Touch Panel Bridging Structure for Visibility and ESD Resilience
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Solution Overview
Problem
Existing touch panels suffer from visibility issues due to differences in film structures causing varying light properties, which affect display quality, and are prone to static discharge damage.
Innovation Solution
Incorporating a bridging member with transparent holes that allow light to pass through, reducing visibility by matching light properties across the film structure and enhancing anti-static discharge capability by dividing the bridging member into sub-members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bridging member is made with a continuous film structure, then the light passing through it has different properties from the touch electrode areas, but this causes visibility issues and affects display quality
Solution Approach 1:
The bridging member is divided into multiple sub-bridging members by introducing transparent holes, which segments the continuous film structure. This segmentation allows light to pass through the transparent holes directly, creating a more uniform light property across the entire touch panel surface, including both touch electrode and bridging member areas, thereby improving display quality.
2Reliability
If the bridging member is made as a single continuous structure, then it provides good electrical connection, but it is vulnerable to static discharge damage
Solution Approach 1:
The bridging member is segmented into multiple sub-bridging members by transparent holes. This segmentation provides redundancy: if one sub-bridging member is damaged by static discharge, the other sub-bridging members can still maintain electrical connection, thereby improving anti-static discharge ability while maintaining structural functionality.
Solution Approach 2:
The transparent holes act as pre-designed weak points that can absorb or divert static discharge energy before it reaches critical areas. This beforehand cushioning protects the overall bridging member structure from complete failure during static discharge events.
3Strength
If the bridging member has a large contact area with insulating film, then adhesion is strong, but stress matching is poor
Solution Approach 1:
The transparent holes segment the contact area between the bridging member and insulating film. This reduces the total contact area, improving stress matching by allowing more uniform stress distribution across the remaining contact points. The adhesion is maintained at acceptable levels while stress matching is significantly improved.
Data Source
AI summary
The present disclosure relates to a touch panel and a touch display panel. The touch panel includes: a substrate including a front surface, including first and second directions that intersect with each other; first touch electrodes extending in the first direction and arranged in the second direction are disposed on the front surface, the first touch electrode includes first sub electrodes, and adjacent first sub electrodes are electrically connected to each other via a connecting member; second touch electrodes extending in the second direction and arranged in the first direction are further on the front surface, the second touch electrode includes second sub electrodes, and adjacent second sub electrodes are electrically connected to each other via a bridging member; the connecting member partially overlaps with the bridging member and is insulated from the bridging member; the bridging member is provided with at least one transparent hole penetrating the bridging member.