Four-Link Hinge for Synchronous Folding of Flexible Displays
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Solution Overview
Problem
Current foldable electronic devices lack bilateral synchronous rotation in their hinges, leading to reduced service life due to uneven rotational speeds and poor bending resistance, resulting in irreversible creases and deterioration of the flexible display panel's flatness and display effect.
Innovation Solution
A hinge design with multiple transmission members and rotating mechanisms connected to a fixing bracket, ensuring synchronized rotation by aligning rotational axes and using connecting links and sliding grooves to maintain consistent movement, thereby supporting the flexible display panel effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two rotating mechanisms are disposed oppositely in a hinge to achieve folding and unfolding, then the electronic device can be folded or curled to reduce size and improve portability, but the rotational speeds of the two rotating mechanisms may not be kept same, causing the flexible display panel to be pressed or pulled and reducing service life
Solution Approach 1:
The patent introduces an asymmetric transmission mechanism where one rotating mechanism is directly connected to the rotating member while the other is connected through a transmission component (such as a gear or belt). This asymmetric connection ensures that both rotating mechanisms rotate at the same speed by mechanically coupling them through different transmission paths, thereby preventing the flexible display panel from being pressed or pulled during folding and unfolding operations.
2Volume of moving object
If a compact flexible display panel is used to improve portability, then the device size is reduced, but the bending resistance and impact resistance are poor, making the panel easily damaged during repeated folding and unfolding
Solution Approach 1:
The patent incorporates a support structure (such as a rigid backplane or protective layer) behind the flexible display panel that provides beforehand cushioning and support. This support structure prevents the panel from experiencing excessive bending stress or impact damage during repeated folding and unfolding operations, thereby extending the service life of the compact flexible display panel while maintaining portability.
3Adaptability or versatility
If repeated folding and unfolding operations are performed to achieve portability, then the device can be compacted, but irreversible creases are generated on the flexible display panel, affecting flatness and display effect
Solution Approach 1:
The support structure mentioned above also serves to prevent crease formation by providing uniform support across the flexible display panel during folding and unfolding. This beforehand cushioning distributes the mechanical stress evenly, preventing localized deformation that would cause irreversible creases, thereby maintaining display quality while enabling portability.
Data Source
AI summary
The present application provides a hinge, a flexible display panel, and an electronic device, the electronic device includes a flexible display panel, the flexible display panel comprises a flexible display panel body and a hinge, the hinge comprises a first transmission member, a second transmission member, a third transmission member, and a fourth transmission member to form a four-link structure, such that a first rotating mechanism and a second rotating mechanism may achieve an effect of bilateral synchronous rotation.