Oblique-Angle Moire Evaluation for Display Pattern Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing moire evaluation methods primarily assess moire from an orthographic viewing angle and fail to effectively evaluate moire in display devices from an oblique viewing angle, which is crucial for ensuring optimal display performance.
Innovation Solution
A method and device for quantitative moire evaluation that involves obtaining images of periodic pattern layers, determining coordinates and pixel values based on viewing distance and angle, and superimposing images to convert and evaluate moire, using a dielectric layer's thickness and refractive index to account for oblique light paths, without requiring complex three-dimensional calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing moire evaluation methods are used, then moire can be evaluated from an orthographic viewing angle, but moire cannot be effectively evaluated from an oblique viewing angle
Solution Approach 1:
The patent changes the viewing angle parameter from orthographic (0 degrees) to oblique angles, and adjusts the light path calculation to account for refractive index and thickness of the dielectric layer. This allows the evaluation method to adapt to different viewing conditions while maintaining measurement accuracy through mathematical transformation of the moire pattern coordinates based on the oblique angle and optical properties.
2Measurement precision
If complex three-dimensional calculations are performed to account for oblique light paths, then accurate oblique viewing angle evaluation can be achieved, but calculation complexity increases
Solution Approach 1:
The patent creates a two-dimensional projection model that copies the essential optical behavior of the three-dimensional oblique light path through the dielectric layer. Instead of performing full 3D ray tracing calculations, the method uses a simplified 2D coordinate transformation that incorporates the refractive index and thickness effects, achieving accurate oblique viewing angle evaluation with reduced computational complexity.
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
Enables accurate moire evaluation from an oblique viewing angle, improving display device design by quantitatively assessing moire and guiding design adjustments to minimize its impact, thus enhancing display quality.
Implementation Method 1
according to the coordinates of each of the first image units and a thickness and a refractive index of a dielectric layer disposed between the first pattern layer and the second pattern layer, determining coordinates of projection image units on the second pattern layer each of which corresponds to a corresponding one of the first image units along an oblique view light path
Data Source
AI summary
The present disclosure relates to a moire quantitative evaluation method. The method includes obtaining an image of a first pattern layer; obtaining coordinates of each of the first image units; according to the coordinates of each of the first image units and a thickness and a refractive index of a dielectric layer, determining coordinates of projection image units each of which corresponds to a corresponding one of the first image units along an oblique view light path; determining a pixel value of each of the projection image units according to pixel values of second image units in each of the surrounding regions to obtain an oblique view image; superimposing the image of the first pattern layer and the oblique view image to obtain a first superimposed image; converting the first superimposed image into a moire image; and performing a moire quantitative evaluation according to the moire image.