Capacitive Touch Panel Mask Layer Reduces Metal Jumper Visibility
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Solution Overview
Problem
Capacitive touch panels suffer from visible metal jumpers due to high reflectance, which affects their appearance and optical performance, and existing methods to reduce their visibility are difficult to implement without reducing production yield or increasing costs.
Innovation Solution
A capacitive touch panel design that incorporates a mask layer with lower reflectance than the metal jumpers, made of non-conductive materials like black or grey photoresistive materials, between the metal jumpers and the transparent substrate to reduce light reflection and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal jumpers are used for connecting electrodes, then electrical conductivity and low cost are improved, but visibility and appearance quality deteriorate due to high reflectance
Solution Approach 1:
An insulating sheet made of transparent or translucent material is introduced as an intermediary layer between the metal jumper and the transparent substrate. This mediator allows light to pass through while preventing direct reflection from the metal jumper surface, thereby reducing visibility while maintaining electrical connectivity.
Solution Approach 2:
A thin film insulating sheet is used to cover the metal jumper. The thin film structure is sufficient to reduce light reflection and improve appearance quality, while being thin enough to maintain the overall transparency and optical performance of the touch panel.
2Ease of manufacture
If metal jumpers are used, then manufacturing cost is reduced, but optical performance deteriorates due to light reflection
Solution Approach 1:
The insulating sheet acts as a mediator that preserves the cost advantage of metal jumpers while improving optical performance. The transparent or translucent material allows light transmission and reduces reflection, enhancing optical characteristics without requiring expensive alternative materials.
Solution Approach 2:
The thin film insulating sheet provides an effective solution to optical performance issues while adding minimal manufacturing complexity. The thin film structure is easy to integrate into existing production processes and maintains cost-effectiveness.
3Object-affected harmful factors
If the width of metal jumpers is reduced to improve appearance, then visibility is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The insulating sheet provides a universal solution that works with metal jumpers of various widths. Rather than requiring precise control of jumper width, the insulating sheet consistently reduces visibility across different dimensions, simplifying manufacturing tolerances and processes.
Solution Approach 2:
The thin film insulating sheet can be applied uniformly across different jumper widths without requiring complex customization. This approach maintains manufacturing simplicity while effectively addressing visibility concerns across various design configurations.
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 effectively reduces the visibility of metal jumpers, enhancing the optical characteristics and visual appeal of capacitive touch panels while maintaining high production yield and low costs.
Implementation Method 1
A mask layer, reflectance of which is lower than that of the metal jumper, is set between the metal jumper and the transparent substrate to block the light reflected by the metal jumper
Data Source
AI summary
The present invention relates to a touch technology and provides a capacitive touch panel which has low-visibility metal jumper. The touch panel comprises of a transparent substrate and at least one metal juniper. A mask layer, reflectance of which is lower than that of the metal jumper, is set between the metal jumper and the transparent substrate to block the light reflected by the metal jumper. The mask layer can reduce light reflection of the metal jumper so as to reduce visibility of the metal jumper.