Array Substrate Alignment Wire Segregation for Electrostatic Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing miniaturization of electronic components and higher electrostatic sensitivity in TFT-LCD display panels lead to a higher risk of electrostatic discharge, causing device failures and affecting product yield and reliability.
Innovation Solution
An array substrate design with separate high and low potential alignment wires and pads, where each wire connects to a corresponding pad, and the wires are arranged to avoid overlapping projections, reducing cross-line regions with large potential differences and minimizing electrostatic short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alignment wires are arranged to connect to alignment pads for liquid crystal alignment, then the liquid crystal alignment process can be completed, but electrostatic discharge is likely to happen at cross-line regions causing wire damage
Solution Approach 1:
The alignment wires are segmented into high potential alignment wires and low potential alignment wires based on their connected alignment pads. High potential alignment wires connect to high potential alignment pads (CF-com, Vss) while low potential alignment wires connect to low potential alignment pads (A-com, CK1-CK6, LC1-LC2, ST, R-G-B). This segmentation separates wires with different potentials to avoid cross-line electrostatic discharge.
Solution Approach 2:
Different regions of the alignment wire layout are assigned different potential characteristics. The high potential alignment wires are positioned in regions connecting to high potential pads, while low potential alignment wires are positioned in regions connecting to low potential pads. This local differentiation of potential quality prevents harmful electrostatic interactions at cross-line regions.
2Ease of operation
If multiple alignment wires are used to achieve proper alignment, then the alignment function is improved, but the risk of cross-line electrostatic short circuits increases
Solution Approach 1:
The alignment wire system is segmented by potential level, with high potential alignment wires dedicated to high potential pads and low potential alignment wires dedicated to low potential pads. This segmentation maintains the necessary alignment functionality while eliminating the electrostatic short circuit risk associated with mixed-potential cross-line configurations.
3Adaptability or versatility
If alignment wires are densely arranged to cover all alignment pads, then the alignment coverage is improved, but the electrostatic sensitivity and discharge risk increase
Solution Approach 1:
The alignment wire arrangement is segmented by potential zones rather than uniform density. High potential alignment wires are arranged to cover high potential alignment pads, and low potential alignment wires are arranged to cover low potential alignment pads. This segmented arrangement achieves comprehensive alignment coverage while reducing electrostatic sensitivity by preventing dense mixing of different potential wires.
Data Source
AI summary
An array substrate, a display panel, and a display device are disclosed. The array substrate includes a display region and a non-display region, the non-display region includes a plurality of alignment wires and a plurality of alignment pads; wherein each alignment pad electrically connects to a corresponding alignment wire, and the high potential alignment wire electrically connects to the high potential pad and the low potential alignment wire electrically connects to the low potential pad, the high potential alignment wire is disposed on one side of the plurality of alignment pads and the low potential alignment wire is disposed on an opposite side of the plurality of alignment pads. In the above manner, the present disclosure can reduce the risk of generating static electricity between the alignment wires and improve the electrostatic protection capability of the product.