Phosphor Substrate Layout for LED Color Tuning and 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, an electrode layer bonded to the light emitting element, and a phosphor layer with a light emission peak wavelength in the visible region, where the phosphor layer is positioned to surround the bonded surface of the electrode layer, allowing for adjustment of the emitted light color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a reflective material is provided on the substrate surface to improve light emitting efficiency, then light emission efficiency is improved, but the ability to adjust light emission color is lost
Solution Approach 1:
The substrate surface is segmented into multiple regions with different reflective properties. Each region contains phosphor particles with specific emission characteristics, allowing different portions of the reflected light to have different colors. This segmentation enables color adjustment while maintaining high light emission efficiency through the reflective structure.
Solution Approach 2:
Different regions of the substrate surface are assigned different local qualities - specifically, different phosphor compositions and particle sizes are used in different regions to create varied emission colors. This local differentiation allows the system to adjust overall light emission color by controlling which regions are activated, while the reflective material maintains high efficiency in each local area.
2Adaptability or versatility
If a phosphor layer is added to adjust light emission color, then light emission color adjustment capability is improved, but device complexity increases
Solution Approach 1:
The reflective material and phosphor layer are merged into a single integrated structure. The phosphor particles are embedded within or on top of the reflective material, combining the light reflection function and color conversion function into one component. This merging reduces device complexity by eliminating the need for separate reflective layers and phosphor layers, while still achieving light emission color adjustment capability.
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, reducing glare and alleviating chromaticity variations, while improving light emission efficiency.
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, includes an insulating substrate, at least one electrode pair disposed on one surface of the insulating substrate and bonded to the light emitting element, and a phosphor layer disposed on one surface of the insulating substrate, including a phosphor in which a light emission peak wavelength, in a case where light emitted by the element is used as excitation light, is in a visible light region, in which a bonded surface of the electrode pair facing an outer side in a thickness direction of the insulating substrate, the bonded surface being bonded to the light emitting element, is positioned further on the outer side in the thickness direction than a non-bonded surface other than the bonded surface, and at least a part of the phosphor layer is disposed around the bonded surface of the one surface.