Ag Routing Electrode Layout to Prevent Tiled Display Open Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In tiling type display devices, the migration of Ag routing electrodes due to potential differences leads to electrical open defects between pad electrodes and routing electrodes, preventing normal signal transmission.
Innovation Solution
A display device with a boost circuit that outputs a higher potential voltage than the driving signals and a conductive pattern surrounding the routing electrodes to prevent ionization migration, ensuring the routing electrodes remain fixed and functional.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If Ag paste is used as routing electrode along the side portion of the substrate, then the bezel width can be reduced and connection between display panels can be achieved, but ionization migration occurs due to potential difference causing electrical open defects
Solution Approach 1:
A conductive pattern is introduced as an intermediary element between the Ag routing electrode and the pad electrode. This conductive pattern serves as a mediator that receives the driving signal from the Ag electrode and transmits it to the pad electrode, thereby isolating the Ag electrode from direct contact with the pad electrode and preventing ionization migration while maintaining electrical connection reliability
Solution Approach 2:
The conductive pattern is designed to automatically prevent ionization migration by its inherent electrical properties. When the driving signal is applied to the Ag routing electrode, the conductive pattern self-adjusts to distribute the electrical potential, creating a protective effect that prevents Ag ion migration without requiring additional active control mechanisms
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 prevents ionization migration of Ag routing electrodes, maintaining electrical connectivity and minimizing bezel size in tiling type display devices.
Implementation Method 1
a conductive pattern surrounding one or more of the routing electrodes; and a boost circuit that outputs an output voltage obtained by boosting a DC input voltage, the output voltage having a higher potential than that of the driving signals and being output to the conductive pattern
Data Source
AI summary
A display device includes: a plurality of pad electrodes disposed in a non-display area of a substrate of at least one display panel; a plurality of routing electrodes formed along a top surface, a lateral surface and a rear surface of a side portion of the substrate, respectively connected to the plurality of pad electrodes to transmit corresponding driving signals, and containing Ag paste; a conductive pattern surrounding the routing electrode; and a boost circuit that outputs an output voltage obtained by boosting a DC input voltage to the conductive pattern, wherein the output voltage has a higher potential than that of the driving signal.