Bridge Electrode Deformation Units for Display Panel Reliability
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Solution Overview
Problem
Touch control display panels often experience reliability issues due to the risk of short circuits or open circuits at bridge positions of electrode connections, affecting the overall performance and reliability of the display device.
Innovation Solution
A display panel design that includes a bridge connection layer, an insulating layer, and a touch control electrode layer, where the bridge connection layer features bridge electrodes with deformation units on its edges to prevent short circuits and ensure electrical connectivity between touch control electrodes, and a fabrication method that etches these electrodes to reduce edge slopes and prevent insulating layer breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If touch control electrodes are formed at the surface of the display panel without bonding process, then the structure is simplified and productivity is improved, but short circuit or open circuit is likely to occur at bridge positions affecting reliability
Solution Approach 1:
The patent applies local quality by creating deformation units (concave or convex structures) at specific bridge positions where electrodes connect. These localized structural modifications at critical connection points prevent short circuits and open circuits without requiring changes to the entire electrode structure or additional bonding processes, thus maintaining high productivity while improving reliability at vulnerable locations.
2Ease of manufacture
If bridge electrodes are formed with standard edge structure, then manufacturing is simple, but edge slopes may cause insulating layer breakdown and short circuits
Solution Approach 1:
The deformation units create localized structural variations at bridge electrode edges, forming concave or convex structures that reduce edge slopes. This local modification prevents insulating layer breakdown at critical edge positions while maintaining the overall simplicity of the manufacturing process, as the deformation units are integrated into the existing electrode formation steps without requiring additional complex processes.
3Adaptability or versatility
If multiple touch control electrodes are provided for comprehensive touch detection, then touch control functionality is improved, but the complexity of electrode connections and bridge positions increases
Solution Approach 1:
The patent applies segmentation by dividing the touch control electrode into multiple independent electrodes (first touch control electrode and second touch control electrode) that can be independently formed and connected through bridge electrodes. This segmentation allows comprehensive touch detection functionality while managing complexity through modular design, where each electrode and bridge connection can be optimized independently.
Solution Approach 2:
Deformation units are selectively applied at specific bridge positions connecting different touch control electrodes, providing localized structural reinforcement where connections are needed without adding complexity to the entire electrode system. This approach enables comprehensive touch functionality while keeping the connection structure manageable through targeted modifications at critical junctions.
Data Source
AI summary
A display panel and its fabrication method are provided. The display panel includes a display function layer and a touch control function layer. The touch control function layer includes a bridge connection layer with a bridge electrode, an insulating layer, and a touch control electrode layer disposed sequentially on a light-exiting side of the display function layer. The touch control electrode layer includes first touch control electrodes and second touch control electrodes insulated from each other. Each first touch control electrode includes first electrode units electrically connected to each other. Each second touch control electrode includes second electrode units electrically connected to each other. Two adjacent first electrode units are connected to each other through the bridge electrode. The bridge electrode includes a first edge, a second edge, and a deformation unit including a first deformation part and a second deformation part.