Flexible Display Subpixel Pitch Optimization for Bending Deformation
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Solution Overview
Problem
Conventional flexible AMOLED displays experience deformation issues when bent, leading to a poor user experience due to the varying distance between subpixels, which affects the display content in the bending section.
Innovation Solution
A flexible curved display design featuring a flexible glass portion and a display panel with a flat section and a bending section, where the pixels project along a specific direction to maintain equal distances between adjacent projection points across both sections, ensuring all light-emitting directions are parallel and consistent, thus preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is bent to achieve flexibility, then the display can be folded and adapted to different shapes, but the horizontal distance between pixels in the bending section becomes shorter causing display content deformation
Solution Approach 1:
The patent applies different pixel pitch values in different regions of the display panel. Specifically, the first pixel pitch is used in the first region and a second pixel pitch different from the first is used in the second region. This local differentiation allows the display to maintain proper pixel spacing and prevent content deformation in each region while enabling overall flexibility of the display panel.
Solution Approach 2:
The patent transitions from a uniform two-dimensional pixel arrangement to a three-dimensional spatial arrangement where pixel positions are optimized in different regions. By considering the folded state and adjusting pixel pitches across different regions, the solution adds a dimensional aspect to pixel positioning that accounts for the curvature and folding geometry, thereby preventing distortion.
2Volume of moving object
If the pixel distance is reduced in the bending section to maintain compactness, then the display can be folded smaller, but the display content becomes compressed and deformed
Solution Approach 1:
The patent implements region-specific pixel pitch optimization where the first region has a first pixel pitch and the second region has a second pixel pitch. This allows compact folding in certain areas while maintaining adequate pixel spacing in other areas to prevent content compression and deformation, thus achieving both compactness and display quality.
3Ease of manufacture
If uniform pixel spacing is maintained across the entire display panel, then the manufacturing process is simpler, but the display deforms when bent
Solution Approach 1:
The patent divides the display panel into multiple regions with different pixel pitch characteristics. The first region uses a first pixel pitch while the second region uses a second pixel pitch. This localized differentiation maintains geometric stability and prevents deformation in each region while still being manufacturable through established pixel arrangement techniques adapted to regional requirements.
Data Source
AI summary
A flexible curved display comprises a flexible glass portion and a flexible display panel connected to the flexible glass portion. The flexible display panel comprises a flat section and a bending section, the flat section and the bending section projecting along a same projection direction to respectively define a first projection area and a second projection area on a same projection plane; a plurality of pixels on the flexible display panel projecting along the projection direction to define plural projection points on the projection plane, the projection points satisfying a predetermined condition, and the predetermined condition comprising same distance between adjacent projection points along a same reference direction. The distance between the subpixels of the bending section is the same as the distance between the subpixels of the flat section. Thus, it can solve deformation issues and improve display performance.