Layered Link Lines in Display Devices Prevent Short-Circuits
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Solution Overview
Problem
In display devices, the proximity of link lines in the non-display region often leads to short-circuits due to defects during formation, causing signal interference and reduced product yield, and the single-layered structure of link lines results in high resistance, degrading display quality.
Innovation Solution
The implementation of a display device with a substrate featuring first and second layered link lines separated by insulating layers, preventing short-circuits between neighboring lines and reducing resistance by alternating their layers and widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If link lines are formed in a single layer to simplify manufacturing, then ease of manufacture is improved, but the resistance of power voltage transmission increases and short-circuit risk increases
Solution Approach 1:
The patent transitions from a single-layer link line structure to a multi-layer structure where link lines are formed on different layers (first link lines on substrate, second link lines on insulating layer). This dimensional change allows power voltage transmission through multiple paths, reducing resistance while maintaining manufacturing simplicity through standardized layer formation processes.
Solution Approach 2:
The link lines are segmented into multiple independent layers (first link lines and second link lines) rather than forming a single continuous layer. This segmentation allows each layer to carry specific signals, with power link lines distributed across layers to reduce overall resistance and prevent short-circuits through spatial separation.
2Area of stationary object
If link lines are positioned close together to save space, then area is reduced, but short-circuit risk increases due to manufacturing defects
Solution Approach 1:
The patent utilizes vertical layering to separate link lines that would otherwise need to be spaced far apart horizontally. By forming first link lines on the substrate and second link lines on an insulating layer, the design achieves compact horizontal spacing while maintaining vertical separation through the insulating layer, thus reducing area without compromising reliability.
Solution Approach 2:
An insulating layer is introduced as an intermediary between first link lines and second link lines. This insulating layer acts as a mediator that prevents short-circuits between adjacent link lines while allowing them to be positioned close together, thus saving space while maintaining reliability through defect tolerance.
3Reliability
If insulating layer is formed between link lines to prevent short-circuit, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The insulating layer serves multiple functions simultaneously: it provides electrical isolation between first and second link lines to prevent short-circuits, supports the second link lines structurally, and enables the multi-layer configuration. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in manufacturing complexity while achieving improved reliability.
Data Source
AI summary
A display device includes a substrate, a plurality of first layered link lines spaced apart from each other on the substrate, a first insulating layer on the plurality of first layered link lines, a plurality of second layered link lines spaced apart from each other on the first insulating layer, each second layered link line between neighboring first layered link lines, a second insulating layer on the plurality of second layered link lines, and a plurality of data lines or a plurality of gate lines connected to the plurality of first layered link lines and the plurality of second layered link lines.