Guide Film Layout for Stabilizing Curved Display Bending Areas
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Solution Overview
Problem
The challenge in fabricating curved display devices is the movement of the bending area during the manufacturing process, which can lead to inaccuracies and defects.
Innovation Solution
A guide film with specific film portions and ultraviolet absorption patterns is used to stabilize the bending area of a curved display panel, employing ultraviolet-curable and -incurable adhesives to secure the panel during fabrication, followed by UV curing and removal processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the bending area is left free during fabrication, then the fabrication process is simpler and faster, but the bending area moves causing inaccuracies and defects
Solution Approach 1:
A guide film is introduced as an intermediary element between the bending area and the fabrication environment. The guide film includes a main film portion overlapping the bending area and multiple film portions extending to edge areas, which are attached to edge portions of the display panel. This intermediary structure prevents movement of the bending area during fabrication while maintaining processability.
Solution Approach 2:
The guide film is segmented into multiple functional portions: a main film portion overlapping the bending area and multiple film portions (first through fourth film portions) extending to different edge areas. This segmentation allows different regions of the guide film to serve different purposes - the main film portion stabilizes the bending area while the edge film portions provide attachment points for securing the guide film to the panel.
2Reliability
If the guide film is secured with strong adhesion throughout, then movement is completely prevented, but removal of the guide film becomes difficult and may damage the panel
Solution Approach 1:
The adhesive properties of the guide film are made non-uniform through local quality differentiation. The first adhesive layer has a first adhesive strength in regions where the guide film needs to be securely attached (edge areas), while the second adhesive layer has a second adhesive strength in regions where easy removal is needed (bending area). This allows the guide film to be reliably secured during fabrication at critical locations while enabling easy removal from the bending area afterward.
Solution Approach 2:
The adhesive strength parameter is changed across different regions of the guide film. By using adhesives with different adhesive strengths or varying the adhesive properties in different zones, the guide film achieves both strong attachment where needed and easy removal where not needed, resolving the contradiction between stability and ease of removal.
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 method effectively prevents movement of the bending area, ensuring precise fabrication of curved display devices with minimized defects and improved accuracy.
Implementation Method 1
employing ultraviolet-curable and -incurable adhesives to secure the panel during fabrication, followed by UV curing and removal processes
Implementation Method 2
a first ultraviolet absorption pattern which is attached to the fourth film portion
Data Source
AI summary
A method of fabricating a display device includes preparing a display panel including a main display area, a first edge area, a second edge area, a third edge area, a fourth edge area, a driving chip, and a printed circuit film; and disposing the display panel on a guide film, which is provided on a shaping pad. The guide film includes a main film portion which overlaps with the main display area, a first film portion, a second film portion, a third film portion, a fourth film portion, and a first ultraviolet absorption pattern which is attached to the fourth film portion.