LED Module Fluorescent Layer Segmentation for White Light Color Rendering
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Solution Overview
Problem
Current LED lighting systems face limitations in color rendering efficiency, particularly when attempting to produce white light using blue light LED chips with mixed fluorescent layers, which can decrease the overall light quality.
Innovation Solution
The proposed lighting apparatus incorporates a combination of first and second LED chips, each covered by different fluorescent layers (red and green) within a package frame, with a driver controlling the output intensities to generate a mixed light. This setup includes separate connections and adjusting circuits for each LED module, allowing for optimized color rendering by adjusting the output of red, blue, and green lights to achieve desired color temperatures and parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If blue light LED chips with mixed fluorescent layers are used to produce white light, then energy efficiency is improved, but color rendering quality deteriorates
Solution Approach 1:
The patent divides the fluorescent layer into separate red and green fluorescent layers instead of using a single mixed fluorescent layer. This segmentation allows independent optimization of each color component, improving color rendering quality while maintaining energy efficiency of the blue LED chip excitation source.
Solution Approach 2:
The patent applies different fluorescent materials with specific properties to different locations (red fluorescent layer and green fluorescent layer) to achieve optimal color rendering in different spectral regions. Each layer is positioned and configured to emit specific wavelengths, creating locally optimized light quality that combines to produce superior overall color rendering.
2Adaptability or versatility
If multiple LED chips with different fluorescent layers are used, then color rendering flexibility is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple LED chips (first LED chip with red fluorescent layer, second LED chip with green fluorescent layer, and third LED chip with blue fluorescent layer) into a single integrated lighting apparatus. This merging approach achieves versatile color rendering capabilities while consolidating control functions, thereby managing device complexity through unified design rather than separate independent systems.
Solution Approach 2:
The driver circuit is designed to control multiple LED chips with different fluorescent layers using a universal control architecture. The driver can adjust output intensities of red, green, and blue lights independently or in combination, providing multi-functional color rendering capabilities (warm white, cool white, tunable colors) through a single integrated control system rather than requiring separate control circuits for each LED type.
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
This configuration enhances color rendering capabilities and flexibility, allowing for tailored light output to suit various object types, improving the overall light quality and efficiency by isolating fluorescent layers and using reflective structures to enhance light distribution.
Implementation Method 1
a first fluorescent layer covering the first area, a second fluorescent layer covering the second LED chip. The first fluorescent layer and the second fluorescent layer have different types of fluorescent materials.
Data Source
Figure 1~2b
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AI summary
A lighting apparatus includes a LED module (661) and a driver (669). The LED module includes a first LED chip (662), a second LED chip (663), a first fluorescent layer (664), a second fluorescent layer (665) and a package frame (6610). The first LED chip and the second LED chip are respectively disposed at a first area (6612) and a second area (6611) of the package frame. The first fluorescent layer covers the first area. The second fluorescent layer covers the second area. The first fluorescent layer and the second fluorescent layer have different types of fluorescent materials. The driver (669) generates a driving current (6613) supplied to the LED module (661) so that the LED module emits a first light (6615) above the first area and a second light (6614) above the second area for generating a mixed light (6616) from the first light and the second light.