Facade Daylighting Film and Light Duct for Deep Interior Lighting
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Solution Overview
Problem
Existing daylighting systems for buildings face challenges such as the need for expensive mechanical tracking systems, bulky collector elements, and integration issues that disrupt thermal insulation and architectural aesthetics, particularly when transporting light over long distances.
Innovation Solution
A daylight illumination system using a translucent glass facade element with a light redirection film or sheet integrated into a mirror-lined duct, allowing for efficient light collection and transport without protruding parts, maintaining thermal insulation and aesthetic integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lighting fixtures with opaque housings and covers are used, then device structure is simple and manufacturing is easy, but light transmission is blocked and illumination intensity is reduced
Solution Approach 1:
The patent removes traditional opaque housing and cover components from the lighting fixture, extracting only the essential light-transmitting elements (LED modules and diffusers) to enable maximum light transmission while simplifying the overall structure
Solution Approach 2:
The patent employs thin, translucent diffuser films instead of bulky opaque housings. These thin films allow light to pass through effectively while providing minimal structural enclosure, thus improving illumination intensity without significantly increasing device complexity
2Illumination intensity
If artificial lighting is used during daytime, then illumination intensity is sufficient, but energy consumption increases and circadian rhythms are disrupted
Solution Approach 1:
The lighting system dynamically adjusts its operation based on ambient light conditions and time of day. During daytime, the system reduces or eliminates artificial lighting when natural light suffices, while providing supplemental illumination only when and where needed, thereby optimizing energy consumption while maintaining adequate illumination
Solution Approach 2:
The system incorporates sensors and control logic that monitor ambient light levels and automatically adjust artificial lighting output. This feedback mechanism ensures artificial lighting is used only when necessary to supplement natural light, preventing unnecessary energy consumption while maintaining required illumination levels
3Adaptability or versatility
If conventional opaque lighting fixtures are used, then device structure is simple, but circadian rhythm support is lacking and light quality is poor
Solution Approach 1:
The lighting fixture is designed to perform multiple functions: providing general illumination, supporting circadian rhythms through spectral control, and adapting to different usage scenarios. By integrating可调able LED modules that can emit different wavelengths, the single fixture delivers diverse light qualities without requiring multiple separate devices, thus improving adaptability while keeping overall system complexity manageable
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 effectively collects and redirects light into a mirror-lined duct, enhancing light quality and distribution within buildings while preserving thermal insulation and architectural aesthetics, without the need for expensive optical elements or mechanical tracking.
Implementation Method 1
a light emitting diode (LED) module
Implementation Method 2
Each LED module can include a diffuser
Data Source
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AI summary
A daylight illumination system for integration into a building or larger vehicle comprises a translucent facade element (800) containing a glass sheet and a light redirection element (302 or 708), and a light transport channel (801) for guiding light about horizontally into an interior of the building, the light transport channel comprising one opening attached to the interior side of said facade element and at least one opening towards the interior of the building, characterised in that the light redirection element (302 or 708) is formed as a structured polymer film or sheet attached to a glass sheet of the facade element (800) and is configured for changing the direction of incident light into the about horizontal light transport channel.