Flexible Display Hinge Coupling to Prevent Stress Concentration
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Solution Overview
Problem
Existing flexible/rollable displays face issues with local excessive stress and curvature at a too small radius during movement between closed and open positions, leading to potential damage and reduced lifetime.
Innovation Solution
A display system with a movement synchronizing coupling mechanism that ensures synchronized rotation of main display supports at equal but oppositely directed angles, using components like cams, levers, gears, or springs to prevent excessive stress and curvature, and includes additional supports for stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a double hinge mechanism is used to reduce the width of the display system in closed position, then the device width is reduced, but the synchronized rotation of display supports is compromised leading to excessive local stress and small radius curvature
Solution Approach 1:
A coupling mechanism is introduced as an intermediary component between the two hinges to ensure synchronized rotation of the display supports. This coupling mechanism coordinates the rotational movement, preventing excessive local stress and small radius curvature while maintaining the compact closed position width achieved by the double hinge structure.
2Adaptability or versatility
If the display supports are made rotatable between closed and open positions, then the display versatility is improved, but excessive local stress and small radius curvature occur during movement
Solution Approach 1:
The coupling mechanism acts as a mediator that enables the rotatable functionality between closed and open positions while simultaneously preventing excessive local stress and small radius curvature. It coordinates the rotational movement to ensure both supports move synchronously, maintaining display integrity throughout the movement range.
Solution Approach 2:
The system employs dynamic movement where the coupling mechanism adjusts the rotational synchronization during the transition between positions. This dynamic coordination ensures that the display supports rotate at equal angles, preventing stress concentration and curvature issues while maintaining position flexibility.
Data Source
AI summary
A display system includes a continuous flexible display, two book halves, two main display supports, and a movement synchronizing coupling. The two book halves are connected to each other via a hinge mechanism. The hinge mechanism has two hinges, and each hinge is rotatable about respective axis. Each of the two main display supports connects to one of the two book halves and is configured to support the flexible display. The coupling is connected to the two main display supports and rotating about a rotation axis that is parallel to the axis of hinge to enable a synchronized movement of the two main display supports.