Silicon Compound Hard Coating Film Self-Healing Diselenide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hard coating films for display devices suffer from inadequate anti-scratch characteristics and strength, particularly when thickness is reduced for slim, lightweight designs, and compatibility issues with polyimide resins lead to degraded light transmissivity.
Innovation Solution
A silicon compound with adjacent siloxane moieties linked via a diselenide group is used, providing a self-healing mechanism that improves hardness and anti-scratch properties by re-forming the diselenide group under light irradiation, even after dissociation due to external stress, and is incorporated into a hard coating film or prism sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the thickness of the hard coating film is reduced to achieve slim and lightweight display devices, then the weight and size of the device are reduced, but the anti-scratch characteristics and strength of the hard coating film deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters of the hard coating film by incorporating specific resin combinations (polymer resin with epoxy group, polyimide resin, and acrylic resin) and controlling their weight ratios. This allows achieving sufficient hardness and anti-scratch properties even at reduced film thickness, resolving the contradiction between thinness and strength
Solution Approach 2:
The patent uses a composite material system combining multiple resin types (polymer resin containing epoxy group, polyimide resin, and acrylic resin) with complementary properties. The polymer resin provides adhesion and flexibility, polyimide resin contributes to hardness, and acrylic resin enhances scratch resistance, creating a synergistic effect that maintains strength at reduced thickness
2Strength
If polyimide resin is added to improve hardness, then the hardness of the hard coating film is improved, but compatibility with acrylate-based resin deteriorates and light transmissivity is degraded
Solution Approach 1:
The patent applies local quality by assigning specific functions to different resin components: the polymer resin with epoxy group provides adhesion and compatibility, the polyimide resin contributes hardness in specific proportions, and the acrylic resin enhances scratch resistance. This localized functional assignment allows optimizing each property without compromising overall compatibility and light transmissivity
Solution Approach 2:
The patent precisely controls the weight ratios of different resins to achieve optimal balance. By adjusting the content of polyimide resin relative to other components, the patent achieves sufficient hardness while maintaining compatibility with acrylate-based resin and preserving light transmissivity, resolving the contradiction between hardness and optical properties
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 silicon compound enhances the durability and hardness of the hard coating film, preventing surface damage and maintaining optical clarity, enabling the creation of lightweight, thin display devices without the need for cover glass.
Implementation Method 1
providing a self-healing mechanism that improves hardness and anti-scratch properties by re-forming the diselenide group under light irradiation, even after dissociation due to external stress
Data Source
AI summary
A liquid crystal display device includes a liquid crystal panel; and a backlight unit disposed at one side of the liquid crystal panel. The backlight unit includes a prism sheet, which comprises a base and a plurality of prism patterns arranged on the base and a binder and a silicon compound having adjacent siloxane moieties linked via a diselenide group, and a light source disposed at a lower portion of the prism sheet. In the liquid crystal display device, the prism sheet is disposed between the light source and the liquid crystal panel.