Foldable Display Panel Carrier Structure 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 panel's thickness, as current designs often result in increased thickness due to the presence of drive chips and protective substrates.
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 the substrate to be bent, reducing thickness and facilitating easier bending by using a polyimide protective substrate and a cushion layer, while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protective substrate and cushion layer are added to protect the display panel, then the structural integrity is improved, but the thickness of the display panel increases
Solution Approach 1:
The patent employs a thin protective substrate made of flexible material (such as polyimide) that provides necessary protection while maintaining flexibility and minimizing thickness increase. This thin film approach allows the display panel to be protected without significantly increasing overall thickness, resolving the contradiction between structural integrity and panel thickness.
Solution Approach 2:
The patent optimizes the thickness parameters of the protective substrate and cushion layer to achieve the minimum necessary protection while keeping the overall panel thickness reduced. By carefully controlling the thickness parameters of each layer, the patent balances protection requirements with the goal of maintaining a thin display panel.
2Reliability
If drive chips and protective substrates are included in the display panel structure, then the reliability is improved, but the ease of bending the panel is reduced
Solution Approach 1:
The patent uses flexible materials for the protective substrate and employs a thin-film structure that can bend without cracking or damaging the drive chips. The flexible nature of these components allows the display panel to be bent while maintaining reliability, resolving the contradiction between protection and bendability.
Solution Approach 2:
The patent divides the display panel into distinct regions including a bending region with specific structural characteristics that allow flexibility, while other regions maintain rigid protective structures. This segmentation allows different parts of the panel to have different properties - some areas optimized for bending and others for protection - resolving the contradiction between reliability and ease of bending.
3Manufacturing precision
If the display panel is designed with multiple layers for protection and functionality, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated layers and structures, reducing the number of separate components that need to be manufactured and assembled with high precision. By merging protective, structural, and functional elements into unified components, the patent maintains manufacturing precision while reducing overall device complexity.
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
This configuration enables the display panel to be more easily bent and reduces its thickness, enhancing flexibility and manufacturing efficiency while maintaining image display capabilities.
Implementation Method 1
a first adhesive layer disposed between the substrate and the protective 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.