Foldable Display Circuit Board Reinforcement for Bend Durability
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Solution Overview
Problem
Existing display devices face challenges in maintaining structural integrity and flexibility, particularly in bendable designs, as components like circuit boards and substrates require reinforcement to withstand bending without compromising functionality.
Innovation Solution
Incorporating a rigid reinforcement portion made of materials like stainless steel, polyethylene terephthalate, or copper, which connects circuit boards and provides structural support, along with a bending protection layer and support substrates to enhance durability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid reinforcement portion is added to connect the substrate and second circuit board, then structural integrity and rigidity are improved, but device complexity increases
Solution Approach 1:
The reinforcement portion integrates multiple functions: it structurally connects the substrate to the second circuit board while simultaneously providing rigidity to the flexible circuit board assembly. This merging of connection and reinforcement functions into a single component reduces overall device complexity despite adding structural strength.
Solution Approach 2:
The reinforcement portion is constructed from composite materials including stainless steel, polyethylene terephthalate (PET), graphite, or copper, combining the advantages of different materials to achieve both mechanical strength and flexibility required for the bendable display device structure.
2Adaptability or versatility
If the first circuit board is made flexible to allow bending, then adaptability is improved, but reliability deteriorates due to potential damage during bending
Solution Approach 1:
The reinforcement portion is positioned and configured in advance to provide protective support during bending operations. By pre-positioning this rigid structure, the circuit board is cushioned against damage when bent, maintaining reliability while enabling flexible adaptability.
Solution Approach 2:
The reinforcement portion is strategically placed at specific locations where the circuit board requires support during bending, rather than making the entire structure rigid. This localized reinforcement maintains flexibility in non-critical areas while protecting vulnerable components.
Data Source
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AI summary
A display device includes a substrate that includes a first area, a second area spaced apart from the first area, and a bendable area that connects the first area to the second area, a support substrate disposed below the substrate and that supports the substrate, a display portion disposed in the first area of the substrate, a first circuit board connected to the second area of the substrate and that includes a flexible film, a second circuit board connected to the first circuit board, and a rigid reinforcement portion that connects the second area of the substrate to the second circuit board and covers the first circuit board.