Electroluminescent Display Conductive Pattern Insulation
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Solution Overview
Problem
Electrical shorts between signal lines in top-emission type electroluminescent display devices can cause ignition and driving failures, compromising safety due to particle generation during the seal pattern attachment process.
Innovation Solution
The electroluminescent display device incorporates a substrate with defined display and non-display areas, featuring a thin film transistor, light-emitting diode, first and second link lines, and a conductive pattern in the non-display area. The conductive pattern has an opening corresponding to the link lines, preventing electrical shorts by maintaining a distance and reducing moisture permeability through the use of a seal pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal pattern is used to attach the cover substrate, then the device can be sealed and protected, but particles are generated that cause electrical shorts between signal lines
Solution Approach 1:
An insulating pattern is introduced as an intermediary layer between the conductive pattern and the link lines. This insulating pattern acts as a mediator that prevents direct contact between conductive elements, thereby eliminating the electrical short problem while maintaining the sealing protection function of the cover substrate attachment
2Area of stationary object
If the emission area is increased in top-emission type devices, then more light can be emitted, but the risk of electrical shorts increases due to particle generation during seal attachment
Solution Approach 1:
The insulating pattern serves as a protective intermediary that enables larger emission areas to be implemented without increasing the risk of electrical shorts. By providing continuous insulation between conductive elements and link lines, it allows the device to expand its functional area while maintaining electrical safety
3Device complexity
If conductive patterns are disposed close to link lines to improve device layout, then space is optimized, but electrical shorts may occur due to particle generation during sealing
Solution Approach 1:
The insulating pattern is positioned between the conductive pattern and the link lines to act as a protective intermediary. This allows the conductive patterns to be disposed close to link lines for optimized layout while the insulating pattern prevents electrical shorts by maintaining electrical isolation even when particles are present during seal attachment
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
This configuration effectively prevents electrical shorts, reduces the risk of ignition, and enhances safety by ensuring reliable operation and improved safety standards in electroluminescent display devices.
Implementation Method 1
electroluminescent display devices emit light due to the radiative recombination of an exciton after forming the exciton from an electron and a hole by injecting charges into a light-emitting layer
Data Source
AI summary
An electroluminescent display device includes a substrate on which a display area and a non-display area are defined. A thin film transistor is in the display area on the substrate. A light-emitting diode is connected to the thin film transistor and includes a first electrode, a light-emitting layer and a second electrode. A first link line is disposed in the non-display area and applies a first voltage to the first electrode. A second link line is spaced apart from the first link line in the non-display area. A conductive pattern is disposed in the non-display area and is connected to the second electrode to apply a second voltage. The conductive pattern has an opening corresponding to the first and second link lines.