Flexible Touch Substrate Stress Distribution via Segmented Electrodes
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Solution Overview
Problem
Conventional capacitive touch panels with integral touch driving and inductive electrodes suffer from brittle fracture when used in flexible display devices, reducing their flexibility and quality due to concentrated stress upon bending.
Innovation Solution
A touch substrate with touch units arranged in rows and columns, where first and second electrodes are crosswise and insulated, connected by signal lines, allowing for stress distribution and reducing the risk of fracture, with signal lines made of materials with good bending properties like silver, copper, or aluminum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional integral touch electrodes are used, then the touch panel structure is simple, but the film layer suffers from brittle fracture when bent
Solution Approach 1:
The touch substrate is divided into multiple independent touch units arranged in an array, where each unit contains segmented first and second electrodes. These electrodes are connected through signal lines that allow relative movement, enabling the structure to accommodate bending without fracture while maintaining electrical connectivity.
2Adaptability or versatility
If the touch layer is made flexible, then the display device can be bent, but the conventional integral electrode structure causes brittle fracture
Solution Approach 1:
The signal lines connecting the electrodes are designed to be flexible and capable of relative movement with respect to the electrodes and substrate. This dynamic design allows the electrode structure to adapt to bending deformations without causing stress concentration that would lead to fracture, thereby maintaining both flexibility and structural strength.
Data Source
AI summary
A touch substrate, a method for manufacturing a touch substrate, and a display device are disclosed. The touch substrate includes a substrate and a plurality of touch units spaced apart from each other on the substrate. The plurality of touch units are arranged in rows and columns. Each of the plurality of touch units includes a first electrode and a second electrode. The first electrode and the second electrode are arranged crosswise and insulated and spaced apart from each other. The first electrodes of the adjacent touch units in one of the columns are connected by a first signal line, and the second electrodes of the adjacent touch units in one of the rows are connected by a second signal line.