Diffuser with Asymmetric Light Transmission for Realistic Skylight Simulation
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Solution Overview
Problem
Existing lighting apparatuses fail to create a realistic artificial scenery resembling natural sunlight, especially when a blue sky is not visible and no actual sunlight is present, leading to an unnatural observer experience.
Innovation Solution
A diffuser system with a light incident surface and multiple light transmitting surfaces that scatter and transmit light, increasing intensity and altering correlated color temperature to mimic the effect of sunlight, using a transparent resin and scattering particles to create a realistic blue sky effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lighting panels are used to simulate skylight, then the lighting apparatus can provide illumination, but the brightness and color appear unnatural and do not resemble actual sunlight or blue sky
Solution Approach 1:
The lighting panel is divided into multiple independently controllable regions including a sunlit portion and a shadow portion, each capable of displaying different brightness and color characteristics to realistically simulate the complex optical phenomena of actual skylight and sunlight interaction
Solution Approach 2:
Different regions of the lighting panel are assigned different optical properties and control characteristics - the sunlit portion emits warmer light with higher intensity to simulate direct sunlight, while the shadow portion provides cooler, diffused light to simulate shaded areas, creating a natural gradient effect
2Device complexity
If uniform light transmission is used in the diffuser, then the structure is simple, but the correlated color temperature cannot be differentiated to create realistic sunlight effects
Solution Approach 1:
The diffuser is designed with asymmetric light transmission characteristics - the first light transmitting surface transmits light with higher correlated color temperature while the second light transmitting surface transmits light with lower correlated color temperature, creating a natural color gradient that mimics the effect of sunlight passing through different atmospheric paths
Solution Approach 2:
The diffuser utilizes variations in light transmission parameters across different surfaces and angles, where the intensity of transmitted light increases as the emergence direction approaches the incident direction, and correlated color temperature varies between different transmitting surfaces to simulate natural sunlight effects
3Reliability
If the lighting panel attempts to reproduce all aspects of natural sunlight, then the observer experience improves, but the device complexity and control requirements increase significantly
Solution Approach 1:
Different regions of the lighting panel are assigned different optical properties and control characteristics - the sunlit portion emits warmer light with higher intensity to simulate direct sunlight, while the shadow portion provides cooler, diffused light to simulate shaded areas, creating a natural gradient effect without requiring complex control of the entire panel
Solution Approach 2:
The lighting panel is divided into multiple independently controllable regions including a sunlit portion and a shadow portion, each capable of displaying different brightness and color characteristics to realistically simulate the complex optical phenomena of actual skylight and sunlight interaction
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 diffuser system effectively provides a realistic artificial scenery as if illuminated by sunlight, replicating the luminance and color changes observed in a natural blue sky, even in environments without actual sunlight, enhancing the observer's experience.
Implementation Method 1
a diffuser on which first light is incident and from which light including scattered light emerges
Implementation Method 2
first transmitted light emerges from the first light transmitting surface, second transmitted light emerges from second light transmitting surface
Data Source
AI summary
First light is incident on a diffuser, and scattered light emerges from the diffuser. The diffuser includes one light incident surface on which the first light is incident in a first direction and a first light transmitting surface. The light incident surface is formed on an end surface of the diffuser. First transmitted light emerges from the first light transmitting surface. Second transmitted light emerges from second light transmitting surface that is a surface other than the first light transmitting surface of the diffuser. Intensity of the first transmitted light increases as a direction in which the first transmitted light emerges approaches the first direction. Correlated color temperature of the first light is lower than correlated color temperature of the first transmitted light and higher than correlated color temperature of the second transmitted light.