Film Sensor Antistatic Layer and Transparent Film Interlayer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Film sensors with capacitive sensors on polarizing films are prone to malfunctioning due to static electricity, leading to display defects and reduced visibility.
Innovation Solution
A film sensor configuration with a polarizing film, an antistatic layer, and a capacitive sensor laminated in order, where the antistatic layer has a surface resistance value of 1.0×10^9 to 1.0×10^11 Ω/□, and a transparent film is interposed between the antistatic layer and the transparent electrode pattern, preventing static charging and component diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarizing film is used in a film sensor, then visibility is improved, but static electricity charging occurs causing malfunctioning
Solution Approach 1:
A transparent film is introduced as an intermediary layer between the antistatic layer and the transparent electrode pattern. This intermediate transparent film prevents direct contact between the antistatic layer components and the adhesive layer, thereby preventing component diffusion while maintaining the antistatic function. The transparent film acts as a mediator that resolves the contradiction between achieving antistatic properties and preventing sensor malfunctioning.
Solution Approach 2:
The surface resistance value of the antistatic layer is precisely controlled within the range of 1.0×10^9 to 1.0×10^11 Ω/□. By optimizing this electrical parameter, the patent achieves effective static electricity suppression while preventing excessive conductivity that could cause malfunctioning. This parameter optimization resolves the contradiction between antistatic effectiveness and reliable operation.
2Reliability
If an antistatic layer is added to prevent static electricity, then reliability is improved, but component diffusion may occur causing long-term defects
Solution Approach 1:
The transparent film serves as a protective intermediary barrier between the antistatic layer and the adhesive layer. This intermediate layer prevents the diffusion of antistatic layer components into the adhesive layer over time, thereby maintaining the antistatic function throughout the long-term operational life of the sensor without degradation.
Solution Approach 2:
The transparent film is positioned in advance between the antistatic layer and the adhesive layer to prevent future component diffusion. This preliminary protective measure ensures that the antistatic layer components cannot migrate into the adhesive layer during long-term operation, thereby preventing display defects before they occur.
3Ease of manufacture
If the antistatic layer contacts the adhesive layer, then manufacturing is simplified, but component diffusion occurs reducing durability
Solution Approach 1:
The transparent film acts as an intermediary barrier layer between the antistatic layer and the adhesive layer. While this adds one more layer to the structure, it prevents component diffusion and maintains material composition stability. The transparent film can be integrated into the existing laminating process, minimizing manufacturing complexity while ensuring long-term compositional stability.
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 configuration effectively suppresses static electricity charging, maintains accurate capacitance sensing, and prevents long-term malfunctioning and display defects, ensuring improved visibility and prolonged proper operation.
Implementation Method 1
the antistatic layer having a surface resistance value of 1.0×10^9 to 1.0×10^11Ω/□... By making the surface resistance value of the antistatic layer to be within the aforementioned range, the charging of the polarizing film due to static electricity or the like can be suppressed
Data Source
AI summary
A film sensor includes a polarizing film, an antistatic layer and a capacitive sensor that are laminated in this order, the capacitive sensor having a transparent film, a transparent electrode pattern formed on one side of the transparent film, and an adhesive layer formed on the one side of the transparent film to embed the transparent electrode pattern. The transparent film is disposed between the antistatic layer and the transparent electrode pattern. The antistatic layer has a surface resistance value of 1.0×109 to 1.0×1011Ω/□.