Metal Mesh Touch Sensor Curved Wire Geometry
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Solution Overview
Problem
Conventional touch control display panels using transparent conductive glass, such as ITO, suffer from high resistance, leading to insufficient sensitivity in detecting touch controls.
Innovation Solution
The use of metal mesh electrodes with curved wires as touch control sensing strip electrodes, which reduces resistance and enhances sensitivity by eliminating sharp corners and optimizing wire connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent conductive glass (ITO) is used to manufacture the touch control electrode, then the touch control display panel can be manufactured with conventional materials and processes, but the resistance is larger causing insufficient sensitivity
Solution Approach 1:
The patent employs a composite structure combining transparent conductive glass substrate with metal mesh electrodes deposited on top. This composite approach leverages the transparency and mechanical properties of glass while incorporating the low resistance characteristics of metal, thereby achieving both manufacturing feasibility and improved touch sensitivity
Solution Approach 2:
The patent changes the electrical parameters of the touch control electrode by transitioning from pure transparent conductive glass to a metal mesh structure on glass substrate. This parameter change significantly reduces resistance while maintaining transparency, resolving the contradiction between sensitivity and manufacturability
2Reliability
If metal mesh electrode with zig-zag wires is used as the touch control electrode, then the resistance is reduced compared to transparent conductive glass, but many sharp pointed angles are present causing larger transverse resistance
Solution Approach 1:
The patent replaces the zig-zag wire geometry with curved metal mesh patterns. The curved design eliminates sharp pointed angles that cause high transverse resistance, while maintaining the low resistance advantage of metal structures. This geometric optimization directly addresses the shape-related resistance issue
3Reliability
If metal wires in horizontal direction have long stretch to reduce resistance, then the electrical conductivity is improved, but the transverse resistance becomes larger due to the long path length
Solution Approach 1:
The patent transitions from one-dimensional long stretch wires to a two-dimensional metal mesh structure. This dimensional change allows current to flow through multiple parallel paths across the mesh, effectively reducing transverse resistance without requiring excessively long wire stretches in any single direction
Data Source
AI summary
An integrated touch control display panel and a display apparatus are disclosed. The integrated touch control display panel comprises a touch-control-emitting-electrode-array including a plurality of touch control emitting strip electrodes arranged along a first direction; and a touch-control-sensing-electrode-array including a plurality of touch control sensing strip electrodes arranged along a second direction. An orthogonal projection of any touch control sensing strip electrode to the touch-control-emitting-electrode-array at least partially overlaps with any of the touch control emitting strip electrodes; and the touch control sensing strip electrodes are metal mesh electrodes, the metal mesh electrodes comprising a plurality of metal curves. This can reduce the resistance of the touch control sensing strip electrode, such that the integrated touch control display panel and the display apparatus have a more sensitive touch control sensing effect.