Display Panel Isolation Layer for Moisture-Stable Pixels
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Solution Overview
Problem
The issue of gases such as water and oxygen entering the light-emitting layer from the pixel definition layer causes failure and shrinkage of pixels, leading to defects like darkening and color shift on the screen, affecting product yield and service life.
Innovation Solution
A display panel design that includes a substrate with a pixel definition layer having a through hole and an isolation layer between the light-emitting layer and the pixel definition layer, using materials like metal and metal oxides to prevent gas ingress, and a self-repairing layer to repair cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light-emitting layer is in direct contact with the pixel definition layer, then the device structure is simple, but gases such as water and oxygen from the pixel definition layer can enter the light-emitting layer and cause failure
Solution Approach 1:
An isolation layer is introduced as an intermediary between the pixel definition layer and the light-emitting layer. This isolation layer acts as a barrier that prevents gases (water and oxygen) from the pixel definition layer from penetrating into the light-emitting layer, thereby protecting the light-emitting layer from degradation while maintaining a relatively simple overall device structure.
2Reliability
If an isolation layer is added between the light-emitting layer and pixel definition layer, then gas protection is improved, but device complexity increases
Solution Approach 1:
The isolation layer is implemented as a thin film structure that provides effective gas barrier protection. This thin film approach allows the isolation layer to be integrated into the existing device structure without adding significant thickness or complexity, while still effectively blocking gases from reaching the light-emitting layer.
3Stability of the object's composition
If the pixel definition layer releases gases under environmental factors, then the material properties are maintained, but the light-emitting layer reacts with gases causing pixel shrinkage and darkening
Solution Approach 1:
The isolation layer serves as a protective intermediary that allows the pixel definition layer to maintain its material properties and release gases under environmental factors, while simultaneously blocking these gases from reaching and damaging the light-emitting layer. This resolves the contradiction by protecting the light-emitting layer from harmful gas reactions without constraining the pixel definition layer's material behavior.
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
Prevents light-emitting layer failure by blocking gas ingress and repairs cracks, enhancing pixel stability and improving display panel performance.
Implementation Method 1
gases such as water and oxygen released from the bank can directly enter the light-emitting layer and react with a light-emitting material
Data Source
AI summary
The present application discloses a display panel and a manufacturing method thereof. The display panel includes a substrate, a pixel definition layer and a light-emitting layer. The pixel definition layer is disposed on the substrate. The pixel definition layer is provided with a first through hole, the first through hole penetrates through the pixel definition layer, the light-emitting layer is disposed in the first through hole, and an isolation layer is disposed between the light emitting layer and the pixel definition layer.