3D Impact Absorption Layer via UV Parallel Light Curing
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Solution Overview
Problem
Flexible display devices with thin film cover windows are prone to damage from external impacts due to direct transmission of forces, leading to reduced display quality.
Innovation Solution
A method for forming a three-dimensionally shaped impact absorption layer using UV parallel light in a multilayered laminated structure, comprising applying a composition, forming a polymer layer, placing a photomask, irradiating UV parallel light to cure a skeletal support, and then irradiating lower-intensity UV to form an impact-buffering portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If thin film cover windows are used in flexible display devices, then flexibility and ease of folding are improved, but impact resistance deteriorates due to direct transmission of external forces
Solution Approach 1:
The patent introduces a three-dimensionally shaped impact absorption layer with varying thickness between the cover window and display panel. This 3D structure creates additional spatial dimension for impact management, allowing the impact absorption layer to have greater thickness at edges (where impacts commonly occur) while maintaining thin profile over the display area, thus improving impact resistance without compromising flexibility
Solution Approach 2:
The patent employs a multilayered laminated structure combining the cover window, impact absorption layer, and display panel. The impact absorption layer itself is formed from composition layers with different properties (first and second composition layers), creating a composite structure that leverages the strengths of each material to achieve both flexibility and impact resistance
2Ease of operation
If the cover window and back plate are made of very thin film to enable folding, then ease of folding is improved, but impact resistance deteriorates as impacts are directly transmitted to the display panel
Solution Approach 1:
The patent places an impact absorption layer between the cover window and display panel that is designed to absorb and dissipate impact forces before they reach the display panel. This layer acts as a pre-positioned cushion that mitigates harmful impacts while maintaining the thin film structure needed for folding
Solution Approach 2:
The three-dimensionally shaped impact absorption layer with non-uniform thickness provides enhanced cushioning at critical areas (edges and corners) while maintaining overall thin profile, allowing the structure to be both foldable and impact-resistant
3Strength
If a three-dimensionally shaped impact absorption layer is formed using UV parallel light, then impact resistance and restoring force are improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses UV parallel light irradiation to cure the impact absorption layer composition, replacing traditional mechanical curing or heating methods. This optical curing approach enables precise three-dimensional shaping through photomask patterns while simplifying the manufacturing process by eliminating complex mechanical pressing or heating systems
Solution Approach 2:
The patent controls the curing process by adjusting UV light parameters (intensity, wavelength, irradiation time) and composition properties (photoinitiator content, viscosity) to achieve the desired three-dimensional shape and mechanical properties, allowing precise control of the impact absorption layer characteristics without complex manufacturing equipment
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 resulting impact absorption layer exhibits enhanced impact resistance, restoring force, and elongation, effectively dispersing internal and external impacts and improving the durability of flexible display devices.
Implementation Method 1
irradiating UV parallel light onto the photomask from two to eight directions at an angle greater than 0° and less than 90° with respect to a plane perpendicular to an exposure plane so that an impact absorption layer skeletal support is cured in parallel with the angle of the parallel light
Implementation Method 2
irradiating UV light having a lower intensity than that of the UV parallel light to form an impact-buffering portion around the skeletal support
Data Source
AI summary
The method of forming a three-dimensionally shaped impact absorption layer by using UV parallel light in a multi-layered laminated structure includes: (a) applying a composition for forming an impact absorption layer on top of a substrate; (b) forming a polymer layer on top of the composition; (c) placing a photomask on top of the polymer layer; (d) irradiating UV parallel light onto the photomask from two to eight directions at an angle greater than 0° and less than 90° with respect to a plane perpendicular to an exposure plane so that an impact absorption layer skeletal support is cured in parallel with the angle of the parallel light; and (e) removing the photomask and irradiating UV light having a lower intensity than that of the UV parallel light to form an impact-buffering portion around the skeletal support, thereby completing a three-dimensionally shaped impact absorption layer.