Display Panel Mesh Lower Pattern Shields Polarized Organic Materials
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Solution Overview
Problem
The display quality of existing display devices is deteriorated due to the polarization of organic materials in the display panel, which affects the electrical characteristics of transistors and is further exacerbated by light incident on the panel.
Innovation Solution
A display panel with a lower pattern having a mesh shape and a disconnection area is introduced, which shields the active pattern from polarized organic materials, preventing electrical influences and maintaining the electrical characteristics of transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic materials are used in the organic film layer, then the display device can be manufactured with standard processes, but the organic materials become polarized by electric fields and light, deteriorating display quality
Solution Approach 1:
A lower pattern layer is introduced as an intermediary between the organic film layer and the active pattern. This lower pattern blocks the polarized organic materials from directly contacting and affecting the active pattern, thereby preventing the harmful electrical effects while allowing the organic materials to remain in the structure for manufacturing purposes
2Reliability
If a continuous lower pattern is used to block polarized organic materials, then electrical characteristics are protected, but crosstalk between signal lines increases
Solution Approach 1:
The lower pattern is designed with a mesh shape consisting of disconnected segments rather than a continuous structure. The pattern includes first and second patterns extending in different directions with disconnection areas between them, which blocks polarized organic materials while reducing the conductive path that causes crosstalk between signal lines
3Object-affected harmful factors
If the lower pattern completely covers the active pattern, then shielding effect is maximized, but the structure becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The lower pattern is strategically positioned to extend in first and second directions that are perpendicular to each other, creating a mesh-like structure that provides shielding at critical locations where polarized organic materials would most directly affect the active pattern, rather than requiring complete coverage
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 implementation of the lower pattern with a mesh shape and disconnection area improves the display quality by preventing changes in transistor electrical characteristics and reducing crosstalk, thereby enhancing the overall performance of the display device.
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 have an electrical effect on the active pattern of the display panel.
Data Source
AI summary
A display device includes a substrate, a first barrier layer on the substrate, a lower pattern on the first barrier layer and having a mesh shape defining a disconnection area, a second barrier layer on the first barrier layer, covering the lower pattern, and contacting the first barrier layer in the disconnection area, and a first active pattern on the second barrier layer and overlapping the lower pattern, a gate electrode on the first active pattern and overlapping the lower pattern, a first gate line on the first active pattern extending in a first direction, a second active pattern on the first gate line, a second gate line on the second active pattern extending in the first direction, and a data line on the second gate line extending in a second direction crossing the first direction.