Touch Panel Sensing Patterns Intersection Structures
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Solution Overview
Problem
Existing touch panels with combined electrostatic and pen touch functions face visibility issues and complex manufacturing processes due to overlap structures between intersecting sensing patterns in the view area, limiting display clarity and increasing production costs.
Innovation Solution
Implementing sensing patterns in two layers with an overlap structure in a separate region outside the view area, reducing the length of sensing pattern wires and using an overlap substrate to insulate and intersect the patterns, thereby minimizing resistance and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensing patterns are implemented in a single layer, then the manufacturing process is simpler, but overlap structures appear in the view area reducing visibility
Solution Approach 1:
The patent transitions from a single-layer sensing pattern to a two-layer structure, moving the overlap region from the view area to a non-view area. This dimensional change allows the sensing patterns to intersect outside the visible display region, eliminating the visibility problem while maintaining manufacturing feasibility.
Solution Approach 2:
The sensing pattern manufacturing process is segmented into two separate layers. The first layer contains sensing patterns in the view area, while the second layer contains the overlapping sensing patterns in the non-view area. This segmentation allows independent optimization of each layer's position and structure.
2Device complexity
If sensing patterns are implemented in a single layer, then fewer layers are used, but the fabrication process becomes complicated and multi-staged
Solution Approach 1:
By introducing a second layer for sensing patterns, the patent enables the overlap structures to be positioned in the non-view area. This dimensional addition simplifies the fabrication process by allowing standard multi-layer manufacturing techniques to be used, avoiding the need for complex single-layer processes.
3Adaptability or versatility
If sensing patterns have longer wires, then the patterns can be arranged flexibly, but resistance in detecting electric current increases
Solution Approach 1:
The patent uses a two-layer structure to reduce wire length by routing sensing pattern connections through the vertical dimension (between layers) rather than extending wires across the horizontal view area. This reduces resistance while maintaining arrangement flexibility.
4Ease of manufacture
If overlap structures are placed in the view area, then the sensing patterns can intersect, but display clarity is reduced
Solution Approach 1:
The patent extracts the overlap structures from the view area and places them in the non-view area. This separation allows the sensing patterns to intersect and function properly while keeping the view area clear for optimal display visibility.
Solution Approach 2:
The overlap region is relocated to a different spatial dimension (non-view area) relative to the view area, allowing intersection functionality to be separated from the visible display region.
Data Source
AI summary
A touch panel may have a pen touch and electrode touch function. More specifically, a touch panel may be capable of improving visibility of a view area and also simplifying a panel fabrication process by improving the wires of sensing patterns for a pen touch and disposing an overlap structure occurring between intersecting sensing patterns in a separate region other than a view area.