LED Module Varying Color Conversion Material Thickness
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Solution Overview
Problem
Existing LED modules with optical mixing elements for color conversion reduce light intensity and output, limiting the adjustment of color tone and chromaticity coordinates.
Innovation Solution
A LED module with at least three LED chips on a substrate, featuring an encapsulation layer with varying thicknesses of color conversion material and optional globe-tops or submounts for precise control of light emission spectra, allowing separate current control for each group of LED chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an optical mixing element is applied on top of LED chips to mix different light emissions, then homogenous light output is achieved, but light intensity and light output of each channel are reduced
Solution Approach 1:
The patent divides the LED module into multiple groups (first group and second group) with different quantities of color conversion material. This segmentation allows each group to contribute differently to the overall light output, achieving homogeneity while preserving intensity by optimizing the distribution of color conversion material across different LED chip groups.
Solution Approach 2:
The patent applies different quantities of color conversion material to different groups of LED chips based on their specific emission characteristics. The first group receives a lower quantity of color conversion material while the second group receives a higher quantity, creating local optimization that maintains light intensity while achieving overall homogeneity.
2Manufacturing precision
If the quantity of color conversion material is increased to improve color mixing, then chromaticity coordinates can be adjusted, but light intensity is reduced
Solution Approach 1:
The patent changes the parameter of color conversion material quantity by applying different amounts to different LED chip groups. This parameter variation enables precise control of chromaticity coordinates while maintaining optimal light intensity through the differentiated distribution strategy between first and second groups.
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 light output and color adjustment capabilities by optimizing the distribution and thickness of color conversion material, enabling more accurate control of chromaticity coordinates and light intensity.
Implementation Method 1
The encapsulation layer comprises color conversion material for modifying the emission spectrum of the LED chips
Data Source
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AI summary
It is proposed a LED module (1) comprising a substrate (5) for LED chips, at least two LED chips (2, 3, 4) mounted directly or indirectly on the substrate (5), and an encapsulation layer (9) arranged on the LED chips (2, 3, 4) and comprising color conversion material for modifying the emission spectrum of the LED chips (2, 3, 4) r wherein the quantity of color conversion material arranged on a first group of at least one LED chip (4) is lower than the quantity of color conversion material arranged on a second group of at least one LED chip (2, 3).