Touch Panel Sub-Bridge Obtuse Angle Geometry
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Solution Overview
Problem
Current touch panels face challenges in reducing visual visibility and optical interference of sub-bridges, which affect the display quality of touch screens, especially in mobile devices where aesthetics and user experience are crucial.
Innovation Solution
The design incorporates a touch panel structure with sub-bridges featuring obtuse angles and specific geometric configurations, including overlapping and insulated sub-edges, to minimize optical interference and visibility, while maintaining electrical connectivity and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional straight-line bridge structures are used to connect touch sub-electrodes, then electrical connectivity is ensured, but visual visibility and optical interference of the bridges increase
Solution Approach 1:
The bridge structure employs curved or angled segments instead of straight lines, forming obtuse angles (≥90°) at connection points. This curvature design reduces the bridge's visual profile and minimizes optical interference while maintaining electrical connectivity between touch sub-electrodes through the bent conductive path.
Solution Approach 2:
The bridge adopts an asymmetric geometry where connection segments form obtuse angles with the touch electrode edges rather than symmetric right angles. This asymmetric configuration optimizes both the reduction of visual visibility and the maintenance of electrical connection, breaking the traditional symmetric grid pattern that causes noticeable interference.
2Reliability
If bridge width is increased to ensure electrical connectivity, then conductivity improves, but visual visibility of the bridge increases
Solution Approach 1:
The bridge structure varies its width locally: wider segments are positioned where electrical connectivity is most critical (at connection points with touch electrodes), while narrower segments are used in intermediate regions. This local quality variation ensures adequate conductivity where needed while minimizing visual visibility in less critical areas.
Solution Approach 2:
The bridge design transitions from a uniform two-dimensional conductive path to a multi-dimensional structure with varying width along its length. By modulating the width dimension, the design achieves adequate electrical connectivity through wider sections while reducing visual visibility through narrower sections, effectively using dimensional variation to resolve the contradiction.
Data Source
AI summary
A touch panel and a touch display panel are provided. The touch panel includes a base substrate, a first touch sub-electrode, a second touch sub-electrode, and a bridge. The bridge includes a first sub-bridge and a second sub-bridge. The first sub-bridge has a first edge and a second edge, the first edge includes a first linear sub-edge and a second linear sub-edge directly connected to each other, and the second edge includes a third linear sub-edge and a fourth linear sub-edge directly connected to each other. An included angle between the first linear sub-edge and the second linear sub-edge is a first included angle α1, an included angle between the third linear sub-edge and the fourth linear sub-edge is a second included angle α2, and at least one of the first included angle α1 and the second included angle α2 is an obtuse angle.