Rollable Flexible Display Mechanism for Variable Screen Area
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Solution Overview
Problem
Existing flexible screens occupy a large area despite advancements in flexibility and durability, necessitating a solution to reduce their volume while maintaining functionality.
Innovation Solution
A display device with a housing unit, supporting structures, and a driving mechanism that allows the flexible display screen to adjust its size by sliding and rolling mechanisms, enabling it to switch between small and large screen modes without increasing volume, using a combination of gears, racks, and rollers to manage the screen's display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the flexible display screen is made larger to provide more display area, then the display area is improved, but the volume of the device increases
Solution Approach 1:
The flexible display screen transitions from a static fixed-size display to a dynamic adjustable-size display. The screen can be rolled up or extended along the longitudinal direction based on display needs, allowing the display area to change dynamically without permanently increasing device volume. This is achieved through a rolling mechanism that enables the screen to be compacted when not fully extended.
Solution Approach 2:
The flexible display screen is designed to roll up and nest within the device housing when not in full display mode. The screen can be partially or fully retracted into a compact state, similar to a nested doll structure, allowing large display area capability while maintaining small device volume when the full display area is not needed.
2Volume of moving object
If the flexible display screen is made foldable or rollable to reduce panel size, then the device volume is reduced, but the screen occupies a large area when deployed
Solution Approach 1:
The screen transitions from a static fixed-size display to a dynamic adjustable-size display. The screen can be rolled up or extended along the longitudinal direction based on display needs, allowing the display area to change dynamically without permanently increasing device volume. This is achieved through a rolling mechanism that enables the screen to be compacted when not fully extended.
3Area of moving object
If the flexible display screen is stretched to increase display area, then the display area is improved, but excessive pulling force may damage the screen
Solution Approach 1:
The mechanical properties of the flexible display screen are optimized by changing material parameters. The screen uses a flexible substrate with controlled tensile strength and elasticity that allows stretching to the required extent for area expansion while remaining within safe stress limits. The material parameters are selected to provide sufficient flexibility for area adjustment while maintaining durability and preventing damage from excessive pulling forces.
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
Prevents excessive pulling force on the screen, extends its lifespan, and allows for flexible display size adjustments without enlarging the device's volume, ensuring durability and versatility.
Implementation Method 1
At least one first gear is fixed to the first roller, and meshed with the first rack. When the display device displays with a large screen, the first rack drives the driven structure to rotate in a first direction through the first gear, so that the second housing moves in the direction away from the first housing.
Implementation Method 2
At least two first bearing sets which include two first bearings, the first bearings are arranged at two sides of the first gear, the first bearings are fixed to the first roller.
Implementation Method 3
A connecting wheel which is configured to connect the first driven wheel and the second driven wheel, and enables the first driven wheel and the second driven wheel to rotate synchronously.
Data Source
AI summary
The present application provides a display device which includes a housing unit, a first supporting structure, a second supporting structure, and a display device. The second supporting structure is slidably arranged opposite to the first supporting unit. A driving mechanism is connected to the second supporting structure. A flexible display screen is laid between a side of the first supporting structure and a side of the second supporting structure, a first end of the flexible display screen is connected to an end of the second supporting structure, and a second end of the flexible display screen is connected to the driving mechanism.