Display Panel Shielding Layout for Organic Polarization Blocking
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Solution Overview
Problem
The generation of electric fields due to signals and voltages in a display panel can polarize organic materials in the base substrate, affecting the transistor layer and deteriorating display quality.
Innovation Solution
Incorporating a shielding pattern between the first and second barrier layers within the base substrate, which overlaps with the gate electrode and other active patterns, to prevent the polarization of organic materials and maintain electrical characteristics of the transistor.
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:
The shielding pattern is nested within the base substrate structure, specifically positioned between the first and second barrier layers. This integration allows the shielding function to be incorporated into the existing substrate architecture without adding separate external components, thereby improving display quality while minimizing increases in overall device complexity.
Solution Approach 2:
The shielding pattern acts as an intermediary layer between the organic materials and the transistor layer, blocking the polarization effect from propagating. This mediator approach effectively protects the organic materials from electric field-induced polarization while maintaining the functional integrity of the transistor layer, resolving the contradiction between reliability improvement and device complexity.
2Object-affected harmful factors
If the shielding pattern is made larger to enhance shielding effect, then polarization prevention is improved, but manufacturing precision requirements increase
Solution Approach 1:
The shielding pattern is designed with non-uniform dimensions, where the first dimension (width) is greater than the second dimension (length). This local quality variation optimizes the shielding effect in the direction where polarization impact is most severe, while reducing the pattern size in directions where excessive shielding is unnecessary. Consequently, the shielding effectiveness is enhanced without proportionally increasing manufacturing precision requirements across all dimensions.
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 transistor layer from being electrically affected by polarization, thereby improving the display quality of the display panel.
Implementation Method 1
an electric field may be generated by a signal and/or a voltage provided to the transistor layer
Implementation Method 2
Organic materials included in the base substrate may be polarized by the electric field
Data Source
AI summary
A display panel includes a first organic film layer, a first barrier layer disposed on first organic film layer, a shielding pattern disposed on the first barrier layer, a second barrier layer covering the shielding pattern and disposed on 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 a first side of the gate electrode in the plan view, an upper compensation control line disposed on the emission control line and adjacent to a second side of gate electrode in the plan view, and a second active pattern disposed on the emission control line.