Four-Unit LED Light Engine for Color Tuning and CCT Dimming
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Solution Overview
Problem
Existing lighting solutions require at least five components to achieve chromaticity tunability and dimming of color temperature, which increases complexity and cost, whereas a solution with fewer components is needed to efficiently tune ambient light and dim color temperature.
Innovation Solution
A light emitting device comprising a red, green, blue, and white light emitting unit, where the red unit includes a first blue light chip and red fluorescent material, and the white unit includes a second blue light chip and multicolor fluorescent material, allowing for color temperature tuning and ambient light adjustment using only four units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If at least five different components are used to independently complete color tuning and dimming, then chromaticity tunability and color temperature dimming functions are achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple light emitting units (red, green, blue, and white LED units) into a single integrated device that can simultaneously achieve chromaticity tuning and color temperature dimming. By merging these functions into one device with four light emitting units, the patent reduces the need for separate independent components while maintaining full functionality.
Solution Approach 2:
The light emitting device is designed with multi-functional capability, where the same four light emitting units serve multiple purposes: the red, green, and blue units enable chromaticity tuning across a wide color gamut, while the white LED unit provides color temperature dimming. This universal design allows a single device to perform what traditionally required multiple separate components.
2Adaptability or versatility
If at least five different components are used to independently complete color tuning and dimming, then color temperature dimming and ambient light tuning functions are achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates color temperature dimming and ambient light tuning functions into a single manufactured device using four light emitting units. This consolidation reduces manufacturing complexity and material costs compared to producing and assembling five or more separate components, while maintaining full functional capability.
Solution Approach 2:
The device achieves multi-functionality with reduced component count, allowing a single manufacturing process to produce a device that can both dim color temperature and tune ambient light chromaticity. This universal design simplifies the manufacturing supply chain and reduces overall production costs.
3Adaptability or versatility
If narrow FWHM light beams are used for chromaticity tuning, then color gamut widens, but continuous spectrum for color temperature dimming deteriorates
Solution Approach 1:
The patent segments the light emitting functions into distinct units with different spectral characteristics: narrow FWHM red, green, and blue LED units for chromaticity tuning to achieve wide color gamut, combined with a white LED unit that provides a broader spectrum for smooth color temperature dimming. This segmentation allows each unit to optimize its specific function while working together as a unified system.
Solution Approach 2:
The device employs a composite approach by combining multiple light emitting units with different spectral properties. The narrow-band red, green, and blue units provide pure spectral lines for accurate color tuning, while the white LED unit contributes a continuous spectrum that fills gaps and ensures smooth transitions during color temperature dimming, creating a composite light output with both wide gamut and spectral continuity.
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 reduces costs while maintaining high color rendering indexes and achieving a wide color gamut, enabling effective dimming of color temperature and tuning of ambient light with improved color richness and stability.
Implementation Method 1
The red light emitting unit includes a first blue light emitting chip and a red fluorescent material
Implementation Method 2
the white unit includes a second blue light chip and multicolor fluorescent material
Data Source
AI summary
A light emitting device is provided. The device includes a red light emitting unit, a blue light emitting unit, a green light emitting unit, and a white light emitting unit. The red light emitting unit includes a first blue light emitting chip and a red fluorescent material, and a dominant wavelength of a light emitted by the red light emitting unit is in a range of 615 nanometers (nm) to 635 nm. By designing the light emitting device into a structure including the red light emitting unit, the blue light emitting unit, the green light emitting unit and the white light emitting unit, and designing the structure of the red light emitting unit, the light emitting device can realize the adjustment of ambient light and color temperature by the four light emitting units, thereby reducing cost.