Full-Spectrum LED Lighting with Multi-Blue Chip Spectral Balancing
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Solution Overview
Problem
Current full spectrum white light LEDs exhibit poor light efficiency and stability due to inadequate spectral continuity, particularly in the 480-500 nm wavelength range, and insufficient long-wave red light energy, as well as instability in blue light chip excitation currents leading to uneven light output and potential eye strain.
Innovation Solution
A full spectrum semiconductor lighting device comprising multiple blue light LED chips with different peak wavelengths and various fluorescent powders with specific peak wavelength ranges, optimizing the combination to achieve a broader spectral output and improved light efficiency, stability, and color rendering index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single blue light chip is used to excite fluorescent materials, then the device structure is simple, but the spectral continuity is poor and blue light intensity is excessively high
Solution Approach 1:
The patent divides the single blue light chip into multiple blue light chips with different peak wavelengths (first blue light chip with 435-450 nm and second blue light chip with 460-480 nm). This segmentation allows each chip to excite different fluorescent materials effectively, achieving continuous spectrum coverage while maintaining relatively simple device structure.
2Stability of the object's composition
If multiple blue light chips with different wavelengths are used, then spectral continuity improves, but light efficiency and stability deteriorate
Solution Approach 1:
The patent applies local quality by matching specific blue light chips with specific fluorescent materials based on their excitation characteristics. The first blue light chip (435-450 nm) excites yellow fluorescent material and red fluorescent material, while the second blue light chip (460-480 nm) excites green fluorescent material and red fluorescent material. This localized optimization ensures each chip-fluorescent material pair operates at peak efficiency, resolving the reliability issue.
3Productivity
If blue light intensity is increased to improve white light efficiency, then light efficiency improves, but eye strain and vision fatigue increase
Solution Approach 1:
The patent changes the wavelength parameter of blue light chips from a single wavelength to multiple wavelengths (435-450 nm and 460-480 nm). This parameter change allows the system to achieve high white light efficiency through optimized fluorescent excitation while distributing the blue light energy across different wavelengths, reducing the concentration of harmful short-wave blue light and thereby mitigating eye strain and vision fatigue.
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 device generates a light source closer to natural light, enhancing color reproduction and visual comfort, with improved stability and efficiency, reducing the risk of eye strain and maintaining consistent light output over time.
Implementation Method 1
a blue light LED chip; wherein the blue light LED chip comprise at least two blue light chips with peak wavelengths within a first wavelength range
Implementation Method 2
the fluorescent powder include a first fluorescent powder, a second fluorescent powder, a third fluorescent powder, and a fourth fluorescent powder
Implementation Method 3
the peak wavelength of the first fluorescent powder lies within a second wavelength range, the peak wavelength of the second fluorescent powder lies within a third wavelength range, the peak wavelength of the third fluorescent powder lies within a fourth wavelength range, and the peak wavelength of the fourth fluorescent powder lies within a fifth wavelength range
Data Source
AI summary
The invention relates to the field of lighting technology and addresses the issues of poor light efficiency and stability in existing full spectrum white light LED implementations, which provides a full spectrum semiconductor lighting device and health lighting fixture, which includes: blue light LED chips and fluorescent powders. The blue light LED chips comprise at least a first and second blue light chip, each with peak wavelengths within a specific wavelength range, differing from each other. The fluorescent powders include first, second, third, and fourth fluorescent powders, each with peak wavelengths in distinct wavelength ranges. Through the synergistic use of chips and fluorescent powders, the invention enables the resulting full spectrum lighting devices to have higher light efficiency and stability.