Stretchable Display Auxiliary Pattern for Precise Film Transfer
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Solution Overview
Problem
The over-transfer of anisotropic conductive film during the manufacturing process of stretchable display devices leads to cracks and increased costs due to the sagging of the film edges at the step difference between rigid and soft portions, affecting the stability and quality of the device.
Innovation Solution
A stretchable display device design with auxiliary patterns in the soft portions that match the size of the transfer film, ensuring proper alignment and preventing over-transfer, while maintaining the height difference between rigid and soft portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the transfer film is applied to transfer the anisotropic conductive film to rigid portions, then the light-emitting element can be electrically connected, but the edge of the transfer film sags downward due to the step difference between rigid and soft portions, causing over-transfer on soft portions
Solution Approach 1:
The patent applies a preliminary action by forming a protective film on the soft portion before the transfer process. This protective film prevents the anisotropic conductive film from being over-transferred to the soft portion during the transfer process, thereby preventing cracks and maintaining device stability.
Solution Approach 2:
The protective film acts as an intermediary layer between the anisotropic conductive film and the soft portion. It prevents direct contact and adhesion of the anisotropic conductive film to the soft portion, thereby preventing over-transfer and subsequent cracking during stretching.
2Productivity
If the anisotropic conductive film is over-transferred on soft portions, then manufacturing area is covered, but cracks occur during stretching, lowering device stability
Solution Approach 1:
The protective film is formed in advance on the soft portion to prevent over-transfer of the anisotropic conductive film during the transfer process, thereby preventing cracks and maintaining device reliability.
Solution Approach 2:
The patent converts the potential harm of over-transfer into a benefit by using the protective film to define precise transfer boundaries. The protective film's presence ensures that the anisotropic conductive film is transferred only to the intended rigid portions, improving both precision and reliability.
3Quantity of substance
If the anisotropic conductive film is over-transferred on soft portions, then more area is covered, but manufacturing costs increase due to material waste
Solution Approach 1:
The protective film is formed before the transfer process to prevent over-transfer of the anisotropic conductive film to the soft portion, thereby reducing material waste and lowering manufacturing costs.
Solution Approach 2:
The patent extracts or removes the unwanted over-transferred material from the soft portion by preventing its adhesion through the protective film. This ensures that the anisotropic conductive film is applied only where needed, reducing material waste and costs.
Data Source
AI summary
The present disclosure relates to a stretchable display device. A stretchable display device includes a plurality of rigid portions spaced apart from each other in a first direction and a second direction; a plurality of soft portions each provided between adjacent rigid portions in the first direction or the second direction; a plurality of auxiliary soft portions each provided between adjacent soft portions in the first direction or the second direction; and an auxiliary pattern selectively provided in the plurality of auxiliary soft portions, wherein a height of the auxiliary pattern is equal to or greater than a height of the soft portion and is smaller than or equal to a height of the rigid portion.