LED Electrode Layout With Inclined Reflectors for Simpler Fabrication
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Solution Overview
Problem
The manufacturing process of light-emitting diodes (LEDs) is complicated due to the formation of walls and reflective electrodes, and there is a need for improved light emission efficiency.
Innovation Solution
A light-emitting device with a substrate, first and second electrodes, and light-emitting elements, where the first electrode has inclined surfaces and functions as a reflective electrode, and the second electrode is connected through a through-hole in the substrate, allowing for a simplified manufacturing process and increased light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If walls are formed around the light-emitting diode and reflective electrodes are formed on the walls, then light emission efficiency is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the wall structure and reflective electrode into a single integrated component. The electrode pattern itself forms the reflective surface, eliminating the need for separate wall structures. This integration maintains light reflection functionality while significantly simplifying the manufacturing process by reducing the number of fabrication steps and components.
Solution Approach 2:
The electrode pattern serves multiple functions simultaneously: it provides electrical connection to the light-emitting diode and acts as the reflective surface for redirecting light. This multi-functionality eliminates the need for dedicated reflective wall structures, thereby simplifying manufacturing while maintaining light emission efficiency.
2Illumination intensity
If several LEDs are integrated to reduce size and secure brightness, then device size is reduced and brightness is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple light-emitting diodes are integrated into a single pixel structure with shared electrode patterns and common reflective surfaces. This merging approach allows multiple LEDs to work together to achieve high brightness while being manufactured as a unified structure, reducing the complexity that would arise from treating each LED as a separate component requiring individual assembly.
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 can be manufactured more simply and achieves improved light emission efficiency by increasing the arrangement area of light-emitting elements and utilizing integrated reflective electrodes.
Implementation Method 1
The metal conductive layer may include a reflective material, and light emitted from the light-emitting elements may be reflected by the metal conductive layer.
Data Source
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AI summary
A light emitting device comprises: a substrate; a first electrode which is arranged on the substrate, includes holes, and has inclined surfaces formed along the peripheries of the holes; second electrodes arranged on the substrate and positioned in the holes of the first electrode, respectively; and light emitting elements positioned between the first electrode and the second electrodes, and electrically connected to the first electrode and the second electrodes.