Touch Panel Conductive Film With Hydrophobic Patterning for High Transmittance
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Solution Overview
Problem
Current touch panel conductive films, such as those made of indium tin oxide (ITO) or conductive polymers, suffer from low light transmittance due to material absorption, and existing patterning methods are complex and costly, making it difficult to achieve high light transmittance while maintaining conductivity.
Innovation Solution
A conductive film with hydrophobic units disposed at intervals, formed using a patterned conductive film and hydrophobic materials like anti-fingerprint coatings, which allows for better light transmittance and simplified manufacturing by preventing water-soluble conductive materials from covering the hydrophobic units, thereby increasing light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive film made of ITO or conductive polymer is used, then conductivity is achieved, but light transmittance is reduced due to material absorption
Solution Approach 1:
The conductive film is segmented into isolated conductive particles or clusters rather than a continuous film. This segmentation reduces the total amount of conductive material present, thereby decreasing light absorption while maintaining conductivity through percolation pathways between particles.
Solution Approach 2:
The conductive material is distributed non-uniformly with higher concentration in specific regions to maintain conductivity while having lower overall concentration. The hydrophobic units are strategically positioned to create local variations in material distribution that optimize both conductivity and light transmittance.
2Illumination intensity
If a common patterning process is used to hollow out the conductive film, then light transmittance is increased, but manufacturing complexity and cost increase
Solution Approach 1:
Hydrophobic units are pre-formed on the substrate before the conductive material is applied. This preliminary action creates a template that automatically defines where conductive material will and will not adhere, eliminating the need for subsequent patterning steps to create transparent regions.
Solution Approach 2:
The hydrophobic units serve as an intermediary element between the substrate and the conductive material. They mediate the deposition process by preventing conductive material from adhering to their surfaces, thereby automatically creating the desired patterned structure with transparent regions.
3Adaptability or versatility
If conductive polymer is used instead of ITO, then flexibility is improved, but light transmittance is dramatically reduced due to stronger absorption
Solution Approach 1:
The conductive polymer is segmented into discrete particles or clusters rather than forming a continuous film. This segmentation dramatically reduces the total polymer content while maintaining conductivity through particle-to-particle contact, thereby significantly improving light transmittance while preserving the inherent flexibility of conductive polymer 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
The conductive film achieves high light transmittance and improved conductivity, reducing manufacturing costs and complexity compared to traditional methods, while maintaining effective touch sensing capabilities.
Implementation Method 1
a plurality of hydrophobic units 23 are disposed in the film 24 with intervals
Data Source
AI summary
The present disclosure provides a conductive film of a touch panel. The conductive film has a film and a plurality of a plurality of hydrophobic units. The film is used for sensing touch signals, and the hydrophobic units are disposed in the film with intervals. Conductive material of the conductive film of the touch panel is distributed outside the region of the hydrophobic units, and as the hydrophobic units have good light transmittance, the touch panel of the present disclosure has a characteristic of high light transmittance.