Conductive Film Wiring Pattern for 3D Display Moire Suppression
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Solution Overview
Problem
Conductive films used in display devices suffer from moire interference and visibility issues when transitioning from a planar to a three-dimensional shape, leading to image quality deterioration and graininess, particularly on touch panels.
Innovation Solution
A conductive film with a transparent base and thin metal wires forming a mesh pattern is designed to maintain uniform mesh density and optimize projection wiring patterns for three-dimensional shapes, using a method that evaluates and determines the wiring pattern to prevent moire interference and enhance visibility by calculating a moire evaluation index within predetermined ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a planar conductive film with optimized wiring pattern is used on a flat display surface, then moire interference is reduced and visibility is improved, but when the display surface is curved or three-dimensional, the spatial frequency changes and moire occurs in curved portions
Solution Approach 1:
The patent transitions from designing two-dimensional planar wiring patterns to three-dimensional wiring patterns that conform to curved and three-dimensional display surfaces. The wiring pattern is designed in three-dimensional space to maintain appropriate spatial frequency relationships with the pixel array pattern even when the display surface is curved, preventing moire interference in both flat and three-dimensional configurations.
2Manufacturing precision
If the wiring pattern spatial frequency is optimized for flat surfaces, then visibility is improved, but the pattern becomes distorted when applied to curved surfaces
Solution Approach 1:
The wiring pattern is designed to dynamically adapt to the curvature of the display surface. The three-dimensional wiring pattern configuration allows the spatial frequency to automatically adjust according to the local curvature, maintaining optimal visibility and preventing moire interference across varying surface geometries without requiring separate optimization for each curvature radius.
3Object-affected harmful factors
If a mesh pattern with thin metal wires is used to reduce moire, then visibility is improved, but the pattern complexity increases
Solution Approach 1:
The patent systematically varies key parameters of the mesh pattern including wire diameter, mesh size, wire spacing, and inclination angles to optimize the balance between moire reduction and pattern complexity. By establishing specific parameter ranges and relationships, the design achieves effective moire suppression while maintaining manufacturability and avoiding excessive complexity.
Data Source
AI summary
For the frequencies and intensities of moire obtained by applying the human visual response characteristics to the frequency information and intensity information of moire which are respectively calculated from the peak frequencies and peak intensities of a two-dimensional Fourier spectrum of the transmittance image data of a wiring pattern and the peak frequencies and peak intensities of a two-dimensional Fourier spectrum of the transmittance image data of a pixel array pattern, the sum of the intensities of moire with frequencies which are within a predetermined frequency range that is determined according to the visual response characteristics is equal to or less than a predetermined value.