Touch-Sensing Panel with Dual Mesh Patterns for Low Visibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch-sensing panels face challenges in reducing the visibility of touch electrodes while maintaining high bonding yield and signal transmission, as blackened metal increases impedance and can lead to decreased production yield and signal transmission issues.
Innovation Solution
A touch-sensing panel design featuring a substrate with alternating mesh patterns, where one mesh pattern has a low-reflectivity layer between the metal layer and the substrate, and the other has a metal layer with reduced width, minimizing visibility and impedance by strategically placing low-reflectivity layers to reduce light reflection and maintain signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If blackened metal is used for the touch electrode layer to reduce visibility, then the visibility of touch electrodes is reduced, but the impedance of the bonding pad increases and production yield decreases
Solution Approach 1:
The patent applies different surface treatments to different regions of the touch electrode layer. The touch sensing area uses blackened metal for low visibility, while the bonding pad area maintains a non-blackened, highly reflective surface to ensure low impedance and high bonding yield. This local differentiation resolves the contradiction by optimizing each region for its specific function.
Solution Approach 2:
The touch electrode layer is segmented into distinct functional zones: a touch sensing area with blackened metal surfaces for aesthetic purposes and a bonding pad area with non-blackened surfaces for electrical connectivity. This segmentation allows each zone to be optimized independently, with the bonding pad area maintaining high reflectivity to prevent impedance increase.
2Illumination intensity
If blackened metal is used for the touch electrode layer to reduce visibility, then the visibility of touch electrodes is reduced, but signal transmission quality deteriorates
Solution Approach 1:
The patent applies different surface treatments to different regions of the touch electrode layer. The touch sensing area uses blackened metal for low visibility, while the bonding pad area maintains a non-blackened, highly reflective surface to ensure low impedance and high bonding yield. This local differentiation resolves the contradiction by optimizing each region for its specific function.
Solution Approach 2:
The patent introduces an intermediary insulating layer between the touch electrode layer and the substrate. This insulating layer serves as a mediator that allows the bonding pad to maintain its non-blackened, highly reflective surface while still being part of the overall touch electrode structure, thus preserving signal transmission quality without compromising the aesthetic appearance.
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 design achieves low visibility of mesh patterns and high bonding yield, ensuring effective signal transmission between the touch-sensing panel and the circuit board, while preventing signal transmission issues due to high resistance from low-reflectivity layers.
Implementation Method 1
a reflectivity of a surface of one of the first mesh pattern and the second mesh pattern is smaller than a reflectivity of a surface of the other of the first mesh pattern and the second mesh pattern
Data Source
AI summary
The disclosure provides a touch-sensing panel, which includes a substrate, a first mesh pattern, an insulating layer, and a second mesh pattern. The substrate has an active area and a peripheral area. The first mesh pattern is located in the active area. The insulating layer is disposed on the first mesh pattern. The second mesh pattern is located in the active area. At least a part of the second mesh pattern is disposed on the insulating layer. Each of the first mesh pattern and the second mesh pattern includes a plurality of mesh lines. A reflectivity of a surface of one of the first mesh pattern and the second pattern is smaller than a reflectivity of a surface of the other of the first mesh pattern and the second mesh pattern, and a width of each of the mesh lines of the one of the first mesh pattern and the second mesh pattern is smaller than a width of each of the mesh lines of the other of the first mesh pattern and the second mesh pattern.