Foldable Display Bending Protection Layer for Uniform Thickness
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Solution Overview
Problem
Existing display devices with bendable portions face challenges in minimizing damage and manufacturing costs while maintaining reliability during the manufacturing process.
Innovation Solution
A display device design incorporating a pre-formed and post-formed bending protection layer structure, with overlapping layers and controlled thickness, to enhance reliability and uniformity, and a method of manufacturing involving staged application of curable materials to maintain thickness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bending protection layer is applied to protect the conductive layers during bending, then the reliability of the display device is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The bending protection layer is divided into multiple separate layers (first bending protection layer, second bending protection layer, third bending protection layer) rather than applying a single thick layer. This segmentation allows each layer to be formed and cured independently, simplifying the manufacturing process while providing comprehensive protection to the conductive layers during bending operations
Solution Approach 2:
The first bending protection layer is formed and cured before the second and third layers are applied. This preliminary action ensures that the conductive layers are protected from the beginning of the stacking process, preventing damage during subsequent manufacturing steps while maintaining a manageable manufacturing complexity through staged application
2Manufacturing precision
If multiple bending protection layers are formed to ensure uniform thickness, then the manufacturing precision is improved, but the manufacturing time and cost increase
Solution Approach 1:
The bending protection layer is formed in three separate stages (first, second, and third layers) rather than attempting to form a single uniform layer. This segmentation enables better control over the thickness of each individual layer, ensuring overall uniformity while allowing for more manageable curing processes that reduce total manufacturing time compared to forming and curing one extremely thick layer
Solution Approach 2:
Multiple bending protection layers are applied, which may seem excessive, but each layer contributes to the overall thickness uniformity. The cumulative effect of multiple thin layers provides more consistent protection and uniform thickness distribution than a single thick layer, while the staged application allows for efficient curing processes
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
The solution improves the reliability and uniformity of the bending protection layer, effectively protecting the conductive layers and maintaining the integrity of the display device even when bent, while reducing manufacturing costs.
Implementation Method 1
forming a bending protection layer including a pre-formed bending protection layer and a post-formed bending protection layer on the display panel
Data Source
AI summary
A display device includes: a display panel having a first area, a second area spaced apart from the first area in a first direction, and a bending area between the first area and the second area; a polarization layer in the first area on the display panel; and a bending protection layer on the display panel and including: a pre-formed bending protection layer spaced apart from the polarization layer in the first direction; a first post-formed bending protection layer between the polarization layer and the pre-formed bending protection layer; and a second post-formed bending protection layer spaced apart from the first post-formed bending protection layer with the pre-formed bending protection layer interposed therebetween.