Touch Screen Panel Asymmetric Connection Widths for Static Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch screen panels, particularly capacitive types, are prone to defects due to disconnection issues caused by static electricity, which increases the number of defects and sensitivity differences between sensing electrodes.
Innovation Solution
A touch screen panel design featuring a base substrate with first and second touch electrodes, where the second sensing connection portion has a width equal to or greater than one and a half times the first, and an insulation layer between them, reducing the risk of static-induced disconnection and improving sensitivity uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the connecting portion is reduced to be less than the width of the sensing electrode, then the resistance of the connecting portion increases, but this makes the connecting portion more susceptible to disconnection due to static electricity
Solution Approach 1:
The patent applies different width specifications to different connecting portions based on their functional requirements. The first sensing connection portion maintains a narrower width (less than the sensing electrode width) to preserve sensitivity, while the second sensing connection portion uses a wider width (equal to or greater than one and a half times the first width) to enhance static electricity resistance. This local differentiation resolves the contradiction by optimizing each region's dimensions for its specific purpose.
Solution Approach 2:
The touch electrode is divided into multiple sensing connection portions with different width characteristics. By segmenting the connecting structure into at least two distinct parts with different width specifications, the patent allows each segment to fulfill different functional requirements - one optimized for sensitivity and another for durability against static electricity.
2Reliability
If the width of the connecting portion is increased to reduce resistance, then the sensitivity uniformity across different sensing electrodes may deteriorate
Solution Approach 1:
Different connecting portions are assigned different width specifications according to their specific functional needs. The first sensing connection portion uses a narrower width to maintain sensitivity uniformity across sensing electrodes, while the second sensing connection portion uses a wider width to ensure connection reliability. This localized optimization prevents the sensitivity uniformity issue that would arise from uniformly increasing all connecting portion widths.
Solution Approach 2:
The patent introduces asymmetric width design where the second sensing connection portion has a width (equal to or greater than one and a half times the first width) that is intentionally different from and larger than the first sensing connection portion. This asymmetric configuration allows the system to achieve both sensitivity uniformity and connection reliability simultaneously by having non-uniform connecting portion dimensions.
Data Source
AI summary
A touch screen panel including a base substrate, a first touch electrode disposed on the base substrate and including a first sensing electrode disposed along a first direction and a first sensing connection portion connected to the first sensing electrode and having a first width, an insulation layer disposed on the first touch electrode, and a second touch electrode disposed on the insulation layer and including a second sensing electrode disposed along a second direction crossing the first direction and a second sensing connection portion connected to the second sensing electrode and having a second width. The second width is equal to or greater than one and a half times the first width.