Display Panel Mesh Shielding for Stable Transistor Characteristics
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Solution Overview
Problem
Conventional display devices experience deteriorated display quality due to electric field-induced polarization of organic materials in the display panel, which affects the electrical properties of transistors, exacerbated by light incidence.
Innovation Solution
Incorporation of a shielding pattern with a mesh structure between the substrate and active pattern in the display panel to shield the active pattern from polarized organic materials, maintaining electrical characteristics of transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding pattern is added to prevent polarization of organic materials, then display quality is improved, but device complexity increases
Solution Approach 1:
A shielding pattern is introduced as an intermediary component between the organic film layer and the active pattern. This shielding pattern includes a first shielding pattern disposed on the first barrier layer and a second shielding pattern disposed on the second barrier layer, which together prevent polarized organic materials from affecting the active pattern's electrical properties, thereby improving display quality without requiring fundamental redesign of the display panel structure.
Solution Approach 2:
The shielding function is divided into multiple segments: a first shielding pattern and a second shielding pattern positioned at different locations and orientations. The first shielding pattern extends in a first direction while the second shielding pattern extends in a second direction crossing the first direction, creating a comprehensive shielding network that addresses polarization from multiple angles while maintaining structural organization.
2Stability of the object's composition
If multiple barrier layers and shielding patterns are added to block polarized organic materials, then electrical characteristics stability is improved, but manufacturing complexity increases
Solution Approach 1:
The shielding structure is segmented into a first shielding pattern and a second shielding pattern that are formed in different directions. The first shielding pattern extends in a first direction and the second shielding pattern extends in a second direction crossing the first direction, allowing for systematic manufacturing processes that can handle each pattern type separately while achieving comprehensive shielding效果.
Solution Approach 2:
The shielding solution operates in the spatial dimension by introducing patterns at different orientations and positions. The first shielding pattern and second shielding pattern are disposed at different locations and extend in different directions, creating a multi-dimensional shielding architecture that effectively blocks polarized organic materials from reaching the active pattern.
3Object-affected harmful factors
If shielding patterns are disposed to completely overlap gate electrode and active pattern, then protection effectiveness is improved, but area utilization decreases
Solution Approach 1:
The shielding patterns are strategically positioned to provide localized protection where it is most needed. The first shielding pattern is disposed to overlap the gate electrode and first active pattern, while the second shielding pattern is disposed to overlap the second active pattern, creating targeted shielding zones that protect critical areas without unnecessarily covering the entire display panel area.
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 shielding pattern effectively prevents the formation of back channels in the active pattern, thereby maintaining stable electrical characteristics and improving display quality.
Implementation Method 1
Organic materials included in the organic film layer of the display panel may be polarized by the electric field. The polarized organic materials may affect electrical properties of the active pattern of the display panel.
Implementation Method 2
Incorporation of a shielding pattern with a mesh structure between the substrate and active pattern in the display panel to shield the active pattern from polarized organic materials
Data Source
AI summary
A display panel includes a substrate, a first barrier layer disposed on the substrate, a shielding pattern disposed on the first barrier layer, a second barrier layer covering the shielding pattern and disposed on the first barrier layer, a first active pattern disposed on the second barrier layer and overlapping the shielding pattern in a plan view, a gate electrode disposed on the first active pattern, an emission control line disposed on the first active pattern and adjacent to one side of the gate electrode in a plan view, and an upper compensation control line disposed on the emission control line and adjacent to the other side of the gate electrode in a plan view.