Metal Mesh Touch Display With Astigmatic Light Scattering
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Solution Overview
Problem
Existing touch display devices suffer from the gray grid problem due to optical interference caused by metal mesh touch electrodes, which cannot be resolved by adjusting pixel area or metal mesh dimensions without compromising resolution or touch sensitivity.
Innovation Solution
A metal mesh touch display device with an astigmatic microstructure layer between the display unit and the metal mesh touch unit, maintaining the display unit's configuration and metal mesh dimensions, and adjusting the distance between them to reduce light blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the metal mesh dimensions are adjusted to reduce gray grid problem, then the visual effect is improved, but the touch sensitivity deteriorates
Solution Approach 1:
An intermediary microstructure layer is introduced between the display unit and the metal mesh touch unit. This microstructure layer acts as a mediator that scatters light before it reaches the metal mesh, reducing the gray grid effect without requiring changes to the metal mesh dimensions or the display pixel configuration, thereby preserving touch sensitivity.
Solution Approach 2:
The invention changes the optical parameters of the system by introducing a microstructure layer with specific geometric characteristics (astigmatic or light-diverging microstructures) that alter light propagation. This allows the metal mesh to maintain its original dimensions and touch sensitivity while the overall optical system is modified to reduce gray grid visibility.
2Object-affected harmful factors
If the pixel area is increased to resolve gray grid problem, then the visual effect is improved, but the resolution density deteriorates
Solution Approach 1:
The microstructure layer serves as an intermediary that provides optical interference management without requiring changes to the display unit's pixel configuration. By scattering light at the microstructure layer, the system reduces gray grid effects while maintaining the original high-resolution pixel density of the display unit.
Solution Approach 2:
Instead of mechanically changing the pixel size or metal mesh dimensions, the invention uses an optical field approach by introducing a microstructure layer that manipulates light propagation. This substitution allows the system to achieve visual improvement without altering the physical dimensions of pixels or metal mesh.
3Object-affected harmful factors
If the metal line width is reduced to reduce gray grid problem, then the visual effect is improved, but the electrical impedance increases
Solution Approach 1:
The microstructure layer acts as an intermediary that reduces the need for metal line width adjustment. By scattering light before it reaches the metal mesh, the system can maintain wider metal lines (lower electrical impedance) while still reducing gray grid effects, thus resolving the contradiction between visual quality and electrical performance.
Solution Approach 2:
The invention changes the optical path parameters by introducing a microstructure layer, which allows the metal line width to be optimized for electrical conductivity rather than being constrained by the need to reduce gray grid effects. This parameter change enables wider metal lines that maintain lower electrical impedance.
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
Resolves the gray grid problem while maintaining high resolution and touch sensitivity by scattering light to reduce the probability of blockage and minimizing shaded areas.
Implementation Method 1
the microstructure layer can scatter light to reduce the probability of blockage and minimize shaded areas
Data Source
AI summary
The present disclosure provides a metal mesh touch display device, including a metal mesh touch unit, having a metal line width greater than 2.5 μm and/or an area of a mesh node greater than 80 μm2; a display unit, having a plurality of light emitting pixels wherein the light emitting pixel density of the display unit is greater than 150 ppi; and a microstructure layer located between the display unit and the metal mesh touch unit and having a substrate layer and a microstructure, wherein the distance between the surface of the display unit and the metal mesh touch unit is greater than 0.2 mm.