Foldable Display Cover Window Protection Layer for Shock Resistance
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Solution Overview
Problem
Existing foldable display devices lack effective protection for their cover windows against external shocks, which can lead to damage and breakage.
Innovation Solution
A cover window protection layer is applied to the display device using a thermocompression bonding process, covering the upper and side surfaces of the cover window, and is coupled with the cover window to enhance shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cover window is used in a foldable display device, then the display area can be expanded and portability improved, but the cover window becomes vulnerable to external shocks and damage
Solution Approach 1:
A protection layer is formed on the cover window before the device is put into service. This protection layer is created by depositing a protective material and then annealing it to form a compressed layer that provides shock absorption and damage prevention for the cover window during folding operations and external impacts.
Solution Approach 2:
The cover window structure is enhanced by creating a composite structure consisting of the original cover window material combined with a deposited protective material layer. The protective layer has different mechanical properties (higher compression strength) than the cover window material, creating a composite structure that resists external shocks while maintaining the foldable display functionality.
2Length of moving object
If the cover window is made thinner to improve flexibility for folding, then portability is enhanced, but the cover window becomes more susceptible to damage from external shocks
Solution Approach 1:
A thin cover window is combined with a deposited protective material layer to form a composite structure. The protective layer compensates for the reduced thickness by providing additional compression strength and shock resistance, allowing the cover window to remain thin for flexibility while gaining enhanced damage resistance through the composite structure.
Solution Approach 2:
The protective material is deposited and annealed beforehand to create a compressed protection layer on the thin cover window. This pre-formed protection layer acts as a cushion against external shocks, enabling the cover window to be thin yet resistant to damage during folding and handling.
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 protects the cover window from external shocks, reducing the risk of damage and enhancing the durability of the display device.
Implementation Method 1
providing a cover window structure of the display device by thermocompression bonding of a cover window protection material to the cover window to provide a cover window protection layer which is thermocompression bonded to the cover window
Data Source
AI summary
A display device includes a display area and a non-display area which is adjacent to the display area. The display device includes a display panel, and a cover window structure which is on the display panel. The cover window structure includes a cover window including a first surface facing the display panel, a second surface opposite to the first surface, and a third surface connecting the first surface with the second surface, and a first window protection layer on the cover window. The first window protection layer includes a first protection portion on the first surface of the cover window and a second protection portion on the third surface of the cover window, where the second protection portion is in the non-display area.