Flexible Touch Panel Bridge Orientation for Stress Distribution
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Solution Overview
Problem
Flexible touch panels and display devices face damage from stress when bridges in the touch sensor unit are subjected to bending, leading to potential disconnection and failure.
Innovation Solution
A flexible touch panel and display device design featuring a flexible substrate bent in a first direction, with a touch sensor unit including bridges that extend in a second direction intersecting the first direction, thereby distributing stress laterally and reducing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible substrate is bent in a first direction, then the touch panel achieves flexibility and can be bent, but the bridges in the touch sensor unit are damaged from stress when bent
Solution Approach 1:
The bridge is configured to extend in a second direction that intersects the first direction of substrate bending. This dimensional reorientation allows the bridge to span across the bending direction, distributing stress laterally and preventing damage while preserving the flexibility of the touch panel.
2Device complexity
If the bridge extends parallel to the bending direction, then the structure is simple, but the bridge is damaged from stress when bent
Solution Approach 1:
Instead of extending the bridge parallel to the bending direction (simple configuration), the bridge is oriented to extend in an intersecting direction. This dimensional change increases structural complexity slightly but dramatically improves reliability by distributing bending stress laterally across the bridge structure.
3Strength
If the bridge is made from a rigid material, then the bridge provides strong electrical connection, but the bridge is damaged from stress when bent
Solution Approach 1:
The bridge maintains its rigid material composition for strong electrical connection, but its orientation is changed to extend in a direction intersecting the bend. This dimensional reorientation allows the rigid bridge to withstand bending stresses by distributing loads laterally, preserving both connection strength and integrity during flexing.
Data Source
AI summary
A flexible touch panel including a flexible substrate bent in a first direction, and a touch sensor unit disposed on the flexible substrate, the touch sensor unit including a bridge extending in a second direction intersecting the first direction.