Hexagonal Mesh Touch Panel Layout for Better Visibility
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Solution Overview
Problem
Conventional touch panels face issues with increased wiring area for sensor signal lines, leading to decreased visibility and touch performance due to the concentration of mesh patterns and the use of rhombus-shaped mesh patterns, which occupy a significant portion of the sensor cell area.
Innovation Solution
The touch panel employs a hexagonal mesh pattern for both the touch electrode and sensor signal line, with separation lines formed by parts of the hexagonal shape, reducing the visible wiring area and improving visibility by using conductive pastes like silver, palladium, niobium, tantalum, vanadium, indium, gallium, cadmium, zinc, and tin alloys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of unit patterns is reduced to increase resolution, then touch detection precision is improved, but the number of touch signal lines increases exponentially causing wiring area to increase
Solution Approach 1:
The sensor signal line and touch electrode are merged into a single integrated structure where the sensor signal line is formed between the two touch electrodes. This eliminates the need for separate wiring connections, reducing the number of signal lines and overall wiring area while maintaining high resolution touch detection capability.
2Ease of manufacture
If a rhombus-shaped mesh pattern is used for sensor signal lines, then manufacturing is simplified, but the wiring area occupies a significant portion of the sensor cell area reducing touch performance
Solution Approach 1:
The sensor signal line is repositioned from a lateral wiring configuration to an inter-electrode configuration, utilizing the vertical dimension between touch electrodes. This dimensional reorganization reduces the lateral wiring area while maintaining manufacturing feasibility through standard patterning processes.
3Reliability
If different sensor signal lines are separated to match touch electrode rows, then signal transmission is improved, but the proportion of wiring area increases causing decrease in touch performance
Solution Approach 1:
The sensor signal line serves multiple functions simultaneously: it acts as an electrical connection for signal transmission and as a structural element that defines the boundary between adjacent touch electrode units. This multi-functionality eliminates the need for separate dedicated wiring areas, reducing overall wiring proportion while ensuring reliable signal transmission.
4Area of stationary object
If mesh pattern concentration occurs in wire separation areas, then wiring area is reduced, but visibility of the touch panel deteriorates
Solution Approach 1:
The sensor signal line is extracted from the traditional lateral wiring position and repositioned to the inter-electrode region. This extraction removes the concentrated mesh pattern from the visible display area, improving visibility while maintaining compact wiring through the integrated electrode-signal line structure.
Data Source
AI summary
Disclosed is a touch panel having a touch electrode and a sensor signal line with improved visibility, and more particularly a touch panel having a touch electrode and a sensor signal line with improved visibility, the touch panel including a touch electrode configured to generate a touch signal by approach or touch of a touch means, a sensor signal line configured to transmit the touch signal generated by the touch electrode to a touch IC, and a mesh pattern formed on an inner surface of each of the touch electrode and the sensor signal line, wherein each of the mesh pattern of the touch electrode and the mesh pattern of the sensor signal line is formed by repeatedly patterning a hexagonal shape.