Transparent Conductive Extensions for Capacitive Touch Screen Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrostatic capacitive touch screen panels face issues with visibility of metal jumping bridges and routing wires at the interface between the electrode and routing wire forming parts, leading to potential damage from static electricity due to high resistance and small contact holes.
Innovation Solution
The use of transparent conductive extensions connecting electrode patterns to routing wires, eliminating the need for metal jumping bridges and reducing the visibility of routing wires by maintaining a minimum spacing of 1.5 μm, thereby minimizing damage from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal jumping bridges and routing wires are used to connect electrodes, then electrical connection is achieved, but visibility of the interface occurs and resistance increases
Solution Approach 1:
The patent introduces a transparent conductive extension as an intermediary component between the electrode pattern and the metal routing wire. This extension serves as a mediator that provides electrical connection while being optically transparent, thus eliminating the visibility problem of metal components at the interface region.
Solution Approach 2:
The patent applies the principle of optical property modification by using a transparent conductive material for the extension instead of opaque metal. This material allows light to pass through, making the connection structure invisible or significantly less visible, thereby solving the aesthetic and display quality issues.
2Manufacturing precision
If contact holes are made small to improve touch accuracy, then manufacturing precision improves, but resistance increases and damage from static electricity occurs
Solution Approach 1:
The patent divides the electrical connection path into multiple segments: the electrode pattern, the transparent conductive extension, and the metal routing wire. This segmentation allows the contact hole to remain small for precision while the extended transparent conductive path provides additional conduction area, compensating for the high resistance at the small contact interface.
Solution Approach 2:
The patent uses a composite connection structure combining transparent conductive material and metal material. The transparent conductive extension with higher conductivity compensates for the resistance introduced by small contact holes, while the metal routing wire provides low-resistance bulk connection.
3Object-generated harmful factors
If transparent conductive extensions are used instead of metal jumping bridges, then visibility is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the function of electrical connection and optical transparency into a single transparent conductive extension component. This integration eliminates the need for separate transparent and metal connection components, simplifying the manufacturing process despite the introduction of new materials.
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
Prevents the visibility of routing wires and reduces the risk of damage from static electricity, enhancing the reliability and accuracy of touch screen panels by using transparent conductive extensions to connect electrode patterns directly to routing wires.
Implementation Method 1
The use of transparent conductive extensions connecting electrode patterns to routing wires
Implementation Method 2
a plurality of insulation patterns formed between the first electrode serials and the second electrode serials so that the first electrode serials are insulated from the second electrode serials
Data Source
AI summary
A touch screen panel according to an embodiment includes an electrode forming part including a plurality of first electrode serials arranged in parallel on a substrate in a first direction and a plurality of second electrode serials arranged on the substrate to cross over the first electrode serials; and a routing wire forming part formed on the substrate, and including a plurality of first routing wires respectively connected to the plurality of first electrode serials and a plurality of second routing wires respectively connected to the plurality of second electrode serials.