Veneer Lighting Structure With Reflective Layer for Higher Transmittance
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Solution Overview
Problem
Conventional lighting devices with a veneer-covered LED light source suffer from reduced transmittance and light extraction efficiency due to the light being absorbed by the display layer.
Innovation Solution
A lighting device design featuring a semi-transmissive surface layer with openings and a reflective member between the light source and the surface layer to reflect light back towards the source, enhancing light extraction efficiency and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light source is covered by the display layer of the veneer, then the characters and patterns can be visually recognized through the veneer, but the transmittance is reduced
Solution Approach 1:
The display layer is designed with a porous structure containing multiple pores that allow light to pass through. This porous configuration enables both the visual recognition of characters and patterns and maintains sufficient light transmittance, resolving the contradiction between these two requirements
Solution Approach 2:
The display layer has different optical properties in different regions - the porous regions allow light transmission while the matrix structure provides the display function. This local differentiation of properties enables simultaneous achievement of visual recognition and light transmittance
2Measurement precision
If the light source is covered by the display layer, then the veneer can display characters and patterns, but the light extraction efficiency is reduced
Solution Approach 1:
A reflective layer is introduced as an intermediary between the light source and the display layer. This reflective layer redirects light that would otherwise be absorbed by the display layer back toward the light source or toward the observer, improving light extraction efficiency while maintaining the display function
Solution Approach 2:
The display layer, which initially absorbs light and reduces extraction efficiency, is converted into a beneficial element by introducing the reflective layer behind it. The reflective layer bounces absorbed light back through the porous display layer, transforming the harmful absorption into beneficial multiple light paths that enhance overall light extraction
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
Improves light extraction efficiency and overall brightness by reflecting absorbed light back towards the surface layer, resulting in higher transmittance and brighter illumination.
Implementation Method 1
a first reflective member provided between the light source and the surface layer to reflect light emitted from the light source toward the light source
Data Source
AI summary
According to an aspect, a lighting device includes: a light source; a surface layer provided at a position facing the light source; and a first reflective member provided between the light source and the surface layer to reflect light emitted from the light source toward the light source. The surface layer has a semi-transmissive layer and a plurality of first openings formed in the semi-transmissive layer. The first reflective member has a plurality of second openings.