Folding Display Elasticity Control Layer for Wrinkle Resistance
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Solution Overview
Problem
Existing flexible display devices face challenges in maintaining elasticity and durability in folding areas, leading to wrinkles and reduced robustness.
Innovation Solution
A display device with a deposition method for organic and inorganic layers in the folding structure, incorporating an elasticity control layer that adjusts thickness and elasticity based on the folded shape, and a touch sensing unit to enhance user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display devices are folded, then portability and versatility are improved, but wrinkles and reduced robustness occur in folding areas
Solution Approach 1:
The patent applies local quality by configuring different layer structures in different areas of the display device. Specifically, the first and second encapsulation layers are formed with different thicknesses in folding areas versus non-folding areas, allowing the folding regions to have enhanced flexibility and crack resistance while non-folding areas maintain standard structural properties.
Solution Approach 2:
The patent uses composite materials by combining organic encapsulation layers with inorganic encapsulation layers. The first encapsulation layer (organic) provides flexibility and crack resistance, while the second encapsulation layer (inorganic) provides barrier properties, creating a composite structure that addresses both flexibility and protection needs in folding display devices.
2Ease of manufacture
If uniform thickness encapsulation layers are used, then manufacturing simplicity is maintained, but elasticity and durability in folding areas are insufficient
Solution Approach 1:
The patent implements local quality by forming the first encapsulation layer with a first thickness in folding areas and a second thickness (different from the first) in non-folding areas. This localized thickness variation enhances durability in folding regions while maintaining manufacturing feasibility through selective area processing.
Solution Approach 2:
The patent segments the encapsulation structure into multiple functional layers with different properties. The first encapsulation layer is segmented by thickness variation (thicker in folding areas, thinner in non-folding areas), while the second encapsulation layer provides uniform coverage, creating a segmented approach to solving the durability-simplicity contradiction.
3Strength
If thicker encapsulation layers are used in folding areas, then elasticity and crack resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The patent reduces manufacturing complexity by applying local quality principles - the first encapsulation layer is formed with enhanced thickness only in specific folding areas where it is needed for crack resistance, while non-folding areas have reduced thickness. This targeted approach avoids the need to uniformly increase thickness across the entire device, thereby limiting the increase in manufacturing complexity.
Solution Approach 2:
The patent introduces a deposition method as an intermediary technique that enables selective thickness control of the first encapsulation layer. This deposition process acts as a mediator between the design requirement (thicker layers in folding areas) and manufacturing capability, allowing precise thickness variation without proportionally increasing overall manufacturing 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
Improves elasticity and durability of folding areas, reducing wrinkles and enhancing user satisfaction and reliability by maintaining robustness in flexible display devices.
Implementation Method 1
an elasticity control layer disposed on the display layer and having an area corresponding to the area of the folding area
Implementation Method 2
a deposition method to provide deposition structure for an organic layer and an inorganic layer formed in a display panel based on the folding structure and folding area of the display panel
Data Source
AI summary
A display device includes a display panel including a folding area, and a display driving circuit which drives image display pixels of the display panel, where the display panel includes a display layer, in which the image display pixels are disposed, an elasticity control layer disposed on the display layer and having an area corresponding to the area of the folding area, and a touch sensing unit disposed on the elasticity control layer to detect a user's touch.