Display Panel ESD Connector Layout for Narrow-Bezel Reliability
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Solution Overview
Problem
The electrostatic accumulation on the color film substrate of liquid crystal display devices leads to poor contact between the transparent conductive layer and the ground terminal, causing abnormal displaying due to ineffective discharge of static charges.
Innovation Solution
A display panel design with a first and second region, featuring an array substrate with an electrostatic discharge portion and a color film substrate edge inwardly retracted, along with electrical connectors and a sealant arrangement to facilitate timely discharge of static charges through a series of connectors, including a first, second, and third electrical connectors, ensuring efficient electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silver adhesive is used to connect the transparent conductive layer to the ground terminal, then the static charges can be led out, but the silver adhesive is easily oxidized, corroded, or detached causing poor contact
Solution Approach 1:
The patent introduces a conductive adhesive as an intermediary material between the transparent conductive layer and the ground terminal, replacing the problematic silver adhesive. This conductive adhesive serves as a mediator that maintains stable electrical connection without suffering from oxidation and detachment issues, thus resolving the reliability-stability contradiction
Solution Approach 2:
The patent employs a composite material solution by using a conductive adhesive that combines the properties of adhesion and electrical conductivity. This composite material integrates the functions of mechanical bonding and electrical conduction in a single stable material, eliminating the need for silver adhesive while maintaining effective static charge discharge
2Reliability
If the color film substrate edge is inwardly retracted, then the electrostatic discharge path is improved, but the frame width is reduced
Solution Approach 1:
The patent resolves the contradiction by transitioning the electrostatic discharge connection from a planar arrangement to a three-dimensional arrangement. The electrical connectors extend along the side surface of the color film substrate, utilizing the vertical dimension to achieve effective electrostatic discharge while maintaining a compact frame width
3Reliability
If the third electrical connector is positioned closer to the array substrate, then the electrostatic discharge efficiency is improved, but the connector may overlap with the bonding portion
Solution Approach 1:
The patent divides the display panel into distinct functional regions: a first region for the color film substrate and a second region for the electrostatic discharge components. This segmentation allows the third electrical connector to be positioned in the second region where it can efficiently discharge static charges without interfering with the bonding portion in the first region, thus resolving the contradiction between discharge efficiency and structural complexity
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 design effectively discharges static charges, preventing electrostatic concentration and improving display panel performance by reducing frame width and avoiding issues like oxidation and detachment of connectors, thereby enhancing display quality.
Implementation Method 1
the third electrical connector is electrically connected to the second electrical connector and the electrostatic discharge portion
Data Source
AI summary
A display panel and a display device are provided. The display panel includes an array substrate, a color film substrate, and a first electrical connector, a second electrical connector, and a third electrical connector that are electrically connected with each other. The first electrical connector is provided on a side of the color film substrate which is away from the array substrate, and the second electrical connector is provided on a first side surface of a side of the color film substrate which is adjacent to an electrostatic discharge portion of the array substrate.