Flexible Display Assembly Conductive Adhesive ESD Protection
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Solution Overview
Problem
Foldable flexible display devices face electro-static discharge (ESD) failures and stress concentration issues due to disconnected copper foil and steel sheets, leading to potential membrane draping and reduced carrying convenience.
Innovation Solution
A display assembly with a flexible display panel, a metal resilient member, and conductive adhesive structures connecting metal supports to a grounding point, ensuring electrical connectivity and reducing stress concentration at the bending area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If copper foil is disconnected in the middle part to enable folding, then folding capability is improved, but electrical connectivity and ESD protection are worsened
Solution Approach 1:
The metal support is divided into first and second support parts separated by a bending area, allowing the structure to be segmented for folding while maintaining overall functionality. The conductive adhesive structures bridge these segments to preserve electrical connectivity during folding operations.
Solution Approach 2:
Conductive adhesive structures serve as intermediaries between the metal support parts and the metal resilient member, enabling electrical connectivity to be maintained through the bending area. These adhesive structures act as conductive pathways that bridge the gap created by the disconnected copper foil design.
2Strength
If metal support is added for support strength, then structural strength is improved, but stress concentration at bending area is worsened
Solution Approach 1:
The metal support features a bending area with different structural characteristics compared to other regions. This local quality change allows the bending area to better accommodate stress during folding, preventing stress concentration while maintaining overall structural strength. The adhesive layer thickness and conductive adhesive structures are also locally optimized at the bending area.
Solution Approach 2:
The adhesive layer and conductive adhesive structures are designed with specific thicknesses and material properties to cushion and distribute stress before it concentrates at the bending area. This prior cushioning effect prevents excessive stress concentration during folding operations.
3Temperature
If copper foil is added for heat dissipation, then heat dissipation capability is improved, but ESD protection is worsened due to disconnection
Solution Approach 1:
The metal support structure serves multiple functions simultaneously: it provides structural support, enables heat dissipation through its metallic composition, and ensures ESD protection through the conductive adhesive structures that maintain electrical connectivity. This multi-functionality resolves the contradiction between heat dissipation and ESD protection.
Solution Approach 2:
The conductive adhesive structures act as intermediaries that maintain electrical connectivity between the metal support and the metal resilient member, ensuring ESD protection is not compromised. These conductive pathways allow static electricity to be discharged properly even though the copper foil is disconnected in the middle part.
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
Prevents ESD failures and reduces stress concentration at the bending area, enhancing the display assembly's durability and carrying convenience by effectively dissipating static electricity and distributing stress.
Implementation Method 1
a first conductive adhesive structure located at the edge of the bending area and connecting the first support part and the metal resilient member; and a second conductive adhesive structure located at the edge of the bending area and connecting the second support part and the metal resilient member
Implementation Method 2
the metal support is fixedly attached to the metal resilient member by an adhesive layer
Data Source
AI summary
The present disclosure provides a display assembly and a display device, the display assembly includes: a flexible display panel including a first display area, a second display area and a bending area formed between the first display area and the second display area, a metal resilient member fixedly attached to one side of the flexible display panel, a metal support located on a side, away from the flexible display panel, of the metal resilient member, a first conductive adhesive structure located at the edge of the bending area and connecting the first support part and the metal resilient member, and a second conductive adhesive structure located at the edge of the bending area and connecting the second support part with the metal resilient member, wherein the metal support is fixedly attached to the metal resilient member by an adhesive layer.