Stepped Bonding Structure for Flexible Display Anti-Drop Performance
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Solution Overview
Problem
Flexible screens in portable electronic devices tend to delaminate when dropped due to differing stresses on the screen and cover plate, leading to reduced durability and functionality.
Innovation Solution
A display assembly design featuring a frame with a bottom plate and side wall that supports a flexible display panel and a cover plate, where the cover plate's side surface is bonded to the side wall using an adhesive, creating a laminated structure that absorbs stress and enhances anti-drop performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible screen is attached with a cover plate to provide more functions and services, then the display functionality is improved, but the screen and cover plate are easy to delaminate when dropped due to different stresses
Solution Approach 1:
The patent transitions from a traditional flat bonding structure to a stepped multi-level bonding structure. The cover plate includes a first bonding area at a first level and a second bonding area at a second level, creating vertical dimensionality in the bonding interface. This stepped configuration allows differential stress absorption across multiple levels, preventing delamination while maintaining display functionality.
Solution Approach 2:
The bonding interface is segmented into multiple distinct bonding areas (first bonding area and second bonding area) at different levels. This segmentation allows each bonding area to independently manage stress, with the first bonding area handling primary bonding and the second bonding area providing additional stress distribution, thereby preventing delamination.
2Reliability
If the cover plate and display panel are firmly bonded to prevent delamination, then bonding reliability is improved, but the border width must be increased to provide sufficient bonding area
Solution Approach 1:
The patent utilizes vertical dimensionality through stepped levels to increase bonding area without increasing horizontal border width. The first bonding area and second bonding area are positioned at different vertical levels, allowing the bonding interface to extend in the vertical dimension while maintaining a compact horizontal footprint, thus avoiding increased border width.
Solution Approach 2:
The second bonding area is positioned within the vertical projection of the first bonding area, creating a nested configuration. This nesting allows the bonding interface to utilize vertical space efficiently, providing extended bonding area without increasing the horizontal boundary, thereby maintaining narrow borders while ensuring reliable bonding.
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 design improves the anti-drop performance and lifespan of portable electronic devices by distributing stress across the frame, preventing delamination and allowing for a narrower border while maintaining display functionality.
Implementation Method 1
The adhesive applied to bond the side surface of the cover plate to the side wall
Data Source
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AI summary
A display assembly is provided. The display panel may include a frame, a display panel, a cover plate, and an adhesive. The frame includes a bottom plate and a side wall. The display panel includes a top surface and a bottom surface, and the bottom surface of the display panel is attached on one surface of the bottom plate. The rear surface of the cover plate is attached to the top surface of the display panel. The side wall of the frame and the side surface of the cover plate may cooperatively define a gap. The adhesive is filled in the gap to bond the side surface of the cover plate to the side wall. An electronic device and a method for assembling the display assembly are also provided.