LED Module With Different Fluorescent Layers for Color Rendering
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Solution Overview
Problem
Existing LED lighting technologies face challenges in achieving optimal color rendering and flexibility in light output, particularly when using blue light LED chips covered with fluorescent layers that decrease color rendering effects.
Innovation Solution
A lighting apparatus with a LED module comprising first and second LED chips covered by different fluorescent layers, controlled by a driver to emit distinct lights, which are mixed to achieve desired color rendering and flexibility through adjustable intensity and wavelength control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If blue light LED chips are covered with fluorescent layers to render white light, then white light output is achieved, but color rendering effect deteriorates
Solution Approach 1:
The patent divides the LED module into multiple independent light-emitting regions, each with its own LED chip and fluorescent layer configuration. Specifically, it uses multiple blue LED chips (first, second, and third blue LED chips) with different fluorescent layers (first yellow fluorescent layer, second yellow fluorescent layer, and red fluorescent layer) to create distinct light output zones. This segmentation allows each region to contribute differently to the overall color rendering, overcoming the limitation of a single fluorescent layer covering blue LEDs.
Solution Approach 2:
Different regions of the LED module are assigned different fluorescent materials and configurations to achieve local optimization of color rendering. The first and second yellow fluorescent layers convert blue light to yellow light, while the red fluorescent layer converts blue light to red light. By controlling the intensity and wavelength of light from each region independently, the system achieves superior overall color rendering compared to uniform fluorescent coverage.
2Manufacturing precision
If multiple LED chips with different fluorescent layers are used to improve color rendering, then color rendering capability is enhanced, but device complexity increases
Solution Approach 1:
The patent combines multiple LED chips and fluorescent layers into a single integrated LED module structure. The first blue LED chip is combined with the first yellow fluorescent layer, the second blue LED chip with the second yellow fluorescent layer, and the third blue LED chip with the red fluorescent layer, all within one module. This merging approach simplifies the overall system architecture while maintaining enhanced color rendering capabilities, as the module can be treated as a single replaceable unit.
Solution Approach 2:
The LED module is designed to perform multiple functions simultaneously: it generates blue light from LED chips, converts blue light to yellow light through yellow fluorescent layers, converts blue light to red light through red fluorescent layers, and provides adjustable color temperature and rendering. This multi-functionality is achieved within a unified module structure that integrates all these functions, reducing the need for separate components and control systems.
3Adaptability or versatility
If LED chips are controlled separately to achieve flexible light output, then light output flexibility is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic control of light output by enabling independent intensity adjustment of each LED chip and fluorescent layer combination. The driver circuit can dynamically vary the drive currents to the first, second, and third blue LED chips, as well as control the excitation of different fluorescent layers, allowing real-time adjustment of color temperature and color rendering index (CRI). This dynamic control provides flexibility to adapt to different lighting scenarios without requiring complex mechanical adjustments.
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
Enhances color rendering capabilities and light output flexibility by separately controlling LED chips with different fluorescent layers, allowing for tailored light emission based on object type, thereby improving visual perception.
Implementation Method 1
a first fluorescent layer and a second fluorescent layer have different types of fluorescent materials... the LED module emits a first light above the first area and a second light above the second area for generating a mixed light
Data Source
AI summary
A lighting apparatus includes a LED module and a driver. The LED module includes a first LED chip, a second LED chip, a first fluorescent layer, a second fluorescent layer and a package frame. The first LED chip and the second chip are respectively disposed at a first area and a second area of the package frame. The first fluorescent layer covers the first area. The second fluorescent layer covers the second LED chip. The first fluorescent layer and the second fluorescent layer have different types of fluorescent materials. The driver generates a driving current supplied to the LED module so that the LED module emits a first light above the first area and a second light above the second area for generating a mixed light by the first light and the second light.