Reflective Bank and Electrode Structure for High-Temperature Pixels
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Solution Overview
Problem
Current display devices face challenges in enhancing optical efficiency of pixels, particularly in high-temperature environments, where existing technologies struggle to maintain durability and efficiency.
Innovation Solution
The proposed solution involves a display device structure with specific layers and manufacturing method, including a substrate with internal banks, reflective layers made of materials like silver, copper, or aluminum, and electrodes with transparent conductive oxides, arranged to improve reflectance and transmittance, and a method of forming these layers using etching processes to enhance optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic light emitting diodes are used to improve durability and blue light efficiency, then reliability and optical efficiency are improved, but manufacturing complexity increases
Solution Approach 1:
The device is divided into distinct functional layers including substrate, internal banks, reflective layers, insulating layers, electrodes, and light emitting elements. This segmentation allows each component to be optimized independently for its specific function while maintaining overall system reliability.
Solution Approach 2:
The patent employs composite material structures including transparent conductive oxides for electrodes, metallic reflective layers (silver, copper, or aluminum), and layered insulating materials. These composite structures achieve both high optical efficiency and durability without requiring complex manufacturing processes.
2Use of energy by moving object
If reflective layers with high reflectance are used to improve optical efficiency, then light utilization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the optical parameters of reflective layers by selecting materials with inherently high reflectance properties (silver, copper, or aluminum) and controlling their thickness and positioning. This approach achieves high optical efficiency through material selection rather than requiring extremely precise manufacturing tolerances.
Solution Approach 2:
Insulating layers are introduced as intermediary elements between the reflective layers and electrodes, allowing optical optimization of the reflective layers while maintaining electrical insulation and structural integrity. This mediator approach decouples the manufacturing precision requirements for optical and electrical functions.
3Use of energy by moving object
If transparent conductive oxides are used for electrodes to improve transmittance, then optical efficiency is improved, but electrical conductivity may be reduced
Solution Approach 1:
The electrode structure uses transparent conductive oxides as the primary conductive material, leveraging their unique property of combining transparency with electrical conductivity. This composite material approach resolves the trade-off between optical efficiency and electrical conductivity that would exist with traditional metallic electrodes.
Solution Approach 2:
The patent applies different material properties to different regions and functions: transparent conductive oxides are used where both transparency and conductivity are needed (electrodes), while highly reflective metals are used where only reflectance is critical (reflective layers). This local optimization of material quality achieves overall system performance.
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 results in improved optical efficiency of pixels, maintaining performance even in high-temperature environments, by optimizing reflectance and transmittance properties of the reflective and electrode layers.
Implementation Method 1
a reflectance of the first reflective layer may be higher than a reflectance of the first electrode, and the reflectance of the second reflective layer may be higher than a reflectance of the second electrode
Implementation Method 2
a transmittance of the first electrode may be higher than a transmittance of the first reflective layer, and a transmittance of the second electrode may be higher than a transmittance of the second reflective layer
Data Source
AI summary
A display device includes: a first internal bank and a second internal bank spaced apart on a substrate; a first reflective layer disposed on the first internal bank; a second reflective layer spaced apart from the first reflective layer and disposed on the second internal bank; a first insulating layer disposed on the first reflective layer and the second reflective layer; a first electrode disposed on the first insulating layer and overlapping the first reflective layer; a second electrode disposed on the first insulating layer, overlapping the second reflective layer, and being spaced apart from the first electrode; a second insulating layer disposed on the first electrode and the second electrode; and a light emitting element disposed on the second insulating layer and overlapping a space between the first electrode and the second electrode.