Phosphor Plate Spinel Scattering Control
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Solution Overview
Problem
The existing phosphor plates, particularly those disclosed in Patent Document 1, face challenges in achieving optimal light emission intensity due to excessive light scattering.
Innovation Solution
Incorporating relatively transparent spinel into an inorganic base material in the phosphor plate, while using a phosphor containing a Si element, and controlling the peak intensity ratio in the X-ray diffraction pattern to improve light emission intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If spinel is contained in the inorganic base material to reduce light scattering, then light emission intensity is improved, but light scattering control becomes difficult when using Si element phosphor
Solution Approach 1:
The patent applies parameter changes by precisely controlling the peak intensity ratio in the X-ray diffraction pattern (setting it to 0.2 or less) to regulate the amount of spinel in the base material. This quantitative control of material composition allows optimization of light transmission while maintaining the desired light emission intensity, resolving the contradiction between improving illumination and controlling light scattering.
2Illumination intensity
If the peak intensity ratio of spinel is increased to improve light transmission, then light emission intensity improves, but light scattering increases excessively
Solution Approach 1:
The patent uses parameter changes by establishing a specific upper limit (0.2 or less) for the peak intensity ratio of spinel in the X-ray diffraction pattern. This quantitative parameter control ensures that the spinel content is optimized to provide sufficient light transmission while preventing excessive light scattering, thus resolving the contradiction between improving illumination intensity and reducing harmful light scattering.
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 approach effectively suppresses excessive light scattering and enhances the light emission intensity of the phosphor plate, leading to improved performance in light emitting devices.
Implementation Method 1
excessive scattering of light in the phosphor plate is suppressed by containing relatively transparent spinel
Implementation Method 2
the phosphor includes a phosphor containing a Si element
Data Source
AI summary
A phosphor plate includes a plate-like composite including a base material and a phosphor contained in the base material, in which the base material contains spinel, the phosphor includes a phosphor containing a Si element, and in an X-ray diffraction pattern of the phosphor plate using a Cu-Kα ray, in a case in which peak intensity corresponding to the spinel having a diffraction angle 2θ in a range of 36.0° or more and 37.4° or less is set to 1, total intensity of peaks having a diffraction angle 2θ in a range of 32.5° or more and 34.5° or less satisfies 0.5 or less.