Foldable Display Panel Layout for Thin Bending Regions
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Solution Overview
Problem
Existing display devices face challenges in easily bending the display panel's bending region and reducing the thickness of the display panel while maintaining structural integrity and image display capabilities.
Innovation Solution
The display device incorporates a substrate with a bending region, a protective substrate with a thickness of about 5 μm to 20 μm, and a cushion layer, allowing the substrate to be bent such that the first region overlaps the second region, thereby reducing the thickness and enhancing bendability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional display panel structure is used, then structural integrity is maintained, but the bending region cannot be easily bent and the thickness cannot be reduced
Solution Approach 1:
The display panel is divided into distinct regions: a first region with the substrate and protective substrate, a second region with the pixel layer, and a bending region connecting them. This segmentation allows different mechanical properties in different areas, enabling the bending region to be flexible while maintaining structural integrity in other areas.
Solution Approach 2:
The protective substrate is positioned specifically in the first region and bending region, while the pixel layer is in the second region. This local differentiation of components allows the bending region to have the necessary flexibility while the pixel region maintains its functional integrity.
2Length of moving object
If the display panel thickness is reduced, then flexibility is improved, but manufacturing complexity increases
Solution Approach 1:
The protective substrate is disposed below the substrate in a nested configuration, with the cushion layer positioned below the protective substrate. This nested arrangement allows multiple functional layers to be integrated in a compact thickness while maintaining clear structural relationships and simplifying the manufacturing process.
Solution Approach 2:
Instead of reducing thickness by thinning individual layers, the invention achieves thickness reduction by optimizing the arrangement and positioning of layers in the vertical dimension, particularly by placing the protective substrate and cushion layer in specific positions below the main substrate.
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.