Conductive Polymer Touch Panel Insulating Regions
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Solution Overview
Problem
Conventional panel-type input devices with conductive polymer coatings face challenges in reducing panel thickness and forming insulating regions at desired positions without increasing manufacturing costs, which can lead to visible boundaries between detecting and inoperative areas, degrading display screen visibility.
Innovation Solution
The use of conducting polymer-based electrode plates with distinct surface resistivity areas, where the inoperative areas have higher resistivity than detecting areas, allowing for the formation of insulating regions using UV light irradiation or conductivity controlling agents, eliminating the need for additional processing steps and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulating regions are formed by additional processing steps or materials, then insulating function is achieved, but panel thickness increases and manufacturing cost increases
Solution Approach 1:
The conductive polymer coating is designed with spatially varying properties: the detecting area maintains low surface resistivity for touch detection, while the inoperative area has high surface resistivity to provide insulating function. This local differentiation eliminates the need for separate insulating structures, reducing panel thickness while maintaining both detection and insulation functions within the same layer.
Solution Approach 2:
The conductive polymer coating serves multiple functions simultaneously: it provides touch detection capability in the detecting area and insulating function in the inoperative area. By integrating both detection and insulation functions into a single multi-functional layer, the patent eliminates the need for additional processing steps or separate insulating materials, thereby reducing panel thickness and simplifying manufacturing.
2Reliability
If conventional insulating regions are formed by additional processing steps or materials, then insulating function is achieved, but manufacturing cost increases
Solution Approach 1:
The conductive polymer coating is designed with spatially varying properties: the detecting area maintains low surface resistivity for touch detection, while the inoperative area has high surface resistivity to provide insulating function. This local differentiation eliminates the need for separate insulating structures, reducing panel thickness while maintaining both detection and insulation functions within the same layer.
Solution Approach 2:
The conductive polymer coating serves multiple functions simultaneously: it provides touch detection capability in the detecting area and insulating function in the inoperative area. By integrating both detection and insulation functions into a single multi-functional layer, the patent eliminates the need for additional processing steps or separate insulating materials, thereby reducing panel thickness and simplifying manufacturing.
3Reliability
If visible boundaries are formed between detecting and inoperative areas, then insulating function is achieved, but display screen visibility degrades
Solution Approach 1:
The conductive polymer coating is designed with spatially varying properties: the detecting area maintains low surface resistivity for touch detection, while the inoperative area has high surface resistivity to provide insulating function. This local differentiation eliminates the need for separate insulating structures, reducing panel thickness while maintaining both detection and insulation functions within the same layer.
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 approach reduces panel thickness, simplifies manufacturing, and improves display screen visibility by eliminating visible boundaries between detecting and inoperative areas, while maintaining low production costs.
Implementation Method 1
the inoperative area having a surface resistivity higher than a surface resistivity of the detecting area
Implementation Method 2
formation of insulating regions using UV light irradiation or conductivity controlling agents
Data Source
AI summary
A panel-type input device including a pair of electrode plates, each electrode plate having a substrate and a conductive coat provided on a surface of the substrate, the conductive coat of each electrode plate being formed from a conducting polymer. The conductive coat of each electrode plate includes a detecting area adapted to detect a touch input and an inoperative area disposed adjacent to the detecting area, the inoperative area having a surface resistivity higher than a surface resistivity of the detecting area. A parallel electrode pair adapted to apply a voltage to the conductive coat is formed in the detecting area, and conductors connected to the parallel electrode pair are formed in the inoperative area. The inoperative area insulates the conductors from the detecting area.