Lighting Method Using CIE Coordinates and Planckian Curve Mixing
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Solution Overview
Problem
Existing lighting technologies fail to produce high-quality light that considers human eye sensitivity and melatonin suppression effectively, as measured by indices like ELI and CRI, which do not adequately account for physiological perception and melatonin regulation.
Innovation Solution
A method involving a series of process steps that include verifying CIE coordinates on a CIE 1931 color space chromaticity diagram, mixing color lights to position above the Planckian Curve, and modulating light intensities to produce a high-quality light with specific CIE coordinates, resulting in high SRI and low MLT suppression rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CRI (color rendering index) is used to evaluate light quality, then color accuracy is improved, but physiological perception and melatonin regulation are not considered
Solution Approach 1:
The patent introduces a new evaluation parameter (ELI) that incorporates physiological perception and melatonin regulation considerations, moving beyond traditional CRI parameters. This involves changing the measurement parameters to include human eye sensitivity curves and melatonin suppression data, thereby resolving the contradiction between color accuracy and physiological consideration.
2Reliability
If short wavelength light is used, then melatonin suppression is improved, but visual comfort deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different wavelength regions. Instead of uniformly suppressing all short wavelength light, the invention selectively manages specific wavelength bands based on their differential impact on melatonin versus visual comfort. This allows targeted melatonin suppression while preserving visual comfort through selective wavelength management.
Solution Approach 2:
The invention changes the spectral distribution parameters to achieve optimal balance between melatonin suppression and visual comfort. By adjusting the intensity distribution across different wavelength bands according to human eye sensitivity and melatonin response curves, the system resolves the contradiction between these two opposing requirements.
3Ease of manufacture
If conventional lighting methods are used, then manufacturing simplicity is maintained, but lighting quality and physiological comfort are insufficient
Solution Approach 1:
The patent introduces dynamic control of light emission by multiple lighting devices, allowing real-time adjustment of spectral composition and intensity. This dynamic approach enables conventional manufacturing processes to produce simple lighting units that can dynamically optimize lighting quality and physiological comfort, resolving the contradiction between manufacturing simplicity and lighting quality.
Data Source
AI summary
The present invention provides a method for producing high-quality light, wherein this high-quality light producing method consists of a plurality of particularly-designed process steps based on the sensitivity of human eyes and the melatonin suppression. So that, research and development engineers of lighting devices are able to manufacture a high-quality lighting unit or module through this novel method. Moreover, a variety of experimental data have proved that, the high-quality lighting unit produced by using this novel method is able to perform the advantages of high SRI (Spectrum Resemblance Index) and low MLT (Melatonin) suppression rate.