Touch Panel Groove Bridge Electrode Design
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Solution Overview
Problem
Conventional capacitive touch panels with bridge electrode structures compromise the evenness and thickness of the panel, leading to stress concentration and potential breakage, while also affecting the touch panel's performance due to the patterned design.
Innovation Solution
The touch panel design incorporates grooves in the base layer for bridge electrodes, with a filling layer and connection electrodes that connect sub-electrodes, reducing thickness and stress concentration through a bent wiring design and single patterning process, utilizing organic materials for enhanced flexibility and a passivation layer for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bridge electrodes are formed in conventional capacitive touch panels, then the touch panel can achieve multi-touch capability, but the patterned bridge electrodes thicken the touch panel and compromise the evenness of touch electrodes
Solution Approach 1:
The bridge electrodes are relocated from the front surface to grooves in the base layer, utilizing the vertical dimension (depth of grooves) to accommodate electrodes that would otherwise increase horizontal thickness. This dimensional relocation allows the electrodes to be embedded without compromising the evenness of the touch electrode surface.
2Adaptability or versatility
If bridge electrodes are formed in conventional capacitive touch panels, then the touch panel can achieve multi-touch capability, but the patterned bridge electrodes cause stress concentration and potential breakage
Solution Approach 1:
The bridge electrodes are nested within grooves in the base layer, surrounded by filling material. This nesting structure provides mechanical support and stress distribution, preventing the thin electrode material from concentrating stress and breaking under operational loads.
3Ease of manufacture
If bridge electrodes are formed first, then touch electrodes are disposed by forming via holes, but this multi-step process complicates the manufacturing process
Solution Approach 1:
The formation of bridge electrodes and touch electrodes is merged into a single patterning step. The bridge electrodes are formed in grooves during the same patterning process that creates the touch electrode patterns, eliminating the need for separate via hole formation steps and simplifying the overall manufacturing process.
Data Source
AI summary
A touch panel and a display device are provided. The touch panel includes a substrate; a base layer located on a side of the substrate, the base layer being provided with at least one groove, and each groove being located between two adjacent first sub-electrodes in a first direction and located between two adjacent second sub-electrodes in a second direction; at least one bridge electrode, each bridge electrode being located in the groove; a filling layer located on a side of the bridge electrode away from the groove; at least one connection electrode, each connection electrode being located on a side of the filling layer away from the groove, and configured to connect two adjacent first sub-electrodes in the first direction; where each bridge electrode is configured to connect two adjacent second sub-electrodes in the second direction.