Glazing Unit Optical Element with Perforated Shading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for integrating optical elements in insulated glazing units either compromise the optical path of light or suffer from inefficiencies in solar energy transmittance and maintenance issues, such as with fully laminated solar screens or interior shading devices.
Innovation Solution
A glazing unit with an optical element having a plurality of perforations and a non-perforated area, where the perforations are not filled with adhesive, allowing for selective light transmission based on angle of incidence, and the optical element is attached to the glass panes using an adhesive that covers only a part of the non-perforated area, providing improved shading and reduced heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical element is fully laminated between glass panes, then the optical element is securely fixed and protected, but the adhesive fills the perforations and compromises the optical path and light transmission angles
Solution Approach 1:
The optical element is segmented into a non-perforated area for adhesive application and fixation, and perforated areas for light transmission. The adhesive is applied in a segmented manner only in the non-perforated area, leaving the perforations open to maintain optical path integrity while providing secure fixation in the non-perforated region
Solution Approach 2:
Different areas of the optical element have different properties: the non-perforated area provides structural support and adhesive bonding, while the perforated areas maintain optical transparency and light transmission. The adhesive is locally applied only where structurally necessary, not compromising the optical function
2Illumination intensity
If interior shading devices are used, then light blocking is effective, but thermal effectiveness is poor as solar radiation transforms into heat on the shading device surface
Solution Approach 1:
The solution moves from two-dimensional surface shading (where heat accumulates on the shading device surface) to a three-dimensional approach where the optical element with perforations allows selective light blocking while maintaining thermal effectiveness through the glass panes' inherent thermal properties
3Loss of energy
If exterior shading devices are used, then solar energy transmission is reduced effectively, but maintenance and cleaning requirements increase along with mechanical failures
Solution Approach 1:
The optical element with shading function is merged with the glazing unit itself, becoming an integral part of the window assembly. This combination eliminates the need for separate exterior shading devices that require maintenance, while maintaining the solar energy reduction function
Solution Approach 2:
The glazing unit with integrated optical element provides self-service by incorporating the shading function directly into the window structure, eliminating the need for external maintenance and cleaning operations on separate shading devices
4Loss of energy
If tinted or coated glass panes are used, then radiation reduction is achieved, but the perception of color and light quality is affected
Solution Approach 1:
The optical element is segmented into non-perforated areas for shading and perforated areas for light transmission, allowing selective blocking of solar radiation while maintaining natural light quality and color perception through the perforations, unlike uniform tinting that affects all wavelengths
Solution Approach 2:
The optical element uses a porous/perforated structure to selectively filter solar radiation while allowing visible light to pass through, maintaining color perception quality unlike solid tinted glass that uniformly absorbs light across all wavelengths
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 reduces solar energy transmittance, maintains better optical quality, and eliminates maintenance needs, while allowing for efficient shading of direct solar radiation and neutral color rendering, enhancing energy efficiency and visual appearance.
Implementation Method 1
wherein the optical element is arranged between the two glass panes by means of an adhesive
Implementation Method 2
the perforations have a depth/width ratio that allows for passage of light with given angles of incidence, while light having other angles of incidence are unable to pass though the perforations
Implementation Method 3
the non-perforated area prevents penetration of light in a building where the insulated glazing unit is mounted
Data Source
Figure 1a~1c
Figure 2a~2b
Figure 3a~3f
AI summary
Disclosed is a method for integrating at least one optical element inside an insulated glazing unit comprising at least two glass panes, where the optical element has a plurality of perforations and a non-perforated area, where the non-perforated area prevents penetration of light in a building where the insulated glazing unit is mounted, and where the perforations have a depth/width ratio that allows for passage of light with given angles of incidence, while light having other angles of incidence are unable to pass though the perforations, which provides a shading effect, and wherein the optical element is arranged between the two glass panes by means of an adhesive, and where the adhesive is substantially not present in the perforations of the optical element.