Array Substrate Common Electrode Lead Segmentation for Signal Resistance
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Solution Overview
Problem
Current liquid crystal display (LCD) technologies face challenges with excessive common electrode signal resistance leading to signal delay and poor display quality, especially in large-sized, low-resolution displays with high refresh rates.
Innovation Solution
The proposed solution involves an array substrate design with a base, common electrode lead groups, and a common electrode connection line. The connection group includes multiple connectors that can be electrically connected to the common electrode leads, allowing for adjustable common electrode lead configurations to optimize signal resistance and delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common electrode lead is used to reduce device complexity, then manufacturing is simpler, but common electrode signal resistance increases causing signal delay
Solution Approach 1:
The patent divides the common electrode lead connection into multiple segments: individual common electrode leads extending from different sides of the active area, multiple connection lines in the non-active area, and multiple connectors. This segmentation allows the signal to be distributed through multiple parallel paths, reducing overall signal resistance while maintaining manageable device complexity through modular construction.
Solution Approach 2:
The patent transitions from a single-dimensional connection (one lead from one side) to a multi-dimensional configuration by placing common electrode leads on multiple sides of the active area and routing connection lines through the non-active area. This spatial distribution across different dimensions reduces signal path length and resistance without significantly increasing manufacturing complexity.
2Reliability
If multiple common electrode leads are added to reduce signal resistance, then signal transmission improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The non-active area serves multiple functions: it houses the common electrode connection lines, contains the connection groups with connectors, and provides routing space for multiple common electrode leads. This multi-functional use of the non-active area accommodates the increased lead configuration without proportionally increasing overall device complexity.
Solution Approach 2:
The patent designs the connection lines and connectors to establish equipotential connections between the common electrode leads and the common electrode. By ensuring equal potential distribution through symmetric connector arrangements and balanced connection line routing, the system achieves reliable signal transmission while the modular connector design keeps manufacturing complexity manageable.
3Reliability
If the common electrode connection line width is increased to reduce resistance, then signal transmission improves, but the overlap with pixel electrodes increases affecting display quality
Solution Approach 1:
The connection group is segmented into multiple connectors rather than using a single wide connection line. This segmentation allows the signal to be transmitted through multiple narrower parallel paths, achieving low resistance without creating a single wide overlap region that would affect pixel electrode performance and display quality.
Solution Approach 2:
The patent resolves the width conflict by distributing the connection across multiple dimensions: multiple connection lines extending in different directions, multiple connectors positioned at different locations, and routing through the non-active area. This multi-dimensional approach achieves equivalent or better electrical performance without any single connection element overlapping pixel electrodes and degrading display quality.
Data Source
AI summary
An array substrate, including: a base; common electrode lead groups in the active area and on a side of the base, where at least one common electrode lead group includes at least one first common electrode lead extending in a first direction, and the common electrode lead groups are arranged in a second direction; and at least one common electrode connection line, which is in the non-active area, on the same side of the base as the first common electrode lead, and extends in the second direction; where a connection group is provided at a position of the common electrode connection line opposite to an end of at least one of the common electrode lead groups, the connection group includes a plurality of connectors, and the number of connectors in the connection group is not less than the number of first common electrode leads in the common electrode lead groups.