LED Light Emitting Device Reflective Insulation Layer Wavelength Conversion
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Solution Overview
Problem
There is a need for light-emitting devices that can provide various optical features such as different light intensities, patterns, and color temperatures for applications like household appliances and camera flash, which existing LED technologies have not adequately addressed.
Innovation Solution
A light-emitting device design incorporating a light-emitting diode with a metal bump and a reflective insulation layer, along with a wavelength conversion layer, to achieve customizable light emission by using a substrate with III-V group semiconductor materials and specific materials for the metal bumps and insulation layers, allowing for adjustable peak wavelengths and color temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wavelength conversion layer is added to achieve customizable light emission, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent combines the wavelength conversion layer with the insulation layer into a single integrated structure. The insulation layer serves dual functions: providing electrical insulation and enabling wavelength conversion through embedded phosphor particles, thereby achieving customizable light emission without adding separate components
Solution Approach 2:
The insulation layer is designed to perform multiple functions simultaneously: electrical insulation, mechanical support, and wavelength conversion. By embedding phosphor particles within the insulation layer, the same structural element accomplishes both protective and optical conversion roles, reducing overall device complexity
2Productivity
If a reflective insulation layer is formed at the lower sides of light emitting structures, then light distribution efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the reflective insulation layer formation with the standard insulation layer deposition process. By incorporating phosphor particles during the same manufacturing step, the reflective and insulating functions are achieved in a single process rather than requiring separate manufacturing steps
Solution Approach 2:
The patent modifies the insulation layer by embedding phosphor particles with specific size ranges (0.1-10 μm) and controlling their distribution density. This parameter change enables the layer to exhibit reflective properties while maintaining insulation functionality, achieving improved light distribution through material composition adjustment rather than complex structural design
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 device enables flexible light emission with adjustable peak wavelengths and color temperatures, enhancing its applicability across diverse applications by providing efficient light distribution and mechanical support, while maintaining compactness.
Implementation Method 1
a reflective insulation layer... covers the side surface
Data Source
Figure 1A~1B
Figure 1C
Figure 1D~1E
AI summary
This disclosure discloses a light-emitting device. The light-emitting device includes a light-emitting diode, a metal bump, and a reflective insulation layer. The light-emitting diode includes an active layer, an insulation layer formed on the active layer and having a side surface, and a pad electrically connected to the active layer. The metal bump is formed on the pad. The reflective insulation layer covers the side surface.