Phosphor Substrate Layout for LED Color Conversion and Glare Reduction
Find Innovative SolutionsGenerate Solutions
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 elements, and a phosphor layer with a light emission peak wavelength in the visible region, where the phosphor layer is strategically positioned around the electrode layer to convert the light emission color, utilizing a copper electrode layer for enhanced wavelength conversion and glare reduction.
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, the emitted light color can be adjusted while maintaining high light emitting efficiency through the flat electrode layer design that prevents light loss.
Solution Approach 2:
The patent uses composite materials by combining the light emitting element with specific phosphor materials to create a hybrid light emission system. The phosphor layer, containing materials like YAG:Ce or red phosphors, works together with the LED chip to produce combined light emission, enabling color adjustment while maintaining efficiency. The flat electrode layer also acts as a reflective composite structure.
2Adaptability or versatility
If the phosphor layer is disposed around the bonded portion of the electrode layer with the light emitting element, then light emission color can be adjusted, but the structural complexity increases
Solution Approach 1:
The patent merges the electrode layer and phosphor layer into an integrated structure where the phosphor layer is disposed around the bonded portion of the electrode layer. This merging eliminates the need for separate reflective material applications and simplifies the manufacturing process while achieving both electrical connection and light color adjustment functions in a single structural arrangement.
Solution Approach 2:
The electrode layer structure serves multiple functions: it provides electrical connection to the light emitting element, acts as a reflective surface, and supports the phosphor layer for color conversion. This multi-functionality reduces the need for additional components and simplifies the overall device structure while achieving light color adjustment.
3Illumination intensity
If the surface of the electrode layer facing the outer side is made flat, then light emission is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies self-service by designing the electrode layer to automatically form a flat surface through its own structural properties and manufacturing process. The electrode layer material and deposition process are selected to naturally produce a flat top surface without requiring additional precision machining or post-processing steps, thereby achieving high light emission while avoiding stringent manufacturing precision requirements.
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 original light emitting element, reducing glare and alleviating 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, an electrode layer 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, in which a surface of the electrode layer facing an outer side in a thickness direction of the insulating substrate is a flat surface, and at least a part of the phosphor layer is disposed around a bonded portion of the electrode layer with the light emitting element.