Display Panel Grounding Structure for Static Charge Dissipation
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Solution Overview
Problem
Static electricity accumulation can damage display panels by breaking down the inorganic insulation layer on reflective metal layers, leading to display failure, especially in regions with R corners and notches where the frit is shrunk, causing electrical discharge to the ground signal line and overlapping test circuits.
Innovation Solution
Incorporating an electrostatic consumption resistance portion between the reflective metal layer and the ground metal line, which can be achieved through a high-resistance disconnection portion or additional electrostatic consumption resistance layers, to dissipate static electricity before it reaches the ground metal line, thereby protecting the display panel from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the frit is shrunk inside the frit metal in the R corner region to provide space for cut-out clearance, then the space requirement is satisfied, but the inorganic insulation layer may be broken down by static electricity
Solution Approach 1:
An electrostatic consumption resistance portion is introduced as an intermediary element between the reflective metal layer and the ground signal line. This resistance portion acts as a mediator that consumes static electricity through resistive dissipation, preventing the static charge from breaking down the inorganic insulation layer while allowing the frit to be shrunk for clearance space.
Solution Approach 2:
The electrical resistance parameter is changed by introducing a high-resistance electrostatic consumption resistance portion. This parameter change allows the system to dissipate static electricity gradually through resistance rather than allowing direct discharge, thereby protecting the insulation layer while maintaining the shrunk frit configuration for clearance.
2Reliability
If the reflective metal layer is connected directly to the ground signal line to conduct static electricity, then static electricity discharge path is provided, but the test circuit region and shift register circuit may be damaged
Solution Approach 1:
The electrostatic consumption resistance portion serves as an intermediary between the reflective metal layer and the ground signal line. It provides a controlled discharge path for static electricity while limiting the current through its high resistance, thus protecting sensitive circuits like test circuits and shift registers from damage.
Solution Approach 2:
The high-resistance electrostatic consumption resistance portion is placed in advance between the reflective metal layer and ground to cushion or absorb the static electricity discharge. This prior cushioning prevents the full force of static discharge from reaching and damaging sensitive circuits.
3Reliability
If an electrostatic consumption resistance portion is added between the reflective metal layer and ground metal line, then static electricity protection is improved, but the device complexity increases
Solution Approach 1:
The electrostatic consumption resistance portion is merged with the existing ground signal line structure. The resistance is formed as part of the ground metal line or encapsulation layer, combining the electrostatic protection function with the existing grounding infrastructure rather than adding a completely separate component.
Solution Approach 2:
The electrostatic consumption resistance portion serves multiple functions: it provides static electricity dissipation, maintains the ground potential, and protects both the insulation layer and sensitive circuits. This multi-functionality reduces the need for additional separate protection components, thereby limiting complexity increase.
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 electrostatic consumption resistance portion effectively reduces the impact of static electricity, preventing damage to the display panel by re-discharging static electricity and maintaining the integrity of the ground metal line and test circuits, thus enhancing the panel's anti-static properties.
Implementation Method 1
the electrostatic consumption resistance portion includes a first electrostatic consumption resistance portion located at the gate metal layer
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel includes a display region and a non-display region surrounding the display region. The non-display region includes a step region, a left border and a right border that are adjacent to the step region, and an upper border arranged opposite to the step region. The left border, the right border, the upper border, and the step region surround the display region. The left border and the right border each include an encapsulation region. The encapsulation region includes a sealant and a reflective metal layer that are at least partially overlapped with each other. The step region includes a ground metal line, and the ground metal line is connected to the reflective metal layer through an electrostatic consumption resistance portion. The electrostatic consumption resistance portion includes a first electrostatic consumption resistance portion located at a gate metal layer.