Display Panel Metal Layer Layout for Moiré Suppression
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Solution Overview
Problem
Moiré fringes occur in display panels due to the periodic structure of metal film layers bonded to the pixel layer, affecting the display effect and requiring improved bonding accuracy and reduced layer stacking.
Innovation Solution
A display panel design where a metal layer with periodically arranged metal conductive structures is positioned between the display function layer and the display surface, with the periods of the metal layer and pixel units in a relationship of an integral multiple, reducing the visibility of moiré fringes by ensuring the new pattern generated after bonding remains below human eye resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If metal film layers with periodic structure are bonded to the pixel layer, then the stacking of film layers is reduced and lightness and thinness are achieved, but pixel opening area is blocked leading to moiré fringes that affect display effect
Solution Approach 1:
The patent applies asymmetry by making the period of the metal conductive structures different from the period of the pixel units. Specifically, the metal layer period is designed to be an integer multiple (2-5 times) of the pixel unit period, breaking the periodic coincidence that causes moiré fringes. This asymmetric periodic relationship eliminates the harmful interference patterns while maintaining the bonding structure.
Solution Approach 2:
The patent changes the periodic parameter of the metal layer to resolve the contradiction. By adjusting the period of metal conductive structures to be an integer multiple of the pixel unit period, the design modifies the spatial frequency relationship between layers. This parameter change ensures that the combined periodic pattern remains below human eye resolution, eliminating visible moiré fringes while preserving the reduced stacking benefit.
2Ease of manufacture
If metal film layers are bonded to the pixel layer, then functions are performed and layer stacking is reduced, but bonding accuracy must be improved to avoid visible periodic patterns
Solution Approach 1:
The patent changes the periodic parameter of the metal layer to be an integer multiple of the pixel unit period. This parameter modification makes the bonding process more tolerant to misalignment, as the asymmetric periodic relationship prevents the formation of visible moiré fringes even with moderate bonding variations, thereby reducing the stringent requirements for bonding accuracy.
3Weight of stationary object
If periodic structure is used in metal layer, then lightness and thinness are achieved, but the new pattern generated after bonding may be visible to human eye
Solution Approach 1:
The patent changes the spatial frequency parameter by setting the metal layer period to be an integer multiple (2-5 times) of the pixel unit period. This parameter adjustment ensures that the combined periodic pattern has a sufficiently large period that it remains below the resolution threshold of the human eye, making the pattern invisible while maintaining the lightweight structure.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a metal layer and a display function layer, and the metal layer is located between the display function layer and a display surface of the display panel; the metal layer includes multiple metal conductive structures, and the multiple metal conductive structures are arranged with a period, and are arranged in a first direction with a first period; the display function layer includes multiple pixel units, and the multiple pixel units are arranged with a period, and are arranged in a second direction with a second period; the first period and the second period are in a relationship of an integral multiple.