Phosphor Substrate Color Conversion for LED Glare Reduction
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Solution Overview
Problem
Existing LED lighting equipment configurations cannot adjust the emitted light color to be different from the light emitted by the light emitting element, limiting flexibility in lighting applications.
Innovation Solution
A phosphor substrate with an insulating substrate, electrode pairs, and a phosphor layer where the phosphor's light emission peak wavelength is in the visible light region, allowing for adjustment of the emitted light color by using the light from the light emitting element as excitation light, and incorporating a CASN phosphor containing Eu with copper electrode pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a reflective material is provided on the substrate to improve light emitting efficiency, then light emitting efficiency is improved, but the light emission color cannot be adjusted to be different from the light emitted by the light emitting element
Solution Approach 1:
The patent applies parameter changes by selecting phosphors with specific emission peak wavelengths that differ from the light emitting element's emission spectrum. By changing the phosphor material parameters (composition, particle size, concentration) and their spatial distribution on the substrate, the system transforms the original light color while maintaining high efficiency. The phosphor layer converts the light emitting element's wavelength to a different visible wavelength range, achieving both efficiency improvement and color adjustment capability.
2Adaptability or versatility
If a phosphor layer is added to adjust light emission color, then light emission color can be adjusted, but device complexity increases
Solution Approach 1:
The patent merges the light emission color adjustment function directly into the substrate structure by integrating the phosphor layer with the substrate surface. This combination approach eliminates the need for separate color conversion components, maintaining a compact and simple overall device structure while achieving the desired color adjustment functionality. The phosphor-containing substrate acts as both the mounting platform and the color conversion element simultaneously.
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
Enables adjustment of the emitted light color to be different from the light emitting element, reduces glare, and alleviates chromaticity variations, while maintaining efficient light emission and heat management.
Implementation Method 1
a phosphor layer which is disposed on one surface of the insulating substrate and includes a phosphor in which a light emission peak wavelength, in a case where light emitted by the light emitting element is used as excitation light, is in a visible light region
Data Source
AI summary
A phosphor substrate having at least one light emitting element mounted on one surface, and includes an insulating substrate, at least one pair of electrode pair which is disposed on one surface of the insulating substrate and bonded to the light emitting element, and a phosphor layer which is disposed on one surface of the insulating substrate and includes a phosphor in which a light emission peak wavelength, in a case where light emitted by the light emitting element is used as excitation light, is in a visible light region.