Elasticity-Adjusting Layer for Flexible Display Neutral Plane Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display apparatuses face performance degradation due to excessive bending, which damages components like thin film transistors and conductive wirings, as they lack sufficient durability against repeated bending strains.
Innovation Solution
Incorporating an elasticity-adjusting layer with a lower elastic modulus than the display module, positioned to adjust the neutral plane in bending, thereby minimizing strain and absorbing shock, which can be composed of materials like silicone-group or acryl-group resins and having a thickness of one to three times that of the display module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display apparatuses are bent repeatedly or excessively, then portability and flexibility are improved, but components such as thin film transistors and conductive wirings are damaged leading to decreased performance
Solution Approach 1:
An elasticity-adjusting layer is introduced as an intermediary component between the display module and the external environment. This layer has a lower elastic modulus than the display module, allowing it to deform more easily and absorb bending stress, thereby protecting the fragile internal components from damage during repeated bending operations
Solution Approach 2:
The elastic modulus of the elasticity-adjusting layer is specifically designed to be lower than that of the display module. This parameter change allows the layer to serve as a buffer that undergoes greater deformation, reducing the stress transmitted to the display module components during bending operations
2Reliability
If the elasticity-adjusting layer has a lower elastic modulus than the display module, then strain is minimized and durability is improved, but the neutral plane position must be precisely controlled
Solution Approach 1:
The elasticity-adjusting layer is positioned specifically at locations where bending stress is most critical. By locally adding this layer with different elastic properties, the neutral plane is shifted to positions that minimize strain on the display module components, achieving improved durability through targeted structural modification
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 increases the durability of the display apparatus against bending by positioning the neutral plane within or adjacent to the display module, reducing strain and preventing damage to internal components, thus enhancing the apparatus' reliability and portability.
Implementation Method 1
an elasticity-adjusting layer disposed on or below the display module to adjust a position of a neutral plane in bending of the display apparatus. An elastic modulus of the elasticity-adjusting layer is less than that of at least one of the display module, the lower module, and the upper module, so as to position the neutral plane within or proximate to the display module
Data Source
AI summary
Disclosed is a display apparatus. The display apparatus includes: a display module including a flexible substrate, a display panel, and an encapsulation film; a lower module disposed below the display module; an upper module disposed on the display module; and an elasticity-adjusting layer disposed on or below the display module to adjust a position of a neutral plane in bending of the display apparatus, wherein an elastic modulus of the elasticity-adjusting layer is less than that of at least one of the display module, the lower module, or the upper module, so as to position the neutral plane within or proximate to the display module.