Stretchable Display Fixing Units for Peeling Prevention
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Solution Overview
Problem
Stretchable display apparatuses face issues with peeling or cracking due to continuous stretching stress, as the film and encapsulation layer are prone to damage when stretched, folded, or bent.
Innovation Solution
Incorporating a fixing unit with alternating inorganic and organic layers, where holes in the inorganic layers are filled with organic material to enhance adhesion, dispersing stress and preventing peeling by connecting multiple encapsulation layers, thereby stabilizing the display apparatus during stretching, folding, or bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display apparatus is made stretchable to enable flexibility and adaptability, then the adaptability and ease of operation are improved, but the encapsulation layer and film are prone to peeling and cracking due to continuous stretching stress
Solution Approach 1:
The encapsulation layer is divided into multiple thin inorganic layers (e.g., SiO2, Si3N4) separated by organic buffer layers. This segmentation allows each inorganic layer to be thin enough to flex without cracking while the organic layers provide cushioning and adhesion, preventing peeling during stretching operations
Solution Approach 2:
The patent uses a composite structure combining inorganic encapsulation layers with organic buffer layers. The inorganic layers provide protective barriers while the organic layers provide flexibility and stress absorption. This composite approach maintains both protection and flexibility, preventing both cracking and peeling under stretching stress
2Reliability
If multiple inorganic and organic layers are deposited to improve adhesion and prevent peeling, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The encapsulation function is segmented into multiple thin inorganic layers rather than one thick layer. Each inorganic layer is deposited separately with precise thickness control (e.g., 50-200 nm per layer), and the organic buffer layers are deposited in between. This segmentation improves adhesion by creating multiple bonding interfaces while the systematic deposition process manages the complexity through standardized manufacturing steps
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
The solution effectively prevents peeling and cracking of the encapsulation layer by improving adhesion and dispersing stress across multiple layers, ensuring the display apparatus remains functional and durable under various mechanical stresses.
Implementation Method 1
holes in the inorganic layers are filled with organic material to enhance adhesion
Data Source
AI summary
A display apparatus according to the present disclosure comprises a display panel including a display area and a non-display area outside the display area, a plurality of fixing units disposed in the non-display area, and wherein the plurality of fixing units is disposed in at least one side of both sides in a stretching direction of the display panel.