Lighting System with Diffused Light Generator for Sunlight Imitation
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Solution Overview
Problem
Existing artificial lighting systems fail to effectively mimic natural sunlight illumination, particularly in terms of light shadow transitions and directionality, leading to an unnatural impression when installed in ceilings or walls.
Innovation Solution
The proposed lighting system incorporates a light source with directed non-diffused light and a lamp shade-like structure featuring a diffused light generator and a screen structure, which modifies the light beam's directionality and creates contrast lines to simulate sunlight by providing both direct and diffused light components, enhancing the sunlight imitation effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If existing artificial lighting systems are used, then lighting is provided in closed environments, but they fail to effectively mimic natural sunlight illumination and create unnatural impressions
Solution Approach 1:
The lighting system is segmented into multiple functional components: a light source for directed non-diffused light, a diffused light generator for scattered light, and a screen structure. This segmentation allows each component to fulfill a specific function in mimicking sunlight characteristics, with the directed light providing shadow transitions and the diffused light providing ambient illumination, thereby achieving natural sunlight imitation while maintaining lighting reliability
Solution Approach 2:
Different regions of the lighting system provide different light qualities: the directed non-diffused light from the light source creates sharp shadow transitions similar to sunlight, while the diffused light from the diffused light generator provides soft ambient illumination. This local differentiation of light quality enables the system to simultaneously achieve natural sunlight imitation and consistent reliable illumination throughout the space
2Illumination intensity
If a lamp shade-like structure with screen structure is added to modify light directionality, then sunlight imitation is improved, but device complexity increases
Solution Approach 1:
The screen structure serves multiple functions simultaneously: it acts as a support for the diffused light generator, defines the light passage geometry, and contributes to the overall lamp shade-like aesthetic. The bottom unit both generates diffused light and provides structural support. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved light directionality and shadow transitions for better sunlight imitation
3Illumination intensity
If diffused light generator is added with larger correlated color temperature, then natural sunlight imitation is enhanced, but energy use increases
Solution Approach 1:
The diffused light generator provides only the diffused light component necessary for natural sunlight imitation, rather than attempting to replicate the entire sunlight spectrum through a single source. By using a light source with lower correlated color temperature for directed light and adding only the necessary diffused light with larger correlated color temperature, the system achieves enhanced natural sunlight imitation while avoiding the excessive energy consumption that would result from using high correlated color temperature sources for all lighting functions
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 system achieves a more natural sunlight imitation by creating shadow transitions and directionality, improving the visual comfort and perception of sunlight in closed environments, while also allowing for a more compact configuration and increased top-down illumination.
Implementation Method 1
the bottom unit comprises a diffused light generator for generating diffused light at a second correlated color temperature, which is larger than the first correlated color temperature, is at least partially transparent for the directed non-diffused light of the light beam
Implementation Method 2
the screen structure is spatially oriented with respect to the main light beam direction of the divergent light beam portion to be illuminated by at least a part of the divergent light beam portion, thereby providing an illuminated screen section acting as a scattered light source
Implementation Method 3
a propagation direction of the directed non-diffused light is modified across the light beam and is essentially parallel to the main light beam direction in an inner area and is increasingly inclined with increasing distance from the inner area
Data Source
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Figure 3
Figure 4~6
AI summary
A lighting system (1) comprises a light source (2) for providing a light beam (3) of directed non-diffused light with a first correlated color temperature along a main light beam direction (4), wherein a propagation direction of the directed non-diffused light is modified across the light beam (3) and is essentially parallel to the main light beam direction (4) in an inner area and is increasingly inclined with respect to the main light beam direction (4) with increasing distance from the inner area; and a lamp shade-like structure (10) comprising a bottom unit (12) to be illuminated from the light source (2) at one side and a screen structure (14) provided at an opposite side, the bottom unit (12) and the screen structure (14) defining a light passage (46). The bottom unit (12) comprises a diffused light generator (20) for generating diffused light at a second correlated color temperature, which is larger than the first correlated color temperature, is at least partially transparent for the directed non-diffused light of the light beam (3), and is configured such that at least a divergent light beam portion (53) of the light beam (3) enters the light passage (46); and the screen structure (14) is spatially oriented with respect to the main light beam direction (54) of the divergent light beam portion (53) to be illuminated by at least a part of the divergent light beam portion (53), thereby providing an illuminated screen section (394, 395) acting as a scattered light source. Moreover, lighting systems with tilted diffused light generators (20) and specific arrangements of pluralities of lighting systems (1) are disclosed.