Foldable Display Window Patterning to Minimize Moiré
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Solution Overview
Problem
The moiré phenomenon occurs in foldable display devices due to the interaction between the pixels of the panel and the patterns on the patterned glass, leading to deterioration of screen quality.
Innovation Solution
A display device with a window featuring groove patterns and filling resin patterns arranged in specific orientations and heights to reduce the moiré phenomenon, where the filling resin patterns have varying heights and alternating mountain and valley portions along the groove patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If patterned glass with zigzag patterns is used in foldable display devices, then shock resistance and flexibility are improved, but a moiré phenomenon occurs due to interaction between panel pixels and glass patterns
Solution Approach 1:
The patent applies asymmetry by designing the second pattern with a different pattern type or orientation compared to the first pattern. Specifically, while the first pattern consists of zigzag patterns extending in a first direction, the second pattern uses different zigzag patterns extending in a second direction that is different from the first direction. This asymmetric arrangement between the two patterns prevents the formation of regular interference patterns, thereby reducing the moiré phenomenon while maintaining the shock resistance and flexibility benefits of patterned glass in foldable display devices.
Solution Approach 2:
The patent introduces a second pattern layer that operates in a different dimensional orientation compared to the first pattern. The first pattern extends primarily in a first direction, while the second pattern extends in a second direction that is different from the first direction. This dimensional differentiation creates a multi-directional pattern structure that disrupts the periodic interference responsible for moiré effects, while both patterns collectively provide the desired shock resistance and flexibility characteristics.
2Adaptability or versatility
If patterned glass is used to provide flexibility, then the foldable display device can be bent, but screen quality deteriorates due to moiré phenomenon
Solution Approach 1:
The patent applies asymmetry by designing the second pattern with a different pattern type or orientation compared to the first pattern. Specifically, while the first pattern consists of zigzag patterns extending in a first direction, the second pattern uses different zigzag patterns extending in a second direction that is different from the first direction. This asymmetric arrangement between the two patterns prevents the formation of regular interference patterns, thereby reducing the moiré phenomenon while maintaining the shock resistance and flexibility benefits of patterned glass in foldable display devices.
Solution Approach 2:
The patent introduces a second pattern layer that operates in a different dimensional orientation compared to the first pattern. The first pattern extends primarily in a first direction, while the second pattern extends in a second direction that is different from the first direction. This dimensional differentiation creates a multi-directional pattern structure that disrupts the periodic interference responsible for moiré effects, while both patterns collectively provide the desired shock resistance and flexibility characteristics.
Data Source
AI summary
A display device includes a display panel including a folding area. A window is disposed on the display panel. The window includes a pattern portion disposed at a position overlapping the folding area. The window includes a first edge extending in a first direction. The pattern portion includes a plurality of groove patterns and a plurality of filling resin patterns disposed in the plurality of groove patterns. The plurality of filling resin patterns are arranged to be spaced apart from each other along the first direction. The plurality of groove patterns extends in a second direction crossing the first direction. Each of the plurality of filling resin patterns has varying heights along the second direction in which mountain portions and valley portions are alternately arranged along the second direction.