Foldable Display Panel Pixel Circuit Density and Bending Robustness
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Solution Overview
Problem
Foldable display devices face issues with display quality due to the structural limitations of pixel circuits and shift registers, which are not robust enough to withstand bending, leading to damage and degradation of the display effect, especially in small form factor devices like mobile phones and tablets.
Innovation Solution
A display panel design with a higher density of pixel circuit units in non-fold areas, specifically in first and second areas adjacent to and away from the fold area, respectively, where no pixel circuit units are present in the fold area, allowing for robust bending without damaging the pixel circuit units and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel circuit units are arranged in the fold area to achieve uniform display coverage, then the display effect is maintained, but the pixel circuit units are damaged during bending
Solution Approach 1:
The display panel is divided into a fold area and a non-fold area, with pixel circuit units exclusively arranged in the non-fold area. This segmentation allows the fold area to be free of rigid electronic components during bending, while the non-fold area maintains full display coverage and functionality.
Solution Approach 2:
The pixel circuit units are relocated from the two-dimensional plane of the fold area to the adjacent non-fold area, utilizing spatial redistribution. This dimensional relocation ensures that all pixel circuits are positioned in regions that experience minimal stress during folding, while still covering the entire display area through extended arrangement.
2Reliability
If pixel circuit units are arranged with uniform density across the display panel, then the manufacturing process is simplified, but the display effect is degraded in fold areas due to bending damage
Solution Approach 1:
The pixel circuit units are arranged with different distribution characteristics in different regions: they are exclusively positioned in the non-fold area where they can operate reliably during bending, while the fold area contains only light-emitting elements. This local differentiation optimizes both reliability and display quality without requiring complex uniform arrangements across the entire panel.
3Area of stationary object
If multiple small display screens are assembled into a large foldable panel, then the foldable display device is created, but the display effect around fold areas is degraded
Solution Approach 1:
Multiple small display screens are merged into a single large foldable panel with a continuous arrangement of pixel circuit units in the non-fold area. This unified structure eliminates the boundaries and mismatch issues that would arise from assembling separate screens, while the strategic placement of pixel circuits away from fold areas ensures consistent display quality across the entire large panel.
Data Source
AI summary
The invention discloses a display panel and a display device. The display panel including a fold area, and at least one non-fold area proximate to the fold area, the display panel includes: an underlying substrate, a plurality of light-emitting elements, and a plurality of pixel circuit units arranged on the underlying substrate, which are arranged in the non-fold area; and the non-fold area includes at least one first area and second area; and there are a plurality of the pixel circuit units arrayed respectively in the first area and the second area, the first area is adjacent to the fold area, the second area is located on the side of the first area away from the fold area, and the distribution density of the pixel circuit units in the first area is higher than or equal to the distribution density of the pixel circuit units in the second area.