Shape Memory Alloy Protective Film for Rounded Display Corners
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Solution Overview
Problem
Existing protective films for display devices with round corners often fail to maintain the round shape of the display panel's corner area, leading to potential damage and aesthetic issues.
Innovation Solution
A protective film comprising a first layer with a middle area, side areas, and a corner area, where a second layer exposes portions of these areas and a third layer made of shape memory alloy is disposed on the first layer, providing a sectoral shape that maintains the roundness of the display panel's corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is disposed on one surface of a display panel to protect it, then the display panel is protected, but the corner area of the display panel cannot be maintained round
Solution Approach 1:
The protective film is divided into multiple layers (first layer, second layer, third layer) with each layer having specific functions. The first layer provides base protection, the second layer exposes corner areas, and the third layer maintains round shape at corners through shape memory alloy properties.
Solution Approach 2:
Different regions of the protective film have different structures and properties. The corner areas have exposed regions and shape memory alloy layers specifically designed to maintain roundness, while other areas provide general protection. This local differentiation allows the film to protect the display panel while maintaining the roundness of corner areas.
2Reliability
If the protective film covers the entire surface including corners, then protection is maximized, but the corner area cannot be maintained round
Solution Approach 1:
The second layer is designed to expose at least a portion of the corner areas, first side areas, and/or second side areas of the first layer. This extraction of coverage in specific regions allows the underlying structure to maintain its round shape while the rest of the surface remains protected.
Solution Approach 2:
The protective film has heterogeneous structure where different regions serve different purposes. Corner regions have exposed areas and shape memory alloy for maintaining roundness, while other regions provide full coverage protection. This local quality differentiation resolves the contradiction between comprehensive protection and shape maintenance.
3Shape
If a multi-layer structure is used to maintain corner roundness, then the roundness is maintained, but the device complexity increases
Solution Approach 1:
The protective film is segmented into three functional layers where each layer has a specific role. This segmentation allows the complex function of maintaining corner roundness while providing protection to be distributed across multiple simpler layers, making the overall system manageable despite its complexity.
Solution Approach 2:
The third layer uses shape memory alloy material that changes its shape based on temperature or other stimuli. This parameter-based control allows the layer to automatically maintain the roundness of corner areas without requiring complex mechanical structures or active control systems.
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 protective film effectively maintains the roundness of the display panel's corners, enhancing protection and aesthetics while allowing the display device to maintain a larger display area without increasing the non-display area.
Implementation Method 1
a third layer disposed on the exposed at least a portion of the at least one of the corner area, the first side area, and the second side area of the first layer, the third layer being a shape memory alloy
Data Source
AI summary
A protective film and a display device including the protective film are provided. The protective film includes: a first layer having a middle area, a first side area connected to a first edge of the middle area, a second side area connected to a second edge intersecting with the first edge of the middle area, and a corner area connecting the first side area to the second side area, a second layer disposed on the first layer and exposing at least a portion of at least one of the corner area, the first side area, and the second side area of the first layer, and a third layer disposed on the exposed at least a portion of the at least one of the corner area, the first side area, and the second side area of the first layer, the third layer being a shape memory alloy.