Flexible Display Chassis Stoppers for Wrinkle-Free Bending Regions
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Solution Overview
Problem
Flexible displays in electronic devices with bendable regions tend to develop wrinkles and waves due to displacement of supporting plates relative to chassis members, especially upon impact, deteriorating visibility and appearance quality.
Innovation Solution
An electronic apparatus design featuring a first and second chassis member with rotatable connection, a flexible display fixed to each chassis via plates, and a stopper member interposed between a protruding portion of the display's plate and a wall portion of the chassis to restrict relative movement, along with tension applied to the bending region during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display is fixed to plates that are supported by chassis members, then the display can be stabilized during normal operation, but the display may still produce wrinkles when the plates displace relative to the chassis members upon impact
Solution Approach 1:
The patent applies preliminary action by pre-positioning the plate such that its rear surface is substantially coplanar with the rear surface of the chassis member before final fixation. This preliminary alignment ensures that when the plate is fixed, the bending region of the display is already in the correct position and orientation, preventing wrinkles from forming even if displacement occurs later during impact or normal operation.
Solution Approach 2:
The patent uses an intermediary approach by introducing a specific structural feature (the coplanar positioning interface between the plate rear surface and chassis member rear surface) that mediates the relationship between the plate and chassis. This intermediary structural detail ensures proper alignment and prevents the harmful effect of wrinkles by establishing a stable, wrinkle-free connection before the display is subjected to operational forces.
2Adaptability or versatility
If the bending region is left in a free state to enable flexibility, then the display can bend, but the bending region produces protruding wrinkles and waves when opened into a flat plate shape
Solution Approach 1:
The patent applies preliminary action by pre-aligning the plate and chassis member surfaces before fixation. This preliminary coplanar positioning ensures that when the display is in its flat plate configuration, the bending region maintains proper tension and geometry, preventing the formation of wrinkles and waves while preserving the ability to bend when needed.
Solution Approach 2:
The patent utilizes parameter changes by controlling the spatial relationship between the plate rear surface and chassis member rear surface to be substantially coplanar. This parameter control (alignment in the rear surface plane) ensures that the bending region maintains optimal geometric parameters during flat configuration, preventing wrinkles while allowing flexibility when the display needs to bend.
3Manufacturing precision
If tension is applied to the bending region during manufacture to prevent wrinkles, then wrinkles are suppressed during assembly, but the display may still produce wrinkles if the plate displaces relative to the chassis member during operation
Solution Approach 1:
The patent applies preliminary action by establishing the coplanar relationship between the plate rear surface and chassis member rear surface during the manufacturing and assembly process. This preliminary structural arrangement ensures that the plate is correctly positioned before the display is put into service, so that tension is properly applied to the bending region and wrinkles are prevented not only during assembly but also during subsequent operation, even if minor displacements occur.
Data Source
AI summary
An electronic apparatus includes a first chassis member, a second chassis member, first plate supported by the first chassis member, second plate supported by the second chassis member and aligned with a gap between the first plate and the second plate, display formed in a sheet shape having flexibility, first fastening portion that fixes the first plate to the first chassis member, and second fastening portion that fixes the second plate to the second chassis member. The first plate has a protruding portion that protrudes from a rear surface, and the first chassis member has a wall portion that faces the protruding portion. A stopper member is interposed between the protruding portion and the wall portion and restricts relative movement of the first plate with respect to the first chassis member in an alignment direction of the first plate and the second plate.