LCD Panel ESD Structure via Silver Paste GND Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal display panels face challenges with electrostatic discharge, as high-resistance shield layers hinder the dissipation of static electricity generated during film tearing or ESD tests, leading to prolonged discharge times and interference with touch signals.
Innovation Solution
A conductive material layer is applied around the high-resistance film on the glass panel, connected to the TFT substrate's GND pin via conductive silver paste, increasing the contact area and accelerating electrostatic discharge without affecting display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a high-resistance shield layer is used to shield electrostatic impact, then the display performance is improved, but the static electricity dissipation time is prolonged
Solution Approach 1:
The patent applies different resistance characteristics to different regions: the central area uses high-resistance ITO transparent conductive film for electrostatic shielding while maintaining touch signal transmission, while the peripheral area uses low-resistance silver paste for rapid static electricity dissipation. This local differentiation resolves the contradiction by optimizing each region's function according to its specific requirements.
Solution Approach 2:
The conductive layer is segmented into two distinct parts: the ITO layer covering the display area for shielding and touch functionality, and the silver paste layer at the periphery for ESD discharge. This segmentation allows each material to perform its specialized function without compromising the other, addressing both the shielding requirement and the dissipation speed requirement.
2Loss of time
If the area of silver paste is increased to speed up discharge, then the static electricity dissipation is improved, but the process complexity and cost increase
Solution Approach 1:
The silver paste is strategically placed only in the peripheral region where ESD discharge is needed, rather than increasing its area across the entire display. This localized application achieves effective static electricity dissipation while minimizing process complexity and material usage.
3Ease of operation
If a high-resistance shield layer is used, then the touch signal transmission is improved, but the static electricity generation during film tearing is amplified
Solution Approach 1:
The conductive system is divided into two functional segments: the high-resistance ITO layer that maintains touch signal transmission characteristics, and the low-resistance silver paste layer that provides a discharge path for static electricity generated during film tearing or handling, thereby resolving the contradiction between touch functionality and static electricity management.
Solution Approach 2:
The silver paste acts as an intermediary discharge path that intercepts static electricity before it can accumulate and cause harmful effects. It mediates between the high-resistance ITO layer that needs to maintain touch functionality and the external environment that generates static electricity during handling.
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
This solution significantly reduces static electricity dissipation time and enhances the antistatic ability of the liquid crystal display panel, making it easier to measure the conductive status and maintain, while maintaining display performance.
Implementation Method 1
the conductive material layer is connected to a GND pin of the TFT substrate through a conductive silver paste
Data Source
AI summary
The present disclosure discloses an electrostatic discharge structure of a LCD panel for mounting on a LCD panel with a high-resistance film, wherein the LCD panel includes a glass layer on an uppermost layer of the LCD panel covered with a high-resistance film, an edge reserved around the high-resistance film, and a conductive material layer arranged on the edge reserved on the glass panel, wherein the conductive material layer is in contact with a periphery of the high-resistance film, and the conductive material layer is connected to a GND pin of the TFT substrate through a conductive silver paste. The present disclosure also discloses a LCD panel and a LCD device. According to the embodiments of the present disclosure which can speed up the discharge of static electricity and greatly improve the static electricity generated by the tearing film and the coating film.