Touch Trace Protrusion Layout for Shear-Resistant Display Panels
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Solution Overview
Problem
The touch control metal leads in the fan-out area of display panels are prone to breakage due to stress from external forces, leading to poor touch control functionality.
Innovation Solution
The display panel design includes touch control traces with protrusions on the left and right sides of the first linear part, which are alternately distributed and connected to a second linear part, forming a circuitous structure that compensates for deformation and reduces stress when subjected to shear forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the TP_trace is formed on a non-metallic film layer by physical vapor deposition process, then the touch control function can be integrated into the liquid crystal display panel, but large stress exists between the TP_trace and the non-metallic film layer causing the TP_trace to be prone to breakage when dropped or subjected to external forces
Solution Approach 1:
The TP_trace is divided into multiple segments by adding protrusions that create gaps between adjacent linear parts. This segmentation allows each segment to move independently under stress, preventing crack propagation and trace breakage while maintaining the overall conductive path for touch control functionality.
Solution Approach 2:
Protrusions are added to the TP_trace structure in advance to create stress-absorbing elements before external forces are applied. These protrusions act as cushioning features that deform under stress, absorbing energy and protecting the linear parts from breakage during drops or other external impacts.
2Ease of manufacture
If the TP_trace is formed as a linear structure in the fan-out area, then the manufacturing process is simplified, but the TP_trace is prone to breakage when subjected to external forces
Solution Approach 1:
The linear TP_trace structure is modified by adding protrusions that create curved or non-linear segments. This curvature allows the trace to better absorb and distribute mechanical stress, preventing breakage under external forces while maintaining compatibility with standard fabrication processes.
Solution Approach 2:
The protrusions are strategically positioned at specific locations along the TP_trace where stress concentration is most likely to occur. This local modification provides enhanced stress resistance at critical points while maintaining the overall simplicity of the linear trace structure in non-critical areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The protrusion structure effectively buffers stress on the touch control traces, preventing breakage and ensuring reliable touch control functionality even under external forces.
Implementation Method 1
a left side and a right side of the first linear part are provided with protrusions... the protrusion structure effectively buffers stress on the touch control traces, preventing breakage
Data Source
AI summary
The present invention provides a display panel, including a substrate, a dielectric layer, and a sensing electrode layer. Touch control traces are disposed in the dielectric layer. In the present invention, protrusions are disposed on left and right sides of a first linear part of the touch control traces. When the touch control traces are subjected to shear stress, diagonal directions of the protrusions on the left and right sides compensate for a deformation of the panel and buffer the stress on the touch control traces, reducing the stress on the touch control traces and preventing trace breakage.