Electro-Optical Layer Layout for Ionic Impurity Containment
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Solution Overview
Problem
Existing electro-optical devices with concave ion adsorption portions fail to adequately suppress deterioration in display quality due to ionic impurities.
Innovation Solution
Incorporating a first and second electrode with different potentials and a concave-convex member between them to attract and contain ionic impurities outside the display region, using transparent conductive films like ITO or IZO, and configuring the concave-convex members to be taller than the electrodes to prevent impurity migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a concave ion adsorption portion is provided on the substrate surface, then ionic impurities can be adsorbed to some extent, but the suppression of deterioration in display quality is insufficient
Solution Approach 1:
A concave-convex member is introduced as an intermediary component between the substrate and the electrode. This member includes a concave portion that actively adsorbs ionic impurities through its porous structure, preventing them from reaching the electro-optical layer. The concave-convex member acts as a mediator that intercepts and contains harmful ions before they can cause deterioration.
Solution Approach 2:
The ion adsorption function is extended from a two-dimensional surface treatment to a three-dimensional structure. The concave-convex member with its deep concave portions and porous architecture provides volumetric adsorption capacity, allowing ionic impurities to be trapped in multiple dimensions (surface adsorption + pore absorption + depth containment).
2Reliability
If the concave-convex member is made taller than the electrode, then impurity migration is prevented, but device complexity increases
Solution Approach 1:
The concave-convex member is designed with a height greater than the electrode in advance, creating a protective barrier before ionic impurities can migrate to the electro-optical layer. This preliminary structural configuration ensures that even if impurities attempt to move through the electrode, they are blocked by the taller concave-convex member, preventing them from reaching sensitive components.
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
Effectively prevents ionic impurities from entering the display region, thereby enhancing the display quality and longevity of the electro-optical device.
Implementation Method 1
a first electrode disposed outside a pixel region, a second electrode disposed outside the pixel region and applied with a potential different from that of the first electrode
Implementation Method 2
The ion adsorption portion adsorbs ionic impurities in the electro-optical substance
Data Source
AI summary
An electro-optical device includes an electro-optical layer, a first electrode disposed outside a pixel region, a second electrode disposed outside the pixel region and applied with a potential different from that of the first electrode, and a concave-convex member disposed between the first electrode and the second electrode in plan view.