LED Light Source Module with Multi-Wavelength Fluorescent Powders
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Solution Overview
Problem
Current LED lighting products do not effectively enhance human concentration by increasing the circadian stimulus value while also considering energy saving, illumination, color, and color rendering, particularly in office and educational settings.
Innovation Solution
A light source module comprising a blue LED chip and a packaging part with specific fluorescent powders that convert light into neutral white light, achieving a high circadian stimulus value and improved color rendering by distributing spectral energy across various wavelength ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional LED lighting products are used, then energy saving and illumination are achieved, but circadian stimulus value is insufficient and color rendering is inadequate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the peak wavelengths of fluorescent powders (first: 485-515nm, second: 520-580nm, third: 615-655nm) and the spectral energy distribution across different wavelength ranges. This transforms the LED light output parameters to achieve both energy efficiency and high circadian stimulus value (CS>0.45) with excellent color rendering (CRI≥90.0).
Solution Approach 2:
The patent uses composite materials by combining multiple fluorescent powders with different emission characteristics (blue-green, yellow-green, and red fluorescent powders) in the packaging part. This composite fluorescent material system converts blue LED light (435-465nm) into a composite spectrum that provides both energy saving and high circadian stimulus value.
2Illumination intensity
If traditional LED lighting products are used, then illumination is achieved, but color rendering index is insufficient
Solution Approach 1:
The patent applies parameter changes by optimizing the spectral energy distribution parameters across five different wavelength ranges ([380-470nm], (470-560nm], (560-780nm], (470-520nm], and (520-580nm]). This precise parameter control ensures high color rendering index (CRI≥90.0) while maintaining effective illumination.
Solution Approach 2:
The patent uses composite fluorescent materials with specific peak wavelengths to broaden the spectral coverage. The combination of blue-green (485-515nm), yellow-green (520-580nm), and red (615-655nm) fluorescent powders creates a composite emission spectrum that renders colors accurately while providing sufficient illumination.
3Object-affected harmful factors
If blue LED chip with fluorescent powders is used, then circadian stimulus value is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for spectral energy distribution (12.0%-32.0% for [380-470nm], 25.0%-45.0% for (470-560nm], 36.0%-56.0% for (560-780nm], 14.0%-34.0% for (470-520nm]). These standardized parameter ranges simplify manufacturing quality control while ensuring high circadian stimulus value (CS>0.45).
Solution Approach 2:
The patent applies local quality by assigning specific functions to different spectral regions: the first wavelength range ([380-470nm]) targets circadian rhythm regulation, while the second ((470-560nm]) and third ((560-780nm]) ranges target color rendering. This functional differentiation simplifies manufacturing by focusing quality control on specific spectral regions.
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 solution provides a cold white LED light source with high luminous efficiency and high color rendering, suitable for enhancing human concentration and suitable for office lighting, with a circadian stimulus value greater than 0.45 and a color rendering index of ≥90.0.
Implementation Method 1
a first additional luminous body which is arranged to receive part of the light emitted by the first light-emitting element and convert it into second color light with a peak wavelength of 485 ̃515 nm
Implementation Method 2
the second additional luminous body which is arranged to receive part of the light emitted by the first light-emitting element and convert it into third color light with a peak wavelength of 520 ̃580 nm
Implementation Method 3
the third additional luminous body which is arranged to receive part of the light emitted by the first light-emitting element and convert it into fourth color light with a peak wavelength of 615 ̃655 nm
Data Source
AI summary
A light source module and a lighting device using the light source module. The light source module includes a first light-emitting element and a packaging part covering the first light-emitting element. The packaging part includes a first additional luminous body, a second additional luminous body, and a third additional luminous body, the light emitted by each luminous body is mixed into day white light, which is used as the emitted light of the light source module. The light source module provided by the present disclosure provides a cold white LED (5700K) light source with high luminous efficiency, high CS values and high color rendering by controlling the ratio of luminous energy of different wavelength ranges in the total luminous energy.