Reflection Screen Prism Coating Scratch Resistance
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Solution Overview
Problem
Reflection type screens with convex-shaped portions are prone to scratching, leading to peeling off of the layer formed on inclined surfaces, which affects their durability and performance.
Innovation Solution
A reflection type screen design featuring a tabular base portion with prism portions that have inclined surfaces and a reflecting layer with a low friction coefficient, dispersed within the reflecting portion, to enhance scratch resistance and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a layer is formed on the inclined surface of the convex-shaped portion, then light reflection performance is improved, but the layer gets peeled off by scratching
Solution Approach 1:
The patent changes the surface friction parameter by introducing a low friction coefficient layer (such as fluorine resin or silicone resin) on the inclined surface. This parameter change reduces the friction between the reflecting layer and external objects, preventing the layer from peeling off during scratching while maintaining the light reflection performance of the convex-shaped portion.
Solution Approach 2:
The patent uses composite materials by combining the convex-shaped portion structure with a low friction coefficient material layer. The composite structure consists of the transparent resin base with convex portions for light reflection and the low friction material (such as fluorine-containing resin or silicone resin) coating on the inclined surfaces, achieving both high reflection performance and scratch resistance.
2Reliability
If the friction coefficient is reduced to prevent scratching, then scratch resistance is improved, but light reflection efficiency may be affected
Solution Approach 1:
The patent applies local quality by introducing the low friction coefficient layer only on the inclined surfaces of the convex-shaped portions where scratching occurs, rather than on the entire screen surface. This localized application prevents scratching on the critical reflection surfaces while minimizing impact on overall light reflection efficiency, as the low friction layer is transparent and maintains 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 design improves scratch resistance and maintains high contrast and reflectivity, preventing peeling of the reflecting layer even after 1000 strokes of scratching, while maintaining effective light absorption and transmittance.
Implementation Method 1
a reflecting layer, being formed on the one of the pair of surfaces and reflecting light
Implementation Method 2
the reflecting layer has a low friction portion with lower friction coefficient than that of a reflecting portion being dispersed over within the reflecting portion
Data Source
AI summary
A reflection type screen including: a base portion which is tabular; and a plurality of prism portions which are provided on one surface of the base portion, extending in one direction and lined up in a direction intersecting the one direction, wherein the plurality of prism portions each have: a pair of surfaces, at least one of the pair of surfaces being inclined with respect to the normal direction of the one surface of the base portion and intersecting the other of the pair of surfaces; and a reflecting layer, being formed on the one of the pair of surfaces and reflecting light, and wherein the reflecting layer includes a low friction portion dispersed over within a reflecting portion to reflect light, having lower friction coefficient than that of the reflecting portion.