Polycarbonate Roofing with Bump Arrays for Light Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current roofing materials, such as glass and transparent plastics, are inadequate for buildings as they fail to effectively utilize natural light for illumination and are not robust enough to handle external environmental conditions like rain and UV exposure.
Innovation Solution
A multifunctional roofing material featuring a polycarbonate layer with alternating convex and concave portions and a two-dimensional array of bumps for enhanced light diffusion, combined with a coating layer that blocks or absorbs UV and IR rays, providing improved illumination, reduced noise from rain, and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If glass windows are installed at lateral sides of a building to receive natural light, then illumination of the building is improved, but it is difficult to receive natural light through the glass windows due to their lateral installation position
Solution Approach 1:
The patent transitions from lateral light reception (windows on sides) to overhead light reception (roofing material), utilizing the vertical dimension above the building to maximize natural light intake for interior illumination
2Illumination intensity
If transparent roofing materials such as fiber reinforced plastics or polycarbonate are used, then light transmission is improved, but they are not sufficient to cope with external environments such as natural light and rain water
Solution Approach 1:
The patent employs a composite structure combining polycarbonate base material with multiple functional coating layers (UV-blocking coating, hydrophobic coating) to achieve both high light transmission and superior environmental resistance simultaneously
3Strength
If conventional roofing materials are used, then structural integrity is maintained, but they fail to effectively utilize natural light for illumination
Solution Approach 1:
The patent applies local quality enhancement by adding specific functional coatings (UV-blocking, hydrophobic) to specific areas of the polycarbonate roofing material, optimizing both structural integrity and light utilization properties where needed
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 solution maximizes light diffusion for interior illumination, reduces dazzling and noise from rain, and maintains a comfortable internal environment by effectively managing external environmental factors like natural light and precipitation.
Implementation Method 1
a convex portion and a concave portion are alternately repeated in order to diffuse light incident on the roofing material
Implementation Method 2
a two-dimensional array of a plurality of bumps for diffusing light incident on the roofing material, is formed on a surface of each convex portion and a surface of each concave portion of the polycarbonate layer
Implementation Method 3
a coating layer that is coated on the two-dimensional array of the bumps and blocks or absorbs an ultraviolet ray included in light incident on the roofing material
Implementation Method 4
The coating layer may block or absorb an infrared ray included in light incident on the roofing material at the same time when blocking or absorbing the ultraviolet ray
Data Source
AI summary
A roofing material including: a polycarbonate layer which is a polycarbonate panel having a predetermined thickness and in which a convex portion and a concave portion are alternately repeated in order to diffuse light incident on the roofing material, wherein a two-dimensional array of a plurality of bumps for diffusing light incident on the roofing material, is formed on a surface of each convex portion and a surface of each concave portion of the polycarbonate layer.