Static Electricity Dispersion Pattern for OLED ESD Protection
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Solution Overview
Problem
Organic electroluminescent display devices are susceptible to damage from electrostatic discharge (ESD) due to static electricity flowing through sheet unit wiring lines, especially when a one-step cutting process is used to separate adjacent devices on a mother substrate, leading to increased risk of damage during the manufacturing process.
Innovation Solution
Incorporating a static electricity dispersion pattern in the non-display area of the organic light-emitting display device, which is separated from the sidewall of the substrate and formed as part of the same layer as dummy wires, helps to dissipate static electricity by intersecting with conductive and semiconductor patterns, reducing the risk of ESD damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a one-step cutting process is used to cut the mother substrate once between adjacent display devices, then productivity is improved, but the number of sheet unit wiring lines remaining increases, making devices more susceptible to electrostatic discharge damage
Solution Approach 1:
A guard ring structure is introduced as an intermediary element between the sheet unit wiring lines and the display devices. This guard ring acts as a mediator that intercepts and redirects electrostatic discharge away from the vulnerable internal elements of the display devices, thereby protecting them while maintaining the one-step cutting process
Solution Approach 2:
The invention converts the potentially harmful electrostatic discharge into a controlled path by designing the guard ring to attract and channel the static electricity along its perimeter. The harmful ESD is redirected to flow through the guard ring structure rather than damaging the display device internals, effectively transforming the harm into a controlled protective mechanism
2Productivity
If sheet unit wiring lines are used for testing panels in units of sheets, then test efficiency is improved, but static electricity can flow through these wiring lines and damage internal elements
Solution Approach 1:
The guard ring serves as a protective intermediary that stands between the sheet unit wiring lines and the display device internal elements. It intercepts electrostatic discharge from the wiring lines and redirects it along the guard ring perimeter, preventing the harmful static electricity from reaching and damaging the vulnerable internal components
Solution Approach 2:
The guard ring is positioned and configured in advance to provide protective cushioning against potential electrostatic discharge. By pre-establishing this protective barrier around the perimeter of the non-display area, the system is prepared to absorb and redirect ESD before it can reach the display device internals
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 solution effectively reduces the impact of electrostatic discharge on the organic electroluminescent display devices by dispersing static electricity away from the display area, minimizing damage and ensuring the integrity of the devices even when using a one-step cutting process.
Implementation Method 1
Static electricity may flow into the organic electroluminescent display devices through the sheet unit wiring lines, thereby damaging internal elements of the organic electroluminescent display devices
Data Source
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AI summary
Organic light-emitting display devices (100) are provided. One organic light-emitting display device (100) includes a substrate (110), a first wire (122) on the substrate, a second wire (124) insulated from and crossing the first wire (122), and a static electricity dispersion pattern (126) insulated from and crossing the second wire(124). Another organic light-emitting display device (100) includes: a substrate (100); a gate line (121_1) and a data line (121_2)on the substrate (110), insulated from and crossing each other; a dummy wire (122, AW) that is part of a same layer as one of the gate line (121_1) or the data line (121_2), and having at least one end aligned with a sidewall (110S) of the substrate (110; a dummy intersection wire (124) insulated from and crossing the dummy wire(122, AW); and a static electricity dispersion pattern (126) insulated from and crossing the dummy intersection wire (124).