Rollable Display Support Bars and Hinges for Stress Distribution
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Solution Overview
Problem
Rollable display devices face challenges in maintaining surface quality and reliability due to stress generated during rolling, which can damage components and deteriorate the display module's surface quality, especially with existing support structures.
Innovation Solution
A rollable display device design featuring a support module with rotating support bars and hinges, a resin layer between the support and display modules, and a method of manufacturing that includes a resin layer formation process to enhance surface quality and reliability by distributing stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional support structure is used to hold the display module, then the display module can be supported, but stress generated during rolling damages the components and deteriorates surface quality
Solution Approach 1:
The support structure is divided into multiple support bars arranged in parallel, with hinges connecting adjacent bars. This segmentation allows each bar to independently manage stress in its region, distributing the rolling stress across multiple discrete elements rather than concentrating it in a single rigid support structure, thereby preventing damage to the display module components.
Solution Approach 2:
The support bars are designed to be rotatable relative to each other through the hinge joints, transforming the rigid support structure into a dynamic one. During rolling, the support bars can rotate and adjust their orientation to accommodate the changing stress distribution, allowing the structure to adapt to rolling forces without transmitting harmful stresses to the display module.
2Manufacturing precision
If a rigid support structure is used to maintain display module position, then positioning is stable, but surface quality deteriorates due to stress concentration
Solution Approach 1:
The support structure transitions from a rigid state to a flexible state by introducing rotational degrees of freedom through hinges. This parameter change in the structural rigidity allows the support system to maintain positioning stability during normal conditions while accommodating stress during rolling without concentrating forces that would deteriorate surface quality.
3Manufacturing precision
If support bars are densely arranged to provide uniform support, then surface quality is maintained, but device complexity increases
Solution Approach 1:
The support structure uses a segmented arrangement of discrete support bars with hinges between them, rather than a continuous rigid frame. This segmentation provides uniform support across the display module while keeping each individual component simple and the overall assembly manageable, avoiding the complexity of a fully continuous support structure.
Data Source
AI summary
A rollable display device including: a support module; a display module disposed on the support module and including a display area and a non-display area adjacent to the display area; and a resin layer disposed between the support module and the display module, the display module including a display panel including a plurality of pixels, the support module including: a plurality of support bars extending in a first direction and arranged in a second direction crossing the first direction, wherein the support bars are spaced apart from each other; and a plurality of hinges disposed between the support bars and coupled with the support bars disposed adjacent thereto, and wherein each of the support bars is rotatably coupled with the hinges with respect to a driving axis extending in the first direction and the driving axis penetrates the display panel when viewed in a cross-section.