Impact Absorption Layer with Microbubbles for Display Protection
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Solution Overview
Problem
Display devices such as PDP, LCD, and windows are fragile and prone to breakage due to external impacts, and conventional reinforcement methods using semi-tempered glass deteriorate optical characteristics and increase weight, necessitating a lightweight impact absorption solution.
Innovation Solution
An impact absorption layer with a thickness of 30 μm or more and a hardness of 20 or more, composed of pressure sensitive adhesive or acryl-based, urethane-based, urethane acrylate-based, silicon-based, or rubber-based compounds, incorporating micro bubbles with a diameter of 1 μm or less, is integrated into a film to enhance impact resistance without using semi-tempered glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If semi-tempered glass is used to reinforce panels, then impact resistance is improved, but optical characteristics deteriorate and weight increases
Solution Approach 1:
The patent applies porous materials by incorporating microbubbles (voids) into the adhesive layer, creating a cellular structure that absorbs impact energy through compression and deformation of the bubbles. This porous structure provides impact protection while maintaining optical transparency, as the microbubbles are too small to significantly scatter visible light
Solution Approach 2:
The patent uses composite materials by combining the adhesive layer with dispersed microbubbles of gas or low-refractive-index material. This creates a composite structure where the adhesive matrix provides structural integrity and adhesion, while the embedded microbubbles provide impact absorption. The composite achieves both mechanical protection and optical clarity
2Strength
If semi-tempered glass is used to reinforce panels, then impact resistance is improved, but weight increases
Solution Approach 1:
The porous adhesive layer with microbubbles provides impact absorption at a fraction of the weight of glass. The voids in the material reduce density while maintaining structural integrity through the cellular structure that dissipates impact energy
Solution Approach 2:
The patent changes the physical parameters of the adhesive by controlling microbubble size (0.1-10 μm), concentration (1-90 vol%), and distribution to optimize the balance between impact resistance and weight. By adjusting these parameters, the adhesive layer achieves protective functionality without the mass penalty of glass reinforcement
3Length of moving object
If glass substrates are made thinner for flat display devices, then flatness and thinness are improved, but impact resistance deteriorates
Solution Approach 1:
The patent applies beforehand cushioning by pre-installing the adhesive layer with microbubbles between the glass substrates before the device is assembled. This pre-positioned cushioning layer is designed to deform and absorb impact energy during accidental drops or impacts, protecting the thin glass from breaking despite its reduced thickness
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 impact absorption layer significantly improves the durability of display devices and windows by effectively absorbing impacts, preventing damage and maintaining optical clarity, while being lightweight and non-bulky.
Implementation Method 1
micro bubbles having a diameter of 1 μm or less are present in the impact absorption layer
Implementation Method 2
impact absorption layer having excellent impact resistance capable of protecting a display device, a glass substrate, or the like by absorbing external impacts
Data Source
AI summary
There is provided a film having use of impact absorption capable of protecting a panel from impacts when the impacts are given to a display device, a window since it has an excellent ability to absorb impacts given to a surface of a display device, a window, or equivalent base plates. The impact absorption layer having a thickness of 30 μm or more has a hardness of 20 to 100 as measured at a room temperature using an Asker C hardness tester. Also, the film having use of impact absorption has excellent impact resistance and includes at least one layer, wherein the film includes at least one impact absorption layer having a hardness of 20 to 100 as measured at a room temperature using an Asker C hardness tester, the impact absorption layer having the total thickness of 30 μm or more.