Patterned Phosphor Lighting Structure for 3D Luminance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle lighting devices using phosphor layers for pattern formation face issues with light efficiency due to variations in phosphor layer thickness, which affect light diffusion and aesthetics when concave or protruding patterns are created.
Innovation Solution
A lighting device design featuring a substrate with light sources, a resin layer, a phosphor layer, and a diffusion layer with varying thickness and patterns to optimize light emission and maintain aesthetics, where the diffusion layer is strategically placed between the resin and phosphor layers to control light diffusion and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a concave pattern is formed on the surface of the phosphor layer, then a three-dimensional effect and aesthetic sense are created, but the thickness of the phosphor layer decreases and light diffusion is prevented
Solution Approach 1:
The invention divides the phosphor layer into multiple segments: a first phosphor layer with a first pattern and a second phosphor layer with a second pattern. This segmentation allows different regions to have different thicknesses and light diffusion properties, enabling both three-dimensional aesthetic effects and adequate light diffusion in various areas simultaneously.
Solution Approach 2:
Different regions of the phosphor layer are designed with different local properties. The first phosphor layer and second phosphor layer have different thicknesses and pattern configurations, creating local variations in light diffusion and color emission. This allows specific areas to optimize for either aesthetic three-dimensional effects or light diffusion performance.
2Illumination intensity
If a protruding pattern is formed on the surface of the phosphor layer, then light diffusion is improved, but the thickness of the phosphor layer increases and light efficiency is deteriorated
Solution Approach 1:
The phosphor layer is segmented into multiple layers with different thicknesses and patterns. This allows the system to achieve adequate light diffusion without requiring a uniformly thick phosphor layer, thereby maintaining light efficiency by reducing the total phosphor material thickness while still providing diffusion in necessary areas.
Solution Approach 2:
Instead of making the entire phosphor layer thick to achieve light diffusion, the invention applies partial thickening only in specific regions where diffusion is needed, while keeping other regions thinner to maintain overall light efficiency. This selective approach avoids excessive phosphor thickness that would waste energy.
3Illumination intensity
If the phosphor layer thickness is increased to improve light diffusion, then light scattering is enhanced, but the device thickness increases and light efficiency decreases
Solution Approach 1:
The invention segments the phosphor layer into multiple thinner layers rather than using a single thick layer. This segmentation achieves the desired light diffusion effect through cumulative scattering across multiple interfaces while keeping the overall device thickness reduced, as the segmented structure allows for more efficient light propagation paths.
4Shape
If patterns are formed on the phosphor layer surface, then aesthetic appeal is improved, but manufacturing complexity increases due to thickness control requirements
Solution Approach 1:
The invention divides the pattern formation into multiple manufacturing steps, creating a first phosphor layer with a first pattern and a second phosphor layer with a second pattern. This segmentation simplifies each individual manufacturing step, as each layer can be formed with standard thickness control, avoiding the need for complex single-step thickness variations while still achieving the desired aesthetic patterns.
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 enhances light efficiency and maintains a 3D pattern effect while preventing light from being diffused into low-concentration areas, improving the overall luminance and aesthetic appeal of the lighting device without increasing its thickness.
Implementation Method 1
a diffusion layer disposed between the resin layer and the phosphor layer
Implementation Method 2
a phosphor layer disposed on the resin layer and having a pattern layer including concave portions and convex portions on a surface facing the resin layer
Data Source
AI summary
A lighting device disclosed in an embodiment of the invention includes a substrate; a plurality of light sources spaced apart from each other at predetermined intervals on the substrate; a resin layer disposed on the substrate; a phosphor layer disposed on the resin layer and having a pattern layer including a concave portion and a convex portion formed on a surface facing the resin layer; and a diffusion layer disposed between the resin layer and the phosphor layer, wherein a thickness of the diffusion layer may be 10% or more and less than 50% of the maximum thickness of the phosphor layer.