Daylighting Sheet Light Deflection Layer Glare Control
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Solution Overview
Problem
Existing daylighting technologies face challenges in efficiently transmitting outside light into buildings while maintaining clear outdoor visibility and preventing glare, with previous solutions either absorbing too much light or causing image distortion due to refraction.
Innovation Solution
A daylighting sheet composed of stacked layers, including a translucent base material layer and a light deflection layer with aligned light transmission and deflection portions, where the light deflection portions are filled with materials that reflect or scatter light, and optionally include ultraviolet, heat-ray, or near-infrared absorption functions, to efficiently transmit light and enhance outdoor visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shield portion group made of light absorption material is used to control sunlight, then glare is reduced, but outside light transmission efficiency deteriorates
Solution Approach 1:
The patent converts the harmful direct sunlight into beneficial diffused light by using light diffusing particles. Instead of absorbing light and losing it, the light shield portions scatter sunlight in multiple directions, transforming direct glare into useful ambient illumination that evenly distributes light throughout the interior space.
Solution Approach 2:
The patent changes the optical parameters of the light shield portions by incorporating light diffusing particles with specific refractive indices. This transforms the light shield portions from purely absorptive elements to elements that both shield and diffuse light, altering how they interact with sunlight to achieve both glare control and light transmission.
2Ease of operation
If an interface with predetermined geometric configuration and refractive index difference is used to control light, then light deflection is achieved, but image sharpness deteriorates due to refraction
Solution Approach 1:
The patent applies local quality by creating distinct regions with different optical properties. The light diffusing particles are selectively placed in light shield portions rather than uniformly distributed, creating localized light diffusion zones that control glare while preserving clear visibility through light transmission portions.
Solution Approach 2:
The patent segments the sheet into alternating light transmission portions and light shield portions. This segmentation allows different optical functions in different regions: clear light transmission in transmission portions and controlled diffusion in shield portions, achieving both sharp visibility and effective light control.
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 allows for efficient daylighting and clear outdoor visibility from indoors by effectively deflecting and diffusing light, reducing glare and absorption, while also providing comfort through temperature regulation and protection from UV and infrared radiation.
Implementation Method 1
an interface that has a predetermined geometric configuration such as a prism and has a refractive index difference is utilized, and thus control is performed by deflecting and reflecting outside light such as sunlight in a desired direction
Implementation Method 2
control is performed by deflecting and reflecting outside light such as sunlight in a desired direction
Implementation Method 3
a translucent base material layer
Implementation Method 4
light deflection portions that are formed between the light transmission portions and deflect the light reached the light deflection portions
Data Source
AI summary
A daylighting sheet is provided which efficiently performs daylighting and in which, when the daylighting sheet is applied to an opening portion, such as a window of a building, it is possible to see an outdoor side from an indoor side.The daylighting sheet is formed by stacking a plurality of layers, the layers include: a translucent base material layer; and a light deflection layer that is formed on the base material layer, and the light deflection layer includes: light transmission portions that are aligned along one surface of the base material layer so as to be able to transmit light; and light deflection portions that are formed between the light transmission portions and deflect the light reaching the light deflection portions.