Defect-Hiding Surface Textures for Grazing-Light Construction Panels
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Solution Overview
Problem
Construction surfaces, such as drywall and ceiling tiles, often exhibit small imperfections that are visible under certain lighting conditions, particularly when viewed from shallow angles, requiring significant time and expertise to conceal.
Innovation Solution
A construction product with a visible surface featuring small surface features that have a rotational derivative no greater than 1.2 times that of a Lambertian surface, reducing light intensity variations across different viewing angles to hide defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the construction surface is made perfectly smooth, then the visibility of surface defects is reduced, but the installation time and skill requirement increase significantly
Solution Approach 1:
The defect-hiding texture is applied to the construction product surface before installation, preliminarily preparing the surface to conceal defects that may occur during installation. This preliminary action eliminates the need for post-installation smoothing operations, reducing both installation time and skill requirements while maintaining defect concealment
Solution Approach 2:
The invention changes the surface parameter by introducing a specific texture with controlled rotational derivative properties. This parameter change transforms the surface from a smooth, defect-revealing state to a textured, defect-concealing state, allowing defects to be hidden without requiring excessive smoothing operations
2Object-affected harmful factors
If the construction surface is made perfectly smooth, then the visibility of surface defects is reduced, but the skill requirement for installation increases
Solution Approach 1:
The defect-hiding texture is pre-applied to the construction product, preliminarily establishing a surface that conceals defects. This preliminary action removes the burden of achieving perfect smoothness during installation, making the installation process easier and less skill-intensive
Solution Approach 2:
By changing the surface parameter to include a specific texture with controlled rotational derivative, the invention makes the surface inherently defect-hiding. This parameter change eliminates the need for highly skilled smoothing operations, improving ease of operation
3Object-affected harmful factors
If a texture is applied to the construction surface, then the visibility of surface defects is reduced, but the surface finish quality changes
Solution Approach 1:
The invention carefully controls the texture parameters, specifically the rotational derivative, to ensure the texture is subtle enough not to significantly alter the perceived surface finish quality while being sufficient to hide defects. This controlled parameter change achieves defect concealment with minimal impact on aesthetic appearance
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 surface effectively conceals imperfections by minimizing changes in light intensity, making defects less noticeable even under grazing lighting conditions.
Implementation Method 1
a visible surface having a first rotational derivative that is no greater than 1.2*a respective rotational derivative of a Lambertian surface under the same lighting and viewing conditions
Implementation Method 2
the rotational derivative is the percentage change in radiance from the visible surface in a viewing direction when illuminated from an illumination direction
Data Source
AI summary
The present disclosure relates generally to a surface structure for construction products, for example, suitable for construction products that cover visible interior surfaces, such as drywall and ceiling panels. The present disclosure relates more particularly to an interior surface construction product including a visible surface covered with a texture including surface features having a height in a range from 20 μm to 2500 μm. The visible surface has an average rotational derivative that is no greater than 1.2*a respective rotational derivative of a Lambertian surface under the same lighting and viewing conditions. The rotational derivative is the percentage change in radiance from the visible surface in a viewing direction when illuminated in an illumination direction as the surface rotates about an axis that is perpendicular to a plane defined by the viewing direction and the illumination direction.