Touch Substrate Bridge and Shielding Layout for Notch Regions
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Solution Overview
Problem
Existing touch substrates face challenges in connecting disconnected touch electrodes at notch regions and rounded corners while preventing signal interference, which affects touch performance in narrow frame or full screen designs.
Innovation Solution
The touch substrate includes a bridge line to reconnect disconnected touch electrodes and a shielding line to prevent signal interference between the bridge line and touch-driving connection line, using a layered and overlapping design to enhance electrical connectivity and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bridge line is added to connect disconnected touch electrodes at the notch region, then electrical connectivity is improved, but signal interference between the bridge line and touch-driving connection line increases
Solution Approach 1:
A shielding line is introduced as an intermediary element between the bridge line and the touch-driving connection line. The shielding line acts as a mediator that blocks electromagnetic interference from the bridge line from affecting the touch-driving connection line, thereby maintaining signal integrity while preserving the electrical connectivity function of the bridge line.
Solution Approach 2:
The shielding function is extracted as a separate, dedicated component (the shielding line) rather than being integrated into the bridge line or touch-driving connection line themselves. This separation allows the bridge line to focus on electrical connectivity while the shielding line专门 handles interference protection.
2Reliability
If the bridge line extends along the edge of the notch region to connect disconnected electrodes, then connectivity is restored, but the complexity of the substrate design increases
Solution Approach 1:
The bridge line is designed to extend in the second direction (along the edge of the notch region) rather than attempting to connect directly across the notch in the first direction. This dimensional change in routing strategy allows the bridge line to bypass the disconnected electrode gap while following the natural edge contour, reducing design complexity compared to more direct routing attempts.
Data Source
AI summary
A touch substrate and a touch display device are provided. The touch substrate includes a touch region and a notch region, the touch substrate further includes a plurality of touch-driving connection lines connected to a plurality of first touch electrodes, the plurality of second touch electrodes includes at least one second disconnection touch electrode, each of the at least one second disconnection touch electrode includes a first sub portion and a second sub portion, the touch substrate further includes a bridge line and a shielding line, the bridge line connects the first sub portion and the second sub portion, an orthographic projection of at least a part of the shielding line on the base substrate is between an orthographic projection of the bridge line on the base substrate and an orthographic projection of the touch-driving connection line on the base substrate.