Ion-Trapping Electrode Layout to Prevent Display Circuit Shorting
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Solution Overview
Problem
In display devices, the silver paste used for supplying reference potential can deposit compounds between the ion trapping electrode and the shield layer, leading to short-circuiting and potential impairment of the gate driver circuit and signal-line coupling circuit, especially in severe environments.
Innovation Solution
The display device incorporates a first ion trapping electrode and a second ion trapping electrode, both supplied with constant potential, positioned between the shield layer and the gate driver circuit, with the second electrode bifurcating from the first, preventing ionic impurities from entering the display region and maintaining an appropriate electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silver paste is used to supply reference potential from the array substrate to the counter substrate, then electrical connection is achieved, but compound deposition occurs between the ion trapping electrode and shield layer causing short-circuiting
Solution Approach 1:
The ion trapping electrode is divided into multiple segments (first ion trapping electrode and second ion trapping electrode) separated by the shield layer. This segmentation prevents compound deposition from creating continuous conductive paths, thereby avoiding short-circuiting while maintaining electrical connection stability through the silver paste reference potential supply.
Solution Approach 2:
The shield layer acts as an intermediary between the ion trapping electrode and the gate driver circuit. It blocks the deposition compounds from creating direct conductive paths while allowing the system to maintain reference potential through the silver paste connection, thus mediating between electrical connection requirements and contamination prevention.
2Object-affected harmful factors
If a shield layer is provided to cover the signal-line coupling circuit, then electric field shielding is improved, but the risk of short-circuiting between ion trapping electrode and shield layer increases due to compound deposition
Solution Approach 1:
By segmenting the ion trapping electrode into multiple parts with the shield layer positioned between them, the design achieves electric field shielding while preventing compound deposition from creating continuous conductive paths. The segmentation ensures that even if compounds deposit, they cannot bridge the entire potential difference.
Solution Approach 2:
The shield layer is configured to maintain equipotential conditions in specific regions, reducing electric field interference while the segmented structure prevents short-circuiting. The constant potential supply to ion trapping electrodes works with the shield layer to create controlled potential distributions that shield against interference without creating short-circuit risks.
3Reliability
If ion trapping electrodes are used to keep ionic impurities out of the display region, then display integrity is maintained, but short-circuiting between ion trapping electrode and shield layer can occur in severe environments
Solution Approach 1:
The ion trapping electrode is segmented into multiple parts with the shield layer positioned between them. This segmentation maintains the ion trapping function for display integrity while preventing compound deposition from creating continuous conductive paths that would cause short-circuiting in severe environments.
Solution Approach 2:
The structure combines multiple materials and layers (ion trapping electrode material, shield layer material, and insulating layers) to create a composite system. This composite structure maintains ion trapping effectiveness for display integrity while the material composition and layering prevent short-circuiting through controlled electrical properties and deposition resistance.
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 short-circuiting and maintains the reliability of the display device by keeping ionic impurities out of the display region, ensuring stable operation even in severe environments.
Implementation Method 1
a first ion trapping electrode disposed between the shield layer and the gate driver circuit, provided in a linear shape along the gate driver circuit, and supplied with constant potential
Data Source
AI summary
A display device includes an array substrate, a first region in which a plurality of scan lines extending in a first direction, a plurality of signal lines extending in a second direction, and a plurality of pixels are provided on the array substrate and that has a first side, a second side, a third side, a fourth side, and a plurality of curved line parts, a second region positioned between an end part of the array substrate and the first region, a signal-line coupling circuit disposed in the second region and coupled to the signal lines, a shield layer disposed in the second region and covering at least part of the signal-line coupling circuit near at least one of the curved line parts, and a gate driver circuit disposed in the second region outside the signal-line coupling circuit and coupled to the scan lines.