Flexible Display Screen Stretch Resistant Layer Mechanism
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Solution Overview
Problem
Conventional flexible display devices suffer from damage when curling due to excessive pressure from a small reel radius, which limits the flexible display screen's lifespan.
Innovation Solution
A flexible display device design featuring a casing with an accommodating chamber, a stretching member, a roller assembly, a stretch resistant layer, and a counterweight assembly, where the flexible display screen is mounted on the stretch resistant layer, allowing it to be pulled out or retracted without direct contact with the rollers, thereby reducing pressure and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the reel radius is made small to reduce device size, then the flexible display device becomes more compact, but the flexible display screen is subjected to great pressure and easily damaged during curling
Solution Approach 1:
The patent introduces a stretch resistant layer as an intermediary component between the flexible display screen and the reel. This layer has high tensile strength and resists stretching, allowing the screen to be curled around a small radius reel without the screen itself experiencing damaging stresses. The stretch resistant layer absorbs the mechanical stress during curling and uncurling operations.
Solution Approach 2:
The patent employs a thin film structure consisting of the stretch resistant layer that conforms to the curved surface of the reel while protecting the flexible display screen. This thin film allows the screen to maintain its integrity during curling by providing a protective barrier that distributes mechanical stresses.
2Reliability
If the reel radius is increased to reduce pressure on the screen, then screen durability is improved, but the device occupies more space and becomes less compact
Solution Approach 1:
The stretch resistant layer serves as a mediator that enables the system to achieve both small reel radius and screen protection simultaneously. By placing this specialized layer between the screen and the reel, the system can use a compact small-radius reel while the stretch resistant layer absorbs the mechanical stresses, preventing screen damage.
3Device complexity
If the flexible display screen is directly contacted with the roller assembly during curling, then the structure is simplified, but the screen is easily forced and damaged
Solution Approach 1:
The stretch resistant layer acts as an intermediary between the roller assembly and the flexible display screen. During curling operations, the roller assembly contacts and curls the stretch resistant layer, which in turn curls the screen without the rollers directly contacting the screen. This protects the screen from direct mechanical forcing while adding only one additional layer to the structure.
4Reliability
If the stretch resistant layer is made thicker to increase resistance, then screen protection is improved, but the device complexity and material usage increase
Solution Approach 1:
The patent employs a thin film approach where the stretch resistant layer provides adequate protection at minimal thickness. The stretch resistant layer is configured as a thin conformal coating that provides the necessary mechanical strength and stretch resistance without adding significant bulk or complexity to the device structure.
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 design mitigates the risk of damage to the flexible display screen during curling, prolongs its lifespan, and allows for a more compact and aesthetically pleasing installation by reducing the occupied space and improving the screen's flatness.
Implementation Method 1
a stretch resistant layer, a first end of the stretch resistant layer connected to the stretching member
Implementation Method 2
a counterweight assembly connected to the second end of the stretch resistant layer
Data Source
AI summary
The present invention provides a flexible display device, including a casing, a stretching member, a roller assembly, a stretch resistant layer, a disposing member, and a flexible display screen. The stretching member and the roller assembly are disposed in an accommodating chamber in the casing and do not contact with each other. A first end of the stretch resistant layer is connected to the stretching member, and a second end thereof is wrapped around the roller assembly, extends out of the casing, and is connected to a counterweight assembly. The flexible display screen is disposed on the stretch resistant layer. The present invention mitigates a phenomenon of rupture of the flexible display screen when curling and forced.