Touch Panel Non-Stright Routing Reduces Pattern Visibility
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Solution Overview
Problem
Touch panels with a single electrode layer face issues of pattern visibility and increased thickness due to straight routing of transmission lines, which complicates integration with mobile devices and increases manufacturing costs.
Innovation Solution
The touch panel design features non-straight routing of transmission lines and conductive points, with sensing channels and control chips integrated on a single substrate, reducing the number of transmission lines and enhancing displaying performance by using geometrically corresponding holes and conductive points on a flexible printed circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If straight routing is used for transmission lines, then the manufacturing process is simple, but pattern visibility occurs and displaying performance deteriorates
Solution Approach 1:
The patent applies curvature by replacing straight routing with non-straight routing (curved or zigzag paths) for transmission lines. This curvature modification eliminates the pattern visibility issue while maintaining manufacturing feasibility, as the routing can still be formed through standard lithography and etching processes.
Solution Approach 2:
The patent introduces asymmetry in routing paths by making transmission lines follow non-uniform, non-straight trajectories. This asymmetric design breaks the symmetry that causes visible patterns, thereby improving displaying performance without significantly complicating the manufacturing process.
2Reliability
If many transmission lines are used for signal transmission, then signal transmission capability is improved, but the area and thickness of the flexible printed circuit board increase
Solution Approach 1:
The patent utilizes the dimensionality change principle by routing transmission lines non-straightly, effectively using vertical and diagonal dimensions in addition to horizontal routing. This allows more transmission lines to be accommodated within the same planar area, reducing the overall area required for the flexible printed circuit board while maintaining signal transmission capability.
Solution Approach 2:
The patent implements nesting by arranging transmission lines in a compact, space-efficient manner with non-straight routing. This allows multiple transmission lines to be nested or packed more densely within the available space, reducing the total area occupied by the flexible printed circuit board while preserving the number of transmission lines needed for reliable signal transmission.
3Reliability
If many transmission lines are used for signal transmission, then signal transmission capability is improved, but the thickness of the flexible printed circuit board increases
Solution Approach 1:
The patent applies dimensionality change by utilizing vertical and diagonal routing paths for transmission lines, which allows the lines to be arranged in three-dimensional space more efficiently. This reduces the cumulative thickness required for multiple transmission lines while maintaining the same signal transmission capability.
4Device complexity
If straight routing is used for transmission lines, then the layout is simple, but pattern visibility occurs when viewed at certain angles
Solution Approach 1:
The patent uses curvature to transform straight transmission lines into non-straight paths. This visual transformation eliminates the harmful pattern visibility effect when viewed at certain angles, while the layout remains relatively simple and manageable through standard fabrication processes.
Data Source
AI summary
The invention provides a touch panel with a single electrode layer, which has a plurality of sensing channels. Each of the sensing channels includes a plurality of first transmission lines, a second transmission line and a plurality of first and second sensing electrodes on a substrate. The routing path of the first and second transmission lines routed on the substrate is non-straight. And, the first sensing electrodes and the second sensing electrodes include a plurality of first holes and second holes, respectively. The second sensing electrodes and the first sensing electrodes are disposed on the same side of the substrate. The geometric shapes of the first holes and the second holes correspond to the geometric shapes of the routing path of the first transmission lines and the second transmission line routed on the substrate. Thereby, the display quality can be improved by the touch panel of the present invention.