Flexible Display Substrate with Pre-compressed Elastic Layer for Crease Alleviation
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Solution Overview
Problem
Foldable display devices suffer from visible creases due to material deformation, and existing solutions that alleviate creases often require external mechanisms, occupying valuable space in the device design.
Innovation Solution
A flexible display substrate with an elastic layer in a compressed force storage state, attached to the display screen through a first adhesive layer, and a material layer with a lower elastic modulus than the adhesive layer, which applies tension to the screen upon unfolding, thereby alleviating creases without the need for external mechanisms and saving space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an external mechanism is used to stretch the screen module to alleviate creases, then the crease condition is improved, but the space of the entire machine is occupied
Solution Approach 1:
The patent extracts the crease-alleviation function from an external mechanism and integrates it into the display substrate itself through the elastic layer. The elastic layer is pre-compressed during manufacturing to store elastic strain energy, which automatically applies tensile force to the screen when folded, eliminating the need for external stretching mechanisms and saving device space.
Solution Approach 2:
The elastic layer is pre-compressed during the manufacturing process to store elastic strain energy before the product is put into use. This preliminary action ensures that when the display is folded, the pre-stored elastic energy automatically generates tensile force to counteract crease formation, without requiring external intervention during operation.
2Strength
If the elastic modulus of the material layer is greater than the adhesive layer, then the resilience transmission is improved, but the crease alleviation effect is reduced
Solution Approach 1:
The patent optimizes the elastic modulus parameters of different layers to achieve the desired balance. Specifically, the material layer is designed with an elastic modulus less than that of the adhesive layer, which allows the adhesive layer to effectively transmit the resilient force from the elastic layer to the screen, thereby maintaining both good resilience transmission and effective crease alleviation.
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 flexible display substrate effectively reduces creases in foldable screens by storing and releasing elastic strain energy, maintaining the screen in a tensile state and avoiding the use of external mechanisms, thus conserving space within the device.
Implementation Method 1
the elastic layer is in a compressed force storage state... the elastic layer has a tendency of stretching back, such that tension may be applied to an upper adjacent film layer and a lower adjacent film layer
Implementation Method 2
the elastic layer is connected to the flexible display screen through a first adhesive layer... resilience applied by the elastic layer to the first adhesive layer may be well transmitted to the flexible display screen
Data Source
AI summary
A flexible display substrate and a manufacturing method therefor, and a display device are disclosed. The flexible display substrate includes: a flexible display screen; an elastic layer which is located on one side of the flexible display screen, is connected to the flexible display screen by means of a first adhesive layer, and is in a compressed force storage state; and a material layer which is located on the side of the elastic layer away from the flexible display screen, and has an elastic modulus smaller than that of the first adhesive layer.