Inclined LED Mounting Substrate for Low-Loss Waveguide Refraction
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Solution Overview
Problem
Conventional light-emitting devices experience significant transmission loss when an optical waveguide is irradiated with light, due to inefficient light refraction and increased diffuse reflection from the substrate's surface features.
Innovation Solution
A substrate for mounting light-emitting elements is designed with a base and dam part, where the front surface is inclined relative to the back surface, featuring an opening part with an inclined first wall member that reduces thickness and increases the opening angle, minimizing light impingement and maintaining a flush inner surface to prevent diffuse reflection, thereby enhancing light refraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the substrate uses conventional vertical surfaces, then the structure is simple and easy to manufacture, but light refraction efficiency is poor and transmission loss is high
Solution Approach 1:
The substrate employs inclined surfaces instead of vertical surfaces, creating angled interfaces that optimize light refraction. The first inclined surface and second inclined surface form specific angles with the base, transforming the light path to reduce diffuse reflection and improve refraction efficiency into the optical waveguide.
Solution Approach 2:
The substrate design changes the geometric parameters of the light-emitting element mounting region by introducing inclined surfaces with specific angles. This parameter modification optimizes the refraction angle of light entering the optical waveguide, thereby reducing transmission loss and improving coupling efficiency.
2Illumination intensity
If the substrate has a larger opening area, then more light can be emitted, but diffuse reflection increases and refraction accuracy decreases
Solution Approach 1:
The inclined surfaces replace vertical surfaces to create angled light emission paths. This geometric transformation reduces diffuse reflection from the substrate surfaces while maintaining adequate light emission intensity, thereby improving refraction accuracy into the optical waveguide.
Solution Approach 2:
The substrate design applies different surface characteristics to different regions: the first inclined surface and second inclined surface have specific angles optimized for light refraction, while the third inclined surface and fourth inclined surface provide structural support. This localized optimization balances light emission intensity with refraction accuracy.
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
This configuration reduces transmission loss and increases the accuracy of light refraction in optical waveguides, maintaining high light emission efficiency while improving heat dissipation through the use of aluminum nitride ceramics with high thermal conductivity.
Implementation Method 1
improving heat dissipation through the use of aluminum nitride ceramics with high thermal conductivity
Data Source
AI summary
A substrate for mounting a light-emitting element includes a base and a dam part. The base includes a front surface and a back surface that are principal surfaces thereof where the front surface includes a mounting part that is capable of mounting a light-emitting element thereon. The dam part is arranged on a peripheral part of the front surface to surround the mounting part. The front surface is inclined relative to the back surface at a predetermined angle. The dam part is provided with an opening part at a site where the front surface is inclined to decrease a thickness of the base, in the peripheral part of the front surface. A site of the dam part where the opening part is provided is inclined relative to the back surface in a direction of the front surface.