Under-Screen Support Chain for Flat Rollable Displays
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Solution Overview
Problem
Flexible display screens in current display apparatuses tend to warp and experience stress concentration when flattened in a sliding mode, due to the characteristics of film materials.
Innovation Solution
An under-screen supporting structure comprising a sliding middle frame, a rotating shaft, and a supporting chain with trapezoidal cross-sectioned supporting strips, which are in transmission connection with the display screen through a buffer layer, ensuring uniform unfolding and preventing warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display screen is flattened in a sliding mode, then the screen can be rolled and slid, but the upper and lower portions of the screen at the rotating shaft are prone to warping and stress concentration is generated
Solution Approach 1:
A supporting chain is introduced as an intermediary component between the rotating shaft and the display screen. The supporting chain includes multiple supporting strips that extend along the axis direction of the rotating shaft, providing continuous support to the screen during rolling and sliding operations. This intermediary structure prevents direct contact and stress concentration between the rotating shaft and the screen, thereby preventing warping while enabling rolling and sliding functionality.
Solution Approach 2:
The supporting strips are designed with a trapezoidal cross-section where one side (facing away from the rotating shaft) is greater than the other side (close to the rotating shaft). This parameter change in the geometric configuration of the supporting strips optimizes the distribution of support force, providing better stability to the display screen during rolling and sliding while preventing warping at the rotating shaft area.
2Stability of the object's composition
If a supporting structure is added to prevent warping, then screen stability is improved, but the device complexity increases
Solution Approach 1:
The supporting chain is segmented into multiple supporting strips arranged in sequence along the axis direction of the rotating shaft. Each supporting strip is an independent component with a trapezoidal cross-section. This segmentation allows the supporting function to be distributed across multiple simple components rather than requiring a single complex supporting structure, thereby improving screen stability while keeping individual components simple and manageable.
Data Source
AI summary
An under-screen support structure and a display device. The under-screen support structure is configured to support a rollable and slidable display screen (6) in the display device, and includes a sliding middle frame (1), a rotating shaft (2) and a support chain (3). The rotating shaft is mounted on the side of the sliding middle frame facing a rollable and slidable portion of the display screen, and the rotating shaft is transmittingly connected to the display screen by means of the support chain. The support chain includes a plurality of support strips, the extension direction of the support strips is parallel to the axis of the rotating shaft. The cross section of each support strip perpendicular to the axis of the rotating shaft is trapezoidal, and the size of the side facing away from the rotating shaft is greater than that of the side close to the rotating shaft.