Mid-frame Assembly with Sliding Mechanism for Bendable Display
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Solution Overview
Problem
Bendable display devices experience staggered layers between the flexible display panel and the mid-frame assembly when folded, leading to detachment due to mismatched bending paths.
Innovation Solution
A mid-frame assembly with a rotation shaft assembly, first and second mid-frame bodies, and slide mid-frames, equipped with drive assemblies that include linkage gears, racks, and serrated portions to adjust the size and compensate for slippage, ensuring the flexible panel remains fixed without a bezel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is fixed on the mid-frame assembly, then the display device can be folded, but staggered layers are caused between the display panel and the mid-frame assembly due to mismatched bending paths
Solution Approach 1:
The mid-frame assembly incorporates movable components including a movable mid-frame that can shift position and a drive assembly with rack and pinion mechanisms that can extend and retract. These dynamic elements allow the mid-frame assembly to adjust its bending path dynamically during folding, matching the display panel's bending characteristics and preventing staggered layers while maintaining folding capability
Solution Approach 2:
The patent changes the geometric parameters of the mid-frame assembly during folding operations. The movable mid-frame alters its position coordinates, and the drive assembly modifies its extension length based on the folding state. These parameter changes enable the mid-frame assembly to adapt its bending path to match the display panel, resolving the alignment issue while preserving foldability
2Ease of manufacture
If the mid-frame assembly uses a fixed structure, then the manufacturing is simpler, but the display panel detaches from the mid-frame assembly during folding
Solution Approach 1:
Rather than using a completely fixed structure, the patent implements a semi-fixed design where the main mid-frame body remains structurally simple and easy to manufacture, but incorporates movable sub-components (movable mid-frame and drive assembly) that activate during folding. This dynamic enhancement to the otherwise simple structure prevents detachment while maintaining ease of manufacture for the primary structure
Solution Approach 2:
The drive assembly acts as an intermediary mechanism between the fixed mid-frame body and the display panel. It mediates the interaction by providing adjustable mechanical coupling that adapts to folding movements, preventing detachment without requiring complete redesign of the entire structure, thus maintaining manufacturing simplicity while improving reliability
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
The mid-frame assembly effectively adjusts its size to match the flexible panel's bending, preventing staggered layers and allowing for bezel-less folding by compensating for slippage during inward and outward folding.
Implementation Method 1
a first linkage gear, wherein the first linkage gear is fixedly connected to and coaxial with the rotation shaft; a second linkage gear, disposed on a side of the first main mid-frame; a drive member, wherein the drive member is connected between the first linkage gear and the second linkage gear, and configured to drive the second linkage gear to rotate under rotation of the first linkage gear
Implementation Method 2
a first gear, wherein the first gear is coaxial with and fixedly connected to the second linkage gear; and a first rack, wherein the first rack is fixed to a side of the first slide mid-frame, and includes a first serrated portion configured to be engaged with the first gear
Data Source
AI summary
The present disclosure provides a mid-frame assembly. The mid-frame assembly includes: a rotation shaft assembly, a first mid-frame body, a first slide mid-frame, a second mid-frame body, and a second slide mid-frame. The first mid-frame body and the second mid-frame body are rotatably connected to two sides of the rotation shaft assembly; the first slide mid-frame is connected to a side, distal from the rotation shaft assembly, of the first mid-frame body and capable of moving relative to the first mid-frame body; and the second slide mid-frame is connected to a side, distal from the rotation shaft assembly, of the second mid-frame body and capable of moving relative to the second mid-frame body.