Flexible Display Device with Chain Lock and Staggered Rollers
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Solution Overview
Problem
Conventional flexible display devices face excessive bending stress when rolled or folded, leading to issues like film separation and cracking, and occupy large spaces due to smaller curling radii or diameters.
Innovation Solution
A flexible display device design featuring a display module with a protective lid and metal supporting layer, an accommodating casing with multiple staggered rollers, and a chain lock system that allows the module to be divided into assemblies for rolling, using a resilient member and spiral spring to distribute stress and reduce the rolling radius.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flexible display is rolled up or folded to reduce occupied space, then the display can be stored in a smaller space, but excessive bending stress causes film separation and cracks
Solution Approach 1:
The flexible display device is divided into multiple segments including a display module, a resilient member, and a supporting structure. The resilient member is segmented into multiple sections that can independently deform, distributing the bending stress across different segments rather than concentrating it on the display panel alone. This segmentation allows the display to be rolled up into a compact form while maintaining reliability by preventing excessive stress on any single film layer.
2Volume of moving object
If a smaller curling radius or roller diameter is used to reduce storage space, then the occupied space is minimized, but the bending stress on the display panel becomes excessive
Solution Approach 1:
The resilient member is designed with specific material parameters including an elastic modulus within the range of 0.01-10 MPa and a thickness of 0.1-5 mm. These parameter changes allow the resilient member to provide sufficient support while enabling a smaller curling radius. The supporting structure includes reinforcement elements with specific geometric parameters that distribute bending stress, allowing the display to be rolled with a smaller radius without causing excessive stress on the display panel.
3Area of stationary object
If the flexible display panel is made larger to meet market demands for larger screens, then visual enjoyment is improved, but the disadvantages of carrying and storing become more significant
Solution Approach 1:
The flexible display device employs a dynamic rolling mechanism where the resilient member and supporting structure work together to enable the display panel to be rolled up into a compact form. The resilient member provides continuous elastic support during the rolling process, while the supporting structure includes movable components that facilitate smooth rolling and unrolling. This dynamic design allows a large-area display to be easily carried and stored by converting it between extended and compact states.
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
This design reduces stress on the display panel, prevents film separation and cracking, and minimizes the occupied space by allowing a larger display area to be rolled up in a smaller space with a multi-layer hybrid rolling mode, enhancing surface flatness and hardness.
Implementation Method 1
a resilient member, a first roller, and a second roller disposed in the hollow cavity, the resilient member fixed in the hollow cavity
Data Source
AI summary
The present invention provides a flexible display device including: a display module; an accommodating casing defined with a hollow cavity, an open channel defined in the accommodating casing, a chain lock disposed in the open channel, a resilient member, a first roller, and a second roller disposed in the hollow cavity, the resilient member forming a pre-pulling on the display module; the chain lock disassembling the display module into a first assembly and a second assembly to be rolled up on the first roller and the second roller respectively, and configured to combine the first assembly and the second assembly into the display module.