Flexible Display Panel Stretching Area Blocking Dam
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Solution Overview
Problem
Flexible display panels with stretchable properties face manufacturing challenges due to issues affecting their stretching performance during the manufacturing process.
Innovation Solution
A display panel design featuring a flexible substrate with a display layer that includes a stretching area containing pixel islands, through-holes, and an annular blocking dam surrounding light-emitting units, along with an encapsulation layer confined within the annular area by the blocking dam, ensuring the organic layer does not obstruct stretching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an encapsulation layer is provided to protect the display layer, then the reliability and protection of the display panel is improved, but the organic layer may enter through-holes and obstruct stretching, worsening the stretchability
Solution Approach 1:
The display layer is segmented into multiple pixel islands spaced apart with through-holes between them, allowing the encapsulation layer to be discontinuous in the stretching area while maintaining protection in non-stretching areas. This segmentation enables the display panel to stretch through the through-holes while retaining encapsulation protection where needed.
Solution Approach 2:
Different regions of the display panel have different properties: the stretching area contains through-holes and spaced pixel islands to enable stretching, while non-stretching areas have continuous encapsulation for protection. The encapsulation layer is selectively provided in different regions to match the functional requirements of each area.
2Adaptability or versatility
If the organic layer is confined within an annular area surrounded by the blocking dam, then the stretchability is maintained by preventing organic layer from entering through-holes, but the device complexity increases due to the additional blocking dam structure
Solution Approach 1:
The blocking dam acts as an intermediary structure between the pixel definition layer and the encapsulation layer. It prevents the organic layer from entering the through-holes while maintaining the stretching function, serving as a mediator that resolves the conflict between encapsulation and stretchability.
Solution Approach 2:
The blocking dam is formed as an annular structure that extends in the vertical dimension above the pixel definition layer. This three-dimensional structure effectively blocks the organic layer from entering through-holes in the horizontal plane, using vertical extension to solve a horizontal plane problem.
Data Source
AI summary
A display device, a display panel, and a manufacturing method therefor are provided. The display panel includes a flexible substrate, a display layer on one side of the flexible substrate, and an encapsulation layer covering a surface of the display layer away from the flexible substrate. The display layer has a stretching area provided with a plurality of pixel islands spaced apart and a through-hole. A blocking dam is in an area corresponding to the pixel island and surrounds a plurality of light-emitting units. The encapsulation layer includes an organic layer that is in the stretching area and confined within an annular area surrounded by the blocking dam.