Ultra-Thin Glass Cover Structure for Flexible Display Edge Cracking
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Solution Overview
Problem
Flexible display apparatuses face challenges in maintaining durability and impact resistance, particularly at the edges, due to repeated bending and stretching, which can lead to cracking and damage.
Innovation Solution
A cover for a display panel comprising a cover film, adhesive layers, a polarizer, a phase difference layer, ultra-thin glass, and an opaque filler layer that abuts the periphery of the glass, providing enhanced bending flexibility and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If ultra-thin glass is used in the cover, then the cover becomes thinner and lighter, but the glass becomes more fragile and prone to cracking under bending
Solution Approach 1:
The patent replaces traditional thick glass with ultra-thin glass (3-10 μm) combined with flexible polymer layers (PET or PI film) to create a flexible cover structure. The thin film layers provide the necessary flexibility and crack resistance while maintaining the ultra-thin profile, allowing the cover to bend without breaking the glass component.
Solution Approach 2:
The patent creates a composite structure combining ultra-thin glass with flexible polymer materials (PET/PI film) and adhesive layers. This composite material system integrates the transparency and hardness of glass with the flexibility and crack resistance of polymers, resolving the contradiction between thinness and fragility.
2Strength
If the cover structure is made more robust to prevent cracking, then impact resistance improves, but the overall thickness and weight increase
Solution Approach 1:
The flexible polymer film layers (50-200 μm) serve as shock-absorbing elements that distribute impact forces across the cover structure. These thin flexible layers provide enhanced impact resistance without adding significant thickness, as they can deform elastically to absorb energy while maintaining the overall thin profile of the cover.
Solution Approach 2:
The patent incorporates adhesive layers (1-10 μm) and flexible film layers that act as cushioning elements between the ultra-thin glass and the display panel. These layers are positioned in advance to absorb and distribute impact forces, preventing stress concentration on the fragile glass before damage can occur.
3Reliability
If multiple protective layers are added to enhance durability, then crack resistance improves, but the manufacturing complexity increases
Solution Approach 1:
The patent combines multiple functional layers (ultra-thin glass, flexible film, adhesive layers) into an integrated cover structure that is manufactured as a single assembly. The layers are bonded together using adhesive layers to form one unified component, simplifying the manufacturing process compared to assembling separate protective components, while still providing enhanced durability through the combined protective effects of all layers.
Data Source
AI summary
A cover for a display panel is provided. The cover for a display panel includes a cover film; a first adhesive layer on the cover film; a polarizer on a side of the first adhesive layer away from the cover film; a phase difference layer on a side of the polarizer away from the first adhesive layer; a second adhesive layer on a side of the phase difference layer away from the polarizer; and an ultra-thin glass and an opaque filler layer on a side of the second adhesive layer away from the phase difference layer. The opaque filler layer includes an opaque material. The opaque filler layer abuts at least a portion of a periphery of the ultra-thin glass.