Foldable Window Groove Structure for Moire and Light Uniformity
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Solution Overview
Problem
Flexible electronic devices require a window that maintains folding characteristics and display quality without disrupting folding operations and minimizing light non-uniformity and moire phenomena.
Innovation Solution
A window design featuring grooves with quadrangular or truncated rectangular pyramid shapes on the top and bottom surfaces, filled by a pattern portion, and non-folding portions to manage light distribution and reduce moire effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a window is designed with a folding portion to maintain folding characteristics, then the window can accommodate folding operations, but light non-uniformity and moire phenomena occur due to the arrangement of emission areas and overlapping of folding patterns
Solution Approach 1:
The window is divided into a folding portion and non-folding portions, with the folding portion further segmented into multiple emission areas arranged in a specific pattern. This segmentation allows the window to accommodate folding operations while controlling light distribution to reduce non-uniformity and moire phenomena.
Solution Approach 2:
Different portions of the window have different structural characteristics: the folding portion contains patterned emission areas with specific arrangements to control light, while the non-folding portions have different thicknesses to maintain structural integrity. This local differentiation optimizes both folding performance and light uniformity.
2Adaptability or versatility
If the folding portion width is increased to improve folding characteristics, then the window can better accommodate folding operations, but the non-uniformity in light quantity increases
Solution Approach 1:
The emission areas in the folding portion are arranged asymmetrically with different patterns and densities. Some areas have higher emission density while others have lower density, creating a non-uniform pattern that compensates for the light non-uniformity caused by the folding structure itself.
Solution Approach 2:
The optical parameters of the emission areas are adjusted by changing their arrangement patterns, densities, and geometric configurations. By varying these parameters across different regions of the folding portion, the overall light uniformity is optimized despite the presence of the folding structure.
3Strength
If the thickness of non-folding portions is increased to improve structural strength, then the window can better support folding operations, but the device complexity increases
Solution Approach 1:
The window structure is designed with dynamic thickness variation: non-folding portions have greater thickness to provide structural support, while the folding portion has reduced thickness to enable flexible folding operations. This dynamic differentiation of structural properties optimizes both strength and flexibility.
Solution Approach 2:
The structural complexity is managed by transitioning from a two-dimensional uniform thickness design to a three-dimensional variable thickness design. The thickness varies across different spatial dimensions, allowing the window to have both strong non-folding portions and flexible folding portions within a single integrated structure.
Data Source
AI summary
A window includes: a folding portion including a pattern portion which defines a plurality of grooves recessed from each a top surface and a bottom surface, and a filling part which fills the grooves; a first non-folding portion disposed at one side of the folding portion; and a second non-folding portion disposed apart from the first non-folding portion with the folding portion therebetween in a first direction, and each of the grooves has a rectangular pyramid shape or a truncated rectangular pyramid shape.