Flexible Module Bending Area Film Removal
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Solution Overview
Problem
In flexible Active Matrix/Organic Light Emitting Diode (AMOLED) displays, stress issues between the flexible panel and the bottom film at the bending portion lead to incomplete bending or metal pad breakage, hindering the fabrication of a flexible module with a narrow frame.
Innovation Solution
A method involving the formation of a low surface energy layer on the bending area of the flexible panel, followed by attaching a bottom film with a specific adhesive glue, and then removing the adhesive and film from the bending area to allow balanced stress and complete bending, facilitating the fabrication of a flexible module with improved practicality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bottom film is attached to the entire back surface of the flexible panel, then the structural support is improved, but the bending completeness deteriorates due to stress concentration at the bending portion
Solution Approach 1:
The patent divides the bottom film attachment into two segments: the bending area where the bottom film is removed to allow stress-free bending, and the non-bending area where the bottom film is retained for structural support. This segmentation resolves the contradiction by providing support where needed while enabling complete bending where required.
Solution Approach 2:
The patent applies different treatments to different areas of the flexible panel: the bending area has no bottom film for flexibility, while the non-bending area has the bottom film for support. This local differentiation resolves the contradiction between overall structural support and localized bending completeness.
2Strength
If the bottom film is attached to the bending area, then the structural support is improved, but the metal pad integrity deteriorates due to stress-induced breakage
Solution Approach 1:
The patent segments the bottom film attachment to exclude the bending area, thereby preventing stress concentration on the metal pads located in this region. The metal pads remain in the bending area free from the bottom film's constraining stress, ensuring their integrity while the non-bending area retains structural support.
Solution Approach 2:
The patent applies the bottom film selectively to the non-bending area, creating a local quality difference that protects the metal pads in the bending area from stress-induced breakage while maintaining structural support in the non-bending area.
3Manufacturing precision
If the bottom film is completely removed from the bending area, then the bending completeness is improved, but the structural support deteriorates
Solution Approach 1:
The patent segments the bottom film attachment strategy: complete removal in the bending area for bending completeness, and retention in the non-bending area for structural support. This segmentation resolves the contradiction by distributing the functional requirements to different spatial zones.
Solution Approach 2:
The patent implements local quality by having the bottom film present in the non-bending area for support and absent in the bending area for flexibility, thereby simultaneously achieving both structural support and bending completeness through spatial differentiation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures balanced stress and complete bending of the flexible panel, preventing metal pad breakage and enabling easier folding of the COF end, thus achieving a better narrow frame design.
Implementation Method 1
forming a low surface energy layer on the back surface of the bending area of the flexible panel
Data Source
Figure 1~2
Figure 3
AI summary
The present disclosure discloses a flexible module and a method for fabricating the same. The method comprises: attaching a bottom film to a back surface of a flexible panel with an adhesive layer; at least removing the bottom film on the back surface of a bending area of the flexible panel; and then bending the flexible panel so that the bending area of the flexible panel bends to complete the fabrication of the flexible module. The fabricating method of the flexible module provided by the present disclosure at least removes the bottom film on the back surface of the bending area of the flexible panel and then bends the flexible panel, such that bending deformation of the bending area of the flexible panel takes place, the bending area of the flexible panel after bending shows balanced stress due to absence of the restriction of the bottom film at various positions, when the bending area of the flexible panel bends, the phenomenon of an incomplete bending caused by uneven stress or breaking of the metal pad of the bending area on the flexible panel will not happen, and the COF end of the flexible panel is more easily folded back completely, so that the narrow frame of a liquid crystal display device can be realized better.