OLED Anode Electrode Design for Reflective Electrode Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing organic light-emitting diode (OLED) display devices face defects and reduced reflectivity due to corrosion or precipitation of reflective electrodes made of silver and aluminum during etching and heat treatment processes, leading to decreased luminous efficiency and leakage paths between pixel areas.
Innovation Solution
The OLED display device design includes an anode electrode that covers the upper surface and sides of the reflective electrode, preventing exposure during subsequent processes and forming trenches in the interlayer insulation film to block leakage currents, thereby maintaining reflectivity and efficiency without additional processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reflective electrode is exposed by preforming subsequent processes, then the manufacturing process can proceed, but corrosion or precipitation of the reflective electrode occurs during etching and heat treatment processes
Solution Approach 1:
The anode electrode is formed to extend and cover the sides of the reflective electrode before subsequent etching and heat treatment processes. This preliminary protective action prevents corrosion and precipitation of the reflective electrode during these processes, while still allowing the manufacturing process to proceed normally
2Ease of manufacture
If the reflective electrode is exposed, then subsequent processes can be performed, but the degree of reflectivity decreases due to corrosion or precipitation
Solution Approach 1:
The anode electrode is designed to extend and cover the sides of the reflective electrode in advance, creating a protective barrier before subsequent processes. This prevents corrosion and precipitation that would reduce reflectivity, while maintaining ease of manufacture through integrated electrode design
3Productivity
If the reflective electrode is exposed, then manufacturing can continue, but leakage paths form between adjacent pixel areas
Solution Approach 1:
The anode electrode is formed to extend and cover the sides of the reflective electrode before subsequent processes, creating a protective barrier that prevents leakage paths between adjacent pixel areas while maintaining manufacturing continuity
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 solution prevents defects in the reflective electrode, maintains luminous efficiency, and reduces leakage currents between pixel areas, enhancing the overall performance and manufacturing efficiency of the OLED display device.
Implementation Method 1
prevents certain defects from occurring at a reflective electrode during manufacturing
Implementation Method 2
defect or loss caused by corrosion or precipitation of a reflective electrode that comprises silver and/or aluminum
Implementation Method 3
the degree of reflectivity and luminous efficiency are prevented from decreasing
Implementation Method 4
light is generated when the generated excitons go from an excited state into a ground state
Implementation Method 5
blocks a lateral leakage current path between adjacent pixel areas
Data Source
AI summary
Provided is an organic light-emitting diode display device (100) in which an anode electrode (134) extends to cover sides of a reflective metal (131) below the anode electrode (134).