Ma Xiaole introduced that the composition of the phosphor directly determines the color coordinate, emission wavelength and half-width of the phosphor, which affects the color temperature color rendering index of the device; the particle morphology of the phosphor affects the luminous intensity and luminous flux of the device; The distribution plays a decisive role in the coating performance and uniformity of the phosphor; and the degree of crystallization of the phosphor will have a direct impact on the aging performance and the service life of the device.
Dr. Ma Xiaole, Research Institute of Rare Earth Luminescent Materials
For the LED filament lamp products that are currently leading the new R&D boom of white LED lighting, there are also researches on rare earth phosphors.
"Because the development trend of LED filament lamps is high luminous efficiency, high color rendering and high power, it puts higher requirements on the particle size distribution, particle crystallinity and light decay of phosphors." Ma Xiaole said that there are high research and development of rare earths. The crystalline aluminate yellow-green powder solves the common technical problem of the appearance and crystallinity of the aluminate phosphor powder, and greatly improves the phosphor coating performance, heat resistance and radiation resistance.
In addition, in the patent layout of phosphors, there are nearly 30 Chinese invention patents in the field of rare earth LED phosphors, and 17 are authorized; phosphors of aluminate, silicate and aluminosilicate systems in the United States and Japan. And South Korea obtained 8 licenses; in addition, YAG, Ga-YAG, Lu-YAG yellow green powder has international patents, providing intellectual property protection for device exports.
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