Luminaire Packaged LED Composition for TM-30 Color Rendering
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Solution Overview
Problem
Existing luminaires struggle to achieve high fidelity and preference in color rendering while maintaining vividness, as these design priorities are often mutually exclusive, and there is a need for improved efficiency and control in lighting systems.
Innovation Solution
The luminaire incorporates a light-emitting device with specific LED dies and phosphor compounds that emit white light satisfying TM-30 standards for preference P1 and fidelity F3, along with an electronic control system for independent power control and network connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high fidelity and preference in color rendering are achieved, then color rendering quality is improved, but vividness deteriorates as these design priorities are often mutually exclusive
Solution Approach 1:
The patent divides the light source into multiple LED dies with different peak wavelengths (first LED die with peak L1, second LED die with peak L2) and uses separate phosphor compounds for each wavelength region. This segmentation allows independent optimization of color rendering fidelity and vividness by controlling the spectral power distribution in different wavelength ranges separately.
Solution Approach 2:
The patent employs composite phosphor materials including first phosphor compound with peak LP1, second phosphor compound with peak LP2, and third phosphor compound with peak LP3. These composite phosphor materials are positioned to receive light from respective LED dies and convert wavelengths, enabling simultaneous achievement of high fidelity (accurate color reproduction) and vividness (saturated colors) by carefully selecting phosphor combinations and their relative concentrations.
2Measurement precision
If multiple phosphor compounds and LED dies are used to achieve TM-30 standards, then color rendering is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple LED dies (first LED die with peak L1, second LED die with peak L2) and multiple phosphor compounds (first phosphor compound with peak LP1, second phosphor compound with peak LP2, third phosphor compound with peak LP3) into a single integrated light emitting device. This merging approach achieves TM-30 P1 and F3 color rendering standards while maintaining a compact packaged LED device structure, avoiding the need for separate lighting modules.
Solution Approach 2:
The packaged LED device serves multiple functions simultaneously: it provides high efficacy white light output (200 lumens per Watt), achieves TM-30 P1 preference and F3 fidelity color rendering standards, enables dynamic control of correlated color temperature, and maintains a compact form factor. The single device integrates functions that would traditionally require multiple separate components.
3Use of energy by moving object
If high optical efficiency of 200 lumens per Watt is achieved, then energy efficiency is improved, but maintaining high fidelity and preference becomes more difficult
Solution Approach 1:
The patent optimizes key parameters including the peak wavelengths (L1, L2, LP1, LP2, LP3) of LED dies and phosphor compounds, the relative concentrations of the three phosphor compounds in the light conversion material, and the relative luminosity of the first and second LEDs. By carefully adjusting these parameters, the device achieves both high optical efficiency (200 lumens per Watt) and TM-30 P1/F3 color rendering performance simultaneously.
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 luminaire achieves high optical efficiency, uniform light properties, and dynamic control of correlated color temperature, while meeting TM-30 color rendering standards, with the ability to output 200 lumens per Watt and maintain high fidelity and preference.
Implementation Method 1
a first LED die having a peak emission wavelength L1 in a blue or shorter wavelength... a light conversion material... including: (i) a first phosphor compound having a peak emission wavelength LP1 in a green wavelength; (ii) a second phosphor compound having a peak emission wavelength LP2 in an orange wavelength; and (iii) a third phosphor compound having a peak emission wavelength LP3 in a red, orange, yellow, green, or cyan wavelength
Implementation Method 2
a second LED die having a peak emission wavelength L2 in a red, orange, yellow, green, or cyan wavelength... the light conversion material including: (i) a first phosphor compound having a peak emission wavelength LP1 in a green wavelength; (ii) a second phosphor compound having a peak emission wavelength LP2 in an orange wavelength; and (iii) a third phosphor compound having a peak emission wavelength LP3 in a red, orange, yellow, green, or cyan wavelength
Data Source
AI summary
A device includes a LED die having a peak emission at a blue or shorter wavelength, a LED die having a peak emission at a red, orange, yellow, green, or cyan wavelength, and a homogenous light conversion material positioned to receive light emitted from the LED dies. The light conversion material including: (i) a first phosphor compound having a peak emission at a green wavelength; (ii) a second phosphor compound having a peak emission at an orange wavelength; and (iii) a third phosphor compound having a peak emission at a red, orange, yellow, green, or cyan wavelength. The device is a packaged LED device and a relative concentration of the phosphor compounds and a relative luminosity of the LED dies are selected so the device emits white light satisfying a preference P1 and a fidelity F3 according to a TM-30 standard for color rendering.