Light Source Wavelength Modulator with Spacer for Thermal Management
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Solution Overview
Problem
Existing solar cells and LEDs face inefficiencies due to poor response to certain light wavelengths, and the heat from light sources deteriorates phosphor materials in LED white light emission, leading to reduced efficiency and color fading.
Innovation Solution
A light source wavelength modulator with a spacer technology for indirect contact between the phosphor material and light source, utilizing a substrate with good transmittance and thermal conduction, and a wavelength modulation layer made of phosphor powder materials with different conversions, which converts poor light spectra into more responsive ranges, enhancing efficiency and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light source is in direct contact with the phosphor material in LED white light emission, then the structure is simple, but the heat produced by the light source deteriorates the phosphor material resulting in lower light efficiency and color fading
Solution Approach 1:
The patent introduces a spacer as an intermediary component between the light source and phosphor material. This spacer physically separates the two components, preventing direct contact while still allowing optical interaction. The spacer acts as a mediator that blocks heat transfer from the light source to the phosphor material, thereby preventing phosphor deterioration and color fading while maintaining structural feasibility
Solution Approach 2:
The patent divides the previously integrated light source-phosphor contact structure into separate components by introducing the spacer. This segmentation creates distinct functional zones: the light source region, the spacer region (which also serves as a reflection cavity), and the phosphor material region. This separation allows each component to operate optimally without mutual interference, particularly protecting the phosphor from thermal damage
2Stability of the object's composition
If the original solar spectrum is used directly, then the spectral composition is natural, but the utility efficiency of solar photovoltaic cells is limited due to poor response in certain wavelength domains
Solution Approach 1:
The patent applies wavelength modulation by changing the spectral parameters of the incident light. The wavelength modulation layer alters the wavelength distribution of sunlight, converting ultraviolet components to visible light and adjusting the spectral composition to match the peak sensitivity range of solar photovoltaic cells. This parameter transformation improves energy conversion efficiency while maintaining the fundamental nature of the light spectrum
Solution Approach 2:
The wavelength modulation layer serves multiple functions: it acts as a spectral converter for solar photovoltaic cells, a wavelength modulator for LED enhancement, and a heat reflection barrier. This multi-functionality allows a single component to address multiple problems in the optoelectronic system, improving overall system efficiency across different applications
3Device complexity
If phosphor material is coated directly onto LED chip, then the packaging is simple, but the high temperature from the light source causes color fading and reduced light efficiency
Solution Approach 1:
The spacer serves as a protective intermediary between the LED chip and phosphor material. It physically isolates the phosphor from the high-temperature environment near the LED chip while still enabling optical coupling. This intermediary structure prevents thermal degradation of the phosphor, maintaining color stability and light efficiency without requiring complex packaging solutions
Solution Approach 2:
The invention transitions from a direct planar contact structure to a three-dimensional configuration with the spacer creating vertical separation. The spacer forms a reflection cavity that extends into the third dimension (vertical space), allowing heat to be reflected away from the phosphor while maintaining optical interaction. This dimensional change enables thermal management without compromising optical 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
Improves the utility efficiency of light sources by converting non-responsive light spectra into optimal ranges for solar cells and extends the life and efficiency of LED white light emission by preventing heat-induced deterioration of phosphor materials.
Implementation Method 1
a wavelength modulation layer, disposed on the substrate, and made of a wavelength modulation material... composed of a plurality of phosphor powder materials with different wavelength conversions
Implementation Method 2
a substrate made of a material having good light transmittance and thermal conduction
Data Source
AI summary
A light source wavelength modulator includes a substrate made of a material with a high light transmittance and a thermal conduction effect, a wavelength modulation layer formed on the substrate and made of a wavelength modulation material, and patternized or multilayered, and further having a spacer between the wavelength modulation layer and its corresponding light source for achieving the best light source wavelength modulation, such that a portion of light spectrum of an original solar light or LED having no response or poor response to the light receiver is converted into a range of the best application efficiency for improving the utility efficiency of the light source. The white light emitted from the LED is gone through a wavelength modulation to enhance the light emitting color rendering, conversion efficiency and using life.