Backlight Unit Diffusing Plate Protection Layer Friction Reduction
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Solution Overview
Problem
Conventional liquid crystal displays suffer from scratches and stains due to friction between the light guide plate and diffusing layer during assembly, leading to image quality issues.
Innovation Solution
A liquid crystal display design featuring a light guide plate with a patterned base surface, a reflection plate seated on a bottom cover, and a diffusing plate with a protection layer facing the light guide plate and a diffusing layer facing the reflection plate, which reduces frictional forces and prevents stains through optical diffusing and scattering characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light guide plate and diffusing plate are assembled with direct contact, then the structure is simple and easy to manufacture, but friction occurs between the protrusion and diffusing layer causing scratches and stains
Solution Approach 1:
A cushioning member is introduced as an intermediary component between the light guide plate and the diffusing plate. This cushioning member contacts the protrusion of the light guide plate and the lower surface of the diffusing plate, preventing direct contact between the potentially damaging surfaces while maintaining the structural connection and reducing friction-induced scratches and stains.
Solution Approach 2:
The cushioning member is positioned in advance between the light guide plate and diffusing plate to provide protective cushioning before any friction or contact damage can occur. This pre-positioned cushioning element prevents the harmful frictional contact between the protrusion and diffusing layer during assembly and operation.
2Object-affected harmful factors
If a cushioning member is added between the light guide plate and diffusing plate, then friction and scratches are reduced, but the device structure becomes more complex
Solution Approach 1:
The cushioning member is implemented as a thin, flexible component that can conform to the contact surfaces between the light guide plate and diffusing plate. This thin-film approach provides the necessary friction reduction and protection while minimizing the increase in structural complexity and maintaining a compact overall design.
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 design effectively prevents stains on the liquid crystal panel by minimizing friction and light loss, enhancing display quality and resolving scratch issues.
Implementation Method 1
a diffusing layer formed on the other surface to face the reflection plate... optical diffusing and scattering characteristics
Data Source
AI summary
Disclosed is a liquid crystal display including a liquid crystal panel, a light guide plate that transfers light from a light source to the liquid crystal panel and has a pattern formed on a base surface, a reflection plate that is positioned under the light guide plate and seated on a bottom cover, and a diffusing plate that is positioned between the light guide plate and the reflection plate and has a protection layer formed on a surface to face the light guide plate and a diffusing layer formed on the other surface to face the reflection plate.