Flexible OLED Display Cover Plate Curved Edge Design
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Solution Overview
Problem
Current technologies face challenges in achieving high yield and high reliability for bending, folding, and edge bending of flexible OLED displays due to material and process limitations.
Innovation Solution
A display device design featuring a cover plate with specific curved surface parts and a display panel that matches the cover plate's shape, including middle, edge, and corner curved surfaces, allowing for a narrow bezel design and improved screen occupation ratio through a manufacturing method involving a mold and a flexible carrier film for pre-deformation and extrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible OLED display is designed with bending, folding, or edge bending capabilities, then the display can achieve novel shapes and meet consumer requirements for flexibility, but the yield and reliability are reduced due to material and process limitations
Solution Approach 1:
The cover plate is segmented into multiple functional zones: a middle plane part for the main display area, edge curved surface parts for gradual curvature transition, and corner curved surface parts for corner rounding. This segmentation allows each zone to be optimized independently, with the display panel only needing to conform to the middle plane part where high yield and reliability are maintained.
Solution Approach 2:
The cover plate is pre-formed with curved surfaces and rounded corners before the display panel is installed. This preliminary shaping of the cover plate eliminates the need to bend or deform the display panel itself, thereby maintaining high yield and reliability while still achieving the desired flexible appearance and novel shapes.
2Area of stationary object
If the display panel is made to match the cover plate's curved shape, then the screen occupation ratio is improved and bezel width is reduced, but the manufacturing complexity increases
Solution Approach 1:
Instead of making the display panel conform to a curved cover plate (which would increase complexity), the invention inverts the approach: the cover plate is given the curved shape with rounded corners, while the display panel remains flat and only needs to match the middle plane part. This inversion maintains high screen occupation ratio visually while simplifying manufacturing.
Solution Approach 2:
The cover plate exhibits different geometric qualities in different zones: a flat middle plane part for optimal display contact, curved edge zones for aesthetic narrowing of the bezel, and rounded corner zones for novel shapes. The display panel only needs to precisely match the local quality of the middle plane part, while the curved and rounded zones provide visual enhancement without adding manufacturing complexity.
3Shape
If the edge curved surface parts have different widths with a ratio between 0.65 and 0.85, then the aesthetic appearance and screen occupation ratio are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention optimizes the width ratio parameter of edge curved surface parts to be between 0.65 and 0.85, which achieves optimal aesthetic appearance and screen occupation ratio. By setting this specific parameter range, the design balances visual appeal with manufacturability, avoiding excessively tight tolerance requirements while still achieving the desired proportional relationships between different edge zones.
Data Source
AI summary
There is provided a display device including a cover plate and a display panel; the cover plate includes a middle plane part, a first edge curved surface part, a second edge covered surface part and a corner curved surface part; the display panel includes a middle part, an edge part and a corner part; the middle part is arranged corresponding to the middle plane part; the edge part includes a first edge part and a second edge part; the first edge part and the first edge curved surface part are arranged correspondingly, and the second edge part and the second edge curved surface part are arranged correspondingly; the corner part and the corner curved surface part are correspondingly arranged; the middle part is in a display area; at least a portion of the edge part and the corner part adjacent to the middle part is in the display area.