Foldable Display Window Grooves for Moire Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Foldable display devices face challenges in maintaining display quality and preventing the perception of boundaries between folding and non-folding areas due to moire phenomena and resolution degradation, especially when repeatedly folded or unfolded.
Innovation Solution
A display device design featuring a substrate with distinct light emitting areas in folding and non-folding regions, diffraction patterns, and a window with alternating grooves, which enhances light emission and reduces boundary visibility by adjusting pixel and diffraction pattern intervals and heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display device is made foldable to improve portability and user convenience, then the device can be repeatedly folded or unfolded, but moire phenomena and resolution degradation occur in the folding area, reducing display quality
Solution Approach 1:
The patent applies different pixel sizes and arrangements in different areas of the display. Specifically, the folding area has a first pixel size while the non-folding area has a second pixel size, with the ratio of first to second pixel size being 0.95 to 1.05. This local differentiation allows the folding area to maintain adequate display quality while accommodating the mechanical stress of folding, thereby resolving the contradiction between portability and display quality.
2Manufacturing precision
If the pixel size in the folding area is increased to maintain display quality, then resolution degradation is reduced, but the boundary between folding and non-folding areas becomes more perceptible
Solution Approach 1:
The patent implements a gradual transition of pixel sizes from the folding area to the non-folding area, with the pixel size ratio controlled between 0.95 and 1.05. This creates a subtle gradient that maintains resolution in the folding area while minimizing the visual boundary effect, thus resolving the contradiction between resolution and boundary perception.
Solution Approach 2:
The patent systematically adjusts the pixel size parameter across different display areas. By controlling the pixel size ratio between folding and non-folding areas within a specific range (0.95-1.05), the invention optimizes both resolution maintenance and boundary minimization, transforming a binary choice into a continuous parameter optimization.
3Manufacturing precision
If diffraction patterns are added to improve light emission and display quality, then resolution is enhanced, but the complexity of the window structure increases
Solution Approach 1:
The patent integrates diffraction patterns directly into the window structure, merging two previously separate components (window and diffraction elements) into a single integrated structure. This reduces the number of discrete parts and assembly steps while maintaining the light-diffraction function, thereby resolving the contradiction between display quality enhancement and structural 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
Improves display quality by minimizing moire effects and resolution degradation, while preventing users from perceiving boundaries between folding and non-folding areas, thus enhancing overall user experience.
Implementation Method 1
a plurality of diffraction patterns on the first pixels and spaced apart from each other
Implementation Method 2
a window on the first and second pixels and including a plurality of grooves repeatedly arranged along a first direction in the folding area. Each of the grooves includes a first groove formed from a first surface of the window toward a second surface of the window facing the first surface and a second groove formed from the second surface toward the first surface
Data Source
AI summary
A display device includes: a substrate including a folding area and a non-folding area adjacent to the folding area; a plurality of first pixels in the folding area and each having a first light emitting area; a plurality of second pixels in the non-folding area and each having a second light emitting area having a size that is different from a size of the first light emitting area; and a window on the first and second pixels and including a plurality of grooves repeatedly arranged along a first direction in the folding area, and wherein each of the grooves includes a first groove formed from a first surface of the window toward a second surface of the window facing the first surface and a second groove formed from the second surface toward the first surface, and the first groove and the second groove are alternately arranged.