Display Substrate Mesh Lightness Contrast for Moire Fringe Elimination
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Solution Overview
Problem
Moire fringes interference in flat panel display devices, caused by the interaction between touch electrodes and display panel mesh structures, is a significant optical issue that existing solutions, such as reducing the period of the mesh structure, are limited in effectiveness and complexity.
Innovation Solution
A display substrate design featuring mesh structures with the same periodic arrangement but differing in lightness, where one structure includes touch electrodes and the other includes an interference eliminating layer made of a material with a contrasting lightness, such as dark and bright materials, to minimize lightness contrast and eliminate Moire fringes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes are provided to cross each other in the gaps between sub-pixels, then touch function is integrated, but Moire fringes are formed due to interference between mesh structures
Solution Approach 1:
The patent applies color/lightness changes by making the pixel spacer layer transparent or translucent, allowing light to pass through without forming Moire fringes. This resolves the contradiction by changing the optical properties of the mesh structure material rather than altering the geometric arrangement.
Solution Approach 2:
The patent changes the optical parameters (transparency, translucency) of the pixel spacer layer material to eliminate Moire fringes while maintaining the mesh structure's geometric arrangement and touch functionality.
2Object-affected harmful factors
If the period of the Moire fringes is reduced to eliminate them, then Moire fringes are reduced, but the solution is limited by resistance and uniformity of the mesh structure
Solution Approach 1:
Instead of reducing the period (geometric parameter), the patent changes the optical properties (transparency/translucency) of the mesh structure material, providing a simpler solution that doesn't constrain the mesh structure's resistance and uniformity.
Solution Approach 2:
The patent changes the optical parameters of the material rather than the geometric parameters, avoiding the limitations associated with mesh structure resistance and uniformity that arise when trying to reduce the period.
Data Source
AI summary
A display substrate comprises a first structure and a second structure which are provided in a stack, two sides, opposite to each other, of the first structure and the second structure comprise mesh structures having a same periodic arrangement, respectively, wherein a lightness of a color of the mesh structure of the first structure is different from a lightness of a color of the mesh structure of the second structure.