COB Photoelectric Structure With KSF Isolation Against Corrosion
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Solution Overview
Problem
The KSF phosphor used in COB type LED light sources is highly corrosive and unstable due to its reactivity with metal structures and water, leading to reduced luminous efficiency and stability.
Innovation Solution
A COB type photoelectric device design that includes a metallic substrate with a dam and KSF phosphor-based layer not in contact with the substrate, covered by an isolation layer, which enhances luminous efficiency while preventing corrosion and maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If KSF phosphor is added to COB type light source to improve luminous efficiency, then luminous efficiency is improved, but metal structures are corroded and stability deteriorates
Solution Approach 1:
An isolation layer is introduced as an intermediary between the KSF phosphor and the metal substrate/chip electrodes. This isolation layer prevents direct contact between the corrosive KSF phosphor and metal structures, eliminating the corrosion issue while preserving the high luminous efficiency of the KSF phosphor in the COB type light source.
2Loss of energy
If KSF phosphor is used to enhance luminous efficiency, then luminous efficiency is improved, but KSF reacts with water and air causing decomposition
Solution Approach 1:
The isolation layer serves as a protective barrier that prevents water and air from reaching the KSF phosphor. This intermediary layer maintains the chemical stability of the KSF phosphor by eliminating its exposure to reactive environments, while the phosphor continues to provide high luminous efficiency when excited.
3Loss of energy
If KSF phosphor is applied directly on metal substrate to improve luminous efficiency, then luminous efficiency is improved, but corrosion of metal substrate occurs
Solution Approach 1:
The isolation layer is positioned between the KSF phosphor and the metal substrate to act as a protective intermediary. This layer prevents the corrosive KSF phosphor from directly contacting and corroding the metal substrate and chip electrodes, while still allowing the phosphor to function effectively for light emission.
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 solution effectively utilizes the high luminous efficiency of KSF phosphors while preventing corrosion, thereby improving the stability and performance of COB type light sources by isolating the phosphor from metal structures and water.
Implementation Method 1
The KSF phosphor based layer includes a KSF phosphor
Data Source
AI summary
A COB type photoelectric device is provided. The COB type photoelectric device includes: a metallic substrate including a photoelectric element fixing area; a dam disposed on the metallic substrate and surrounding the photoelectric element fixing area; first photoelectric elements disposed on the metallic substrate and in the photoelectric element fixing area; a KSF phosphor based layer disposed on the first photoelectric elements and being not in contact with the metallic substrate; and an isolation layer disposed in the dam and covering the KSF phosphor based layer. The KSF phosphor based layer includes a KSF phosphor. The COB type photoelectric device can make full use of high luminous efficiency performance of the KSF, and improve luminous efficiency of the COB type photoelectric device while maintaining stability of the KSF.