Flexible Display Panel Adhesiveless Bent Region
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Solution Overview
Problem
During the manufacturing of flexible display panels, incomplete removal of the flexible film in bent regions leads to adhesive squeezing, causing wrinkles and increasing the risk of circuit breakage and poor display quality due to adhesive fluidity.
Innovation Solution
A method involving a flexible film with distinct adhesive and adhesiveless regions, where the adhesiveless region corresponds to the bent region, allowing for partial removal of the flexible film to prevent adhesive squeezing and wrinkles, thereby enhancing bending reliability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the flexible film is not removed completely in the bent region, then the flexible display substrate can be supported, but adhesive squeezing occurs causing wrinkles and circuit breakage risk
Solution Approach 1:
The flexible film is divided into a first region (bent region) and a second region (non-bent region), where the first region is removed and the second region is retained to provide support. This segmentation allows the film to both support the substrate and avoid causing wrinkles during bending.
Solution Approach 2:
The first region of the flexible film corresponding to the bent region is completely removed from the substrate. This extraction eliminates the source of the problem (adhesive squeezing) while preserving the support function in the non-bent region.
2Strength
If adhesive is applied on the flexible film, then the flexible display substrate can be attached, but adhesive fluidity causes wrinkles at step places during bending
Solution Approach 1:
The adhesive region is designed to be spatially separated from the bent region. The adhesive is applied only on the second region (non-bent region) of the flexible film, while the first region (bent region) is kept adhesive-free. This local quality differentiation prevents adhesive squeezing and wrinkle formation during bending while maintaining attachment strength in the non-bent region.
3Device complexity
If the flexible film thickness is changed to create step places, then the flexible display panel can be structured, but adhesive squeezing at step places increases breakage risk
Solution Approach 1:
The first region of the flexible film is completely removed, eliminating the step place structure that causes adhesive squeezing. This extraction simplifies the film structure in the bent region while improving reliability by preventing circuit breakage.
Data Source
AI summary
A flexible display panel, a method of manufacturing the flexible display panel and a display device are provided. The method of manufacturing the flexible display panel includes: providing a flexible film, wherein the flexible film includes a first region and a second region other than the first region; forming an adhesive on the second region of the flexible film; attaching a flexible display substrate to the flexible film by using the adhesive; cutting the flexible film to remove at least a portion of the first region of the flexible film, wherein the flexible film is configured to support the flexible display substrate.