Metal Mesh Touch Panel Irregular Openings Moiré Suppression
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Solution Overview
Problem
Touch panels with metal meshes experience optical interference issues, leading to unwanted constructive interference and image distortions like moiré patterns, which affect the display quality and user input recognition.
Innovation Solution
The touch panel and display device incorporate a metal mesh with an irregular matrix shape, where adjacent openings have different areas, reducing optical interference by minimizing the intersection points and maintaining low electric resistance for improved signal sensitivity and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal mesh is used in the touch sensor part, then electrical conductivity and touch sensitivity are improved, but optical interference and moiré patterns occur
Solution Approach 1:
The patent applies asymmetry by making adjacent openings in the metal mesh have different areas. This irregular pattern disrupts the periodic structure that causes constructive interference and moiré patterns, while still maintaining the overall metal mesh configuration needed for electrical conductivity and touch sensitivity.
2Manufacturing precision
If a regular metal mesh pattern is used, then manufacturing precision is improved, but optical interference occurs due to constructive interference
Solution Approach 1:
The patent introduces asymmetry by varying the areas of adjacent openings in the metal mesh. This irregular pattern eliminates the periodic structure responsible for constructive interference and moiré patterns, while still allowing for precise manufacturing through controlled variation of opening sizes.
Data Source
AI summary
A touch panel including: a substrate; and a touch sensor part positioned on the substrate and including a metal mesh forming a plurality of openings. Openings which are adjacent to each other among the plurality of openings have different sizes of areas. A display device including: a display panel including a plurality of pixels; and a touch sensor part disposed on the display panel to cover the plurality of pixels and including a metal mesh forming a plurality of openings. Openings which are adjacent to each other among the plurality of openings have different sizes of areas.