Angle-Selective Sun Protection Device for Facades
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sun protection devices for facades, such as glazing, often fail to provide angle-selective transmission of solar radiation without moving parts, leading to inadequate glare protection and overheating in office spaces.
Innovation Solution
A sun protection device comprising a first structural layer made of an optically opaque or partially translucent material and a second structural layer with light passage and opaque areas, where the two layers are fixedly connected with an intermediate optically transparent dielectric layer, allowing angle-selective transmission by blocking or weakening solar radiation within specific angular ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fixed or movable curtains or horizontal metal rods are used for sun protection, then sun protection is provided, but angle-selective transmission of solar radiation is not achieved and glare protection is inadequate
Solution Approach 1:
The sun protection device is segmented into multiple structural layers (first structural layer, second structural layer) with distinct functions. Each layer contains light passage openings and opaque areas arranged in specific patterns, allowing different angular ranges of solar radiation to be selectively blocked or transmitted through the combined effect of multiple segments
Solution Approach 2:
Different regions of the structural layers have different optical properties. The opaque areas and light passage openings are strategically positioned to create angle-selective transmission characteristics, where specific angular ranges of incident solar radiation are blocked while others are transmitted, providing localized sun protection and glare control
2Object-affected harmful factors
If glazing with screen-printed pattern or thin-film solar cells is used, then sun protection function is provided, but angle-selective transmission of solar radiation is not possible
Solution Approach 1:
The device divides the glazing surface into multiple structural layers with light passage openings and opaque areas. This segmentation allows different angular ranges to be handled by different regions of the structure, enabling angle-selective transmission while maintaining overall sun protection function
Solution Approach 2:
The invention adds a dimensional aspect to traditional 2D screen-printed patterns by creating a multi-layered 3D structure. The light passage openings and opaque areas are arranged in specific spatial configurations across multiple layers, enabling angle-selective transmission properties that cannot be achieved with flat 2D patterns alone
3Illumination intensity
If more glazed surfaces are used in facade construction, then daylight illumination is improved, but overheating of office space occurs
Solution Approach 1:
The structural layers are designed with specific patterns of light passage openings and opaque areas that allow diffuse daylight to pass through while blocking direct solar radiation at certain angles. This creates local quality differences in light transmission, permitting illumination without the harmful thermal effects of direct sunlight
Solution Approach 2:
The device converts the potentially harmful direct solar radiation into beneficial diffuse daylight transmission. By blocking direct beams at specific angles while allowing other light paths, it transforms the glare and heat problem into an opportunity for comfortable, evenly distributed natural lighting
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
This solution achieves effective sun protection, transparency, and anti-glare effects without moving parts, ensuring unhindered views while blocking or weakening solar radiation, thus addressing overheating issues in office spaces.
Implementation Method 1
an optically transparent dielectric, i. H. optically refractive layer or layer sequence, of at least approximately constant thickness
Implementation Method 2
A material that is only partially translucent is understood to mean a transparent or translucent material with which the structural layer in the selected layer thickness has a light transmittance of ≦40%, preferably ≦10%, particularly preferably ≦3%, for the incident radiation. This is achieved by choosing a material that reflects and/or absorbs a sufficient percentage of the incident radiation.
Implementation Method 3
This is achieved by choosing a material that reflects and/or absorbs a sufficient percentage of the incident radiation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a sun protection device from at least one optically transparent dielectric layer (1, 7) which is connected on either side with a structural layer (5, 6) from an opaque or only partially translucent material. The two structural layers (5, 6) are structured in such a manner, and while forming light passage openings (14) and light-impermeable zones (12, 13), that optical radiation which is incident on the outer structural layer (6) within a predetermined angular range is blocked by the interaction of the two structural layers (5, 6) and a portion of the optical radiation which is incident on the second structural layer (6) within a different angular range may pass the structural layers (5, 6) without being blocked. The sun protection device allows an angle-selective transmission of solar radiation, thereby achieving an antiglare effect and at the same time allowing vision in a downward direction.