Pixel Electrode Hole Structure for Efficient Light-Emitting Arrays
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Solution Overview
Problem
The manufacturing process of light-emitting devices is complicated due to the formation of walls and reflective electrodes, and there is a need for a simplified process that also improves light emission efficiency.
Innovation Solution
A light-emitting device is designed with a substrate, a first electrode having holes with inclined surfaces, and second electrodes positioned within these holes. The device includes light-emitting elements electrically connected to both electrodes, and a method for manufacturing this device involves forming an electrode layer, patterning it to create independent pixel electrodes and unseparated electrode patterns, aligning light-emitting elements using an electric field, and patterning the unseparated electrode patterns to form a second pixel electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If walls and reflective electrodes are formed around light-emitting diodes to increase light emission efficiency, 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 layer is formed to surround the light-emitting element and simultaneously provides both the wall structure for mechanical support and the reflective surface for light redirection, eliminating the need for separate wall and reflective electrode formation processes
Solution Approach 2:
The electrode layer serves multiple functions: it acts as a structural wall surrounding the light-emitting element, provides electrical connection, and functions as a reflective surface to redirect light. This multi-functional design simplifies the overall device structure and manufacturing process while maintaining light emission efficiency
2Illumination intensity
If multiple separate components (walls, reflective electrodes) are formed to improve light emission, then light emission efficiency is improved, but the number of manufacturing steps increases
Solution Approach 1:
The patent combines multiple separate components (walls and reflective electrodes) into a single integrated electrode layer structure, reducing the number of manufacturing steps and improving production efficiency while maintaining the light emission enhancement function
3Ease of manufacture
If traditional electrode structures are used, then manufacturing is simpler, but electrical signal drop increases and alignment efficiency decreases
Solution Approach 1:
The patent transitions from a planar electrode structure to a three-dimensional electrode layer that surrounds the light-emitting element. This dimensional change provides both mechanical support for alignment and multiple electrical connection points, reducing signal drop while maintaining manufacturing feasibility
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 design allows for a more simplified manufacturing process and improves light emission efficiency by increasing the arrangement area for light-emitting elements and reducing electrical signal drop, leading to enhanced alignment efficiency and display quality.
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
Implementation Method 2
aligning light-emitting elements using an electric field
Data Source
AI summary
A light emitting device comprises: a substrate; a first electrode on the substrate, the first electrode having holes, and having inclined surfaces along the peripheries of the holes; second electrodes on the substrate, each of which is in a respective one of the holes of the first electrode; and light emitting elements between the first electrode and the second electrodes, the light-emitting elements being electrically connected to the first electrode and the second electrodes.