Touch Panel Intermediate Layer Strength
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Solution Overview
Problem
Resistive touch panels experience performance degradation and scratching with repeated use, leading to a need for a touch panel with improved strength and reliability, particularly in the formation of electrodes without compromising the cover substrate's integrity.
Innovation Solution
A touch panel design featuring a cover substrate with an intermediate layer made of a resin composition, which supports the sensing and wire electrodes, preventing strength degradation during electrode formation and enhancing the panel's reliability by maintaining transmittance and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode is disposed on the cover substrate, then the capacitive touch function is achieved, but the strength of the cover substrate is lowered
Solution Approach 1:
An intermediate layer is introduced between the cover substrate and the electrode to act as a mediator. This intermediate layer has higher strength than the cover substrate, allowing the electrode to be formed on it without compromising the cover substrate's integrity. The intermediate layer absorbs the mechanical stress and damage from the electrode formation process, preserving the cover substrate strength while enabling capacitive touch functionality.
Solution Approach 2:
The touch panel structure is segmented into distinct functional layers: the cover substrate for protection, the intermediate layer for structural support and electrode mounting, and the electrode layer for sensing. This segmentation allows each layer to be optimized for its specific function, with the intermediate layer bearing the mechanical load of electrode formation while the cover substrate maintains its protective strength.
2Adaptability or versatility
If the electrode is formed on the cover substrate, then the capacitive sensing capability is provided, but the overall strength of the touch window is lowered
Solution Approach 1:
The intermediate layer serves as a mediator that enables capacitive touch functionality without weakening the touch window. It provides a suitable substrate for electrode formation with appropriate mechanical properties, isolating the electrode formation process from the cover substrate and preventing strength degradation of the overall touch window structure.
3Strength
If a resin composition layer is added to support the electrode, then the strength is maintained, but the structure becomes more complex
Solution Approach 1:
The intermediate layer is designed to perform multiple functions simultaneously: it provides mechanical strength to support the electrode formation process, serves as a mounting substrate for the electrode, and maintains the overall structural integrity of the touch panel. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in structural complexity despite the added layer.
Data Source
AI summary
A touch panel according to the embodiment includes: a cover substrate including an active area and an unactive area; an intermediate layer on the cover substrate; and an electrode on the intermediate layer, wherein the intermediate layer includes an acrylic resin composition.