Flexible Touch Screen Panel Opaque Metal Sensing Electrodes
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Solution Overview
Problem
Conventional touch screen panels using transparent conductive materials like ITO are prone to cracking when bent or folded, leading to operation failures and visibility issues due to metal reflection, which limits their flexibility and application in flexible display devices.
Innovation Solution
A flexible touch screen panel with sensing electrodes made of opaque low-resistance metals like Ag, Al, Cu, or Ni, or nano-metal conductive layers, integrated with a polarizing plate and a flexible substrate, forming a mesh shape to reduce visibility and enhance flexibility, and a flexible display device with these features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent conductive materials like ITO are used for sensing electrodes, then visibility is improved, but cracking occurs when bent or folded leading to operation failures
Solution Approach 1:
The patent changes the material parameter from transparent conductive material (ITO) to opaque conductive material (metal), fundamentally altering the optical properties while improving mechanical flexibility and crack resistance
Solution Approach 2:
The patent introduces a polarizing plate to control the optical appearance of the opaque metal sensing electrodes, making them invisible or less visible when viewed from certain angles, thus resolving the visibility issue while maintaining the mechanical benefits of metal
2Reliability
If opaque conductive metal is used for sensing electrodes, then flexibility and crack resistance are improved, but visibility and surface reflectivity worsen
Solution Approach 1:
The patent introduces a polarizing plate as an intermediary component between the opaque metal sensing electrodes and the viewer, which controls the reflection and visibility of the metal electrodes without affecting their electrical or mechanical properties
Solution Approach 2:
The polarizing plate modifies the optical appearance of the opaque metal by controlling polarization, making the electrodes invisible or less visible from certain viewing angles while maintaining their flexibility and crack 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
The solution decreases the occurrence of cracks and reduces visibility of sensing electrodes, ensuring high flexibility and operational reliability in flexible display devices, while maintaining low resistance and reducing surface reflectivity.
Implementation Method 1
a polarizing plate on the substrate having the sensing electrodes formed thereon
Data Source
AI summary
A flexible touch screen panel includes a substrate having flexibility, sensing electrodes on at least one surface of the substrate, and implemented using an opaque conductive metal, and a polarizing plate on the substrate having the sensing electrodes formed thereon. The sensing electrodes may be implemented in a mesh shape having a plurality of openings.