Composite Transparent Lighting Device with Perimeter Scattering
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Solution Overview
Problem
Existing transparent lighting solutions for building windows and similar applications either compromise transparency with complex and expensive materials or suffer from non-uniform illumination and glare issues when attempting to provide ambient lighting.
Innovation Solution
A composite transparent lighting device featuring a transparent element with a uniform dispersion of dielectric particles and a reflective frame covering at least 80% of its perimeter, which maintains high transparency during the day and provides excellent, glare-free lighting at night through discrete light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If scattering particles are concentrated in the central part of the window to provide luminous output, then lighting quality is improved, but window transparency and uniformity are affected
Solution Approach 1:
The patent applies local quality by placing scattering particles exclusively at the perimeter of the transparent element rather than uniformly distributing them. The discrete light sources are positioned at the perimeter and optically coupled with the transparent element, creating a localized scattering region that provides illumination while preserving central transparency. This resolves the contradiction by concentrating scattering functionality where it is needed for lighting without compromising the overall transparency of the window surface.
2Illumination intensity
If organic light emitting elements are interposed in the incoming solar radiation path to provide ambient illumination, then lighting function is achieved, but window transparency is negatively impacted and complexity increases
Solution Approach 1:
The patent extracts the scattering function from the bulk transparent material and relocates it to the perimeter region. By positioning discrete light sources and scattering particles at the boundaries rather than throughout the entire window structure, the solution simplifies the overall device architecture while maintaining the ambient illumination function. This eliminates the need for complex organic light emitting elements embedded in the solar radiation path.
3Illumination intensity
If a uniform phosphor content at high concentration is used in photo-luminescent sheets, then lighting output is improved, but sheet transparency is compromised
Solution Approach 1:
The patent segments the transparent element into distinct functional regions: a perimeter region containing discrete light sources and scattering particles, and a central region that remains transparent. This segmentation allows the perimeter zone to provide concentrated lighting output through high-concentration scattering materials while the central zone maintains transparency, effectively resolving the contradiction between lighting intensity and transparency that plagues uniform phosphor sheets.
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 ensures uniform transparency and high-quality, diffused lighting without visible glares or sparkles, achieved by optimizing the concentration and distribution of dielectric particles and using a reflective frame to direct light effectively.
Implementation Method 1
The transparent element is characterized in that: a. said transparent element comprises a transparent matrix with a uniform dispersion of dielectric particles
Implementation Method 2
a reflective frame defining the boundaries of the composite transparent lighting device. Said reflective frame covers at least 80% of the composite transparent lighting device perimeter
Data Source
AI summary
A composite transparent lighting device is described. The device has a transparent substrate, an uniform distribution of low concentration dielectric particles, reflective perimeter and perimetral discrete light sources, of improved appearance both in the inoperative state of the device, and at the same time capable of providing good quality lighting when the device is active, i.e. when the discrete light sources on the perimeter of the device are turned on.