Spiral Phosphor Cover for Lighting Device
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Solution Overview
Problem
Current lighting devices with phosphor covers lack efficient light conversion and distribution, leading to suboptimal color rendering and light directivity, particularly when using single-layer phosphor configurations.
Innovation Solution
A phosphor cover with a spiral surface design, incorporating multiple phosphor layers and a light-reflection layer that are spiraled together, and a method of manufacturing this cover by rolling up phosphor films to form spiral surfaces, which are then arranged above a light source to enhance light conversion and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer phosphor cover is used, then the device complexity is low, but the color rendering and light directivity are suboptimal
Solution Approach 1:
The phosphor cover is divided into multiple layers, each containing phosphor particles with different characteristics. This segmentation allows each layer to contribute differently to light conversion, improving overall color rendering and light directivity while managing complexity through modular layering
Solution Approach 2:
The patent transitions from a single-layer (2D) phosphor cover to a multi-layer (3D) structure with varying thicknesses. This dimensional change enables spatial optimization of light conversion paths, allowing different phosphor layers to convert light at different depths and angles, thereby improving color rendering and directivity
2Illumination intensity
If multiple phosphor layers are added to improve light conversion, then color rendering improves, but the device complexity increases
Solution Approach 1:
Each phosphor layer is designed with locally optimized properties, including specific phosphor particle types, concentrations, and layer thicknesses tailored to their position in the stack. This allows each layer to perform its specific light conversion function efficiently while contributing to the overall color rendering improvement without uniformly increasing complexity throughout the entire structure
3Use of energy by moving object
If phosphor layers are arranged closely to improve light conversion efficiency, then energy use improves, but adjacent phosphor layers interfere with each other
Solution Approach 1:
The patent employs partial spacing between phosphor layers, where the gaps are sufficient to prevent harmful interference (excessive action) but not so large as to significantly reduce light conversion efficiency (partial action). This optimized spacing allows each phosphor layer to operate effectively while minimizing cross-interference, achieving a balance between energy efficiency and interference suppression
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 spiral phosphor cover design improves light directivity and color rendering by effectively recycling light and suppressing the influence of adjacent phosphor layers, resulting in better light output and color properties compared to single-layer configurations.
Implementation Method 1
a phosphor cover includes a phosphor layer with a spiral surface... a phosphor cover includes a phosphor layer and a light-reflection layer that is arranged on the phosphor layer... the phosphor cover includes a first phosphor layer and a second phosphor layer that are layered
Implementation Method 2
a light-reflection layer that is arranged on the phosphor layer, and the light-reflection layer and the phosphor layer are spiraled around each other
Data Source
AI summary
In a first aspect of the present inventive subject matter, a lighting device includes a light source including a light-emitting surface, and a phosphor cover including a spiral surface that covers the light-emitting surface of the light source. In a second aspect of the present inventive subject matter, a phosphor cover including a spiral surface may include one or more layers. In a third aspect of the present inventive subject matter, a method manufacturing a lighting device includes: rolling up a phosphor film from one end to another end to form a roll with spiral surfaces both ends of the roll of the phosphor film.