Touch Substrate With Alternating Refractive Index Films
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Solution Overview
Problem
Existing touch display products often have limited functionality, lacking both effective touch interaction and mirror reflection capabilities, which restricts their user experience and interaction capacity.
Innovation Solution
A touch substrate is developed with a base plate and touch electrodes, featuring a three-layer film system with high and low refractive index materials (e.g., titanium dioxide, niobium oxide, and silicon dioxide) stacked alternately to enhance mirror reflectivity, and touch electrodes configured to form metal grids for improved interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer film structure is used in the touch substrate, then the manufacturing process is simple, but the mirror reflection effect is insufficient
Solution Approach 1:
The single film layer is segmented into multiple alternating high-refractive-index and low-refractive-index film layers. This segmentation creates multiple interfaces for light reflection, significantly enhancing the mirror reflection effect while maintaining a relatively simple manufacturing process through sequential deposition techniques.
Solution Approach 2:
The patent uses composite film structures combining materials with different refractive indices (high refractive index materials like TiO2, Nb2O5 alternated with low refractive index materials like SiO2, MgF2). This composite approach optimizes optical performance by creating constructive interference for reflected light while managing the manufacturing complexity through established thin-film deposition processes.
2Adaptability or versatility
If touch electrodes are added to the touch substrate, then touch interaction capability is improved, but the mirror reflection effect deteriorates due to electrode obstruction
Solution Approach 1:
The patent transitions from planar touch electrodes to three-dimensional transparent conductive oxide (TCO) columnar structures. This dimensional change allows light to pass through the gaps between columns, reducing obstruction to the mirror reflection effect while maintaining touch sensitivity through the conductive properties of the TCO material.
Solution Approach 2:
The patent employs thin-film transparent conductive oxide layers that form columnar structures. These thin films maintain electrical conductivity for touch interaction while their transparent nature and columnar morphology minimize light blocking, allowing the underlying mirror structure to function effectively.
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 provides a touch substrate with enhanced mirror reflection and touch functions, integrated into a display panel, addressing the limitations of single-function displays and improving user interaction and experience.
Implementation Method 1
a first film layer, a second film layer and a third film layer are sequentially stacked on one side of the base plate, and the refractive index of the second film layer is smaller than that of the first film layer and the third film layer
Implementation Method 2
the refractive index of the second film layer is smaller than that of the first film layer and the third film layer
Data Source
AI summary
A manufacturing method of a touch substrate, a touch substrate, and a touch displaying device. The touch substrate comprises a base plate and touch electrodes, wherein a first film layer, a second film layer and a third film layer are sequentially stacked on one side of the base plate, and the refractive index of the second film layer is smaller than that of the first film layer and the third film layer.