Foldable Screen Hinge Support for Flatness in Unfolded Displays
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Solution Overview
Problem
Existing electronic devices with single-screen displays face a trade-off between display area and portability, as increasing the display area often results in a larger device size, compromising portability.
Innovation Solution
A rotating shaft apparatus and foldable-screen device design that includes a rotating shaft apparatus with a back cover, lifting/lowering driving assembly, lifting/lowering plate, screen support assembly, and screen support door plate, which work together to provide stable support for a flexible display in both unfolded and folded states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a single screen is used to increase display area, then the display area is improved, but the device size becomes larger resulting in loss of portability
Solution Approach 1:
The display is divided into multiple flexible display screens that can be folded or unfolded relative to each other. The housing is segmented into multiple parts that can rotate around a rotating shaft, allowing the device to transition between compact folded states and expanded unfolded states with larger display area.
Solution Approach 2:
The device employs dynamic folding and unfolding mechanisms that allow the display area to change based on usage needs. The flexible display screens and housing segments can dynamically transition between different configurations, providing both compact portability and expanded display area as required.
2Area of moving object
If the flexible display is in the unfolded state with large display area, then the display area is improved, but the stability of support of the rotating shaft apparatus becomes poor affecting flatness
Solution Approach 1:
The lifting/lowering plate is designed to provide localized support at specific positions beneath the flexible display. The screen support door plate provides additional local support at the edge region. These localized support structures ensure that critical areas of the display maintain proper flatness and stability without requiring the entire structure to be rigid.
Solution Approach 2:
The lifting/lowering plate acts as an intermediary support element between the rotating shaft apparatus and the flexible display. It transfers and distributes support forces to maintain display flatness. The screen support door plate serves as another intermediary component that provides additional support and stabilization.
Data Source
AI summary
Embodiments of this application provide a rotating shaft apparatus and a foldable-screen device. The rotating shaft apparatus includes at least a back cover, a lifting/lowering driving assembly, a lifting/lowering plate, a screen support assembly, and a screen support door plate. The lifting/lowering driving assembly includes a transmission swing arm, a transmission shaft, and a lifting/lowering driving portion that are connected. The transmission shaft is rotatably connected to the back cover. The lifting/lowering plate is disposed corresponding to the back cover. The lifting/lowering driving portion is connected to the lifting/lowering plate. The transmission swing arm is slidably connected to the screen support assembly. At least one side of the lifting/lowering plate is disposed, in an axial direction of the transmission shaft, with the screen support door plate. The screen support door plate is rotatably connected to the screen support assembly and is slidably connected to the back cover.