Electrostatic Discharge Device for OLED Substrate Protection
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Solution Overview
Problem
Static electricity generated during the manufacturing process of organic electro-luminescence display devices can cause electrical defects such as disconnection and short circuits in the substrate lines, leading to damage and image quality issues.
Innovation Solution
An electrostatic discharge device is integrated into the organic electro-luminescence display device, comprising a metal pattern with an island shape on a substrate, an insulating layer, a semiconductor pattern corresponding to the metal pattern, and overlapping first and second electrodes that allow for effective discharge of static electricity through a semiconductor channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the substrate is fixed to a robot arm and transferred to processing units during manufacturing, then production efficiency is improved, but static electricity is generated causing electrical defects
Solution Approach 1:
An electrostatic discharge device is formed on the substrate before the manufacturing process begins. This preliminary protective structure is in advance ready to discharge static electricity when generated during robot arm transfer and processing, preventing electrical defects without interrupting the manufacturing workflow.
Solution Approach 2:
The electrostatic discharge device converts the harmful static electricity generated during manufacturing into a beneficial controlled discharge. When static electricity accumulates on the substrate during transfer operations, the discharge device provides a safe path for the electricity to dissipate, transforming a potential defect source into a protected state.
2Reliability
If electrostatic discharge devices are added to protect against static electricity, then reliability is improved, but device complexity increases
Solution Approach 1:
The electrostatic discharge device merges multiple functions into a single integrated structure. The first and second electrodes, semiconductor pattern, and insulating layer work together as one unified component that provides electrostatic discharge capability without requiring separate protective devices or complex additional structures.
Solution Approach 2:
The electrostatic discharge device serves multiple purposes: it protects against static electricity damage, maintains substrate electrical stability during manufacturing, and can be integrated into existing substrate designs without interfering with other functional elements. This multi-functionality justifies the added structure by providing comprehensive protection.
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 discharge device effectively prevents defects and image quality deterioration by safely discharging static electricity, reducing the risk of current leakage and signal distortion, and optimizing power consumption.
Implementation Method 1
an electrostatic discharge device, comprising a metal pattern with an island shape on a substrate, an insulating layer, a semiconductor pattern corresponding to the metal pattern, and overlapping first and second electrodes that allow for effective discharge of static electricity through a semiconductor channel
Data Source
AI summary
An electrostatic discharge device and an organic electro-luminescence display device having the same are provided. The organic electro-luminescence display device includes an electrostatic discharge device including a metal pattern having an island shape on a substrate, an insulating layer on the metal pattern, a semiconductor pattern on the insulating layer, the semiconductor pattern corresponding to the metal pattern, a first electrode overlapping one end of the semiconductor pattern, and a second electrode overlapping the other end of the semiconductor pattern, and spaced from the first electrode, thereby preventing a current leakage, a signal distortion and a signal cross-talk to improve the reliability.