Plasma-Modified Resin Substrate for Afterimage-Resistant Display Panels
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Solution Overview
Problem
Existing display panels face challenges in maintaining display quality and reliability while minimizing manufacturing costs, particularly in flexible panels that require bending, where electrical fields can cause issues like afterimages and dipole moments affecting pixel performance.
Innovation Solution
A display panel design incorporating a substrate with a multi-layered structure of resin and barrier layers, where the upper portion of the second resin layer is made conductive through plasma treatment, blocking electrical fields and preventing dipole moments, while maintaining flexibility and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layered substrate structure with conductive resin layer is used to block electrical fields and reduce afterimages, then display quality and reliability are improved, but manufacturing process complexity increases
Solution Approach 1:
The resin layer is designed with non-uniform carbon content distribution, where the upper portion has higher carbon content (more conductive) and the lower portion has lower carbon content (less conductive). This local quality variation allows the layer to block electrical fields effectively at the interface with the barrier layer while maintaining flexibility and reducing manufacturing complexity compared to fully conductive structures.
Solution Approach 2:
The substrate employs a composite structure combining organic resin layers with inorganic barrier layers. The resin layers contain varying carbon contents to provide different conductivity levels, while the barrier layers provide moisture and oxygen protection. This composite approach achieves both electrical field blocking and environmental protection functions.
2Reliability
If plasma treatment is applied to increase carbon content and conductivity in the resin layer, then electrical field blocking capability is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The carbon content in the resin layer is controlled by adjusting plasma treatment parameters including power, gas flow rate, treatment time, and carbon source concentration. By optimizing these parameters, the upper portion of the resin layer achieves the required conductivity for electrical field blocking without excessive treatment that would increase cost and complexity.
Solution Approach 2:
Plasma treatment is applied selectively to create a gradient in carbon content, with the upper portion having higher carbon content than the lower portion. This partial action approach treats only the necessary region to achieve electrical field blocking capability without uniformly treating the entire resin layer, reducing manufacturing cost and process complexity.
3Reliability
If the upper portion of the second resin layer is made conductive to block electrical fields, then afterimages are reduced, but the flexibility of the display panel may be compromised
Solution Approach 1:
The resin layer structure features local quality variation with higher carbon content in the upper portion and lower carbon content in the lower portion. This gradient structure provides sufficient conductivity at the interface with the barrier layer to block electrical fields and reduce afterimages, while the lower carbon content region maintains the flexibility required for bendable display panels.
Solution Approach 2:
The carbon content parameter is spatially varied within the resin layer through controlled plasma treatment. By adjusting the plasma treatment conditions and duration, the upper portion achieves the minimum required conductivity for afterimage reduction while the overall resin layer composition remains flexible enough to enable panel bending.
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
The conductive upper portion of the second resin layer enhances display quality by reducing afterimages and improving reliability, while simplifying the manufacturing process and reducing costs by using existing equipment and lower vacuum levels.
Implementation Method 1
performing a plasma treatment on an upper surface of the second resin layer
Implementation Method 2
A carbon content of the upper portion of the second resin layer may be reduced by the performing of the plasma treatment
Implementation Method 3
an oxygen content of the upper portion of the second resin layer may be greater than an oxygen content of the lower portion of the second resin layer
Data Source
AI summary
A display panel according to an embodiment includes a substrate, a thin film transistor disposed on the substrate, and a light emitting element electrically connected to the thin film transistor. The substrate includes a first resin layer, a first barrier layer disposed on the first resin layer, a second resin layer including a lower portion disposed on the first barrier layer and an upper portion having a carbon content less than a carbon content of the lower portion, and a second barrier layer disposed on the second resin layer.