Display Panel Ground-Line Shielding for Edge Static Discharge
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Solution Overview
Problem
Wires in display devices are vulnerable to damage from static electricity concentrated at the edge of the main region, leading to reduced display quality and lifespan.
Innovation Solution
Incorporation of static electricity shielding portions electrically connected to ground lines, which efficiently discharge static electricity, protecting the wires in the bank area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding layer is disposed as an island-shaped conductive layer adjacent to one edge of the main region, then static electricity can be concentrated at the shielding layer for discharge, but wires extending to the sub-region become vulnerable to damage from concentrated static electricity
Solution Approach 1:
A ground line is introduced as an intermediary element between the shielding layer and the wires. The ground line provides a dedicated low-impedance path for static electricity to discharge to ground, preventing the electricity from damaging the wires. This mediator structure allows the shielding layer to maintain its static electricity concentration function while protecting the wires through the ground connection path.
Solution Approach 2:
The protection mechanism is extended from a two-dimensional island-shaped shielding layer to a three-dimensional structure by adding the ground line connection. The ground line creates a vertical discharge path through the substrate to ground, adding a new dimension to the static electricity management system. This allows static electricity to be discharged through multiple paths: along the wire surface and through the ground line to ground.
2Ease of operation
If wires are arranged along the boundary between the main region and sub-region for circuit connection, then electrical connectivity is achieved, but the wires are exposed to static electricity damage from the edge
Solution Approach 1:
The ground line acts as an intermediary protective element positioned between the vulnerable wires and the static electricity source. It provides a preferential discharge path that intercepts static electricity before it can damage the wires, while allowing the wires to maintain their boundary routing for circuit connection purposes.
Solution Approach 2:
The ground line is pre-configured along the wire path before static electricity discharge occurs. This beforehand preparation creates a protective cushioning effect by establishing a low-impedance discharge path that absorbs and redirects static electricity away from the wires, cushioning them against potential damage.
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
Reduces the likelihood of wire damage from static electricity, thereby improving display quality and lifespan.
Implementation Method 1
a ground line adjacent to one of the sensing transmission lines... a first static electricity shielding portion overlapping the bank and electrically connected to the ground line
Implementation Method 2
efficiently discharge static electricity, protecting the wires in the bank area
Data Source
AI summary
A display device including: a display panel including a main region and a sub-region, wherein the display panel includes a circuit layer, an element layer, an encapsulation layer, and a touch sensor layer, the main region includes a display area and a non-display area, the non-display area includes a dam area in which at least one dam portion surrounding the display area is arranged, a bonding area surrounding the dam area, and a bank area disposed between the side of the main region and the bonding area, and the display panel further includes: sensing transmission lines electrically connected to the touch sensor layer and extending to the sub-region; a ground line adjacent to one of the sensing transmission lines; a bank disposed in the bank area and adjacent to the ground line; and a first static electricity shielding portion overlapping the bank and electrically connected to the ground line.