Foldable Display Panel Cushion Structure for Easier Bending
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Solution Overview
Problem
Existing display devices face challenges in easily bending the display panel's bending region and reducing the panel's thickness, as current designs often require thicker components to maintain structural integrity and functionality.
Innovation Solution
The display device incorporates a substrate with a bending region, a protective substrate thinner than the substrate and cushion layer, and adhesive layers to allow for easier bending and reduced thickness, using a polyimide protective substrate and a cushion layer to absorb impacts and reduce thickness in the bending region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thicker protective substrate is used to maintain structural integrity, then the display panel becomes more durable, but the bending region becomes harder to bend and the overall thickness increases
Solution Approach 1:
The protective substrate is configured with different thicknesses in different regions: a first thickness in the bending region and a second thickness in non-bending regions. This local variation allows the bending region to be more easily bent while maintaining structural integrity in other areas.
Solution Approach 2:
The protective substrate is divided into multiple regions with different thickness characteristics. The bending region has a reduced thickness compared to non-bending regions, creating segmented thickness zones that optimize both flexibility and strength.
2Strength
If thicker components are used to maintain structural integrity, then the display panel becomes more durable, but the overall thickness of the display panel increases
Solution Approach 1:
The protective substrate uses different thicknesses in different regions, with the bending region having a smaller thickness than non-bending regions. This localized thinning reduces overall panel thickness while maintaining structural integrity where needed.
Solution Approach 2:
The protective substrate is segmented into regions of different thicknesses, allowing the overall panel thickness to be reduced in critical areas while maintaining adequate thickness in areas requiring structural support.
3Ease of operation
If the protective substrate thickness is reduced to enable easier bending and thinner panel, then structural protection is compromised
Solution Approach 1:
The protective substrate maintains adequate thickness in non-bending regions to provide structural protection, while reducing thickness only in the bending region where flexibility is required. This localized approach preserves protective capability while enabling easier bending.
Solution Approach 2:
The protective substrate is divided into functional zones: a bending region with reduced thickness for flexibility and non-bending regions with sufficient thickness for protection. This segmentation ensures both bending ease and structural protection are achieved.
Data Source
AI summary
A display device includes a substrate including a first region, a second region, and a bending region between the first region and the second region, a protective substrate disposed below the substrate in the first region, the second region, and the bending region, a cushion layer disposed below the protective substrate in the first region and the second region, a pixel layer disposed on the substrate in the second region, and a drive chip disposed on the substrate in the first region. The substrate is bent at the bending region such that the first region overlaps the second region.