Birefringent Layer for Moiré Suppression in Display Devices
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Solution Overview
Problem
Moiré effects significantly affect the display quality of electrophoretic display devices due to optical interference between metal grids on touch panels and color blocks printed on the display panel.
Innovation Solution
Incorporating a birefringent material layer between the color blocks and the touch panel to divide light into ordinary and extraordinary components, which are laterally shifted, thereby scattering light and disrupting the regularity causing the moiré effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color blocks are printed on the display panel to achieve color display, then color display effect is improved, but moiré effect is generated due to optical interference with metal grid touch panel
Solution Approach 1:
A birefringent material layer is introduced as an intermediary between the color blocks and the touch panel. This layer divides incident light into ordinary and extraordinary rays with different polarization states, scattering the light and destroying the regular optical interference pattern between the color blocks and metal grid, thereby suppressing the moiré effect while preserving color display functionality
Solution Approach 2:
The patent changes the optical parameters of the system by introducing a birefringent material with specific refractive index differences. This material alters the polarization and propagation paths of light, transforming the regular interference pattern into a scattered pattern that eliminates the moiré effect
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
Effectively suppresses the moiré effect by scattering light and breaking the regular pattern between color blocks and touch panel structures, enhancing display quality.
Implementation Method 1
The birefringent material layer is disposed between the color blocks with different colors and the touch panel. After passing through the birefringent material layer, a light from the color blocks with different colors is divided into an ordinary light and an extraordinary light laterally shifted by a distance from the ordinary light.
Data Source
AI summary
Disclosed is a display device including a display panel, a plurality of color blocks with different colors, a touch panel, and at least one birefringent material layer. The color blocks with different colors are distributed on the display panel. The touch panel is disposed on the color blocks with different colors. The birefringent material layer is disposed between the color blocks with different colors and the touch panel. After passing through the birefringent material layer, a light from the color blocks with different colors is divided into an ordinary light and an extraordinary light laterally shifted by a distance from the ordinary light.