRI across the black body locus.
Solution Approach 2:
The invention uses a composite approach by combining multiple LED types with different spectral characteristics (blue LED, cyan LED, green LED, yellow-green LED, yellow LED, orange LED, red LED) to create a unified lighting system. This composite structure allows the system to leverage the strengths of each LED type to achieve comprehensive spectral coverage and high color rendering.
2Adaptability or versatility
If conventional LED fixtures use multiple discrete white LEDs with different CCTs, then the system can adjust color temperature, but the gamut along the black body is very small and cannot generate all white color points
Solution Approach 1:
The invention implements dynamic control of multiple LED channels through a processor that independently adjusts the intensity of each channel based on the desired color temperature and color rendering requirements. This dynamic adjustment capability allows the system to generate any white color point on or near the black body locus by varying the contribution of each spectral channel in real-time.
3Adaptability or versatility
If RGB LEDs are used to generate white light, then the system can produce various colors, but the light is saturated and cannot generate all colors in the gamut with high CRI
Solution Approach 1:
The invention applies local quality by assigning specific spectral responsibilities to each LED channel. Rather than relying on broad-spectrum white LEDs or saturated RGB combinations, each channel is optimized to provide specific spectral components (blue, cyan, green, yellow-green, yellow, orange, red) that collectively achieve complete spectral coverage and high color rendering across all white color points.
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 provides enhanced color quality, high CRI, and improved efficiency, generating true white color points as perceived by the human eye, with lumens/watt efficiency greater than 60 and CRI above 85 across the specified CCT range, significantly surpassing conventional LED fixtures.
Implementation Method 1
at least one first light emitting diode (LED) coupled to the housing and configured to emit green-shifted white light, at least one second LED coupled to the housing and configured to emit blue-shifted white light, and at least two third LEDs coupled to the housing, wherein one third LED is configured to emit a red-orange light and another third LED is configured to emit an amber light
Data Source
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AI summary
Methods and apparatus are provided for generating white light at points that are along and near a black body locus. In one embodiment, an illumination source includes a housing (101), at least one first light emitting diode (LED) (102) coupled to the housing and configured to emit green-shifted white light, at least one second LED (104) coupled to the housing and configured to emit blue-shifted white light, and at least one third LED (106) coupled to the housing and configured to emit at least one of a red-orange light and an amber light.