Three-Channel SSL Chip-On-Board for Tunable Melanopic Activity
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Solution Overview
Problem
Existing light generating systems do not provide light with a tunable Melanopic Daylight Efficacy Ratio (MDER) value while maintaining a substantially fixed correlated color temperature (CCT) and high Color Rendering Index (CRI).
Innovation Solution
A light generating system comprising three SSL light source strings, each configured to generate light with specific color points and correlated color temperatures. The system includes luminescent materials that convert light from SSL light sources, allowing for independent control of MDER, CCT, and CRI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing light generating systems are used, then the system structure is simple, but the light cannot provide tunable MDER value while maintaining fixed CCT and high CRI
Solution Approach 1:
The light generating system is divided into three independent SSL light source strings, each capable of generating light with different color points and correlated color temperatures. This segmentation allows independent control of each string's output, enabling tunable MDER values while maintaining fixed CCT and high CRI by selectively adjusting the contribution of each string.
Solution Approach 2:
Each SSL light source string is assigned specific local characteristics with distinct color points and correlated color temperatures. The first string generates light with a first color point and first CCT, the second string generates light with a second color point and second CCT, and the third string generates light with a third color point and third CCT. This local quality differentiation enables precise control over the overall light output properties.
2Adaptability or versatility
If multiple SSL light source strings with different color points are used, then tunable MDER and high CRI are achieved, but the device complexity increases
Solution Approach 1:
Each SSL light source string serves multiple functions: they can individually contribute to generating light with different CCT values, different CRI values, and different MDER values. By combining the outputs of these multi-functional strings with independent current control, the system achieves tunable MDER and high CRI without requiring separate dedicated components for each function.
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 system enables the generation of light with variable MDER while maintaining a constant color point and CCT, and can achieve high CRI values, meeting the requirements for various lighting applications.
Implementation Method 1
The light generating system may comprise a first SSL light source string, a second SSL light source string and a third SSL light source string... each comprising at least one SSL light source and at least one luminescent material configured to convert at least part of the light from the SSL light source into light from the luminescent material
Data Source
AI summary
The invention provides a light generating system (1000), configured to white light with a tunable MDER value. Especially, the invention provides a light generating system (1000), configured to generate system light (1001), wherein the light generating system (1000) comprises a first SSL light source string (100), a second SSL light source string (200) and a third SSL light source string (300), wherein: (A) the first SSL light source string (100) is configured to generate first light (105) having a first color point and a first correlated color temperature CCT1, and which comprises at least one first SSL light source (101) for generating violet and/or blue light and a first luminescent material (400); (B) the second SSL light source string (200) is configured to generate second light (205) having a second color point and a second correlated color temperature CCT2, and which comprises at least one second SSL light source (201) for generating violet and/or blue light and a second luminescent material (400); (C) the third SSL light source string (300) is configured to generate third light (305) having a third color point and a third correlated color temperature CCT3, and which comprises at least one third SSL light source (301) for generating cyan light and a third luminescent material (400); (D) the first correlated color temperature is lower than the second correlated color temperature; and (E) the first correlated color temperature is lower than the third correlated color temperature.