Flexible Display Window Structure for Bending and Impact Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible displays with transparent polyimide or ultra-thin glass windows are prone to damage from repetitive bending and external impacts, leading to increased risk of cracking and detachment of protective films.
Innovation Solution
A flexible display design incorporating elongated glass members and optically transparent polymers, with a bundling member to enhance impact strength and reduce bending resistance, featuring a flexible window with a flat-plate glass member and optically transparent polymer layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible window is made of transparent polyimide, then flexibility is improved, but impact strength deteriorates causing damage from repetitive bending
Solution Approach 1:
The patent applies composite materials by combining transparent polyimide with ultra-thin glass layers to create a flexible window structure that maintains flexibility while significantly improving impact strength and resistance to repetitive bending damage
Solution Approach 2:
The patent applies local quality by using different materials in different regions of the flexible window - transparent polyimide for flexibility and ultra-thin glass for impact resistance - creating a heterogeneous structure where each material performs its optimal function in the appropriate location
2Strength
If ultra-thin glass is used for flexible window, then impact strength is improved, but thickness must be reduced to 30-50 μm which weakens impact strength
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness of ultra-thin glass to 30-50 μm and controlling the refractive index matching between glass and polymer layers, achieving a balance between flexibility and impact strength that resolves the contradiction between thinness and strength
3Ease of operation
If bending radius of flexible display increases, then flexibility is improved, but resistance to bending increases causing screen protection film detachment
Solution Approach 1:
The patent applies flexible shells and thin films by using ultra-thin glass layers (30-50 μm) that can bend with the flexible display panel, reducing bending resistance and preventing screen protection film detachment while maintaining flexibility through the thin-film structure
4Strength
If multiple elongated glass members are used, then impact strength is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the flexible window into multiple elongated glass members oriented parallel to the bending axis, where each segment contributes to impact strength while the segmented structure reduces overall complexity by distributing stress across multiple smaller components
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 design improves impact strength and reduces bending resistance, minimizing damage and detachment of protective films, while maintaining flexibility and visibility.
Implementation Method 1
an optically transparent polymer coupled to the multiple elongated glass members, the optically transparent polymer having flexibility and a refractive index similar to a refractive index of the multiple elongated glass members
Data Source
AI summary
An electronic device including a flexible display is provided. The electronic device includes a flexible display including a flexible display panel configured to display an image in a first direction, and a flexible window which is disposed in the first direction of the flexible display panel, based on the direction in which the image of the flexible display panel is displayed, and including a first part and a second part. The second part may include a flat-plate glass member. The first part may include multiple elongated glass members oriented parallel to the bending axis on a plane surface on which the flat-plate glass member is disposed in an unflexed state of the flexible window, and an optically transparent polymer disposed in a region positioned in the first direction and a region positioned in a second direction opposite to the first direction, coupled to the multiple elongated glass members.