Flexible Display Back Cover Assembly for Noise Shielding and Gap Control
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Solution Overview
Problem
Noise generated by the driving assembly in flexible display devices during curvature changes impairs user satisfaction, and there is a risk of arm plate slippage and gaps forming between components, which can cause mechanical issues.
Innovation Solution
A cover is designed to shield noise from the driving assembly, a variable plate moves with the arm plate to minimize gaps, and a high-coupling force fixing assembly prevents slippage by using PEM nuts and SEMS screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driving assembly is coupled to the rear surface of the display panel to change curvature, then the display device can be bent like paper, but noise from motors or gears during driving impairs use satisfaction
Solution Approach 1:
The patent extracts the noise-generating driving assembly from the visible front area and relocates it to the rear surface of the display panel. By positioning the motor and gears behind the display, the harmful noise factor is separated from the user experience zone while maintaining the curvature-changing function.
Solution Approach 2:
The driving assembly is nested within the rear surface structure of the display panel, with the motor and transmission components integrated into the back housing. This nesting approach contains the noise-generating elements within a confined space that does not interfere with the front display area, effectively isolating the harmful noise factor.
2Adaptability or versatility
If the curvature of the flexible display device is changed through a driving assembly, then the display can be bent, but gaps may form between the back cover and arm plate during curvature changes
Solution Approach 1:
The patent employs dynamic adjustment mechanisms where the spacing between the back cover and arm plate is not fixed but can change in response to curvature variations. This dynamic design allows the structure to accommodate bending without creating harmful gaps, maintaining mechanical integrity throughout the range of motion.
Solution Approach 2:
The patent implements preliminary positioning features such as guide rails, positioning protrusions, or pre-loaded springs that prevent gap formation before it occurs. These features actively counteract the tendency for separation between components during curvature changes, ensuring continuous contact and reliable mechanical connection.
3Ease of operation
If the arm plate is fixed to the back cover, then the driving assembly can slide the arm plate to change curvature, but slippage may occur causing the end portion to escape off the back cover
Solution Approach 1:
The patent employs composite coupling structures combining multiple materials with different properties - such as metal arm plates with rubber friction surfaces, or plastic components with metal reinforcement ribs. This composite approach provides both the sliding capability needed for curvature adjustment and the friction/grip necessary to prevent slippage and maintain reliable coupling.
Solution Approach 2:
The patent incorporates preliminary anti-loosening features such as pre-installed friction-enhancing surfaces, deformation ribs, or locking mechanisms that are already in place before operation begins. These features proactively increase the coupling force between the arm plate and back cover, preventing slippage before it can occur during curvature adjustment operations.
Data Source
AI summary
Provided is a flexible display device including a back cover configured to support a rear surface of a display panel, a pair of arm plates disposed to face each other and having a portion of an end portion thereof fixed to the back cover, a driving assembly connected between the pair of arm plates, and configured to slide the arm plate in a length direction to change a curvature of the back cover and the display panel, and a cover part disposed on a rear surface of the back cover and configured to cover the driving assembly to shield noise generated from the driving assembly.