Foldable Display Shock Absorption Slit Design
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Solution Overview
Problem
Foldable displays are vulnerable to local shocks, which can cause poor display issues such as bright spots or dark dots due to the lack of a protective glass cover, making them more prone to breakdown.
Innovation Solution
A foldable display design featuring a flexible display layer, flexible cover, inflexible support substrates, and a shock absorption layer with a slit between the display layer and support substrates to disperse local shocks, reducing the likelihood of display damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glass cover is used to protect the display layer, then display protection is improved, but flexibility and foldability are worsened
Solution Approach 1:
The patent replaces the rigid glass cover with a flexible cover made of polymer materials that can bend and fold along with the display layer. This flexible cover maintains protective functions while enabling the device to be folded, directly resolving the contradiction between protection and flexibility.
Solution Approach 2:
The patent employs composite material structures combining flexible polymers with reinforcement layers to create a cover that provides both protection and flexibility. The composite construction allows the cover to withstand mechanical stresses during folding while maintaining its protective function.
2Adaptability or versatility
If the display layer is made flexible for folding, then foldability is improved, but vulnerability to local shock is worsened
Solution Approach 1:
The patent introduces a shock absorption layer positioned between the display layer and external impacts. This layer acts as a cushion that absorbs and dissipates local shock energy before it reaches the display layer, protecting the flexible display from damage during folding or drop events.
Solution Approach 2:
The shock absorption layer serves as an intermediary element between the display layer and external mechanical stresses. This intermediate layer transfers and distributes shock forces, preventing direct transmission of harmful impacts to the display layer while allowing the overall structure to remain flexible.
3Reliability
If a shock absorption layer is added to protect against local shock, then display reliability is improved, but device complexity is worsened
Solution Approach 1:
The shock absorption layer is implemented as a thin flexible film or layer that can be integrated into the existing flexible display structure. This thin-film approach provides effective shock absorption without significantly increasing device thickness or structural complexity.
Solution Approach 2:
The shock absorption layer uses composite material constructions that combine multiple functions (shock absorption, flexibility, adhesion) into a single integrated layer. This reduces the need for separate structural components and simplifies the overall device architecture while maintaining protection reliability.
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 effectively reduces the occurrence of poor display issues by dispersing local shocks, ensuring the display layer receives a low-strength impact, thus minimizing the risk of damage and maintaining display quality.
Implementation Method 1
a shock absorption layer disposed between the display layer and the first support substrate as well as between the display layer and the second support substrate. The shock absorption layer has a slit disposed in a portion overlapping the bending portion.
Data Source
AI summary
A foldable display includes: a display layer having flexibility, the display layer including a first display region, a second display region, and a third display region located between the first display region and the second display region; a cover having flexibility and covering the display layer; a first support substrate having inflexibility and supporting the first display region; a second support substrate having inflexibility and supporting the second display region; a bending portion including the third display region and being bendable; and a shock absorption layer disposed between the display layer and the first support substrate as well as between the display layer and the second support substrate. The shock absorption layer has a slit disposed in a portion overlapping the bending portion.