Artificial Lighting System for Natural Depth Perception
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Solution Overview
Problem
Current artificial lighting systems that simulate natural lighting fail to accurately recreate the visual perception of unlimited depth of field, as they often result in objects appearing to be at infinite distance due to blinding light sources and lack of reference points, inhibiting the observer's ability to estimate distances accurately.
Innovation Solution
The proposed lighting system incorporates a directional light source and a Rayleigh diffuser panel, positioned to create a uniform and diffused light environment, with a dark box structure to absorb excess light, allowing the panel to act as a secondary luminous source that mimics skylight, enhancing the aerial perspective mechanism and maintaining a natural depth perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a directional light source is used to simulate sunlight, then direct light with low CCT is generated, but the light source creates blinding effects that prevent accurate distance estimation
Solution Approach 1:
A dark box structure is introduced as an intermediary between the light source and the observation space. This dark box absorbs excess direct light and prevents blinding effects, allowing the directional light source to maintain its sunlight-like characteristics while eliminating the harmful visual overload that prevents accurate distance estimation.
Solution Approach 2:
The lighting system is segmented into distinct functional zones: a dark box containing the directional light source, a Rayleigh diffuser panel, and an observation space. This segmentation isolates the intense direct light within the dark box while allowing only diffused light to reach observers, resolving the contradiction between maintaining high illumination intensity and preventing visual discomfort.
2Length of stationary object
If the light source is positioned close to the diffuser panel, then the system occupies less vertical space, but the light becomes less uniform and creates hot spots
Solution Approach 1:
The light uniformity problem is solved by transitioning from a one-dimensional proximity relationship to a two-dimensional angular relationship. The dark box confines the light source at a fixed distance while the Rayleigh diffuser panel distributes light across multiple angles, creating uniform illumination without requiring increased vertical separation.
Solution Approach 2:
The system changes the key parameter from distance to angle. By maintaining a fixed distance within the dark box and utilizing the angular scattering properties of the Rayleigh diffuser panel, the system achieves uniform light distribution without needing to increase the vertical distance between components.
3Illumination intensity
If a Rayleigh diffuser panel is used to simulate skylight, then diffused light with high CCT is generated, but the panel requires a dark box structure that increases device complexity
Solution Approach 1:
The dark box structure serves multiple functions simultaneously: it provides the necessary dark environment for Rayleigh scattering to occur, absorbs excess direct light to prevent blinding, defines the geometric relationship between light source and diffuser, and contains the entire lighting mechanism within a compact form factor. This multi-functionality justifies the structural complexity by eliminating the need for separate components.
4Measurement precision
If the dark box absorbs excess light, then distance estimation is improved, but light loss increases
Solution Approach 1:
The dark box extracts only the necessary amount of excess light that would otherwise cause blinding and interfere with distance estimation. By carefully designing the box geometry and absorption properties, the system removes only what is harmful while allowing sufficient light to pass through the Rayleigh diffuser panel to maintain effective illumination and enable accurate depth perception.
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 setup effectively creates a natural lighting effect with improved depth perception, allowing observers to accurately assess distances and maintain a sense of space, while minimizing the system's vertical encumbrance and maintaining the quality of illumination.
Implementation Method 1
a panel containing nanoparticles. When in use, the panel receives light rays coming from the source and acts as a so-called Rayleigh diffuser, namely it diffuses light rays similarly to the Earth's atmosphere in clear-sky conditions
Implementation Method 2
with a dark box structure to absorb excess light
Implementation Method 3
such lighting system does not lead an observer to experience the visual perception of unlimited depth of field... generates, inside the surrounding environment, direct light with low Correlated Color Temperature ('CCT'), which mimics sunlight and generates shadows
Implementation Method 4
the lighting system described in patent application EP2304480 simulates natural lighting in that it casts diffused light with high CCT, which mimics skylight and generates shadows with a blue tinge
Data Source
AI summary
A lighting system for illuminating an environment with a lighting that simulates natural lighting, which includes: a first light source which emits a beam of visible light; a diffused-light generator delimited by an inner surface, which receives the light beam, and an outer surface, the diffused-light generator being at least partially transparent to the light beam. The diffused-light generator transmits at least part of the light beam and emits, through the outer surface, visible diffused light, the correlated color temperature of the transmitted light being lower than the CCT of the visible diffused light. The lighting system includes a dark structure which is optically coupled to the environment via the diffused-light generator and provides a substantially uniform background to the first light source.