Self-Lubricating Diffusion Sheet for Anti-Scratch Backlight Modules
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Solution Overview
Problem
Liquid crystal display backlight modules face issues with friction and scratching during transportation, leading to display defects due to inadequate anti-scratching performance of diffusion sheets, despite attempts to improve compressibility by varying particle size distributions.
Innovation Solution
A diffusion sheet with a substrate and a diffusion layer containing modified graphene self-lubricating particles and diffusion particles, distributed uniformly, which reduces friction and enhances anti-scratching performance by modifying the surface of graphene particles with hydroxyl acrylamide, allyl glycidyl ether, or acrylic acid, and using a water-soluble resin with functional additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If diffusion particles with varied particle size distributions are used to improve compressibility, then the compressibility of the diffusion sheet is improved, but the anti-scratching performance deteriorates due to friction during transportation
Solution Approach 1:
The patent introduces self-lubricating particles as an intermediary substance between the diffusion particles and external environment. These particles form a protective layer that reduces friction and prevents scratching during transportation, while still allowing the diffusion particles to maintain their light-diffusing function. The self-lubricating particles act as a mediator that resolves the contradiction between compressibility and anti-scratching performance.
Solution Approach 2:
The patent creates a composite material system by combining diffusion particles with self-lubricating particles in the diffusion layer. This composite structure integrates the light-diffusing properties of diffusion particles with the friction-reducing properties of self-lubricating particles, achieving both improved compressibility and enhanced anti-scratching performance simultaneously.
2Ease of manufacture
If the diffusion sheet structure is simplified, then the manufacturing cost is reduced, but the anti-scratching performance deteriorates due to inadequate protection during transportation
Solution Approach 1:
The self-lubricating particles serve multiple functions simultaneously: they reduce friction during transportation (anti-scratching protection), maintain the compressibility of the diffusion sheet, and can be integrated into the existing diffusion layer structure without requiring separate protective layers. This multi-functionality achieves improved anti-scratching performance while keeping the manufacturing process simple and cost-effective.
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 diffusion sheet effectively reduces friction and improves anti-scratching performance, enhancing the yield and reducing production costs of display products by providing a self-lubricating and anti-scratching effect.
Implementation Method 1
a plurality of self-lubricating particles distributed in the first base layer
Implementation Method 2
configured to convert a point light source into a surface light source according to different refractive indexes of diffusion particles on a surface thereof
Data Source
AI summary
The disclosure discloses a diffusion sheet, a method for fabricating the same, a backlight module, and a display device, and the diffusion sheet includes: a substrate; and a diffusion layer arranged on a side of the substrate, wherein the diffusion layer includes a first base layer, and a plurality of diffusion particles and a plurality of self-lubricating particles distributed in the first base layer.