White Light Emitting Module for Circadian Rhythm Adaptation
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Solution Overview
Problem
Current light emitting devices do not effectively consider human circadian rhythms and retinal sensitivity, leading to inadequate illumination for human-friendly applications.
Innovation Solution
A white light emitting module comprising two light emitting packages with different color temperatures, one with a low Melanopic Daylight Equivalent Factor (MDEF) index for evening/night use and another with a high MDEF index for morning/daytime use, allowing for adjustable illumination based on user needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single white light emitting device is used, then the device structure is simple, but it cannot effectively consider human circadian rhythms and retinal sensitivity
Solution Approach 1:
The patent divides the white light emitting device into multiple separate light emitting packages, each with different color temperatures (first package: 1500K-3000K, second package: 4000K-10000K). This segmentation allows each package to target specific circadian rhythm needs while maintaining manageable individual structures, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent creates a multi-functional light emitting module that can provide both illumination and circadian rhythm regulation. By combining packages with different color temperatures in a single module, it achieves universal applicability for various times of day and human needs, enhancing adaptability without proportionally increasing complexity.
2Illumination intensity
If blue light with short wavelength is used to achieve high color temperature, then the illumination effectiveness for daytime is improved, but the harmful effect on retinal sensitivity and circadian rhythm disruption increases
Solution Approach 1:
The patent changes the wavelength parameter by providing multiple blue light sources with different peak wavelengths (first blue light: 445-455nm, second blue light: 465-495nm). This parameter diversification allows the system to achieve high color temperature for daytime illumination while reducing the concentration of the most harmful short-wavelength blue light, thus protecting retinal sensitivity.
Solution Approach 2:
The patent applies different wavelength conversion parts with specific properties to different light emitting devices. The first wavelength conversion part converts 445-455nm blue light to warm white (1500K-3000K), while the second converts 465-495nm blue light to cool white (4000K-10000K). This local quality differentiation optimizes the balance between illumination effectiveness and retinal protection for different usage scenarios.
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 module provides human-friendly illumination by promoting melatonin secretion in the evening and suppressing it in the morning, enhancing user comfort and activity levels throughout the day.
Implementation Method 1
a first wavelength conversion part that converts at least a portion of a wavelength of the first blue light into the first white light
Implementation Method 2
a second wavelength conversion part that converts at least a portion of each wavelength of the second blue light and the third blue light into the second white light
Implementation Method 3
a filter member that filters the first blue light and absorbs a wavelength band of 570 nm to 590 nm from the first blue light
Data Source
AI summary
Systems and methods are described for a white light emitting module that emits a third white light with the goal of providing human-friendly illumination. The white light emitting device comprise a first light emitting package that emits a first white light and a second light emitting package that emits a second white light. The first light emitting package includes a first light emitting device and a filter member that filters light emitted from the first light emitting device and then reduces a color temperature of the first white light. The second light emitting package includes second and third light devices. The color temperature of the first white light is about 1,500 K to about 4,000 K. A color temperature of the second white light is about 3,000 K to 10,000 K.