Bearing Substrate for Flexible Display Separation
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Solution Overview
Problem
Current stripping methods for flexible display devices, such as mechanical and laser-based methods, often damage the flexible substrate and can affect the display elements, with non-uniform laser distribution causing additional issues.
Innovation Solution
A bearing substrate comprising a first sub-bearing substrate with through holes and a second sub-bearing substrate with corresponding protrusions, allowing for a seamless assembly and separation using a cleaning liquid through the holes, avoiding damage to the flexible substrate and display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mechanical stripping method is used, then the stripping process is simple, but the flexible substrate is prone to damage
Solution Approach 1:
The bearing substrate is divided into two separate sub-bearing substrates that can be independently handled. This segmentation allows the flexible substrate to be supported by one substrate during formation and then transferred to another during stripping, eliminating direct mechanical contact that causes damage while maintaining process simplicity
Solution Approach 2:
The second sub-bearing substrate acts as an intermediary carrier. The flexible substrate is formed on the first substrate, then transferred to the second substrate which serves as a temporary support during the stripping process. This intermediary prevents direct mechanical contact between the stripping tool and the flexible substrate, avoiding damage while maintaining ease of operation
2Manufacturing precision
If laser light method is used, then the stripping precision is improved, but the display elements may be affected and the flexible substrate may be damaged due to non-uniform laser distribution
Solution Approach 1:
The harmful laser light is completely removed from the stripping process. Instead of using laser to strip the adhesive layer, the patent uses a mechanical transfer method where the flexible substrate is physically moved from one substrate to another. This extraction of the harmful element (laser) eliminates the risk of damaging display elements or causing non-uniform heating while maintaining high stripping precision through controlled transfer
Solution Approach 2:
The second sub-bearing substrate serves as a mediator that receives the flexible substrate without requiring laser heating. The transfer process relies on physical manipulation and adhesion control rather than thermal energy, eliminating the harmful effects of non-uniform laser distribution while achieving precise stripping through controlled substrate transfer
3Device complexity
If a single bearing substrate is used, then the device structure is simple, but the bearing substrate cannot be reused and material waste increases
Solution Approach 1:
The bearing substrate is segmented into two reusable components (first and second sub-bearing substrates). Each substrate can be independently cleaned and reused for multiple fabrication cycles. The first substrate retains the flexible substrate after transfer, while the second substrate becomes the new support, enabling continuous reuse of both components and eliminating material waste
Solution Approach 2:
Instead of discarding the bearing substrate after single use, the patent implements a recovery system where both sub-bearing substrates are retained and reused. The flexible substrate is transferred from one to the other, and both substrates can be cleaned and reused for subsequent devices, transforming a single-use consumable into a reusable resource and eliminating material waste
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
Enables uniform and damage-free separation of the flexible substrate from the bearing substrate, reducing material waste and preserving the integrity of the display elements, while allowing for the reuse of the bearing substrate and minimizing chemical reactions.
Implementation Method 1
removing the adhesive layer by flowing a cleaning liquid through the through holes in the first sub-bearing substrate
Data Source
AI summary
Embodiments of the disclosure provide a bearing substrate and a fabrication method for a flexible display device, which relate to the field of display technology and may achieve a uniform separation between a flexible substrate and bearing substrate, and not cause damage to the flexible substrate and the display element. The bearing substrate comprises a first sub-bearing substrate and a second sub-bearing substrate. The first sub-bearing substrate has a plurality of through holes, and the second sub-bearing substrate has a plurality of protrusions that are in one-to-one correspondence with the protrusions. The protrusions and the through holes are configured such that the protrusions are capable of passing through the through holes when assembling the first sub-bearing substrate with the second sub-bearing substrate, so that the protrusions are flush with a surface of the first sub-bearing substrate and spliced together with the surface.