Rollable Display Cover Segmentation and Hinge Mechanism
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Solution Overview
Problem
Conventional rollable display devices face issues with shielding of the display area by covers, wrinkle formation, noise during opening and closing, and unstable operation due to the mechanical stress and movement of the display panel when rolled up or unrolled.
Innovation Solution
A rollable display device design incorporating a hinge structure in the top cover and a roller mechanism that allows the display panel to form a circular shape when wound, minimizing contact stress and noise, while a cover part is used to selectively expose the display area and guide stable opening and closing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cover part is used to protect the display panel, then protection is improved, but shielding of the display area occurs when fully unwound
Solution Approach 1:
The cover part is divided into multiple sections: a first cover that protects the display panel, a second cover connected to the roller, and a cover part connecting them. This segmentation allows the protective structure to be configured such that the display area is not shielded when fully unwound, while still providing protection when needed.
Solution Approach 2:
The cover structure is designed to be dynamic rather than static. The cover part can change its configuration between wound and unwound states, allowing it to provide protection when the display panel is wound while not shielding the display area when fully unwound.
2Volume of moving object
If the display panel is wound tightly, then compactness is improved, but wrinkles occur in the display panel
Solution Approach 1:
The roller is designed with a specific curvature radius that matches the minimum bending radius of the display panel. This curved design allows the display panel to be wound in a circular shape without creating sharp folds or wrinkles, maintaining surface quality while achieving compactness.
Solution Approach 2:
The design optimizes the curvature radius of the roller to prevent wrinkle formation. By changing the geometric parameter (radius of curvature) to match the display panel's minimum bending radius, the system achieves both compact winding and wrinkle-free surface quality.
3Ease of operation
If the top cover is made movable to expose display area, then ease of operation is improved, but noise is generated during opening and closing
Solution Approach 1:
A hinge structure is introduced as an intermediary element between the top cover and the display panel. This hinge enables smooth opening and closing motion while minimizing direct contact and friction, thereby reducing noise generation during operation.
Solution Approach 2:
The design replaces traditional mechanical connection methods with a hinge structure that reduces friction and contact noise. The hinge mechanism allows for smoother movement with less mechanical noise compared to rigid connections or sliding mechanisms.
4Reliability
If the top cover is made fixed for stability, then reliability is improved, but shielding of display area occurs
Solution Approach 1:
The cover structure is segmented into multiple functional parts: a fixed first cover for stability and protection, and a movable second cover connected via hinge that can be positioned to expose the display area. This segmentation allows different parts to fulfill different requirements simultaneously.
Solution Approach 2:
The design transitions from a completely fixed cover to a dynamic system where parts of the cover can move independently. The hinge-connected second cover can be opened or closed as needed, providing display area exposure while the first cover remains fixed to maintain structural stability.
Data Source
AI summary
A display device includes a display panel including a display area where images are displayed, a first cover configured to support a rear surface of the display panel, a roller configured to wind or unwind the display panel and the first cover, a second cover with a first end of the second cover fixed to the roller and a second opposite end of the second cover connected to an end of the first cover, and a cover assembly connecting the first cover and the second cover, wherein a boundary of the display area overlaps the cover assembly, and the cover assembly is configured to expose the display area.