Touch Panel Electrode Angles to Eliminate Moiré Interference
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Solution Overview
Problem
The Moiré phenomenon occurs when the electrode patterns on a touch panel intersect with the pixel layout of an LCD, causing optical interference, and existing designs fail to effectively prevent this issue due to regular pattern alignment.
Innovation Solution
The touch panel design features touch units with driving and sensing lines that have edges with turning angles unparallel to the X or Y axis of the pixel layout, disrupting the regularity and preventing Moiré interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the electrode patterns are designed parallel to the pixel layout axes to simplify manufacturing, then the manufacturing precision is improved, but the Moiré phenomenon occurs causing optical interference
Solution Approach 1:
The patent applies asymmetry by designing the electrode patterns with edges that are not parallel to the pixel layout axes. Specifically, the first and second driving lines and sensing lines are configured with edges at angles other than 0, 90, or 180 degrees relative to the pixel axes, disrupting the regular alignment that causes Moiré interference while maintaining manufacturability
Solution Approach 2:
The patent changes the angular parameter of the electrode pattern edges. Instead of using edges parallel to the X or Y axes (0, 90, or 180 degrees), the design specifies that edges should have turning angles that are not parallel to these axes, thereby changing the geometric parameter to eliminate optical interference
2Device complexity
If the electrode patterns use regular rectangular arrangements to simplify design, then the device complexity is reduced, but the Moiré interference phenomenon occurs
Solution Approach 1:
The patent introduces asymmetry into the otherwise regular rectangular electrode pattern by tilting the edges of the driving and sensing lines. The lines maintain their rectangular routing but with edges at non-axis-aligned angles, breaking the symmetry that causes Moiré interference while preserving the simplicity of the overall design
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
This design effectively eliminates the Moiré phenomenon by ensuring that the edges of the touch panel lines are at angles other than 0, 90, or 180 degrees relative to the pixel layout axes, thereby avoiding optical interference.
Implementation Method 1
When the electrode patterns on a touch panel are designed, the pixels are closer to one another with a smaller pitch, and the pixels are parallel to the electrode patterns, it is easy for a Moiré phenomenon to appear when the pixels overlap the electrode patterns
Data Source
AI summary
Configurations of patterns on a touch panel and methods thereof are proposed. The proposed pattern uses a design unparallel to either one of the X axis and the Y axis of a black matrix of a pixel layout of an LCD panel to resolve the Moiré Phenomenon resulting from the interference between the touch panel and the pixel layout.